KR20070071292A - Liquid crystal display device - Google Patents

Abstract

An LCD(Liquid Crystal Display) is provided to stably fix an LCD panel and a support main even without a top case and a bottom cover, by using locking pieces to directly fix the LCD panel and the support main to each other. An LCD panel(201) is composed of a thin film transistor array substrate, a color filter array substrate, a liquid crystal layer between the two substrates. An upper polarizing plate(203a) and a lower polarizing plate are respectively formed on an upper portion and a lower portion of the LCD panel. A support main(205) edges the LCD panel. A plurality of locking pieces(209) fix the LCD panel and the support main. A plurality of first holes are formed in a peripheral region of the LCD panel, wherein the locking pieces penetrate the first holes respectively. The support main has a plurality of second holes respectively corresponding to the first holes.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

1 is a schematic exploded view of a liquid crystal display according to the related art.

2 is a cross-sectional view showing a liquid crystal display device according to the prior art.

3 is a plan view of the liquid crystal display device of the present invention.

4 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention.

5 is a cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention.

** Explanation of symbols for main parts of drawings **

201a: color filter substrate

201b: thin film transistor array substrate

203a, 203b: polarizer

205: main support

207: backlight unit

209a, 209b: locking piece

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a structure capable of stably fixing components such as a liquid crystal panel, a support main, and a backlight unit without using a top case and a bottom cover as components. will be.

In general, a liquid crystal display device includes a liquid crystal panel comprising a thin film transistor array substrate (hereinafter referred to as a lower plate), a color filter substrate (hereinafter referred to as an upper plate), and a liquid crystal layer formed therebetween, And a backlight unit attached to upper and lower surfaces to polarize light, and a backlight unit including a light source, an optical sheet, and a light guide plate for supplying constant light to the liquid crystal panel. Here, the liquid crystal panel is a component of the liquid crystal display for displaying a desired image by switching the liquid crystal cells in accordance with an image signal input from the outside.

1 is a schematic exploded view of a liquid crystal display according to the prior art.

As shown in FIG. 1, the liquid crystal display is divided into a backlight unit 109 and a liquid crystal panel 101. The backlight unit 109 and the liquid crystal panel 101 are supported by support frames such as the support main 113, the top case 111, and the bottom cover 115. The support main 113 is generally made of a plastic material, and the backlight unit 109 and the liquid crystal panel 101 are accommodated therein.

Here, the backlight unit 109 is a reflection plate 109a, a light guide plate 109b, a diffusion sheet 109c, a first prism sheet 109d, and a second prism sheet 109e which are sequentially stacked inside the support main 113. ), A protective sheet 109f. In addition, the liquid crystal panel 101 is positioned above the backlight unit 109.

The liquid crystal panel 101 is supported by a guide panel (not shown) provided inside the support main 113. The upper and lower surfaces of the liquid crystal panel 101 are equipped with an upper polarizing plate 103a and a lower polarizing plate 103b, and a flexible printed circuit (FPC) having a printed circuit board 107 attached to a side thereof. 105) or Flexible Flat Cable (FFC) 105 is attached.

On the other hand, the liquid crystal panel 101, unlike the cathode ray tube (CRT: cathode ray tube) is not a device that emits light by itself requires a separate light source for providing light from the bottom. As the light source, a cold cathode fluorescent lamp (CFL) is mainly used. The lamp 117 is mounted on one side or both sides of the lower support main 113, and one side or both side surfaces of the light guide plate 109b are mounted to face the lamp 117. The light guide plate 109b uniformly emits light incident from the lamp 117 toward the liquid crystal panel.

On the other hand, the structure of the frame and the fastening structure for supporting the outside of the liquid crystal panel 101 and the backlight unit 109 will be described as follows.

2 is a cross-sectional view showing a fastening structure of the support frame according to the prior art.

As shown in FIG. 2, the liquid crystal panel 101 and the backlight unit 109 are accommodated inside the support main 113. A top case 111 is mounted along an upper edge of the support main 113, and a bottom cover 115 is mounted at a lower portion thereof. Here, the top case 111 and the bottom cover 115 is generally made of a metal material.

Meanwhile, a plurality of hooks 111a are formed on the side surface of the top case 111 by piercing. In addition, holes 115a to which the hook 111a is fastened are also formed on the side surface of the bottom cover 115 by a piercing process.

Here, the piercing process refers to a process of punching a hole on one side using a punch and at the same time protruding adjacent portions of the hole. That is, one side of the top case 111 is drilled to create a hole, and the adjacent portion of the hole is bent. In particular, the end of the top case 111 is bent to become the hook (111a). In addition, after the bottom cover 115 is punched as described above, bending is performed.

The hook 111a is elastically deformed to slide along the side of the bottom cover 115 and then inserted into and fixed to the hole 115a. Thus, the top case 111 and the bottom cover 115 are fastened to each other and fixed. Here, the flexible printed circuit (FPC) 105 or the flexible flat cable 105 (FFC) connected to one end of the liquid crystal panel 101 passes adjacent to the hook 111a. It is bent to the lower side of the support main 113. Although not shown separately, the hook or hole may be formed in the support main 113, in which case the top gate 111 and the bottom cover 115 are supported by the hook and hole in the support main 113. It has a structure that is fastened with.

However, the liquid crystal display device according to the related art as described above has the following problems.

First, since the hook and the hole is formed by breaking one side by the piercing process, the end is not formed smoothly but sharply formed. Therefore, when a circuit component such as TCP is in contact with the corner, scratches may occur, and there is a problem of disconnecting some circuits.

Second, when the hook is rubbed while sliding along the side of the bottom cover, metallic particles are generated at its corners, and the particles are in contact with circuit components such as TCP, thereby causing scratches, thereby damaging some circuits. .

Third, the external dust or the like formed by the piercing process flows into the liquid crystal display, thereby degrading the quality.

In addition to the above problems, since the top case and the bottom cover must be manufactured in different shapes and sizes for each model, it is also a cause of increase in production cost.

Other objects and features of the present invention will be described in the configuration and claims of the invention described below.

The present invention is to solve the above-mentioned problem, the liquid crystal display device according to the present invention mentioned above by directly fixing the support main and the liquid crystal panel without applying the top case and the bottom cover using a locking piece (locking piece) It aims to solve one problem.

According to an aspect of the present invention, there is provided a liquid crystal display device comprising: a liquid crystal panel including a thin film transistor array substrate, a color filter substrate, and a liquid crystal layer filled therebetween; Polarizers attached to upper and lower portions of the liquid crystal panel, respectively; A support main surrounding the edge of the liquid crystal panel; And a plurality of locking pieces that unite and fix the liquid crystal panel and the support main.

At this time, the liquid crystal display device is divided into a vertical electric field type and a horizontal electric field type according to the direction of the electric field for driving the liquid crystal, the configuration of the liquid crystal panel is changed accordingly.

First, in the vertical field type liquid crystal display device, a gate electrode, a gate insulating layer, a semiconductor pattern, a source / drain electrode, a pixel electrode, etc. are formed on a thin film transistor array substrate, and a black matrix, a color filter pattern, a common electrode, etc., are formed on a color filter substrate. As a result, an electric field is formed in a structure in which the pixel electrode and the common electrode face each other. A liquid crystal layer is provided between the two substrates to control the transmittance of light generated from the backlight, and upper and lower polarizers are attached to upper and lower portions of the liquid crystal panel, respectively.

On the other hand, in the horizontal field type liquid crystal display, a common electrode is further formed on the thin film transistor array substrate in addition to the gate electrode, the gate insulating layer, the semiconductor pattern, the source / drain electrode, and the pixel electrode which are components of the vertical field type liquid crystal display. . In addition, although a black matrix and a color filter pattern are formed on the color filter substrate, since the common electrode is formed on the thin film transistor array substrate, the formation of the color filter substrate is unnecessary. The liquid crystal layer, which is another component of the liquid crystal panel, should be selected as a kind having optical anisotropy according to the electric field in the horizontal direction, and the remaining components including the polarizing plate are similar to the vertical field type liquid crystal display device.

The present invention does not have a fundamental difference in the case of applying to the vertical field type liquid crystal display device and the case of applying to the horizontal field type liquid crystal display device, and thus the following description will be continued regardless of the type of the liquid crystal panel. .

A backlight unit is mentioned as a component of this invention other than a liquid crystal panel. The backlight unit may be divided into an edge type backlight unit and a direct type backlight unit according to the position where the lamp is provided. However, the present invention is applicable to both types, so that the following detailed description will be provided with an edge type backlight unit having a light guide plate. The structure of the liquid crystal display device of this invention is demonstrated using the provided liquid crystal display device.

3 is a view of the liquid crystal display of the present invention viewed from the front of the upper substrate of the color filter.

As shown in FIG. 3, an upper polarizing plate 203a is attached to the screen display area on the upper portion of the color filter substrate 201a, and electrode pads 211 of various wirings are disposed around the thin film transistor array substrate 201b of the liquid crystal panel. Is formed. A flexible printed circuit (FPC) or a flexible flat cable (FFC: 213) is crimped on the upper part of the electrode pad 211 and bent and connected to the lower part of the liquid crystal panel. Although not shown in the above, the flexible printed circuit (FPC) or the flexible flat cable (FFC: FFC) is a printed circuit having a driving circuit for applying a driving signal to the thin film transistor. It is reconnected with the PCB (Printed Circuit Board PCB).

Holes penetrating the upper and lower substrates 201a and 201b are formed between the electrode pads 211 of the outer portion of the liquid crystal panel, and the support main 205 disposed below the liquid crystal panel corresponds to the holes formed in the substrate. The hole is formed again. A locking piece 209 is inserted into the hole formed in the substrate and the hole formed in the support main 205 to fix the liquid crystal panels 201a and 201b and the support main 205. The holes and the locking pieces 209 are formed in plural numbers, and the numbers thereof may be changed according to the size of the liquid crystal display.

Next, a first embodiment of the present invention will be described in more detail with reference to FIG. 4, which is taken along the line A-A 'of FIG.

First, the liquid crystal panel 201 where the thin film transistor array substrate 201a and the color filter substrate 201b are bonded to each other is supported on the support main 205. Although liquid crystal is filled between the upper and lower substrates, the drawings are omitted in the drawing, and upper and lower surfaces of the liquid crystal panel 201 are attached with upper and lower polarizers 203a and 203b, respectively.

A lower portion of the support main 205 is provided with a mounting portion 205a for supporting the backlight unit 207, and a lamp (not shown) and an optical sheet 207a and 207b on the mounting portion 205a. The backlight unit 207 composed of the light guide plate 207c, the reflecting plate 207d, and the like is positioned. In this case, the optical sheet is formed by stacking the diffusion sheet 207a and the prism sheet 207b, and although not shown in the drawing, a protective sheet may be stacked thereon.

As described above, the liquid crystal display of the present invention is composed of various components including the liquid crystal panel 201 and the support main 205, and a locking piece, which is a key component of the present invention, for fixing the components. , 209a) is used.

The locking piece (209a) is inserted into the holes formed in the outer portion of the support main 205 and the liquid crystal panel 201 to fix the parts, the structure is based on the fastening structure consisting of bolts and nuts In addition, a washer may be provided between the lower end of the head of the bolt and the upper end of the color filter substrate. The washer (not shown in the drawing) serves to further tighten the fastening function of a general washer, and when the bolt and nut are made of a high strength material such as metal, the upper substrate 201a is generally made of glass. It also acts as a shock absorber.

In addition, as shown in FIG. 4, the hole periphery of the upper surface of the liquid crystal panel into which the locking piece 209a is inserted is equal to the thickness of the head portion of the bolt constituting the locking piece 209a. It can prevent the head of the bolt is formed higher than the upper portion of the support main. In addition, a step is formed so that the lower end of the locking piece 209a is positioned higher than the lower surface of the support main in the hole periphery of the lower portion of the support main 205 into which the locking piece 209a is inserted. By the above configuration, the thickness of the liquid crystal display device of the present invention can be reduced.

Since the liquid crystal display of the present invention does not apply the top case used in the prior art, the support main 205 is inevitably exposed to the outside. However, since the liquid crystal display is mostly manufactured by forming a system with a peripheral device such as a notebook rather than being used alone, a cover of the system (ie, a notebook) covers the support main 205 part. No cosmetic problems shall arise.

Next, a second embodiment of the present invention will be described with reference to FIG.

As shown in Fig. 5, the basic structure of the second embodiment is similar to that of the first embodiment. However, what is different from the first embodiment is the configuration of the locking piece 209b.

In the first embodiment, the locking piece 209b of the second embodiment has a 'open wedge' shape, whereas a locking piece 209a consisting of a bolt and a nut is applied. 'Open wedge shape' is formed in the form of a nail, including the head as a whole, but the end is divided into two branches to the middle, the open end is a form provided with a locking device. Since the flared portion of the locking piece 209b is elastic, it may be inserted into a hole formed in the liquid crystal panel 201 and the support main 205. And once it is inserted into the hole, the holding device is fixed to the lower surface of the support main 205 by maintaining the open form again, the structure that can firmly fix the liquid crystal panel 201 and the support main 205 to be.

The locking piece 209b of the second embodiment has a locking piece 209b in a hole formed in the liquid crystal panel 201 and the support main 205 without a bolt and nut fastening process, unlike in the first embodiment. Since the fixing is completed just by pushing the), it has the effect of improving the work efficiency during assembly. On the other hand, once the locking piece 205b of the second embodiment has been tightened once, the locking piece 205b is separated from the locking piece 209b for disassembly, etc. It has the disadvantage of requiring effort.

On the other hand, as shown in Figure 5, the second embodiment also forms a step in the periphery of the hole in the upper surface of the upper surface of the liquid crystal panel and the periphery of the hole in the lower support main 205 as in the first embodiment, the reason Is as described in the first embodiment.

The locking piece 209b of the second embodiment must be made of an elastic material to perform the function as described above. This is because the locking piece (209b) maintains its original open form when no force is applied from the outside, and when the hole enters the hole, the opened piece must shut down with elasticity, and after tightening, This is because the original open form must be maintained. Therefore, the locking piece (209b) may be made of a metal having elasticity, or may be made of an organic polymer having a certain degree of elasticity.

Also in the second embodiment, as in the case of the first embodiment, the support main unit 205 may be provided with mounting portions 205a for fixing the backlight unit 207, The thickness of the liquid crystal display device may be reduced by forming a stepped portion as in the first embodiment. It is also the same that the appearance does not occur by the system cover.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

As described above, the liquid crystal display according to the present invention does not apply the top case or the bottom cover, or does not apply both parts, and uses the locking piece to lock the liquid crystal panel, the support main and the backlight unit. Assemble Therefore, it is possible to fundamentally solve problems such as damage to circuit components that may occur in the conventional method of assembling the components by the hook method.

In addition, it is possible to reduce the thickness of the liquid crystal display device by omitting the application of the top case and the bottom cover, and locking pieces such as the top case and the bottom cover, which had to be variously manufactured by the model or the size of the liquid crystal panel. It is possible to reduce the manufacturing cost of the liquid crystal display device by unifying it into a piece called a piece).

Claims (12)

A liquid crystal panel comprising a thin film transistor array substrate, a color filter substrate, and a liquid crystal layer filled therebetween; Polarizers attached to upper and lower portions of the liquid crystal panel, respectively; A support main surrounding the edge of the liquid crystal panel; And And a plurality of locking pieces for fixing the liquid crystal panel and the support main together. The method of claim 1, The liquid crystal panel has a plurality of holes through which the locking piece can pass, and the support main has the same number of holes corresponding to the plurality of holes formed in the periphery of the liquid crystal panel. Liquid crystal display device characterized in that. The method of claim 2, The liquid crystal display according to claim 1, wherein a step is formed at the periphery of the upper surface of the liquid crystal panel, the level of which is equal to the thickness of the head of the bolt forming the locking piece. The method of claim 1, And the locking piece comprises a bolt and a nut. The method of claim 1, And the locking piece comprises a bolt, a nut and a washer. The method of claim 1, The locking piece (locking piece) characterized in that the 'open wedge shape' characterized in that the liquid crystal display device. The method of claim 6, The locking piece consisting of the 'opened wedge shape', is elastic A liquid crystal display device made of a material. The method of claim 7, wherein The elastic material is a liquid crystal display device, characterized in that the metal. The method of claim 7, wherein The elastic material is an organic polymer, characterized in that the liquid crystal display device. The method according to any one of claims 1 to 9, The liquid crystal display device is characterized in that the backlight unit is mounted on the lower portion of the liquid crystal panel. The method of claim 10, And a seating part formed in the support main to fix the backlight unit. The method of claim 11, The support main liquid crystal display device, wherein a step is formed at a periphery of a lower hole in which the locking piece is inserted, such that the lower end of the locking piece is positioned higher than the lower surface of the support main.

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