Organic light-emitting display panel, manufacturing method thereof, and organic light-emitting display device

• US 10,483,338 B2
• Filed: 08/07/2018
• Issued: 11/19/2019
• Est. Priority Date: 04/02/2018
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Huo, Sitao, Zhang, Guofeng
• Primary Examiner(s): Tornow, Mark W
• Application Number:
  US16/057,759
• Publication Number:
  US 20180350888A1
• Time in Patent Office: 469 Days
• 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 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

The present disclosure provides organic light-emitting display panel, manufacturing method, and organic light-emitting display device. Organic light-emitting display panel includes: array substrate, planarization layer, pixel defining layer, and multiple organic light-emitting devices. The pixel defining layer has multiple pixel apertures, each of which is provided therein with at least two organic light-emitting devices for emitting a same color. Anodes of the organic light-emitting devices are one-to-one electrically connected to pixel driving circuits on the array substrate. The planarization layer is provided with multiple grooves, which are disposed between any adjacent two organic light-emitting devices in each pixel aperture and are filled with hydrophobic layer. The hydrophobic layer is provided with multiple trenches. Extending direction of each groove is the same as extending direction of each trench. The organic light-emitting function layer breaks at each trench. The present disclosure can improve display effect of organic light-emitting display panel.

Claims

1. An organic light-emitting display panel, comprising:

an array substrate;

a plurality of pixel driving circuits disposed on the array substrate;

a planarization layer disposed on the array substrate, wherein a plurality of connection holes corresponding to the plurality of pixel driving circuits is provided in the planarization layer;

a pixel defining layer disposed on the planarization layer, wherein the pixel defining layer comprises a plurality of pixel apertures; and

a plurality of organic light-emitting devices, wherein at least two organic light-emitting devices of the plurality of organic light-emitting devices for emitting a same color are disposed in each of the plurality of pixel apertures, each of the plurality of organic light-emitting devices comprises an anode and at least one organic light-emitting function layer, and anodes of the plurality of organic light-emitting devices are electrically connected to the plurality of pixel driving circuits through the plurality of connection holes in one-to-one correspondence,

wherein a plurality of grooves is provided in the planarization layer, wherein one groove of the plurality of grooves is disposed between two adjacent organic light-emitting devices of the plurality of organic light-emitting devices disposed in a respective one of the plurality of the pixel apertures;

the plurality of grooves is filled with a hydrophobic layer having a trench, an extending direction of the trench in each groove of the plurality of grooves is the same as an extending direction of said groove.

2. The organic light-emitting display panel according to claim 1, wherein a respective one of the at least one organic light-emitting function layer breaks at the trench.

3. The organic light-emitting display panel according to claim 1, wherein the hydrophobic layer has a wetting angle larger than 90°

.

4. The organic light-emitting display panel according to claim 3, wherein the wetting angle of the hydrophobic layer is 100°

.

5. The organic light-emitting display panel according to claim 1, wherein the hydrophobic layer is made of an acrylic material.

6. The organic light-emitting display panel according to claim 1, wherein each of the plurality of grooves has a depth equal to a thickness of the planarization layer in a direction perpendicular to the array substrate.

7. The organic light-emitting display panel according to claim 1, wherein the trench has a width smaller than 2 μ

m, and the trench has a depth larger than or equal to 0.5 μ

m in a direction perpendicular to the array substrate.

8. The organic light-emitting display panel according to claim 1, wherein the trench in each groove of the plurality of grooves has a depth equal to a depth of the groove in a direction perpendicular to the array substrate.

9. The organic light-emitting display panel according to claim 1, wherein the trench in each groove of the plurality of grooves has a cross-section shaped as a trapezium.

10. The organic light-emitting display panel according to claim 9, wherein the trench in each groove of the plurality of grooves has a basic angle larger than 45°

and smaller than 90°

.

11. The organic light-emitting display panel according to claim 1, wherein the anode of each organic light-emitting device of the plurality of organic light-emitting devices has an end lying on the hydrophobic layer in one corresponding groove of the plurality of grooves.

12. The organic light-emitting display panel according to claim 1, wherein each of the plurality of pixel apertures has a shape selected from a regular triangle shape, a hexagon shape, or a rectangle shape,

wherein when each of the plurality of pixel apertures has the regular triangle shape, a number of the at least two organic light-emitting devices of the plurality of organic light-emitting devices for emitting a same color disposed in each of the plurality of pixel apertures is three,

wherein when each of the plurality of pixel apertures has the hexagon shape, a number of the at least two organic light-emitting devices of the plurality of organic light-emitting devices for emitting a same color disposed in each of the plurality of pixel apertures is six, and

wherein when each of the plurality of pixel apertures has the rectangle shape, a number of the at least two organic light-emitting devices of the plurality of organic light-emitting devices for emitting a same color disposed in each of the plurality of pixel apertures is four.

13. An organic light-emitting display device, comprising an organic light-emitting display panel, wherein the organic light-emitting display panel comprises:

an array substrate;

a plurality of pixel driving circuits disposed on the array substrate;

a planarization layer disposed on the array substrate, wherein a plurality of connection holes corresponding to the plurality of pixel driving circuits is provided in the planarization layer;

a pixel defining layer disposed on the planarization layer, wherein the pixel defining layer comprises a plurality of pixel apertures; and

a plurality of organic light-emitting devices, wherein at least two organic light-emitting devices of the plurality of organic light-emitting devices for emitting a same color are disposed in each of the plurality of pixel apertures, each of the plurality of organic light-emitting devices comprises an anode and at least one organic light-emitting function layer, and anodes of the plurality of organic light-emitting devices are electrically connected to the plurality of pixel driving circuits through the plurality of connection holes in one-to-one correspondence,

wherein a plurality of grooves is provided in the planarization layer, wherein one groove of the plurality of grooves is disposed between two adjacent organic light-emitting devices of the plurality of organic light-emitting devices disposed in a respective one of the plurality of the pixel apertures;

the plurality of grooves is filled with a hydrophobic layer having a trench, an extending direction of the trench in each groove of the plurality of grooves is the same as an extending direction of said groove.

14. A manufacturing method for an organic light-emitting display panel, comprising:

providing an array substrate on which a plurality of pixel driving circuits is provided;

forming a planarization layer on the array substrate;

forming, in the planarization layer, a plurality of connection holes corresponding to the plurality of pixel driving circuits;

forming a plurality of grooves in the planarization layer;

filling each of the plurality of grooves with a hydrophobic material to form a hydrophobic layer;

forming a trench in the hydrophobic layer;

forming a plurality of anodes included by a plurality of organic light-emitting devices, wherein the plurality of anodes is electrically connected to the plurality of pixel driving circuits through the plurality of connection holes in one-to-one correspondence;

forming a pixel defining layer on the array substrate having the plurality of anodes, wherein the pixel defining layer comprises a plurality of pixel apertures, and each of the plurality of pixel apertures corresponds to at least two of the plurality of organic light-emitting devices; and

forming at least one organic light-emitting function layer of each of the plurality of organic light-emitting devices by means of ink-jet printing,

wherein at least two of the plurality of organic light-emitting devices for emitting a same color are disposed in each of the plurality of pixel apertures, and wherein one of the plurality of grooves is disposed between two adjacent organic light-emitting devices of the plurality of organic light-emitting devices disposed in a respective one of the plurality of the pixel apertures, and an extending direction of the trench in each groove of the plurality of grooves is the same as an extending direction of said groove.

15. The manufacturing method according to claim 14, wherein a respective one of the at least one organic light-emitting function layer breaks at the trench.

16. The manufacturing method according to claim 14, wherein the plurality of connection holes and the plurality of grooves are formed on the planarization layer in one process step, and following the process step, the hydrophobic material is filled in each of the plurality of grooves to form the hydrophobic layer and the trench is formed in the hydrophobic layer in each of the plurality of grooves;

and then, the plurality of anodes included by the plurality of organic light-emitting devices are formed, wherein each of the plurality of anodes has an end lying on the hydrophobic layer in one corresponding groove of the plurality of grooves.

17. The manufacturing method according to claim 14,

wherein after the plurality of connection holes corresponding to the plurality of pixel driving circuits is formed in the planarization layer, the plurality of anodes included by the plurality of organic light-emitting devices is formed, wherein the plurality of anodes is electrically connected to the plurality of pixel driving circuits through the plurality of connection holes in one-to-one correspondence, and thereafter the plurality of grooves are formed in the planarization layer.

18. The manufacturing method according to claim 14, wherein filling each of the plurality of grooves with a hydrophobic material to form a hydrophobic layer comprises:

forming a layer of hydrophobic material on the planarization layer, and maintaining only the hydrophobic material filled in the plurality of grooves by means of a patterning process.

19. The manufacturing method according to claim 14, wherein filling each of the plurality of grooves with a hydrophobic material to form a hydrophobic layer comprises:

filling each of the plurality of grooves with the hydrophobic material by means of ink-jet printing.