Display panel and preparation method thereof, and display apparatus

Patent metadata

Field	Value
Publication number	US-11454840-B2
Application number	US-202117225077-A
Country	US
Kind code	B2
Filing date	Apr 7, 2021
Priority date	Sep 22, 2020
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

Provided are a display panel, a preparation method thereof, and a display apparatus. The display panel includes an array substrate and a color filter substrate aligned and combined into a cell. The color filter substrate includes a first base substrate and a plurality of color resist blocks arranged at intervals on the first base substrate. The array substrate includes a second base substrate and a plurality of pixel electrodes arranged at intervals on the second base substrate. The pixel electrodes are in one-to-one correspondence with the color resist blocks. The display panel includes a bending area and a non-bending area located at least on one side of the bending area. A density of the pixel electrodes in the bending area is less than that in the non-bending area, and a density of the color resist blocks in the bending area is less than that in the non-bending area.

First claim

What is claimed is:

1. A display panel, comprising:
an array substrate and a color filter substrate which are aligned and combined into a cell, wherein the color filter substrate comprises a first base substrate and a plurality of color resist blocks arranged at intervals on the first base substrate, the array substrate comprises a second base substrate and a plurality of pixel electrodes arranged at intervals on the second base substrate, the pixel electrodes are in one-to-one correspondence with the color resist blocks, the display panel comprises a bending area and a non-bending area located at least on one side of the bending area, a density of the pixel electrodes in the bending area is less than a density of the pixel electrodes in the non-bending area, and a density of the color resist blocks in the bending area is less than a density of the color resist blocks in the non-bending area,
wherein the first base substrate comprises a first substrate, a strain layer arranged on the first substrate, and a black matrix arranged on the strain layer, the black matrix is arranged between adjacent color resist blocks, the strain layer is at least arranged in the bending area, the strain layer comprises a first strain region and a second strain region, the black matrix covers the first strain region, the color resist blocks are located in the second strain region, and a tensile modulus of the first strain region is less than a tensile modulus of the second strain region.

2. The display panel according to claim 1 , wherein in a direction perpendicular to a bending axis of the bending area, a spacing between adjacent pixel electrodes in the bending area is larger than a spacing between adjacent pixel electrodes in the non-bending area, a spacing between adjacent color resist blocks in the bending area is larger than a spacing between adjacent color resist blocks in the non-bending area; in a direction parallel to the bending axis of the bending area, the spacing between adjacent pixel electrodes in the bending area is equal to the spacing between adjacent pixel electrodes in the non-bending area, and the spacing between adjacent color resist blocks in the bending area is equal to the spacing between adjacent color resist blocks in the non-bending area.

3. The display panel according to claim 1 , wherein in a direction perpendicular to a bending axis of the bending area, a length of the pixel electrodes in the bending area is larger than a length of the color resist blocks in the bending area.

4. The display panel according to claim 3 , wherein in the direction perpendicular to the bending axis of the bending area, the length of the pixel electrodes in the bending area is 30 microns to 400 microns, and the length of the color resist blocks in the bending area is 20 microns to 200 microns.

5. The display panel according to claim 1 , wherein in a direction parallel to a bending axis of the bending area, a width of the pixel electrodes in the non-bending area is equal to a width of the pixel electrodes in the bending area, and a width of the color resist blocks in the non-bending area is equal to a width of the color resist blocks in the bending area.

6. The display panel according to claim 1 , wherein the color filter substrate further comprises a flat layer covering the color resist blocks and a spacer layer arranged on the flat layer, the spacer layer is located in the non-bending area, the display panel further comprises a plurality of spacer columns arranged between the array substrate and the color filter substrate, the plurality of spacer columns comprise first spacer columns supported between the spacer layer and the second base substrate, and second spacer columns supported between the flat layer and the second base substrate.

7. The display panel according to claim 1 , wherein the first strain region comprises a plurality of first strain grooves extending in a direction parallel to a bending axis of the bending area and arranged at intervals in a direction perpendicular to the bending axis of the bending area, the second strain region comprises pixel ribs formed between adjacent first strain grooves, and the black matrix covers the first strain grooves and the pixel ribs except positions corresponding to the color resist blocks.

8. The display panel according to claim 7 , wherein a depth of the first strain grooves is less than or equal to a thickness of the strain layer in a direction perpendicular to the first substrate.

9. The display panel according to claim 7 , further comprising spacer columns arranged between the color filter substrate and the array substrate, wherein the spacer columns correspond to the pixel ribs in position and are located between adjacent color resist blocks.

10. The display panel according to claim 1 , wherein the first strain region comprises a plurality of first strain grooves extending in a direction parallel to a bending axis of the bending area and arranged at intervals in a direction perpendicular to the bending axis of the bending area and a plurality of second strain grooves extending in a direction perpendicular to the bending axis of the bending area and arranged at intervals in a direction parallel to the bending axis of the bending area, the second strain region comprises pixel islands formed between the second strain grooves and the first strain grooves, the color resist blocks are located on one side of the pixel islands close to the array substrate, and the black matrix covers the first strain grooves and the second strain grooves.

11. The display panel according to claim 10 , wherein in a direction perpendicular to the first substrate, a depth of the first strain grooves is less than or equal to a thickness of the strain layer, and a depth of the second strain grooves is less than or equal to the thickness of the strain layer.

12. The display panel according to claim 11 , further comprising spacer columns arranged between the color filter substrate and the array substrate, wherein the spacer columns correspond to the first strain grooves or the second strain grooves in position.

13. The display panel according to claim 1 , wherein a thickness of the strain layer is 5 microns to 30 microns.

14. The display panel according to claim 1 , wherein, after bending, orthographic projections of the color resist blocks of the bending area on the second base substrate are located within ranges of orthographic projections of the pixel electrodes corresponding to the color resist blocks in the bending area on the second base substrate.

15. The display panel according to claim 1 , wherein in a direction perpendicular to a bending axis of the bending area, a length of the pixel electrodes in the non-bending area is less than a length of the pixel electrodes in the bending area; and in a direction parallel to the bending axis of the bending area, a width of the pixel electrodes in the non-bending area is equal to a width of the pixel electrodes in the bending area.

16. The display panel according to claim 1 , wherein in a direction perpendicular to a bending axis of the bending area, a length of the color resist blocks in the non-bending area is equal to a length of the pixel electrodes in the bending area; and in a direction parallel to the bending axis of the bending area, a width of the color resist blocks in the non-bending area is equal to a width of the color resist blocks in the bending area.

17. A display apparatus, comprising the display panel according to claim 1 .

18. A preparation method of a display panel, comprising:
forming a color filter

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Li Shulei
• Zhao Menghua
• Hsieh Changhan
• Kang Zhao

Classifications

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133512

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

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title