Display substrate and method for manufacturing the same and display device

• US 10,978,664 B2
• Filed: 05/10/2019
• Issued: 04/13/2021
• Est. Priority Date: 11/22/2018
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Fan, Yan, Fan, Xing, Gao, Hao, Wen, Xiangmin
• Primary Examiner(s): Coleman, William
• Application Number:
  US16/409,369
• Publication Number:
  US 20200168835A1
• Time in Patent Office: 704 Days
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/858 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A display panel and a method for manufacturing the same and a display device are disclosed. The display substrate includes: a base substrate having a plurality of pixel areas, at least one of the plurality of pixel areas including a first electrode layer, an organic functional layer and a second electrode layer stacked in sequence on the base substrate; and a third electrode layer on a side of the second electrode layer facing away from the base substrate; wherein the third electrode layer is electrically connected to the second electrode layer.

Claims

1. A display substrate comprising:

a base substrate on which a plurality of pixel areas are arranged, at least one of the plurality of pixel areas comprising a first electrode layer, an organic functional layer and a second electrode layer stacked in sequence on the base substrate; and

a third electrode layer on a side of the second electrode layer facing away from the base substrate;

wherein the third electrode layer is electrically connected to the second electrode layer, and

wherein the material of the third electrode layer comprises an indium tin oxide, an indium zinc oxide or both of them.

2. The display substrate according to claim 1, further comprising a transparent dielectric layer between the second electrode layer and the third electrode layer.

3. The display substrate according to claim 1, wherein the third electrode layer is a transparent electrode layer and the second electrode layer is a partially transparent metal electrode layer.

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

5. The display substrate according to claim 2, wherein an orthographic projection of the transparent dielectric layer on the base substrate covers orthographic projections of the plurality of pixel areas on the base substrate.

6. The display substrate according to claim 2, wherein the transparent dielectric layer is made from an organic insulating material or an inorganic insulating material.

7. The display substrate according to claim 2, wherein the transparent dielectric layer has a refractive index of 1.0 to 2.5.

8. The display substrate according to claim 2, wherein the transparent dielectric layer has a thickness of 30 nanometers to 300 nanometers.

9. The display substrate according to claim 5, wherein the transparent dielectric layer comprises a plurality of dielectric areas, and an orthographic projection of each of the plurality of dielectric areas on the base substrate covers an orthographic projection of one of the plurality of pixel areas on the base substrate and the third electrode layer is electrically conducted to the second electrode layer through gaps between adjacent ones of the plurality of dielectric areas.

10. The display device according to claim 4, wherein the display substrate further comprises a transparent dielectric layer between the second electrode layer and the third electrode layer.

11. The display device according to claim 4, wherein the third electrode layer is a transparent electrode layer and the second electrode layer is a partially transparent metal electrode layer.

12. The display device according to claim 10, wherein an orthographic projection of the transparent dielectric layer on the base substrate covers orthographic projections of the plurality of pixel areas on the base substrate.

13. The display device according to claim 12, wherein the transparent dielectric layer comprises a plurality of dielectric areas, and an orthographic projection of each of the plurality of dielectric areas on the base substrate covers an orthographic projection of one of the plurality of pixel areas on the base substrate and the third electrode layer is electrically conducted to the second electrode layer through gaps between adjacent ones of the plurality of dielectric areas.

14. The display device according to claim 11, wherein the transparent dielectric layer is made from an organic insulating material or an inorganic insulating material.

15. The display device according to claim 11, wherein the transparent dielectric layer has a refractive index of 1.0 to 2.5.

16. The display device according to claim 11, wherein the transparent dielectric layer has a thickness of 30 nanometers to 300 nanometers.

17. A method for manufacturing a display substrate, the method comprising:

forming a first electrode layer, an organic functional layer and a second electrode layer sequentially in pixel areas on a base substrate;

forming a third electrode layer on a side of the second electrode layer facing away from the base substrate, the third electrode layer being electrically connected to the second electrode layer,

wherein the material of the third electrode layer comprises an indium tin oxide, an indium zinc oxide or both of them.

18. The method according to claim 17, wherein after forming the second electrode layer and before forming the third electrode layer, the method further comprises:

forming a transparent dielectric layer on a side of the second electrode layer facing away from the base substrate.

19. The method according to claim 18, wherein the forming a transparent dielectric layer on a side of the second electrode layer facing away from the base substrate further comprises:

patterning the transparent dielectric layer to form a plurality of dielectric areas, an orthographic projection of each of the plurality of dielectric areas on the base substrate covering an orthographic projection of one of the plurality of pixel areas on the base substrate,

wherein the third electrode layer is electrically conducted to the second electrode layer through gaps between adjacent ones of the plurality of dielectric areas.