WO2014129820A1

WO2014129820A1 - Display device

Info

Publication number: WO2014129820A1
Application number: PCT/KR2014/001381
Authority: WO
Inventors: 양세우; 서금석; 박종성; 박민수; 황지영; 정재호; 문인주; 박용수
Original assignee: 주식회사 엘지화학
Priority date: 2013-02-20
Filing date: 2014-02-20
Publication date: 2014-08-28
Also published as: WO2014129821A1

Abstract

The present application provides a display device including: a display panel; a rear element arranged in the back of the display panel; a packaging film for packaging the rear element; and an adhesive layer formed between the display panel and the packaging film, wherein the packaging film includes a first region corresponding to the front of the rear element, and a second region extended from the first region so as to correspond to the side of the rear element. According to the present application, the bezel region can be minimized.

Description

Display device

The present application relates to an improved display device.

Display devices are usefully used in various electronic products. For example, devices such as liquid crystal displays (LCDs) are used in various products such as mobile phones, personal digital assistants (PDAs), electronic game consoles, monitors, and TVs.

In general, a display device has a display panel for displaying an image. In addition, most display apparatuses include a rear element provided on the back of the display panel. For example, a liquid crystal display (LCD) device includes a back light unit (BLU) as a back element.

1 is a cross-sectional view showing an example of a display device according to the prior art, which specifically shows a liquid crystal display (LCD) device.

Referring to Fig. 1, a liquid crystal display (LCD) device has a liquid crystal display panel 10 for displaying an image. In general, the liquid crystal display panel 10 cannot emit light by itself, and receives light from the outside to implement an image. Accordingly, the backlight unit 20 is provided on the rear surface of the liquid crystal display panel 10 as a rear element.

The backlight unit 20 is, for example, from the light source 22 while guiding the light source 22 such as a light emitting diode (LED) and the light of the light source 22 to the liquid crystal display panel 10. A light guide plate 24 for converting the point light source emitted into a surface light source, and a diffusion sheet 26 for diffusing the light emitted from the light guide plate 24.

In addition, the liquid crystal display panel 10 has a liquid crystal cell layer 12 (cell layer) made of liquid crystal whose light transmittance changes as an electrical signal is applied. The liquid crystal display panel 10 transmits or blocks light by changing or maintaining the polarization direction of linearly polarized light passing through the liquid crystal according to the arrangement state of the liquid crystal. To this end, the liquid crystal display panel 10 has a front polarizing plate 14 formed on the upper portion of the liquid crystal cell layer 12 and a rear polarizing plate 16 formed on the lower portion of the liquid crystal cell layer 12.

In addition, the conventional display device including the liquid crystal display (LCD) device and the like includes a molding frame 30 for assembling each component. As illustrated in FIG. 1, after the backlight unit 20 is stacked on the rear surface of the liquid crystal display panel 10, the backlight units 20 are assembled and fixed through a molding frame 30 made of a resin material.

For example, Republic of Korea Patent No. 10-0824866, Republic of Korea Patent No. 10-0876236, Republic of Korea Patent No. 10-0876248 and Republic of Korea Patent No. 10-1178577 and the like related to the above technology is presented.

However, the display device according to the related art has a bezel (B) as shown in FIG. 1 due to the use of the molding frame 30 as described above, and the area of the bezel (B) is also large. Due to the bezel B, there is a problem in that the screen on which the actual image is displayed is smaller than the surface area of the liquid crystal display panel 10.

In addition, the display device according to the prior art may cause problems such as handling and assembly of the back element, that is, the backlight unit 20. For example, optical members such as the light guide plate 24 and the diffusion sheet 26 are inserted into and fixed to the molding frame 30, and these are laminated on the rear surface of the liquid crystal display panel 10 to be assembled through the molding frame 30. Excessive time is required in the process, and may cause damage to the

optical members

24 and 26. In addition, the assembly through the molding frame 30, the sealing performance may be generated light leakage phenomenon. Such a problem may increase the cost of the display device, lower the yield, and may adversely affect performance.

Thus, the present application provides an improved display device. The present application provides, for example, a display device with a minimized bezel area.

According to the first aspect of the present application,

Display panel;

A rear element disposed on a rear surface of the display panel;

A packaging film for packaging the back element; And

Including a pressure-sensitive adhesive layer formed between the display panel and the packaging film,

The packaging film,

A first region corresponding to the front surface of the rear element; And

A display device extends from the first area and includes a second area corresponding to a side surface of the back element.

In accordance with a second aspect of the present application,

Display panel;

A rear element disposed on a rear surface of the display panel; And

A packaging film for packaging the display panel and the rear element,

The packaging film,

A first area corresponding to a front surface of the display panel; And

A display device extends from the first area and includes a second area corresponding to a side surface of the display panel and a side surface of the rear element.

The packaging film may have a plane direction phase difference Rin of 30 nm or less, according to the first embodiment.

The packaging film may have a thickness direction phase difference Rth of 35 nm or less, according to the second embodiment.

In the packaging film, according to a third embodiment, a notch part may be formed at a boundary between the first area and the second area.

According to the fourth embodiment, the packaging film may satisfy the area of the first region and the following [mathematical formula].

[Equation]

T [μm] = 100 x S [m 2] + a

(In the above formula, T is the thickness of the packaging film (unit: μm), S is the area (width x length, unit: m 2) of the first region, and a is a number from 15 to 130.)

The packaging film may have one or more physical properties selected from the following (a) to (c) according to the fifth embodiment.

(a) Tensile modulus of at least 1,200 MPa

(b) a tensile strength of at least 40 MPa

(c) elongation at least 20%

According to the sixth embodiment, the packaging film may have a strain (E) of 5% or less according to the following [mathematical formula].

[Equation]

E (%) = [(L2-L1) / L1] x 100

(In the above equation, L1 is the initial length (horizontal or vertical) of the packaging film, and L2 is the elongated length of the packaging film after being left for one day (24 hours) with a load of 3 kg at a temperature of 80 ° C.)

According to a seventh embodiment, the packaging film may extend from the second region, and further include a third region corresponding to the rear surface of the back element, and the overlapping prevention portion may be formed in the third region. .

In the packaging film, according to the eighth embodiment, at least the second region may have a light impermeability in the second region and the third region.

In the packaging film, according to the ninth embodiment, a light impermeable treatment part may be formed at an edge of the first region.

In the packaging film, according to the tenth embodiment, a protrusion may be provided in the first region.

In the packaging film, according to an eleventh embodiment, an easy attaching part may be formed on a front surface of the first region.

According to the twelfth embodiment of the packaging film, the back surface of the first region may have an uneven surface.

In addition, the rear element may include an optical element. The optical element includes a light source; A light guide plate for converting the point light source emitted from the light source into a surface light source; It may include a diffusion sheet for diffusing the light emitted from the light guide plate.

In addition, the display device according to the present application may further include a barrier layer formed on a side surface of the display panel. The barrier layer may have at least moisture barrier property. The barrier layer may include, for example, one or more selected from a moisture barrier resin layer, a metal thin film layer, and a deposition layer.

According to the present application, an improved display device can be implemented. For example, bezel areas can be minimized. In addition, in the manufacturing (assembly) process of the display device, damage to the components can be prevented, and the process can be simplified.

1 is a cross-sectional configuration diagram of a display device according to the prior art.

2 is a cross-sectional configuration diagram of a display device according to an embodiment.

3 is a cross-sectional configuration diagram of a display device according to an embodiment.

4 is a cross-sectional configuration diagram of a display device according to an embodiment.

5 is a plan view (development view) showing an embodiment of a packaging film.

FIG. 6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

7 is a plan view (development diagram) showing an embodiment of a packaging film.

8 is a plan view (development view) showing an embodiment of a packaging film.

9 is a plan view (development view) showing an embodiment of a packaging film.

10 is a cross-sectional configuration diagram of a display device according to the embodiment.

11 is a cross-sectional configuration diagram of a display device according to an embodiment.

12 is a cross-sectional configuration diagram of a display device according to the embodiment.

It is a top view (development view) which shows embodiment of a packaging film.

14 is a cross-sectional view taken along the line AA ′ of FIG. 13.

15 is a plan view (development view) showing an embodiment of a packaging film.

It is a top view (development view) which shows embodiment of a packaging film.

In the present specification, 'and / or' is used to mean at least one of the components listed before and after.

As used herein, the terms "first", "second", and "third" are used to distinguish one component from another component, and each component is not limited by the terms. .

In the present specification, terms indicating directionality, 'front', 'side' and 'back' are terms based on the direction viewed from the observer (viewer) side of the display device, unless otherwise specified.

As used herein, the term "correspondence" means that the surfaces facing each other correspond in some or all.

In the present specification, "formed on", "formed on", "formed on", "formed on the side", and the like do not mean that the components are directly contacted and stacked, and the components It includes that the other component is formed between the liver. For example, "formed on" means that the second component is formed in direct contact with the first component, as well as a third component is added between the first component and the second component. Include meanings that can be formed.

In the present specification, "extension forming" does not mean that one component (first component) is integrally extended to another component (second component), and two components ( The first component and the second component) may be separate members, which may include a case in which the shape itself is extended by engagement even though not integrally.

As used herein, "light transmission" may mean that the visible light to be irradiated has a transmittance of, for example, 60% or more, for example, 80% or more, for example, 90% or more on a straight line. As used herein, "light impermeable" may mean that visible light to be irradiated has a transmittance of, for example, 40% or less, for example 30% or less, for example 20% or less, for example 10% or less, in a straight line. have.

Hereinafter, a display apparatus according to the first and second aspects of the present application will be described with reference to the accompanying drawings. The accompanying drawings show exemplary forms of the present application, which are provided to assist in understanding the present application. In the accompanying drawings, the thicknesses are enlarged in order to clearly express various layers and regions, and the scope of the present application is not limited by the thicknesses, sizes, and ratios shown in the drawings. In describing the present application, detailed descriptions of related general functions or configurations are omitted.

First form

2 to 9 illustrate embodiments of the display device according to the first aspect of the present application.

The display device according to the first aspect of the present application includes a display panel 100; A rear element 200 installed on a rear side of the display panel 100; A packaging film 300 for packaging the back element 200; And an adhesive layer 400 formed between the display panel 100 and the packaging film 300.

The packaging film 300 packages the rear element 200 installed on the rear surface of the display panel 100. The packaging film 300 wraps around at least the front surface 201 and the side surface 202 of the rear element 200. To this end, the packaging film 300 may include a first region 310 corresponding to the front surface 201 of the rear element 200 and a second region 320 corresponding to the side surface 202 of the rear element 200. Include. The second region 320 extends from the first region 310. The adhesive layer 400 attaches and fixes the display panel 100 and the packaging film 300.

According to the present application, an improved display device is implemented. For example, the packaging film 300 and the adhesive layer 400 attach and fix the display panel 100 and the rear element 200 to minimize the bezel area. According to the present application, the use of the molding frame 30 (refer to FIG. 1) may be eliminated, thereby implementing a display device having almost no bezel. In addition, problems that may occur in the handling and assembly of the back element 200, for example an optical element on a film (or sheet) or the like, are improved.

In the present application, the display panel 100 is not particularly limited. The display panel 100 should just be able to display an image.

The display panel 100 may include, for example, an element for displaying an image by changing light transmittance, or may include an element for displaying an image by emitting a phosphor. The display panel 100 may include, for example, a liquid crystal display panel (LCD panel) for displaying an image through a liquid crystal whose light transmittance is changed; A plasma display panel (PDP; Plasma Display Panel) in which a gas discharge occurs between two electrodes, and a phosphor emits light by ultraviolet rays generated by the gas discharge; And / or organic light emitting diodes (OLEDs) may be selected from a display panel such as an organic field display panel in which an organic light emitting diode (OLED) emits light to display an image by electrical excitation applied to an electrode.

2-4 illustrate exemplary embodiments of the display panel 100. 2 to 4 specifically illustrate a liquid crystal display (LCD) panel.

2 to 4, the display panel 100 includes, for example, one or more liquid crystal cell layers 120 and

polarizing plates

140 and 160 formed on both surfaces of the liquid crystal cell layer 120. do. The

polarizers

140 and 160 may include a front polarizer 140 formed on the liquid crystal cell layer 120 and a rear polarizer 160 formed under the liquid crystal cell layer 120.

The liquid crystal cell layer 120 is interposed between a thin film transistor (TFT) substrate, a color filter substrate facing the thin film transistor (TFT) substrate, and the two substrates. It may include a liquid crystal cell whose light transmittance changes as an electrical signal is applied.

The front (upper) polarizer 140 and the rear (lower) polarizer 160 may have polarization characteristics, and their optical axes may be perpendicular to each other. For example, the optical axis of the front polarizer 140 may be a vertical direction of the display panel 100, and the optical axis of the rear polarizer 160 may be a horizontal direction of the display panel 100. In one example, the front polarizer 140 and the rear polarizer 160 may each include a polarizer and a protective film formed on one or both sides of the polarizer. The polarizer may be selected from, for example, a polarizable polyvinyl alcohol (PVA) film. The protective film may be, for example, a film including one or more selected from triacetyl cellulose (TAC), an acrylic resin, and the like. In addition to these, the display panel 100 may be formed with a pixel electrode for driving a pixel, and the like is omitted in the drawing.

In addition, the display panel 100 may further include other functional films or layers in addition to the liquid crystal cell layer 120, the front polarizer 140, and the rear polarizer 160. The display panel 100 may further include, for example, a light diffusion layer, a viewing angle compensation film, a retardation film, an antireflection layer, an antiglare layer, and / or a protective film layer for protecting them. The films or layers may be formed on the front polarizer 140 or the rear polarizer 160. For example, one or more selected from a light diffusion layer, an antireflection layer, an antiglare layer, a protective film layer for protecting them, and the like may be further formed on the front polarizer 140. These may be stacked on the front polarizer 140 as a separate member, or may be directly formed on the upper surface of the front polarizer 140. For example, the anti-glare layer may be directly formed on the upper surface of the front polarizer 140 through a surface treatment such as a haze treatment.

In the present application, the rear element 200 is not particularly limited as long as it is installed on the rear surface of the display panel 100. The back element 200 may be composed of one member or may have a multilayer structure including two or more members. The shape and function of each member constituting the back element 200 is not limited. The back element 200 may have, for example, a shape of a film, a sheet, a flat plate, and / or a three-dimensional device. For example, the back device 200 may include an electric / electronic device having an electric / electronic function; An optical element having an optical function; And / or one or more selected from heat dissipation elements having a heat dissipation function. The rear element 200 is wrapped and packaged by the packaging film 300 as described below.

2 exemplarily illustrates the rear element 200 having a single member. In this case, the back element 200 shown in FIG. 2 may be selected from, for example, an optical element 200A, an electronic circuit board, a heat sink, and the like. As a specific example, the back element 200 may be selected from the optical element 200A.

In the present application, the optical element 200A is not limited as long as it has an optical function. The optical element 200A may be, for example, an element having functions such as light diffusion, condensation, polarization, and / or reflection, but is not limited thereto. In addition, the optical device 200A may include a light source for generating light. In the present application, the optical element 200A includes a light source for generating light, and / or all kinds of devices, films and / or sheets, etc. used to process the light.

The optical element 200A may be, for example, at least one selected from a light guide plate, a diffusion sheet, a brightness enhancing film, a prism film, a lens film, a polarizing film, a reflective film, a viewing angle compensation film, a retardation film, a protective film for protecting them, and the like. It may include an optical member (200a). In addition, the optical device 200A may be selected from a light source assembly further including a light source 240 in the optical member 200a. At this time, the specific shape of the light source assembly is not particularly limited, and may be selected from, for example, a conventional direct type or edge type light source assembly. As a specific example, the light source assembly as the optical element 200A may include a backlight unit (BLU) commonly used in a liquid crystal display (LCD) device.

3 and 4 illustrate an optical element 200A having a multilayer structure as the back element 200. Specifically, as the back element 200, FIG. 3 illustrates an optical element 200A including a plurality of optical members 200a, and FIG. 4 includes a plurality of optical members 200a and a light source 240. The optical element 200A is illustrated.

Referring to FIG. 3, the optical element 200A is an optical member 200a that includes a light guide plate 210 that converts a point light source emitted from a light source into a surface light source; And a diffusion sheet 220 formed on the light guide plate 210 to diffuse light from the light guide plate 210. In addition, the optical device 200A may further include a brightness enhancement film 230 formed on the diffusion sheet 220. The optical members 200a may be formed in one layer or two or more layers, respectively. 3 illustrates a state in which the brightness enhancement film 230 is formed of two layers. The optical device 200A is packaged by the packaging film 300 and installed on the rear surface of the display panel 100 as shown in FIG. 3. In this case, in FIG. 3, the light source for supplying light to the light guide plate 210 is not shown, but the light source may be separately provided to the outside to supply light to the light guide plate 210, for example.

In addition, referring to FIG. 4, as the rear element 200, the optical element 200A may include an optical member 200a and a light source 240. And they form an assembly and can be packaged by the packaging film 300. Specifically, optical element 200A is a light source assembly that includes a light source 240, which includes one or more light sources 240; It may include an optical member (200a) formed on the light source 240. The optical member (200a) is a plurality, the light guide plate 210 for converting the point light source emitted from the light source 240 into a surface light source; The light guide plate 210 may include a diffusion sheet 220 formed on the light guide plate 210 to diffuse light from the light guide plate 210. As shown in FIG. 4, the optical device 200A may further include a brightness enhancing film 230 formed on the diffusion sheet 220.

In the present application, the light source 240 is not particularly limited as long as it can emit light. The light source 240 may include, for example, a light emitting diode (LED). The light source 240 may include a plurality of light emitting diodes (LEDs) and a case in which the light emitting diodes (LEDs) are embedded, according to an exemplary embodiment.

The packaging film 300 packages the back element 200, for example, the optical element 200A. In this case, the light source 240 may not be packaged by the packaging film 300 as shown in FIG. 3 or may be packaged together with the optical member 200a as shown in FIG. 4.

The packaging film 300 includes a first region 310 and a second region 320 extending from the first region 310. In this case, the first region 310 corresponds to the front surface 201 of the rear element 200, and the second region 320 corresponds to the side surface 202 of the rear element 200. The packaging film 300 preferably further includes a third region 330 for firm fixing force of the rear element 200. The third region 330 extends from the second region 320, which corresponds to the rear surface 203 of the rear element 200. 5-9 illustrate exemplary embodiments of the packaging film 300.

Among the

regions

310, 320, 330 of the packaging film 300, at least the first region 310 and the second region 320 have the same or similar area as the portion corresponding to the back element 200. Can have For example, the area of the first region 210 is the same as or similar to the area of the front surface 201 (see FIG. 2) of the rear element 200, and the area of the second region 220 is the side of the rear element 200. (202, see FIG. 2) may be the same as or similar to the area.

In addition, two or more second regions 320 may be provided. The second area 320 is, for example, two to four. That is, the second region 320 may extend from the first region 310, and may be formed on at least two or more surfaces of four surfaces of the first region 310. In addition, in the case of the third region 330, for example, two to four may be the same as the number of the second regions 320. For example, in FIG. 5, three second regions 320 are formed, and in the same manner, three third regions 330 are also illustrated.

In the present application, the packaging film 300 is not limited as long as the packaging film 300 further includes the first region 310 and the second region 320, preferably the third region 330. In addition, each of the

regions

310, 320, 330 may be integrally formed. The packaging film 300 is cut, for example, so that a single film has each of the

regions

310, 320, 330 as described above, so that each of the

regions

310, 320, 330 is integrally formed. Can be.

The packaging film 300 may be selected from a resin film, and the type of the resin film is not limited. The packaging film 300 is, for example, polycarbonate, polyester, polyolefin, cyclic polyolefin (COP; cyclo-olefin polymer), acrylic, urethane, epoxy, polyamide, cellulose, nylon And films including at least one resin selected from their derivatives and the like can be used. For example, the packaging film 300 may include a polycarbonate (PC) film, polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, polybutylene terephthalate (PBT) film, and polybutylene naphthalate (PBN). ) Film, polyethylene (PE) film, polypropylene (PP) film, cyclic polyethylene (PE) film, cyclic polypropylene (PP) film, acrylic film, triacetyl cellulose (TAC) film and / or nylon film May be exemplified, but is not limited thereto. Furthermore, the films listed above may be stretched or unstretched. As the packaging film 300, for example, an unstretched polycarbonate (PC) film or an unstretched polyethylene terephthalate (PET) film may be usefully used.

The packaging film 300 may have a light transmittance. In addition, the packaging film 300 may have optical properties such as polarization, condensing, and / or diffusion in some cases, and may have isotropy in some cases. At least the first region 310 may have this characteristic. In this case, it may be useful for packaging the optical element 200A.

In the present application, isotropy means that there is no retardation or that there is only a retardation such that even if retardation exists, the retardation is so small that it does not substantially affect the phase of light passing through the film.

According to the first embodiment of the present application, the packaging film 300 may have a plane direction phase difference Rin of 30 nm or less. If the plane retardation Rin exceeds 30 nm, the phase of light passing through the film 300 may be affected. For example, the packaging film 300 may have a plane direction phase difference Rin calculated by Equation 1 below 30 nm or less, 25 nm or less, or 10 nm or less, for example, 0 to 25 nm, 0 to 10 nm, 0.1 to 5 nm, 0.2 to 3 nm, or 0.5 to 2 nm.

In addition, the packaging film 300 may have a thickness direction phase difference Rth of 35 nm or less, according to the second embodiment of the present application. When the thickness direction retardation Rth exceeds 35 nm, the phase of light passing through the film 300 may be affected. The packaging film 300 may have, for example, a thickness direction retardation Rth calculated by Equation 2 below 35 nm, 30 nm, 20 nm, or 10 nm, for example, 0. To 30 nm, 0 to 20 nm, 0 to 10 nm, 0.1 to 5 nm, or 0.2 to 3 nm. In the present application, phase difference Rin (Rth) is an absolute value.

[Equation 1]

Rin = d x (nx-ny)

In Equation 1, Rin is the retardation in the plane direction, d is the thickness of the packaging film 300, nx is the refractive index of the slow axis direction of the packaging film 300 for the light of 400 ~ 600 nm wavelength, ny is It is a refractive index in the fast axis direction of the packaging film 300 for a wavelength of 400 to 600 nm.

[Equation 2]

Rth = d x (ny-nz)

In Equation 2, Rth is a thickness direction retardation, d is a thickness of the packaging film 300, ny is a refractive index in the fast axis direction of the packaging film 300 for light of 400 ~ 600 nm wavelength, nz is It is the refractive index of the thickness direction of the packaging film 300 with respect to the 400-600 nm wavelength.

The packaging film 300 is a non-stretched polycarbonate film, an unstretched polyester film, an unstretched acrylic film, an unstretched triacetyl cellulose film and / or an unstretched cyclic ring so as to satisfy the above phase difference. Polyolefin-based film and the like.

When packaging the rear element 200, the

respective regions

310, 320, and 330 are bent at the boundary lines C1 and C2. In the drawing, the boundary lines C1 and C2 between the

areas

310, 320 and 330 are indicated by dotted lines. At this time, each boundary line (C1) (C2) is shown for convenience of explanation, which may or may not be displayed substantially on the packaging film (300).

In packaging the back element 200 using the packaging film 300, for example, first, the first region 310 is positioned to correspond to the front surface 201 of the back element 200, and then the first boundary line. The second region 320 is bent at (C1), so that the second region 320 is positioned to correspond to the side surface 202 of the rear element 200. In addition, when the third region 330 is further included, the third region 330 is bent at the second boundary line C2 so that the third region 330 is formed on the rear surface 203 of the rear element 200. Packaged by placing corresponding to.

According to one exemplary embodiment, the packaging film 300 and the back element 200 may have an adhesive force between each other. The adhesion may be, for example, at the contact interface between the packaging film 300 and the back element 200. The method of attaching the packaging film 300 and the rear element 200 is not particularly limited, and this may be performed by, for example, applying a thermal and / or optical laminating method. For example, the packaging film 300 may be fused by applying heat, or may be fused through light irradiation to be attached to each other. In this case, the packaging film 300 may have an attachment force with the back element 200 in at least one selected from, for example, the second region 320 and the third region 330. When attaching through such a laminating method, the irradiation conditions of heat and light may be appropriately selected according to the type of the packaging film 300, which is not particularly limited.

According to another exemplary embodiment, the packaging film 300 and the rear element 200 may be attached to each other through a separate attachment means. As said attachment means, the adhesive layer (not shown) formed between the packaging film 300 and the back element 200 is mentioned, for example. In order to distinguish the pressure-sensitive adhesive layer from the pressure-sensitive adhesive layer 400 formed between the packaging film 300 and the display panel 100, hereinafter referred to as a 'second adhesive layer'.

The second adhesive layer may be formed at the contact interface between the packaging film 300 and the rear element 200 so as to achieve a bonding force between them. The second adhesive layer may be formed by coating the packaging film 300 and / or the back element 200. For example, the second adhesive layer may be formed on at least one selected from the second region 320 and the third region 330. More specifically, the second adhesive layer is formed on at least one inner surface of the second region 320 and / or the third region 330 among the

regions

310, 320, 330 of the packaging film 300. Can be.

As described above, the packaging film 300 and the rear element 200 may be formed of at least the second region 320 and the side surface 202 by a fusion method through heat and / or light or by an adhesive method through a second adhesive layer. ) And / or between the third region 330 and the back surface 203.

In addition, the attachment means may be, for example, double-sided or one-sided adhesive tape. In this case, the double-sided adhesive tape may be interposed between the packaging film 300 and the rear element 200. More specifically, the double-sided adhesive tape may be interposed between the second region 320 and the side surface 202 and / or between the third region 330 and the rear surface 203. In the case of the one-side adhesive tape, for example, the tape may be taped on the outer surface of the third region 330 to achieve a bonding force with the rear element 200.

5 and 6, according to the third embodiment of the present application, a notch part 350 may be formed at the boundary line C1 of the first region 310 and the second region 320. Can be. In addition, when the packaging film 300 further includes the third region 330, the notch 350 may also be formed at the boundary line C2 of the second region 320 and the third region 330. . 6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

In the present application, the notch 350 may be such that the second region 320 and the third region 330 can be easily bent at each boundary C1 and C2. The notch 350 may be formed through, for example, a notch process that may generate a thickness step at the boundary lines C1 and C2. For example, the notch 350 may be selected from an oscillation processing unit formed by pressing the boundary lines C1 and C2, and a half cutting unit formed by half cutting the boundary lines C1 and C2. Can be. In the present application, the half does not mean only half of the thickness of the packaging film 300.

The notch 350 may be formed to have a depth of, for example, 1/3 to 2/3 of the thickness of the packaging film 300 by oscillation or half cutting. At this time, if the depth of the notch 350 is less than 1/3, for example, a break may occur in some cases. And if the depth exceeds 2/3, the bending can be somewhat difficult, for example.

In addition, the notch 350 may be continuously formed along the boundary lines C1 and C2 or may be discontinuously formed at predetermined intervals. That is, the notch 350 may be discontinuously formed in a dotted line as shown by the boundary lines C1 and C2. In another example, the notch 350 may be selected from a plurality of fine holes drilled at predetermined intervals along the boundary lines C1 and C2, and the notches 350 in the present application may be formed as described above. The

regions

310, 320, 330 are not particularly limited as long as they allow easy bending at each boundary C1 and C2.

In addition, each of the

regions

310, 320, and 330 may have a bending strength of, for example, 1.0 gf to 10.0 gf at each boundary C1 and C2. This bending strength may be set by the notch 350. In this case, when the bending strength is less than 1.0 gf, handling may be inconvenient because it may be bent too easily at the boundary lines C1 and C2 or the

regions

310, 320 and 330 may overlap. And when the bending strength is more than 10.0 gf bending may not be easy. In view of this, each of the

regions

310, 320, 330 may have a bending strength of, for example, 2 to 8 gf, or 3 to 6 gf at each boundary C1 and C2. . The bending strength may mean, for example, a value measured according to ASTM D790 or the like.

The thickness of the packaging film 300 is not particularly limited. The thickness of the packaging film 300 may be variously set in consideration of supporting force, bending property of each

region

310, 320, 330, handling in packaging, and / or thinning of the film 300. .

According to the fourth embodiment of the present application, the thickness of the packaging film 300 may satisfy the area of the first region 310 and the following [Equation 3].

[Equation 3]

T [μm] = 100 x S [m 2] + a

In Equation 3, T is the thickness of the packaging film 300 (unit: μm), S is the area (width x length, unit: m 2) of the first region 310, and a is a number of 15 to 130. to be. Here, a includes integers as well as decimals.

When the thickness of the packaging film 300 satisfies Equation 3, the supporting force, bending workability of each

region

310, 320, 330, handling property during packaging, and / or thinning of the film 300 May be advantageous.

In Equation 3, S is an area of the first region 310, which may also be a front area of the rear element 200 corresponding to the first region 310. In another example, S in Equation 3 may be a front area of the display panel 100. In general, when a display device such as a TV or a monitor is installed on a wall, the display device may be installed to be inclined by about 10 degrees with the wall. In this case, when the thickness of the packaging film 300 is too thin without satisfying Equation 3, the support strength may be low to sag down or protrude forward. In addition, when the thickness of the packaging film 300 is too thick without satisfying the above Equation 3, the bending workability of each of the

regions

310, 320 and 330 is inferior due to the required strength, and a portion to be lifted after bending is generated. And may be disadvantageous in thinning. In consideration of this point, the thickness of the packaging film 300 may satisfy Equation 3 above.

The thickness of the packaging film 300 may vary depending on the area of the first region 310, etc., but may have a range of, for example, 20 μm to 500 μm, 30 μm to 400 μm, or 35 μm to 200 μm. Can be.

In addition, according to the fifth embodiment of the present application, the packaging film 300 includes (a) a tensile modulus of 1,200 MPa or more, (b) a tensile strength of 40 MPa or more, and (c) an elongation of 20% or more. It may have one or more physical properties selected from. In the case of having such physical properties, the back element 200 can be packaged and well supported.

Although it may vary depending on the back element 200, for example, when the tensile modulus is less than 1,200 MPa or the tensile strength is less than 40 MPa, the bearing capacity of the back element 200 may be insignificant. The upper limit of the tensile modulus and the tensile strength is not particularly limited. The packaging film 300 may have, for example, a tensile modulus of 1,200 to 5,000 MPa, 1,500 to 4,000 MPa, 1,800 to 3,000 MPa, 1,900 to 2,500 MPa, or 2,000 to 2,400 MPa. In addition, the packaging film 300 may have a tensile strength of, for example, 40 to 200 MPa, 45 to 150 MPa, 50 to 100 MPa, or 55 to 75 MPa. In addition, when the elongation is less than 20%, for example, handling may be inferior in packaging. The upper limit of the elongation is not limited, but may be, for example, 200% or less in consideration of the bearing capacity of the back element 200. In view of this, the packaging film 300 may have an elongation of, for example, 20% to 200%, 30% to 180%, 50% to 180%, or 80% to 150%.

The method of measuring the tensile modulus, tensile strength and elongation is not limited. For example, the tensile modulus and tensile strength may be measured according to the tensile tester commonly used in the field of film production. In the case of elongation, for example, in the tensile tester, the initial gage distance of the film 300 is A, and the gage distance at the time of breaking after stretching is B, and the equation [Elongation ( %) = (AB) / A x 100].

In addition, the packaging film 300 may have a small deformation rate for firm support, fixing force, and / or durability. According to the sixth embodiment of the present application, the packaging film 300 may have a strain E according to Equation 4 below being 5% or less.

[Equation 4]

E (%) = [(L2-L1) / L1] x 100

In Equation 4, L1 is the initial length (horizontal or vertical) of the packaging film 300, L2 is the packaging film 300 after being left for one day (24 hours) while applying a load of 3kg at a temperature of 80 ℃ Is an elongated length of.

As mentioned above, when the display device is installed on the wall, the display device may be installed in a form inclined about 10 degrees with the wall. In this case, when the strain E of the packaging film 300 according to Equation 4 exceeds 5%, it may sag downward or protrude forward by the load of the display device. In view of this point, the strain E of the packaging film 300 is preferably 5% or less. The packaging film 300 is more specifically, for example, 4% or less, 3.5% or less, 3.2% or less, 3% or less, 2.5% or less, 2% or less, 1.5% or less, or 1% or less strain (E). Can have The strain E of the packaging film 300 is closer to zero (zero).

The packaging film 300, in one example, based on the size of 60mm x 25mm (width x length), when left for one day (24 hours) while applying a load of 3kg at a temperature of 80 ℃, horizontal ( The degree of stretching in the longitudinal) direction or in the longitudinal (width) direction may be selected from a film having 2 mm or less.

In addition, the packaging film 300 is a breakdown strength, for example, the number of cut-offs (MIT) measured by the test specified in JIS P8115, for example, 200 or more, 300 or more, or 400 or more times It can have

In addition, referring to FIG. 5, an overlap prevention processor 360 may be formed in the third region 330 according to the seventh embodiment of the present application. That is, when the third region 330 is bent to be attached to the rear surface 203 of the rear element 200, the overlapping prevention part is disposed on the third region 330 so that adjacent third regions 330 do not overlap each other. 360 may be formed.

The overlap prevention processor 360 may be selected from, for example, a cutout 361 cut at a predetermined angle θ. In this case, the angle θ of the cutting part 361 may be, for example, 15 degrees to 85 degrees, or 30 degrees to 60 degrees. For example, the angle θ of the cutout 361 may be 30 degrees or more, or 45 degrees or more. By the cutting part 361, overlapping with the adjacent third region 330 may be prevented. In the present application, the angle θ of the cutout portion 361 is based on the extension line a extending in the linear direction in the second region 320 as shown in FIG. It means the inclination angle of the side of the three region 360.

In FIG. 7, another embodiment of the overlap prevention processing unit 360 is illustrated. Referring to FIG. 7, the overlap prevention processing unit 360 may be selected from the cutting unit 362 cut and removed to a predetermined length L. Referring to FIG. In this case, the length L of the cutting part 362 may be greater than or equal to, for example, the width W ₃₃₀ of the adjacent third region 330. The cutting part 362 may also prevent overlapping with the adjacent third region 330.

According to an exemplary embodiment, of each of the

regions

310, 320, 330, at least the first region 310 may have a light transmittance (transparency). The first region 310 may have, for example, light transmittance of 80% or more, and for example, light transmittance of 90% or more. In this case, it is advantageous at the time of packaging the optical element 200A.

In addition, according to the eighth embodiment of the present application, in the second region 320 and the third region 330, at least the second region 320 may have light impermeability. That is, the second region 320 has a light impermeability to prevent light leakage to the side. For example, the second region 320 may have a light transmittance of 10% or less, 5% or less, 1% or less, 0.1% or less, or 0%. In the present application, light impermeability includes the meaning of light blocking to block light, and / or reflective property to reflect light. For this light impermeability, at least the second region 320 may include one or more light leakage preventing layers selected from, for example, light blocking layers and reflective layers. In addition, the third region 330 may optionally have the above light impermeability.

For example, the light blocking layer may be formed by coating a light blocking material on the second region 320. In addition, the reflective layer may be formed, for example, by coating a reflective material on the second region 320. In the present application, 'coating' includes a general coating, for example, a coating method such as printing or deposition, as well as a general coating such as bar coating or spray coating. .

Each material constituting the light shielding layer and the reflective layer is not particularly limited. As the light-shielding material, a material having a color such as black color may be used, and specific examples include inorganic materials selected from carbon black, graphite, iron oxide, azo pigments and / or phthalocyanine pigments, and the like. Light blocking materials, such as an organic substance, are mentioned. The reflective material may be, for example, a reflective material such as metal and metal oxide selected from aluminum, titanium, silica, alumina, and / or titania. Such light-shielding and reflective materials can be combined with, for example, binders and / or solvents and coated by a printing process. And in the case of the metal and metal oxide for reflectivity may be coated by deposition (deposition).

Referring to FIG. 8, according to the ninth embodiment of the present application, a light impermeable processor 314 may be formed at an edge of the first region 310. Specifically, as shown in FIG. 8, the first region 310 has a light transmissive (transparent) main region 312, and the light-transparent processing unit 314 is formed along the circumference of the main region 312. Can be formed. The light impermeable processing unit 314 may be light impermeable (light leakage preventing ability). The light impermeable processing unit 314 may be selected from, for example, a printed layer formed by printing the light impermeable paint. In addition, the light impermeable processing unit 314 may be selected from the light shielding layer and the reflective layer as described above. For example, the light impermeable treatment unit 314 may be formed by coating a light blocking material (colored material) such as inorganic and organic materials selected from carbon black, graphite, iron oxide, azo pigments, and phthalocyanine pigments.

As described above, when the light impermeable processor 314 is formed at the magnetic field of the first region 310, the light leakage to the side may be completely blocked. Although the second region 320 has light impermeability to prevent light leakage to the side, for example, when bending the packaging film 300, the second region 320 does not exactly bend at the boundary lines C1 and C2, and in some cases, a tolerance May be generated and light leakage may occur laterally. In addition, in the process of packaging the packaging film 300, the first region 310 is biased to one side so that the edge of the first region 310 is located at the side surface 202 of the optical device 200A, so that light leakage is caused to the side surface. Can happen. In this case, the light impermeable processing unit 314 may block the light to completely block the light leakage to the side.

The width W ₃₁₄ and the thickness of the light-transparent processing unit 314 are not particularly limited. The width W ₃₁₄ may be, for example, 0.01 mm or more. In this case, when the width W ₃₁₄ is less than 0.01 mm, the tolerance prevention function may be insignificant. The upper limit is not particularly limited, but if the width W ₃₁₄ is too large, the screen may be overly obscured, for example, 10 mm or less is preferable. In consideration of this point, the light-transmitting treatment unit 314 may have, for example, a width W ₃₁₄ of 0.02 mm to 5 mm, and more specifically, may have a width W ₃₁₄ of 0.03 mm to 3 mm, for example. have. In addition, the area of the light impermeable processing unit 314 may be, for example, 0.01 to 5%, more specifically, 0.5 to 2% of the total area of the first region 310. In addition, the thickness of the light impermeable treatment unit 314 may be, for example, 200 μm or less, for example, 0.01 μm to 200 μm, or 0.02 μm to 100 μm.

Referring to FIG. 9, according to the tenth embodiment of the present application, the first region 310 may be provided with a protrusion 315 in which the second region 320 is not extended. Specifically, as shown in FIG. 9, the second region 320 extends from the first region 310, but does not extend from the vertex 310a of the first region 310 to have a step 316. The extension is formed, the first region 310 may be provided with a protrusion 315. That is, the vertex 310a of the first region 310 may protrude.

When the protrusion 315 is provided as described above, that is, when the protrusion 315 in which the second region 320 is not extended is provided in the first region 310, stress is generated when the second region 320 is bent. ) Can be prevented. Although it may vary depending on the mechanical properties and thickness of the packaging film 300, as shown in FIG. 5, when there is no protrusion 315 from which the vertex 310a protrudes, the first region 310 is folded when the second region 320 is folded. Stress is applied to the vertex 310a of the) and thus a lifting phenomenon may occur near the vertex 310a. However, when the protrusion 315 is provided as above, the lifting phenomenon as described above may be prevented.

2 to 4, the packaging film 300 as described above is attached and fixed to the display panel 100 through the adhesive layer 400.

According to the eleventh embodiment of the present application, the front surface of the packaging film 300 can be easily surface treatment. In detail, an easy-to-attach surface treatment part may be formed on at least the entire surface of the first region 310, that is, the surface contacting the pressure-sensitive adhesive layer 400 (upper surface in the drawing). In the present application, the easy attachment surface treatment is not limited as long as it can improve the adhesion between the packaging film 300 and the pressure-sensitive adhesive layer 400. By such easy attachment surface treatment, the adhesion at the contact interface of the packaging film 300 and the pressure-sensitive adhesive layer 400 is improved, which in turn increases the fixing force between the display panel 100 and the packaging film 300.

The easy attachment surface treatment may be, for example, at least one selected from corona treatment, primer treatment, and the like. The manner of the corona treatment and the primer treatment is not particularly limited, and they can apply any known method for improving adhesion in the film processing field. For example, the primer treatment may be a method of forming a primer layer by coating a primer such as acrylic, urethane and epoxy. And the primer layer, for example, may have a thickness of 0.01 to 50㎛.

In addition, according to the twelfth embodiment of the present application, the back surface of the packaging film 300 may have an uneven surface. Specifically, an uneven surface may be formed on at least the rear surface of the first region 310, that is, the surface contacting the rear element 200 (the lower surface in the drawing). By the uneven surface, after packaging, the fusion between the first region 310 and the back element 200 can be prevented. More specifically, referring to FIG. 3, fusion between the back surface (lower surface in the drawing) of the first region 310 and the front surface (upper surface in the drawing) of the brightness enhancement film 230 may be prevented.

The uneven surface may be formed in various ways, for example, it may be formed through a mat treatment and a haze treatment. Through this treatment, the uneven surface may have a roughness, for example, an RMS roughness of 0.1 μm or more, 0.5 μm or more, or 1.0 μm or more. For example, the surface may be 0.1 μm to 10 μm, 0.5 μm to 8 μm, or 1.0 μm to 5 μm. In addition, the uneven surface may have a haze of 80% or less, or 70% or less. Specific examples may be cotton having a haze of about 40% to 80% or about 50% to 70%.

In some cases, the uneven surface may be a high hardness surface having a high hardness, for example, a pencil hardness of 1B or more, or 2B or more. For example, the surface may have a pencil hardness of about 1B to 4B, or about 2B to 4B.

When the uneven surface has roughness (RMS roughness) and / or connection hardness in the range as exemplified above, fusion of the first region 310 and the back element 200 can be effectively prevented.

In addition, the said uneven surface can be formed using another resin layer, for example. For example, in the process of forming the resin layer includes a bead to form the uneven surface by transferring the uneven shape by the imprinting process or the frame, or to form the uneven surface in the resin layer of an appropriate thickness. Uneven surface can be formed in a manner to make.

The resin layer may include, for example, a room temperature curing type, a moisture curing type, a thermosetting type, or a photocurable resin composition in a cured state. In one example, the resin layer may include a thermosetting or photocurable resin composition, or a photocurable resin composition in a cured state. The above-mentioned temperature-curable, moisture-curable, thermosetting or photo-curable resin composition means a resin composition in which the cured state is induced at room temperature or may be induced by application of heat or irradiation of active energy rays in the presence of appropriate moisture. can do.

For example, the resin composition may contain an acrylic compound, an epoxy compound, a urethane compound, a phenol compound, a polyester compound, or the like as a main material. In the above, the "compound" may be a monomeric, oligomeric or polymeric compound.

As another example, as the resin composition, an acrylic resin composition excellent in optical properties such as transparency and excellent in resistance to yellowing and the like, for example, a photocurable acrylic resin composition can be used. The photocurable acrylic composition may include, for example, an active energy ray polymerizable polymer component and a monomer for reactive dilution.

The polymer component in the above includes components known in the art as so-called active energy ray polymerizable oligomers such as urethane acrylate, epoxy acrylate, ether acrylate or ester acrylate, or monomers such as (meth) acrylic acid ester monomers and the like. Polymerized mixtures can be exemplified. As the (meth) acrylic acid ester monomer, alkyl (meth) acrylate, (meth) acrylate having an aromatic group, heterocyclic (meth) acrylate or alkoxy (meth) acrylate and the like can be exemplified.

As the monomer for reactive dilution, which may be included in the photocurable acrylic composition, a monomer having one or two or more photocurable functional groups such as acryloyl group or methacryloyl group may be exemplified. As the monomer for reactive dilution, for example, the (meth) acrylic acid ester monomer or polyfunctional acrylate may be used.

The selection of the above components or the blending ratio of the selected components for preparing the photocurable acrylic composition is not particularly limited and may be adjusted in consideration of the hardness and other physical properties of the desired resin layer.

In the process of forming the resin layer using the resin composition, an uneven surface may be formed by forming irregularities in the resin layer or by including beads in the resin layer. In this case, when the beads are included, the beads may have a refractive index that is different from or substantially equal to that of the resin layer. When the beads have a refractive index different from that of the resin layer, a side effect of inducing light diffusion through the resin layer can also be obtained.

The shape of the beads contained in the resin layer is not particularly limited, and may be, for example, spherical, elliptical, polyhedral, amorphous or other shapes. Specific types of beads may be exemplified by various inorganic or organic beads. Examples of the inorganic beads include silica, amorphous titania, amorphous zirconia, indium oxide, alumina, amorphous zinc oxide, amorphous cerium oxide, barium oxide, calcium carbonate, amorphous barium titanate or barium sulfate, and the like. As the beads, particles including a crosslinked or uncrosslinked material of an organic material such as an acrylic resin, a styrene resin, a urethane resin, a melamine resin, a benzoguanamine resin, an epoxy resin, or a silicone resin may be exemplified, but are not limited thereto. .

In addition, the method of forming an uneven surface in a resin layer without using a bead is not particularly limited. For example, the concave-convex surface may be realized by curing the resin composition in the state of contacting the coating layer of the resin composition with a mold having a desired concave-convex structure, or by imprinting.

In some cases, the resin layer may be formed such that the resin layer has a high hardness so that the resin layer serves as a high hardness layer. In this case, the hardness of the resin layer can be adjusted to have a pencil hardness in the above-described range, for example.

In the present application, the pressure-sensitive adhesive layer 400 may be formed between the display panel 100 and the packaging film 300, and may be attached and fixed thereto. The pressure-sensitive adhesive layer 400 may be formed by, for example, coating the packaging film 300, that is, coating the first region 310 of the packaging film 300. In addition, the adhesive layer 400 may be formed by coating on the display panel 100, for example, on the rear polarizer 160. For another example, the pressure-sensitive adhesive layer 400 may be formed by a transfer method. That is, the pressure-sensitive adhesive layer 400 may be formed on the display panel 100 or the packaging film 300 after being coated on a separate release film. The pressure-sensitive adhesive layer 400 may be transparent, for example, light transmittance of 80% or more.

The pressure-sensitive adhesive layer 400 may be formed from the pressure-sensitive adhesive composition. At this time, the pressure-sensitive adhesive composition may be exemplified as follows. The pressure-sensitive adhesive composition exemplified below may be applied to the pressure-sensitive adhesive layer 400 as well as to the second pressure-sensitive adhesive layer. Specifically, the pressure-sensitive adhesive composition exemplified below may be formed between the packaging film 300 and the rear element 200 as well as the pressure-sensitive adhesive layer 400 formed between the display panel 100 and the packaging film 300. It can also be applied to the second adhesive layer for promoting adhesion of the liver.

In the present application, the pressure-sensitive adhesive composition includes, for example, photocurable and / or thermosetting. The pressure-sensitive adhesive composition may include, for example, a monomer and / or a polymer component. The monomer and the polymer component may form a base of the pressure-sensitive adhesive layer through a curing process. In the present application, the term "polymer" refers to a compound in a form in which two or more monomers are polymerized, which means, for example, a component commonly referred to as an oligomer. In the manufacture of pressure sensitive adhesives, the monomers and polymer components used to form the pressure sensitive adhesive composition are variously known, and these components can be used without limitation. The monomer and the polymer include, for example, acrylic, urethane, and / or epoxy.

In the thermosetting adhesive composition, the monomer and the polymer component may be, for example, an acrylic monomer or an acrylic polymer having a crosslinkable functional group. As the acrylic polymer, for example, a polymer having a weight average molecular weight (Mw) of about 1.5 million or more and a glass transition temperature of about -24 ° C to -16 ° C can be used. The specific kind of such a polymer is not particularly limited, and polymerized polymers commonly used as adhesive resins, for example, (meth) acrylic acid alkyl esters and copolymerizable monomers capable of providing crosslinkable functional groups in the side chains or ends of the polymers Acrylic polymers can be used that contain a modified form. Specific examples of the (meth) acrylic acid alkyl esters include alkyl groups having 1 to 14 carbon atoms such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate or ethylhexyl (meth) acrylate. An alkyl (meth) acrylate etc. which have a branch are mentioned. As the polymerizable monomer, a monomer having a copolymerizable functional group such as an ethylenic double bond and a crosslinkable functional group such as a hydroxy group, a carboxyl group, an epoxy group, an isocyanate group or an amide group and the like in the molecule can be used.

The weight ratio of each monomer included in the acrylic polymer having a crosslinkable functional group is not particularly limited, and may be adjusted in consideration of initial adhesive force, adhesive force, cohesion force, and the like of the desired adhesive layer. In addition, in the acrylic polymer, if necessary, various copolymerizable monomers other than those described above may also be included in a polymerized form. The polymer may be prepared by conventional polymerization methods in the art, such as solution polymerization, photo polymerization, bulk polymerization, suspension polymerization or emulsion polymerization. It can be produced by such a method.

The thermosetting adhesive composition may further include a polyfunctional crosslinking agent capable of crosslinking the polymer together with the acrylic polymer. In this case, the kind of specific crosslinking agent is not specifically limited, For example, well-known crosslinking agents, such as an isocyanate type crosslinking agent, an epoxy type crosslinking agent, an aziridine type crosslinking agent, and a metal chelate crosslinking agent, can be used. In addition, the ratio of the crosslinking agent in the composition is not particularly limited, and may be appropriately adjusted in consideration of the desired cohesion force and the like.

The pressure-sensitive adhesive composition may be a photocurable pressure-sensitive adhesive composition according to one embodiment. In the present application, the term photocurable pressure-sensitive adhesive composition refers to a composition in which a curing process is induced by light irradiation, that is, radiation of electromagnetic waves, and is converted into an adhesive. The electromagnetic wave may be microwave, infrared (IR), ultraviolet (UV) light, X-ray, gamma ray or alpha-particle beam, proton beam, neutron beam and electron beam. It is used to mean a particle beam such as an electron beam.

In the photocurable pressure sensitive adhesive composition, the monomer and the polymer component may include a photocurable oligomer and / or a monomer for reactive dilution. The photocurable oligomer may include all oligomer components used in the manufacture of a photocurable pressure-sensitive adhesive composition such as ultraviolet curable. For example, the oligomer may include urethane acrylate obtained by reacting a polyisocyanate having two or more isocyanate groups and a hydroxyalkyl (meth) acrylate in the molecule; Ester acrylates obtained by dehydration condensation of polyester polyols and (meth) acrylic acid; Ester urethane acrylate in which an ester urethane resin reacted with a polyester polyol and a polyisocyanate is reacted with hydroxyalkyl acrylate; Ether acrylates such as polyalkylene glycol di (meth) acrylate and the like; Ether-based urethane acrylates in which an ether-based urethane resin obtained by reacting a polyether polyol and a polyisocyanate with hydroxyalkyl (meth) acrylate is reacted; Or an epoxy acrylate to which an epoxy resin and (meth) acrylic acid are added and reacted, but is not limited thereto.

As the monomer for reactive dilution, any monomer having a reactive functional group such as a (meth) acryloyl group in the molecular structure can be used without particular limitation. Such monomers may serve to adjust the viscosity of the composition and to implement adhesion after curing. As such a monomer, Alkyl (meth) acrylate; Hydroxy group-containing monomers such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate or hydroxybutyl (meth) acrylate; Carboxyl group-containing monomers such as (meth) acrylic acid or beta-carboxyethyl (meth) acrylate; Alkoxy group-containing monomers such as 2- (2-ethoxyethoxy) ethyl (meth) acrylate and the like; Aromatic group-containing monomers such as benzyl (meth) acrylate or phenoxyethyl (meth) acrylate; Heterocyclic moieties containing monomers such as tetrahydrofurfuryl (meth) acrylate or (meth) acryloyl morpholine; Or polyfunctional acrylate, and the like, but is not limited thereto.

Specific types and blending ratios of the photocurable oligomer and the reactive diluent monomer are not particularly limited and may be appropriately selected in consideration of the viscosity of the desired composition and the adhesive properties to be implemented after curing.

In another example of the photocurable pressure-sensitive adhesive composition, the monomer or polymer component may be a photocurable syrup. The photocurable syrup may be a monomer mixture comprising a (meth) acrylic acid ester monomer such as alkyl (meth) acrylate or the like or a partial polymer thereof.

As (meth) acrylic acid ester contained in a monomer mixture, it is the alkyl (meth) acrylate which has a C1-C14 linear or branched alkyl group mentioned above, for example, methyl (meth) acrylate, ethyl (Meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, sec-butyl (meth) acrylate, Pentyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate , Isononyl (meth) acrylate, lauryl (meth) acrylate, tetradecyl (meth) acrylate, and the like, or copolymerizable monomers or other copolymerizable monomers capable of providing the aforementioned crosslinkable functional groups, for example , Oligomers described above, monomers for reactive dilution and the like can be exemplified.

When the pressure-sensitive adhesive composition contains, as the syrup, a partial polymer of the monomer mixture described above, the polymerization rate or the conversion rate of the monomer mixture is not particularly limited. For example, the polymerization rate or the conversion rate can be controlled in consideration of process efficiency, desired adhesive properties, and the like.

As another example of a photocurable adhesive composition, there exists an adhesive composition which can form the adhesive layer containing what is called an interpenetrating polymer network (Hereinafter, it may be called "IPN."). In the present application, the term “IPN” may refer to a state in which at least two or more crosslinked structures exist in the pressure-sensitive adhesive layer, and in one example, the crosslinked structures may be entangled with each other, or linked with each other. It may be in a penetrating state. When the pressure-sensitive adhesive layer includes an IPN, the pressure-sensitive adhesive layer excellent in durability under severe conditions and excellent in workability, light leakage preventing ability, and the like can be realized.

In the pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer including the IPN structure, the polymer component may be an acrylic polymer. In this case, the acrylic polymer that can be used may be exemplified by the acrylic polymer used in the above-mentioned thermosetting adhesive composition. The photocurable pressure-sensitive adhesive composition may further include the polyfunctional crosslinking agent and the photocurable polyfunctional compound mentioned in the above-mentioned thermosetting pressure-sensitive adhesive composition together with the acrylic polymer. The photocurable multifunctional compound may mean a compound including two or more functional groups that can be polymerized by light irradiation. The pressure-sensitive adhesive layer formed by such a composition may include, for example, a crosslinked structure comprising an acrylic polymer crosslinked by a multifunctional crosslinking agent and a crosslinked structure comprising the polymerized polyfunctional compound.

As a photocurable polyfunctional compound, polyfunctional acrylate can be used, for example. As the polyfunctional acrylate, any compound having two or more (meth) acryloyl groups in the molecule can be used without limitation. For example, 1, 4- butanediol di (meth) acrylate, 1, 6- hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethyleneglycol di (meth) acrylate, neopentyl Neopentylglycol adipate di (meth) acrylate, hydroxyl puivalic acid neopentylglycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dish Clopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate, di (meth) acryloxy ethyl isocyanurate, allylated cyclohexyl di (meth) acrylate, tricyclodecane Dimethanol (meth) acrylate, dimethylol dicyclopentane di (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclodecane dimethanol (meth) acrylate Neopentyl glycol modified trimethylpropane di (meth) acrylate, adamantane di (meth) acrylate or 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene difunctional acrylates such as (fluorine) and the like; Trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethyl isocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; 5-functional acrylates, such as propionic acid modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (ex. Isocyanate monomers and trimethylolpropane tri (meth) acrylate Six functional acrylates, such as a reactant, etc. can be used, In some cases, it is known as a photocurable oligomer in this field, and various urethane acrylates, polycarbonate acrylates, polyester acrylates, polyether acrylates Or epoxy acrylate may be used.

The proportion of the acrylic polymer, the crosslinking agent, the photocurable polyfunctional compound, and the like in the pressure-sensitive adhesive composition is not particularly limited and may be controlled by the physical properties of the desired pressure-sensitive adhesive.

The pressure-sensitive adhesive composition may include a radical initiator such as a photoinitiator or a thermal initiator in addition to each component described above, and may include a conventional photo radical initiator. As the radical radical initiator, any radical can be generated by irradiation of electromagnetic waves and a curing reaction can be initiated without particular limitation. The ratio of the radical initiator is not particularly limited, and may be selected within a range in which an appropriate curing reaction of the photocurable components included in the composition can be induced.

In addition, the pressure-sensitive adhesive composition, if necessary, add one or more additives selected from the group consisting of a silane coupling agent, a tackifying resin, an epoxy resin, a curing agent, an ultraviolet stabilizer, an antioxidant, a colorant, a reinforcing agent, a filler, an antifoaming agent, a surfactant, and a plasticizer. It can be included as.

The manner of forming the pressure-sensitive adhesive layer using the pressure-sensitive adhesive composition as described above is not particularly limited. In the process of forming the pressure-sensitive adhesive layer may be a curing process through the application of heat and / or irradiation of light, this curing process attaches the packaging film 300 and the adherend through the pressure-sensitive adhesive layer, that is, for example, packaging film Attaching the display panel 300 and the display panel 100 may be performed thereafter. In addition, the conditions for applying heat and the conditions for irradiating light are not particularly limited, and for example, may be performed under conditions capable of securing the properties of the desired pressure-sensitive adhesive layer. Irradiation of light can be performed using a means, such as a high pressure mercury lamp, an electrodeless lamp, or a xenon lamp, for example. And the illuminance at the time of light irradiation is controlled in the range of 50 mW / cm ² to 2,000 mW / cm ² , for example, and the amount of light is controlled in the range of 10 mJ / cm ² to 1,000 mJ / cm ² , for example. However, it is not limited thereto.

The adhesive layer 400 is formed between at least the display panel 100 and the first region 310. At this time, in some cases, the pressure-sensitive adhesive layer 400 may require a resistance that can correspond to the external force.

For example, in high temperature and / or high humidity conditions, a wave may be generated between the first region 310 and the second region 320 of the packaging film 300. More specifically, in the case of the first region 310, the adhesive layer 400 is attached and restrained so that there is no shrinkage expansion. However, in the case of the second region 320, the shrinkage expansion may occur under high temperature and / or high humidity conditions. . Due to the contraction and expansion of the second region 320, a wave is generated between the first region 310 and the second region 320, and the first region 310 is caused by the wave. Stress may be generated at the edge of. At this time, in some cases, a lifting phenomenon may occur between the first region 310 and the pressure-sensitive adhesive layer 400 due to the stress.

In addition, although the display panel 100 and the back element 200 may be different, for example, when the weight of the display panel 100 and the back element 200 is large, the pressure-sensitive adhesive layer 400 resists shear force. You should be able to. That is, the pressure-sensitive adhesive layer 400 should not be pushed to secure the cohesive force that can resist the shear force applied by the load of the display panel 100 and the rear element 200. In consideration of this, the pressure-sensitive adhesive layer 400 may be selected from the first embodiment, the second embodiment and the third embodiment described below.

(1) First embodiment of pressure-sensitive adhesive layer

According to the first embodiment, the pressure-sensitive adhesive layer 400 may have a storage modulus of 6.0 × 10 ⁵ dyne / cm 2 or more. That is, the pressure-sensitive adhesive layer 400 is formed by curing the pressure-sensitive adhesive composition, it is preferable that the storage modulus measured at room temperature after the curing is 6.0 x 10 ⁵ dyne / ㎠ or more. The room temperature storage modulus in the present application is based on a conventional measuring method, which may be, for example, a value measured through a dynamic viscoelasticity measuring instrument. As used herein, the term ambient temperature is a naturally occurring temperature that is warmed or undecreased, which may vary depending on the season, but is, for example, about -10 ° C to 50 ° C, about 5 ° C to 40 ° C, about 10 ° C to 30 ° C. Or about 15 ° C to 25 ° C.

When the pressure-sensitive adhesive layer 400 has a room temperature storage modulus of 6.0 x 10 ⁵ dyne / cm 2 or more, it may have a resistance to external force. That is, stress caused by shrinkage expansion under high temperature and / or high humidity conditions may be absorbed to prevent lifting of the first region 310 and the pressure-sensitive adhesive layer 400. Along with this, cohesion force that can cope with the shear force is secured and not pushed. At this time, when the room temperature storage elastic modulus of the pressure-sensitive adhesive layer 400 is less than 6.0 x 10 ⁵ dyne / cm 2, the pressure-sensitive adhesive layer 400 becomes soft and stress due to shrinkage expansion of the second region 320 is Although absorbing, the cohesion force corresponding to the shear force due to the load of the display panel 100 and the rear element 200 may be lowered.

Since the room temperature elastic modulus is advantageous as the numerical value is higher, the upper limit is not particularly limited. However, when the room temperature elastic modulus is too high, in some cases, the absorptivity to stress may be lowered, and thus lifting may occur, for example, 1.0 x 10 ⁸ dyne / cm 2 or less.

In addition, in one example, the pressure-sensitive adhesive layer 400 may include an adhesive resin having a weight average molecular weight (Mw) of 1 million or more. When the pressure-sensitive adhesive layer 400 includes a weight average molecular weight (Mw) of 1 million or more high molecular weight adhesive resin, it is advantageous in improving cohesion. In improving the cohesion force, that is, improving cohesion force that can cope with the shear force, a method of increasing the degree of crosslinking of the adhesive resin through a curing agent may be considered. However, when the crosslinking degree of the adhesive resin is too high by using an excessive amount of the curing agent, cohesive force may be improved, but absorption of stress due to shrinkage and expansion of the second region 320 may be lowered, and thus lifting may occur.

Therefore, when the weight average molecular weight (Mw) is used as the adhesive resin, a high molecular weight of 1 million or more, the cohesion of the pressure-sensitive adhesive layer 400 can be improved even if the crosslinking degree is low even if not crosslinked by the curing agent or by using a small amount of the curing agent. Can be. In consideration of this, the adhesive resin may have a weight average molecular weight (Mw) of 1.2 million or more. Since the higher the weight average molecular weight (Mw) of the pressure sensitive adhesive is, the upper limit is not particularly limited, but it may be, for example, 5 million or less. The kind of the adhesive resin is as described above, and may be selected from, for example, an acrylic polymer as exemplified above.

In addition, when using a curing agent, that is, when the pressure-sensitive adhesive resin and the curing agent is included in the composition as an adhesive composition of the pressure-sensitive adhesive layer 400, the content of the curing agent may be 0.001 to 10 parts by weight based on 100 parts by weight of the adhesive resin. And the pressure-sensitive adhesive resin, the crosslinking degree by the curing agent may be 80% or less, for example, 2% to 80%. At this time, when the content of the curing agent and the degree of crosslinking are greater than the above ranges, absorption of stress may be lowered and thus lifting may occur. In consideration of this, the pressure-sensitive adhesive layer 400 includes an adhesive resin and a curing agent, the content of the curing agent may be 0.002 to 5 parts by weight, or 0.01 to 0.5 parts by weight based on 100 parts by weight of the adhesive resin. And the pressure-sensitive adhesive resin may be, for example, 5% to 70%, 10% to 65%, or 20% to 60% crosslinking degree by the curing agent.

According to the first embodiment, the pressure-sensitive adhesive layer 400 satisfies the room temperature storage modulus, the weight average molecular weight (Mw), and / or the degree of crosslinking, and the like, and the adhesion area with the packaging film 300 at room temperature or 80 ° C. When a vertical load of 1 kgf is applied to 25 mm x 25 mm (width x length) for 4 hours, the pushed distance may have a cohesive force of 1 mm or less. The pushed distance may be, for example, 0.001 to 1 mm.

(2) Pressure Sensitive Adhesive Layer 2 Embodiment

According to the second embodiment, the adhesive layer 400 may have a peel force (adhesive force) of 0.8 kgf / cm or more when peeled at a peel rate of 30 mm / min at room temperature with respect to the packaging film 300.

When the pressure-sensitive adhesive layer 400 has the above peeling force (adhesive force), the adhesive layer is strongly adhered at the contact surface with the packaging film 300, and due to the wave due to the shrinkage expansion of the second region 320. Lifting can be prevented. In addition, the display panel 100 and the rear element 200 are not pushed against the shear force caused by the load.

In the present application, the peel force (adhesive force) is based on the conventional peel force measurement method in the adhesive field, which may be, for example, a value measured at 180 degree peel strength. The upper limit of the peel force (adhesive force) is not particularly limited, and may be, for example, 5.0 kgf / cm or less. In addition, the pressure-sensitive adhesive layer 400 may have a room temperature storage modulus of 6.0 x 10 ⁵ dyne / cm 2 or more while having the above peeling force.

In addition, in one example, the pressure-sensitive adhesive layer 400 may include an acrylic copolymer as an adhesive resin, but may have a weight average molecular weight (Mw) of 1 million or more as described above. In this case, the acrylic copolymer may contain 0.1 to 10 parts by weight of the crosslinking monomer with respect to 90 to 99.9 parts by weight of the (meth) acrylic acid ester monomer having an alkyl group.

The specific kind of the (meth) acrylic acid ester monomer contained in the said acryl-type copolymer is not specifically limited. At this time, since the cohesion force may fall when the alkyl group contained therein becomes too long, it is preferable to use a monomer having an alkyl group having 1 to 12 carbon atoms in view of maintaining cohesion force at high temperature and / or high humidity conditions. Examples of such monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl ( Meth) acrylate, sec-butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, And at least one selected from the group consisting of isooctyl (meth) acrylate and isononyl (meth) acrylate.

In addition, the (meth) acrylic acid ester monomer is preferably included in the amount of 90 to 99.9 parts by weight in the acrylic copolymer, when less than 90 parts by weight, there is a fear that the initial adhesive strength of the pressure-sensitive adhesive is lowered, exceeding 99.9 parts by weight In this case, cohesion may be lowered.

In addition, the crosslinking monomer contained in the acrylic copolymer is not particularly limited as long as it contains a crosslinkable functional group, which is, for example, at least one selected from the group consisting of hydroxy group-containing monomers, carboxyl group-containing monomers and nitrogen-containing monomers. Can be used. Such a crosslinking monomer can give cohesion force and adhesive strength so that the cohesive force breakdown of an adhesive may not arise in high temperature and / or high humidity conditions, for example by forming a crosslinked structure by reacting with a crosslinking agent.

As an example of the crosslinking monomer, the hydroxy group-containing monomer may be 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl One or more selected from (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, 2-hydroxypropylene glycol (meth) acrylate, and the like; The carboxyl group-containing monomer may be one or more selected from (meth) acrylic acid, acrylic acid duplex, itaconic acid, maleic acid, maleic anhydride, fumaric acid and the like; The nitrogen-containing monomer may be at least one selected from acryl amide, N-vinylpyrrolidone, N-vinyl caprolactone and the like.

The crosslinking monomer may be included in the acrylic copolymer in an amount of 0.1 to 10 parts by weight, wherein when the content of the crosslinking monomer is less than 0.1 parts by weight, cohesive failure may occur under high temperature and / or high temperature and high humidity conditions, and may exceed 10 parts by weight. In this case, stress relief due to occurrence of surface transition phenomena due to reduced compatibility, reduced flow characteristics and / or increased cohesion may be reduced.

In addition, the acrylic copolymer may further contain a copolymer monomer. The copolymerized monomer may be added for the purpose of controlling the glass transition temperature and providing other functionalities. Such copolymerized monomers include nitrogen-containing monomers such as acrylonitrile, (meth) acrylamide, N-methyl (meth) acrylamide and / or N-butoxy methyl (meth) acrylamide and the like; Styrene monomers such as styrene and / or methyl styrene; Glycidyl (meth) acrylate; And one or more selected from vinyl acetate and the like, but is not limited thereto.

In this case, the copolymer monomer is preferably contained in 40 parts by weight or less based on 90 to 99.9 parts by weight of the (meth) acrylic acid ester monomer. When content of a copolymerization monomer exceeds 40 weight part, there exists a possibility that the softness | flexibility and / or peeling force of an adhesive composition may fall.

According to a more specific exemplary embodiment, the pressure-sensitive adhesive layer 400 includes an acrylic copolymer as an adhesive resin, wherein the acrylic copolymer is based on 50 to 99 parts by weight of the (meth) acrylic monomer having 4 to 12 carbon atoms. 5 to 40 parts by weight of methyl (meth) acrylate; 5 to 40 parts by weight of the copolymer monomer; And 0.1 to 1.0 parts by weight of the crosslinking monomer. The kind of each component which comprises such an acryl-type copolymer is as having illustrated above. In the case of containing the acrylic copolymer thus formed, it is advantageous for improvement of physical properties such as peel force (adhesive force) and / or room temperature storage modulus.

In addition, the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer 400 may further include 0.01 to 10 parts by weight of a crosslinking agent based on 100 parts by weight of the acrylic copolymer, in addition to the acrylic copolymer as described above. The crosslinking agent may react with the crosslinking monomer included in the acrylic copolymer, thereby controlling the adhesive properties of the pressure-sensitive adhesive composition and improving cohesion. The specific kind of such a crosslinking agent is not particularly limited, and as mentioned above, a crosslinking agent such as an isocyanate compound, an epoxy compound, an aziridine compound and / or a metal chelate compound can be used.

At this time, examples of the isocyanate compound include one selected from the group consisting of tolylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isoform diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate, and the like. The above is mentioned; Examples of the epoxy compound include ethylene glycol diglycidyl ether, triglycidyl ether, trimethylolpropane triglycidyl ether, N, N, N ', N'-tetraglycidyl ethylenediamine and glycerine diglycidyl One or more selected from the group consisting of ethers and the like; Examples of the aziridine-based compound include N, N'-toluene-2,4-bis (1-aziridinecarboxide), N, N'-diphenylmethane-4,4'-bis (1-aziridinecar Copyoid), triethylene melamine, bisisoprotaloyl-1- (2-methylaziridine), tri-1-aziridinylphosphine oxide, and the like. In addition, examples of the metal chelate-based compound may be a compound in which a polyvalent metal such as aluminum, iron, zinc, tin, titanium, antimony, magnesium, and / or vanadium is coordinated with acetyl acetone, ethyl acetoacetate, or the like. It is not limited.

In addition, the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer 400 may further include 1 to 100 parts by weight of a tackifying resin with respect to 100 parts by weight of the acrylic copolymer in terms of the control of the adhesive performance. The kind of such tackifying resin is not specifically limited, For example, (hydrogenated) hydrocarbon type resin, (hydrogenated) rosin resin, (hydrogenated) rosin ester resin, (hydrogenated) terpene resin, (hydrogenated) terpene phenol resin, And one or more selected from polymerized rosin resins, polymerized rosin ester resins, and the like. At this time, when the content of the tackifying resin is less than 1 part by weight, the effect of addition may be insignificant. When it exceeds 100 parts by weight, the compatibility and / or cohesion improvement effect may be lowered.

In addition, the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer 400 may further include 0.005 to 5 parts by weight of a silane coupling agent based on 100 parts by weight of the acrylic copolymer. The silane coupling agent may act to improve adhesion stability by improving adhesion stability and heat resistance and moisture resistance, and when left for a long time under high temperature and / or high humidity. The kind of such a silane coupling agent is not specifically limited, For example, (gamma)-glycidoxy propyl trimethoxy silane, (gamma)-glycidoxy propylmethyl diethoxy silane, (gamma)-glycidoxy propyl triethoxy silane, 3-mercaptopropyltrimethoxy silane, vinyltrimethoxy silane, vinyltriethoxy silane, γ-methacryloxypropyltrimethoxy silane, γ-methacryloxypropyltriethoxy silane, γ-aminopropyltrimeth And one or more selected from oxy silane, γ-aminopropyltriethoxy silane, 3-isocyanatepropyltriethoxy silane, γ-acetoacetatepropyltrimethoxy silane, and the like. At this time, when the content of the silane coupling agent is less than 0.005 parts by weight, the effect of the addition thereof may be insignificant. When it exceeds 5 parts by weight, bubbles or peeling phenomenon may occur and durability may be lowered.

In addition, the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer 400 may include a curing agent. At this time, when the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 400, comprising a pressure-sensitive adhesive (for example, acrylic copolymer) and a curing agent, the content of the curing agent may be 0.001 to 10 parts by weight based on 100 parts by weight of the adhesive resin. have. When the content of the curing agent is less than 0.001 part by weight, the effect of improving the cohesive force of the pressure-sensitive adhesive layer 400 according to the addition of the curing agent may be insignificant. When the content of the curing agent is more than 10 parts by weight, the absorption force against stress may be lowered, thereby causing lifting. have. In consideration of this, the pressure-sensitive adhesive layer 400 includes an adhesive resin and a curing agent, the content of the curing agent may be 0.002 to 5 parts by weight, or 0.01 to 0.5 parts by weight based on 100 parts by weight of the adhesive resin.

According to the second embodiment, the pressure-sensitive adhesive layer 400 satisfies the above peeling force (adhesive force), room temperature storage modulus, weight average molecular weight (Mw) and / or crosslinking degree, and the like. When a vertical load of 1 kgf is applied to an attachment area of 25 mm x 25 mm (width x length) for 4 hours with 300), the pushed distance may have a cohesive force of 0.5 mm or less. The pushed distance may be, for example, 0.001 to 0.5 mm.

(3) Third embodiment of pressure-sensitive adhesive layer

According to a third embodiment, the pressure-sensitive adhesive layer 400 includes a photocurable pressure-sensitive adhesive composition, but after light curing, a storage modulus of room temperature is 1.0 × 10 ⁶ dyne / cm 2 or more. That is, the pressure-sensitive adhesive layer 400 is formed by curing the photocurable pressure-sensitive adhesive composition, it is preferable that the storage modulus measured at room temperature after photocuring is 1.0 x 10 ⁶ dyne / ㎠ or more.

When the pressure-sensitive adhesive layer 400 has a room temperature storage modulus of 1.0 × 10 ⁶ dyne / cm 2 or more, it may have a resistance to external force. That is, stress caused by shrinkage expansion under high temperature and / or high humidity conditions may be absorbed to prevent lifting of the first region 310 and the pressure-sensitive adhesive layer 400. Along with this, cohesion force that can cope with the shear force is secured and not pushed. At this time, when the room temperature storage modulus of the pressure-sensitive adhesive layer 400 is less than 1.0 × 10 ⁶ dyne / cm 2, the pressure-sensitive adhesive layer 400 becomes soft and stresses resulting from shrinkage and expansion of the second region 320 are Although absorbing, the cohesion force corresponding to the shear force due to the load of the display panel 100 and the rear element 200 may be lowered.

In addition, in one example, the pressure-sensitive adhesive layer 400 may include an adhesive resin having a weight average molecular weight (Mw) of 1 million or more for the reasons described above. The kind of such an adhesive resin is as described above, and may be selected from, for example, a photocurable acrylic copolymer as exemplified above.

According to an exemplary embodiment, the pressure-sensitive adhesive layer 400 may be formed from a photocurable pressure-sensitive adhesive composition comprising an acrylic copolymer, a multifunctional acrylate capable of photocuring, and a curing agent. In addition, a photoinitiator may be further included as necessary. The kind of each component which comprises such a photocurable adhesive composition is as having illustrated above. By using the photocurable pressure-sensitive adhesive composition, after attaching the display panel 100 and the back element 200, when irradiated with light (UV), the multifunctional acrylate is cured to secure strong adhesive properties.

According to a more specific embodiment, the pressure-sensitive adhesive layer 400 may include 2 to 30 parts by weight of the multifunctional acrylate capable of photocuring, and 0.001 to 10 parts by weight of the curing agent, based on 100 parts by weight of the acrylic copolymer. In addition, if necessary, the photoinitiator may further include 0.001 to 10 parts by weight based on 100 parts by weight of the acrylic copolymer.

According to the third embodiment, the pressure-sensitive adhesive layer 400 satisfies the above-mentioned storage temperature elastic modulus, weight average molecular weight (Mw) and / or crosslinking degree, and the like, and the adhesion area with the packaging film 300 at room temperature or 80 ° C. When a vertical load of 1 kgf is applied to 25 mm x 25 mm (width x length) for 4 hours, the pushed distance may have a cohesive force of 0.2 mm or less.

2 to 4, according to the thirteenth embodiment of the present application, a barrier layer 500 may be formed on the side surface of the display panel 100.

The barrier layer 500 may be capable of blocking at least external moisture from penetrating into the display panel 100. To this end, the barrier layer 500 may have at least moisture impermeability (moisture barrier). In addition, the barrier layer 500 may not only block moisture such as moisture, but may also block penetration of gases such as external air. For this purpose, the barrier layer 500 may have moisture impermeability and It may have gas impermeability.

In the present application, the barrier layer 500 is not particularly limited as long as it has at least moisture barrier property. The barrier layer 50 may include one or more selected from, for example, a moisture barrier resin layer, a metal thin film layer, and a deposition layer.

The moisture barrier resin layer may be, for example, a film layer formed by attaching a moisture barrier resin film to a side surface of the display panel 100, or a resin coating layer coated with a moisture barrier resin composition on the side surface of the display panel 100. Can be. The resin composition constituting such a water barrier resin layer is not limited, and includes a thermosetting type and a photo curing type. In addition, the moisture barrier resin layer may have, for example, a multilayer structure of one layer or two or more layers.

The moisture barrier resin layer may be, for example, a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a polyvinyl chloride resin, a polycarbonate resin, a polyphenylene sulfide resin, Mixtures of hydrocarbons, polyamide resins, acrylate resins, epoxy resins, silicone resins, fluorine resins and / or mixtures thereof.

Examples of the styrene resins include styrene-ethylene-butadiene-styrene block copolymers (SEBS), styrene-isoprene-styrene block copolymers (SIS), and acrylonitrile-butadiene-styrene block copolymers (ABS). , Acrylonitrile-styrene-acrylate block copolymers (ASA), styrene-butadiene-styrene block copolymers (SBS), styrene-based homopolymers and / or mixtures thereof may be exemplified. As the olefin resin, for example, a high density polyethylene resin, a low density polyethylene resin, a polypropylene resin and / or a mixture thereof may be exemplified. As the thermoplastic elastomer, for example, an ester-based thermoplastic elastomer, an olefin-based thermoplastic elastomer, and / or a mixture thereof can be used. Among them, polybutadiene resin and / or polyisobutene resin may be used as the olefinic thermoplastic elastomer. Examples of the polyoxyalkylene resins include polyoxymethylene resins, polyoxyethylene resins, and / or mixtures thereof. Examples of the polyester resins include polyethylene terephthalate resins, polybutylene terephthalate resins, and / or mixtures thereof. As the polyvinyl chloride-based resin, for example, polyvinylidene chloride and the like can be exemplified. Examples of the mixture of the hydrocarbons include hexatriacotane and / or paraffin. As said polyamide resin, nylon etc. can be illustrated, for example. As said acrylate resin, polybutyl (meth) acrylate etc. can be illustrated, for example. As said epoxy resin, For example, Bisphenol-type, such as bisphenol A type, bisphenol F type, bisphenol S type, and these hydrogenated substances; Novolak types such as phenol novolak type and cresol novolak type; Nitrogen-containing cyclic types such as triglycidyl isocyanurate type and hydantoin type; Alicyclic type; Aliphatic type; Aromatic types such as naphthalene type and biphenyl type; Glycidyl types such as glycidyl ether type, glycidyl amine type and glycidyl ester type; Dicyclo types such as dicyclopentadiene type; Ester type; Ether ester type and / or mixtures thereof and the like can be exemplified. Examples of the silicone resins include polydimethylsiloxane and the like. Moreover, as said fluorine-type resin, polytrifluoroethylene resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, polyhexafluoropropylene resin, polyvinylidene fluoride, polyvinylidene fluoride, polyfluoro Ethylene propylene propylene and / or mixtures thereof and the like can be exemplified.

The resins listed as components of the moisture barrier resin layer may be used, for example, grafted with maleic anhydride or the like, or may be copolymerized with monomers for preparing the listed resins, or may be modified with other compounds. It may be. Examples of the other compounds include carboxyl-terminated butadiene-acrylonitrile copolymers.

In addition, the resins listed as components of the moisture barrier resin layer may be functional groups capable of being cured by heat such as glycidyl groups, isocyanate groups, hydroxyl groups, carboxyl groups and / or amide groups and the like so as to be cured and exhibit adhesive properties. Or one or more sites, or for irradiation of active energy rays such as epoxide groups, cyclic ether groups, sulfide groups, acetal groups and / or lactone groups It may include one or more functional groups or sites capable of curing.

According to an exemplary embodiment, the moisture barrier resin layer may include a polyisobutene resin. Polyisobutene resins may have hydrophobicity and exhibit low water vapor permeability and low surface energy. Specifically as a polyisobutene resin, For example, Homopolymer of an isobutylene monomer; And / or a copolymer obtained by copolymerizing an isobutylene monomer with another monomer which can be polymerized. Here, the other monomers polymerizable with the isobutylene monomer may include, for example, 1-butene, 2-butene, isoprene and / or butadiene.

In addition, as the component of the moisture barrier resin layer, a base resin having a weight average molecular weight (Mw) that can be molded into a film shape can be used. According to an exemplary form, the range of the weight average molecular weight (Mw) that can be molded into a film shape may be about 100,000 to 2 million, 100,000 to 1.5 million, or 100,000 to 1 million.

According to another exemplary embodiment, the moisture barrier resin layer may further include a moisture remover in addition to the resin component as described above. Thereby, the moisture barrier property of a moisture barrier resin layer can be improved further. For example, the water scavenger may be present evenly dispersed in the resin layer. Here, the evenly dispersed state may refer to a state in which the water scavenger is present at the same or substantially the same density in any part of the water barrier resin layer.

As said moisture remover, a metal oxide, a sulfate, an organometallic oxide, etc. are mentioned, for example. Here, although not particularly limited, examples of the metal oxide include magnesium oxide, calcium oxide, strontium oxide, barium oxide, aluminum oxide, and the like, and examples of the sulfate include magnesium sulfate, sodium sulfate, nickel sulfate, and the like. Examples of the organometallic oxide include aluminum oxide octylate.

The said water removal agent may use 1 type of the above-mentioned components, and may use 2 or more types. In addition, when using 2 or more types as a water removal agent, calcined dolomite etc. can be used, for example.

The water scavenger may have a suitable size. In one example, the average particle diameter of the water scavenger may have a size of about 10 to 15,000 nm. Moisture remover having a size in the above range can effectively block the moisture. The content of the moisture remover may be used in the range of 5 parts by weight to 250 parts by weight based on 100 parts by weight of the resin, which may be used as the moisture barrier resin layer as described above, for example.

In addition, the moisture barrier resin layer may further include a dispersant so that the moisture remover can be uniformly dispersed in the resin layer. As the dispersant that can be used here, for example, a nonionic surfactant having affinity with the surface of the hydrophilic water scavenger and having good compatibility with the resin can be used. According to another exemplary embodiment, if the moisture barrier resin layer has moisture barrier properties, the moisture barrier resin layer may include a thermosetting and photocurable pressure-sensitive adhesive composition as described in the pressure-sensitive adhesive layer 400.

As the metal thin film layer, for example, a metal foil having a thickness of 1 μm to 300 μm may be used, which is attached to the display panel 100 through an adhesive, for example, to form the barrier layer 500. Can be formed.

In addition, the deposition layer is formed by depositing at least one selected from a metal and a metal oxide, which is formed on a base film, for example, a base film such as polyethylene terephthalate (PET), polyethylene (PE), or polypropylene (PP). After being deposited and formed, the barrier layer 500 may be attached to the display panel 100 together with the base film.

In the present application, the metal applied to the barrier layer 500, specifically, the metal constituting the metal thin film layer or the deposition layer is, for example, aluminum (Al), copper (Cu), nickel (Ni), tin (Sn). , At least one selected from the group consisting of zinc (Zn), indium (In), silver (Ag), tungsten (W), iron (Fe) and the like (single metal or a mixture of single metals), or two or more selected from them Alloys and the like, but are not limited thereto. In addition, in the case of the metal oxide that can be used as the deposition layer, for example, aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ), tin oxide (SnO ₂ ), indium oxide (In ₂ O ₃ ) and oxidation Zinc (ZnO) and the like.

In addition, the barrier layer 500 may include a moisture barrier resin layer as described above, and the moisture barrier resin layer may be formed by applying a resin composition (adhesive composition) such as a thermosetting type and a photosetting type, and at this time, blocking moisture The resin layer may have a peel force (adhesive force) of 2.5 kgf / inch or more. The upper limit of the peel force is not limited. In the case of having such a peeling force, for example, the bonding force may be strengthened to the display panel 100 having a multilayer structure. Specifically, the moisture barrier resin layer adheres and fixes the liquid crystal cell layer 120, the front polarizing plate 140, and the rear polarizing plate 160 from the side, thereby enhancing their bonding force. For example, the peeling force of the moisture barrier resin layer may be 2.5 to 20.0 kgf / inch.

In addition, according to another embodiment of the present application, the packaging film 300 may have a structure in which a protective film is formed on the first region 310, and an adhesive layer 400 is formed on the protective film. The protective film may be selected from a resin film, which may for example be selected from a film comprising triacetyl cellulose (TAC) and / or acrylic resin. The protective film may have an adhesive force through the first region 310 and the adhesive.

According to the first aspect of the present application described above, an improved display device is implemented. For example, the back element 200 such as the optical element 200A is packaged by the packaging film 300, and then attached to the back surface of the display panel 100 through the pressure-sensitive adhesive layer 400 to bezel The area is minimized. That is, the use of a molding frame for fixing the display panel 100 and the rear element 200 is excluded, and thus a free-bezel display device having almost no bezel can be implemented.

In addition, excessive time consuming and damage to the optical element 200A, which may occur in the handling and assembly of the back element 200, for example, the optical element 200A on the film (or sheet), or the like, can be prevented. . In addition, the optical element 200A is packaged to have a sealability by the packaging film 300 to prevent light leakage or the like.

Second form

Hereinafter, a display device according to a second aspect of the present application will be described.

10 to 17 show embodiments of the display device according to the second aspect of the present application. In describing the second aspect of the present application, terms and reference numerals used in the same manner as in the first aspect have the same functions, and thus detailed description thereof will be omitted. If there is a part that is not specifically described below, this is as described in the first aspect. For example, the material, physical properties, etc. of the packaging film 300 'are the same. In addition, in some cases, the first aspect may include a configuration of the second aspect described below.

The display device according to the second aspect of the present application includes a display panel 100; A rear element 200 installed on a rear side of the display panel 100; And a packaging film 300 ′ for packaging the display panel 100 and the rear element 200.

The packaging film 300 ′ wraps around the front surface 101 and the side surface 102 of the display panel 100. In addition, the packaging film 300 ′ wraps at least the side surface 202 of the back element 200. To this end, the packaging film 300 ′ may include a first region 310 corresponding to the front surface 101 of the display panel 100; The second region 320 may correspond to the side surface 102 of the display panel 100 and the side surface 202 of the back element 200. The second region 320 extends from the first region 310.

The display panel 100 and the rear element 200 are the same as those of the first embodiment. The display panel 100 may be any one as long as it can display an image as described in the first embodiment.

10 through 12 illustrate exemplary forms of the display panel 100. 10 to 12 specifically illustrate a liquid crystal display (LCD) panel.

10 to 12, the display panel 100 is, for example, at least one liquid crystal cell layer 120 and a polarizing plate formed on both surfaces of the liquid crystal cell layer 120. It may include a front polarizer 140 formed on the upper portion, and a rear polarizer 160 formed under the liquid crystal cell layer 120.

The back element 200 is not particularly limited as long as it is provided on the back side of the display panel 100 as described in the first embodiment. The back element 200 may be composed of one member or may have a multilayer structure including two or more members. The back element 200 may have, for example, the shape of a film, sheet, flat plate, and / or three-dimensional device. For example, the back device 200 may include an electric / electronic device having an electric / electronic function; An optical element having an optical function; And / or one or more selected from heat dissipation elements having a heat dissipation function.

10 exemplarily illustrates the back element 200 having a single member. In this case, the back element 200 shown in FIG. 10 may be selected from, for example, an optical element 200A, an electronic circuit board, a heat sink, and the like. As a specific example, the back element 200 may be selected from the optical element 200A.

The optical element 200A may be, for example, an element having functions such as light diffusion, condensation, polarization, and / or reflection, but is not limited thereto. In addition, the optical device 200A may include a light source for generating light. In the present application, the optical element 200A includes a light source for generating light, and / or all kinds of devices, films and / or sheets, etc. used to process the light. The optical element 200A may be, for example, at least one selected from a light guide plate, a diffusion sheet, a brightness enhancing film, a prism film, a lens film, a polarizing film, a reflective film, a viewing angle compensation film, a retardation film, a protective film for protecting them, and the like. It may include an optical member (200a).

In addition, the optical device 200A may be selected from a light source assembly further including a light source 240 in the optical member 200a as illustrated above. In the present application, the specific form of the light source assembly is not particularly limited, and may be selected from, for example, a conventional direct type or edge type light source assembly. As a specific example, the light source assembly as the optical element 200A may be selected from a backlight unit BLU commonly used in a liquid crystal display (LCD) device.

11 and 12 illustrate a multi-layered optical element 200A as the back element 200. Specifically, as the back element 200, FIG. 11 illustrates an optical element 200A including a plurality of optical members 200a, and FIG. 12 includes a plurality of optical members 200a and a light source 240. The optical element 200A is illustrated.

Referring to FIG. 11, the optical element 200A is an optical member 200a, which includes a light guide plate 210 for converting a point light source emitted from a light source into a surface light source; And a diffusion sheet 220 formed on the light guide plate 210 and diffusing the light emitted from the light guide plate 210. In addition, the optical device 200A may further include a brightness enhancing film 230 formed on the diffusion sheet 220. The optical members 200a may be formed in one layer or two or more layers, respectively. In FIG. 11, the brightness enhancing film 230 is formed in two layers. The optical device 200A is packaged by the packaging film 300 ′ as shown in FIG. 11 and installed on the rear surface of the display panel 100. In this case, in FIG. 11, although the light source for supplying light to the light guide plate 210 is not shown, the light source may be separately provided, for example, to supply light to the light guide plate 210.

In addition, referring to FIG. 12, in the optical device 200A, a plurality of optical members 200a and a light source 240 form an assembly to be packaged by the packaging film 300 ′ together with the display panel 100. Can be. Specifically, optical element 200A is a light source assembly that includes a light source 240, which includes one or more light sources 240; A light guide plate 210 formed on the light source 240 and converting a point light source emitted from the light source 240 into a surface light source; The light guide plate 210 may include a diffusion sheet 220 formed on the light guide plate 210 to diffuse light from the light guide plate 210. As shown in FIG. 12, the optical device 200A may further include a brightness enhancement film 230 formed on the diffusion sheet 220.

The packaging film 300 ′ packages the display panel 100 and the back element 200 as described above. At this time, in packaging the optical element 200A as the back element 200, in the case of the light source 240, it is not packaged by the packaging film 300 ′ as shown in FIG. 11, or as shown in FIG. 12. It can be packaged together with 200a.

The packaging film 300 ′ includes a first region 310 and a second region 320 extending from the first region 310. The first region 310 corresponds to the front surface 101 of the display panel 100. The second region 320 corresponds to the side surface 102 of the display panel 100 and the side surface 202 of the back element 200. 12, the second region 320 may include a first flap 321 extending from the first region 310 and a second flap 322 extending from the first flap 321. second flap). The first flap 321 corresponds to the side surface 102 of the display panel 100, and the second flap 322 corresponds to the side surface 202 of the back element 200.

The packaging film 300 ′ preferably further includes a third region 330 for firmly fixing the display panel 100 and the rear element 200. The third region 330 extends from the second region 320, which corresponds to the rear surface 203 of the rear element 200.

13 to 17 illustrate exemplary embodiments of the packaging film 300 ′.

Among the

regions

310, 320, 330 of the packaging film 300 ′, at least the first region 310 and the second region 320 may each have the same or similar area as the corresponding portion. . For example, an area of the first area 310 may be the same as or similar to that of the front surface 101 of the display panel 100. The area of the second region 220 may be the same as or similar to the sum of the area of the side surface 102 of the display panel 100 and the area of the side surface 202 of the back element 200. More specifically, the area of the first flap 321 is the same as or similar to that of the side surface 102 of the display panel 100, and the second flap 322 is the same as the area of the side surface 202 of the back element 200. Or similar.

In addition, two or more second regions 320 may be provided. The second regions 320 may be, for example, two to four. That is, the second region 320 may extend from the first region 310 and may extend from at least two or more of four surfaces of the first region 310. In addition, the third region 330 may be, for example, two to four, which may be the same as the number of the second regions 320. For example, in FIG. 13, three second regions 320 are formed, and likewise, three third regions 330 are formed.

The packaging film 300 ′ is not limited as long as the packaging film 300 ′ further includes the first region 310 and the second region 320, and preferably the third region 330. In addition, each of the

regions

310, 320, 330 may be integrally formed. The packaging film 300 'is, for example, cut away so that one film has each of the

regions

310, 320, 330 as described above, so that each of the

regions

310, 320, 330 is separate. It can be formed integrally without joints.

The material of the packaging film 300 ′ is as described with the packaging film 300 of the first form. The packaging film 300 ′ may be selected from a light transmissive film. The packaging film 300 ′ may have optical properties such as polarization, condensation, and / or diffusion in some cases. At least the first region 310 may have such optical characteristics. In this case, it may be useful for packaging the optical element 200A.

In addition, the packaging film 300 ′ may be selected from an isotropic film. In the present application, isotropy means that there is no retardation or that there is only a retardation such that even if retardation exists, the retardation is so small that it does not substantially affect the phase of light passing through the film.

The packaging film 300 ′ may have, for example, a plane retardation Rin of 30 nm or less. For example, the packaging film 300 ′ may have a plane direction phase difference Rin calculated by Equation 1 below 30 nm, 25 nm or less, or 10 nm or less, for example, 0 to 25 nm. , 0 to 10 nm, 0.1 to 5 nm, 0.2 to 3 nm, or 0.5 to 2 nm.

In addition, the packaging film 300 ′ may have a thickness direction phase difference Rth of 35 nm or less. For example, the packaging film 300 ′ may have a thickness direction retardation Rth calculated by Equation 2 below 35 nm, 30 nm, 20 nm, or 10 nm, and specific examples. 0 to 30 nm, 0 to 20 nm, 0 to 10 nm, 0.1 to 5 nm, or 0.2 to 3 nm.

When packaging the display panel 100 and the back element 200, the

respective areas

310, 320, and 330 of the packaging film 300 ′ are bent at the boundary lines C1 and C2. In the drawing, the boundary lines C1 and C2 between the

areas

310, 320 and 330 are indicated by dotted lines. At this time, each boundary line (C1) (C2) is shown for convenience of description, which may or may not be displayed substantially on the packaging film (300 ').

In packaging the display panel 100 and the rear element 200 by using the packaging film 300 ′, for example, the first region 310 is first formed to correspond to the front surface 101 of the display panel 100. After positioning, the second region 320 is bent at the first boundary line C1, so that the second region 320 is formed on the side surface 102 of the display panel 100 and the side surface 202 of the back element 200. Position corresponding to). In addition, when the third region 330 is further included, the third region 330 is bent at the second boundary line C2 so that the third region 330 is formed on the rear surface 203 of the rear element 200. Packaged by placing corresponding to.

According to an exemplary embodiment, the packaging film 300 ′ may have adhesion to the display panel 100 and the back element 200. The adhesion can be, for example, at the interface of contact with each other. The attachment method is not particularly limited, and this can be carried out by applying, for example, thermal and / or light laminating methods. For example, the packaging film 300 ′ may be heated by fusion, or may be fused through light irradiation to be attached to each other. When attaching through such a laminating method, the heat and light irradiation conditions may be appropriately selected according to the type of the packaging film 300 ′, which is not particularly limited.

The packaging film 300 ′ may be, for example, fused to the display panel 100 and the rear element 200 in at least one selected from the second region 320 and the third region 330 to have an adhesive force.

According to another exemplary embodiment, the packaging film 300 ′ may be attached to the display panel 100 and the rear element 200 through separate attachment means. The attachment means may be, for example, an adhesive layer (not shown) formed between the packaging film 300 ′ and the display panel 100, and / or between the packaging film 100 and the back element 200. Can be.

The pressure-sensitive adhesive layer is formed on the contact interface between the packaging film 300 'and the display panel 100 and / or the contact interface between the packaging film 300' and the rear element 200, thereby achieving a bonding force therebetween. Is good. The adhesive layer may be formed by being coated on the packaging film 300 ′ or by being coated on the display panel 100 and the rear element 200. For example, the adhesive layer may be formed on at least one selected from the second region 320 and the third region 330. More specifically, the pressure-sensitive adhesive layer may be formed of at least an inner surface of at least the second region 320 and / or the third region 330 among the

regions

310, 320, 330 of the packaging film 300 ′, that is, the display. It may be formed on the surface in contact with the panel 100 and the back element 200.

The pressure-sensitive adhesive layer is not particularly limited as long as it has an adhesive force (adhesive force), for example, may be formed by coating the pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition may be selected from, for example, a photocurable and / or thermosetting pressure-sensitive adhesive composition, as described in the first aspect.

The packaging film 300 ′ may be at least between the second region 320 and the side surfaces 102 and 202 by a fusion method through heat and / or light or an adhesive method through an adhesive layer as described above. And / or between the third region 330 and the back surface 203.

In addition, the attachment means may be, for example, double-sided or one-sided adhesive tape. In this case, the double-sided adhesive tape may be interposed between the packaging film 300 ′ and the panel 100 / device 200. More specifically, the double-sided adhesive tape may be interposed between the second region 320 and the side surfaces 102 and 202 and / or between the third region 330 and the back surface 203. In the case of the one-side adhesive tape, for example, the tape may be taped on the outer surface of the third region 330 to achieve a bonding force with the rear element 200.

According to an exemplary embodiment, an adhesive layer may be formed between the display panel 100 and the rear element 200 in order to secure a firm fixing force. Since the pressure-sensitive adhesive layer is the pressure-sensitive adhesive layer 400 of the first embodiment, description thereof will be omitted.

13 and 14, a notch part 350 may be formed at the boundary line C1 of the first region 310 and the second region 320. In addition, when the packaging film 300 ′ further includes the third region 330, the notch 350 may also be formed at the boundary line C2 of the second region 320 and the third region 330. have. 14 is a cross-sectional view taken along the line AA ′ of FIG. 13.

The notch 350 is as described in the first embodiment. The notch 350 may be such that the second region 320 and the third region 330 can be easily bent at each boundary line C1 (C2). The notch 350 may be formed through, for example, a notch process that may generate a thickness step at the boundary lines C1 and C2. For example, the notch 350 may be selected from an oscillation processing unit formed by pressing the boundary lines C1 and C2, and a half cutting unit formed by half cutting the boundary lines C1 and C2. Can be. In the present application, the half does not mean only half of the thickness of the packaging film 300 ′.

The notch 350 may be formed to have a depth of, for example, 1/3 to 2/3 of the thickness of the packaging film 300 ′ by oscillation or half cutting, but is not limited thereto. In addition, the notch 350 may be continuously formed along the boundary lines C1 and C2 or may be discontinuously formed at predetermined intervals.

In addition, the notch 350 may have an elongation of 50 to 80% of the elongation before formation of the notch 350. Specifically, in the case where notches (eg, stashing treatments) are applied to the boundary lines C1 and C2, the elongation of the notch 350 may be 50 to 80% of the elongation before notching. For example, assuming that the elongation of the packaging film 300 'is 2 times (= 100%), the elongation of the notch 350 is 50 to 80% of the 2 times before the notch treatment, and is 1.0 to 1.8 times (ie, 50-80% elongation). When the elongation of the notch 350 is out of the above range, for example, the notch 350 may not be bent or broken.

The thickness of the packaging film 300 ′ is not particularly limited. The thickness of the packaging film 300 'may be set in various ways in consideration of supporting force, bending property of each

region

310, 320, 330, handling during packaging, and / or thinning of the film 300'. Can be. According to an exemplary embodiment, the thickness of the packaging film 300 ′ may satisfy an area of the first region 310 and Equation 3 above. The thickness of the packaging film 300 ′ may vary depending on the area of the first region 310, but it may be, for example, in a range of about 20 μm to 500 μm, 30 μm to 400 μm, or 35 μm to 200 μm. Can have

In addition, the packaging film 300 ′ may include, for example, one or more mechanical properties selected from (a) a tensile modulus of 1,200 MPa or more, (b) a tensile strength of 40 MPa or more, and (c) an elongation of 20% or more. Can have In the case of having such physical properties, the display panel 100 and the rear element 200 may be packaged and well supported.

The packaging film 300 ′ may have a small strain rate for a firm supporting force, a fixing force, and / or durability. As for the packaging film 300 ', strain (E) by the said [Equation 4] is 5% or less, for example.

In addition, referring to FIG. 13, an overlap prevention processor 360 may be formed in the third region 330. That is, when the third region 330 is bent to be attached to the rear surface 203 of the rear element 200, the overlapping prevention part is disposed on the third region 330 so that adjacent third regions 330 do not overlap each other. 360 may be formed.

Another embodiment of the overlap prevention processing unit 360 is illustrated in FIG. 15. Referring to FIG. 15, the overlap prevention processing unit 360 may be selected from the cutting unit 362 cut and removed to a predetermined length (L). In this case, the length L of the cutting part 362 may be greater than or equal to, for example, the width W ₃₃₀ of the adjacent third region 330. The cutting part 362 may also prevent overlapping with the adjacent third region 330.

Of the

regions

310, 320, 330 of the packaging film 300 ′, at least the first region 310 is light transmissive (transparent). The first region 310 may have, for example, a light transmittance of 80% or more, for example, a light transmittance of 90% or more, 95% or more, or 98% or more.

In addition, the rear surface of the first region 310, that is, the surface contacting the display panel 100 (the lower surface in the drawing) may have an uneven surface in some cases. By the uneven surface, after packaging, the first region 310 and the display panel 100 may be prevented from being fused. More specifically, referring to FIG. 11, the uneven surface may prevent fusion between the rear surface (lower surface in the drawing) of the first region 310 and the front surface (upper surface in the drawing) of the front polarizer 140. have. The uneven surface may be formed in various ways, as described in the first form.

According to an exemplary embodiment, an optical layer or another functional layer may be formed on at least one selected from a front side (upper part in the figure) and a rear side (lower part in the figure) of the first region 310. Specifically, at least one selected from, for example, a polarizing layer, a light diffusing layer, a viewing angle compensation layer, a retardation layer, an antireflection layer, an antiglare layer, and a protective film layer for protecting them on the front and / or rear surface of the first region 310. Functional layers can be formed. The functional layer may be stacked on the first region 310 as a separate member, or may be directly formed on the surface of the first region 310. For example, in the case of the polarization layer, a light diffusing film may be attached to the first region 310, and in the case of the anti-reflection layer, an antireflection material may be coated on the first region 310. Can be formed. In another example, the anti-glare layer may be directly formed on the upper surface of the first region 310 through a surface treatment such as a haze treatment.

The packaging film 300 ′ may include at least a polarization layer formed on the first region 310 according to an exemplary embodiment. The packaging film 300 ′ may include at least a polarization layer formed on the first region 310 and an adhesive layer formed on the polarization layer according to another exemplary embodiment. At this time, the pressure-sensitive adhesive layer may include the pressure-sensitive adhesive composition described in the first aspect, and may have physical properties as described in the first aspect. And release paper may be attached on the pressure-sensitive adhesive layer. The release paper is not particularly limited as long as it can protect the pressure-sensitive adhesive layer, for example, a resin film or a paper material having a release property may be used.

In addition, among the second region 320 and the third region 330, at least the second region 320 may have a light impermeability. That is, the second region 320 may have light impermeability to prevent light leakage to the side surface. The second region 320 may have, for example, 10% or less, 5% or less, 1% or less, 0.1% or less, or 0% light transmittance. According to a more specific aspect, at least the second flap 322 among the first flap 321 and the second flap 322 of the second region 320 may have a light impermeability. In this case, it is useful when the back element 200 is the optical element 200A.

For the light impermeability, the second region 320 may include at least one light leakage prevention layer selected from, for example, a light blocking layer and a reflection layer, and the light leakage prevention layer may be formed on at least the second flap 322. have. In addition, the third region 330 may optionally have the above light impermeability.

For example, the light blocking layer may be formed by coating a light blocking material on the second region 320. In addition, the reflective layer may be formed, for example, by coating a reflective material on the second region 320. Each material constituting the light shielding layer and the reflective layer is not particularly limited, as described in the first embodiment.

In addition, according to an exemplary embodiment, among the

regions

310, 320, 330, at least a second region 320, a barrier layer for blocking moisture to block external moisture is provided. Can be formed. Specifically, although the packaging film 300 ′ itself has moisture barrier property, a barrier layer may be further formed in at least the second region 320 to effectively block moisture.

The barrier layer may be capable of blocking at least external moisture from penetrating into the display panel 100. To this end, the barrier layer may be formed at a position corresponding to at least the first flap 321 in the second region 320, which also prevents moisture, such as moisture, from penetrating gas such as outside air. In order to prevent it, it has water impermeability (water barrier property) and gas impermeability, such as air.

The barrier layer is not particularly limited as long as it has at least moisture barrier property. The barrier layer may be formed on at least one selected from an inner side surface of the second region 320 and an outer side surface of the second region 320. Such a barrier layer may include one or more selected from, for example, a water barrier resin layer, a metal thin film layer, and a deposition layer.

The moisture barrier resin layer may be, for example, a film layer formed by attaching a moisture barrier resin film to the second region 320 or the side surface 102 of the display panel 100, or a moisture barrier resin composition may include a second region. Or a resin coating layer coated on the side surface 102 of the display panel 100.

The resin composition constituting the moisture barrier resin layer, the metal constituting the metal thin film layer, and the oxide constituting the vapor deposition layer are not particularly limited, and the first embodiment is as described above.

Referring to FIG. 16, a light impermeable processor 314 may be formed at an edge of the first region 310. As illustrated in FIG. 16, the first region 310 may have a light transmissive (transparent) main region 312, and a light impermeable processor 314 may be formed along the circumference of the main region 312. have. The light impermeable processing unit 314 may be light impermeable (light leakage preventing ability), as described above. As described in the first aspect, the light-impermeable processing unit 314 may be selected from, for example, a printed layer formed by printing a light-impermeable paint. In addition, the light impermeable processing unit 314 may be selected from the light shielding layer and the reflective layer as described above.

As described above, when the light impermeable processor 314 is formed at the magnetic field of the first region 310, the light leakage to the side may be completely blocked. Although the second region 320 has light impermeability to prevent light leakage to the side, for example, when bending the packaging film 300 ', the second region 320 does not bend exactly at the boundary line C1 (C2). Tolerances may occur and light leakage may occur laterally. In addition, in the process of packaging the packaging film 300 ′, the first region 310 is biased to one side, and the edge of the first region 310 is located at the side surface 202 of the optical device 200A, and thus light leakage to the side surface. This can happen. In this case, the light impermeable processing unit 314 may block the light to completely block the light leakage to the side. The width W ₃₁₄ and the thickness of the light impermeable treatment part 314 are not particularly limited, and are as illustrated in the first embodiment.

In addition, referring to FIG. 17, according to an exemplary embodiment, the first region 310 may be provided with a protrusion 315 in which the second region 320 does not extend. Specifically, as shown in FIG. 17, the second region 320 extends from the first region 310, but does not extend from the vertex 310a of the first region 310 to have a step 316. The extension is formed, the first region 310 may be provided with a protrusion 315. That is, the vertex 310a of the first region 310 may protrude.

When the protrusion 315 is provided as described above, that is, when the protrusion 315 in which the second region 320 is not extended is provided in the first region 310, stress is generated when the second region 320 is bent. ) Can be prevented. Although it may vary depending on the mechanical properties and thickness of the packaging film 300 ′, as shown in FIG. 13, when there is no protrusion 315 from which the vertex 310a protrudes, when the second region 320 is folded, the first region ( Stress is applied to the vertex 310a of the 310, and a lifting phenomenon may occur near the vertex 310a. However, when the protrusion 315 is provided, the above lifting phenomenon can be prevented.

According to the second aspect of the present application described above, an improved display device is implemented. The display panel 100 and the back element 200 are fixed by packaging through the packaging film 300 ′, for example, to minimize the bezel area. That is, the use of the molding frame for fixing the display panel 100 and the rear element 200 is excluded, so that a free-bezel display device having almost no bezel can be implemented.

In addition, excessive time consuming and damage to the optical element 200A, which may occur in the handling and assembly of the back element 200, for example, the optical element 200A on the film (or sheet), or the like, can be prevented. . In addition, as well as the display panel 100, the rear element 200 is packaged by the packaging film 300 ′, so that penetration of external moisture or air is blocked. The optical element 200A is packaged to have a sealability by the packaging film 300 ′, thereby preventing light leakage.

Hereinafter, an Example and a comparative example are illustrated. At this time, the following comparative examples are only presented for comparison with the examples, which are not excluded from the scope of the present application.

[Examples 1 and 2 and Comparative Examples 1 and 2]

A screen panel and a rear module (BLU mounted) implementing a 24-inch monitor were prepared and packaged into a polycarbonate (PC) film. At this time, the thickness of the film was changed according to each Example and Comparative Example. Specifically, in Examples 1 and 2, the following formulas were satisfied, and the thicknesses of the films were 38 μm (Example 1) and 75 μm (Example 2). In the case of Comparative Examples 1 and 2, the following Equation 3 was not satisfied, and those having a thickness of 25 μm (Comparative Example 1) and 250 μm (Comparative Example 2) were used.

[Equation]

T [μm] = 100 x S [m 2] + a

(Where T is the thickness of the PC film (μm), S is the panel area of the monitor (0.165 m 2), and a is 15 to 130.

The packaged monitor was installed on the wall in an inclined manner by about 10 degrees, left at 60 ° C. for 24 hours, and then the degree of sagging of the screen panel of the monitor was evaluated. In addition, it was evaluated whether the lifting part occurred between the monitor and the film during packaging. The above results are shown in the following [Table 1].

Table 1

Remarks	Example 1	Example 2	Comparative Example 1	Comparative Example 2
Thickness of PC film	38 μm	75 μm	25 μm	250 μm
Area of 24-inch monitor	0.165㎡	0.165㎡	0.165㎡	0.165㎡
After installing the monitor, the degree of deflection	none	none	Deflection (more than 2mm)	none
Lifting phenomenon	none	none	none	Excitement

As shown in Table 1, in Examples 1 and 2 in which the relationship between the thickness and the area satisfies the above equation, it was found that there was no deflection phenomenon after the installation of the monitor, and there was no lifting phenomenon. However, the sagging phenomenon occurs in Comparative Example 1, which does not satisfy the above equation and the thickness is too small for the area of the monitor. there was.

[Examples 3 to 4 and Comparative Example 3]

Films of different types were prepared according to each Example and Comparative Example, and the strain (E) was first measured according to the following equation. At this time, the film according to each Example and Comparative Example are all 60mm x 25mm (width x length), thickness 125㎛, the size and thickness are the same, respectively polycarbonate (PC) film (Example 3), Kinds were different as polyethylene terephthalate (PET) films (Example 4) and polyethylene (PE) films (Comparative Example 3).

[Equation]

E (%) = [(L2-L1) / L1] x 100

(In the above formula, L1 is the initial length of the film (60 mm), L2 is the length increased after standing for one day (24 hours) under a load of 3kg at a temperature of 80 ℃.)

Next, an LCD panel and a rear module (BLU mounted) implementing a 55-inch LCD TV were prepared, and these were packaged into films according to the above Examples and Comparative Examples. Then, the packaged LCD TV was installed on the wall in an inclined form by about 10 degrees, left at 60 ° C. for 24 hours, and then the degree of LCD panel protruding forward was evaluated. At this time, 10 people were visually observed the degree of protruding, and when one or less of the ten people sensed 'good', two or more cases were detected as 'bad'. The above results are shown in the following [Table 2].

TABLE 2

Remarks	Example 3	Example 4	Comparative Example 3
Type of film	PC film (125 μm)	PET film (125 μm)	PE film (125㎛)
Extended Length [L2] (80 ℃, 3kg Load)	0.83 mm	0.32 mm	5 mm
Strain [E]	1.4%	0.5%	8.3%
After installation, it protrudes (60 degrees Celsius, after leaving for 24 hours)	Good (no detect all 10)	Good (no detect all 10)	Poor (3 out of 10 detected)

As shown in Table 2, in Examples 3 and 4 using a film having a low strain (E), it can be seen that the phenomenon does not occur after installation on the wall surface.

On the other hand, the following examples and comparative examples are exemplary experimental examples for the pressure-sensitive adhesive layer. In the following Examples and Comparative Examples, the measurement method of physical properties is as follows.

[How to measure]

1. Room temperature storage modulus

The coated specimen was cut to a size of 15 cm x 25 cm (width x length), and the polycarbonate (PC) film was peeled off. And it was placed on a parallel plate (dynamic plate) of the dynamic adhesion measuring device, after adjusting the gap (gap), the zero point of Normal & Torque, after confirming the stabilization of the normal force, the room temperature storage modulus was measured. Specific measuring instruments and measurement conditions are as follows.

* Measuring instrument: ARES-RDA, TA Instruments Inc. with forced convection oven

* Measuring conditions

geometry: 8 mm parallel plate

gap: around 1 mm

-test type: dynamic strain frequency sweep

strain = 5.0 [%]

-temperature: Room temperature (25 ℃)

initial frequency: 0.1 rad / s, final frequency: 100 rad / s

2. Lifting phenomenon

15 cm x 25 cm (width x length) coated specimens were placed in a constant temperature / humidity bath at a temperature of 60 ° C. and a humidity of 90%, left for 240 hours, and then the degree of lifting between the PC film and the pressure-sensitive adhesive layer was observed under a microscope. The case of no uplift was evaluated as 'good' and the case of uplifting was 'uplifting'.

3. pushed distance

The coated specimen was cut to 25 mm x 25 mm (horizontal x vertical), and subjected to a vertical load of 1 kgf for 4 hours at room temperature (approximately 15 ° C.) and 80 ° C., respectively, for 4 hours, and the distance the pressure-sensitive adhesive layer was pushed from the PC film under a microscope. Observation and evaluation were made.

4. Peeling force (adhesive force)

15 cm x 25 cm (width x length) coated specimens were peeled at 180 degrees and peeled at 30 mm / min at room temperature with respect to the adhesive surface of the PC film and the adhesive layer using a TA (Texture Analysis). Peel force (adhesive force) was evaluated.

[Examples 5 to 8 and Comparative Examples 4 to 6]

The acrylic adhesive resin was synthesized with the components and contents as shown in the following [Table 3], a curing agent was mixed therein, and then coated / cured on a polycarbonate (PC) film to form an adhesive layer.

The coated specimens were evaluated at room temperature elastic modulus, lifting phenomenon, and pushed distance (room temperature and 80 ° C.), and the results are shown together in the following [Table 3].

TABLE 3

Remarks	Example 5	Example 6	Example 7	Example 8	Comparative Example 4	Comparative Example 5	Comparative Example 6
Adhesive resin (parts by weight)	EHA / MA / AA65 / 25/10	EHA / MA / AA65 / 25/10	EHA / MA / AA68 / 25/7	EHA / MA / AA68 / 25/7	EHA / MA / AA65 / 25/10	EHA / MA / AA68 / 25/7	BA / AA96 / 4
Mw	1.7 million	1.45 million	1.8 million	143 million	760,000	760,000	1.7 million
Curing agent (part by weight)	0.015	0.015	0.015	0.015	0.015	0.1	0.015
G '	8.4	8.3	7.9	6.8	4.1	4.8	5.2
Degree of crosslinking (%)	56%	49%	58%	46%	4.5%	82%	71%
Lifting	Good	Good	Good	Good	Good	Uplifting	Uplifting
Distance (room temperature)	none	none	none	none	1.5mm	none	0.5mm
Back distance (80 ℃)	0.41	0.48	0.62	0.76	Pushed back	0.43	1.7mm
-EHA: 2-ethylhexyl acrylate-MA: methyl acrylate-AA: acrylic acid-BA: butyl acrylate-Mw: weight average molecular weight of the adhesive resin-curing agent: epoxy curing agent, based on 100 parts by weight of adhesive resin-G ': Room temperature storage modulus (x10 ⁵ dyne / ㎠)

As shown in [Table 3], it can be seen that the physical properties vary depending on the storage modulus of elasticity (G ′), the content of the curing agent, the degree of crosslinking, and the like, and in the case of the specimens according to the embodiments, high temperature / high humidity (60 ° C. / It was found that even after standing for a long time under the condition of 90%), there was no lifting, and the pushed distance at room temperature and 80 ° C was less than 1.0 mm, thereby ensuring excellent cohesive force.

[Examples 9 to 12 and Comparative Examples 7 to 9]

The acrylic adhesive resin was synthesized with the components and contents as shown in the following [Table 4], a curing agent was mixed therein, and then coated / cured on a polycarbonate (PC) film to form an adhesive layer.

The coated specimens were evaluated at room temperature storage modulus, peel force (adhesive force), lifting phenomenon, and pushed distance (at room temperature and 80 ° C.), and the results are shown together in the following [Table 4].

Table 4

Remarks	Example 9	Example 10	Example 11	Example 12	Comparative Example 7	Comparative Example 8	Comparative Example 9
Adhesive resin (part by weight)	EHA / MA / AA65 / 25/10	BA / MA / AA68 / 25/7	BA / MA / HBA58 / 40/2	BA / IBOA / MA / HBA58 / 20/18/2	BA / HBA99 / 1	BA / AA90 / 10	BA / AA96 / 4
Mw	1.45 million	1.45 million	1.2 million	1.15 million	1.7 million	1.8 million	1.7 million
Curing agent (a) (parts by weight)	0.015	0.015	-	-	-	0.015	0.015
Curing agent (b) (part by weight)	-	-	0.2	0.2	0.1	-	-
G '	8.3	8.3	9.2	7.6	4.1	8.2	5.2
Peel force (kgf / cm)	1.55	0.86	1.32	1.63	0.16	0.43	0.25
Lifting phenomenon	Good	Good	Good	Good	Uplifting	Uplifting	Uplifting
Back distance (room temperature)	none	none	none	none	0.6mm	none	0.5mm
Pushed distance (80 degrees Celsius)	0.48mm	0.48mm	0.32mm	0.35mm	1.8mm	0.43mm	1.7mm
-EHA: 2-ethylhexyl acrylate-MA: methyl acrylate-AA: acrylic acid-BA: butyl acrylate-HBA: hydroxy butyl acrylate-IBOA: isobornyl (meth) acrylate-Mw: weight of adhesive resin Average molecular weight-curing agent (a): epoxy curing agent, based on 100 parts by weight of the adhesive resin-curing agent (b): isocyanate curing agent, based on 100 parts by weight of the adhesive resin-G ': room temperature storage modulus (x10 ⁵ dyne / ㎠)

As shown in Table 4, in the case of the specimen according to the embodiments, there is no lifting even after being left for a long time at high temperature / high humidity (60 ° C./90%), and the pushed distance at room temperature and 80 ° C. is 0.5 It was found that excellent cohesion force was secured as less than mm.

[Examples 13 to 16 and Comparative Examples 10 to 13]

The acrylic pressure-sensitive adhesive resin was synthesized with the components and contents as shown in the following [Table 5], a curing agent was mixed therein, and then coated / cured on a polycarbonate (PC) film to form an adhesive layer.

The coated specimens were evaluated at room temperature elastic modulus, lifting phenomenon, and pushed distance (room temperature and 80 ° C.), and the results are shown together in the following [Table 5].

Table 5

Remarks	Example 13	Example 14	Example 15	Example 16	Comparative Example 10	Comparative Example 11	Comparative Example 12	Comparative Example 13
Adhesive resin (parts by weight)	BA / HBA99 / 1	BA / AA94 / 6	EHA / MA / AA65 / 25/10	EHA / MA / AA68 / 25/7	BA / HBA99 / 1	BA / AA94 / 6	EHA / MA / AA65 / 25/10	EHA / MA / AA68 / 25/7
Mw	1.7 million	1.7 million	112 million	1.16 million	1.7 million	1.7 million	112 million	1.16 million
P	12	12	12	12	0	0	0	0
Hardener	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
G '	1.7 x 10 ⁶	6.5 x 10 ⁶	7 x 10 ⁶	4.5 x 10 ⁶	4.7 x 10 ⁵	6.7 x 10 ⁵	8.3 x 10 ⁵	6.8 x 10 ⁵
Lifting	Good	Good	Good	Good	Uplifting	Uplifting	Good	Good
Distance (room temperature)	none	none	none	none	0.2mm	none	none	none
Back distance (80 ℃)	0.17mm	0.16mm	0.12mm	0.15mm	1.8mm	0.43mm	0.8mm	1.1mm
-BA: Butyl acrylate-AA: Acrylic acid-EHA: 2-ethylhexyl acrylate-MA: Methyl acrylate-HBA: Hydroxy butyl acrylate-Mw: Weight average molecular weight of adhesive resin-P: Multifunctional acrylate ( Tris [2- (acryloyloxy) ethyl] isosinate (using Tris [2- (acryloyloxy) ethyl] isocyanurate) as the trifunctional acrylate), based on 100 parts by weight of the adhesive resin- Curing agent: isocyanate curing agent , Based on 100 parts by weight of adhesive resin-G ': room temperature storage modulus (dyne / ㎠)

As shown in Table 5, in the case of the specimens according to the embodiments, there is no lifting even after being left for a long time at high temperature / high humidity (60 ° C./90%), and the pushed distance at room temperature and 80 ° C. is 0.2 It was found that excellent cohesion force was secured as less than mm.

Claims

Display panel;

A rear element disposed on a rear surface of the display panel;

A packaging film for packaging the back element; And

Including a pressure-sensitive adhesive layer formed between the display panel and the packaging film,

The packaging film,

A first region corresponding to the front surface of the rear element; And

And a second region extending from the first region and corresponding to a side surface of the rear element.
Display panel;

A rear element disposed on a rear surface of the display panel; And

A packaging film for packaging the display panel and the rear element,

The packaging film,

A first area corresponding to a front surface of the display panel; And

And a second region extending from the first region and corresponding to a side surface of the display panel and a side surface of the rear element.
The method according to claim 1 or 2,

The packaging film further includes a third region extending from the second region and corresponding to a rear surface of the rear element.
The method according to claim 1 or 2,

And two to four second regions.
The method according to claim 1 or 2,

The packaging film is a display device, the absolute value of the surface direction retardation (Rin) is 30 nm or less.
The method according to claim 1 or 2,

The said packaging film is a display apparatus whose absolute value of thickness direction retardation (Rth) is 35 nm or less.
The method of claim 3,

And a notch portion formed at a boundary line between the first region and the second region, or a boundary line between the second region and the third region.
The method of claim 3,

The first region and the second region, or the second region and the third region, the display device having a bending strength of 1.0 gf to 10.0 gf at each boundary line.
The method according to claim 1 or 2,

A display device of which the thickness of the packaging film satisfies the area of the first region and the following equation:

[Equation]

T [μm] = 100 x S [m 2] + a

In the above equation, T is the thickness (μm) of the packaging film, S is the area (m 2) of the first region, and a is a number from 15 to 130.
The method according to claim 1 or 2,

The packaging film, the display device having one or more physical properties selected from the following (a) to (c).

(a) Tensile modulus of at least 1,200 MPa

(b) a tensile strength of at least 40 MPa

(c) elongation at least 20%
The method according to claim 1 or 2,

The packaging film, the display device having a strain (E) of 5% or less according to the following equation:

[Equation]

E (%) = [(L2-L1) / L1] x 100

In the above equation, L1 is the initial length of the packaging film, and L2 is the length of the packaging film after being left for one day (24 hours) with a load of 3 kg at a temperature of 80 ° C.
The method of claim 3,

And the third region is provided with an overlap prevention processing unit that prevents overlapping with adjacent third regions when the third region is bent to correspond to the rear surface of the rear element.
The method according to claim 1 or 2,

And the second region is light impermeable.
The method according to claim 1 or 2,

And a light impermeable treatment part formed at an edge of the first region.
The method according to claim 1 or 2,

The first area is a display device having a protrusion that does not extend the second area.
The method of claim 1,

The first region is a display device that is easily surface-treated on the front surface in contact with the pressure-sensitive adhesive layer.
The method according to claim 1 or 2,

A display device having a back surface of the second region having an uneven surface.
The method according to claim 1 or 2,

The packaging film is a film comprising at least one resin selected from polycarbonate, polyester, polyolefin, cyclic polyolefin, acrylic, urethane, epoxy, polyamide, cellulose, nylon and derivatives thereof. Display device.
The method of claim 1,

The display device further comprises a barrier layer formed on the side of the display panel.
The method of claim 1,

The pressure-sensitive adhesive layer has a room temperature storage modulus of 6.0 x 10 5 dyne / ㎠ or more.
The method of claim 1,

The adhesive layer has a peeling force of 0.8 kgf / cm or more when peeling at a peeling rate of 30mm / min at room temperature.
The method of claim 1,

The pressure-sensitive adhesive layer comprises a photocurable pressure-sensitive adhesive composition, the display device having a room temperature storage modulus after light curing of 1.0 x 10 6 dyne / ㎠ or more.
The method according to claim 1 or 2,

And the back element comprises an optical element.
The method of claim 23,

The optical element,

Light source;

A light guide plate for converting the point light source emitted from the light source into a surface light source; And

And a diffusion sheet for diffusing the light emitted from the light guide plate.