Organic light-emitting display substrate, manufacturing method therefor, and organic light-emitting display device

• US 9,960,218 B2
• Filed: 04/12/2016
• Issued: 05/01/2018
• Est. Priority Date: 05/08/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Yang, Dongfang
• Primary Examiner(s): Mandala, Michelle
• Application Number:
  US15/321,451
• Publication Number:
  US 20170213879A1
• Time in Patent Office: 749 Days
• Field of Search: None
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light-emitting display substrate, a manufacturing method therefor, and an organic light-emitting display device. The organic light-emitting display substrate comprises a base substrate and multiple sub-pixels that are located on the base substrate and that are arranged in an array manner. Each sub-pixel comprises an organic light-emitting layer. At least one blocking element is disposed between two adjacent sub-pixels that emit light of different colors.

Claims

1. An organic light-emitting display substrate, comprising a base substrate and a plurality of sub-pixels arranged in an array on the base substrate,

wherein, each of the sub-pixels includes an organic light-emitting layer, and at least one blocking element is provided between two adjacent sub-pixels emitting light of different colors;

wherein, a plurality of blocking elements are provided between two adjacent sub-pixels, each the blocking element has a strip shape, and a long side of each blocking element is parallel to a side edge of the sub-pixel which is close to the blocking element;

the plurality of blocking elements between two adjacent sub-pixels are arranged in a staggered manner, and there is a gap between two adjacent blocking elements.

2. The organic light-emitting display substrate according to claim 1, wherein, at least one blocking element is provided between two adjacent sub-pixels emitting light of a same color.

3. The organic light-emitting display substrate according to claim 1, wherein, a top end of the blocking element is higher than a top end of the organic light-emitting layer.

4. The organic light-emitting display substrate according to claim 1, wherein, only one blocking element is provided between two adjacent sub-pixels, each of the blocking element has a strip shape, a long side of each blocking element is parallel to a side edge of the sub-pixel which is close to the blocking element.

5. The organic light-emitting display substrate according to claim 4, wherein, a length of the long side of the blocking element is greater than or equal to a length of the side edge of the sub-pixel which is close to the blocking element.

6. The organic light-emitting display substrate according to claim 1, wherein, an effective length of each blocking element in a direction parallel to the side edge of the sub-pixel which is close to the blocking element is greater than or equal to the length of the side edge of the sub-pixel which is close to the blocking element.

7. The organic light-emitting display substrate according to claim 1, wherein, a length of the long side of each of the blocking elements is less than a length of the side edge of each of the blocking elements.

8. The organic light-emitting display substrate according to claim 1, further comprising:

a cathode layer covering the organic light-emitting layer and the blocking element, wherein the top end of the blocking element has a circular arc shape.

9. The organic light-emitting display substrate according to claim 8, wherein, the sub-pixel further includes an anode layer located between the organic light-emitting layer and the base substrate, and

the organic light-emitting display substrate further comprises a pixel defining layer located above the anode layer, the pixel defining layer located between two adjacent sub-pixels has a vertical section of a circular arc shape, and the blocking element is located on the pixel defining layer, or, the blocking element passes through the pixel defining layer.

10. The organic light-emitting display substrate according to claim 9, wherein, the blocking element passes through the pixel defining layer, and the organic light-emitting display substrate further comprises an auxiliary electrode layer located below the organic light-emitting layer.

11. The organic light-emitting display substrate according to claim 10, wherein, a material of the blocking element comprises a metal, and the auxiliary electrode layer is electrically connected with the cathode layer via the blocking element.

12. The organic light-emitting display substrate according to claim 1, wherein, the at least one blocking element surrounds the plurality of the sub-pixels arranged in an array, so as to form a pixel defining layer.

13. The organic light-emitting display substrate according to claim 12, wherein the blocking element includes a bottom of a circular arc shape and a top located above the bottom, and a top end of the top has a circular arc shape.

14. An organic light-emitting display device, comprising the organic light-emitting display substrate according to claim 1.

16. The organic light-emitting display substrate according to claim 2, wherein, a top end of the blocking element is higher than a top end of the organic light-emitting layer.

17. The organic light-emitting display substrate according to claim 2, wherein, only one blocking element is provided between two adjacent sub-pixels, each of the blocking element has a strip shape, a long side of each blocking element is parallel to a side edge of the sub-pixel which is close to the blocking element.

15. A fabrication method of an organic light-emitting display substrate, comprising:

forming at least one blocking element between two adjacent sub-pixels emitting light of different colors on a base substrate; and

forming an organic light-emitting layer in each of the sub-pixels;

wherein, the organic light-emitting layer is formed after forming the blocking element;

wherein, forming an organic light-emitting layer in each of the sub-pixels comprises;

covering the base substrate on which the blocking element is formed with a mask,

bringing the mask into contact with a top end of the blocking element, and

forming the organic light-emitting layer in each of the sub-pixels by an evaporating process.