CN100410739C - Liquid crystal display panel and repairing method thereof - Google Patents

Abstract

A liquid crystal display panel and a repairing method thereof are provided, the liquid crystal display panel comprises a first substrate, a second substrate, a liquid crystal layer, a patterned partition wall and a rubber frame. The first substrate has a non-display area. The second substrate is disposed on the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. The patterned partition wall is arranged between the non-display area of the first substrate and the second substrate, surrounds the liquid crystal layer and is provided with a plurality of liquid crystal storage spaces. The rubber frame is arranged between the non-display area of the first substrate and the second substrate and surrounds the patterned partition wall. When the liquid crystal display panel has the phenomenon of liquid crystal maldistribution, part of the patterned partition walls are removed to lead the excessive liquid crystal into the liquid crystal storage space. Therefore, the invention can improve the yield and the display quality of the liquid crystal display panel.

Description

Liquid crystal display panel and its repair method

technical field

The present invention relates to a liquid crystal display (Liquid Crystal Display, LCD), and in particular to a liquid crystal display panel (Liquid Crystal Display Panel) and a repair method thereof.

Background technique

With the development of optoelectronic and semiconductor technologies, flat panel displays have also matured. Among many flat panel displays, liquid crystal displays with superior characteristics such as high image quality, high space utilization efficiency, low power consumption, and no radiation have gradually become the mainstream of the market. Wherein, the liquid crystal display includes a liquid crystal display panel and a backlight module (Backlight Module), wherein the backlight module is used to provide the light source required by the liquid crystal display panel.

A liquid crystal display panel, for example, is composed of a color filter substrate (Color Filter), an active device matrix substrate (Active Device Matrix Substrate), and a liquid crystal layer disposed between the two substrates. It should be noted that a uniform gap must be formed between the two substrates so that the liquid crystal display panel can have better display quality. Generally speaking, in order to maintain a certain gap between the two substrates, a ball-type spacer (Ball-Type Spacer) or a columnar spacer (Photospacer) is usually arranged between the two substrates. At present, the known technology has developed a liquid crystal drop injection process (One Drop Fill, ODF), so as to fill the liquid crystal between the color filter substrate and the active element array substrate.

The liquid crystal dropping process is mainly to apply heat curing (Heat Curing) glue or ultraviolet curing (Ultraviolet Curing) glue on one of the active element array substrate or the color filter substrate to form a closed area. Then, liquid crystals are dropped into the closed area. then. Laminating the active element array substrate and the color filter substrate, and bonding the two substrates by heating or irradiating ultraviolet light.

However, when the liquid crystal dropping process is not controlled properly, the amount of liquid crystal filled between the active element array substrate and the color filter substrate will be too much or too little. When the amount of liquid crystal is too small, air bubbles will appear in the liquid crystal layer, which degrades the display quality of the liquid crystal display panel. When there are too many liquid crystals, since the panel is placed upright when in use, the excess liquid crystals will be affected by gravity, resulting in uneven distribution of liquid crystals (Gravity Mura). In addition, during the burn-in test (Burn In), the liquid crystal expansion will also affect the display quality of the liquid crystal display panel.

Contents of the invention

In view of this, the object of the present invention is to provide a liquid crystal display panel with better display quality.

In addition, another object of the present invention is to provide a method for repairing a liquid crystal display panel, so as to improve the uneven distribution of liquid crystals.

Based on the above objective or other objectives, the present invention provides a liquid crystal display panel, which includes a first substrate, a second substrate, a liquid crystal layer, a patterned partition wall and a plastic frame. The first substrate has a non-display area, and the second substrate is disposed on the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The patterned partition wall is disposed between the non-display area of the first substrate and the second substrate, and the patterned partition wall surrounds the liquid crystal layer, and there are a plurality of liquid crystal storage spaces in the patterned partition wall. The glue frame is disposed between the non-display area of the first substrate and the second substrate, and the glue frame surrounds the patterned partition wall.

According to a preferred embodiment of the present invention, the patterned partition walls may have a first partition wall, a second partition wall and a plurality of third partition walls. Wherein, the first partition wall surrounds the liquid crystal layer, and the second partition wall surrounds the first partition wall. There is a gap between the second partition wall and the first partition wall, and these third partition walls are arranged between the first partition wall and the second partition wall, which separate the space in the gap, and the first partition wall, the second partition wall The partition wall, the third partition wall, the first substrate and the second substrate define the liquid crystal storage space.

According to a preferred embodiment of the present invention, the above-mentioned first partition wall and the second partition wall may be rectangular.

According to a preferred embodiment of the present invention, the material of the patterned partition wall may be a photoresist material.

According to a preferred embodiment of the present invention, the above-mentioned liquid crystal display panel can also have a black matrix layer, which is arranged between the non-display area of the first substrate and the second substrate, and the black matrix layer is located between the patterned partition wall and the first substrate between.

According to a preferred embodiment of the present invention, the above-mentioned first substrate may be an active element array substrate.

According to a preferred embodiment of the present invention, the above-mentioned second substrate may be a color filter substrate.

According to a preferred embodiment of the present invention, the material of the above-mentioned plastic frame may be thermosetting glue.

According to a preferred embodiment of the present invention, the above-mentioned plastic frame may be made of ultraviolet curing glue.

Based on the above purpose or other purposes, the present invention proposes a method for repairing a liquid crystal display panel, which is suitable for repairing the above liquid crystal display panel. When uneven liquid crystal distribution occurs in the liquid crystal display panel, the repairing method is to remove part of the patterned partition walls, so that excessive liquid crystals can be introduced into the liquid crystal storage space.

According to a preferred embodiment of the present invention, the above-mentioned method for removing part of the patterned partition wall is to use a laser, and the wavelength of the laser is in the ultraviolet region.

Based on the above, the present invention sets patterned partition walls with liquid crystal storage space on the non-display area of the liquid crystal display panel. Therefore, when the amount of liquid crystal is too much, part of the patterned partition walls can be removed to allow excess liquid crystal to flow into the liquid crystal storage space. inside the space. In this way, the distribution of liquid crystals will become more uniform, thereby improving the display quality of the liquid crystal display panel.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is a top view of a liquid crystal display panel according to a preferred embodiment of the present invention.

Fig. 2 is a schematic partial cross-sectional view along line A-A' in Fig. 1.

Fig. 3 is a partial cross-sectional schematic diagram along line B-B' in Fig. 1.

Description of main component marking

100: LCD display panel

110, 120: Substrate

112: non-display area

114: display area

130: liquid crystal layer

140: patterned partition walls

142, 144, 146: Partition wall

150: plastic frame

160a, 160b, 160c: liquid crystal storage space

170: black matrix layer

182: Non-uniform liquid crystal distribution area

184: normal area

A-A', B-B': hatching

d1: Gap

d2: width

d3: length

d4, d5: gap value

Detailed ways

Fig. 1 is a top view of a liquid crystal display panel according to a preferred embodiment of the present invention, and Fig. 2 is a partial cross-sectional view along line A-A' in Fig. 1 . Please refer to FIG. 1 and FIG. 2 together. The liquid crystal display panel 100 includes a substrate 110, another substrate 120, a liquid crystal layer 130, a patterned partition wall 140, and a plastic frame 150. The substrate 110, for example, has a display area 114 and surrounds the display area 114. The non-display area 112 outside. In one embodiment, the substrate 110 is, for example, an active element array substrate, and the active element array substrate may be a thin film transistor (ThinFilm Transistor, TFT) array substrate or a diode (Diode) array substrate.

Another substrate 120 is arranged on the substrate 110, and the substrate 120 is, for example, a color filter substrate. A plurality of red, green and blue filter films (not shown in the figure) are arranged on the substrate 120, and these filters Each film corresponds to the pixel structure on the substrate 110 , so that the liquid crystal display panel 100 can display a full-color picture. In another embodiment, the substrate 110 may be a color filter substrate, and the substrate 120 may be an active element array substrate.

The liquid crystal layer 130 is disposed between the substrate 110 and the substrate 120, and it is worth noting that the patterned partition wall 140 is disposed between the non-display area 112 of the substrate 110 and the substrate 120, and the patterned partition wall 140 surrounds the liquid crystal layer 130, And the patterned partition wall 140 has a plurality of liquid crystal storage spaces 160a, 160b, 160c.

The glue frame 150 is disposed between the non-display area 112 of the substrate 110 and another substrate 120 , and the glue frame 150 surrounds the patterned partition walls 140 . The function of the glue frame 150 is to bond the substrate 110 and the substrate 120 and to seal the liquid crystal material between the substrate 110 and the substrate 120 . In addition, in one embodiment, the material of the glue frame 150 is, for example, heat-curable glue or ultraviolet-curable glue, which can be cured by heating or irradiating ultraviolet light, respectively, so as to bond the substrate 110 and the substrate 120 .

In addition, a black matrix layer 170 may also be disposed on the liquid crystal display panel 100 , which is located between the non-display area 112 of the substrate 110 and the substrate 120 , and the black matrix layer 170 is located between the patterned partition walls 140 and the substrate 110 . Since the black matrix layer 170 surrounds the display area 114 , the black matrix layer 170 can also improve the problem of light leakage and increase the contrast of the liquid crystal display panel 100 .

In one embodiment, the substrate 110 is a substrate made of a color filter film on a thin film transistor array (Color Filter On Array, COA), and the substrate 120 is a glass substrate. At this time, the black matrix layer 170 can be made on the COA on the substrate. In another embodiment, the substrate 110 is an active device array substrate, and the substrate 120 is a color filter substrate. In this case, the black matrix layer 170 can be fabricated on the color filter substrate.

Please continue to refer to FIG. 1 and FIG. 2 , the patterned partition wall 140 includes, for example, a partition wall 142 , a partition wall 144 and a plurality of partition walls 146 . Wherein, the partition wall 142 surrounds the liquid crystal layer 130 , and another partition wall 144 surrounds the partition wall 142 . There is a gap d1 between the partition wall 144 and the partition wall 142 , and the gap d1 is, for example, 5 μm. In addition, these partition walls 146 can be arranged between the partition wall 142 and another partition wall 144 at fixed intervals, which divide the space in the gap d1, and the partition walls 142, the partition walls 144, the partition walls 146, the substrate 110 And the substrate 120 defines liquid crystal storage spaces 160a, 160b, 160c.

The planar shape of the partition walls 142 and 144 is, for example, a rectangle. And as shown in FIG. 1 , the partition walls 142 , 144 themselves have a width d2 , and the width d2 of the gaps 142 , 144 is, for example, 2 μm. The length of each partition wall 146 is d3, and the width thereof is d1 (that is, the gap d1), wherein the length d3 is, for example, 2 μm, and the width d1 is, for example, 5 μm. It is worth mentioning that the volumes of the liquid crystal storage spaces 160 a , 160 b , 160 c can be changed by changing the gap d1 , the width d2 of the partition walls 142 , 144 , or the length d3 of the partition wall 146 . In addition, the top view shapes of the partition walls 142 and 144 are not limited to the rectangle shown in FIG. 1 , and may be circular, elliptical, or other polygonal shapes, for example.

The material of the patterned partition wall 140 can be a photoresist material, so the patterned partition wall 140 can be manufactured in conjunction with a known photolithography process. In addition, since the patterned partition wall 140 is not located in the display area 114 , it will not affect the quality of the display image. It is worth mentioning that when the LCD panel 100 has uneven distribution of liquid crystals, the LCD panel 100 can be repaired. The method of repairing such a liquid crystal display panel will be described below.

When uneven distribution of liquid crystals occurs in the liquid crystal display panel 100 , the repairing method is, for example, removing part of the patterned partition wall 140 so that excessive liquid crystals are introduced into the liquid crystal storage spaces 160 a , 160 b , and 160 c. In addition, the method of removing part of the patterned partition wall 140 is to use a laser, wherein the wavelength of the laser used is in the Ultra-Violet region, and the energy used is 0.1 mJ, for example.

Fig. 3 is a partial cross-sectional schematic diagram along the B-B' section line in Fig. 1. Please refer to FIG. 3 . In more detail, the steps of the repairing method are as follows. Firstly, the respective gap values d5 and d4 of the normal region 184 and the non-uniform liquid crystal distribution region 182 are measured, wherein the gap values d5 and d4 are the distances between the substrate 110 and the substrate 120 .

Next, measure the area of the non-uniform liquid crystal distribution region 182 shown in FIG. 1 . Next, calculate the volume of the excess liquid crystal, which is (area of the non-uniform liquid crystal distribution region 182)×(gap value d4 of the non-uniform liquid crystal distribution region 182−gap value d5 of the normal region 184). Afterwards, according to the volume of the excess liquid crystal, it is determined how many patterned partition walls 140 are to be removed, so as to release enough liquid crystal storage spaces 160a, 160b, 160c.

Please continue to refer to FIG. 1 , generally speaking, since the liquid crystal display panel 100 is placed upright when in use, the liquid crystals will be affected by gravity, and most of them will be concentrated below the liquid crystal display panel 100 . Therefore, the partition wall 142 at the lower right corner or the lower left corner can be removed first, so that the liquid crystal storage space 160a can accommodate excess liquid crystal. Afterwards, it may be evaluated whether to continue to remove the partition wall 142 located in the middle of the upper and lower sides to open the liquid crystal storage space 160b. If the amount of liquid crystal is still too much, the partition wall 142 can be continuously removed to open the liquid crystal storage space 160c. However, if the amount of liquid crystal is too much, the partition walls 142 at the four corners can be cut first to open the liquid crystal storage space 160a. In addition, part of the partition walls 146 can also be removed to make the liquid crystal storage spaces 160a, 160b, 160c are connected to each other.

In summary, the liquid crystal display panel and the repairing method of the liquid crystal display panel of the present invention have the following advantages:

1. The liquid crystal display panel of the present invention is provided with a patterned partition wall in the non-display area, and the patterned partition wall has a plurality of liquid crystal storage spaces. Since the patterned partition wall is not located in the display area, it will not affect the quality of the display image.

2. When the distribution of liquid crystals is uneven, part of the partition wall can be removed to open the liquid crystal storage space. In this way, the liquid crystal can flow into the liquid crystal storage space, so that the abnormal display area can be reduced or disappeared.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (11)

1. display panels is characterized in that comprising:

First substrate has non-display area;

Second substrate is arranged on above-mentioned first substrate;

Liquid crystal layer is arranged between above-mentioned first substrate and above-mentioned second substrate;

The patterning spaced walls is arranged between the non-display area and above-mentioned second substrate of above-mentioned first substrate, and above-mentioned patterning spaced walls centers on above-mentioned liquid crystal layer, and has a plurality of liquid crystal storage area in the above-mentioned patterning spaced walls, and above-mentioned patterning spaced walls comprises:

First spaced walls is around above-mentioned liquid crystal layer;

Second spaced walls, around above-mentioned first spaced walls, and this second spaced walls and above-mentioned first spaced walls gap that is separated by; And

A plurality of the 3rd spaced walls, above-mentioned a plurality of the 3rd spaced walls is disposed at gap between above-mentioned first spaced walls and above-mentioned second spaced walls to set spacing, and connect above-mentioned first spaced walls and above-mentioned second spaced walls, space in the above-mentioned gap is separated, and above-mentioned first spaced walls, above-mentioned second spaced walls, above-mentioned the 3rd spaced walls, above-mentioned first substrate and above-mentioned second substrate define above-mentioned liquid crystal storage area; And

The glue frame is arranged between the non-display area and above-mentioned second substrate of above-mentioned first substrate, and this glue frame is around above-mentioned patterning spaced walls.

2. the display panels according to claim 1 is characterized in that above-mentioned first spaced walls and above-mentioned second spaced walls are rectangle.

3. the display panels according to claim 1 is characterized in that the material of above-mentioned patterning spaced walls comprises photoresist.

4. the display panels according to claim 1 is characterized in that also comprising black matrix layer, is arranged between the non-display area and above-mentioned second substrate of above-mentioned first substrate, and should deceives matrix layer between above-mentioned patterning spaced walls and above-mentioned first substrate.

5. the display panels according to claim 1 is characterized in that above-mentioned first substrate comprises active elements array substrates.

6. the display panels according to claim 1 is characterized in that above-mentioned second substrate comprises colored optical filtering substrates.

7. the display panels according to claim 1 is characterized in that the material of above-mentioned glue frame comprises heat-curable glue.

8. the display panels according to claim 1 is characterized in that the material of above-mentioned glue frame comprises ultraviolet curing glue.

9. the method for repairing and mending of a display panels is characterized in that being suitable for the described display panels of claim 1 is repaired, and when liquid crystal skewness phenomenon appearred in above-mentioned display panels, this method for repairing and mending comprised:

Remove the above-mentioned patterning spaced walls of part, so that excessive liquid crystal imports in the above-mentioned liquid crystal storage area.

10. according to the method for repairing and mending of the described display panels of claim 9, the method that it is characterized in that removing the above-mentioned patterning spaced walls of part is to utilize laser.

11., it is characterized in that above-mentioned Wavelength of Laser is positioned at the ultraviolet light zone according to the method for repairing and mending of the described display panels of claim 10.

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