JPS6366501A - Manufacturing method of color filter for liquid crystal display - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a color filter for a liquid crystal display used in a color liquid crystal display device in which a color filter and a liquid crystal are combined.

Conventional technology Color filters for liquid crystal displays have traditionally been made by coating a dyeable photosensitive resin on a transparent substrate and exposing it to light using a photomask designed in advance to pass light from the pixel area. After forming the film, it is dyed with a dye dispersion, etc.
It formed R, G, and B pixels. Also, methods have been used in which R, G, and B pixels are directly formed on a transparent substrate by printing or other means.

Problems that the invention aims to solveAccording to methods such as dyeing, it is difficult to dye the black matrix part created between pixels black with negative colors, and it is difficult to dye black with a negative color. This can lead to uneven dyeing.

Furthermore, according to the printing method, there is no reproducibility with thin lines of about 20 to 3011 m, resulting in thick and thin parts. In addition, blurring occurs where the matrices intersect, and if the area of the pixel is small, it may become blurred.

The only way to solve the problem is to form a matrix with a photosensitive resin on a transparent substrate, apply a black layer on top of it by a printing method to form a black matrix, and then apply a protective film on the black matrix using photosensitive silicone. A pixel portion is formed in the gap between the IJ and IJ.

Function: By forming the portion that will become the black matrix with photosensitive resin, a highly accurate matrix can be formed. By providing a black portion on the matrix by a printing method, a black matrix with a high degree of blackness can be easily formed.

By providing a protective film layer using photosensitive silicone on the black matrix, a color filter with high contrast can be produced with clear boundaries 9 between the black matrix and the pixel portions provided in the gaps.

EXAMPLE An example of the present invention will be described below. As shown in FIG. 1A, first, a negative type photosensitive resin 2 (gelatin, M ammonium chromate) is applied onto a transparent substrate 1 by a method such as a spin cord. Next, as shown in B, exposure is performed using Tomask 3, a system designed in advance so that light does not hit the area where pixels are to be formed, but only the area where the black matrix is to be formed. .

When development is performed as shown in C, a resin matrix 4 is formed only in the area where the black matrix is to be formed. As shown in D, a black portion 5 is provided on the upper part of the matrix by a printing method using a coloring material containing carbon.

As the coloring material for forming the black part, ink or synthetic resin containing black iron oxide, ink containing carbon black, synthetic resin, or natural resin is used.

Coloring materials containing carbon black have a very high degree of blackness and are desirable as a black matrix.

Next, as shown in Figure 2E, the entire surface is covered with photosensitive silicone resin 6.
Coating. Further, as shown in F, exposure is performed using a photomask 7 designed so that light hits only the vicinity of the black matrix portion.

Then, by developing as shown in G, the black matrix portion can be covered with a protective film 8 of silicone resin.

Thereafter, pixels of each color of RGB are directly provided in the pixel portion by, for example, a printing method. Each pixel is not covered by the black matrix due to the silicone protective film.

A liquid crystal 9 is held between transparent substrates 1 and 1'. A color filter 1o and a common electrode 11 formed of a transparent electrode film are laminated in this order on the upper transparent substrate 1.

A thin film field effect transistor (
A pixel electrode formed of a transparent conductive film (hereinafter abbreviated as TPT) and a transparent conductive film driven by this TPT! 2 is carried. Polarizing plates 13 and 13' are arranged so that their celestial polarization axes are parallel to each other. Alignment films 14 and 14'
The orientation of liquid crystal molecules is controlled by J9JJ.

As described above, when the liquid crystal panel is configured as +4, and the white color is driven from below and the voltage applied to the liquid crystal layer is changed, the amount of light passing through the liquid crystal layer changes accordingly, and a color image is reproduced.

Effects of the Invention According to the present invention, after forming a matrix using a photosensitive resin, a black part is provided using a coloring material containing carbon by a printing method, and the surface is further covered with a silicone resin, thereby eliminating bleeding of each pixel. It is possible to produce a color filter with a black matrix that is clear, has high precision, and has a high degree of blackness without causing any blackness.

1 and 2 show the liquid crystal display device of the present invention...
...Transparent substrate, 2...Photosensitive resin, 3...
・Photomask, 4...Matrix, 6...
・Black area, 6 Figure 1 H2

Claims (2)

[Claims] (1) A process of forming a matrix with a photosensitive resin on a transparent substrate, forming a black part on the top by a printing method to form a black matrix, and layering a protective film on the black matrix using photosensitive silicone. 1. A method for manufacturing a color filter for a liquid crystal display, comprising the steps of: providing a black matrix, and forming a pixel portion in a gap between the black matrices. (2) The method for producing a color filter for a liquid crystal display according to claim 1, wherein the black portion contains carbon.