KR20060020317A - Liquid crystal display device - Google Patents

Abstract

The present invention discloses a liquid crystal display device capable of preventing light leakage caused by the load when a liquid crystal panel made of a large size glass substrate is assembled to a guide panel. Disclosed is a liquid crystal display device in which a liquid crystal panel, a guide panel, an upper cover, a lower cover, and a backlight assembly are assembled, wherein a plurality of light leakage preventing pads are attached along an area of the guide panel where the liquid crystal panel is assembled. do.

Here, the light leakage pad has a plurality of laminated structures of a hard layer, a soft layer and a tape, the hard layer is formed of a polyethylene-based resin (PET), the soft layer is a synthetic rubber-based component (BUMPON) Is formed, the tape is one side is attached to the soft layer, the other side is characterized in that the double-sided tape to which the guide panel is attached.

LCD, LCD, hard layer, soft layer, light leakage, stress

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

1 is an exploded perspective view of a direct type liquid crystal display device according to the related art.

Figure 2a is a plan view of a direct type liquid crystal display device according to the prior art.

FIG. 2B is an enlarged view of region A of FIG. 2A with the top cover disassembled; FIG.

3 is a sectional view taken along the line BB ′ of FIG. 2B.

Figure 4 is a plan view of the guide panel attached to the light leakage prevention pad in accordance with the present invention.

FIG. 5 is a cross-sectional view taken along the line CC ′ of FIG. 4. FIG.

6 is a cross-sectional view showing the structure of the light leakage preventing pad of FIG.

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

203: guide panel 205: liquid crystal panel

230: light leakage prevention pad 230a: hard layer

230b: soft layer 230c: double-sided tape

231: buffer pad 250: bolt

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing light leakage caused by the load when a liquid crystal panel made of a large size glass substrate is assembled to a guide panel. will be.

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 CRT due to their advantages such as miniaturization, light weight, and low power consumption, and nowadays, almost all information processing devices requiring display devices are required. It is the situation that is attached.

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.

In general, a backlight used as a light source of a liquid crystal display device is a method of disposing a cylindrical light emitting lamp, and is divided into an edge method and a direct method.

In the double edge method, a lamp unit is installed on the side of the light guide plate for guiding light, and the lamp unit surrounds a lamp emitting light, a lamp holder inserted into both ends of the lamp to protect the lamp, and an outer circumferential surface of the lamp. One side is fitted to the side of the light guide plate has a lamp reflector for reflecting the light emitted from the lamp toward the light guide plate.

As such, the edge method in which the lamp unit is installed on the side of the light guide plate is mainly applied to a liquid crystal display device having a relatively small size, such as a monitor of a laptop computer and a desktop computer, and has good light uniformity and a long durability life. It is advantageous to thin the liquid crystal display device.

On the other hand, the direct type method has been developed mainly as the size of the liquid crystal display device has increased to 20 inches or more, and a plurality of lamps are arranged in a row on the lower surface of the diffuser plate to direct light directly to the front of the LCD panel. will be.

The direct method is mainly used for a large screen liquid crystal display device requiring high luminance because the light utilization efficiency is higher than that of the edge method.

1 is an exploded perspective view of a direct type liquid crystal display device according to the prior art.

As shown in FIG. 1, a liquid crystal panel 105 in which R, G, and B color filters are formed between a lower substrate on which a plurality of pixels are formed in a matrix type and an R, G, and B color filters are bonded together; A guide panel 103 for fixing the liquid crystal panel 105, a plurality of lamps 113 for generating a light source under the liquid crystal panel 105, and the plurality of lamps 113 are fixed at predetermined intervals. It is composed of a lamp holder 111.

An optical sheet 107 and a diffuser plate 108 are disposed between the liquid crystal panel 105 and the lamps 113, and the optical sheet 107 and the diffusion plate 108 are disposed at both sides. It is fixed by the support frame (support frame: 110a, 110b) in.

In addition, a reflector plate 117 is attached to the inner side of the lower cover 120 to reflect the light generated from the lamp 113 to improve the reflectance under the lamp 113.

That is, the liquid crystal panel 105, the optical sheet 107, the diffusion plate 108, the support frames 110a and 110b, the lamp 113, and the reflector plate 117 are stacked on the lower cover 120. The lower cover 120 is fastened to the top cover 101.

An inverter 123 for supplying power is attached to the bottom of the lower cover 120, and an inverter cover shield 124 is attached to an upper portion of the inverter 123.

Although shown in the figure, 121 that is not described serves to shield static electricity, etc. applied from the outside as a cover shield.

FIG. 2A is a plan view of a direct type liquid crystal display device according to the related art, and FIG. 2B is an enlarged view of region A of FIG. 2A with the top cover disassembled.

As shown in FIG. 2A and FIG. 2B, as described above with reference to FIG. 1, when the guide panel and the lower cover are fastened, the liquid crystal panel 105 is positioned above the guide panel, and below the liquid crystal panel 105. A backlight assembly consisting of sheets, lamps is placed.

When the liquid crystal panel 105 and the backlight assembly are assembled in this way, the top cover 101 is assembled.

The upper cover 101 has a rectangular frame shape in which an area corresponding to the liquid crystal panel 105 is opened, and the upper cover 101 covers an entire guide panel region to which the liquid crystal panel 105 is fixed. The cover is assembled with the lower cover.

Accordingly, when the upper cover 101 is separated, the guide panel 103 is assembled by a lower cover and a fastening means such as a bolt or a nut.

As shown in FIG. 2B, when the upper cover 101 is disassembled in the enlarged area of FIG. 2A, the guide panel 103 is not clearly shown in the drawing, but the guide panel 103 is fastened to the assembled lower cover. It's a rescue.

The liquid crystal panel 105 is assembled in the central region of the guide panel 103, and optical sheets and lamps are assembled under the liquid crystal panel 105.

3 is a cross-sectional view taken along the line BB ′ of FIG. 2B.

As shown in FIG. 3, the liquid crystal panel 105 and the guide panel 103 are assembled in FIG. 2B with the top cover removed.

A liquid crystal panel 105 is fastened on the guide panel 103, and a buffer pad 131 is provided on the guide panel 103 to protect the surface of the liquid crystal panel 105 when the guide panel 103 is in contact with the guide panel 103. Attached to the

In addition, the support 130 for supporting the load of the liquid crystal panel 105 is integrally formed with the guide panel 103 in the fastening region of the guide panel 103 in contact with the corner region of the liquid crystal panel 105. It is.

Support portions 130 for supporting the load of the liquid crystal panel 105 are formed on both edges of the guide panel 103, so that the load transmitted from the liquid crystal panel 105 can be supported in both corner regions. .

However, in the prior art as described above, since the support part formed on the guide panel to support the liquid crystal panel is a mold frame made of the same material as the guide panel, light leakage occurs due to a large stress due to the load of the liquid crystal panel. there is a problem.

In order to relieve the stress of the liquid crystal panel, a pad of soft material is attached to the support area of the guide panel. In the case of the soft material, light leakage can be blocked, but the area where the liquid crystal panel and the guide panel contact each other. There is a problem in that foreign matter accumulates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device which eliminates light leakage defects caused by a load of a liquid crystal panel by attaching a light leakage prevention pad mixed with hard and soft to a guide panel fastened to the liquid crystal panel.

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 guide panel, an upper cover, a lower cover, and a backlight assembly,

A plurality of light leakage prevention pads are attached along a guide panel area in which the liquid crystal panel is assembled.                     

Here, the light leakage pad has a plurality of laminated structures of a hard layer, a soft layer and a tape, the hard layer is formed of a polyethylene-based resin (PET), the soft layer is a synthetic rubber-based component (BUMPON) Is formed, the tape is one side is attached to the soft layer, the other side is characterized in that the double-sided tape to which the guide panel is attached.

And the light leakage preventing pad is characterized in that to prevent light leakage defects, while relieving the load of the liquid crystal panel.

According to the present invention, by attaching a light leakage prevention pad in which hard and soft are mixed to the guide panel fastened to the liquid crystal panel, there is an advantage of removing the light leakage defect caused by the load of the liquid crystal panel.

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

Figure 4 is a plan view of the guide panel is attached to the light leakage prevention pad according to the present invention.

As shown in FIG. 4, in the assembly structure of the liquid crystal display device, the liquid crystal panel 205 is assembled to the guide panel 203, and polyethylene resin (PET) and polyethylene resin are formed at both edge regions of the guide panel 203. The light leakage preventing pad 230 in which the same hard material and the soft material such as synthetic rubber (BUMPON) are stacked is attached.

That is, unlike the prior art, when the guide panel 203 is manufactured, the light leakage preventing pad 230 is attached to a specific region of the guide panel 203 assembled with the liquid crystal panel 205.

As such, the guide panel 203 to which the light leakage preventing pad 230 is attached is fastened to the lower cover in which the backlight assembly is assembled in a stacked form.

The light leakage preventing pad 230 may attach a plurality of light leakage preventing pads 230 along an area where the guide panel 203 and the liquid crystal panel 205 are assembled to buffer a load generated from the liquid crystal panel 205. have.

In addition, in order to support the load of the liquid crystal panel 205, only one may be attached to and supported at both edge regions of the guide panel 203.

As described above, according to the present invention, the problem that large stress occurs in the area where the liquid crystal panel and the guide panel are in contact with each other due to the increase in size of the liquid crystal panel has been solved using the light leakage preventing pad 230.

FIG. 5 is a cross-sectional view taken along the line CC ′ of FIG. 4.

As shown in FIG. 5, a liquid crystal panel 205 is assembled to the guide panel 203, and a polyethylene-based resin is formed in an area where the corner region of the liquid crystal panel 205 and the guide panel 203 contact each other. The formed hard layer 230a, a soft layer 230b made of a synthetic rubber component, and a double-sided tape 230c for contact with the guide panel 203.

In addition, a buffer pad 231 is attached to a lower surface of the liquid crystal panel 205 and an area in contact with the guide panel 203 to prevent surface damage of the liquid crystal panel 205.

One side surface of the double-sided tape 230c of the light leakage preventing pad 230 is attached to the guide panel 203, and the other side thereof is attached to the soft layer 230c of the light leakage preventing pad 230.

The light leakage preventing pad 230 attached as described above supports the load of the liquid crystal panel 205, and the part contacting the edge region of the liquid crystal panel 205 is formed of the hard layer 230a, and thus, the foreign matter is not in contact with the liquid crystal panel 205. This does not happen.

In addition, a soft layer 230b is attached to a lower portion of the hard layer 230a of the light leakage preventing pad 230, thereby minimizing stress caused by the liquid crystal panel 205 due to the load of the liquid crystal panel 205. It was to be able to prevent.

Therefore, in the present invention, the light leakage preventing pad 230 attached to the guide panel 203 buffers the load received from the liquid crystal panel 205 and makes a portion in contact with the liquid crystal panel 205 as the hard layer 230a. Foreign material generation in the contact area was eliminated.

Although shown in the figure, 250, which is not described, is a bolt.

6 is a cross-sectional view illustrating a structure of the light leakage preventing pad of FIG. 4.

As illustrated in FIG. 6, the light leakage preventing pad 230 formed a synthetic rubber-based soft layer 230b on the double-sided tape 230c, and a polyethylene-based resin on the soft layer 230b. Phosphorus hard layer 230a is formed.

 As described above, the light leakage preventing pad 230 has a triple layer structure, and the part in contact with the liquid crystal panel 205 is formed of the hard layer 230a, so that the foreign matter caused by the contact of the liquid crystal panel 205. Occurrence was minimized.

The soft layer 230b is inserted directly below the hard layer 230b to prevent stress caused by the load of the liquid crystal panel 205.

Although the structure of the light leakage leaving pad 230 has been described based on the triple layer of the hard layer 230a, the soft layer 230b, and the double-sided tape 230c, the hard layer 230a and the soft layer 230b are plural. It can be formed into two laminated structures.

Therefore, the light leakage preventing pad 230 according to the present invention prevents foreign matters from occurring in the area in contact with the liquid crystal panel 205 while preventing light leakage due to the load of the liquid crystal panel 205.

As described in detail above, the present invention has an effect of removing the light leakage defect caused by the load of the liquid crystal panel by attaching a light leakage prevention pad mixed with hard and soft to the guide panel fastened to the liquid crystal panel.

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.

Claims (6)

A liquid crystal display device comprising a liquid crystal panel, a guide panel, an upper cover, a lower cover, and a backlight assembly, And a plurality of light leakage preventing pads are attached to a guide panel area in which the liquid crystal panel is assembled. The method of claim 1, And the light leakage pad has a plurality of stacked structures of a hard layer, a soft layer, and a tape. The method of claim 2, The hard layer is a liquid crystal display device, characterized in that formed of polyethylene-based resin (PET). The method of claim 2, The soft layer is a liquid crystal display device, characterized in that formed of a synthetic rubber component (BUMPON). The method of claim 2, The tape is one side is attached to the soft layer, the other side is a liquid crystal display, characterized in that the double-sided tape to which the guide panel is attached. The method of claim 1, The light leakage preventing pad may reduce light leakage while preventing a load of the liquid crystal panel.

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