KR20030021384A - Apparatus for liquid crystal display - Google Patents

Abstract

PURPOSE: A liquid crystal display is provided to prevent static electricity from generating by friction between an overcoating film and rubbing fur in a rubbing process by arranging an ITO film on the overcoating film in a non-active area. CONSTITUTION: A color filter substrate(100) is divided into a non-active area(110), a black matrix(130), and an active area(150). An overcoating film(160) is formed on the whole surface of the color filter substrate to flatten the substrate and protect an RGB coloring layer formed on the active layer. An alignment film(180) is formed on the black matrix area and the active area to initially align liquid crystal. An antistatic film(200) is formed on the partial non-active area and the black matrix area to prevent the surface of the overcoating film from being exposed to the outside.

Description

Liquid Crystal Display {APPARATUS FOR LIQUID CRYSTAL DISPLAY}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a color filter substrate structure for rubbing process optimization.

In general, the manufacturing process of the liquid crystal display device is roughly divided into an array process and a cell process, and the cell process may be further divided into an alignment process, an assembly process, and a liquid crystal injection process. Here, the alignment process is the main process for determining the display image quality and the details thereof are as follows.

As illustrated in FIG. 1, the alignment process of the liquid crystal display device with respect to the color filter substrate may include an overcoating film for planarization on the upper surface of the color matrix substrate 10 on which the black matrix 12 and the color layer 14 are formed. After forming 16, an alignment layer 18 is formed on the overcoating layer 16.

Subsequently, the alignment layer 18 is cured at a high temperature of about 200 ° C. or higher, and then the alignment layer 18 is rubbed with a cylindrical roller 20 having the alignment layer 22 at a constant rotational speed. Determine the degree. At this time, the rubbing hat 22 is generally made of cotton or rayon material, the surface is a wide process margin, but may damage the screen quality due to damage of fine yarns, rayon is excellent screen quality but process margin This is known to be narrow.

In particular, as shown in FIG. 2, the boundary between the active area and the inactive area where the screen is actually implemented is that the overcoating layer 16 and the alignment layer 18 are disposed in the black matrix region 13 and the active region 15. On the other hand, only the overcoating film 16 is formed in the remaining inactive regions.

However, the liquid crystal display according to the prior art has the following problems.

In the prior art, the rubbing hair and the color substrates attached to the cylindrical rollers are in contact with a certain height. However, depending on the contact degree, the static electricity of several hundred volts (VOLT) may be generated due to the friction between the color filter substrate and the rubbing hair, which may damage the microcircuit of the substrate.

In addition, the rubbing hair is damaged by the overcoating film, and the size of the micro hairs is irregular or partly pulled out. In particular, as shown in FIG. 2, rubbing becomes uneven at the boundary portion A with the alignment film, thereby degrading the screen quality. There is a problem with knocking down.

Accordingly, the present invention has been made in order to solve the problems of the prior art, an object of the present invention is to form a film so that the overcoating film is not exposed outside the active area to improve the screen quality by preventing the rubbing hair and the overcoating film in contact with the rubbing process. It is to provide a liquid crystal display device that can be made.

1 is a cross-sectional view for explaining an alignment process in a liquid crystal display device according to the prior art.

2 is a cross-sectional view of a color filter substrate in a liquid crystal display device according to the prior art.

3 is a cross-sectional view of a color filter substrate in a liquid crystal display device according to the present invention;

4 is a plan view of a color filter substrate in a liquid crystal display device according to the present invention;

Explanation of symbols on the main parts of the drawings

100: color filter substrate 110: inactive area

130: black matrix area 150: active area

160: overcoat film 180: alignment film

200: antistatic film

In the liquid crystal display device according to the present invention for achieving the above object, in the color filter substrate divided into an inactive region, a black matrix region and an active region, an overcoating layer is formed on the entire surface of the color filter, the black matrix An alignment layer is formed on the region and the active region, and an antistatic layer is formed on the entire inactive region and the partial region of the black matrix.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view of the color filter substrate in the liquid crystal display according to the present invention, and FIG. 4 is a plan view of the color filter substrate in the liquid crystal display according to the present invention.

In the liquid crystal display according to the present invention, as shown in FIG. 3, the inactive region 110, the black matrix region 130, and the active region 150 are determined based on whether the color filter substrate 100 is actually implemented. ).

Here, an overcoat layer made of, for example, an acryl-based polymer may be formed on the entire surface of the color filter substrate 100 in order to planarize the substrate and protect an RGB colored layer (not shown) formed on the active region 150. 160 is formed. In addition, the RGB color layer (not shown) formed on the active region 150 is formed of resin (RESIN) or chromium (CHROME) according to a material constituting the black matrix.

Although not shown in the drawings, an electrode may be disposed on the overcoat layer 160 on the active region 150 depending on the configuration of the liquid crystal display device.

In addition, an alignment layer 160 is formed on the black matrix region 130 and the active region 150, and an antistatic layer 200 is formed on a portion of the inactive region 110 and the black matrix region 130. Formed.

The overcoat layer 160 and the alignment layer 180 are sequentially formed on the active region 150. The alignment layer 180 is a layer for initially aligning a liquid crystal (not shown), and is formed in a portion of the black matrix region 130 beyond the active region 150. For example, from the boundary between the active region 150 and the black matrix region 130 is formed to a predetermined distance (D), for example, a length of about 10mm or more in the direction of the black matrix region 130.

An overcoat layer 160, an antistatic layer 200, and an alignment layer 180 are sequentially formed on the black matrix region 130. The antistatic film 200 serves to prevent the surface of the overcoating layer 160 from being exposed to the outside. In addition, although not shown in the drawing, the antistatic film 200 disperses static electricity generated due to friction between the rubbing hair and the overcoating layer in the rubbing process. This is to prevent mock damage. In addition, the antistatic film 200 is preferably formed of a conductive layer for the electrostatic dispersing action, and in particular, the indium tin oxide (ITO), which is a transparent conductor, is preferably a pixel electrode (not shown) or an external connection terminal ( More preferably, the formation process can be omitted.

The antistatic film 200 on the black matrix region 130 is disposed above the overcoat layer 160 as described above, and has a predetermined distance L from the active region 150, for example, 1 to 10. It is spaced apart by 탆. If the antistatic film 200 is formed very close to the active region 150, an abnormal electric field is formed by an array substrate (not shown) to align the liquid crystal (not shown) in an undesired direction. This is because light leakage occurs.

Meanwhile, the alignment layer 180 on the active region 150 extends above the antistatic layer 200 on the black matrix region 130.

The overcoat layer 160 and the antistatic layer 200 are sequentially formed on the inactive region 110. The configuration and operation of the antistatic film 200 has been described above.

As shown in FIG. 4, in the plane of the color filter substrate having the above configuration, the alignment layer 180, the black matrix region 130, and the antistatic layer 160 are sequentially formed around the active region 150. It is a structure that there is. In particular, the cross-sectional structure obtained by cutting A-A is the cross-sectional structure of FIG.

Various embodiments can be easily implemented as well as self-explanatory to those skilled in the art without departing from the principles and spirit of the present invention. Accordingly, the claims appended hereto are not limited to those already described above, and the following claims are intended to cover all of the novel and patented matters inherent in the invention, and are also common in the art to which the invention pertains. Includes all features that are processed evenly by the knowledgeable.

As described above, the liquid crystal display according to the present invention has the following effects.

In the present invention, the ITO film is coated with the overcoating film in the inactive region, thereby suppressing the generation of static electricity due to friction between the overcoating film and the rubbing hair in the rubbing process, and minimizing damage to the rubbing hat to reduce manufacturing yield, process margin, and screen quality. There is an effect that can be improved.

Claims (4)

In the color filter substrate divided into an inactive region, a black matrix region and an active region, An overcoat layer is formed on the entire surface of the color filter, an alignment layer is formed on the black matrix region and the active region, and an antistatic layer is formed on the entire inactive region and a partial region of the black matrix. Liquid crystal display device. The method of claim 1, And the antistatic film is a conductive layer. The method of claim 2, And the conductive layer is an ITO film. The method of claim 1, And an antistatic film formed on the entire non-active area and the partial area of the black matrix is 1 to 10 mu m from the active area.