JPH0915577A - Color liquid crystal display panel - Google Patents

Abstract

(57) [Summary] [Purpose] To block the ambient light including the seal part by simple means. [Structure] The black of the color filter 9 composed of R, G, B and black is present in the entire portion A of the seals 4 and 5 in which the two electrode substrates are overlapped. As a result, it is possible to shield the surrounding light including the seals 4 and 5, and also it is possible to widen the seal formation margin without severely designing the size of the color filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel widely used in OA equipment, AV equipment and the like, and more particularly to a color liquid crystal display panel using a color filter.

[0002]

2. Description of the Related Art FIG. 2 is a sectional view showing a structural example of a color liquid crystal display panel which is widely used in conventional OA equipment, AV equipment and the like.

In FIG. 2, 1 and 10 are front and back surfaces, glass substrates having elliptically polarizing plates 13 and 14 attached to the back side, 2 and 7 are transparent electrodes, and 3 and 6 are provided on the transparent electrodes 2 and 7. An alignment film for orienting liquid crystal molecules, 4 and 5 are seals, 8 is a smooth layer, 9 is a color filter composed of R, G, B, and black, and 11 is provided between the alignment films 3 and 6. A spacer 12 for adjusting the thickness of the liquid crystal is liquid crystal injected into the sealed space surrounded by the seals 4 and 5.

As can be seen from FIG. 2, the color filter 9
The black is formed so as to exist only inside the seals 4 and 5 (hereinafter referred to as seal portions), and the peripheral portion on the glass substrate 10 side is joined to the seals 4 and 5 via the smooth layer 8. Has become.

[0005]

As described above, in the conventional color liquid crystal display panel, since the black color filter 9 is formed so that it exists only inside the seal portion, light leakage from the seal portion does not occur. Therefore, it is necessary to shield light in the mechanical design of the color liquid crystal display module. As a concrete example of countermeasures, attach black tape to the back surface of the color liquid crystal display panel where light escapes, or
Although the surface is covered with a frame, this has a problem that the visible area becomes small.

Also in the design of the color liquid crystal display panel, the size of the color filter is determined so as to be closest to the inner end of the seal portion in order to reduce light leakage as much as possible. If the seals 4 and 5 partially contact with the color filter 9 due to the influence of the linearity of No. 5 and the non-straightness or the misalignment of the positions, there is a problem that a uniform gap cannot be obtained. It was

The present invention solves the conventional problems as described above, shields the peripheral light including the seal portion with a simple structure, and allows a seal formation margin to be provided without severely designing the size of the color filter. The purpose is to spread.

[0008]

In order to achieve the above-mentioned object, the present invention has a color filter composed of R, G, B, and black on at least one of two facing electrode substrates. In the portion where the electrode substrate is adhered by a seal via a spacer, the black of the color filter is formed on the entire seal portion where the two electrode substrates overlap.

[0009]

According to the present invention, since the black of the color filter is formed on the entire sealing portion where the two electrode substrates are overlapped with each other, light leakage does not occur from the peripheral portion including the sealing portion. Since it is not necessary to shield the peripheral portion from light and it is not affected by variations in color filter thickness and dimensional design, the seal formation margin can be expanded and the conventional viewing area is not narrowed.

[0010]

1 is a sectional view showing the structure of a color liquid crystal display panel according to an embodiment of the present invention. In FIG.
The same numbers are given to the same components shown in FIG. 2 of the conventional example, and the description thereof is omitted.

In this embodiment, as shown in FIG.
R, G, and
B has a color filter 9 composed of black,
The black color of the color filter 9 is 2
The glass substrates 1 and 10 are formed on the entire portion A of the seal portion which is overlapped with the seals 4 and 5 and the smoothing layer 8 so that the surrounding light can be shielded and no light leakage occurs. There is.

Here, the color filter 9 is made of R, G, B and black as shown in FIG. 1, and the black of the color filter 9 is made of chrome and R,
G, B stripes superimposed, black pigment, R, G, B stripes, R, G, B
Among them, it is possible to implement a pseudo color by superimposing double colors.

Next, the manufacturing process of the color liquid crystal display panel of FIG. 1 will be briefly described. As shown in FIG. 1, a glass substrate having a color filter 9 formed in a portion A where two electrode substrates are overlapped with each other. 10, a smoothing resin for smoothing the surface is applied to form a smoothing layer 8, and a substrate on which a predetermined pattern is formed with a transparent electrode 7;
Alignment films 3 and 6 are formed on each of the glass substrates 1 on which a predetermined pattern is formed by the transparent electrode 2, and an alignment treatment is performed. Next, the two electrode substrates are bonded with the seals 4 and 5 via the spacer 11 and the liquid crystal 12 is sealed inside to produce a color liquid crystal display panel.

Thereafter, the table of the color liquid crystal display panel,
When a predetermined elliptically polarizing plate 13 and 14 was attached to the back side and a drive circuit was connected to the liquid crystal display module, it was confirmed that there was no light leakage.

[0015]

As described above, according to the present invention, the color filter is formed on the entire sealing portion where the two electrode substrates are overlapped with each other, so that the peripheral light including the sealing portion is shielded and the color The dimensional design of the filter does not become severe, and the seal formation margin can be widened so that the viewing area is not narrowed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a structure of a color liquid crystal display panel according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a structural example of a conventional color liquid crystal display panel.

[Explanation of symbols]

1, 10 ... Glass substrate, 2, 7 ... Transparent electrode, 3, 6 ...
Alignment film, 4, 5 ... Seal, 8 ... Smoothing layer, 9 ... Color filter, 11 ... Spacer, 12 ... Liquid crystal, 13, 14
… Elliptical polarizer.

Claims (5)

[Claims] 1. A color filter composed of R, G, B, and black is provided on at least one of two opposing electrode substrates, and the two electrode substrates are adhered by a seal through a spacer. The color liquid crystal display panel, wherein the color filter black is formed on the entire seal portion where the two electrode substrates are overlapped with each other. 2. The color liquid crystal display panel according to claim 1, wherein the black color of the color filter is a combination of chrome and R, G, B stripes. 3. The color liquid crystal display panel according to claim 1, wherein black of the color filter is a black pigment. 4. The black of the color filter,
The color liquid crystal display panel according to claim 1, wherein the color liquid crystal display panel has R, G, and B stripes. 5. The black of the color filter,
The color liquid crystal display panel according to claim 1, wherein two colors of R, G, and B are superposed to form a pseudo black.