Organic light-emitting display panel and manufacturing method thereof, and mask

Patent metadata

Field	Value
Publication number	US-11355575-B2
Application number	US-201916730742-A
Country	US
Kind code	B2
Filing date	Dec 30, 2019
Priority date	Jun 27, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

Provided are an organic light-emitting display panel and manufacturing method thereof, a display device and a mask. The organic light-emitting display panel includes: multiple organic light-emitting units, a photosensitive module setting area, a display area surrounding the photosensitive module, and a bezel area surrounding the display area. The display area includes a first display area and a second display area. Organic light-emitting units in the first display area share a first cathode. Organic light-emitting units in the same group in the second display area share a second cathode. Two adjacent second cathodes are separated by a first gap. The bezel area extends to the photosensitive module setting area by the first gap.

First claim

What is claimed is:

1. An organic light-emitting display panel, comprising:
a photosensitive module setting area;
a display area surrounding the photosensitive module setting area;
a bezel area surrounding the display area; and
a plurality of organic light-emitting units;
wherein the display area comprises a first display area and a second display area, wherein the plurality of organic light-emitting units comprises first organic light-emitting units in the first display area and second organic light-emitting units in the second display area;
wherein the first organic light-emitting units share a first cathode;
wherein the second organic light-emitting units comprise at least one organic light-emitting unit group, each comprising at least one organic light-emitting unit sharing a second cathode, wherein two adjacent second cathodes are spaced apart by a first gap, wherein the first gap extends to the bezel area and the photosensitive module setting area.

2. The organic light-emitting display panel of claim 1 , wherein a shape of the first gap comprises at least one of: a grid, an elongated rectangle, or a zigzag line.

3. The organic light-emitting display panel of claim 1 , further comprising: a negative-supply-voltage signal transmission line located in the bezel area,
wherein the second display area further comprises a conductive connection portion, wherein the conductive connecting portion is electrically connected to the negative-supply-voltage signal transmission line and the second cathode.

4. The organic light-emitting display panel of claim 3 , wherein each of the plurality of organic light-emitting units comprises an anode, and the conductive connecting portion and the anode are disposed in a same layer.

5. The organic light-emitting display panel of claim 3 , wherein the conductive connecting portion is electrically connected to the second cathode through a first via, and wherein the first via is located outside a light-emitting zone of each of the plurality of organic light-emitting units.

6. The organic light-emitting display panel of claim 1 , further comprising: a negative-supply-voltage signal transmission line located in the bezel area, wherein the second cathode is electrically connected to the negative-supply-voltage signal transmission line through a third via.

7. A manufacturing method of an organic light-emitting display panel, comprising:
forming a cathode layer of the organic light-emitting display panel through evaporation by using a mask, wherein the organic light-emitting display panel comprises a photosensitive module setting area, a display area surrounding the photosensitive module setting area, a bezel area surrounding the display area, and a plurality of organic light-emitting units;
wherein the mask comprises: a bezel shield part, a photosensitive-module shield part and a connecting structure, wherein the connecting structure is configured to connect the photosensitive-module shield part to a side of the bezel shield part; and the connecting structure comprises at least one opening for cathode evaporation;
wherein the display area comprises a first display area and a second display area, wherein the plurality of organic light-emitting units comprises first organic light-emitting units in the first display area and second organic light-emitting units in the second display area;
wherein the first organic light-emitting units share a first cathode, and the second organic light-emitting units comprise at least one organic light-emitting unit group, each comprising at least one organic light-emitting unit sharing a second cathode, wherein two adjacent second cathodes are spaced apart by a first gap, and wherein the first gap extends to the bezel area and the photosensitive module setting area; and
wherein during the evaporation to form the cathode layer, the photosensitive-module shield part forms the photosensitive module setting area, the connecting structure forms the second display area, and the second cathode is formed by the opening of the connecting structure, and the first cathode is formed by an opening between the bezel shield part and the photosensitive-module shield part, in an area exposed by an opening between the bezel shield part and the connecting structure.

8. The manufacturing method of claim 7 , wherein the connecting structure is in a mesh structure.

9. The manufacturing method of claim 7 , wherein each of the at least one opening is in an elongated rectangle shape.

10. The manufacturing method of claim 7 , wherein each of the at least one opening is in a zigzag shape.

Assignees

• Wuhan Tianma Micro Electronics Co Ltd

Inventors

• Cui Ruili
• Ma Yangzhao
• Zhu Jiazhu
• Wang Yongzhi
• Yuan shanfu
• Chen Yingjie
• Peng Tao
• Zhou Ruiyuan

Classifications

• H10K59/8052

  Cathodes · CPC title

• C23C14/042

  using masks · CPC title

• H01L51/0011

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L51/5221

  Electricity · mapped topic