Color filter substrate and liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-11036075-B2
Application number	US-201916466650-A
Country	US
Kind code	B2
Filing date	Feb 21, 2019
Priority date	Nov 29, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A color filter substrate and a liquid crystal display panel are provided. The color filter substrate includes photoresist blocks spaced apart, a black matrix disposed between adjacent photoresist blocks, an optically thinner medium film disposed on the photoresist blocks and the black matrix, and an overcoat layer covering the photoresist blocks, the black matrix, and the optically thinner medium film. The optically thinner medium film covers a boundary between the photoresist blocks and the black matrix. A refractive index of the optically thinner medium film is less than that of the overcoat layer. The color filter substrate and a TFT array substrate are formed into the liquid crystal display panel. Light is totally reflected at an interface between the overcoat layer and the optically thinner medium film, thereby solving issues of color shifts at large viewing angles without affecting transmittance of the liquid crystal display panel.

First claim

What is claimed is:

1. A color filter substrate, comprising:
a plurality of photoresist blocks spaced apart from each other;
a black matrix disposed between adjacent photoresist blocks;
an optically thinner medium film disposed on the photoresist blocks and the black matrix; and
an overcoat layer covering the photoresist blocks, the black matrix, and the optically thinner medium film;
wherein the optically thinner medium film covers a boundary between the photoresist blocks and the black matrix; and
wherein a refractive index of the optically thinner medium film is less than a refractive index of the overcoat layer.

2. The color filter substrate according to claim 1 , wherein the refractive index of the optically thinner medium film satisfies: n=n OC ×sin i incidence , wherein n is the refractive index of the optically thinner medium film, n oc is the refractive index of the overcoat layer, and i incidence is a preset incident critical angle.

3. The color filter substrate according to claim 2 , wherein the refractive index of the overcoat layer ranges between 1.5 and 1.6.

4. The color filter substrate according to claim 3 , wherein the refractive index of the overcoat layer is 1.55.

5. The color filter substrate according to claim 1 , wherein the photoresist blocks comprise a red photoresist block, a green photoresist block, and a blue photoresist block disposed in sequence.

6. The color filter substrate according to claim 1 , further comprising a substrate, wherein the photoresist blocks and the black matrix are disposed on a same side of the substrate, and the optically thinner medium film is disposed on a side of the photoresist blocks and the black matrix away from the substrate.

7. The color filter substrate according to claim 6 , wherein material of the substrate comprises glass or a transparent flexible material.

8. The color filter substrate according to claim 1 , wherein material of the black matrix comprises a black photoresist material.

9. The color filter substrate according to claim 1 , wherein material of the overcoat layer comprises a transparent photoresist material.

10. A liquid crystal display panel comprising the color filter substrate according to claim 1 .

11. A color filter substrate, comprising:
a plurality of photoresist blocks spaced apart from each other;
a black matrix disposed between adjacent photoresist blocks;
an optically thinner medium film disposed on the photoresist blocks and the black matrix;
an overcoat layer covering the photoresist blocks, the black matrix, and the optically thinner medium film, wherein the optically thinner medium film covers a boundary between the photoresist blocks and the black matrix; and
a substrate, wherein the photoresist blocks and the black matrix are disposed on a same side of the substrate, and the optically thinner medium film is disposed on a side of the photoresist blocks and the black matrix away from the substrate;
wherein a refractive index of the optically thinner medium film is less than a refractive index of the overcoat layer; and
wherein the refractive index of the optically thinner medium film satisfies: n=n OC ×sin i incidence , wherein n is the refractive index of the optically thinner medium film, n OC is the refractive index of the overcoat layer, and i incidence is a preset incident critical angle.

12. The color filter substrate according to claim 11 , wherein the refractive index of the overcoat layer ranges between 1.5 and 1.6.

13. The color filter substrate according to claim 12 , wherein the refractive index of the overcoat layer is 1.55.

14. The color filter substrate according to claim 11 , wherein the photoresist blocks comprise a red photoresist block, a green photoresist block, and a blue photoresist block disposed in sequence.

15. The color filter substrate according to claim 11 , wherein material of the substrate comprises glass or a transparent flexible material.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Zhao Bin
• Lin Fan

Classifications

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/133519

  Overcoatings · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title