JPH0462504A - Manufacture of color filter - Google Patents

Abstract

PURPOSE:To flatten the color filter and BS formation at the same time by performing solid black printing on three colors R, G, and B after their printing, and grinding and polishing the surface. CONSTITUTION:After the printing of the three colors on a glass substrate 5, the set-solid printing 4 is carried out thereupon by screen printing or offset printing, and rotary polishing is carried out by a polishing machine by using abrasive cloth and abrasive grains after drying to grind and polish excessive black ink other than ink in recesses between the colors and the surfaces of the R, G, and B ink layers. Even if the respective colors R, G, and B are irregular in width to have a gap, BS fill the gap, so a light leak is prevented and a color difference at the BS part, specially, a BS color tone defect at a mixed color part of R and G is eliminated; and the top surface is ground and polished to obtain a flat picture element surface, thereby improving the picture quality.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to forming a colored film on a substrate such as glass by a printing method to produce a color filter for electro-optical display devices of liquid crystal displays and other precision electronic devices. Relating to a manufacturing method.

[Conventional technology]

R, G used for manufacturing liquid crystal displays, panels, etc.
, B color ink film in a predetermined pattern, as shown in FIG.
It is common practice to form a BS by overlapping the colors by μm and mixing the colors, or by printing three colors and then printing black between the colors (as shown in Figure 6). It was a BS formation method.

[Problem to be solved by the invention]

In the above conventional method, light leakage due to gaps due to non-uniform overlapping of the three primary colors, BS color difference or between the three colors due to differences in the overlapping colors, I]S width, non-uniformity due to positional deviation during BS printing,
Or due to misalignment. Non-uniformity among R, G, B pixels,
Due to BS printing, there was a problem in that the surface flatness was impaired. Therefore, the present invention is intended to solve such problems, and its purpose is to form a BS at the same time as flattening a color filter.

[Means to solve the problem]

In the present invention, when forming a color filter in a predetermined pattern on a substrate with colored ink by a printing method, the method shown in FIG. 1 (α
) As shown in Figure 1(b), after printing the three colors R, G, and B, solid black printing is applied on top of it, and the surface is ground and polished to form a color filter. It is characterized by flattening and forming BS at the same time.

In the present invention, in order to solve the above problems, J) After printing the three colors R, G, and B, solid printing of black is performed on it by screen printing or offset printing, and after drying, with a sanding machine, By performing rotary polishing using an abrasive cloth and an abrasive agent, as shown in Figure 1Cb), the excess black ink other than the black ink in the valleys between each color and the R, G, and B ink layers are removed. The surface is ground and polished to make it flat and at the same time BS formation is performed.

In the present invention, the surface was ground and polished using a rotary polishing machine in order to flatten it and form a BS, but as long as it can be evenly polished, cutting with a diamond or the like or a method of flattening may also be used. Needless to say.

[Example] (Example 1) Glass of 300X600XO, i%t was cleaned and offset printing was performed. The printing conditions are as follows. The printing machine used was a 600OL manufactured by Kouyousha, and the plate was made using Toshi's Mizunashi lithographic plate (negative type). The pattern is
240XO, 15% pixel size arranged in stripes was used. R, G, and E were printed with a thickness of 2 to 6 μm each using Toyo Ink's waterless lithographic ink and dried. Next, Toyo Ink's waterless lithographic black ink was applied on top of it as shown in Figure 1 (α) (2μ
Peta printing was performed on the entire surface to a thickness of m and was dried.

Next, using a polishing machine manufactured by Enuchi, TLCD-800F-5, and polishing cloth, Surfing #000 manufactured by Fujimi Kenmo KK,
Using abrasive, Polyplastic #105, pressure, 0.25
m, rotation speed, 6 Orpm.

Polishing time: Grind and polish the printed ink surface in 5 minutes.
fl, Tokyo Electron Tribe, at α Step-200,
As a result of measuring the surface of the ink film, a color filter was obtained, as shown in FIG. 1Cb) (the surface was flat and BS was formed in the valleys between each color).

(Example 2) Cleaned glass of 500 x 500 x O, 1% t was subjected to offset printing. The printing conditions are as follows. The printing machine used was a 6000L manufactured by Kouyousha, and the plate was made using a Toshishi waterless lithographic plate (negative type).

The ink used is Toyo Ink's waterless lithographic ink, =
R, G, and B were each printed to a thickness of 2 to 2.5 μm and dried. Then, as shown in FIG. 1(a), peta printing was carried out on the entire surface using Toyo Ink's waterless lithographic black ink to a thickness of 2 μm and allowed to dry. Next, using Speed, Ham Co., Ltd.'s high-speed flat lap stone, rNG48SPAW polishing machine, Fujimi Abrasives KK's abrasive cloth Surfing #026, Tohoku Metal Chemical KX's abrasive, for optical lens polishing, cerium oxide, After grinding and polishing the printed ink surface with a pressure of 02, a rotation speed of 52 rpm, and a polishing time of 5 minutes, the ink film was polished using an α step-200 manufactured by Tokyo Electron. As a result of measuring the surface, a color filter was obtained, as shown in FIG. 1(b), with a flat surface and BS formed in the valleys between each color.

(Example 5) A glass of 5.00×500×0.1%t was washed and subjected to offset printing. The printing conditions are as follows.

The printing machine used was Kouyousha 600OL, and the plate was made using a waterless lithographic plate (negative type). The pattern is o
, 2%xo, and 2'X pixel sizes arranged in a mosaic pattern were used.

The ink is made by Toyo Ink and uses waterless planographic ink.
R, G, and B were each printed to a thickness of 2 to 25 μm and dried. Next is Yoshitani Shokai screen printing machine Mighty■
As shown in Figure 1 (α) (full screen, solid printing was performed. The plate was made by Murakami Screen, SS, $325 mesh, and the printing thickness was 10 μm. The ink was made by Okuno Pharmaceutical Co., Ltd., Black, BL-0 was used. After drying, Speed, made by Ham, High Speed Flat Up Iwa, JN048S
Using a PAW polisher, use Fujimi Ken 1IKK, abrasive cloth, Surfing #026, and Tohoku Metal Chemical KK, abrasive, cerium oxide for optical lens polishing, -6, at a pressure of 0.
．． After grinding and polishing the ink surface printed at 2J rotation speed, 52 rotations, and 15 minutes of polishing time, the ink film surface was measured using α Step-200 manufactured by Tokyo Electron, as shown in Figure 1 (b). As shown in the figure, a color filter with a flat surface and BS formed in the valleys between each color was obtained.

〔Effect of the invention〕

As described in detail above, according to the present invention, even if the widths of the R, G, and B colors are uneven and there is a gap, the BS fills the gap, so light leakage can be prevented, and the R, G, and B It can solve the color difference in the BS area due to color mixture, especially the BS color tone defect in the R and G color mixture area, and by grinding the top surface, a flat pixel surface can be obtained and the image quality can be improved. It is possible to manufacture and provide color filters with good quality without cells, gaps or unevenness during assembly.

[Brief explanation of drawings]

FIG. 1(cL) is a diagram showing R, G, B, and black solid printing for BS according to the present invention. 1 ・・・・・・・・・ R 2・・・・・・・・・ G 5 ・・・・・・・・・ B 4・・・・・・・・・Bs peta printing 5... . . . Glass substrate FIG. 1(b) is a diagram showing R, G, and B according to the present invention and BS formed between each color. 1 ・・・・・・・・・ R 2・・・・・・ ・・・ G 3 ・・・・・・ ・・・ B 4 ・・・・・・−・・・ BS 5・・・・・・...Glass substrate FIG. 2 is a diagram showing a conventional condensed BS by overlapping each color. 1 ・・・・・・ ・・・ R 2 ・・・・・・ ・・・ G 6 ・・・・・・ ・ B 4 ・・・・・・・・・ Condensation BS5 due to duplication ...
...Glass substrate FIG. 5 is a diagram showing a BS by conventional printing. 1 ・・・・・・・・・ R 2・・・・・・ ・・・ G 5 ・・・・・・ ・・・ B 4 ・・・・・・ BS 5・・・・・・・...Glass substrate or above Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki (1 other person) ¥11 page (δ) 11 yen (17) 21st Rikisen 31”3

Claims (1)

[Claims] When forming a color filter in a predetermined pattern with colored ink on a substrate using the printing method, after printing R, G, and B, a solid black print is applied on top of it, and the surface is made flat by grinding and polishing. It is characterized by forming BS and BS at the same time.
Color filter manufacturing method.