JPH04212929A - Color liquid crystal display element - Google Patents

Abstract

PURPOSE:To provide a color liquid crystal display element not receiving an influence of pin holes or the like with a space always fixed between transparent electrodes, relating to the color liquid crystal display element for changing display color by lighting and not lighting a picture element divided into a plurality of primary colors. CONSTITUTION:In the case of a color display element which has a plurality of picture elements in a crossing point of transparent electrodes, arranged as mutually orthogonal through a liquid crystal, to change display color by lighting each picture element divided into a plurality of primary colors, a panel for a color liquid crystal display element is constituted by providing the third transparent substrate 6 on a color filter layer 26, formed on the second glass substrate 21, and forming a transparent electrode 23 on the third substrate 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display element which has a plurality of pixels classified into a plurality of basic colors and which changes the display color by turning each pixel on or off.

[0002] In recent years, there has been an increasing demand for various flat display elements that are effective in saving space and saving power as display elements incorporated in terminal devices of computer systems. Initially, most of these flat display devices displayed a single color, but as the amount of displayed information increases, there is a growing demand for higher pixel definition and color display. However, in color liquid crystal display elements, which are generally used as flat display elements, the characteristics of each pixel tend to vary.
CR such as the density differing for each color and the occurrence of shading even in the same color
It lacks stability when compared to T display elements. Therefore, various measures have been taken to stabilize the characteristics of each pixel and make the level of displayed colors constant.

0003

2. Description of the Related Art FIG. 3 is a side sectional view showing the structure of a conventional color liquid crystal display element, and FIG. 4 is a schematic diagram showing the main part of the display surface of the color liquid crystal display element.

In FIG. 3, a conventional color liquid crystal display element has a panel 1 and a panel 2 with electrode forming surfaces facing each other, and a peripheral seal 3 that seals around the space interposed between the panels 1 and 2. The space surrounded by the panels 1 and 2 and the outer seal 3 is filled with liquid crystal 4. The panel 1 is composed of a first glass substrate 11, a polarizing plate 12, and a transparent electrode 13, and the plurality of transparent electrodes 13 are covered with an alignment film 14 made of polyimide resin formed thereon.

The panel 2 also includes a second glass substrate 21, a polarizing plate 22 attached to the outside thereof, and a glass substrate 21.
A black mask 25 made of a metal film such as chromium (Cr) formed on the inside of the black mask 25 and a color filter layer 2 made of colored resin or the like formed in the opening of the black mask 25.
6, a top coat layer 27 made of a transparent resin that eliminates unevenness created by the color filter layer 26, and a plurality of transparent electrodes 23 formed on the top coat layer 27 so as to be perpendicular to the transparent electrodes 13. The transparent electrode 23 is covered with an alignment film 24 made of polyimide resin formed thereon.

The plurality of color filter layers 26 and transparent electrodes 23 correspond to the three primary colors of red (R), green (G), and blue (B),
The black mask 25 has openings at the intersections of the transparent electrodes 13 and 23, as shown in FIG. Therefore, in the opening of the black mask 25 where the transparent electrode 13 and the transparent electrode 23 intersect, a plurality of pixels 5 divided into the three primary colors of B, G, and R are formed in a predetermined order. The display color of the color liquid crystal display element can be arbitrarily changed by turning on or off.

[0007]

[Problems to be Solved by the Invention] However, in conventional color liquid crystal display elements, one transparent electrode is formed on the top coat layer, and as shown in FIG. If the surface is not sufficiently flattened, the distance between the transparent electrodes will vary depending on the location, resulting in a difference in the thickness of the liquid crystal portion, causing color unevenness and differences in brightness. Furthermore, if there is a pinhole in the top coat layer, there is a problem in that the transparent electrode and the black mask are short-circuited through the pinhole, and the applied voltage drops and all the pixels related to the corresponding transparent electrode stop lighting up.

An object of the present invention is to provide a color liquid crystal display element in which the interval between transparent electrodes is always constant and is not affected by pinholes or the like.

[0009]

Means for Solving the Problems FIG. 1 is a side sectional view showing a color liquid crystal display element according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem involves a plurality of pixels at the intersections of transparent electrodes arranged perpendicularly to each other through a liquid crystal, and the display color can be changed by lighting or non-lighting of each pixel divided into a plurality of basic colors. In a color display element that changes the second
A transparent third substrate 6 is provided on a color filter layer 26 formed on a glass substrate 21, and a transparent electrode 23 is formed on the third substrate 6. Ru.

[0011]

[Operation] In FIG. 1, by providing a transparent third substrate on the color filter layer and forming transparent electrodes on the third substrate, even if unevenness is caused by the color filter layer, the distance between the transparent electrodes can be improved. will never change. Further, the third substrate completely blocks the connection between the transparent electrode and the black mask, so that no short circuit occurs. That is, it is possible to realize a color liquid crystal display element in which the interval between transparent electrodes is always constant and is not affected by pinholes or the like.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. Note that FIG. 2 is a side sectional view showing another embodiment of the present invention.

In FIG. 1, the color liquid crystal display element of the present invention has a panel 1 and a panel 2 with electrode forming surfaces facing each other.
and a peripheral seal 3 that seals around the space interposed between the panels 1 and 2, and the space surrounded by the panels 1 and 2 and the peripheral seal 3 is filled with liquid crystal 4. ing. The panel 1 is composed of a first glass substrate 11, a polarizing plate 12, and a transparent electrode 13, and the plurality of transparent electrodes 13 are covered with an alignment film 14 made of polyimide resin formed thereon.

The panel 2 includes a second glass substrate 21 and a transparent third substrate 6 facing each other with a space in between. A black mask 25 is formed in the opening of the black mask 25, and a color filter layer 26 made of colored resin or the like is formed in the opening of the black mask 25.

On the other hand, a plurality of transparent electrodes 23 are formed on the third substrate 6 so as to be perpendicular to the transparent electrodes 13.
The transparent electrode 23 is covered with an alignment film 24 made of polyimide resin formed thereon. The peripheral edge of the third substrate 6 is connected to the second glass substrate 2 via the spacer 7.
It is attached to 1.

In another embodiment of the present invention shown in FIG. 2, the panel 2 includes a second glass substrate 21 and a transparent third substrate 6, and a polarizing plate 22 is pasted on the outside of the second glass substrate 21. A black mask 25 is formed inside the glass substrate 21, and a color filter layer 26 made of colored resin or the like is formed in the opening of the black mask 25. Note that the unevenness caused by the color filter layer 26 is caused by the top coat layer 27.
flattened by

On the other hand, a plurality of transparent electrodes 23 are formed on the third substrate 6 so as to be perpendicular to the transparent electrodes 13.
The transparent electrode 23 is covered with an alignment film 24 made of polyimide resin formed thereon. The peripheral edge of the third substrate 6 facing the second glass substrate 21 with the top coat layer 27 in between is covered with spacers 7 as in the previous embodiment.
It is attached to the second glass substrate 21 via.

By providing the transparent third substrate on the color filter layer and forming the transparent electrodes on the third substrate in this way, even if unevenness is caused by the color filter layer, for example, the interval between the transparent electrodes can be adjusted. will never change. Further, the third substrate completely blocks the connection between the transparent electrode and the black mask, so that no short circuit occurs. That is, it is possible to realize a color liquid crystal display element in which the interval between transparent electrodes is always constant and is not affected by pinholes or the like.

[0019]

As described above, according to the present invention, it is possible to provide a color liquid crystal display element in which the interval between transparent electrodes is always constant and is not affected by pinholes or the like.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a color liquid crystal display element according to the present invention.

FIG. 2 is a side sectional view showing another embodiment of the present invention.

FIG. 3 is a side sectional view showing the structure of a conventional color liquid crystal display element.

FIG. 4 is a schematic diagram showing the main parts of the display surface of a color liquid crystal display element.

[Explanation of symbols]

1, 2 Panel ３　　　　　　　Outer seal ４　　　　　LCD 6 Third board 7 Spacer 11, 21 Glass substrate 12, 22 Polarizing plate 13, 23 Transparent electrode 14, 24 Alignment film 25 Black Mass 26 Color filter layer 27 Top coat layer

Claims (3)

[Claims] Claim 1: A plurality of pixels are provided at the intersections of transparent electrodes arranged perpendicularly to each other via a liquid crystal, and the display color is changed by lighting and non-lighting of each pixel divided into a plurality of basic colors. In the color display element to be changed, a color filter layer (26) formed on a second glass substrate (21)
A transparent third substrate (6) is provided on top of the transparent electrode (2).
3) is formed on the third substrate (6). 2. A third substrate (6) is attached to a second glass substrate (21) having a color filter layer (26) via a spacer (7), and the second glass substrate (21)
2. The color liquid crystal display element according to claim 1, wherein a space is interposed between the third substrate (6) and the third substrate (6). 3. A transparent top coat layer (27) is formed on the color filter layer (26) formed on the second glass substrate (21), and a third layer is formed on the top coat layer (27). A color liquid crystal display element according to claim 1, further comprising a substrate (6).