Display substrate, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-10658450-B2
Application number	US-201816111411-A
Country	US
Kind code	B2
Filing date	Aug 24, 2018
Priority date	Aug 31, 2017
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Embodiments of the present disclosure provide a display substrate, a manufacturing method thereof, and a display device. The display substrate includes: a display area; an edge area; a bent portion between the display area and the edge area, the edge area being bent at a predetermined angle towards a side facing away from a display surface of the display area by means of the bent portion; and a row driving circuit in the edge area.

First claim

The invention claimed is:

1. A display substrate comprising:
a display area;
an edge area;
a bent portion between the display area and the edge area, the edge area being bent at a predetermined angle towards a side facing away from a display surface of the display area by means of the bent portion; and
a row driving circuit in the edge area, wherein

the bent portion comprises a conductive layer and a groove, wherein the groove is recessed into the bent portion along a direction facing away from the display surface of the display area, the groove comprises a filling layer and the conductive layer is disposed on the filling layer.

2. The display substrate according to claim 1 , wherein the predetermined angle ranges from 0° to about 180°.

3. The display substrate according to claim 2 , wherein the predetermined angle is about 90°.

4. The display substrate according to claim 1 , further comprising a pixel circuit disposed in the display area, wherein the pixel circuit is electrically connected to the row driving circuit via the conductive layer.

5. The display substrate according to claim 4 , wherein the bent portion further comprises a protective layer covering the conductive layer.

6. The display substrate according to claim 4 , further comprising a connection lead disposed between the pixel circuit and the conductive layer.

7. The display substrate according to claim 4 , further comprising a connection lead disposed between the row driving circuit and the conductive layer.

8. The display substrate according to claim 1 , wherein a depth of the groove is about ⅓-⅔ of a thickness of the bent portion.

9. The display substrate according to claim 1 , wherein the bent portion has a length of about 1.8 to 2.1 mm.

10. The display substrate according to claim 1 , wherein the display substrate comprises two bent portions, the display area is a quadrangle, and the two bent portions are respectively disposed at edges of the display area symmetrically.

11. The display substrate according to claim 1 , wherein the display area comprises an organic light emitting device.

12. The display substrate according to claim 1 , wherein a substrate material of the display substrate includes at least one of glass, PET, and polyimide.

13. A display device comprising the display substrate according to claim 1 .

14. The display substrate according to claim 1 , wherein an orthographic projection of an edge of the row driving circuit closer to the display area on the display surface coincides with an orthographic projection of an edge of the groove away from the display area on the display surface.

15. A method for manufacturing a display substrate comprising: providing a substrate, the substrate comprising a display area, an edge area, and a spacing region located between the display area and the edge area;
forming a bent portion in the spacing region; and
forming a row driving circuit in the edge area,
wherein the edge area is bent at a predetermined angle towards a side facing away from a display surface of the display area by means of the bent portion, and
wherein forming the bent portion in the spacing region comprises:
forming a groove in the spacing region by a patterning process, such that the groove is recessed into the bent portion along a direction facing away from the display surface of the display area,
forming a filling layer in the groove, and
forming a conductive layer on a side of the filling layer away from the substrate such that the conductive layer electrically connects a pixel circuit located in the display area to the row driving circuit.

16. The method according to claim 15 , wherein the predetermined angle ranges from 0° to about 180°.

17. The method according to claim 15 , wherein forming the bent portion in the spacing region further comprises:
subjecting the spacing region to a bending process to obtain the bent portion.

18. The method according to claim 17 , wherein a depth of the groove is about ⅓ to ⅔ of a thickness of the substrate.

19. The method according to claim 17 , before the bending process, further comprising:
forming a protective layer on a side of the conductive layer away from the filling layer.

20. The method according to claim 15 , wherein an orthographic projection of an edge of the row driving circuit closer to the display area on the display surface coincides with an orthographic projection of an edge of the groove away from the display area on the display surface.

Assignees

• Boe Technology Group Co Ltd
• Ordos Yuansheng Optoelectronics Co Ltd
• Ordos Yuansheng Optoelectronics Tech Co Ltd

Inventors

• Chen Yipeng
• Liu Libin

Classifications

• H05K1/147

  at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence) · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title