KR101996970B1 - Tiled display device - Google Patents

Abstract

In the tile-type display device of the present invention, when a plurality of display panel modules are joined to form a large display screen, a retroreflector is provided at a junction between the display panel modules, An upper polarizer provided on an upper portion of the display panel module; And a retroreflector provided between the upper polarizer and the display panel module for retroreflecting the external light, the non-display boundary region being disposed between the display panel modules.

Description

[0001] TILED DISPLAY DEVICE [0002]

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tile-type display device, and more particularly, to a tile-type display device that realizes a large display screen.

In general, electronic display devices are increasing the importance of visual information as well as increasing the size of industry in the realization of information society. The diversification of information represented by the word multimedia has further clarified the necessity of electronic display devices. At the same time, the demand for an electronic display device is becoming strong on the large screen, high image quality, excellent visibility and economy. Particularly, in portable information devices, low voltage and low power consumption are required as essential conditions.

Liquid crystal displays (LCDs), which are one of these electronic display devices and have expanded their application market by being thinned, light in weight, and low in power consumption, are rapidly expanding in demand. Recently, An increasingly large-sized high-quality product is required.

However, in order to manufacture a large-screen liquid crystal display device, a display manufacturing process must be applied to a large-sized glass. In the early stage, a so-called projection TV, in which a large image is formed on a screen by mounting an optical system on a small liquid crystal display panel, has appeared.

However, in order to realize a large display screen, a plurality of liquid crystal display panel modules are arranged in a tile-like liquid crystal display Device (tiled LCD) is being put to practical use.

For example, the tile-type liquid crystal display device is manufactured by joining two or more liquid crystal display panel modules as disclosed in U.S. Patent Nos. 4,980,775, 5,067,021, 5,068,740, and 5,079,636. In this case, A seamless technique for a boundary portion between liquid crystal display panel modules is required.

1 is a plan view showing an example of a general tile type display device, and shows a 2x2 tile type display device as an example.

As shown in the figure, the tile-type display device 10 includes a plurality of display panel modules 30a, 30b, 30c, and 30d fixed to the frame 35. As shown in FIG.

Although not shown, each of the display panel modules 30a, 30b, 30c, and 30d is attached with a backlight assembly, a display panel, an optical member, or the like to form one unit body.

A non-display area exists on the outside of each of the display panel modules 30a, 30b, 30c, and 30d structured in this way. By joining these non-display areas, the tiled liquid crystal display device 10 displays a non- Region 60 is present.

The non-display border area 60 has a black state when the display is driven, thereby giving a sense of image disconnection when viewing the display.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a tile type display device which improves a driving image disconnection feeling with respect to a junction between display panel modules when a large display screen is realized by bonding a plurality of display panel modules The purpose is to provide.

Other objects and features of the present invention will be described in the following description of the invention and the claims.

According to another aspect of the present invention, there is provided a tile-shaped display device including a plurality of display panel modules joined together to form a large display screen, the tile-shaped display device comprising: an upper polarizer plate provided on the display panel module; And a retroreflector provided between the upper polarizer and the display panel module for retroreflecting the external light, the non-display boundary region being disposed between the display panel modules.

Here, the display panel module may include a liquid crystal display panel or an organic light emitting display.

And a lower polarizer disposed under the display panel module.

And a backlight assembly provided below the lower polarizer plate.

In this case, a light shielding member may be further provided between the lower polarizer and the backlight assembly.

And the retroreflector has a cross shape or a lattice shape according to the shape of the non-display boundary region between the display panel modules.

The retroreflector is characterized by having a frame shape including a cross shape or a lattice.

The light shielding member has a cross shape or a lattice shape.

The light shielding member has a frame shape including a cross shape or a grating.

The retroreflector comprises a plurality of micro glass spheres formed on one surface of the aluminum deposition layer; A combination layer for supporting a plurality of the minute glassy spheres so as to be continuously arranged on the same plane on equal intervals; And an adhesive layer formed on a lower portion of the coupling layer so as to be easily attached to the display panel module.

As described above, in the tile-type display device according to the present invention, when a plurality of display panel modules are bonded to realize a large display screen, a retroreflector is provided at a junction between the display panel modules, It is possible to improve the disconnection of the driving image through the reflection of the driving image.

That is, a retroreflector is provided below the non-display boundary region to reflect an external light source, thereby making it impossible to visually distinguish the core region (artificial boundary, physical seam), thereby minimizing the visibility of black in the core region.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a typical tile-shaped display device as an example. Fig.
FIG. 2 is an exploded perspective view schematically showing a tile-shaped display device according to a first embodiment of the present invention; FIG.
3 is a cross-sectional view schematically showing a part of a tile-shaped display device according to a first embodiment of the present invention.
4 is an exploded perspective view showing a liquid crystal display panel as an example.
5 is an exploded perspective view schematically showing a tile-shaped display device according to a second embodiment of the present invention.
6 is a cross-sectional view schematically showing a part of a tile-shaped display device according to a second embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a tile type display device according to the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

2 is an exploded perspective view schematically showing a tile-shaped display device according to a first embodiment of the present invention, and shows a 2x2 tile-shaped display device as an example.

However, the present invention is not limited thereto, and the present invention is applicable to all n x m (n, m? 2) tile type display devices irrespective of the number of display panel modules to be bonded.

FIG. 3 is a cross-sectional view schematically showing a part of a tile-type display device according to a first embodiment of the present invention, for example, showing a cross-section of a junction between neighboring display panel modules.

4 is an exploded perspective view illustrating the liquid crystal display panel as an example of the display panel module.

Referring to the drawings, a tile-type display device 100 according to a first embodiment of the present invention includes a plurality of display panel modules 130a, 130b, 130c, and 130d fixed to a support frame (not shown).

A liquid crystal display panel, a field emission display panel, a plasma display panel, an organic light emitting display, or the like may be used for the display panel modules 130a, 130b, 130c, and 130d.

For example, when the display panel modules 130a, 130b, 130c, and 130d are liquid crystal display panels, the liquid crystal display panels may include a color filter substrate 105 and an array substrate 110 And a liquid crystal layer 126 formed in the cell gap between the color filter substrate 105 and the array substrate 110.

The color filter substrate 105 includes a color filter C composed of a plurality of sub-color filters 107 implementing colors of red, green and blue, And a transparent common electrode 108 for applying a voltage to the liquid crystal layer 126. The liquid crystal layer 126 is formed of a transparent matrix material.

The array substrate 110 includes a plurality of gate lines 116 and data lines 117 arranged vertically and horizontally to define a plurality of pixel regions P and a plurality of gate lines 116 and a plurality of data lines 117 crossing the intersections of the gate lines 116 and the data lines 117 A thin film transistor (TFT) T which is a switching element formed on the pixel region P and a pixel electrode 118 formed on the pixel region P. At this time, in the case of the transverse electric field type liquid crystal display device, the common electrode 108 is formed on the array substrate 110 instead of the color filter substrate 105.

For reference, reference numeral 120 denotes the above-described TFT array component formed on the array substrate 110.

A common electrode 108 and a pixel electrode 118 are formed on the liquid crystal display panel in which the color filter substrate 105 and the array substrate 110 are bonded to each other through the seal pattern 125, When the voltage of the data signal applied to the pixel electrode 118 is controlled while the voltage is applied to the common electrode 108, the liquid crystal of the liquid crystal layer 126 is applied to the common electrode 108 ) And the pixel electrode 118, the light is transmitted or blocked for each pixel to display a character or an image.

In order to control the voltage of the data signal applied to the pixel electrode 118 on a pixel-by-pixel basis, the thin film transistor T, which is a switching device, is separately provided in the pixels.

The upper and lower polarizers 101 and 111 are attached to the outer side of the liquid crystal display panel thus configured and the lower polarizer 110 polarizes the light transmitted through the backlight assembly 150 and the upper polarizer 103 ) Polarizes light passing through the liquid crystal display panel.

Although not shown in detail, the backlight assembly 150 will be described in detail. For example, a reflector is installed on a cover bottom, which is a support frame, and an LED array is disposed on at least one side of the reflector. And a light guide plate for emitting the light generated from the LED array toward the panel 101 may be installed in the outgoing direction of the LED array.

The light emitted from the LED array is incident on a side surface of the light guide plate having a transparent material. The reflection plate disposed on the back surface of the light guide plate reflects light transmitted to the back surface of the light guide plate toward the optical sheets on the upper surface of the light guide plate, And the uniformity is improved.

Here, the optical sheets according to the embodiments of the present invention include a diffusion sheet, an upper and a lower prism sheet, and a protective sheet may be added.

The diffusing sheet disperses the light incident from the light guide plate to prevent the light from being partially densely packed to prevent unevenness in the image displayed on the liquid crystal display panel and to refract the angle of the light incident from the light guide plate vertically.

The prism sheet reflects light passing through a specific angle or more of the light incident from the diffusion sheet to the light guide plate and concentrates the light incident on the light guide plate to a central portion so as to be distributed on the front surface of the liquid crystal display panel. do. These prism sheets can be two in order to gather light in up and down directions and in left and right directions.

The protective sheet protects the optical sheets sensitive to dust and scratches, prevents the optical sheets from flowing when the backlight assembly 150 is carried, diffuses light incident from the prism sheet, Can be more uniformly distributed.

The tile-type display device 100 according to the first embodiment of the present invention is configured to improve the image cut-off due to the seam of the junction between the display panel modules 130a, 130b, 130c, and 130d And a retroreflector 140 is provided on the junction.

As described above, a non-display area (normally covered with a black matrix 106) is formed on the outer periphery of each of the display panel modules 130a, 130b, 130c and 130d, and the size of this area determines the bezel width And the tile-type liquid-crystal display device 100 has a non-display boundary region in the tile due to the junction of the non-display regions.

The non-display border area has a black state when the display is driven, thereby giving a sense of image disconnection when viewing the display.

Accordingly, the present invention is characterized in that a retroreflector 140 is provided at the junction between the display panel modules 130a, 130b, 130c, and 130d to improve the sense of disconnection of the driving image through reflection of the external light source.

That is, when the display is driven, the reflection of the external light source by the retro-reflector 140 reduces the visibility of the viewer's eyes on the black of the heart. Accordingly, the viewer can relax the stimulus to the padding of the conventional tile-type display device 100, thereby improving the sense of image discontinuity when driving the display image, or feeling as if there is no shim.

The retroreflector 140 may have a cross shape or a lattice shape depending on the shape of the junction and may be disposed below the uppermost polarizer of the core region, that is, between the upper polarizer 101 and the display panel modules 130a, 130b, 130c, Lt; / RTI > However, the present invention is not limited thereto, and the retro-reflector 140 may have a frame shape including a cross shape or a lattice.

The retroreflector 140 may have a width corresponding to the width of the non-display boundary region.

The retro-reflector 140 may be made of a high-brightness material to utilize retro-reflection of light. For example, the retro-reflector 140 may include a plurality of micro-glass spheres formed on one surface thereof, and a plurality of micro- And an adhesive layer formed on the lower part of the coupling layer so that the coupling layer can be easily attached to the plate.

For example, the micro-glass sphere may be a glass sphere having a refractive index of 1.93 and a diameter of 30 to 100 탆. The micro-glass sphere may include an aluminum deposition layer at the distal end of the micro-glass sphere to retroreflect all the light incident on the focusing layer, May be formed to a thickness of 0.3 mu m to 0.4 mu m.

Meanwhile, in order to shield the lower backlight to the non-display boundary region, a light shielding member may be further provided between the upper portion of the backlight assembly, that is, between the lower polarizer and the backlight assembly. Will be described in detail.

5 is an exploded perspective view schematically showing a tile-type display device according to a second embodiment of the present invention, and shows a 2x2 tile-type display device as an example.

However, the present invention is not limited thereto, and the present invention is applicable regardless of the number of display panel modules to be bonded.

FIG. 6 is a cross-sectional view schematically showing a part of a tile-type display device according to a second embodiment of the present invention, for example, showing a cross-section of a junction between adjacent display panel modules.

5 and 6 illustrate a liquid crystal display panel as an example of a display panel module. However, the present invention is not limited thereto It is not.

Referring to the drawings, a tile-type display device 200 according to a second embodiment of the present invention includes a plurality of display panel modules 230a, 230b, 230c, and 230d fixed to a support frame (not shown).

At this time, a liquid crystal display panel, a field emission display panel, a plasma display panel, an organic light emitting display, or the like may be used for the display panel modules 230a, 230b, 230c, and 230d.

For example, when the display panel modules 230a, 230b, 230c, and 230d are liquid crystal display panels, the liquid crystal display panels may include a color filter substrate 205 and an array substrate 210 And a liquid crystal layer (not shown) formed in a cell gap between the color filter substrate 205 and the array substrate 210.

Although not shown in detail, the color filter substrate 205 separates a color filter composed of a plurality of sub-color filters implementing the colors of red, green, and blue and the sub-color filter and blocks light transmitted through the liquid crystal layer And a transparent common electrode for applying a voltage to the liquid crystal layer.

The array substrate 210 includes a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor that is a switching element formed in a crossing region between the gate lines and the data lines, Lt; / RTI > At this time, in the case of the transverse electric field type liquid crystal display device, a common electrode is formed on the array substrate instead of the color filter substrate.

Reference numerals 220 and 225 denote TFT array components formed on the array substrate 210 and an actual pattern for attaching the color filter substrate 205 and the array substrate 210, respectively.

The upper and lower polarizers 201 and 211 are attached to the outer side of the liquid crystal display panel and the lower polarizer 210 polarizes the light transmitted through the backlight assembly 250, And polarizes the light passing through the liquid crystal display panel.

The tile-shaped display device 200 according to the second embodiment of the present invention has the same structure as the display panel modules 230a, 230b, 230c, and 230d, The back reflector 240 is provided on the junction as in the first embodiment of the present invention.

The retroreflector 240 may have a cross shape or a lattice shape depending on the shape of the junction and may be disposed under the uppermost polarizer of the core region, that is, between the upper polarizer 201 and the display panel modules 230a, 230b, 230c, Lt; / RTI > However, the present invention is not limited thereto, and the retro-reflector 240 may have a frame shape including a cross shape or a lattice.

The retroreflector 240 may have a width corresponding to the width of the non-display boundary region.

As described above, the retroreflector 240 may be made of a high-brightness material in order to utilize reflex reflection of light. For example, the retroreflector 240 may include a plurality of micro glass spheres formed on one surface thereof and a plurality of micro glass spheres And an adhesive layer formed on the lower part of the coupling layer so that the coupling layer can be easily attached to the plate.

For example, the micro-glass sphere may be a glass sphere having a refractive index of 1.93 and a diameter of 30 to 100 탆. The micro-glass sphere may include an aluminum deposition layer at the distal end of the micro-glass sphere to retroreflect all the light incident on the focusing layer, May be formed to a thickness of 0.3 mu m to 0.4 mu m.

At this time, the tile-type display device 200 according to the second embodiment of the present invention has a structure in which the upper part of the backlight assembly 250, that is, the lower polarizer 211, And a light shielding member 245 is provided between the backlight assembly 250.

For example, the light shielding member 245 may be formed of a light shielding tape, and may have a cross shape or a lattice shape like the retroreflector 240. However, the present invention is not limited thereto, and the light shielding member 245 may have a frame shape including a cross shape or a grating.

The light shielding member 245 may have a width corresponding to the width of the non-display boundary region.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

100, 200: tile type display device 101, 201: upper polarizer plate
105,205: Color filter substrate 106,206: Black matrix
110, 210: array substrate 111, 211: lower polarizer plate
120, 220: TFT array components 125, 225:
130a, 230a, 130b, 230b, 130c, 230d, 130d, 230d:
140, 240: Retroreflector 245:

Claims (12)

A tile-shaped display device in which a plurality of display panel modules are joined to implement a large-sized display screen,
Wherein the display panel module includes N x M display panel modules, the N display panel modules are positioned in the horizontal direction, the M display panel modules are positioned in the vertical direction,
An upper polarizer provided on an upper portion of the display panel module; And
And a retroreflector provided between the upper polarizer and the display panel module and provided in the non-display boundary area including the non-display area of the display panel module and the area between the display panel modules to retroreflect external light, Tile type display device. The tile-type display device according to claim 1, wherein the display panel module comprises a liquid crystal display panel or an organic light emitting display. The tile-type display device according to claim 1, further comprising a lower polarizer plate provided below the display panel module. The tile-type display device according to claim 3, further comprising a backlight assembly provided below the lower polarizer plate. The tile-type display device according to claim 4, further comprising a light shielding member provided between the lower polarizer and the backlight assembly. The tile-type display device according to claim 1, wherein the retroreflector has a cross shape or a lattice shape according to the shape of a non-display boundary region between the display panel modules. The tile-type display device according to claim 1, wherein the retro-reflector has a frame shape including a cross shape or a lattice. The tile-type display device according to claim 5, wherein the light shielding member has a cross shape or a lattice shape. The tile-type display device according to claim 5, wherein the light shielding member has a frame shape including a cross shape or a lattice. 2. The backlight assembly of claim 1,
A plurality of micro glass spheres formed on one surface of the aluminum deposition layer;
A combination layer for supporting a plurality of the minute glassy spheres so as to be continuously arranged on the same plane on equal intervals; And
And an adhesive layer formed on a lower portion of the coupling layer so as to be easily attached to the display panel module. The method according to claim 1,
The display panel module includes:
An array substrate including a gate line and a data line crossing the gate line and defining a pixel region, the thin film transistor being formed in a crossing region between the gate line and the data line;
A color filter substrate including a black matrix formed between a color filter and a color filter;
Wherein the color filter substrate and the array substrate are bonded to each other.
12. The method of claim 11,
And a light shielding member formed at a lower portion of the array substrate.

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