KR102430070B1 - Liquid crystal display device with black adhesive resin - Google Patents

Abstract

A liquid crystal display is provided. A liquid crystal display device includes a liquid crystal panel, a backlight unit, a cover glass, a frame, and a light-shielding adhesive resin. The backlight unit is in contact with the lower surface of the liquid crystal panel. The adhesive resin adheres the liquid crystal panel and the backlight unit, and is configured to block light emitted from the backlight unit. The liquid crystal display device adheres the liquid crystal panel and the backlight unit, and includes a light-shielding adhesive resin that blocks light emanating between the liquid crystal panel and the backlight unit, thereby minimizing the bezel size of the liquid crystal display device and minimizing light leakage. .

Description

Liquid crystal display device including adhesive resin and manufacturing method thereof {LIQUID CRYSTAL DISPLAY DEVICE WITH BLACK ADHESIVE RESIN}

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display having a structure that reduces the bezel size of the liquid crystal display and minimizes light leakage that may occur between a liquid crystal panel and a backlight unit.

A liquid crystal display (LCD) is a display device that implements an image by placing a light source under the liquid crystal and controlling the arrangement of the liquid crystal by applying an electric field to the liquid crystal, thereby controlling the transmittance of light generated from the light source. , smartphones, tablet PCs, etc. are applied to various electronic devices. In particular, recently, research has been actively conducted to reduce the bezel area of the liquid crystal display in order to make the design of the liquid crystal display beautiful and to reduce the size of the liquid crystal display.

The liquid crystal display includes a backlight unit including a light source and a liquid crystal panel disposed on the backlight unit. The backlight unit and the liquid crystal panel are attached with an adhesive tape. However, as the bezel area of the liquid crystal display is reduced, the size of the adhesive tape is also reduced, and the adhesive area of the adhesive tape may also be reduced. Reduction of the adhesive area of the adhesive tape weakens the adhesive strength of the adhesive tape and causes various problems such as light leakage in the liquid crystal display device.

[Related technical literature]

1. Liquid crystal display module (Patent Application No. 10-2013-0169348)

An object of the present invention is to provide a liquid crystal display having a structure for fixing a liquid crystal panel and a backlight unit and reducing light leakage even when a bezel area is reduced. Another object to be solved by the present invention is to provide a method of manufacturing a liquid crystal display capable of reducing process time and cost by simplifying a process involved in manufacturing a liquid crystal display having a reduced bezel area.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, a method of manufacturing a liquid crystal display device according to an embodiment of the present invention includes the steps of manufacturing a liquid crystal panel, arranging a backlight unit on the rear surface of the liquid crystal panel, and a block jig. disposing on side surfaces of the liquid crystal panel and the backlight unit, applying an adhesive resin to a space between the liquid crystal panel and the backlight unit and the block jig to adhere the liquid crystal panel and the backlight unit, and the block and removing the jig from the adhesive resin.

According to another feature of the present invention, before the step of bonding the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig, a cover on the outer surface of the liquid crystal panel It further comprises the step of disposing the glass.

According to another feature of the present invention, in the manufacturing of the liquid crystal panel, the upper polarizing plate of the liquid crystal panel is manufactured to have an extension extending in an outer direction more than the upper, lower, and lower polarizing plates of the liquid crystal panel.

According to another feature of the present invention, in the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig is arranged to be in contact with the end of the extension part.

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig comprises applying the adhesive resin to the inner surface of the extension; It is applied so as to be in contact with the side surface of the liquid crystal panel and the side surface of the backlight unit.

According to another feature of the present invention, in the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig is disposed to be spaced apart from the end of the extension part by a predetermined distance. .

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig comprises applying the adhesive resin to the inner surface of the extension; It is characterized in that it is applied so as to be in contact with the inner surface of the cover glass, the side surface of the liquid crystal panel, and the side surface of the backlight unit.

According to another feature of the present invention, in the step of manufacturing the liquid crystal panel, the liquid crystal panel is manufactured to be longer than the backlight unit in at least one axis, and in the step of disposing the backlight unit on the rear surface of the liquid crystal panel, the liquid crystal panel is It is further extended to at least one side of the backlight unit.

According to another feature of the present invention, in the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig further extends to at least one side of the backlight unit. It is arranged so as to be in contact with the end end.

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig comprises applying the adhesive resin to the inner surface of the liquid crystal panel. , is applied so as to be in contact with the side surface of the liquid crystal panel and the side surface of the backlight unit.

According to another feature of the present invention, in the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig further extends to at least one side of the backlight unit. It is arranged to be spaced apart from the end by a predetermined distance.

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig comprises applying the adhesive resin to the inner surface of the liquid crystal panel. , is applied so as to be in contact with the inner surface of the cover glass, the side surface of the liquid crystal panel, and the side surface of the backlight unit.

According to another feature of the present invention, the adhesive resin applied to the space between the liquid crystal panel and the backlight unit and the block jig has a viscosity of 20,000 cps to 45,000 cps, and has a thixotropy of 3 to 6.

According to another feature of the present invention, the adhesive resin has an Optical Density of 1.4 or more at a thickness of 0.33 mm.

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig includes the lower surface of the upper polarizing plate of the liquid crystal panel and the applying a first adhesive resin layer to be in contact with each other; curing the first adhesive resin layer; applying a second adhesive resin layer to cover the first adhesive resin layer; and curing the second adhesive resin layer.

According to another feature of the present invention, the optical density value of the first adhesive resin layer may be higher than the optical density value of the second adhesive resin layer.

According to another feature of the present invention, the first adhesive resin layer may be composed of a wet resin cured by moisture, and the second adhesive resin layer may be composed of a photocurable resin cured by ultraviolet rays.

According to another feature of the present invention, the step of adhering the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig includes emitting ultraviolet rays through the block jig. and curing at least a portion of the adhesive resin.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, a separate adhesive tape can be omitted by fixing the liquid crystal panel and the backlight unit to each other through the light-shielding adhesive resin applied to the side surfaces of the liquid crystal panel and the backlight unit, thereby reducing the bezel size of the liquid crystal display and at the same time There is an effect that can minimize the light leaking from the side of the liquid crystal panel and between the bonding space between the liquid crystal panel and the backlight unit.

The present invention fixes the liquid crystal panel and the backlight unit to each other through the light-shielding adhesive resin applied to the side surfaces of the liquid crystal panel and the backlight unit, thereby improving the durability of the liquid crystal display by alleviating the external impact applied to the liquid crystal display by the light-shielding adhesive resin. has the effect of making

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a schematic exploded perspective view of a liquid crystal display according to an embodiment of the present invention.
2 is a schematic cross-sectional view illustrating a liquid crystal display device according to an embodiment of the present invention.
3 is a view showing the synthesis of an acrylic copolymerization resin as a chemical formula in the light-shielding adhesive resin according to an embodiment.
4A to 4C are views showing the synthesis of a urethane-acrylate oligomer as an example of an acrylic copolymerization resin by chemical formula in the light-shielding adhesive resin according to an embodiment of the present invention.
5 is a schematic cross-sectional view for explaining a liquid crystal display device according to an embodiment of the present invention.
6 is a cross-sectional view illustrating a liquid crystal display device in which a light-shielding adhesive resin is applied to external surfaces of a liquid crystal panel and a backlight unit and the liquid crystal panel and the backlight unit are fixed according to an embodiment of the present invention.
FIG. 7 is a view for explaining a schematic process of manufacturing the liquid crystal display shown in FIG. 6 .
8 is a view for explaining a method of manufacturing a liquid crystal display device in which a separate cutting process step is omitted by adjusting the width of the light-shielding adhesive resin applied to the side surfaces of the liquid crystal panel and the backlight unit using a block jig.
9 is a view for explaining a method of manufacturing a liquid crystal display device using an adhesive resin bonding step including a plurality of adhesive resin coating processes and a plurality of curing processes according to another embodiment of the present invention.
10 is a cross-sectional view illustrating a liquid crystal display device in which a light-shielding adhesive resin is applied to side surfaces of a liquid crystal panel and a backlight unit to fix the liquid crystal panel and the backlight unit according to another embodiment of the present invention.
11 is a view for explaining a schematic manufacturing method of manufacturing the liquid crystal display shown in FIG. 10 .
FIG. 12 is a view for explaining a method of manufacturing a liquid crystal display device using an adhesive resin bonding step including a plurality of adhesive resin coating processes and a plurality of curing processes according to another embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless specifically stated otherwise.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

Reference to a device or layer “on” another device or layer includes any intervening layer or other device directly on or in the middle of another device.

Although first, second, etc. are used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

Like reference numerals refer to like elements throughout.

The size and thickness of each component shown in the drawings are illustrated for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated component.

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be implemented independently of each other or may be implemented together in a related relationship. may be

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view for explaining the configuration of a liquid crystal display according to an embodiment of the present invention.

The liquid crystal display device 100 includes a liquid crystal panel PNL in which pixels are arranged in a matrix form to output an image, and a backlight unit installed on the rear surface of the liquid crystal panel PNL to emit light over the front surface of the liquid crystal panel PNL. (BLU).

The liquid crystal panel (PNL) is opposite to each other so that a uniform cell gap is maintained. It consists of the formed liquid crystal layer (LC).

A common electrode and a pixel electrode are formed in the liquid crystal panel PNL to which the upper substrate 102 and the lower substrate 104 are bonded to apply an electric field to the liquid crystal layer LC, and a voltage is applied to the common electrode. When the voltage of the data signal applied to the pixel electrode is controlled, the liquid crystal of the liquid crystal layer LC rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode to transmit or block light for each pixel. will display the video. A polarizing plate (not shown) is attached to the outside of the liquid crystal panel PNL configured as described above, and polarizes light passing through the liquid crystal panel PNL.

When describing the backlight unit (BLU) in detail, a light source 108 for generating light is disposed on one side of a light guide plate (LGP) 106 . The light source 108 may be implemented as a Light Emission Diode (LED). However, the light source is not limited thereto, and instead of the light emitting diode, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, or other device emitting various light may be implemented. can

A reflecting plate may be installed on the rear surface of the light guide plate 106, and light incident on the side of the light guide plate 106 is uniformly transmitted through the light guide plate 106 and the optical sheet 110 disposed on the upper surface of the liquid crystal panel ( PNL). In FIG. 1 , the optical sheet 110 is illustrated as a plurality of sheets including a diffusion sheet and a prism sheet. However, the optical sheet 110 may be provided in the form of one film including them. In FIG. 1, the light source is shown in an edge-type manner in which the light source is disposed in the bezel area and emits light in the direction of the light guide plate 106, but the light source is disposed under the active area (A/A) and emits light in the direction of the liquid crystal panel (PNL) It may be provided in a direct-type manner. The backlight unit BLU may include a driving circuit for driving a light source.

A liquid crystal panel PNL is mounted on the backlight unit BLU. To this end, the liquid crystal display 100 may be provided with a panel guide 114 . The panel guide 114 is disposed on the outside of the components of the backlight unit (BLU) as shown in FIG. 1 to support the liquid crystal panel (PNL) and to specify a position between the liquid crystal panel (PNL) and the backlight unit (BLU). can play a role In some embodiments of the present invention, the panel guide 114 may be omitted from the liquid crystal display 100 in order to reduce the bezel size of the liquid crystal display 100 .

Components of the backlight unit BLU are accommodated in the cover bottom 112 . That is, the light guide plate 106 , the light source 108 , and the optical sheet 110 of the backlight unit BLU are disposed inside the outer sidewall 112_W of the lower cover 112 . The outer sidewall 112_W of the lower cover 112 may be configured to support the liquid crystal panel PNL like the panel guide 114 . In addition, the outer sidewall 112_W of the lower cover 112 may be configured to have a low height so as not to contact the liquid crystal panel PNL, and the panel guide 114 without the outer sidewall 112_W is the upper surface of the lower cover 112 . The light guide plate 106 and the light source 118 may be accommodated inside the panel guide 114 .

The liquid crystal panel PNL and the backlight unit BLU are coupled to each other to constitute the liquid crystal display 100 . A cover glass 116 is disposed on the liquid crystal panel PNL. The cover glass 116 is configured to protect the components of the liquid crystal panel PNL and the backlight unit BLU from external impact, foreign matter, or moisture. The cover glass 116 may be made of a material such as glass having excellent rigidity or plastic having good processability and capable of thermoforming. In addition, in some embodiments of the present invention, the cover glass frame 120 may be attached to the inner surface of the cover glass. Like the panel guide 114 , the cover glass frame 120 may be omitted from the liquid crystal display 100 .

The liquid crystal display device 100 may include a pressure sensor P_Sensor for measuring the pressure applied to the liquid crystal display device 100 . The pressure sensor P_Sensor may be configured to measure a pressure applied to the liquid crystal display 100 when a user inputs a touch command on the liquid crystal display 100 . In some embodiments of the present invention, the pressure sensor P_Sensor may be provided on the rear surface of the liquid crystal panel PNL or the rear surface of the backlight unit BLU. In addition, in some embodiments of the present invention, a portion of the pressure sensor P_Sensor may be disposed on the rear surface of the liquid crystal panel PNL and another portion of the pressure sensor P_Sensor may be provided on the rear surface of the backlight unit BLU.

2 is a schematic cross-sectional view illustrating a liquid crystal display device in a state in which a liquid crystal panel and a backlight unit are combined according to an embodiment of the present invention.

Referring to FIG. 2 , the liquid crystal panel PNL is attached to the upper substrate 102 , the lower substrate 104 , the liquid crystal layer LC, the sealant 116 , and the outer surfaces of the upper substrate 102 and the lower substrate 104 . and an upper polarizing plate POL_U and a lower polarizing plate POL_L.

The upper substrate 102 and the lower substrate 104 are substrates for supporting various components constituting the liquid crystal panel PNL, and one of the upper substrate 102 and the lower substrate 104 has a plurality of thin film transistors (Thin). A thin film transistor array composed of a film transistor (TFT), a pixel electrode electrically connected to the thin film transistor, and a common electrode disposed opposite the pixel electrode are provided. In this specification, the substrate provided with the thin film transistor array may be referred to as a thin film transistor substrate. A specific structure of the thin film transistor substrate may include a driving mode used by the liquid crystal panel PNL, for example, a twisted nematic (TN) mode, a vertical alignment (VA) mode, an in plane switching (IPS) mode, and a fringe field (FFS) mode. switching) mode, and the like, may be formed in various well-known forms.

One of the upper substrate 102 and the lower substrate 104 is provided with a color filter layer that selectively transmits light of a specific wavelength. The substrate provided with the color filter layer may be referred to as a color filter substrate. In an embodiment, the upper substrate 102 may be formed of a color filter substrate and the lower substrate 104 may be formed of a thin film transistor substrate. However, the liquid crystal panel PNL of the present invention is not limited thereto, and the upper substrate 102 may be formed of a thin film transistor substrate and the lower substrate 104 may be formed of a color filter substrate. In addition, the thin film transistor array and the color filter layer may be provided on the same substrate.

The upper polarizing plate POL_U is attached to the upper surface of the upper substrate 102 , and the lower polarizing plate POL_L is attached to the lower surface (rear surface) of the lower substrate 104 . Liquid crystal panel (PNL) by the arrangement (Tilt Angle) of the liquid crystal by the electric field generated by the voltage difference applied to each of the pixel electrode and the common electrode and the combination of the upper polarizer (POL_U) and the lower polarizer (POL_L) permeability is controlled.

The cover glass 116 covers the liquid crystal panel PNL and the backlight unit BLU and is configured to protect the components of the liquid crystal panel PNL and the backlight unit BLU from external impact, foreign matter, or moisture. For example, the cover glass 116 may be made of a material such as glass having excellent rigidity or plastic having good processability and capable of being thermoformed. The cover glass 116 is disposed to extend to the active area A/A and the bezel area B/A surrounding the active area A/A. The cover glass 116 may be attached to the outer surface of the upper polarizing plate POL_U using an optical clear adhesive film (OCA) or an optical clear adhesive resin (OCR). Although not shown, a retarder film applied to convert a 2D image into a 3D image may be additionally provided between the upper polarizing plate POL_U and the cover glass 116 .

The liquid crystal display 100 shown in FIG. 2 includes a panel guide 114 . When the liquid crystal display device 100 includes the panel guide 114 , the light guide plate 106 and the optical sheet 110 of the backlight unit BLU are formed on the outer sidewalls 112_W of the panel guide 114 and the lower cover 112 . ) can be placed inside. As shown in FIG. 2 , when the outer sidewall 112_W of the lower cover 112 supports the liquid crystal panel PNL together with the panel guide 114 , the liquid crystal at the outer sidewall 112_W and the panel guide 114 . A surface facing the panel PNL may be utilized as a bonding region J in which an adhesive resin for fixing the liquid crystal panel PNL and the backlight unit BLU to each other is disposed.

In order to reduce the size of the bezel area in the liquid crystal display 100 , the width of the panel guide 114 may be reduced or the panel guide 114 may not be used. In this case, the bonding area J between the liquid crystal panel PNL and the backlight unit BLU is reduced. As the size of the tape-type adhesive member decreases, the adhesive strength decreases as well as being difficult to handle. Therefore, in the reduced bonding area J between the liquid crystal panel PNL and the backlight unit BLU, it is difficult to place the adhesive tape in an accurate position, so that the liquid crystal panel PNL and the backlight unit BLU are not adhered to each other.

For example, in order to realize a bezel size of 1 millimeter (mm) or less, the width of the junction region J between the actual liquid crystal panel PNL and the backlight unit 220 may be less than 1 mm. When an adhesive tape having a width of 1 mm or less is used, such as the width of the bonding region J, an increase in time required for the bonding process and a decrease in yield are inevitable. Of course, it is possible to increase the width of the adhesive tape to improve the convenience, process time and yield of the adhesive process, but this leads to an increase in the bezel size. Accordingly, in an embodiment of the present invention, the light-shielding adhesive resin 118 is interposed in at least a portion of the bonding region J between the liquid crystal panel PNL and the backlight unit BLU, so that the liquid crystal panel PNL and the backlight unit ( BLU) is cemented.

In more detail, the light-shielding adhesive resin 118 is interposed between the liquid crystal panel PNL and the panel guide 114 and between the liquid crystal panel PNL and the outer sidewall 112_W of the lower cover 112, the liquid crystal panel ( PNL) and the backlight unit (BLU) can be adhered. The light blocking adhesive resin 118 may be applied on the bonding region J through a nozzle. Accordingly, the width W1 of the light-shielding adhesive resin 118 may be disposed on the bonding region J with a thin width according to the size of the nozzle (eg, Φ0.1 mm). At this time, the width W1 of the light-shielding adhesive resin 118 is equal to the sum of the width W1a of the lower cover outer sidewall 112_W constituting the bonding area J and the width W1b of the panel guide 114 or could be shorter. If the panel guide 114 is not provided and the surface facing the liquid crystal panel PNL of the outer sidewall 112_W is used as the bonding area J, the width W1 of the light blocking adhesive resin 118 is the outer sidewall ( 112_W) may be equal to or smaller than the width W1a. For example, the width of the light blocking adhesive resin 118 disposed on the bonding region J may be 0.5 mm or less.

The light-shielding adhesive resin 118 serves to bond the liquid crystal panel (PNL) and the backlight unit (BLU) to each other and suppress the light leakage phenomenon in which light is leaked from the bonding area (J) of the liquid crystal panel (PNL) and the backlight unit (BLU). do As the light blocking adhesive resin 118 , a photocurable resin, a thermosetting resin, a hot-melt resin, a wet resin, or a combination thereof may be used.

In the case of photo-curable adhesive resin, it is cured with ultraviolet (UV) light, so that the liquid crystal panel (PNL) and the backlight unit (BLU) can be bonded together. In the case of a thermosetting resin, it can be cured by heating the applied adhesive resin, and in the case of a hot-melt resin, it can be applied in a high temperature state and cured by cooling. In the case of wet resin, it can be cured in response to moisture contained in air.

3 is a view showing the chemical formula of the synthesis of an acrylic copolymerization resin as an example of a light-shielding adhesive resin according to an embodiment of the present invention.

The light blocking adhesive resin 118 according to an embodiment of the present invention may be formed of a base resin, a light blocking material, and additives. In this case, the additive may include a photo-initiator, a curing accelerator, a foaming agent and a thixotropic agent. The base resin may be included in an amount of 80 to 90% by weight based on the entire light-shielding adhesive resin 118 . When the light blocking adhesive resin 118 is a photocurable adhesive resin, the light blocking adhesive resin 118 may contain a photoinitiator in an amount of 1 to 5 wt% based on the entire light blocking adhesive resin 118 .

The base resin may be made of an acrylic copolymer resin, but is not necessarily limited thereto. For example, the base resin made of an acrylate-based resin can be obtained by irradiating a composition comprising a cross-linkable monomer and a reactive oligomer with light such as ultraviolet light to react.

4A to 4C are views showing the synthesis of a urethane-acrylate oligomer as an example of an acrylic copolymerization resin by chemical formula in the adhesive resin according to an embodiment of the present invention.

As the crosslinking monomer, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-butylene glycol diacrylate, neopentyl glycol diacrylate, ethylene glycol diacrylate, and diethylene Glycol diacrylate, propylene glycol dimethacrylate, pentaerythritol tetraacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, dipentaerythritol pentaacrylate, pentaerythritol Erythritol hexaacrylate, triethylene glycol diacrylate, polyethylene glycol diacrylate, dipentaerythritol diacrylate, sorbitol triacrylate, bisphenol A diacrylate derivative, trimethylpropane triacrylate, and their methacrylates can be a material of

For the synthesis of the reactive oligomer, urethane acrylate series, as shown in FIGS. 3A to 3C , a polyol and diisocyanate are reacted to form an isocyanate at the end of the first synthesis, and then, here It can be prepared by reacting an acrylate containing a hydroxyl group with an isocyanate.

Acrylate-based resins are 2-ethylhexyl acrylate, trildecyl methacrylate, nonylphenol ethoxylate monoacrylate, beta-carboxyethyl acrylate, isobornyl acrylate, tetrahydrofurfuryl acrylate, tetrahydrofurfuryl 1 selected from the group consisting of methacrylate, 4-butylcyclohexyl acrylate, dicyclopentenyl acrylate, dicyclopentenyl oxyethyl acrylate, ethoxyethyl acrylate, and ethoxylated monoacrylate It can be more than one species.

The light-blocking material is a material for preventing light from leaking out. That is, the light-blocking material is a core material performing a light leakage blocking function of the light-shielding adhesive resin 118 . The light-blocking material comprises colored particles. As the colored particles, particles such as carbon black may be used, but the present invention is not limited thereto, and particles of various colors capable of absorbing or blocking light may be used. As an example, titanium oxide (TiO ₂ ) particles may be used as colored particles. It is preferable that the particle size of a colored particle is 1000 nm or less. This is because, when the particle size of the colored particles exceeds 1000 nm, the packing wear of the nozzle may be caused when the light-shielding adhesive resin 118 is applied.

Table 1 below shows the light blocking rate and optical density values according to the thickness and carbon content of the light blocking adhesive resin 118 .

Carbon content 0.2% 0.4% 0.5% 0.6% 0.8% 1.0% thickness
(μm) transmittance
(O. D value ) transmittance
(O. D value ) transmittance
(O. D value ) transmittance
(O. D value ) transmittance
(O. D value ) transmittance
(O. D value ) 100 64.88 37.12
(0.43) 30.16
(0.52) 26.34
(0.58) 16.48
(0.78) 9.87
(1.01) 200 47.46 21.30
(0.67) 15.23
(0.82) 9.73
(1.01) 5.83
(1.23) 3.08
(1.51) 300 33.84 10.21
(0.99) 7.10
(1.15) 3.36
(1.47) 1.18
(1.93) 0.34
(2.47) 400 26.86 4.70
(1.32) 2.72
(1.57) 1.32
(1.88) 0.21
(2.68) 0.06
(3.22) 500 20.46 2.67
(1.57) 0.96
(2.01) 0.25
(2.60) 0.12
(2.92) 0.02
(3.70) 600 15.96 1.18
(1.92) 0.25
(2.6) 0.07
(3.15) 0.01
(4.00) 0
(8) 700 9.65 0.51
(2.29) 0.19
(2.72) 0.05
(3.30) 0
(8) 0
(8) 800 6.71 0.37
(2.43) 0.10
(3.00) 0.03
(3.52) 0
(8) 0
(8) 900 6.68 0.15
(2.82) 0.02
(3.70) 0
(8) 0
(8) 0
(8)

As the content of colored particles in the light-shielding adhesive resin 118 increases, the light-shielding properties of the light-shielding adhesive resin 118 are improved. In addition, the OD value of the light-shielding adhesive resin 118 varies depending on the thickness of the light-shielding adhesive resin 118 at the portion where the light-shielding adhesive resin 118 is applied to the liquid crystal display. By applying the light-shielding adhesive resin 118 having a higher content of colored particles to a higher thickness, it is possible to provide the light-shielding adhesive resin 118 having a higher OD value. However, since the light-shielding adhesive resin (the higher the OD level, the lower the transmittance of UV light, the more difficult the UV curing process, such as the need to increase the amount of UV light and the irradiation time of UV light to cure the light-shielding adhesive resin 118). Therefore, the content of the light blocking material in the light blocking adhesive resin 118 included in the liquid crystal display is the OD value required to block light leakage at the position where the light blocking adhesive resin 118 is applied, and the thickness of the light blocking adhesive resin 118 . In addition, it is determined in consideration of the energy (curing energy) and curing time (curing time) required to cure the light-shielding adhesive resin 118 .

In order to prevent light leakage in the liquid crystal display, the light-shielding adhesive resin 118 preferably has an OD value (about 10% transmittance) of 1.0 or more. In order to provide such an OD value, the light-blocking material may be included in the range of 0.2 to 2 wt% based on the entire light-shielding adhesive resin 118 . More preferably, the light-blocking material is included in the range of 0.4 to 1 weight (wt)% with respect to the entire light-shielding adhesive resin 118, or more preferably from 0.4 to 0.8 weight (wt)% with respect to the entire light-shielding adhesive resin 118. range can be included.

As described above, the content of the light blocking material included in the light blocking adhesive resin 118 may vary depending on the thickness of the light blocking adhesive resin 118 in the liquid crystal display. For example, as shown in TABLE 1, in the case of the light blocking adhesive resin 118 applied to a thickness of 100 μm or more in the liquid crystal display, the content of the light blocking material may be at least 1.0 weight (wt)% or more. In addition, in the case of the light blocking adhesive resin 118 applied to a thickness of 200 μm or more, the content of the light blocking material may be at least 0.6 weight (wt)% or more. The light-shielding adhesive resin 118 applied to a thickness of 300 μm or more is contained in an amount of 0.4 wt.% to 0.8 wt.%, and an OD value between 1.15 and 1.93 (transmittance between 92.9% and 98.8%) It is preferable to have In this case, the light-shielding adhesive resin 118 may be cured in 30 seconds or less using UV light having an energy of about 800 mJ/cm 2 .

Plate-shaped particles may be additionally included as the light-blocking material, and in this case, the light leakage prevention effect may be increased. That is, when plate-shaped particles are included, light movement is blocked by the plate-shaped particles, so that a light leakage prevention effect can be obtained more efficiently. In particular, the plate-shaped particles may be arranged while maintaining their directionality due to shrinkage during the curing process, and thus may effectively prevent light leakage. In addition, an incidental effect in which the arrangement of colored particles is uniformly aligned by the plate-shaped particles can also be obtained. The plate-shaped particles may be made of a metal oxide such as aluminum oxide (Al ₂ O ₃ ), but is not necessarily limited thereto. It is preferable that the particle size of plate-shaped particle|grains is 1000 nm or less similarly to the above-mentioned colored particle. When the plate-shaped particles are included, the plate-shaped particles are preferably included in the range of 2 to 3 weight (wt)% with respect to the entire light-shielding adhesive resin 118 . The plate-shaped particles are not necessarily included, and in some cases, the plate-shaped particles may be omitted and the light blocking function may be implemented only with the colored particles.

As the light-blocking material, a photosensitive material that turns black in a transparent state may be included. For example, a photosensitive material such as silver bromide, silver iodide, or silver chloride may be included as the light blocking material. In this case, when the light-shielding adhesive resin 118 is cured by UV light, the light-shielding adhesive resin 118 changes to black in response to UV light, thereby providing an effect of blocking light.

A hardening accelerator is a material for making hardening of a base resin easier. The curing accelerator may include particles that diffuse UV light. When UV-diffusing particles are included, the irradiated UV rays can be diffused at various angles within the UV-diffusing particles during UV curing, and accordingly, a larger amount of UV light can be irradiated to the base resin, which will facilitate curing of the base resin. can

The UV diffusing particles may be formed of spherical or amorphous particles having a high refractive index of 1.5 or more. In particular, it is suitable for the ultraviolet diffusing particles to be made of a material having a refractive index of 0.01 or more, preferably 0.05 or more higher than that of the base resin to obtain the effect of diffusing ultraviolet light. Such ultraviolet diffusion particles may be made of polystyrene (PS), polycarbonate (PC), or polyethylene terephthalate (PET), but is not necessarily limited thereto.

The ultraviolet diffusion particles may include a blue pigment. When the blue pigment is included, the transmittance of UV light irradiated for UV curing may be increased, and curing of the base resin may be accelerated. That is, when the blue pigment is included, the transmittance of ultraviolet rays may be improved in the wavelength range of approximately 400 nm, more specifically, 380 nm to 420 nm, and accordingly, it is possible to obtain the effect of irradiating a larger amount of ultraviolet rays to the base resin.

The curing accelerator may be included in the range of 0.1 to 5% by weight based on the entire light-shielding adhesive resin 118 , and the particle size of the UV diffusion particles is preferably 1000 nm or less to prevent abrasion of the nozzle packing.

The foaming agent generates microbubbles on the surface of the light-shielding adhesive resin 118 through curing to induce diffuse reflection of light, thereby realizing a matte effect. For example, the light-shielding adhesive resin 118 may include an azodicarbon amide (ADCA)-based foaming agent. A hydrophilic functional group may be attached to such a foaming agent to be added to the light-shielding adhesive resin 118 .

These blowing agents generate gas during the polyaddition reaction to generate micro-bubbles. In the synthesis of the aforementioned reactive oligomer, when an azodicarbonamide blowing agent is added to the polyol, these materials react with isocyanate to generate microbubbles of carbon dioxide or carbon monoxide.

The foaming agent may be included in an amount of 0.1 to 5% by weight based on the entire light-shielding adhesive resin 118 .

For reference, the weight% of the materials constituting the light-shielding adhesive resin 118 should theoretically be 100% by weight, but since a small amount of impurities may be present in the light-shielding adhesive resin 118, the actual weight% of each material The sum may be less than or equal to 100% by weight of the total.

The light-shielding adhesive resin 118 achieves the purpose of maintaining fluidity of the liquid crystal panel PNL within a certain range in addition to bonding the liquid crystal panel PNL and the backlight unit BLU and preventing light leakage. By allowing the liquid crystal panel PNL to move according to a pressure within a predetermined range, it is possible to provide an effect of mitigating an impact on the pressure applied to the liquid crystal panel PNL from the outside. In this case, the light-shielding adhesive resin 118 interposed in the bonding region J between the liquid crystal panel PNL and the backlight unit BLU preferably has a modulus of 3 MPa to 10 MPa.

The liquid crystal display 100 may be provided with a pressure sensor. When the liquid crystal display device (LCM) is equipped with a pressure sensor, the liquid crystal panel (PNL) is moved by a predetermined distance by the force of the user pressing the liquid crystal panel (PNL) and then returned to the original position. LCM), it is possible to implement a pressure sensor by changing the position of the liquid crystal panel (PNL) or to make the feeling of use of the pressure sensor more natural. To this end, the thickness of the light blocking adhesive resin 118 interposed in the bonding area between the liquid crystal panel PNL and the backlight unit BLU may be between 0.02 mm and 1 mm. It is interposed in the bonding region J between the liquid crystal panel PNL and the backlight unit BLU in order not to significantly increase the thickness of the liquid crystal display device 100 while providing the above-described adhesive force, light leakage prevention effect, and fluidity security function. The thickness of the light-shielding adhesive resin 118 may be between 0.02mm and 0.5mm, more preferably between 0.02mm and 0.15mm.

For the convenience of the process of bonding the liquid crystal panel (PNL) and the backlight unit (BLU), the thixotropy of the light-shielding adhesive resin 118 on the bonding region between the backlight unit (BLU) is preferably between 3 and 6, and , the viscosity of the light-shielding adhesive resin 118 is preferably 20,000 cps to 45,000 cps. An organic thixotropic agent may be included as an additive to secure thixotropic properties of the light-shielding adhesive resin 118 . For example, the light-shielding adhesive resin 118 may include an organic bentonite-based thixotropic agent.

As an example of the light-shielding adhesive resin 118 that can be used in the liquid crystal display according to an embodiment of the present invention, the thixotropy index of the light-shielding adhesive resin 118 is 5.2 (measured by Brookfield LVDV-+), and , the viscosity may be 42,100 cps (measured by Brookfield LVDV-+), and may have a linear shrinkage of 0.8% upon curing.

When the light guide plate 106 or the optical sheet 110 included in the backlight unit BLU is moved by an external impact, defects such as bright lines may occur in the active area A/A. Accordingly, the optical sheet 110 of the backlight unit BLU may be fixed in contact with the light-blocking adhesive resin 118 in a portion of the bonding area J between the liquid crystal panel PNL and the backlight unit BLU. For example, when the active area A/A of the liquid crystal display device 100 is formed in a quadrangle, the optical sheet 110 of the backlight unit BLU may be disposed on top/bottom/left/side of the liquid crystal display device 100 . On at least one side of the right side, as shown in FIG. 5 , it may extend to the bonding area J of the liquid crystal panel PNL and the backlight unit BLU and be fixed by the light-blocking adhesive resin 118 .

Referring to FIG. 5 , the optical sheet 110 includes a fixing part extending to overlap a part of the bonding area J of the liquid crystal panel PNL and the backlight unit BLU on at least one side of the liquid crystal display device 100 . It may include more than one. The light-shielding adhesive resin 118 interposed in the bonding area J of the liquid crystal panel PNL and the backlight unit BLU also comes into contact with the optical sheet 110 extending to the bonding area J, so that the liquid crystal panel PNL and The optical sheet 110 is fixed at the same time as the backlight unit BLU is attached. As shown in FIG. 5 , even if there is a step difference due to the thickness of the optical sheet 110 in the bonding region J, the light-blocking adhesive resin 118 may fix the optical sheet 110 while filling the step.

When the optical sheet 110 is extended to a part of the bonding region J, it is difficult to fill the step caused by the thickness of the optical sheet 123 with a tape-type adhesive member (e.g., adhesive tape) having low thixotropy. Accordingly, it is difficult to prevent an empty space from being formed between the liquid crystal panel PNL and the backlight unit BLU, and the adhesive force of the adhesive tape is reduced. Instead of extending the optical sheet 110 to the bonding area J of the liquid crystal panel PNL and the backlight unit BLU, the optical sheet 110 is formed by extending the adhesive member in the form of a tape to the upper portion of the optical sheet 110 on the contrary. Even in the case of fixing, the liquid crystal panel PNL is lifted due to the thickness of the adhesive tape as above, and an empty space is created between the liquid crystal panel PNL and the optical sheet 110 . Also, as the width of the adhesive tape increases, the size of the bezel of the liquid crystal display 100 increases. Therefore, it is preferable to use the light-shielding adhesive resin 118 as shown in FIG. 5 rather than using an adhesive member in the form of a tape.

In some embodiments of the present invention, the light blocking adhesive resin 118 may be applied from the side surface of the liquid crystal panel PNL to the side surface of the backlight unit BLU to fix them to each other. In the liquid crystal display device 100 , a bonding region J between the liquid crystal panel PNL and the backlight unit BLU is applied to the portion where the light-shielding adhesive resin 118 is applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU. ) is disposed on the light-shielding adhesive resin 118 or may be omitted. In other words, as shown in FIG. 2 or FIG. 5 , in a portion of the bonding region J between the liquid crystal panel PNL and the backlight unit BLU of the liquid crystal display device 100, the light-shielding adhesive resin 118 is interposed. and the light-shielding adhesive resin 118 may not be interposed in another part of the bonding region J.

FIG. 6 shows that the light-shielding adhesive resin 118 is applied to the external side of the liquid crystal panel PNL and the backlight unit BLU according to an embodiment of the present invention to form the liquid crystal panel PNL and the backlight unit BLU. It is a cross-sectional view showing the fixed liquid crystal display device 100 . Referring to FIG. 6 , the upper polarizing plate POL_U of the liquid crystal panel PNL has an extension POL_EX that extends longer by a predetermined width W2a from the end of the lower polarizing plate POL_L. The light-shielding adhesive resin 118 includes the inner surface (i.e., the droplet display panel direction) of the extension portion POL_EX of the upper polarizing plate POL_U, the side surface of the upper substrate 102, the side surface of the lower substrate 104, and the lower polarizing plate ( The liquid crystal panel PNL and the backlight unit BLU are fixed in contact with the side surface of the POL_L and at least a portion of the side surface of the backlight unit BLU. Here, the external side of the backlight unit BLU may be an external side of the lower cover outer sidewall 112_W or an external side of the panel guide 114 . In the embodiment shown in FIG. 6 , the panel guide 114 is omitted to reduce the bezel size of the liquid crystal display 100 , and the light blocking adhesive resin 118 is formed on the lower cover sidewall 112_W of the backlight unit BLU. abuts on However, in some other embodiments of the present invention, the light blocking adhesive resin 118 may be disposed to contact the lower cover sidewall 112_W of the backlight unit BLU even when the panel guide 114 is not omitted. In addition, the panel guide 114 may be exposed to the outside of the backlight unit BLU, and the light blocking adhesive resin 118 may be in contact with the panel guide 114 .

In consideration of the adhesive force of the light-shielding adhesive resin 118 on the outer surface of the liquid crystal panel PNL and the outer surface of the backlight unit BLU, respectively, and the shear force of the light-shielding adhesive resin 118 after curing the light-shielding adhesive resin 118, the liquid crystal panel The light blocking adhesive resin 118 may be omitted in the bonding region J between the PNL and the backlight unit BLU. In other words, when sufficient fixing force can be secured only with the light blocking adhesive resin 118 applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, as shown in FIG. 6 , the liquid crystal panel PNL and the backlight unit BLU. The light-blocking adhesive resin 118 may be omitted in the bonding region J.

When the light-shielding adhesive resin 118 is not required in the bonding region J between the liquid crystal panel PNL and the backlight unit BLU, the light-shielding adhesive resin 118 is applied between the liquid crystal panel PNL and the backlight unit BLU. Since it is not necessary to consider the width of the junction region J for , the width of the portion supporting the liquid crystal panel PNL in the backlight unit BLU can be designed to be narrower. For example, the width of the panel guide 114 in the backlight unit BLU may be reduced. In addition, as shown in FIG. 6 , the panel guide 114 is omitted to reduce the bezel size, and the light blocking adhesive resin 118 is extended from the side of the liquid crystal panel PNL to at least a part of the lower cover side wall 112_W and folded. The liquid crystal panel (PNL) and the backlight unit (BLU) can be fixed.

For example, referring to the liquid crystal display 100 having four side surfaces as shown in FIG. 1 , the first bezel area and the second bezel area of the liquid crystal display 100 are as shown in FIG. 6 . The light-shielding adhesive resin 118 is applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, and the third bezel region and the fourth bezel region of the liquid crystal display device 100 are shown in FIG. 2 or FIG. 5 . Similarly, the light blocking adhesive resin 118 may be interposed between the bonding region J of the liquid crystal panel PNL and the backlight unit BLU. In addition, in the first to third bezel regions of the liquid crystal display device 100 , as shown in FIG. 6 , a light-blocking adhesive resin 118 is applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, and the liquid crystal display In the fourth bezel region of the device 100 , the light-blocking adhesive resin 118 may be interposed between the bonding region J of the liquid crystal panel PNL and the backlight unit BLU as shown in FIG. 2 or FIG. 5 . Of course, when the liquid crystal panel PNL has a circular shape or other shape instead of a rectangular shape, one side of the liquid crystal panel PNL has a light-shielding adhesive resin 118 with the liquid crystal panel PNL as shown in FIG. 2 or FIG. 5 . The light blocking adhesive resin 118 may be applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU as shown in FIG.

Even when the light-shielding adhesive resin 118 is applied to the side surfaces of the liquid crystal panel (PNL) and the backlight unit (BLU) in some bezel areas, stronger bonding between the liquid crystal panel (PNL) and the backlight unit (BLU) and the effect of preventing light leakage In addition, it is also possible that the light blocking adhesive resin 118 is additionally interposed in the bonding region J between the liquid crystal panel PNL and the backlight unit BLU.

The width of the light-shielding adhesive resin 118 on the side of the liquid crystal panel (PNL) and the backlight unit (BLU) is the Thixotropy Index, Viscosity of the light-shielding adhesive resin 118, the surface energy of the application area, and the light-shielding adhesive resin 118 is cured. It can be controlled by several factors, such as the time to A light-shielding adhesive resin 118 to fill the curvature (i.e., step difference) that may exist between the liquid crystal panel (PNL) and the backlight unit (BLU) and various curvatures on the outer surface of the liquid crystal panel (PNL) and the backlight unit (BLU). has a viscosity of 20,000 to 45,000 centipoises. In order to control that the light-shielding adhesive resin 118 does not penetrate into the backlight unit (BLU) beyond the bonding area (J) of the liquid crystal panel (PNL) and the backlight unit (BLU), the light-shielding adhesive resin 118 is between 3 and 6 It is desirable to have a thixotropy index of . For example, the light-shielding adhesive resin 118 having a viscosity of 40,000 cps to 45,000 cps and a thixotropy index of 4.5 to 5.5 may be coated on the outer surfaces of the liquid crystal panel PNL and the backlight unit BLU. It is preferable that the light-shielding adhesive resin 118 can be cured within 30 seconds under curing conditions of 800mJ/cm2 or more (100mW/cm2).

In a state of relatively high thixotropy before the light-shielding adhesive resin 118 is cured, the light-shielding adhesive resin 118 moves from the side of the liquid crystal panel PNL and the backlight unit BLU to the extension POL_EX of the upper polarizing plate POL_U. can flow Accordingly, the width of the light-blocking adhesive resin 118 may be increased at the sides of the liquid crystal panel PNL and the backlight unit BLU, which eventually becomes a factor that increases the size of the bezel area of the liquid crystal display 100 .

Therefore, the portion exceeding the width (e.g., 0.5mm) of the light-shielding adhesive resin 118 to maintain their bonding and prevent light leakage from the side of the liquid crystal panel (PNL) and the backlight unit (BLU) is grinded. Or it may be removed from the liquid crystal display device 100 by being cut (e.g., wheel cutting, laser cutting). At this time, the extended portion POL_EX of the upper polarizing plate POL_U at a portion corresponding to the light blocking adhesive resin 118 removed from the liquid crystal display 100 may also be removed from the liquid crystal display 100, and the liquid crystal display device The outer side of ( 100 ) may have a cut shape as in the embodiment of FIG. 6 .

FIG. 7 is a view for explaining a schematic process of manufacturing the liquid crystal display 100 shown in FIG. 6 . Referring to FIG. 7 , the method 10 of manufacturing the liquid crystal display device 100 includes a panel process step 12 of manufacturing the liquid crystal panel PNL. A liquid crystal panel PNL having an upper polarizing plate POL_U, an upper substrate 102 , a lower substrate 104 , and a lower polarizing plate POL_L is manufactured through the panel process step 12 . Here, an application/adhesive process of an optical clear adhesive (OCA) for adhering the upper polarizing plate POL_U and the upper substrate 102, and the lower polarizing plate POL_L and the lower substrate 104 may be performed.

An extension portion POL_EX is provided in the upper polarizing plate POL_U of the liquid crystal panel PNL manufactured through the panel process step 12 according to the present embodiment. In the present embodiment, the light blocking adhesive resin 118 not only contacts the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, but also comes into contact with the inner surface of the extension portion POL_EX of the upper polarizing plate POL_U. Therefore, OCA application is omitted between the upper polarizing plate (POL_U) and the upper substrate 102, and the upper polarizing plate (POL_U) is a light-shielding adhesive resin 118 applied to the sides of the liquid crystal panel (PNL) and the backlight unit (BLU) later. can be attached by That is, the lower polarizing plate POL_L and the lower substrate 104 may be adhered to each other through the transparent adhesive layer, and the upper polarizing plate POL_U and the upper substrate 102 may not be adhered to each other by the transparent adhesive layer. In this case, the panel process step 12 may proceed in such a way that the panel in the state of being bonded in the order of the upper substrate 102, the lower substrate 104, and the lower polarizing plate POL_L is placed on the upper polarizing plate POL_U. have.

A process of attaching a drive integrated circuit (IC) or a flexible printed circuit board (FPCB) on the liquid crystal panel PNL in the panel process step 12 may also be performed. That is, a chip-on-glass (COG) process and a flex-on-glass (FOG) process to which the drive circuit (Drive IC) and the FPCB are attached may also be performed as part of the panel process step 12 .

The method 10 of manufacturing a liquid crystal display includes a backlight unit (BLU) assembly step 14 . The BLU assembly step 14 may be performed before or after the panel processing step 12 separately from the panel processing step 12 . The backlight unit BLU assembled through the BLU assembly step 14 is disposed on the rear surface of the lower polarizing plate POL_L of the liquid crystal panel PNL.

The liquid crystal display manufacturing method 10 includes an adhesive resin bonding step 16 of fixing the liquid crystal panel PNL and the backlight unit BLU disposed on the rear surface of the liquid crystal panel PNL with a light-shielding adhesive resin 118 . do. That is, in a state in which the backlight unit (BLU) is placed to overlap the liquid crystal panel (PNL), the light-shielding adhesive resin ( 118) is applied.

At this time, in order to control the spread of the light-shielding adhesive resin 118 on the side of the liquid crystal panel PNL and the backlight unit BLU, the liquid crystal panel PNL and the backlight unit BLU are tilted at a predetermined angle. Resin 118 may be applied. For example, the inner surface of the upper polarizing plate POL_U is inclined at an angle of 10 degrees to 50 degrees, and the side surfaces of the liquid crystal panel PNL and the backlight unit BLU and the inner surface of the upper polarizing plate POL_U are the adhesive resin discharge part (Nozzle). The light-shielding adhesive resin 118 may be applied in a state of forming a “∨” shape toward the . In this way, the light blocking adhesive resin 118 is suppressed from spreading in the opposite direction of the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, thereby reducing the width W of the light blocking adhesive resin 118, The light-blocking adhesive resin 118 may come into contact with a larger area from the side surfaces of the liquid crystal panel PNL and the backlight unit BLU.

When the light blocking adhesive resin 118 is interposed in the bonding region J between the liquid crystal panel PNL and the backlight unit BLU as in the embodiments described above with reference to FIG. 2 or FIG. 5, the liquid crystal panel PNL. A process of applying the light-blocking adhesive resin 118 to the bonding area J of the backlight unit BLU and the backlight unit BLU may be performed first. However, the light-shielding adhesive resin 118 applied to the side surfaces of the liquid crystal panel (PNL) and the backlight unit (BLU) by adjusting the viscosity and thixotropy of the light-shielding adhesive resin 118 without performing a separate process is applied to the bonding area thereof. It is also possible to induce it to be interposed in (J).

For example, when the light-shielding adhesive resin 118 is applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU, a predetermined distance is left between the liquid crystal panel PNL and the backlight unit BLU. 118 may be adjusted to flow into the junction region J between the liquid crystal panel PNL and the backlight unit BLU by a predetermined distance.

When the light-shielding adhesive resin 118 is not interposed in the bonding region J of the liquid crystal panel PNL and the backlight unit BLU like the liquid crystal display 100 shown in FIG. 6 , the liquid crystal panel PNL and In a state in which the backlight unit BLU is in complete contact, the light-shielding adhesive resin 118 is applied to come into contact with the side surface of the liquid crystal panel PNL and the side surface of the backlight unit BLU.

The adhesive resin adhesion step 16 includes a curing process of curing the light-shielding adhesive resin 118 . The curing process may be performed in various ways depending on the curing characteristics of the light-shielding adhesive resin 118 . For example, when the light-shielding adhesive resin 118 has UV curing properties, a UV light irradiation process may be performed, and when the light-shielding adhesive resin 118 has thermal curing properties, heat is applied to the light-shielding adhesive resin 118 A process of adding or curing naturally at room temperature may be performed.

Although the curing process according to the curing characteristics of the light-shielding adhesive resin 118 is performed, depending on the viscosity of the light-shielding adhesive resin 118, the light-shielding adhesive resin 118 flows down from the sides of the liquid crystal panel (PNL) and the backlight unit (BLU). Or it may be formed to have a longer width than necessary. Therefore, the manufacturing method 10 of the liquid crystal display device spreads over a large area unnecessarily from the side of the liquid crystal panel (PNL) and the backlight unit (BLU) to remove the cured light blocking adhesive resin 118 (18) may include As described above, the light-shielding adhesive resin 118 applied to the side surfaces of the liquid crystal panel (PNL) and the backlight unit (BLU) and cured is to be removed by grinding or other cutting methods (e.g., laser cutting, wheel cutting). can At this time, the extension portion POL_EX of the upper polarizing plate POL_U corresponding to the portion where the light blocking adhesive resin 118 is removed is also removed. By fixing the liquid crystal panel (PNL) and the backlight unit (BLU) and removing a portion exceeding the width (W) of the light-shielding adhesive resin 118 required to provide a light leakage prevention effect and an external shock mitigation effect, etc. The size of the bezel area of the liquid crystal display 100 can be minimized.

The manufacturing method 10 of the liquid crystal display device includes a cover glass process step 20 of attaching a cover glass 116 to the outer surface of the liquid crystal panel PNL in a state in which the liquid crystal panel PNL and the backlight unit BLU are bonded to each other. ) is included. The cover glass 116 may be attached to the outer surface of the upper polarizer POL_U using an optical clear adhesive film (OCA) or an optical clear adhesive resin (OCR). After the cover glass 116 is attached to the liquid crystal panel PNL, a cutting process of removing unnecessary portions from the light blocking adhesive resin 118 and the upper polarizing plate POL_U cannot be performed. Accordingly, in the method 10 of manufacturing the liquid crystal display including the cutting process step 18 , the cover glass process step 20 is performed after the cutting process step 18 .

When a portion of the extension portion POL_EX of the upper polarizing plate POL_U is removed together with a portion of the light-shielding adhesive resin 118 in the above-described cutting process step 18, a defect in which the end of the upper polarizing plate POL_U is damaged may occur. . For example, in the case of using the laser cutting/scribing method, if the laser intensity and irradiation time cannot be stably adjusted, the tip (cut portion) of the upper polarizing plate (POL_U) is bent up from the plane of the upper polarizing plate (POL_U). or you can go down In addition, when the wheel cutting/scribing method is used, the end (cut portion) of the upper polarizing plate POL_U may be split or crack may occur, thereby reducing the rigidity of the liquid crystal panel PNL.

In order to minimize the width of the light-shielding adhesive resin 118 on the side of the liquid crystal panel (PNL) and the backlight unit (BLU) and at the same time reduce the production defect rate according to the cutting process step 18, the light-shielding adhesive from the adhesive resin bonding step 16 It is necessary to adjust the width of the resin 118 . That is, the cutting process step 18 may be omitted by limiting the increase in the width W due to the thixotropy of the light blocking adhesive resin 118 until the completion of the curing process of the light blocking adhesive resin 118 .

For example, by placing a block jig on the side of the liquid crystal panel (PNL) and the backlight unit (BLU) until the curing process of the light-shielding adhesive resin 118 is completed, on the side of the liquid crystal panel (PNL) and the backlight unit (BLU) The width of the applied light-shielding adhesive resin 118 may be adjusted.

8 is a liquid crystal display device in which a separate cutting process step is omitted by adjusting the width of the light-shielding adhesive resin 118 applied to the side surfaces of the liquid crystal panel (PNL) and the backlight unit (BLU) using a block jig. It is a figure explaining the manufacturing method 10b. Referring to FIG. 8 , the backlight unit BLU assembled in the BLU assembly step 14 is disposed on the liquid crystal panel PNL manufactured in the panel process step 12 . The upper polarizing plate POL_U of the liquid crystal panel PNL includes a lower polarizing plate POL_L, a lower substrate 212, and an extension POL_EX that extends further in the outer direction of the liquid crystal panel PNL compared to the upper substrate 214. have. In the present embodiment, the width of the extension portion POL_EX is equal to or shorter than the width of the extension portion POL_EX remaining after the cutting process step 18 is performed in the method 10a of FIG. 7 . there may be For example, the width of the extension POL_EX may be 0.5 mm or less than 0.5 mm. In other words, the end of the upper polarizing plate POL_U may be positioned outside the liquid crystal panel PNL by a distance of about 0.5 mm or less than 0.5 mm from the end of the upper substrate 102 .

In the manufacturing method 10b of the liquid crystal display device, the manufacturing method 10b of the liquid crystal display device is simplified and the time required for manufacturing the liquid crystal display device 100 can be reduced by omitting the cutting process step and changing the process sequence. have. In detail, since the width of the light-shielding adhesive resin 118 is controlled by using a block jig in the method 10b of the liquid crystal display manufacturing method 10b, the cutting process step 18 of the liquid crystal display manufacturing method 10a. ) is omitted. Therefore, as shown in FIG. 8 , the cover glass process step 20 may be performed before the adhesive resin bonding step 16 . The cover glass process 20 is easy to proceed in conjunction with various operations involved in the panel process step 12 in the process process. However, since it is difficult to proceed with the cutting process step 18 when the cover glass 116 is attached, in the liquid crystal display manufacturing method 10a including the cutting process step 18, the adhesive resin bonding step 16 and After the cutting process step 18, the cover glass process step 20 must proceed.

On the other hand, in the manufacturing method 10b of the liquid crystal display device, since the cutting process step is omitted, the cover glass process step 20 and the panel process step 12 are continuously performed or various operations involved in the cover glass process step 20 are performed. These may be included in the panel process step 12 . For example, after the process of bonding the cover glass 116 and the upper polarizing plate POL_U to each other is performed, the backlight unit BLU is placed on the back of the liquid crystal panel PNL and the light blocking adhesive resin 118 is applied. may proceed in sequence.

In the adhesive resin bonding step 16b, a block jig is disposed on the side of the liquid crystal display 100 . In this case, the side surface of the block jig facing the side surface of the liquid crystal panel PNL and the side surface of the backlight unit BLU may be disposed to contact the extension part POL_EX of the upper polarizing plate POL_U. Since the end of the upper polarizing plate POL_U extends more outwardly than the ends of the other substrates of the liquid crystal panel PNL, the lower polarizing plate POL_L, the lower substrate 104 and the upper facing the block jig Between the outermost side of the substrate 102 and the block jig, there is an application space in which the light-shielding adhesive resin 118 can be applied. The light-shielding adhesive resin 118 is filled in this space so that the light-shielding adhesive resin 118 is formed on the inner surface of the upper polarizing plate (POL_U), the side of the upper substrate 102, the side of the lower substrate 104, and the lower polarizing plate ( It passes through the side surface of the POL_L and comes into contact with a part of the side surface of the backlight unit BLU. In other words, the light-blocking adhesive resin 118 may not be applied over the entire side surface of the backlight unit BLU. For example, in the case of a liquid crystal display having a height of 1 mm from the lower surface of the upper polarizing plate POL_U to the rear surface of the lower cover 112, the height of the light-shielding adhesive resin 118 filled in the application space is 0.8 mm to It can be 0.9mm. By applying the light-shielding adhesive resin 118 to the extent that it does not completely fill the application space, it is possible to prevent the light-shielding adhesive resin 118 from overflowing to the rear surface of the lower cover 112 .

After the light-shielding adhesive resin 118 is filled in the application space between the liquid crystal display device 100 and the block jig, a curing process according to the curing characteristics of the light-shielding adhesive resin 118 is performed. For example, when the light blocking adhesive resin 118 has UV curing characteristics, a UV light irradiation process may be performed, and when the light blocking adhesive resin 118 has thermal curing characteristics, a thermal curing process may be performed. When the block jig is removed after the light-shielding adhesive resin 118 is cured, the liquid crystal display 100 having a reduced bezel size can be obtained without performing a cutting process. After the light-shielding adhesive resin 118 is cured, the light-shielding adhesive resin 118 and the block jig do not stick to each other and are easily separated from the cured light-shielding adhesive resin 118. A surface treatment to reduce adhesion with the adhesive resin 118 may be applied. For example, a surface of a block jig forming a space in which the light-shielding adhesive resin 118 is applied together with the side surface of the liquid crystal display device 100 may be coated with Teflon.

By omitting the cutting process 18 as described above, the side effect of cutting the extension POL_EX of the upper polarizing plate POL_U can be solved, and the manufacturing time of the liquid crystal display 100 can be reduced.

The width and shape of the light blocking adhesive resin 118 disposed on the side surface of the liquid crystal display 100 may be adjusted according to the shape of the block jig. For example, in a block jig, a portion corresponding to the backlight unit BLU may protrude toward the backlight unit BLU. Accordingly, the light-blocking adhesive resin 118 may have the same width on the side of the liquid crystal panel PNL and the side of the backlight unit BLU, or a difference in width may be maintained within a predetermined range. Of course, the shape of the light-shielding adhesive resin 118 disposed on the side of the liquid crystal display 100 and the shape of a block jig for this are not limited to the above-described embodiment and may be variously changed.

The block jig may have a shape that facilitates the application of the light-shielding adhesive resin 118 in the application space between the liquid crystal display device 100 and the block jig. For example, as shown in FIG. 8 , the block jig may have a slanted corner toward the space filled with the light-shielding adhesive resin 118 . Accordingly, even if the position of the discharge part (Nozzle) is changed when the light-shielding adhesive resin 118 is applied, the light-shielding adhesive resin 118 is applied between the liquid crystal display device 100 and the block jig (Space) can flow into In FIG. 8 , only a portion of the corner of the block jig is shown to be inclined, but the entire surface of the block jig facing the liquid crystal display 100 may be inclined.

In the liquid crystal display manufacturing method 10b using the block jig described above, the block jig determines the width and shape of the light-shielding adhesive resin 118 applied to the side surface of the liquid crystal display 100 . It may be used for curing the light-shielding adhesive resin 118 as well as for the purpose.

For example, when the light-shielding adhesive resin 118 is cured by UV light, the block jig may be formed of a transparent material (e.g., glass, transparent plastic) that can transmit UV light. In addition, a UV light source is embedded in a block jig to form a space where the light-shielding adhesive resin 118 is applied, and it can also be used for curing the light-shielding adhesive resin 118 . In this case, at least a portion of UV light for curing the light-shielding adhesive resin 118 may be irradiated through a block jig from the side of the light-shielding adhesive resin 118 . In order to reduce the bezel size of the liquid crystal display device 100, the width W2 of the light-shielding adhesive resin 118 applied to the side surface of the liquid crystal display device 100 is the width W2 of the light-shielding adhesive resin 118 applied to the application space. Since it is thinner than the thickness (i.e., depth), compared with curing the light-shielding adhesive resin 118 by irradiating UV light from the upper or lower side of the application space (Space), it is possible to lower the intensity of UV light and shorten the irradiation time. . Of course, along with irradiating UV light through a block jig, UV light may also be irradiated from the upper or lower side of the application space.

When the light-shielding adhesive resin 118 is cured by heat, a block jig may be heated to be used for curing the light-shielding adhesive resin 118 .

As described above, the light-shielding adhesive resin 118 used in the liquid crystal display device 100 of the present invention adheres the liquid crystal panel PNL and the backlight unit BLU to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU. It plays a role in preventing light from leaking out. In order to enhance the light leakage prevention effect, an optical density (OD) level of the light blocking adhesive resin 118 may be increased. That is, by forming the light blocking adhesive resin 118 with a material having a lower light transmittance, the light leakage prevention effect can be enhanced. However, the higher the OD value, the lower the transmittance of UV light, so the UV curing process becomes difficult, such as the need to increase the amount of UV irradiation and the UV irradiation time in order to cure the light-shielding adhesive resin 118 .

Accordingly, in the method of manufacturing a liquid crystal display according to an embodiment of the present invention, the bonding resin bonding step 16 includes a plurality of adhesive resin coating processes and a plurality of curing processes. For example, the adhesive resin bonding step 16 may be performed through a primary adhesive resin application and curing process, and a second adhesive resin application and curing process.

9 is a view for explaining a method of manufacturing a liquid crystal display device using the adhesive resin bonding step 16 including a plurality of adhesive resin coating processes and a plurality of curing processes described above.

In FIG. 9 , the first adhesive resin layer 118a is applied to the space between the liquid crystal display 100 and the block jig and cured. After the application of the first adhesive resin layer 118a and the curing process thereof, the second adhesive resin layer 118b is applied and cured to cover the first adhesive resin layer 118a. At this time, the arrangement of the block jig is continuously maintained.

That is, each of the first adhesive resin layer 118a and the second adhesive resin layer 118b is a part of the light-shielding adhesive resin 118 applied over the side surface of the liquid crystal panel PNL and the side surface of the backlight unit BLU, Curing of the first adhesive resin layer 118a and curing of the second adhesive resin layer 118b are sequentially performed. Therefore, the OD of the first adhesive resin layer 118a and the second adhesive resin layer 118b is easier than curing the entire light-shielding adhesive resin 118 between the liquid crystal display device 100 and the block jig at the same time. It can satisfy both level conditions and curing conditions. In other words, since each of the first adhesive resin layer 118a and the second adhesive resin layer 118b having a thickness lower than the total thickness of the light blocking adhesive resin 118 is sequentially divided and cured, the adhesive resin layer 118 Compared to the OD value of the adhesive resin layer 118 required to cure the entirety at once, even if the OD value of each of the first adhesive resin layer 118a and the second adhesive resin layer 118b is increased, curing is performed at the same curing rate. can be achieved

Each of the first adhesive resin layer 118a and the second adhesive resin layer 118b may be formed of one of a photocurable resin, a thermosetting resin, a hot-melt resin, or a wet resin. In an embodiment of the present invention, the first adhesive resin layer 118a and the second adhesive resin layer 118b may have different OD levels. For example, the first adhesive resin layer 118a may have a higher OD level than that of the second adhesive resin layer 118b. In this case, in order to block light leakage from the bonding area J between the liquid crystal panel PNL and the backlight unit BLU, the first adhesive resin layer 118a is formed in the bonding area between the liquid crystal panel PNL and the backlight unit BLU. It is preferable to apply enough to be in contact with a part of the side surface of the backlight unit BLU through (J). The second adhesive resin layer 118b may contact only the side surface of the backlight unit BLU without directly contacting the side surface of the liquid crystal panel PNL according to the height of the first adhesive resin layer 118a.

Also, in one embodiment of the present invention, the first adhesive resin layer 118a and the second adhesive resin layer 118b may be made of a material having different curing characteristics, respectively. For example, the first adhesive resin layer 118a is composed of one of a photocurable resin, a thermosetting resin, a hot-melt resin, or a wet resin, and the second adhesive resin layer 118b is a photocurable resin, a thermosetting resin, or a hot resin. -Melt resin or wet resin may be formed of one of the remaining resins except for the resin used as the first adhesive resin layer 118a. For example, the first adhesive resin layer 118a may be made of a hot melt adhesive resin, and the second adhesive resin layer 118b may be made of a photocurable resin. In this case, since the first adhesive resin layer 118a does not need to pass UV light, it may have a higher OD level than that of the second adhesive resin layer 118b.

Also, the first adhesive resin layer 118a and the second adhesive resin layer 118b may have different viscosities. For example, the first adhesive resin layer 118a is formed of a material having a higher viscosity than that of the second adhesive resin layer 118b, so that the first adhesive resin layer 118a is a bonding region J between the liquid crystal panel PNL and the backlight unit BLU. The resin layer 118a may be prevented from penetrating or may be formed of a low-viscosity material to flow into the junction region J between the liquid crystal panel PNL and the backlight unit BLU to be easily interposed therebetween.

FIG. 10 shows that, according to another embodiment of the present invention, a light-shielding adhesive resin 118 is applied to the side surfaces of the liquid crystal panel PNL and the backlight unit BLU to fix the liquid crystal panel PNL and the backlight unit BLU. It is a cross-sectional view showing the liquid crystal display device 100 . Referring to FIG. 10 , the light-blocking adhesive resin 118 is formed on the inner side of the cover glass 116 (i.e., the side facing the droplet display panel), the side of the liquid crystal panel PNL, and at least the side of the backlight unit BLU. Contact with some and fix them.

The cover glass frame 120 protrudes from the inner surface of the cover glass 116 toward the liquid crystal panel PNL and the backlight unit BLU. It is spaced apart from the side surfaces of the liquid crystal panel PNL and the backlight unit BLU to form an application space. That is, a space between the cover glass frame 120 from the side surfaces of the liquid crystal panel PNL and the backlight unit BLU is filled with the light blocking adhesive resin 118 .

The upper polarizing plate POL_U may be provided with an extension POL_EX that further extends outwardly by a predetermined distance from the end of the lower polarizing plate POL_L, and the end of the upper polarizing plate POL_U is the cover glass frame 120 . It may be in contact with the side or may be spaced apart by a predetermined distance. When the end of the upper polarizing plate POL_U is spaced apart from the cover glass frame 120 , the light blocking adhesive resin 118 is formed on the lower surface of the cover glass 116 and the cover glass frame 120 as shown in FIG. 7 . The side surface, the side surface of the liquid crystal panel PNL, and the side surface of the backlight unit BLU are in contact with each other and fixed to each other. When the end of the upper polarizing plate (POL_U) is in contact with the cover glass frame 120, the light blocking adhesive resin 118 is the lower surface of the upper polarizing plate (POL_U), the side of the cover glass frame 120, the upper polarizing plate (POL_U) In contact with the side surface of the liquid crystal panel PNL and the side surface of the backlight unit BLU except for fixing them to each other.

In the embodiment shown in FIG. 10 , the liquid crystal panel PNL and the backlight unit BLU are adhered to each other by the light-shielding adhesive resin 118 applied to the side surface, and a bonding area between the liquid crystal panel PNL and the backlight unit BLU. A separate light-shielding adhesive resin 118 is not interposed in (J). That is, in the portion where the light-shielding adhesive resin 118 is applied to the side surface of the liquid crystal display device 100, a separate light-shielding adhesive resin 118 is not disposed between the lower surface of the liquid crystal panel PNL and the upper surface of the backlight unit BLU. it may not be However, in areas other than the portion where the light-shielding adhesive resin 118 is applied between the liquid crystal display device 100 and the cover glass frame 120 , the light-shielding adhesion between the lower surface of the liquid crystal panel PNL and the upper surface of the backlight unit BLU A resin 118 may be interposed therebetween. In addition, in order to enhance the fixing force between the liquid crystal panel (PNL) and the backlight unit (BLU) and the effect of preventing light leakage, or to implement a pressure sensor in the liquid crystal display device 100 , light-shielding adhesion is applied to the sides of the liquid crystal panel (PNL) and the backlight unit (BLU). In the region where the resin 118 is applied, an additional light-blocking adhesive resin 118 may be interposed between the lower surface of the liquid crystal panel PNL and the upper surface of the backlight unit BLU.

In the liquid crystal display 100 of the embodiment shown in FIG. 10 , the width of the light blocking adhesive resin 118 is adjusted by the distance between the cover glass frame 120 and the liquid crystal panel PNL and the backlight unit BLU. Therefore, even in the process of manufacturing the liquid crystal display device 100 of FIG. 10 , a cutting process of removing a part of the light blocking adhesive resin 118 and the upper polarizing plate POL_U is not performed, and the liquid crystal panel PNL and the cover glass 116 are not performed. ) adhesion may be made before the application of the light-shielding adhesive resin 118 or by using the light-shielding adhesive resin 118 .

11 is a diagram illustrating a schematic manufacturing method 10c of manufacturing the liquid crystal display 100 shown in FIG. 10 . Referring to FIG. 11 , a method 10c of manufacturing a liquid crystal display using a cover glass frame 120 includes a panel process step 12 of manufacturing a liquid crystal panel PNL. The panel processing step 12 may be performed in a similar manner to the liquid crystal display manufacturing methods 10a and 10b described with reference to FIGS. 7 and 8 , and the detailed process method of the panel processing step 12 is It may be variously modified according to the structure of the liquid crystal panel PNL. In the panel process step 12 , the upper polarizing plate POL_U of the liquid crystal panel PNL is formed to have an extension POL_EX that extends more outwardly than the lower polarizing plate POL_L, or the upper polarizing plate POL_U and the lower polarizing plate POL_L ) may be formed to have the same length.

In this embodiment, the cover glass frame 120 forms an application space for applying the light-shielding adhesive resin 118 . Therefore, the cover glass process step 20 of attaching the cover glass 116 and the cover glass frame 120 on the liquid crystal panel PNL before the adhesive resin bonding step 16 of applying the light blocking adhesive resin 118 is performed. it must go on The cover glass guide frame 120 may be attached to the cover glass 116 before or after the cover glass 116 is attached to the liquid crystal panel PNL.

In addition to the panel processing step 12, the BLU assembly step 14 proceeds. As described above, the BLU assembly step 14 may be performed separately from the panel processing step 12 . That is, the order of the panel processing step 12 and the BLU assembly step 14 may be changed. The backlight unit BLU assembled through the BLU assembly step 14 is disposed on the cover glass 116 and the liquid crystal panel PNL, and the side surface of the liquid crystal panel PNL and the side surface of the backlight unit BLU and the cover glass An application space for applying the light-shielding adhesive resin 118 is formed between the frames 120 .

In the adhesive resin bonding step 16 , the light-shielding adhesive resin 118 is filled into this space. The light-shielding adhesive resin 118 is a cover glass frame ( 120) is applied to be in contact with the inner surface. As described above, when the extended portion POL_EX of the upper polarizing plate POL_U is formed to be in contact with the cover glass frame 120 , the light-blocking adhesive resin 118 is the lower surface of the upper polarizing plate POL_U, and the upper polarizing plate POL_U is not included in the liquid crystal It is applied so as to be in contact with the side surface of the panel PNL, the side surface of the backlight unit BLU, and the inner surface of the cover glass frame 120 facing the liquid crystal panel PNL and the backlight unit BLU.

After application of the adhesive resin 118 , a curing process according to the curing characteristics of the light-shielding adhesive resin 118 is performed. For example, when the light blocking adhesive resin 118 has UV curing characteristics, a UV light irradiation process may be performed, and when the light blocking adhesive resin 118 has thermal curing characteristics, a thermal curing process may be performed. The light blocking adhesive resin 118 filled in the application space between the liquid crystal display device 100 and the cover glass frame 120 is cured to form the liquid crystal panel PNL and the backlight unit BLU with the cover glass 116 and the cover. It is fixed together with the glass frame 120 .

In the liquid crystal display 100 of the embodiment shown in FIG. 10 , the width of the light blocking adhesive resin 118 is adjusted by the distance between the cover glass frame 120 and the liquid crystal panel PNL and the backlight unit BLU. Accordingly, in the liquid crystal display manufacturing method 10c of FIG. 11 , the cover glass frame 120 replaces the role of a block jig in the liquid crystal display manufacturing method 10b described with reference to FIG. 8 . Accordingly, similar to the manufacturing method of FIG. 8 , the liquid crystal display 100 having a reduced bezel size can be manufactured without the cutting process step 18 of removing a portion of the light-shielding adhesive resin 118 and the upper polarizing plate POL_U.

The cover glass frame 120 may have a shape that facilitates the application of the light blocking adhesive resin 118 to the space between the liquid crystal display device 100 and the cover glass frame 120 . For example, as shown in FIGS. 10 and 11 , the upper corner (Corner) of the liquid crystal display device 100 side of the cover glass frame 120 is inclined toward the space filled with the light-shielding adhesive resin 118 is applied. Even if the position of the nozzle for applying the adhesive resin is changed, the light blocking adhesive resin 118 may flow into the space between the liquid crystal display device 100 and the cover glass frame 120 . 10 and 11 , only a portion of the edge of the cover glass frame 120 is shown to be inclined, but in another embodiment, the entire surface of the cover glass frame 120 facing the liquid crystal display device 100 may be inclined. have.

12 is a method of manufacturing a liquid crystal display device by securing an application space of the light-shielding adhesive resin 118 using the cover glass frame 120 according to an embodiment of the present invention, the adhesive resin bonding step ( 16) is a diagram for explaining a method in which a plurality of adhesive resin application processes and a plurality of curing processes are included. As shown in FIG. 12 , the first adhesive resin 118a is applied to the coating space between the liquid crystal panel PNL and the cover glass frame 120 and cured through a first curing step, then the first adhesive The second adhesive resin 118b may be applied to cover the resin 118a and cured through a second curing step.

Since each of the first adhesive resin layer 118a and the second adhesive resin layer 118b having a thickness lower than the total thickness of the light blocking adhesive resin 118 is sequentially divided and cured, the first adhesive resin layer 118A and Even if the OD level of each of the second adhesive resin layers 118B is maintained high, curing thereof can be easily achieved.

As described with reference to FIG. 9 , the first adhesive resin layer 118a and the second adhesive resin layer 118b may have different OD levels. For example, the first adhesive resin layer 118a may have a higher OD level than that of the second adhesive resin layer 118b. In this case, in order to block light leakage from the bonding area J between the liquid crystal panel PNL and the backlight unit BLU, the first adhesive resin layer 118a is formed in the bonding area between the liquid crystal panel PNL and the backlight unit BLU. It is preferable to apply enough to be in contact with a part of the side surface of the backlight unit BLU through (J). The second adhesive resin layer 118b may contact only the side surface of the backlight unit BLU without directly contacting the side surface of the liquid crystal panel PNL according to the height of the first adhesive resin layer 118a.

Also, as described with reference to FIG. 9 , the first adhesive resin layer 118a and the second adhesive resin layer 118b may be made of a material having different curing characteristics. For example, the first adhesive resin layer 118a may be made of a hot melt adhesive resin, and the second adhesive resin layer 118b may be made of a photocurable resin. In this case, since the first adhesive resin layer 118a does not need to pass UV light, it may have a higher OD level than that of the second adhesive resin layer 118b.

Also, as described with reference to FIG. 9 , the first adhesive resin layer 118a and the second adhesive resin layer 118b may have different viscosities. For example, the first adhesive resin layer 118a is formed of a material having a higher or lower viscosity than the second adhesive resin layer 118b, and is formed as a bonding region J between the liquid crystal panel PNL and the backlight unit BLU. 1 The interposition of the adhesive resin layer 118A may be controlled.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (18)

manufacturing a liquid crystal panel;
disposing a backlight unit on a rear surface of the liquid crystal panel;
arranging a block jig on side surfaces of the liquid crystal panel and the backlight unit to form a light-shielding adhesive resin coating space between the liquid crystal panel and the backlight unit and the block jig;
fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space; and
removing the block jig from the light-shielding adhesive resin,
The step of fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space,
applying a first adhesive resin layer in contact with the lower surface of the upper polarizing plate of the liquid crystal panel;
curing the first adhesive resin layer;
applying a second adhesive resin layer to cover the first adhesive resin layer, but not to contact the lower surface of the upper polarizing plate of the liquid crystal panel; and
Comprising the step of curing the second adhesive resin layer,
The method of manufacturing a liquid crystal display device, wherein the optical density value of the first adhesive resin layer is higher than the optical density value of the second adhesive resin layer. The method of claim 1,
Placing a cover glass on the outer surface of the liquid crystal panel before fixing the liquid crystal panel and the backlight unit by applying a light-shielding adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig. A method of manufacturing a liquid crystal display device. 3. The method of claim 2,
In the manufacturing of the liquid crystal panel, an upper polarizing plate of the liquid crystal panel is manufactured to have an extension extending in an outer direction compared to the upper, lower, and lower polarizing plates of the liquid crystal panel. 4. The method of claim 3,
In the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig is disposed so as to be in contact with an end of the extension part. 5. The method of claim 4,
The step of fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space is such that the light-shielding adhesive resin is in contact with the inner surface of the extension part, the side surface of the liquid crystal panel, and the side surface of the backlight unit. A method of manufacturing a liquid crystal display device, characterized in that it is applied. 4. The method of claim 3,
In the step of disposing the block jig on the side surfaces of the liquid crystal panel and the backlight unit, the block jig is disposed to be spaced apart from an end of the extension part by a predetermined distance. 7. The method of claim 6,
The step of fixing the liquid crystal panel and the backlight unit by applying an adhesive resin to the space between the liquid crystal panel and the backlight unit and the block jig includes applying the adhesive resin to the inner surface of the extension part, the inner surface of the cover glass, and the liquid crystal panel. A method of manufacturing a liquid crystal display device, characterized in that the coating is applied so as to be in contact with the side surface of the backlight unit and the side surface of the backlight unit. 3. The method of claim 2,
In the step of manufacturing the liquid crystal panel, the liquid crystal panel is manufactured to be longer than the backlight unit in at least one axis, and in the step of disposing the backlight unit on the rear surface of the liquid crystal panel, the liquid crystal panel further extends to at least one side of the backlight unit A method of manufacturing a liquid crystal display device. 9. The method of claim 8,
In the step of arranging the block jig on side surfaces of the liquid crystal panel and the backlight unit to form a light-shielding adhesive resin coating space between the liquid crystal panel and the backlight unit and the block jig, the block jig is the backlight unit A method of manufacturing a liquid crystal display device disposed in contact with an end of the liquid crystal panel further extended to at least one side of the unit. 10. The method of claim 9,
In the step of fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space, the light-shielding adhesive resin is applied to the inner surface of the liquid crystal panel, the side surface of the liquid crystal panel, and the side surface of the backlight unit. A method of manufacturing a liquid crystal display device, characterized in that it is applied so as to 9. The method of claim 8,
In the step of arranging the block jig on side surfaces of the liquid crystal panel and the backlight unit to form a light-shielding adhesive resin coating space between the liquid crystal panel and the backlight unit and the block jig, the block jig is the backlight unit A method of manufacturing a liquid crystal display device, which is disposed to be spaced apart by a predetermined distance from an end of the liquid crystal panel that is further extended to at least one side of the unit. 12. The method of claim 11,
The step of fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space includes applying the light-shielding adhesive resin to the inner surface of the liquid crystal panel, the inner surface of the cover glass, the side surface of the liquid crystal panel, and the A method of manufacturing a liquid crystal display device, characterized in that the coating is applied so as to be in contact with the side surface of the backlight unit. The method of claim 1,
The light-shielding adhesive resin applied to the light-shielding adhesive resin application space has a viscosity of 20,000 cps to 45,000 cps, and a thixotropic property of 3 to 6. According to claim 1,
The light-shielding adhesive resin is a method of manufacturing a liquid crystal display device, characterized in that it has an optical density of 1.4 or more at a thickness of 0.33 mm. delete delete According to claim 1,
The first adhesive resin layer is composed of a wet resin, and the second adhesive resin layer is a photocurable resin. The method of claim 1,
The step of fixing the liquid crystal panel and the backlight unit by applying the light-shielding adhesive resin to the light-shielding adhesive resin application space,
and curing at least a portion of the light-shielding adhesive resin by emitting ultraviolet light through the block jig.

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