JP2002341329A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome such problems of a liquid crystal display device in which liquid crystal is filled by forming protruded patterns on one substrate of the two parallel substrates and gaps between the other substrate, wherein light escaping is caused due to a portion where the rubbing is not uniformly performed in the vicinity of protruded patterns in rubbing to degrade image quality, and when arranging patterns covering the light escaping portion by the light shielding layer in the whole pixel to prevent the light escaping, opening ratios fall down to deteriorate luminance. SOLUTION: Only a light shielding layer 6b of a pixel where protruded patterns 11 is disposed is extended to form a light shielding part 6c at the lower part in the rubbing direction of the protruded patterns in the opening part 6d and the extended light shielding part is not formed about a light shielding layer 6a in a pixel where the protruded patterns are not disposed to widen the opening part 6d, thereby achieving a liquid crystal display device having high image quality and high luminance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a projection pattern is provided on one of two substrates parallel to each other, a gap is formed between the two substrates by the projection pattern, and liquid crystal is filled. The present invention relates to a liquid crystal display device.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional liquid crystal display device of this kind. FIG. 3 is an enlarged view of a light shielding layer.
FIG. 4 is a sectional view of the liquid crystal display device taken along the line BB in FIG.
As shown in FIGS. 3 and 4, an array chip 2 and an alignment layer 3 are disposed on a glass substrate 1 to form a thin film transistor substrate 4 (hereinafter, a thin film transistor is referred to as a TFT). A light-shielding layer 6, a colored layer 7, a counter electrode 8, and an alignment layer 9 are laminated on the glass substrate 5 in this order, and a projection pattern 11 is provided on the light-shielding layer 6 of a plurality of specific pixels. Is formed.

A liquid crystal cell is formed by bonding a TFT substrate 4 and a counter electrode substrate 10 and injecting a liquid crystal 12 into a gap formed between the TFT substrate 4 and the counter electrode substrate 10 by a projection pattern 11. The cell thickness of the liquid crystal cell is maintained by the projection pattern 11.

[0004]

However, in the conventional liquid crystal display device having the above-mentioned structure, the rubbing becomes uneven due to the provision of the projection pattern on the counter electrode substrate, and the projection pattern 11 is formed. Light shielding layer 6
However, when the light-shielding layer 6a has the opening 6d as shown in FIG. 5, the image quality is remarkably inferior, such as light leakage when displaying a screen. In order to shield the light leakage, as shown in FIG. 3, when the light-shielding layer 6b is formed by extending the light-shielding portion 6c in the opening 6d, the openings of all the pixels are reduced, and the screen is displayed as a liquid crystal display device. In this case, sufficient luminance could not be secured.

An object of the present invention is to solve such a conventional problem and to provide a liquid crystal display device having high image quality and high luminance.

[0006]

According to the present invention, there is provided a light-emitting device, comprising: a light-shielding portion extending in an opening of only a light-shielding layer in a pixel provided with a protrusion pattern; The light-shielding layer of the pixel that is not formed has a shape of an opening without an extended light-shielding portion.

According to the present invention, by reducing only the opening of the light-shielding layer having the projection pattern, the uneven portion of the rubbing caused by the provision of the projection pattern is covered with the extended light-shielding portion. It is possible to prevent image quality deterioration due to uneven rubbing. Further, in the light-shielding layer in which the projection pattern is not provided, since no extended light-shielding portion is provided, the brightness is improved as compared with the conventional liquid crystal display device in which the light-shielding layer portions of all the pixels are enlarged. be able to. Thus, it is possible to provide a liquid crystal display device with high image quality and high luminance.

[0008]

According to the first aspect of the present invention, there are provided two substrates which are parallel to each other, and one substrate is provided with a light-shielding layer having an opening for each pixel, and a plurality of specific pixels are provided. In a liquid crystal display device in which a projection pattern is provided on a part of the light shielding layer and a liquid crystal is filled in a gap formed between the projection pattern and the other substrate, the light shielding layer on which the projection pattern is formed is provided. A light-shielding portion extends from the opening of only the layer, and has an opening having a different shape from the opening of the light-shielding layer on which no projection pattern is formed.

Therefore, it is possible to cover the uneven portion of the rubbing caused by the provision of the projection pattern with the light-shielding layer portion, thereby preventing the deterioration of the image quality due to the uneven portion of the rubbing. In addition, since the light-shielding layers of the other pixels are formed in the shape of the openings without the extended light-shielding portions, the brightness is higher than that of the conventional liquid crystal display device in which the light-shielding layers of all the pixels are provided with the extended light-shielding portions. Can be improved.

[0010] The invention described in claim 2 is the same as the claim 1.
In the liquid crystal display device described in the above, the light-shielding layer on which the projection pattern is formed has a light-shielding portion extending in a portion of the opening below the projection pattern in the rubbing direction.

According to this structure, only the uneven portion of the rubbing due to the projection pattern can be covered with the extended light shielding portion. Therefore, the image quality due to the uneven portion of the rubbing caused by the provision of the projection pattern is reduced. Deterioration can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 show a liquid crystal display device according to an embodiment of the present invention. FIG. 1 is an enlarged view of a light-shielding layer, and FIG. 2 is a cross-sectional view of the liquid crystal display device along AA in FIG. is there.

As shown in FIG. 2, a TFT substrate 4 is formed by disposing an array chip 2 and an alignment layer 3 on a glass substrate 1. A light-shielding layer 6, a colored layer 7, a counter electrode 8, and an alignment layer 9 are laminated on the glass substrate 5 in this order.
Is provided, the counter electrode substrate 10 is formed.

The TFT substrate 4 and the counter electrode substrate 10 are bonded together, and the liquid crystal 1 is placed between the TFT substrate 4 and the counter electrode substrate 10.
2 is injected to form a liquid crystal cell. The cell thickness between the two substrates is maintained by the projection pattern 11 of the counter electrode substrate 10.

In the light shielding layer 6 shown in FIG.
In the light-shielding layer 6b of a specific pixel provided with a light-shielding portion 6c, the light-shielding portion 6c extends in an opening 6d below the rubbing direction (the direction of the arrow) of the projection pattern 11 thereof. By providing the extended light-shielding portion 6c, the uneven portion of the rubbing caused by the projection pattern 11 can be covered with the light-shielding layer, so that the image quality of the liquid crystal display device is deteriorated by forming the projection pattern 11. Can be prevented.

The light-shielding layer of the pixel having no projection pattern is formed of the light-shielding layer 6a having no extended light-shielding portion as shown in FIG. 5, so that the opening 6d is large. A panel with higher luminance can be obtained as compared with the conventional one in which the light-shielding layer 6 of the pixel is constituted by the light-shielding layer 6b as shown in FIG.

Next, a specific example of the present invention will be described. Figure 1,
In FIG. 2, the projection pattern 11 is a column having a diameter of 10 μm and a height of 5 μm, and is formed for every three pixels. The pixel pitch is 100 μm × 300 μm in height, and the light-shielding layer 6 a is formed 20 μm inside from the end face of the pixel.

The projection pattern 11 is provided at the center of the light shielding layer on the upper side of the pixel. The light-shielding layer 6b of the pixel on which the projection pattern 11 is provided is only 50 left from the center of the upper side.
μm, the portion on the right side of the center of the upper side is 20 μm, and the other sides are also 20 μm. The rubbing direction of the counter electrode substrate 10 on which the projection pattern 11 is formed is the direction of the arrow in FIG. 1 (from the upper right to the lower left of the pixel).

In the case of this specific example, by making the upper side of the light-shielding portion of the pixel 30 μm larger than usual, it is possible to cover the uneven portion of rubbing. Further, compared with the conventional configuration using the light-shielding layer 6b for all pixels, the aperture ratio could be improved to 50.3% from 47.0% of the conventional configuration.

[0020]

As described above, according to the present invention,
The light-shielding portion is extended to the opening of only the light-shielding layer of the pixel in which the projection pattern is provided, and has a different opening from the light-shielding layer of the other pixels, so that the projection pattern is provided. The uneven portion of the rubbing that occurs can be covered with a light-shielding layer, so that the deterioration of the image quality due to the uneven portion of the rubbing can be prevented, and the light-shielding layer of the other pixels has no extended light-shielding portion. With the shape of the opening, there is an effect that luminance can be improved as compared with a conventional liquid crystal display device.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a light-shielding layer of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid crystal display device taken along line AA in FIG.

FIG. 3 is an enlarged view of a light shielding layer of a conventional liquid crystal display device.

FIG. 4 is a sectional view of the liquid crystal display device taken along line BB in FIG. 3;

FIG. 5 is an enlarged view of a light shielding layer having no extended light shielding portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass substrate 2 Array chip 3, 9 Alignment layer 4 TFT substrate 5 Glass substrate 6, 6a, 6b Light shielding layer 6c Light shielding part 6d Opening 7 Colored layer 8 Counter electrode 10 Counter electrode substrate 11 Projection pattern 12 Liquid crystal

Continued on front page F-term (reference) 2H048 BB01 BB08 2H089 LA09 LA14 LA16 LA19 LA20 NA12 NA24 PA05 PA08 QA05 QA14 QA15 TA09 TA13 2H091 FA35Y FD04 FD16 FD22 GA06 GA08 HA07 5C094 AA10 BA03 BA43 CA19 DA14 EA04 EA04 EA04 EA04 EA04 EA04

Claims (2)

[Claims] A light-shielding layer having an opening is provided for each pixel on one of the substrates;
In a liquid crystal display device, a projection pattern is provided on a part of the light shielding layer of a plurality of specific pixels, and a gap formed between the projection pattern and the other substrate is filled with liquid crystal. A liquid crystal display device, wherein a light-shielding portion extends from the opening of only the light-shielding layer on which the pattern is formed, and has an opening having a shape different from that of the light-shielding layer on which the projection pattern is not formed. 2. The liquid crystal display device according to claim 1, wherein the light-shielding layer on which the projection pattern is formed has a light-shielding portion extending in a portion of the opening below the projection pattern in the rubbing direction.