Color filter substrate, method of manufacturing the same, and display panel

Patent metadata

Field	Value
Publication number	US-12032185-B2
Application number	US-202017289331-A
Country	US
Kind code	B2
Filing date	May 20, 2020
Priority date	May 23, 2019
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A color filter (CF) substrate includes a CF structure disposed on a base, and multiple pixel regions each including multiple sub-pixel regions. The CF structure includes a nanostructure layer including multiple nanostructures and a light guide structure layer including multiple light guide structures, sequentially provided on the base. Each light guide structure is in a corresponding pixel region, and includes multiple light guide sub-portions. Each light guide sub-portion is in a corresponding sub-pixel region. Each sub-pixel region corresponds to a nanostructure, and each nanostructure is in a corresponding sub-pixel region. Each of the light guide sub-portions in one pixel region is configured such that light incident on the light guide sub-portions exits at different angles and enters into the nanostructure in the sub-pixel region corresponding thereto. Each nanostructure is configured such that light exiting from the sub-pixel region corresponding thereto has a predetermined color.

First claim

What is claimed is:

1. A color filter substrate, comprising:
a base; and
a color filter structure on a side of the base,
wherein the color filter substrate comprises a plurality of pixel regions, and each of the plurality of pixel regions comprises a plurality of sub-pixel regions;
the color filter structure comprises a nanostructure layer and a light guide structure layer, the light guide structure layer is on a side of the nano structure layer distal to the base, the light guide structure layer comprises a plurality of light guide structures, each of the plurality of light guide structures is in a corresponding one of the plurality of pixel regions, each of the plurality of light guide structures comprises a plurality of light guide sub-portions, each of the plurality of light guide sub-portions is in a corresponding one of the plurality of sub-pixel regions of the pixel region in which the light guide sub-portion is located, the nanostructure layer comprises a plurality of non-periodic nanostructures, each of the plurality of sub-pixel regions corresponds to at least one of the non-periodic nanostructures, and each of the plurality of non-periodic nanostructures is in a corresponding one of the plurality of sub-pixel regions; and
each of the plurality of light guide sub-portions in a same pixel region is configured such that light incident respectively on the plurality of light guide sub-portions in the same pixel region exits at different angles and enters into the at least one non-periodic nanostructure in the sub-pixel region in which the light guide sub-portion is located, and each non-periodic nanostructure is configured to enable coupling and interference of light incident thereon such that light exiting from the sub-pixel region in which the non-periodic nanostructure is located has a predetermined color.

2. The color filter substrate of claim 1 , wherein each non-periodic nanostructure comprises: a plurality of grooves in the non-periodic nanostructure and recessed from a surface of the non-periodic nano structure distal to the base and arranged in a first direction parallel to the surface of the non-periodic nanostructure, and a slit penetrating the non-periodic nanostructure in a third direction perpendicular to the surface of the non-periodic nano structure, each groove being recessed from the surface of the non-periodic nanostructure in the third direction by a depth less than a thickness of the non-periodic nanostructure in the third direction, and in each non-periodic nanostructure, widths of the plurality of grooves in the first direction are non-periodic and pitches of the plurality of grooves in the first direction are non-periodic.

3. The color filter substrate of claim 2 , wherein
in each non-periodic nanostructure, the widths of the plurality of grooves in the first direction are different from each other, the pitches of the plurality of grooves in the first direction are different from each other, and the width of each of the plurality of grooves in the first direction is different from a width of the slit in the first direction.

4. The color filter substrate of claim 2 , wherein
in each non-periodic nanostructure, the plurality of grooves and the slit extend parallel to each other in a second direction parallel to the surface of the non-periodic nanostructure and intersecting the first direction, and lengths of the plurality of grooves and the slit in the second direction are equal to a size of the non-periodic nanostructure in the second direction.

5. The color filter substrate of claim 2 , wherein
in each non-periodic nanostructure, the plurality of grooves have a same depth in the third direction.

6. The color filter substrate of claim 3 , wherein in any two non-periodic nanostructures of the plurality of non-periodic nanostructures, pitches of the plurality of grooves in the first direction are different from each other, widths of the plurality of grooves in the first direction are different from each other, and the slits of the two non-periodic nanostructures have a same width in the first direction.

7. The color filter substrate of claim 4 , wherein in each non-periodic nanostructure, the non-periodic nanostructure has a width of 5 μm in the first direction.

8. The color filter substrate of claim 4 , wherein in each non-periodic nanostructure, the width of each of the plurality of grooves in the first direction is in a range from 50 nm to 400 nm, and the depth of each of the plurality of grooves in the third direction is 100 nm.

9. The color filter substrate of claim 4 , wherein in each non-periodic nanostructure, a width of the slit in the first direction is 100 nm.

10. The color filter substrate of claim 2 , wherein the plurality of sub-pixel regions in each pixel region are arranged in the first direction, and the plurality of non-periodic nanostructures are arranged in the first direction.

11. The color filter substrate of claim 10 , wherein a width of one sub-pixel region in the first direction is 1 or n times a width of one non-periodic nanostructure in the first direction, n being greater than or equal to 2 and less than or equal to 500.

12. The color filter substrate of claim 10 , wherein the plurality of sub-pixel regions of the plurality of pixel regions are arranged in an array, and a size of the plurality of non-periodic nanostructures in the second direction is equal to a size of the array of the plurality of sub-pixel regions of the plurality of pixel regions in the second direction.

13. The color filter substrate of claim 2 , wherein a transparent conductive layer is between the base and the nanostructure layer, and the nanostructure layer is on a side of the transparent conductive layer distal to the base.

14. The color filter substrate of claim 1 , wherein light exiting surfaces of the plurality of light guide sub-portions of each light guide structure facing the nanostructure layer have different angles with respect to a first surface of the nanostructure layer distal to the base, such that light exiting from the plurality of sub-pixel regions corresponding to the plurality of light guide sub-portions to the outside of the color filter substrate have different colors from each other.

15. The color filter substrate of claim 14 , wherein each pixel region comprises a red sub-pixel region, a green sub-pixel region and a blue sub-pixel region;
the light guide structure corresponding to the pixel region comprises a first light guide sub-portion, a second light guide sub-portion and a third light guide sub-portion, and the first light guide sub-portion, the second light guide sub-portion and the third light guide sub-portion are in the red sub-pixel region, the green sub-pixel region and the blue sub-pixel region, respectively; and
an angle between the light exiting surface of the first light guide sub-portion and the first surface is 0°, an acute angle between the light exiting surface of the second light guide sub-portion and the first surface is 19°, and an acute angle between the light exiting surface of the third light guide sub-portion and the first surface is 31.9°.

16. The color filter substrate of claim 1 , wherein the non-periodic nanostructure comprises silver.

17. The color filter substrate of claim 1 , wherein the light guide structure comprises polymethyl methacrylate.

18. A display panel, comprising: the color filter substrate of claim 1 , and an array substrate.

19. A method of manufacturing a color filter substrate, comprising:
forming a nanostructure layer and a light guide struc

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Yao Chengpeng
• Guo Lei
• Li Zhendong
• Zhang Wei
• Shi Xia
• Liu Jiaqing

Classifications

• G02B2207/101

  Nanooptics · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0043

  provided on the surface of the light guide · CPC title

• G02B1/045

  Light guides · CPC title

• G02F1/133521

  Interference filters · CPC title