KR102355832B1 - Display Device having Multiple Display Panel - Google Patents

Abstract

In embodiments of the present invention, in a multi-panel display device formed by connecting a plurality of individual display devices, an optical member including an inclined reflective surface and a refractive lens unit is disposed on the upper part of the multi-panel display device to connect panels even at a large horizontal viewing angle Ensuring image continuity in parts.

Description

{Display Device having Multiple Display Panel}

Embodiments of the present invention relate to a multi-panel display device in which a plurality of individual display devices are connected and used as one large-size image output device, which can secure image continuity in the connection portion of the individual display devices. will be.

As the information society develops, the demand for display devices for displaying images is increasing in various forms, and in recent years, liquid crystal displays, plasma display devices, organic light emitting displays Various display devices such as Light Emitting Display Device) are being used.

On the other hand, a large-sized display device is required for commercial purposes or the like.

However, according to the present technology, since there is a limit to the size of the display panel constituting the display device, a multi-panel display device that displays a single image by connecting a plurality of display panels or individual display devices to a large-sized display device has been developed. is being used Such a multi-panel display device is also expressed as a video wall or the like.

On the other hand, each display panel or individual display device constituting such a multi-panel display device includes a central display area in which an image is displayed and a non-display area disposed around the display area in which an image is not displayed.

The non-display area has a frame shape that is formed to have a constant width while surrounding the edge of the display panel, and this non-display area may be expressed as a bezel. The non-display area or the bezel area is an essential part in which a gate driving circuit, a data driving circuit, or various signal lines for driving a display panel are formed.

Recently, research has been conducted to realize a narrow bezel by minimizing the bezel area in a display device, but there is a limit to realizing the width of the bezel area to a certain size or less.

On the other hand, in the case of a multi-panel display device, since a plurality of individual display devices are connected to each other, the bezel area of the individual display device is double arranged at the connection part of the individual display devices, and thus the non-display area is large at the connection part of the individual display devices. will lose For this reason, when one image is displayed on a multi-panel display device, a problem occurs in that the image is cut off at such a connection part.

That is, in the case of a multi-panel display device implemented by connecting a plurality of individual display devices, except for the ideal case of a zero bezel, there is a problem in that the image discontinuity appears at the panel connection part, and a solution for this this is required

On the other hand, in order to solve the problem of image discontinuity in the panel connection part of the multi-panel display device, research is being conducted to arrange a certain optical means in the panel connection part. Although the phenomenon is partially improved, there is a problem that image discontinuity still exists when the viewing angle is increased.

Accordingly, it is an object of the embodiments of the present invention to provide a multi-panel display device in which the image discontinuity problem in the connection portion of the individual display device is improved.

Another object of the embodiments of the present invention is to provide a multi-panel display device in which the image discontinuity problem in the connection portion of the individual display devices is improved even when the horizontal viewing angle is large.

Another object of the embodiments of the present invention is to provide a multi-panel display device capable of securing image continuity in a panel connection portion even at a large horizontal viewing angle by arranging an optical member having both reflection and refraction characteristics on the top of the multi-panel display device. will provide

Another object of the embodiments of the present invention is to provide a multi-panel display capable of securing image continuity in the panel connection part even at a large horizontal viewing angle by arranging an optical member including an inclined reflective surface and a refractive lens unit on the upper part of the multi-panel display device. to provide the device.

In addition, by arranging a high-resolution area at the edge of the display panel of an individual display device to compensate for the resolution and image quality of the image near the connection part of the multi-panel display device, the resolution or quality of the entire image displayed on the multi-panel display device is improved. It has the effect of keeping it uniform.

In order to achieve this object, according to an embodiment of the present invention, a plurality of individual display devices are connected to each other, and the display panel part includes a connection part to which non-display areas of the individual display devices are connected, and the display panel part. It is disposed on the upper portion, and includes at least a slanted reflective surface on the side to cover at least a portion of the upper portion of the connection part and inclined to have a first inclination angle with the vertical direction of the display device, Provided is a multi-panel display including an optical member including a refractive lens unit configured to refract transmitted light to the outside.

1 shows a multi-panel display device to which this embodiment can be applied, (a) is a plan view, and (b) is an enlarged cross-sectional view of each panel connection portion of the multi-panel display unit.
FIG. 2 shows an example of a refractive optical member that enlarges and displays a connection part of a multi-panel display, and an image in a front view when using the same.
FIG. 3 shows an example of an image recognized by a user and an optical path in a diagonal gaze direction in which the viewing angle is greater than or equal to a certain level when the refractive optical member shown in FIG. 2 is used.
4 is a cross-sectional view of a multi-panel display device according to an embodiment of the present invention.
5 shows an optical member used in an embodiment of the present invention, and shows only a unit optical member corresponding to one individual display device.
6 shows several embodiments of the refractive lens unit formed on the optical member according to the embodiment of the present invention, (a) is a Fresnel lens (Fresnel Lens), (b) is a case in which a convex lens is used, , (c) shows a structure in which the refractive lens unit is formed on a separate lens plate or lens film and then adheres to the unit base plate.
7 illustrates an optical path in the vicinity of a connection portion of a multi-panel display device when an optical member according to an embodiment of the present invention is used.
8 is a view for explaining the position and size of the inclined reflection surface of the optical member according to an embodiment of the present invention is formed.
9 shows the relationship according to the inclination angle θ of the inclined reflective surface, the thickness T of the optical member, and the relative size of the non-display area 414 of the individual display device, and FIG. 10 is the inclination angle θ of the inclined reflective surface. ) and the thickness (T) of the optical member are shown in the case of different optical paths.
11 is a display panel of an individual display device according to an embodiment of the present invention, showing a configuration including a high-resolution area at the edge and a low-resolution area at the center.
12 is a projected width of the inclined reflecting surface (D _R), the individual display device the width of the non-display region (D _NA), width of the refractive lens (D _L) and a width of the high-resolution area of a display panel (D _H) and the size of the show the relationship

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected”, “coupled” or “connected” through another component.

1 shows a multi-panel display device to which this embodiment can be applied, (a) is a plan view, and (b) is an enlarged cross-sectional view of each panel connection portion of the multi-panel display device.

Referring to FIG. 1 , a typical multi-panel display device 100 is formed by connecting a plurality of individual display devices 200 , and a connection part 300 to which the individual display devices 200 are connected is formed.

Each individual display device 200 alone constitutes a complete display device, and may be implemented as a liquid crystal display (LCD), an organic light emitting display (OLED), or the like, but is not limited thereto.

In the present specification, an individual display device means a single display device constituting a multi-panel display device, and the individual display device may be defined as an individual panel or other expression such as a panel in some cases.

As shown in (b) of FIG. 1 , each individual display device 200 has an active area (A/A; 212) in which an image is displayed in the center of the panel, and an area surrounding the edge of the display area in which an image is displayed. The non-display area N/A 210 is included. The non-display area 210 of each individual display device 200 may be expressed differently as a bezel area or the like.

Meanwhile, each individual display device 200 includes a display panel 222 again, a backlight unit 224 disposed below the display panel to provide light to the display panel, and a support structure 226 surrounding the entire display device. It may be composed of

The display panel 222 is typically manufactured by bonding a first substrate, which is an array substrate, on which thin film transistors, etc. are formed to define a pixel area, and a second substrate, which is an upper substrate, on which a black matrix and/or a color filter layer are formed. Of course, in the case of an OLED display panel, the second substrate may only function as a protective substrate.

In addition, the backlight unit 224 includes a light source module including a light source such as an LED, a holder for fixing the light source, a light source driving circuit, etc., a light guide plate (LGP) or a diffusion plate for diffusing light to the entire panel area, and light a reflector for reflecting the light toward the display panel, an LED flexible circuit that is a circuit for controlling the on/off of the light source, and one or more optical films disposed on the light guide plate for the purpose of improving luminance, diffusion and protection of light, or It may include sub-units such as a sheet.

In addition, the external support member 226 for covering the display device includes a cover bottom and/or a guide panel that surrounds and protects the backlight unit 224 and the display panel 222 in the display device unit. Of course, it may be a back cover in a set electronic device unit, which is a final electronic product including a display device.

On the other hand, as shown in FIG. 1 , each individual display device 200 includes a non-display area (N/A; 210) in which an image is not displayed in a predetermined area of the edge, and the multi-panel display device displays such an individual display device. Since a plurality of devices 200 are connected to each other, an image is not displayed on the connection portion 300 to which each individual display device is connected in the multi-display panel.

Meanwhile, the non-display area N/A 210 of each individual display device 200 covers the non-display area of the display panel 222 itself, a portion covered by the other backlight unit 224 , or the front surface of the display device. The cover may be formed by a case top or a front cover.

Therefore, when a single image is displayed on a multi-panel display device or a video wall as shown in FIG. 1 , an image disconnection phenomenon occurs in which the image is not displayed in the connection part 300 , and a solution is required. became

FIG. 2 shows an example of a refractive optical member that enlarges and displays a connection part of a multi-panel display, and an image in a front view when using the same.

As shown in FIG. 2 , as a method for overcoming the image disconnection phenomenon in the connection part of the multi-panel display device, refraction is disposed on the multi-panel display device to refract or enlarge the optical path near the connection part. A technique using an optical member can be considered.

FIG. 2 shows a configuration using a lens plate disposed on the multi-panel display device as such refractive optical means.

The lens plate 240, which is a refractive optical member used in FIG. 2, is a kind of light-transmitting screen, and is formed near the base plate 242, which is a general light-transmitting plate-like material having a constant thickness, and the connection portion 300 of the multi-panel display device. It includes a lens unit 244 .

The lens unit 244 formed on the lens plate 240 is used to refract an optical path near the connection part 300 , and a Fresnel lens or the like may be used, but is not limited thereto.

As shown in FIG. 2 , when the user 250 is in front of the connection part 300 , the display area adjacent to the lens part 244 of the lens plate 240 is formed on the connection part of the multi-panel display device. Light from the pixels P1 to P4 is refracted by the lens unit 240 and is incident on the user's field of view.

Therefore, when viewed from the front of the multi-panel display device, as shown in the lower view of FIG. 2 , images of adjacent pixels are refracted and projected in the connection part 300 to display a certain image, and thus the image is cut off at the panel connection part It has the effect of compensating the phenomenon to some extent.

As described above, various attempts have been made to overcome the image disconnection problem in the panel connection part by disposing a Fresnel lens plate capable of optical path refraction on the upper part of the multi-panel display device. When used, there is a limit to having such an effect only in the front view.

As shown in FIG. 3 , even if the Fresnel lens plate is disposed on the upper part of the multi-panel display device, if the user's viewing angle deviates from the front (viewing angle = 0) and becomes about 45 degrees or more (α), the view shown in FIG. The furnace is not formed, and the panel connection part 300 is visible as it is.

That is, as shown in FIG. 3, when the viewing angle is α (α > about 45 degrees), some of the light from the pixels near the connection part is not incident on the user who is looking at an angle, and as a result, the bezel of each individual display device is it will be visible as it is.

Accordingly, the image disconnection phenomenon at the panel connection portion as shown in the lower part of FIG. 3 occurs as it is.

The embodiment of the present invention is proposed to compensate for the image disconnection occurring in the connection portion of the multi-panel display device even at a viewing angle greater than or equal to a predetermined angle as described above.

To this end, a plate-shaped optical member having an oblique reflective surface and a refractive lens unit is disposed on the entire surface of the display panel unit of the multi-panel display device according to the embodiment of the present invention.

In this case, the inclined reflective surface reflects the image from the pixels outside the display area of the individual display device while covering the bezel of the individual display device constituting the multi-panel display device, and the refractive lens unit receives the light from the inclined reflective surface. It is refracted and emitted to the outside of the display device.

Accordingly, even when the multi-panel display is observed from a viewing angle greater than or equal to a predetermined viewing angle, it is possible to minimize the image disconnection phenomenon in the connection portion, which is a non-display area of the multi-panel display.

Hereinafter, a configuration of a multi-panel display device according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 11 .

4 is a cross-sectional view of a multi-panel display device according to an embodiment of the present invention, and FIG. 5 shows an optical member used in an embodiment of the present invention, and a unit base plate corresponding to one individual display device. shows only

As shown in FIG. 4 , the multi-panel display device according to an embodiment of the present invention is a large-sized display device in which a plurality of individual display devices are connected to each other, and includes a connection portion in which non-display areas of the individual display devices are connected to each other. It includes a display panel 400 including a display panel, and an optical member 500 disposed on the display panel and including an inclined reflective surface and a refractive lens unit.

The display panel unit 400 corresponds to a display portion of a multi-panel display device in which a plurality of individual display devices 410 are connected to display a single image, and the portion to which the individual display devices are connected includes the display of each individual display device. The bezel or the non-display area 414 (NA) is connected to each other so that there is a portion where an image is not displayed. In the present specification, a boundary region to which such individual display devices are connected is defined as the connection portion 300 .

That is, the connection portion 300 of the multi-panel display device is a non-display area formed in a grid shape over the entire surface of the multi-panel display device, and the width of the connection portion 300 is the non-display area of each individual display device 410 . It has two sizes of (414).

In such a connection part 300, an image disconnection phenomenon occurs in which an image is not displayed, and in order to solve this problem, in this embodiment, an optical member ( 500) is used.

The individual display device 410 that can be used in the embodiment of the present invention may be a liquid crystal display, but is not limited thereto, and includes all types of display devices such as a plasma display and an organic light emitting diode (OLED) display. should be understood

Meanwhile, the individual display device 410 applied to the embodiment of the present invention may include a display panel in which pixels are formed again, and a panel support structure for supporting the display panel such as a cover bottom. Of course, the individual display device 410 is a module composed of only a simple display panel and a driving circuit thereof, and the support structure such as a case may be formed as an entire unit of the multi-panel display device.

That is, “individual display device” in the present specification refers to a device capable of functioning as a complete display device by itself, and includes an array substrate, an upper substrate, and a display material layer (such as a liquid crystal material or an organic light emitting material) disposed therebetween. It is sufficient to include a display panel including the display panel, a driving circuit unit for driving the display panel, and the like, and may not include a support structure such as a bottom cover.

In addition, when the individual display device 410 is a liquid crystal display, the display panel is a liquid crystal panel, and may further include a backlight unit disposed below the liquid crystal panel to provide light to the liquid crystal panel.

On the other hand, when the individual display device 410 is a liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel again includes a plurality of gate lines and data lines, and pixels defined in an intersection region thereof, and in each pixel. An array substrate including a thin film transistor (TFT), which is a switching element for controlling light transmittance, an upper substrate having a color filter and/or a black matrix, and the like, and a liquid crystal material layer formed therebetween. and a touch window may be additionally disposed on the upper front surface of the display panel.

Of course, when the individual display device applied to the embodiment of the present invention is an organic light emitting diode display (OLED), the display panel includes a plurality of gate lines and data lines, and pixels defined in a cross region thereof, and each pixel. It may be composed of an array substrate including a thin film transistor (TFT) as a switching element for selectively applying an electrical signal to the organic electroluminescent material layer provided in the EL material layer, an upper protective substrate, and the like.

The optical member 500 according to this embodiment includes at least an upper part of the connection part 300 and an inclined reflective surface 520 inclined to have a vertical direction B and a first inclination angle θ of the display device; , a pixel of an individual display device or a plate-shaped member including a refractive lens unit 530 for refracting the light transmitted from the oblique reflective surface to the outside.

The optical member 500 according to the present embodiment is a plate-shaped optical means disposed to cover the entire front surface of the multi-panel display device, and is formed by connecting a plurality of unit optical members 500 ′ corresponding to each individual display device. .

FIG. 5 shows only one unit optical member 500' constituting the optical member 500, wherein the unit optical member 500' is a base plate ( 510), the refractive lens unit 530 is disposed on the upper region of the base plate 510 covering the upper region of the connection portion 300, that is, the upper region of the non-display region 414 of the individual display device, The inclined reflective surface 520 is formed on a side inclined cut surface of the base plate 510 .

5 (a) is a perspective view of the optical member, (b) is a bottom view seen from the bottom _{, the inclined reflective surface 520 having a constant width D R} is displayed, (c) is a constant plan view as viewed from the top A refractive lens unit 530 having a width D _{L is indicated.}

That is, by obliquely cutting the side surface of the plate-shaped base plate 510 having a constant thickness T, and applying a metal layer such as silver (Ag) or copper (Al) to the lower side of the inclined cut surface, the inclined reflection surface 520 is formed. can be

The inclined reflective surface 520 forms a constant angle with the vertical direction (B of FIG. 4 ) of the multi-panel display device, and this angle is referred to as a first inclination angle in the present specification.

The inclined reflective surface 520 has a function of blocking the connection part 300 disposed below it so that the bezel of the connection part 300 is not visible from the front view.

In addition, the inclined reflective surface 520 reflects light from a pixel of the display panel unit adjacent to the connection part 300 and transmits the light to the refractive lens unit 530 .

On the other hand, the inclined reflective surface 520 is formed in a region large enough to cover all of the connection portion 300 , and is preferably formed to be larger than a size that covers all of the connection portion 300 .

That is, when describing the region where the inclined reflective surface 520 is projected on the display panel unit 400 , the outermost point (X _{0 in} FIG. 8 ) of the inclined reflective surface 520 is the highest point of the corresponding individual display device. Corresponding to the outer point, the innermost point (X _{1 in} FIG. 8 ) of the inclined reflective surface 520 may be disposed further inside the non-display area 414 of the individual display device 410 .

In this way, by configuring the area of the inclined reflective surface 520 to cover at least all of the non-display area of the individual display device, at least in the front view, the inclined reflective surface 520 is the connecting portion ( 300) can be covered.

On the other hand, the base plate 510 of the optical member 500 is a plate-shaped member having a constant thickness T, and since the inclined reflective surface 520 must be formed to cover all the connection parts 300 , the first inclination angle is the optical member has a certain relationship with the thickness of

That is, the thickness T of the optical member 500 and the first inclination angle θ of the inclined reflective surface 520 may be determined by Equation 1 below.

[Equation 1] T × tanθ = D _R > D _NA (width of non-display area NA of individual display device)

That is, the thickness T of the optical member 500 so as to satisfy Equation 1 according to _{D NA} (ie, 1/2 of the width of the connection part), which is the width of the non-display area 414 (NA) of the individual display device 410 . and a first inclination angle θ of the inclined reflective surface 520 may be determined.

_{On the other hand, in addition to the relationship between the projection width D R} when the oblique reflective surface 520 is projected on the display panel unit 400 _{and the width D NA} of the non-display area of the individual display device, the width D of the refractive lens unit 520 . _{There is also a certain relationship to the size of L and D H} , which is the width of the high-resolution region of the display panel, which will be described below with reference to FIG. 12 , which will be described in more detail below with reference to FIG. 12 .

To this end, the first inclination angle of the inclined reflective surface 520 may be formed to be about 20 to 80 degrees, and the first inclination angle is the width (D _NA ) of the non-display area of the individual display device and the thickness (T) of the optical member. It can be optimally determined by , preferably at least 80 degrees or less.

On the other hand, as will be described later, the inclined reflective surface 520 has a function of reflecting light from pixels in an adjacent display area in addition to a function of blocking the lower connection part, It may reflect or reflect light from the outside of the display device.

Therefore, when the viewing angle is large, the image connection at the connection part may be unnatural, and in order to compensate for this to some extent, a diffusion pattern part formed to reduce the reflectance by sand blasting or scratching is added to the inclined reflective surface 520 . can be provided

That is, by forming a diffusion pattern having a certain diffusion characteristic on the inclined reflective surface 520, even if a discontinuous image is reflected, the discontinuity is less perceived by an observer, thereby realizing a more natural seamless image. have.

The refractive lens unit 530 formed on the upper surface of the optical member 500 performs a function of refracting the light from the inclined reflective surface 520 or a pixel disposed outside the display area again to output the light to the outside of the display device. .

The optical member 500 according to this embodiment is an acrylic transparent optical substrate, and the refractive lens unit 530 may be formed on the base plate 510 by injection, extrusion, or imprinting method, but in such a manner. is not limited to

6 shows several embodiments of the refractive lens unit formed on the optical member according to the embodiment of the present invention, (a) is a Fresnel lens (Fresnel Lens), (b) is a case in which a convex lens is used, , (c) shows a structure in which the refractive lens unit is formed on a separate lens plate or lens film and then adheres to the unit base plate.

The refractive lens unit 530 of the optical member 500 may be formed in a general linear Fresnel lens structure, a plurality of ridges 532 extending long in the longitudinal direction of the connecting portion, and from each ridge to the upper surface of the lens plate The extended diagonal surface 534 may have a structure in which it is repeatedly formed a plurality of times.

On the other hand, the ridge 522 of the Fresnel lens is the highest in the middle of the connection part (B in FIG. 4), and it is preferable that the ridge becomes smaller as it moves to the central region of each individual display device (R1> in FIG. 6). R2) As a result, the angle of refraction at the center of the connecting portion is greatest, so that the light from the farthest outermost pixel P1 is refracted and directed vertically upward of the connecting portion 300 .

FIG. 6B illustrates a case in which a convex lens 530' is used as the refractive lens unit 530 according to another embodiment.

The convex lens that can be used as the refractive lens unit 530 according to the present embodiment starts to form a curved surface in a predetermined area of the display area of each individual display device, and thus the central area of the connection portion 300 of the display panel unit 400 . That is, it may have a structure in which a continuous curved surface is formed so as to have the smallest thickness at the end of the unit optical member 500 ′.

That is, the refractive lens unit 530 by the convex lens 530 ′ also refracts the light transmitted from the inclined reflective surface 520 or adjacent pixels at a predetermined angle to output the light to the outside of the optical member 500 . do.

Meanwhile, as shown in (a) and (b) of FIG. 6 , the refractive lens unit 530 may be directly formed in a partial area on the base plate 510 of the unit optical member, but is not limited thereto.

That is, as shown in (c) of FIG. 6 , a plate or film member 532 having a refractive lens unit formed on one side is separately provided, and the plate or film member 532 may be attached to the upper surface of the base plate 510 ′ on which the inclined reflection surface 520 is formed. .

Comparing the Fresnel lens structure and the convex lens structure used in this embodiment, the Fresnel lens has the advantage of being able to have a thinner lens thickness compared to the convex lens. There may be a disadvantage that the image at 300 is somewhat discontinuous.

Since the linear Fresnel lens or the convex lens structure having such a structure is a technique used in other fields for magnification and/or refraction of light, a detailed description thereof will be omitted herein.

In addition, the refractive lens unit 530 according to the present embodiment is not limited to the above-described Fresnel lens structure or convex lens structure, and light from adjacent pixels by light refraction in the connection portion 300 of the multi-panel display device. Any optical member that can transmit to the outside can be used

Due to the oblique reflective surface 520 and the refractive lens unit 530 of the optical member 500 according to the present embodiment, even if the observer is at a position of a viewing angle greater than or equal to a certain size, a portion of the pixels in the display area adjacent to the connection portion 300 is By being reflected and refracted, the shape of the image discontinuity caused by the connecting portion 300 may be improved to some extent.

Specific technical principles and optical paths according to the present embodiment will be described in more detail below with reference to FIG. 7 .

Meanwhile, the optical member 500 according to this embodiment is made of a light-transmitting material, and the light-transmitting material is a base plate of poly-methyl methacrylate (PMMA), polycarbonate (PC). , polyether sulfone (PES), methacrylate styrene (Methacrylate Styrene; MS) may be at least one polymer synthetic resin, glass, etc., but is not limited thereto.

7 illustrates an optical path in the vicinity of a connection portion of a multi-panel display device when an optical member according to an embodiment of the present invention is used.

As shown in FIG. 7 , when the observer 250 ′ is on the side having a viewing angle equal to or greater than a certain level, the emitted lights L1 , L2 , and L3 are directed in the viewing direction toward the connection part 300 .

Looking at the outermost emitted light L1 among them, light from P1, which is the outermost pixel of the display area of the individual display device 410 , is reflected on the inclined reflective surface 520 of the optical member 500 , and then is refracted. It is refracted by the lens unit 530 and enters the viewer's field of view. Therefore, when there is no optical member 500, the right end of the connection part 300 will be exposed, but the image of the pixel adjacent to the connection part 300 is displayed by the optical member 500 according to the present embodiment. The image discontinuity caused by the connection part 300 may be improved.

Similarly, the light from the pixel P2 of the display area is reflected by the inclined reflective surface 520 , is refracted by the refractive lens unit 530 , and is incident to the user's gaze as the output light L2 . Accordingly, the connection part 300 is not recognized by the user.

On the other hand, in the emitted light L3, the light from the outermost pixel P1 is directly incident on the refractive lens unit 530 without passing through the inclined reflection surface, is refracted and proceeds to the user's gaze.

Therefore, even when the multi-panel display device is viewed from the viewing angle β as shown in FIG. 7 , the connection part 300 is not recognized, and the image of the pixel in the adjacent display area is reflected, refracted/enlarged, and thus the connection part of the multi-panel display device is viewed. The image discontinuity problem at 300 can be improved.

8 is a view for explaining the position and size of the inclined reflection surface of the optical member according to an embodiment of the present invention is formed.

As shown in FIG. 8 , the inclined reflective surface 520 of the optical member 500 according to the present embodiment may completely cover the non-display area 414 of the individual display device 410 from the front. _{The projected width D R} of the 520 projected on the display panel unit is preferably equal to or greater than _{the width D NA} of the non-display area of the individual display device.

That is, the outermost point (X0 in FIG. 8) of the inclined reflective surface 520 coincides with the outermost point (X0') of the corresponding individual display device, and the innermost point (X0' in FIG. 8 ) of the inclined reflective surface 520 . The display panel projection position of X1 of the display device 410 may be disposed more inward than the inner boundary point X1 ′ of the non-display area 414 of the individual display device 410 .

On the other hand, since it has an optical path as shown in FIG. 7 , the width D _L of the refractive lens unit 530 is preferably larger than _{the projected width D R} of the inclined reflective surface 520 .

That is, as shown in FIG. 7 , the refractive lens unit 520 does not refract only the light reflected from the inclined reflective surface 520 according to the viewing direction, but directly refracts the light from the pixels in the display area. _{The width D L} of the refractive lens unit 530 is formed to be larger than _{the projected width D R} of the inclined reflective surface 520 .

9 shows the relationship according to the inclination angle θ of the inclined reflective surface, the thickness T of the optical member, and the relative size of the non-display area 414 of the individual display device, and FIG. 10 is the inclination angle θ of the inclined reflective surface. ) and the thickness (T) of the optical member are shown in the case of different optical paths.

As described above, the condition expressed in Equation 1 must be satisfied in which the projected width of the inclined reflective surface 520 of the optical member 500 must be larger than the non-display area 414 of the individual display device 410 .

In this case, when the width of the non-display area of the individual display device is fixed, the first inclination angle θ of the inclined reflection surface and the thickness T of the optical member have a relationship in inverse proportion to each other. _{That is, when the thickness T of the optical member decreases in order to form the projection width D R} of the same inclined reflective surface 520, the first inclination angle θ of the inclined reflective surface must be increased, and when the thickness T of the optical member increases, the inclined reflective surface The first inclination angle θ of becomes small.

The left diagram of FIG. 9 is a case where the thickness T of the optical member is large and the first inclination angle θ of the inclined reflection surface is small, and the right diagram of FIG. 1 This is a case where the inclination angle θ is large.

Comparing the optical paths in both embodiments, as shown in FIG. 10, when the thickness T1 of the optical member is large and the first inclination angle of the inclined reflective surface is small as θ1, the light emitted at a specific viewing angle is connected to the connection part 300 is the image of pixel P2 relatively adjacent to . Therefore, there is an advantage in that the continuity of the image in the vicinity of the connection portion 300 is excellent. However, in this case, the thickness of the optical member 500 must be increased, and thus the weight or cost of the optical member is increased, and overall transmittance is deteriorated.

Conversely, as shown in the right side of FIG. 9 , when the thickness T2 of the optical member decreases, the first inclination angle of the inclined reflection surface 520 should be increased to θ2. In this case, as shown on the right side of FIG. 10 , an image of a pixel Pk far away from the connection part on the optical path is output when viewed from an observer at the same viewing angle as in the above case. Accordingly, image continuity in the connection portion may be deteriorated. Accordingly, it is preferable that the first inclination angle of the inclined reflection surface of the optical member according to the present embodiment is at least 80 degrees or less.

Considering such a characteristic, under the condition that the thickness T of the optical member may be a certain or more, it is preferable that the first inclination angle θ of the inclined reflection surface is smaller. In particular, in the case of a recently developed individual display device, the bezel may be very small. In this case, the first inclination angle of the inclined reflective surface may be minimized without increasing the thickness T of the optical member.

In this way, the first inclination angle θ of the inclined reflection surface of the optical member may be determined by parameters such as the width of the bezel of the individual display device, the allowable thickness T of the optical member, and the degree of image continuity in the connection portion, and the like in the connection portion. In order to improve image continuity, a smaller first inclination angle θ of the inclined reflective surface may be desirable.

Meanwhile, in the case of the multi-panel display device according to the present embodiment, as described above, a method of reflecting light from adjacent pixels in the connection portion 300 to which the individual display devices are connected and refracting the light again is used.

In this case, the refractive lens unit 530 functions to not only refract light but also enlarge the light. Therefore, compared to an image in a region other than the connection part 300 of the multi-panel display device, for example, in the display region of each individual display device, the image near the connection part 300 may have lower luminance or sharpness. There is this.

Accordingly, in another embodiment of the present invention, in order to overcome this problem, in configuring the pixel structure of the display panel included in the individual display device, the high-resolution region 450 near the connection portion 300 and the low-resolution region in the central region (440) to be distinguished.

11 is a display panel of an individual display device according to an embodiment of the present invention, showing a configuration including a high-resolution area at the edge and a low-resolution area at the center.

In the embodiment of FIG. 11 , the display panel of each individual display device 410 constituting the multi-panel display device includes a high-resolution area 450 disposed at the edge and a low-resolution area 440 disposed at the center area. is composed

The high-resolution region 450 and the low-resolution region 440 may be divided by the size of pixels disposed in each region. Taking a recent TV panel as an example, the low resolution region 440 may have a pixel size and arrangement capable of realizing full HD resolution, and the high resolution region 450 may have a pixel size and arrangement capable of realizing ultra HD resolution.

As shown in the enlarged section of Figure 11 also, a low-resolution area 440 has low-resolution pixel of common size; the (442 P _L) it is formed, and high-resolution areas 450, the low-resolution pixels; smaller than (442 P _L) A high-resolution pixel 452 (P _H ) having

At this time, in consideration of the arrangement of the gate line GL and the data line DL formed on the display panel of the individual display device 410 , the high-resolution pixel 452 ( P _H ) moves in the vertical direction (ie, the data line direction). the low-resolution pixels; only the size of the (442 P _L) and the size and the same, and the transverse direction (that is, the gate line direction) can be formed to be smaller than the low-resolution pixel. By using this structure, only the number of data lines can be increased while the number of gate lines is kept constant.

Of course, on the contrary, by making the horizontal size of the high-resolution pixel and the low-resolution pixel the same and only the vertical size of the high-resolution pixel being different, the number of data lines may be kept constant and only the number of gate lines may be increased. .

On the other hand, as shown in (b) of FIG. 11 , the high-resolution region 450 is formed at the edge of the display panel of the individual display device 410 , and starts from a predetermined region of the non-display region 414 of the individual display device. It may be formed up to a certain point of the display area.

At this time, the high-resolution area 450 may be represented by a width which is formed in the transverse (D _H) of the high resolution region, is the width (D _H) of such a high-resolution area is preferably larger than the width of the refractive lens portion (D _L) .

As shown in FIG. 7 , by the oblique reflective surface 520 and the refractive lens unit 530 of the optical member 500 , even the light from the pixel disposed in the considerably inner portion of the display area is reflected and refractioned in the optical path. can be emitted outside. In particular, the position of the pixel emitted to the outside through the optical member according to the present embodiment may be changed according to the first inclination angle of the inclined reflective surface and the viewing angle of the user's gaze. Also, pixels inside the pixel area may be recognized as the image of the connection part 300 .

Accordingly, it is preferable that the width D _H of the high-resolution region is greater than the width D _L of the refractive lens unit, or at least the high-resolution pixel is formed further to the inside of the panel than the region of the refractive lens unit 530 .

In this case, pixels are formed only in an inner portion of the non-display area 414 of the individual display device 410 and no pixels are formed in the remaining portion. Accordingly, the region in which the high-resolution pixel P _H is formed may be defined from a predetermined portion of the non-display area 414 to a predetermined point Q ₂ of the display area of the display panel, and such a high-resolution pixel P _H formation area At least the inner boundary Q ₂ of the refractive lens unit 530 is preferably disposed inside the panel rather than _{the inner boundary point Q 1 of the region.}

In this way, by arranging the high-resolution region at the edge of the display panel of the individual display device, the resolution and image quality of the image in the vicinity of the connection portion 300 of the multi-panel display device can be maintained uniformly with the images in other regions.

12 is a projected width of the inclined reflecting surface (D _R), the individual display device the width of the non-display region (D _NA), width of the refractive lens (D _L) and a width of the high-resolution area of a display panel (D _H) and the size of the show the relationship

As previously described individually, the size of the formation of the inclined reflective surface 520 and the refractive lens unit 530 of the optical member 500 used in the embodiment of the present invention, and the high-resolution region 450 of the display panel. The formation sizes have a certain relationship with each other, and FIG. 12 will describe them collectively.

That is, as shown in FIG. 12 , the projected width D _R of the inclined reflective surface 520 formed on the optical member 500 must block the non-display area 414 of the individual display device located thereunder. _{Preferably, it is larger than the width (D NA} ) of the non-display area of the display device, and since the refractive lens unit 530 of the optical member 500 refracts the light reflected from the oblique reflective surface and the light from the pixels of the display area, the refractive lens The negative width D _L is preferably larger than _{the projected width D R} of the inclined reflective surface 520 .

Also, as described above, the pixel that can be recognized as the image of the connection part 300 by the optical member 500 according to the present embodiment may be a pixel disposed inside the display area. _{Accordingly, the width D H} of the high-resolution region of the display panel _{is greater than the width D L} of the refractive lens unit _{, or the inner boundary Q 2} of the high-resolution pixel P _H forming region is at least the inner side of the refractive lens unit 530 region. It is preferable to be located inside the panel rather than the boundary point Q _{1 .}

According to the embodiments of the present invention as described above, in the multi-panel display device configured by connecting a plurality of individual display devices, the optical member including the inclined reflective surface and the refractive lens unit is disposed on the multi-panel display device by Even at a large horizontal viewing angle, there is an effect of securing image continuity at the panel connection part.

In addition, by arranging a high-resolution area on the edge of the display panel of an individual display device to compensate for the resolution and image quality of the image near the connection part of the multi-panel display device, the resolution or quality of the entire image displayed on the multi-panel display device is improved. It has the effect of keeping it uniform.

The above description and the accompanying drawings are merely illustrative of the technical spirit of the present invention, and those of ordinary skill in the art to which the present invention pertains can combine configurations within a range that does not depart from the essential characteristics of the present invention. , various modifications and variations such as separation, substitution and alteration will be possible. Accordingly, 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. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

400: display panel unit 410: individual display device
300: connection part 500: optical member
520: inclined reflective surface 530: refractive lens unit
440: low-resolution region 450: high-resolution region

Claims (13)

a display panel unit to which a plurality of individual display devices are connected, the display panel unit including a connection part to which non-display areas of the individual display devices are connected;
an optical member disposed on the display panel part, the optical member covering an upper part of the connection part and including a slanted reflective surface inclined to have a vertical direction and a first inclination angle of the display device on a side surface, the optical member including a refractive lens part on the upper part;
including,
_{The reflective surface projection width D R} , which is the size of the inclined reflective surface projected on the display panel unit, _{is greater than the width D NA} of the non-display area of the individual display device, and is greater than the width D _{L of the refractive lens unit.} small,
At least a portion of the refractive lens unit is located outside a region on the connection unit. According to claim 1,
The optical member is configured by connecting a plurality of unit optical members, and the unit optical member is provided on a base plate, the refractive lens unit disposed on a partial region of the upper portion of the base plate, and a side inclined cut surface of the base plate A multi-panel display device including the inclined reflective surface. According to claim 1,
The inclined reflective surface of the optical member covers at least an upper part of the connection part. delete According to claim 1,
The display panel of the individual display device includes a high-resolution area disposed at an edge and a low-resolution area disposed at a center area. 6. The method of claim 5,
The high-resolution region includes a plurality of high-resolution pixels ( _PH ), and the low-resolution region includes a plurality of low-resolution pixels ( _PL ) having a size larger than that of the high-resolution pixel. 6. The method of claim 5,
A multi-panel display device having _{a width (D H} ) of a high-resolution region disposed on a display panel of the individual display device greater than a width (D _{L ) of the refractive lens unit.} 6. The method of claim 5,
_{The inner boundary Q 2} of the high-resolution region is located inside the panel rather than the inner boundary point Q _{1 of the refractive lens unit.} 3. The method of claim 2,
A first inclination angle of the inclined reflective surface is 80 degrees or less. 3. The method of claim 2,
The refractive lens unit is a linear Fresnel lens or a convex lens for a multi-panel display. 3. The method of claim 2,
The base plate and the refractive lens unit included in the unit optical member include poly-methyl methacrylate (PMMA), polycarbonate (PC), poly ether sulfone (PES), and methacryl. A multi-panel display device made of at least one light-transmitting material selected from Methacrylate Styrene (MS) and glass. 3. The method of claim 2,
A multi-panel display device in which a silver (Ag) or aluminum (Al) reflective layer is coated on the inclined reflective surface. According to claim 1,
The refractive lens unit is a linear Fresnel lens,
The Fresnel lens includes a plurality of ridges extending in a vertical direction of the individual display device,
A highest ridge among the plurality of ridges is present in the middle of the connection portion, and the plurality of ridges are lowered toward a central region of the individual display device,
The lowest ridge among the plurality of ridges is positioned outside the outermost portion of the connection portion of the display panel and the inclined reflective surface of the optical member.

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