KR20060072737A - Large size display device of tiled method - Google Patents

Abstract

The present invention relates to a tiled display device in which a borderline display is prevented from appearing in a boundary area between display panels, thereby enabling seamless display, and comprising a plurality of display panels defining a plurality of pixels to define an image display unit. And a plurality of scattering lenses having a predetermined curvature in the upper layer of the display panel, and a plurality of scattering lenses having a plurality of panel seating parts to allow the plurality of display panels to be seated. A large area display device of a tiled type is disposed and includes a light diffusion plate that collectively enlarges and reproduces an image formed on an image display unit of display panels.

Description

LARGE SIZE DISPLAY DEVICE OF TILED METHOD

1 is a block diagram showing a conventional tiled liquid crystal display device.

2 is a block diagram showing a large-area display device of the tiled method according to the present invention.

3 is a configuration diagram showing a liquid crystal panel.

4A and 4B show the light diffusing plate according to the present invention in detail, FIG. 4A is a plan view, and FIG. 4B is a sectional view taken along line II ′ of FIG. 4A.

*** Explanation of symbols for main parts of drawing ***

120: frame 130; Display panel

140: light diffusion plate 143: scattering lens

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large area display device, and more particularly, to a tiled type large area display device capable of continuously reproducing an image by preventing the boundary display from appearing in the boundary area between display panels.

In general, the electronic display device is increasing the size of the industry in the realization of the information society while increasing the importance as a means of transmitting the etching information. The diversification of information represented by the word multimedia makes the necessity of an electronic display device more clear. At the same time, the demand for an electronic display device is also increasing in large screen, high image quality, excellent visibility, and economic efficiency. In particular, low voltage and low power consumption are required for portable information devices.

As one of such electronic display devices, the liquid crystal display device (LIQUID CRYSTAL DISPLAY DEVICE), which has been expanding its application market with features such as thinness, light weight, and low power consumption, is rapidly expanding its acceptance by color display. As the quality of the product is improved, a larger size of high-definition products is required, and accordingly, equipment adoption for establishing the aspect technology of the large-screen color liquid crystal is in earnest.

The large-screen color liquid crystal display device has a limitation in taking the screen size due to its characteristics, and the maximum panel size known so far is known to be 55 inches.

Accordingly, so-called projection TVs have emerged, in which an optical system is attached to a small panel so that a large image is formed on the screen. Even with this development trend, there is a limit to bringing the actual screen size of the liquid crystal display device large. Currently, a tiled liquid crystal display device in which multiple sheets of liquid crystal panels are laminated to form a large display device. crystal display devices) have been put to practical use.

1 is a block diagram showing a tiled liquid crystal display device.

As shown in the figure, the tiled liquid crystal display device 10 is provided with a plurality of liquid crystal panels 30a to 30d fixed to the frame 20. In this case, each of the liquid crystal panels 30a to 30d has a backlight assembly, a liquid crystal plate, a liquid crystal layer, and polarizing members attached thereto to form one unit. The frame 20 includes an outer wall frame 20a forming an outer wall, a partition frame 20b interposed between the panel and the panel, and a bottom plate 20c on which the panels 30a to 30d may be seated. In this case, each of the liquid crystal panels 30a to 30d is seated in a space partitioned by the partition wall frame 20b and the outer wall frame 20a and bonded to each other.

In the large screen configuration method using the tiling technique as described above, since an image is not formed in the barrier rib frame 20b, a seam phenomenon that is displayed as a boundary line in an area corresponding to the barrier rib frame 20b is formed during screen formation. There is a problem that can not form a unified image as a whole.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a tiled large area display device capable of preventing a seam phenomenon on an upper portion of a liquid crystal panel.

According to an aspect of the present invention, a plurality of display panels defining a plurality of pixels to define an image display unit, a frame including a plurality of panel mounting units, and a top layer of the display panel may be mounted on the display panel. It comprises a plurality of scattering lens having a predetermined curvature, and one scattering lens is disposed so as to correspond to at least three or more pixels, and includes a light diffusion plate to collectively enlarge and reproduce the image formed on the image display portion of the display panel The large-area display device of the tiled type structure is provided.

The pixel may be composed of at least three subpixels, for example, R, G, B, or R, G, B, W, or the like.

In addition, the scattering lens has a hemispherical shape, the light diffusion plate may be formed of glass or transparent plastic. Each scattering lens may be disposed to correspond to ten or more pixels.

The display panel may be a liquid crystal panel, wherein the liquid crystal panel includes first and second substrates, gate lines and data lines arranged on the first substrate to define respective subpixels, and respective subpixels. A pixel electrode formed in an area, a switching element arranged at an intersection of the gate line and the data line to switch each subpixel, a color filter formed on the first substrate, a common electrode formed on the color filter, and the And a liquid crystal layer formed on the first and second substrates.

The frame may include an outer wall frame and a partition frame for dividing an inner region formed by the outer wall frame into individual panel seating regions on which the plurality of display panels are mounted.

The present invention configured as described above further comprises a light diffusing plate in which a plurality of scattering lenses are disposed on the upper surface of the display panel, thereby eliminating deep phenomena (border lines) appearing between the panels to display a uniform image as a whole. .

That is, since the image is not displayed in the boundary area between the panels in the related art, when the screen is formed, a seam phenomenon occurs in which a region corresponding to the boundary area of the panels is displayed as a boundary line, so that an image which is not uniform as a whole is displayed. There was a problem. On the other hand, the present invention can implement a seamless by constructing a light diffusion plate that collectively enlarges and reproduces an image formed on the image display unit of the display panels, so that the image is also displayed in the boundary region between the panels.

In this case, the light diffusing plate is a plurality of scattering lenses are arranged, each scattering lens is configured to correspond to at least several tens of pixels. Accordingly, a plurality of scattering lenses is disposed over the entire upper surface of the display panel, and an image formed on the image display unit of the display panel is enlarged and displayed by the plurality of scattering lenses.

Hereinafter, the tiled display device according to the present invention will be described in more detail with reference to the accompanying drawings.

2 is an exploded perspective view schematically illustrating a tiled display device according to an exemplary embodiment of the present invention, and FIG. 3 illustrates the display panel (liquid crystal panel) in detail.

First, as shown in FIG. 2, the tiled display device 100 includes a plurality of display panels 130a to 130d and a light diffusion plate 140 formed on the display panels 130a to 130d. It is fixed to the 120 is installed. In this case, the display panels 130a to 130d may include a liquid crystal display panel (LCD), a field emission display panel (FED), a plasma display panel (PDP), and an electroluminescence panel. A sense display panel (EL) or the like may be used.

In particular, as shown in FIG. 3, when the display panels 130a to 130d are liquid crystal panels, each of the display panels 130 may include a first substrate 131 and a second substrate 135 and the first and the first substrates. The liquid crystal layer 138 is formed between the two substrates 131 and 135. The first substrate 131 is a thin film transistor array substrate, and a gate line 133 and a data line 132 are formed, and a plurality of pixel regions are defined by the gate line 133 and the data line 132. do. A switching element (not shown) for switching each pixel is formed in an area where each gate line 133 and the data line 132 cross each other, and a pixel electrode 134 for driving a liquid crystal in the pixel area. ) Is formed.

On the other hand, the second substrate 135 is a color filter substrate, the color filter layer 136 for real color and the black matrix 139 for preventing light leakage between the pixels are formed. In this case, the color filter layer 136 is formed such that color filters of R, G, and B colors are disposed in areas corresponding to the pixel areas. The common electrode 137 for driving the liquid crystal is formed on the color filter layer 136 together with the pixel electrode 134.

In this case, although not shown in the drawing, the common electrode 137 may be formed on the same plane as the pixel electrode 134 (eg, the first substrate). As described above, when the common electrode 137 and the pixel electrode 134 are formed on the same substrate, the viewing angle may be improved by horizontal driving of the liquid crystal.

2, the tiled display device of the present invention will be described with reference to FIG. 2. The frame 120 includes an outer wall frame 120a forming an outer wall, a partition frame 120b interposed between the panel and the panel, and a panel. Field 130a to 130d and the light diffusion plate 140 may be formed of a base plate 120c on which it can be seated. In this case, each of the display panels 130a to 130d is seated and bonded to a space partitioned by the partition wall frame 120b and the outer wall frame 120a.

In addition, since the light diffusion plate 140 is mounted on the display panels 130a to 130d and the partition frame 120b, the height of the outer wall frame 120a is higher than that of the partition frame 120b.

The light diffusion plate 140 includes a plurality of scattering lenses 143 arranged on the transparent film 141, and the scattering lenses 143 may diffuse light transmitted through pixels of the display panel 130. So that it has a certain curvature on its surface. Each scattering lens 143 is disposed to correspond to a pixel of the display panel 130, and corresponds to at least three pixels, and in particular, may correspond to dozens of pixels. The pixel may include at least three subpixels, for example, the pixel may include R, G, and B subpixels, or R, G, B, and W subpixels.

On the other hand, the scattering lens may be manufactured to correspond to each pixel, but in this case, there is a problem of accurately aligning the scattering lens with each pixel, and a problem of deterioration of image quality due to moiré appearing on the screen. That is, since the scattering lens enlarges each pixel individually, the light transmitted through the pixels of the display panel is scattered by the scattering lens, and overlaps in the boundary area between the pixels, thereby causing spots on the screen. Therefore, in the present invention, the scattering lens may be arranged to correspond to at least three pixels, thereby minimizing moiré phenomenon.

In addition, the scattering lens 143 of the present invention is disposed such that each is spaced apart in at least one sub-pixel. That is, the distance between the scattering lens 143 should be smaller than the width of the sub-pixel.

The curvature of the scattering lens may be configured differently toward the outer side of the display panel in order to minimize the boundary line observed in the boundary region between the display panels, that is, the region where the partition frame is formed.

4A and 4B show the light diffusion plate according to the present invention in detail. FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view taken along line II ′ of FIG. 4A.

As shown in the figure, the light diffusion plate 140 of the present invention is composed of a transparent film 141 and a plurality of scattering lenses (143, 143 ') having a predetermined curvature thereon. The transparent film 141 and the scattering lens (143,143 ') is made of glass or transparent plastic, it can be produced through a mold. In this case, the size of each scattering lens (143, 143 ') is designed to correspond to at least three or more pixels, in particular, may be designed to correspond to dozens of pixels.

In addition, the scattering lenses 143 and 143 'have the same shape as the pixel and may have, for example, a rectangular shape. And it has the same curvature with respect to front, back, left, and right sides.

Each of the scattering lenses 143 and 143 'is spaced apart from each other at a predetermined distance d1, and the size of the d1 does not exceed the width of the single subpixel.

On the other hand, the scattering lenses 143 ′ disposed in the boundary area between the display panels, that is, the area adjacent to the partition frame, are spaced apart by d2, and d2 has a larger value than d1. This is because the width of the partition frame is larger than the width of the sub-pixels.

As such, the scattering lenses 143 ′ disposed in an area adjacent to the partition wall frame have a large distance, and thus have a relatively large curvature compared to other scattering lenses 143 (that is, scattering lenses not adjacent to the partition wall frame). It must be designed to have. In particular, the curvature of the outer surface in the direction in which the partition frame is located should be increased, and the opposite side of the outer wall should have the same curvature as the other scattering lenses 143.

In general, the larger the curvature of the lens is, the larger the scattering degree of light becomes, and thus the larger the image is enlarged. Therefore, in order to view an image in a region corresponding to the partition wall frame (non-pixel region where the display panel does not display an image) by the user, the image must be enlarged up to this region, and thus, the scattering lens 143 facing the partition frame. The curvature of ') should be designed to be relatively large compared to the scattering lens 143 disposed in another region.

In this case, the curvature of the scattering lens 143 ′ may be designed to be the same as other scattering lenses 143, but the curvature may be designed differently in order to more effectively reduce the seam that appears in the boundary area between the display panels. . That is, since the degree of light scattering increases due to the large curvature of the scattering lens surface, the pixel displayed through the display panel may be enlarged to a greater extent, thereby displaying an image up to the partition frame region.

However, an image of a pixel located at an outer side of the display panel adjacent to the partition frame is enlarged larger than an image at the center thereof, so that the actual user observes the screen outside the panel even larger. Therefore, in order to solve this problem, a scattering lens having a relatively large curvature and a pixel corresponding to the scattering lens should be designed relatively smaller than the pixel at the center of the display panel.

The curvature of the scattering lens may be gradually increased toward the outside of the display panel. That is, by designing all the pixels of the display panel in the same manner as before and gradually increasing the curvature of the scattering lens toward the outside of the display panel, the observer can prevent the image from being felt in the partition frame region.

As such, when the curvature of the scattering lens is gradually increased, it is possible to reduce the trouble of redesigning the pixels of the display panel.

As described above, the present invention relates to a large-area display device of a tiled method that can prevent a deep phenomenon appearing on the boundary surface of a conventional display panel, and includes a light diffusion plate that collectively enlarges and reproduces an image formed on the display panel. By further configuring, it is possible to reproduce images continuously. That is, since the image is displayed through the light diffusion plate in the boundary region (region corresponding to the partition frame) of the display panel, the boundary line that appears in the boundary region of the display panel can be minimized.

In the present invention, the light diffusing plate is composed of a plurality of scattering lenses having a predetermined curvature, the size of the scattering lens has a size corresponding to at least three or more pixels to prevent moiré phenomenon.

In addition, in the present invention, the curvature of the scattering lens adjacent to the partition frame may be larger than the curvature of the scattering lens disposed at the center of another pixel, thereby minimizing the boundary line observed in the boundary area between the display panels. In this case, the scattering lens adjacent to the boundary region of the display panel has a left-right asymmetric structure because the curvature of the outer side of the panel is designed to be larger than the curvature of the opposite side. In this case, a pixel in which an image is reproduced through an area having a large curvature of the scattering lens should be designed smaller than other pixels.

In addition, in order to reduce the trouble of redesigning the size of the pixel, the curvature of the side surface on which the partition frame is formed may be gradually increased toward the outside of the display panel.

As described above, the basic concept of the present invention is to use a plurality of scattering lenses having a predetermined curvature as a light diffusion plate so that an image is displayed in the non-pixel region between the panel and the panel. That is, by further configuring the light diffusing plate of the present invention in a foldable display element in which the panel and the panel are folded, an image can be displayed in a non-pixel region (folding region).

As described above, according to the present invention, an additional light diffusing plate for collectively enlarging and reproducing an image formed on the image display unit of the display panels is further configured in the tiled display device, so that images can be continuously reproduced. Accordingly, a high quality large area display device can be provided.

Claims (15)

A plurality of display panels in which a plurality of pixels are formed to define an image display unit; A frame provided with a plurality of panel seating parts to allow the plurality of display panels to be seated thereon; And A plurality of scattering lenses having a predetermined curvature in the upper layer of the display panel, one scattering lens is disposed so as to correspond to at least three or more pixels, to collectively enlarge and reproduce the image formed on the image display portion of the display panel A tiled large area display device including a diffusion plate. The tiled display device of claim 1, wherein the pixel comprises at least three subpixels. The large-area tiled display device of claim 1, wherein the scattering lens is disposed to correspond to ten or more pixels. The large-area display device according to claim 1, wherein the light diffusion plate is glass. The large-area display device of claim 1, wherein the light diffusion plate is a transparent plastic. The tiled display device of claim 1, wherein the curvature of one side of the scattering lens disposed at the boundary between the display panels is larger than the curvature of the scattering lens disposed at the center of the display panel. The tiled display device of claim 6, wherein the scattering lens has an asymmetrical structure. The tiled display device of claim 6, wherein the pixel corresponding to the scattering lens is designed to be smaller than the size of the pixel disposed at the center of the panel. The tiled display device of claim 1, wherein a curvature of one side of the scattering lens is gradually increased toward the outside of the display panels. The tiled display device of claim 9, wherein the pixels of the display panel are all designed to have the same size. The tiled display device of claim 1, wherein a spacing between the scattering lenses is smaller than a width of a subpixel. The large-area tiled display device according to claim 1, wherein the display panel is a liquid crystal panel. The method of claim 12, wherein the liquid crystal panel, First and second substrates; Gate lines and data lines arranged on the first substrate to define respective sub-pixels; A pixel electrode formed in each subpixel region; A switching element disposed at an intersection of the gate line and the data line to switch each subpixel; A color filter formed on the first substrate; A common electrode formed on the color filter; And And a liquid crystal layer formed on the first and second substrates. The method of claim 1, wherein the frame, Outer wall frame; And And a partition frame for dividing an inner region formed by the outer wall frame into individual panel seating regions on which the plurality of display panels are mounted. 15. The tiled display of claim 14, wherein the outer wall frame is formed higher than the partition frame.

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