Display substrate, manufacturing method thereof and display device

Patent metadata

Field	Value
Publication number	US-10620472-B2
Application number	US-201715556833-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Jun 30, 2016
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A display substrate, a manufacturing method thereof and a display device are provided. The display substrate includes: a base substrate, a display region disposed on the base substrate, and a peripheral region disposed at a periphery of the display region, and the peripheral region is provided with a filling area recessed toward the base substrate; the filling area is provided with an alignment mark and a filling material; and the filling material is configured for filling the filling area. The filling material is provided in filling the filling area of the display substrate, to reduce or eliminate a segment difference at the filling area, and further to avoid the incorrect alignment of liquid crystal molecules caused by the segment difference in the rubbing process, and finally to avoid poor display due to uneven display of a display panel in the working process.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate; and
a display region disposed on the base substrate and a peripheral region disposed at a periphery of the display region,
wherein the peripheral region is provided with a filling area recessed toward the base substrate, the filling area is provided with an alignment mark and a filling material, the filling material is configured for filling the filling area,
the alignment mark comprises first alignment marks and second alignment marks, and the first alignment marks and the second alignment marks are spaced apart from each other,
each of the first alignment marks is not in contact with at least one of a left side or a right side of the filling area,
each of the second alignment marks is directly in contact with both the left side and the right side of the filling area, and
both the alignment mark and the filling material are disposed on the base substrate.

2. The display substrate according to claim 1 , wherein the alignment mark is disposed on one side closer to the base substrate compared with the filling material, and the filling material is disposed above the alignment mark and is made of a transparent material.

3. The display substrate according to claim 1 , wherein the filling material is configured for filling the filling area so that the filling area is flush with an area of the peripheral region outside of the filling area.

4. The display substrate according to claim 3 , wherein the display substrate is a color filter substrate, both the display region and the area of the peripheral region outside of the filling area comprise a black matrix, a color resin layer, and a dielectric protective layer, which are laminated arranged, and the filling area comprises the alignment mark and the dielectric protective layer.

5. The display substrate according to claim 1 , wherein a plurality of spacers are further disposed in the display region and the peripheral region, and the filling material is the same as a material of the spacers.

6. The display substrate according to claim 5 , wherein the filling material and the material of the spacers may be at least one selected from the group consisting of melamine resin, polystyrene resin, and urea resin.

7. The display substrate according to claim 1 , wherein shapes of vertical projections of the alignment marks on the base substrate comprise at least one of a cross shape, a circular shape, an annular shape, and a zigzagged shape.

8. The display substrate according to claim 3 , wherein the display substrate is an array substrate, both the display region and the area of the peripheral region outside of the filling area comprise a first metal layer, an insulating layer and a passivation layer which are laminated arranged, and the filling area comprises the alignment mark, the insulating layer and the passivation layer.

9. The display substrate according to claim 8 , wherein the display region and the area of the peripheral region outside of the filling area are further provided with a planarization layer on the first metal layer, the insulating layer, and the passivation layer, and the filling material is the same as a material of the planarization layer.

10. The display substrate according to claim 9 , wherein the filling material and the planarization layer are formed in a same processing operation.

11. A method for manufacturing a display substrate, comprising:
forming a display region and a peripheral region on a base substrate, wherein the peripheral region is disposed at a periphery of the display region;
forming a filling area recessed toward the base substrate in the peripheral region; and
forming an alignment mark and a filling material in the filling area,
wherein the alignment mark comprises first alignment marks and second alignment marks, and the first alignment marks and the second alignment marks are spaced apart from each other,
each of the first alignment marks is not in contact with at least one of a left side or a right side of the filling area,
each of the second alignment marks is directly in contact with both the left side and the right side of the filling area, and
both the alignment mark and the filling material are disposed on the base substrate.

12. The method according to claim 11 , wherein the forming the alignment mark and the filling material in the filling area comprises:
forming the alignment mark and the filling material in the filling area in sequence, wherein the filling material is made of a transparent material.

13. The method according to claim 11 , wherein the filling material is configured for filling the filling area to allow that the filling area to be parallel to and level with an area of the peripheral region outside of the filling area.

14. A display device, comprising the display substrate according to claim 1 .

15. The display substrate according to claim 2 , wherein the filling material is configured for filling the filling area so that the filling area is flush with an area of the peripheral region outside of the filling area.

16. The display substrate according to claim 2 , wherein a plurality of spacers are further disposed in the display region and the peripheral region, and the filling material is the same as a material of the spacers.

17. The display substrate according to claim 3 , wherein a plurality of spacers are further disposed in the display region and the peripheral region, and the filling material is the same as a material of the spacers.

18. The display substrate according to claim 4 , wherein a plurality of spacers are further disposed in the display region and the peripheral region, and the filling material is the same as a material of the spacers.

19. The display substrate according to claim 2 , wherein shapes of vertical projections of the alignment marks on the base substrate comprise at least one of a cross shape, a circular shape, an annular shape, and a zigzagged shape.

20. The method according to claim 12 , wherein the filling material is configured for filling the filling area so that the filling area is parallel to and level with an area of the peripheral region outside of the filling area.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Lin Haiyun
• Zhao Qinghui
• Zhou Yongshan
• Li Jingpeng
• Xie Zhenyu
• Min Tae Yup

Classifications

• G02F1/133516 Primary

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G02F1/133512

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

• G02F1/1333 Primary

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

• G02F1/13394

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/133514

  Colour filters · CPC title