Display panel with high stability

• US 10,886,356 B2
• Filed: 04/25/2019
• Issued: 01/05/2021
• Est. Priority Date: 08/30/2018
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Lu, Pengcheng, Huang, Kuanta, Chen, Xiaochuan, Yang, Shengji, Wang, Hui, Wang, Yanming, Wang, Weihai, Qin, Guohong, Shi, Rongrong, Song, Yage, Li, Jiantong
• Primary Examiner(s): Hoque, Mohammad M
• Application Number:
  US16/394,254
• Publication Number:
  US 20200075706A1
• Time in Patent Office: 621 Days
• Field of Search: 257 40
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/805 Electrodes

Abstract

A display panel includes a base substrate, a first electrode contact portion, a light emitting layer, and a first electrode. The first electrode contact portion is disposed on the base substrate and surrounding a display area, and is separated from the display area by an isolation area. The light emitting layer covers the display area and at least a portion of the isolation area, and extends at least partially to an inner edge of the first electrode contact portion or a surface of the first electrode contact portion away from the base substrate. The first electrode is disposed on the light emitting layer and a portion of the first electrode contact portion that is not covered by the light emitting layer.

Claims

1. A display panel having a display area, wherein the display panel comprises:

a base substrate;

a first electrode contact portion disposed on the base substrate and surrounding the display area, the first electrode contact portion being separated from the display area by an isolation area; and

a light emitting layer covering the display area and at least a portion of the isolation area, the light emitting layer extending at least partially to an inner edge of the first electrode contact portion or a surface of the first electrode contact portion away from the base substrate, the light emitting layer comprising;

a light emitting layer body covering the display area and a portion of the isolation area, an edge of the light emitting layer body being in the isolation area; and

at least one convex portion extending to the inner edge of the first electrode contact portion or the surface of the first electrode contact portion away from the base substrate, wherein a length of an edge of the light emitting layer body connected to the at least one convex portion is 50% of a length of an edge of the light emitting layer body, and a width of a portion of the light emitting layer covering the first electrode contact portion is uniform; and

a first electrode disposed on the light emitting layer and a portion of the first electrode contact portion that is not covered by the light emitting layer.

2. The display panel according to claim 1, wherein:

the light emitting layer extends partially to a surface of the first electrode contact portion away from the base substrate;

a direction in which the first electrode contact portion is away from the display area is a first direction; and

a width of the portion the light emitting layer covering the first electrode contact portion in the first direction is smaller than a width of the surface of the first electrode contact portion away from the base substrate in the first direction.

3. The display panel according to claim 2, wherein a width of a portion of the light emitting layer covering the first electrode contact portion in the first direction is 50% of the width of the surface of the first electrode contact portion away from the base substrate in the first direction.

4. The display panel according to claim 1, wherein the at least one convex portion is one of a plurality of convex portions connected to the edge of the light emitting layer body at intervals.

5. The display panel according to claim 1, wherein:

the display area is circular, and the first electrode contact portion is a circle concentric with the display area;

an orthographic projection of the light emitting layer body on the base substrate is a circle concentric with the display area; and

an orthographic projection of the at least one convex portion on the base substrate is a fan shape centered on a center of the display area, and an outer radius of the convex portion is smaller than an outer radius of the first electrode contact portion and not smaller than an inner radius of the first electrode contact portion.

6. The display panel according to claim 5, wherein the at least one convex portion is one of a plurality of convex portions evenly distributed along an edge of a body of the light emitting layer.

7. The display panel according to claim 1, wherein:

the display area is rectangular, and the first electrode contact portion is a rectangular ring concentric with the display area;

a projection of the light emitting layer body on the base substrate is a rectangle concentric with the display area; and

an orthographic projection of the at least one convex portion on the base substrate is a rectangle, and an edge of the at least one convex portion away from the light emitting layer body is located at the surface of the first electrode contact portion away from the base substrate.

8. The display panel according to claim 7, wherein a number of the convex portions is four, and the four convex portions are connected to four sides of the light emitting layer body in a one-to-one correspondence.

9. The display panel according to claim 7, wherein each of the convex portions is connected between an end point and a midpoint of a side of the corresponding light emitting layer body.

10. The display panel according to claim 1, wherein the base substrate is a silicon-based substrate.

11. The display panel according to claim 1, wherein the display panel is an OLED display panel.

12. A display device comprising a display panel, the display panel comprising:

a base substrate;

a first electrode contact portion disposed on the base substrate and surrounding a display area, the first electrode contact portion being separated from the display area by an isolation area; and

a light emitting layer covering the display area and at least a portion of the isolation area, the light emitting layer extending at least partially to an inner edge of the first electrode contact portion or a surface of the first electrode contact portion away from the base substrate, the light emitting layer comprising;

a light emitting layer body covering the display area and a portion of the isolation area, an edge of the light emitting layer body being in the isolation area; and

at least one convex portion extending to the inner edge of the first electrode contact portion or the surface of the first electrode contact portion away from the base substrate, wherein a length of an edge of the light emitting layer body connected to the at least one convex portion is 50% of a length of an edge of the light emitting layer body, and a width of a portion of the light emitting layer covering the first electrode contact portion is uniform; and

a first electrode disposed on the light emitting layer and a portion of the first electrode contact portion that is not covered by the light emitting layer.

13. The display device according to claim 12, wherein:

the light emitting layer extends partially to a surface of the first electrode contact portion away from the base substrate;

a direction in which the first electrode contact portion is away from the display area is a first direction; and

a width of the portion the light emitting layer covering the first electrode contact portion in the first direction is smaller than a width of the surface of the first electrode contact portion away from the base substrate in the first direction.

14. The display device according to claim 13, wherein a width of a portion of the light emitting layer covering the first electrode contact portion in the first direction is 50% of the width of the surface of the first electrode contact portion away from the base substrate in the first direction.

15. The display device according to claim 12, wherein the light emitting layer comprises:

a light emitting layer body covering the display area and a portion of the isolation area, and an edge of the light emitting layer body is in the isolation area; and

at least one convex portion extending to the inner edge of the first electrode contact portion or the surface of the first electrode contact portion away from the base substrate.

16. The display device according to claim 15, wherein a length of an edge of the light emitting layer body connected to the at least one convex portion is 50% of a length of an edge of the light emitting layer body.

17. The display device according to claim 15, wherein the at least one convex portion is one a plurality of convex portions connected to the edge of the light emitting layer body at intervals.