JPH0713160A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide a liquid crystal display device performing accurate color display without mixing the colors of adjacent color picture elements. CONSTITUTION:A color filter 1 is constituted of a green(G) color filter 2, a blue(B) color filter 3, a red(R) color filter 4 and a luminance(I) color filter 5; and each of the color filters 2 to 5 is formed as a regular triangle. As for the arrangement of the color filters 2 to 5 forming one multicolor display element, the respective color picture elements which are also formed as the regular triangle by bringing one side of each of the color filters 2 to 4 into contact with each side of the color filter 5 are concentratively arranged in comparison with the conventional rectangular one, and interference between the multicolor display picture elements is reduced, so that cross color disturbance is prevented from occurring.

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 device,
In particular, the present invention relates to a liquid crystal display device including a color filter that performs multicolor display.

BACKGROUND OF THE INVENTION In recent years, information processing apparatuses represented by, for example, word processors (hereinafter simply referred to as word processors) and personal computers (hereinafter simply referred to as personal computers) are becoming more sophisticated and smaller in size. A lightweight and thin display part is also desired, and a cathode ray tube (hereinafter, CRT: Cathode Ray) which has been commonly used as a display device in recent years has been desired.
Liquid crystal display devices are often used instead of (Tube).

As a form of the liquid crystal display device, a backlight type LCD (Li
quid Crystal Display) and a reflective LCD that reflects external light as a light source, and as a color display system in a backlight LCD, there are a color filter type and a color light source type. In particular, in the case of a color filter type of a backlight type LCD, a liquid crystal optical shutter and an RGB micro color filter can be combined to realize full-color display or full-scale multi-color display, which is structurally thin and lightweight. Therefore, it tends to be frequently used for morphological OA devices such as notebook computers.

[0004]

2. Description of the Related Art Conventionally, in a color filter type liquid crystal display device, the color filters used are classified according to the pattern arrangement of R, G and B pixels. The mosaic type shown in FIG. 4 and the triangle shown in FIG. Type, 4-pixel arrangement type shown in FIG. 6, stripe type shown in FIG. These pattern arrangements are properly used according to the purpose of use. For example, when the triangle type pattern arrangement is used, there is an advantage that the apparent resolution can be increased.

Further, when the color filters are arranged in a triangle type with a finer pitch, the effect of increasing apparent resolution is lessened, and in the case of another mosaic type, stripe type or 4-pixel arrangement type arrangement pattern. The difference from the resolution will be less.

[0006]

However, in such a conventional color filter type liquid crystal display device, there are a mosaic type, a triangle type, a stripe type, and a 4 type as an arrangement pattern of each color pixel of a color filter to be used. Although there is a pixel arrangement type or the like, since the shape of the color pixels is rectangular in each arrangement pattern, there is a problem that pixels cannot be arranged in a concentrated manner.

That is, in the conventional color filter, since the shape of the color pixel is rectangular, the concentration between the color pixel filters is insufficient regardless of the type of each arrangement pattern.
There has been a problem that the color display quality of the liquid crystal display device is deteriorated by causing cross color interference and the like.

[Object] In view of the above problems, it is an object of the present invention to provide a liquid crystal display device that performs accurate color display without the colors of adjacent color pixels being mixed.

[0009]

The invention according to claim 1 is
In a liquid crystal display device having a color filter for arranging red, green, and blue color pixels and luminance pixels in a predetermined shape to form one multicolor display pixel, the shape of each color pixel and luminance pixel of the color filter is an equilateral triangle. The above-mentioned object is achieved by forming the above.

In this case, the above-mentioned object is, for example, claim 2
As described in, the luminance pixels formed in the equilateral triangle are arranged such that one side of each color pixel formed in the equilateral triangle is in contact with each side, and the arrangement shape is made into an equilateral triangle, and the one multicolor display pixel is formed. Is effective.

[0011]

According to the invention of claim 1, the shape of each color pixel and the luminance pixel of the color filter is formed into an equilateral triangle, and according to the invention of claim 2, the luminance pixel formed into the equilateral triangle. Are arranged so that one side of each color pixel formed in the equilateral triangle is in contact with each side of the regular triangle, and this multi-color display pixel is formed by making the array shape into a regular triangle, so that the concentration between each color pixel and the luminance pixel is concentrated. Improve the degree.

Therefore, the occurrence of cross color interference is suppressed, and the color display quality of the liquid crystal display device is improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.
Will be described with reference to.

First, the configuration of this embodiment will be described.

FIG. 1 is an enlarged view of a color filter used in the backlight type liquid crystal display device of this embodiment. In FIG. 1, the color filter 1 is green (G).
The color filter 2, the blue (B) color filter 3, the red (R) color filter 4, and the luminance (I) color filter 5 are formed. Each of the color filters 2 to 5 is formed into an equilateral triangle and one In the arrangement of the color filters 2 to 5 forming the multi-color display pixel, one side of each color filter 2 to 4 is in contact with each side of the luminance color filter 5 to form an equilateral triangle.

FIG. 2 is a diagram showing an example of the manufacturing process when the color filter 1 of this embodiment is manufactured by the pigment dispersion method.

First, in FIG. 2A, the glass substrate 1
A photosensitive green colored resin material 12 is spin-coated on the surface of the substrate 1 to a predetermined thickness, and prebaked at a predetermined heating temperature for a predetermined time in an oven. In this case, as the photosensitive green colored resin material 12, a solution in which a green material is dispersed in a synthetic substrate such as polyimide is applied on the glass substrate 11.

Next, referring to FIG. 2B, a desired portion 12 of the photosensitive green colored resin material 12 is inserted through a photomask 13.
A is exposed to UV (ultraviolet) having a predetermined energy density.
By this exposure, the desired portion 12a is photo-cured and becomes insoluble in the developing solution.

Next, in FIG. 2C, the exposed glass substrate 11 is immersed in a dedicated developing solution for a predetermined time, and then the unexposed portion is dissolved and removed by using ultrasonic waves or the like, and a rinse treatment is performed. Further, post baking is performed in an oven at a predetermined heating temperature for a predetermined time to obtain a green pattern 12a.

By repeating the same processing steps, blue 1
Patterns of 3, red 14 and transparent 15 are sequentially formed as shown in FIG. 2D to form the color filter 1 of 4 colors. The light-sensitive colored resin material for each color has a light transmittance adjusted to match the spectral characteristics of each color.

An example of the chromaticity displayed by using the color filter 1 is shown in FIG.

In the chromaticity diagram of FIG. 3, three (b)
The points are luminance color filter 5 and other color filter 2
4 shows the chromaticity when white and other colors are simultaneously turned on in the case of using ~ 4. Further, three points (c) are chromaticities when the luminance color filter 5 is a gray filter, and the gray color filter and other color color filters 2 to 4
Shows the chromaticity when gray and other colors are turned on at the same time.

As described above, in this embodiment, each of the color filters 2 to 5 is formed into an equilateral triangle, and
Color filters 2 to 5 forming one multicolor display pixel
Since the arrangement of is also an equilateral triangle, each color pixel can be arranged more concentratedly than the conventional rectangular one, and the interference between multi-color display pixels can be reduced, so that the occurrence of cross-color interference is suppressed. be able to.

Therefore, the color display quality of the liquid crystal display device can be improved. Further, in the color filter of this embodiment, as shown in FIG.
5 to 5 are formed in an equilateral triangle, and the arrangement of each color filter 2 to 5 forming one multicolor display pixel is also an equilateral triangle, so that the luminance color filter 5 includes other green, blue, and red color filters 2 to 5. The side that contacts 4 is evenly formed,
When the luminance color filter 5 simultaneously lights other green, blue, and red color filters 2 to 4, gradation adjustment becomes easy, and multicolor display with more natural gradation can be realized.

As a result, even in the ferroelectric liquid crystal panel, in which the conventional color filter having rectangular rectangular color pixels was capable of expressing only about 2 to 8 colors, the color filter 1 in which the color pixels of this embodiment are concentrated is provided. By using 1
It is possible to easily perform multicolor display such as 6 colors.

Although the invention made by the present inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, although the color filter is formed by the pigment dispersion method in the above embodiment, the organic filter may be a dyeing method, a printing method, an electrodeposition method, or the like. It may be formed by an inorganic filter using an inorganic material or a composite filter formed by a combination of these.

[0028]

According to the invention of claim 1, the shape of each color pixel and the luminance pixel of the color filter is formed into an equilateral triangle, and according to the invention of claim 2, it is formed into the equilateral triangle. Since each side of the luminance pixel is arranged so that one side of each color pixel formed in the equilateral triangle is in contact, and the arrangement shape is made into an equilateral triangle to form the one multicolor display pixel, between each color pixel and the luminance pixel. Improve the degree of concentration.

Therefore, the occurrence of cross color interference can be suppressed, and the color display quality of the liquid crystal display device can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged view of a color filter used in a liquid crystal display device of this embodiment.

FIG. 2 is a diagram showing a manufacturing process of the color filter of FIG.

FIG. 3 is a chromaticity diagram of colors displayed by the liquid crystal display device of the present embodiment.

FIG. 4 is a diagram of a conventional color filter in which R, G, and B pixels are arranged in a mosaic pattern.

FIG. 5 is a diagram of a color filter in which conventional R, G, and B pixels are arranged in a triangle pattern.

FIG. 6 is a diagram of a conventional color filter in which R, G, and B pixels are pattern-arranged in a 4-pixel arrangement type.

FIG. 7 is a diagram of a color filter in which conventional R, G, and B pixels are arranged in a stripe pattern.

[Explanation of symbols]

 1 Color Filter 2 Green (G) Color Filter 3 Blue (B) Color Filter 4 Red (R) Color Filter 5 Luminance (I) Color Filter 11 Glass Substrate 12 Photosensitive Green Colored Resin Material 13 Blue Pattern 14 Red Pattern 15 Transparent Pattern

Claims (2)

[Claims] 1. A liquid crystal display device comprising a color filter for arranging red, green and blue color pixels and luminance pixels in a predetermined shape to form one multicolor display pixel, wherein each color pixel and luminance pixel of the color filter A liquid crystal display device having a shape of a regular triangle. 2. A luminance pixel formed in the equilateral triangle is arranged such that one side of each color pixel formed in the equilateral triangle is in contact with each side, and the arrangement shape is made into an equilateral triangle, and the one multicolor display pixel is formed. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed.