Display substrate and manufacturing method therefor, and display apparatus

Patent metadata

Field	Value
Publication number	US-12295216-B2
Application number	US-202117769030-A
Country	US
Kind code	B2
Filing date	May 17, 2021
Priority date	May 29, 2020
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A display substrate has a central region and an edge region, and includes a plurality of structural units arranged in an array in the central region and the edge region; each structural unit is provided with a plurality of through holes, and divided by the plurality of through holes into a pixel island for displaying and a bridge portion for transmitting signals; the plurality of through holes are arranged around the pixel island; a part of the bridge portion is positioned between the pixel island and the through holes, and another part of the bridge portion is positioned between adjacent through holes; and a pixel pitch between adjacent pixel islands in the structural units in the edge region is equal to a pixel pitch between adjacent pixel islands in the structural units in the central region.

First claim

What is claimed is:

1. A display substrate, wherein the display substrate has a central region and an edge region, and the display substrate comprises a plurality of structural units arranged in an array in the central region and the edge region;
wherein each structural unit is provided with a plurality of through holes, and divided by the plurality of through holes into a pixel island for displaying and a bridge portion for transmitting signals; the plurality of through holes are arranged around the pixel island; a part of the bridge portion is positioned between the pixel island and the through holes, and another part of the bridge portion is positioned between adjacent through holes; and
wherein a pixel pitch between adjacent pixel islands in the structural units in the edge region is equal to a pixel pitch between adjacent pixel islands in the structural units in the central region, and both are equal to a first pixel pitch,
wherein the through hole comprises a first long-strip-shaped hole and second long-strip-shaped holes located at opposite ends of the first long-strip-shaped hole, and the first long-strip-shaped hole is communicated with the second long-strip-shaped holes; a length direction of the first long-strip-shaped hole intersects with a length direction of the second long-strip-shaped holes, and a center point of the first long-strip-shaped hole and center points of the second long-strip-shaped holes are on a same straight line; and
wherein a length of the first long-strip-shaped hole is greater than a length of the second long-strip-shaped holes.

2. The display substrate according to claim 1 , wherein a difference between the length of the first long-strip-shaped hole and the length of the second long-strip-shaped holes is 150 μm to 200 μm.

3. The display substrate according to claim 2 , wherein the length of the first long-strip-shaped hole is 400 μm to 1000 μm; and the length of the second long-strip-shaped holes is 220 μm to 820 μm.

4. The display substrate according to claim 1 , wherein widths of the first long-strip-shaped hole and the second long-strip-shaped holes are equal.

5. The display substrate according to claim 4 , wherein the widths of the first long-strip-shaped hole and the second long-strip-shaped holes are 5 μm to 50 μm.

6. The display substrate according to claim 1 , wherein
the structure unit is provided with four pixel islands arranged in an array in a first direction and a second direction, and each pixel island is surrounded by four through holes; wherein
the second direction is a length direction of the first long-strip-shaped holes of two through-holes that are opposite in the first direction, and the first direction is a length direction of the first long-strip-shaped holes of two through-holes that are opposite in the second direction, and the second long-strip-shaped hole of one of any two adjacent through holes is opposite to a middle part of the first long-strip-shaped hole of another one of the any two adjacent through holes.

7. The display substrate according to claim 6 , wherein the first pixel pitch is one half of a sum of the length of the first long-strip-shaped hole and the length of the second long-strip-shaped hole.

8. A manufacturing method of the display apparatus, comprising:
providing a base opened with a plurality of hole regions;
forming the display substrate according to claim 1 on the base, and the through holes of the display substrate correspond to the hole regions of the base one by one;
separating the display substrate from the base;
attaching the separated display substrate on an arc-shaped backplane to form an arc-shaped display structure;
wherein in the arc-shaped display structure, a pixel pitch between adjacent pixel islands in the structural unit of the central region is equal to a second pixel pitch, and a pixel pitch between adjacent pixel islands in the structural unit of the edge region is equal to a third pixel pitch, and the third pixel pitch is greater than the first pixel pitch and smaller than the second pixel pitch.

9. The manufacturing method according to claim 8 , wherein a difference between the second pixel pitch and the first pixel pitch is 10 μm to 100 μm.

10. The manufacturing method according to claim 9 , wherein separating the display substrate from the base comprises:
separating the display substrate from the base by means of laser separation, or chemical etching separation, or physical mechanical separation.

11. The manufacturing method according to claim 9 , wherein attaching the separated display substrate on the arc-shaped backplane comprises:
attaching the central region of the separated display substrate to a central region of the arc-shaped backplane; and
rolling a roller from the central region of the display substrate to the edge region of the display substrate, causing the edge region of the display substrate to be attached with an edge region of the arc-shaped backplane.

12. A display apparatus, comprising an arc-shaped display structure, wherein the arc-shaped display structure is formed by attaching the display substrate according to claim 1 with an arc-shaped backplane;
wherein in the arc-shaped display structure, a pixel pitch between adjacent pixel islands in the structural unit of the central region is equal to a second pixel pitch, and a pixel pitch between adjacent pixel islands in the structural unit of the edge region is equal to a third pixel pitch, and the third pixel pitch is greater than the first pixel pitch and smaller than the second pixel pitch.

13. The display apparatus according to claim 12 , wherein a difference between the second pixel pitch and the first pixel pitch is 10 μm to 100 μm.

14. The display apparatus according to claim 12 , wherein the arc-shaped backplane comprises an inner arc surface close to the arc-shaped display structure and an outer arc surface away from the arc-shaped display structure, the inner arc surface and the outer arc surface have a same shape, and the inner arc surface and the outer arc surface are in one of a circular arc type, an elliptic arc type, or a parabolic shape.

15. The display apparatus according to claim 14 , wherein an angle between tangents corresponding to two ends of the outer arc surface in a bending direction is smaller than 180° and greater than or equal to 170°.

16. The display apparatus according to claim 12 , wherein the display apparatus is a head-mounted display apparatus.

17. The display substrate according to claim 2 , wherein the structure unit is provided with four pixel islands arranged in an array in a first direction and a second direction, and each pixel island is surrounded by four through holes;
wherein the second direction is a length direction of the first long-strip-shaped holes of two through-holes that are opposite in the first direction, and the first direction is a length direction of the first long-strip-shaped holes of two through-holes that are opposite in the second direction, and the second long-strip-shaped hole of one of any two adjacent through holes is opposite to a middle part of the first long-strip-shaped hole of another one of the any two adjacent through holes.

18. The display substrate according to claim 5 , wherein the structure unit is provided with four pixel islands arranged in an array in a first direction and a second direction, and each pixel island is surrounded by four through holes;
wherein the second direction is a length direction of the first long-strip-shaped holes of two through-holes that are opposite in the first dir

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhao Jia
• Wang Pinfan
• Cao Fangxu
• Song Zunqing

Classifications

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K71/80

  using temporary substrates · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title