Color liquid crystal display device composed of color filter with a layer of three primary color array patterns fabricated by thermal dye transfer technology

• US 5,633,739 A
• Filed: 10/30/1995
• Issued: 05/27/1997
• Est. Priority Date: 11/07/1994
• Status: Expired due to Term

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi, Ltd.
• Inventors: Matsuyama, Shigeru, Asuma, Hiroaki
• Primary Examiner(s): Gross, Anita Pellman
• Assistant Examiner(s): TON, MINH TOAN T
• Application Number:
  US08/550,081
• Time in Patent Office: 575 Days
• Field of Search: 359/68, 359/67, 359/74, 359/79, 430/7, 430/20
• US Class Current: 349/106
• CPC Class Codes: B41M 5/265 for the production of optical filters or electrical components
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133519 Overcoatings

Abstract

A color liquid crystal display device comprising a color filter having a structure including a black matrix BM formed on a transparent substrate, a colored layer FIL colored into at least three primary colors and formed by thermal dye transfer technology, a protective area for protecting against dye diffusion filling the gaps between the colored patterns, a transparent protective overcoat PSV2 formed on the colored layer and a transparent conductive electrode ITO2 formed on the transparent protective overcoat. The protective area against dye diffusion is constituted of a not-colored part FIL(T) of a dye receiving layer, protective overcoats PSV2 and PSV3, or of a black matrix with a high heat resistance. Moreover, the protective film is made from a metal-containing organic silicon compound that can be hardened by light or heat.

Claims

1. A color liquid crystal display having a color filter substrate, comprising:

a black matrix deposited over a substrate;

a layer of three primary color patterns colored by thermal dye transfer technology;

a dye prevention area filling gaps between the color patterns; and

a transparent protective film formed over the color pattern layer and the dye prevention area;

wherein the protective film is a metal-containing organic silicon compound that can be hardened by light and heat.

2. The color liquid crystal display according to claim 1, wherein said black matrix is formed of a metal film.

3. The color liquid crystal display according to claim 1, wherein said black matrix is formed of a material with low light transmittivity.

4. The color liquid crystal display according to claim 1, wherein the three primary color patterns are provided in a transparent dye receiving layer, a remaining portion of the transparent dye receiving layer, not containing the three primary color patterns, filling the dye prevention area filling gaps between the color patterns.

5. The color liquid crystal display according to claim 1, wherein said black matrix is a layer of black matrix material, with edges of the primary color patterns being provided on the layer of black matrix material.

6. The color liquid crystal display according to claim 1, wherein the transparent protective film has a flatness of 0.2 μ

m or less.

7. The color liquid crystal display according to claim 1, wherein the dye prevention area filling gaps between the color patterns is filled with the transparent protective film.

25. The color liquid crystal display according to claim 1, further comprising a transparent electrode over the protective film.

8. A color liquid crystal display having a color filter substrate, comprising:

a black matrix deposited over a substrate;

a layer of three primary colored patterns colored by thermal dye transfer technology, the colored patterns being separated by gaps; and

a transparent protective film formed over the colored patterns and the black matrix;

wherein the protective film is a metal-containing organic silicon compound that can be hardened by light and heat.

9. The color liquid crystal display according to claim 8, wherein said gaps separating said colored patterns are filled with said transparent protective film.

10. The color liquid crystal display according to claim 9, further comprising a dye diffusion stopper layer provided between said colored patterns and said transparent protective film.

11. The color liquid crystal display according to claim 8, further comprising a dye diffusion stopper layer on the colored patterns, to prevent diffusion of dye from respective colored patterns.

12. The color liquid crystal display according to claim 8, wherein said gaps separating said colored patterns are filled with said black matrix.

13. The color liquid crystal display according to claim 12, wherein said black matrix prevents diffusion of dye in a direction between colored patterns.

14. The color liquid crystal display according to claim 12, wherein a difference in thickness of the black matrix filling the gaps and of the colored patterns is at most 0.1 μ

m.

15. The color liquid crystal display according to claim 8, wherein said black matrix is formed of a metal film.

16. The color liquid crystal display according to claim 8, wherein said black matrix is formed of a material with low light transmittivity.

26. The color liquid crystal display according to claim 8, further comprising a transparent electrode over the protective film.

17. A method of manufacturing a color filter substrate of a color liquid crystal display, the color filter substrate including three primary color filters separated by a black matrix on a transparent substrate that forms the color liquid crystal display, comprising at least:

a black matrix forming process to form a black matrix on the transparent substrate, using a macromolecular material containing a material with a low transmittivity;

a dye receiving layer pattern forming process, which includes coating a transparent dye receiving layer of a negative photosensitive resin over the black matrix, sensitizing the dye receiving layer by a back exposure method, which radiates light from a side of the transparent substrate opposite the black matrix forming surface to harden the dye receiving layer, and developing the dye receiving layer to form dye receiving layer patterns corresponding to three primary colors;

a coloring process to color the dye receiving layer patterns in three primary colors by thermal dye transfer technology to make them colored patterns; and

a protective film forming process to form over the colored patterns produced by the coloring process a protective film made from a metal-containing organic silicon compound that can be hardened by light or heat.

18. A method according to claim 17, wherein a difference in thickness between the colored patterns of three primary colors and the black matrix film, respectively formed in the coloring process and in the black matrix forming process, is less than 0.1 μ

m.

19. A method according to claim 17, wherein the coloring process includes applying a laser beam to a thermal dye transfer film to transfer dye to the transparent dye receiving layer to color the dye receiving layer in three primary colors.

20. A method of manufacturing a color filter substrate of a color liquid crystal display, the color filter substrate including three primary color filters separated by a black matrix on a transparent substrate that forms the color liquid crystal display, comprising at least:

a dye receiving layer pattern forming process to form over the transparent substrate dye receiving layer patterns which are separated by gaps;

a coloring process to color the dye receiving layer patterns in three primary colors by thermal dye transfer technology to make them colored patterns;

a black matrix forming process which includes coating a macromolecular material containing a material with a low transmittivity over the colored patterns produced by the coloring process, radiating light from a side of the transparent substrate opposite the black matrix forming surface to harden the macromolecular material filling the gaps between the colored patterns, and developing the macromolecular material to form a black matrix; and

a protective film forming process to form over the colored patterns produced by the coloring process a protective film made from a metal-containing organic silicon compound that can be hardened by light or heat.

21. A method according to claim 20, wherein the coloring process includes applying a laser beam to a thermal dye transfer film to transfer dye to the transparent dye receiving layer to color the dye receiving layer in three primary colors.

22. A color liquid crystal display having a color filter substrate, comprising:

a layer of three primary colored patterns colored by thermal dye transfer technology, the colored patterns being separated by gaps and are provided overlying a substrate;

a black matrix filling said gaps; and

a transparent protective film overlying said layer of three primary colored patterns and said black matrix;

wherein the protective film is a metal-containing organic silicon compound that can be hardened by light and heat.

23. The color liquid crystal display according to claim 22, further comprising a transparent electrode formed over the protective film.

24. The color liquid crystal display according to claim 22, wherein a difference in thickness between the black matrix filling said gaps and the layer of three primary colored patterns is at most 0.1 μ

m.