KR20050068198A - Liquid crystal display device - Google Patents

Abstract

The present invention discloses a liquid crystal display device in which a liquid crystal panel of a liquid crystal display device can improve a light leakage defect caused by bending and pressing of the liquid crystal panel by disposing a buffer part in a panel guide and an upper case area corresponding to a pad subregion. . Disclosed is a liquid crystal display device comprising a liquid crystal panel, a panel guide, an optical sheet, a backlight assembly, a main frame and a lower cover, and an upper case, wherein the panel guide is formed to fix the liquid crystal panel. And a second buffer unit attached to the first buffer unit and the upper case.

Here, the material of the first buffer portion and the second buffer portion is a foamed resin EPI, EPP or synthetic resin, the second buffer attached to the edge of the first buffer portion and the panel guide attached to the inside of the upper case. A part fixes the liquid crystal panel at an upper portion and a lower portion, respectively, and the first buffer portion and the second buffer portion have a thickness of the liquid crystal panel.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device for improving light leakage by preventing the panel guide and the top case from being pressed and warped when the liquid crystal panel is assembled. .

Recently, due to the rapid development of technology in the semiconductor industry, liquid crystal display devices are being manufactured with smaller and lighter weight and more powerful products. Cathode ray tube (CRT), which is widely used in information display devices, has many advantages in terms of performance and price, but has many disadvantages in terms of miniaturization or portability.

On the other hand, liquid crystal displays have been attracting attention as an alternative means of overcoming the shortcomings of CRTs because they have advantages such as miniaturization, light weight, and low power consumption. Currently, almost all information processing devices that require display devices are required. The situation is attached to.

Such liquid crystal displays generally apply voltages to specific molecular arrays of liquid crystals to convert them into other molecular arrays, and change optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of liquid crystal cells that emit light by such molecular arrays. Is a display device using modulation of light by a liquid crystal cell by converting the light into a visual change.

Recently, various structures have been developed for slimming and lightening in order to secure the competitiveness of the product. One of them stacks and combines the backlight assemblies, which are optical units, on the liquid crystal display panel in which the array substrate and the color filter substrate are bonded together, and inserts them into the main frame to protect them. A display mold frame structure is fabricated.

The PCB for applying a signal to the gate pad and the data pad formed at the edge of the liquid crystal panel is connected with the flexible cable by TCP to which the drive IC is bonded, and is attached to the rear surface of the main frame of the liquid crystal display.

1 is an exploded perspective view illustrating an assembly structure of a general liquid crystal display device.

As illustrated in FIG. 1, the backlight assembly 10 is connected to a liquid crystal panel 5 in which an array substrate having a plurality of pixels in a matrix form and a color filter substrate in which R, G, and B color filters are formed in a matrix form are bonded to each other. ) Are stacked together with the main frame 21.

A gate printed circuit board (PCB) 7 for applying a driving signal is provided at one edge of the liquid crystal panel 5 with a gate pad of the liquid crystal panel 5 interposed between the gate pad and a gated taper package (TCP). It is connected by a (flexible cable).

Similarly, a data printed circuit board (PCB) 9 for applying a graphic signal to the other edge of the liquid crystal panel 5 is connected to a data pad of the liquid crystal display panel 5 by a flexible cable. Data TCP is attached to apply a signal to the liquid crystal panel 5 according to a certain scanning method.

Under the liquid crystal panel 5, a plurality of optical sheets 11 and a lamp 13 for generating light for expressing an image, and light generated from the lamp 13 is a plane light of the area of the liquid crystal panel 5. The backlight assembly 10 including the light guide plate 15 to be replaced with the light reflection plate 17 for reflecting the light leaked from the light guide plate 15 and increasing the light efficiency is attached in a stacked form.

The backlight assembly 10 is inserted into the main frame 21 in a stacked form for optical alignment, while protecting it from external impact. In addition, the panel guide 3 is assembled to protect the plurality of optical parts stacked inside the main frame 21, thereby preventing damage from external shock or vibration and preventing optical misalignment.

When the main frame 21 and the panel guide 3 are integrally assembled as in the above, the liquid crystal panel 5 is seated on the panel guide 3, and then a lower cover (back) is provided on the back of the main frame 21. 22) and the upper case is assembled to the upper region of the liquid crystal panel 5.

The upper case 1 and the lower cover 22 serve to ground the PCB connected to the liquid crystal display panel while protecting the liquid crystal display panel and the backlight assembly.

2 is a view for explaining the assembly structure of the edge region of the liquid crystal panel according to the prior art.

As shown in FIG. 2, the backlight assemblies 11, 13, 15, and 17 are inserted into the main frame 21, and the lower cover 22 is assembled with the main frame 21. 11, 13, 15, and 17) are being fixed.

The lamp 13 of the backlight assembly 11, 13, 15, or 17 is disposed at one side of the main frame 21 in parallel to one side edge direction of the light guide plate 15 and the reflecting plate 17 by the lamp housing 31. The upper portion and the lower portion of the lamp housing 31 are disposed while fixing one edge of the light guide plate 15 and the reflecting plate 17.

In addition, a panel guide is mounted on the main frame 21 in a state in which a lamp 13, a light guide plate 15, and a reflecting plate 17 are fixed by the liquid crystal panel, the optical sheets 11, and the lamp housing 31. 3) is coupled to the main frame 21, and then the lower cover 22 is assembled from the back of the main frame.

When the panel guide 3 is assembled to the main frame 21, the liquid crystal panel 5 is seated, and then the upper case 1 is coupled to the assembled structure of the main frame 21 and the lower cover 22. By protecting the liquid crystal panel 5, the main frame 21 and the like from the outside.

In this case, the pad region, which is an edge region of the liquid crystal panel 5, may include a first fixing portion 30a disposed at an edge region of the upper case 1 and an edge region of the panel guide 3. 2 is fixed by the fixing part (30b).

The first fixing part 30a disposed inside the upper case 1 is made of rubber, and the second fixing part 30b disposed at the edge region of the panel guide 3 is formed of the panel guide 3. It is made of plastic material which is the same material as).

Therefore, while the upper case 1 is fastened to the main frame 21, the first fixing part 30a disposed inside the upper case 1 and the second arranged on the panel guide 3 are provided. The fixing part 30b presses and fixes the pad area of the liquid crystal panel 5.

In addition, the first fixing part 30a and the second fixing part 30b serve to protect against moisture or vibration that may penetrate the liquid crystal panel 5 from the outside.

However, in the assembling structure of the liquid crystal display device according to the related art as described above, the first fixing part 30a and the panel guide 3 disposed inside the upper case 1 are fixed to fix the liquid crystal panel. The pressing phenomenon occurs by the second fixing part 30b, or the liquid crystal panel 5 is bent due to the enlarged liquid crystal panel.

FIG. 3 is a view for explaining a problem of light leakage caused by bending and crushing of the liquid crystal panel according to the related art. As illustrated, the pad region of the liquid crystal panel 5 is the first of the upper case 1. It is fixed up and down by the fixing part 30a and the 2nd fixing part 3 of the panel guide 5. As shown in FIG.

At this time, when one side edge of the liquid crystal panel 5 is severely pressed or the liquid crystal panel 5 is assembled with the main frame and the upper case 1, the light generated from the lamp is a liquid crystal. In the area where the panel 5 is pressed or the area where warpage has occurred, a phenomenon of leaking to the outside occurs.

Such light leakage phenomenon degrades the screen quality of the liquid crystal display device displayed.

The present invention is applied to the liquid crystal panel by bonding by attaching the first buffer portion attached to the upper case and the second buffer portion attached to the panel guide to fix the liquid crystal panel among the components assembled in the liquid crystal display device. It is an object of the present invention to provide a liquid crystal display device capable of buffering external forces or preventing warpage.

In order to achieve the above object, the liquid crystal display device according to the present invention,

A liquid crystal display device comprising a liquid crystal panel, a panel guide, optical sheets, a backlight assembly, a main frame, a lower cover, and an upper case,

And a first buffer part attached to the panel guide formed to fix the liquid crystal panel, and a second buffer part attached to the upper case.

Here, the material of the first buffer portion and the second buffer portion is a foamed resin EPI, EPP or synthetic resin, the second buffer attached to the edge of the first buffer portion and the panel guide attached to the inside of the upper case. A part fixes the liquid crystal panel at an upper portion and a lower portion, respectively, and the first buffer portion and the second buffer portion have a thickness of the liquid crystal panel.

The bending force applied to the liquid crystal panel and the force acting in the form of mechanical depression are absorbed by the first buffer part and the second buffer part, and the first buffer part and the second buffer part fixing the liquid crystal panel. The region blocks light generated from the lamp, and the first buffer portion and the second buffer portion block moisture or vibration from being transmitted to the liquid crystal panel region.

According to the present invention, the first buffer portion attached to the upper case and the second buffer portion attached to the panel guide are attached to the liquid crystal panel to fix the liquid crystal panel among the components assembled in the liquid crystal display device. It is designed to buffer external forces or prevent bending.

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

4 is a view illustrating an assembly structure of a liquid crystal panel region of a liquid crystal display according to the present invention.

As shown in FIG. 4, the backlight assemblies 111, 113, 115, and 117 are inserted into the main frame 121, and the lower cover 122 is assembled with the main frame 121, so that the backlight assembly ( 111, 113, 115, and 117 are fixed.

The lamp 113 of the backlight assembly 111, 113, 115, and 117 is disposed at one side of the main frame 121 in parallel with one side edge of the light guide plate 115 and the reflector 117 by the lamp housing 131. The upper portion and the lower portion of the lamp housing 131 are disposed while fixing one edge of the light guide plate 115 and the reflective plate 117.

In the main frame 121, the lamp 113, the light guide plate 115, and the reflective plate 117 fixed by the liquid crystal panel 105, the optical sheets 111, and the lamp housing 131 are accommodated in the main frame 121. The panel guide 103 is coupled to the main frame 121, and then the lower cover 122 is assembled from the rear surface of the main frame 121.

When the panel guide 103 is assembled to the main frame 121, the liquid crystal panel 105 is seated, and then the upper case 101 is coupled to the assembled structure of the main frame 121 and the lower cover 122. By protecting the liquid crystal panel 105, the main frame 121 and the like from the outside.

In this case, the first buffer part 150a is disposed in the edge region of the liquid crystal panel 103 in the inner region of the upper case 101, and the panel guide 103 is disposed with the liquid crystal panel 105 interposed therebetween. The second shock absorbing part 150b is fixedly arranged in the inner region of the backplane.

The material of the first buffer portion 150a and the second buffer portion 150b is made of a synthetic resin that uses foamed EPI, foamed PPE or is used to prevent breakage of electronic products.

In addition, in order to protect the liquid crystal panel 105 from warpage or mechanical depression, the thicknesses of the first buffer part 150a and the second buffer part 150b are formed to be thicker than before.

When the liquid crystal panel 105 is pressed or warped, the buffer unit 150a or 150b may be made of a material having a high force absorbing force so as to absorb the force applied to the liquid crystal panel 105. Rather, by increasing the thickness of the buffer portion (150a, 150b) to increase the absorption time of the force was increased.

In particular, in the present invention, the size of the liquid crystal panel 105 continues to increase, and as a result, the weight of the panel increases, thereby preventing the problem of frequent occurrence of warpage and depression.

Therefore, in the present invention, even if the bending phenomenon and the mechanical depression caused by the load of the liquid crystal panel 105 occur, the first buffer unit 150a attached to the upper case 101 and the agent attached to the panel guide 103 are applied. The second buffer unit 150b absorbs the light and prevents light leakage from the lamp.

FIG. 5 is a view for explaining the prevention of light leakage due to the buffering action in the pad region of the liquid crystal panel according to the present invention. As shown, the main frame and the panel guide 103 are assembled, and then the liquid crystal Panel 105 is coupled on panel guide 103.

In addition, the upper case 101 is assembled to the liquid crystal panel 105 and the main frame from the top, and the first buffer unit 150a attached to the upper case 101 and the agent attached to the panel guide 103. 2 buffer parts 150b fix the liquid crystal panel 105.

In the first buffer unit 150a and the second buffer unit 150b, the liquid crystal panel 105 is absorbed even when warpage occurs due to the external pressing of the fixed liquid crystal panel 105 or the load of the liquid crystal panel 105. It was not bent or pressed in the assembled state.

Therefore, the light generated from the lamp does not leak in the areas of the first buffer unit 150a and the second buffer unit 150b holding the liquid crystal panel, thereby preventing light leakage.

As described in detail above, the present invention provides the combination by attaching a first buffer portion attached to the upper case and a second buffer portion attached to the panel guide to fix the liquid crystal panel among the components assembled in the liquid crystal display. As a result, the external force applied to the liquid crystal panel may be buffered or prevented from warping.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

1 is an exploded perspective view illustrating an assembly structure of a general liquid crystal display device.

2 is a view for explaining the assembly structure of the edge region of the liquid crystal panel according to the prior art.

3 is a view for explaining the problem of light leakage caused by the bending and pressing phenomenon of the liquid crystal panel according to the prior art.

4 is a view illustrating an assembly structure of a liquid crystal panel region of a liquid crystal display according to the present invention.

5 is a view for explaining the prevention of light leakage defects by the buffer action in the pad region of the liquid crystal panel according to the present invention.

* Description of the symbols for the main parts of the drawings

101: upper case 103: panel guide

105: liquid crystal panel 111: optical sheet

121: main frame 113: lamp

115: Light guide plate 117: Reflector plate

122: lower cover 131: lamp housing

150a: first buffer portion 150b: second buffer portion

Claims (7)

A liquid crystal display device comprising a liquid crystal panel, a panel guide, optical sheets, a backlight assembly, a main frame, a lower cover, and an upper case, And a first buffer portion attached to the panel guide formed to fix the liquid crystal panel, and a second buffer portion attached to the upper case. The method of claim 1, The material of the first buffer portion and the second buffer portion is a liquid crystal display device, characterized in that the foamed resin EPI, EPP or synthetic resin. The method of claim 1, And a first buffer unit attached to an inner side of the upper case and a second buffer unit attached to an edge of the panel guide to fix the liquid crystal panel at an upper side and a lower side, respectively. The method of claim 1, And the first buffer part and the second buffer part have a thickness of the liquid crystal panel. The method of claim 1, The bending force applied to the liquid crystal panel and the force acting in the form of mechanical depression are absorbed by the first buffer portion and the second buffer portion. The method of claim 1, And the light generated from the lamp is blocked in the first buffer part and the second buffer part area fixing the liquid crystal panel. The method of claim 1, And the first buffer unit and the second buffer unit block moisture or vibration from being transmitted to the liquid crystal panel region.