Display substrate, display panel and display device

Patent metadata

Field	Value
Publication number	US-12004385-B2
Application number	US-202017418814-A
Country	US
Kind code	B2
Filing date	Nov 13, 2020
Priority date	Nov 26, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

Provided is a display substrate including a substrate, and a light-emitting device and an optical compensation structure which are located on the substrate. The optical compensation structure includes a photoelectric sensor, a transistor and a capacitor, and the photoelectric sensor is electrically connected to the transistor and the capacitor respectively. The photoelectric sensor includes a first electrode, a photosensitive layer located on a side of the first electrode distal from the substrate, and a second electrode located on a side of the photosensitive layer distal from the substrate; the transistor includes a source electrode, a drain electrode, a gate electrode and an active layer; and the capacitor includes a first electrode plate and a second electrode plate located on a side of the first electrode plate distal from the substrate.

First claim

What is claimed is:

1. A display substrate, comprising:
a substrate; and
a light-emitting device and an optical compensation structure which are located on the substrate, wherein
the optical compensation structure comprises a photoelectric sensor, a transistor and a capacitor, and the photoelectric sensor is electrically connected to the transistor and the capacitor respectively;
the photoelectric sensor comprises a first electrode, a photosensitive layer located on a side of the first electrode distal from the substrate, and a second electrode located on a side of the photosensitive layer distal from the substrate; the transistor comprises a source electrode, a drain electrode, a gate electrode and an active layer; the capacitor comprises a first electrode plate and a second electrode plate located on a side of the first electrode plate distal from the substrate; and
neither an orthographic projection of the source electrode onto the substrate nor an orthographic projection of the drain electrode onto the substrate overlaps with an orthographic projection of the first electrode plate onto the substrate, and both the orthographic projection of the source electrode onto the substrate and the orthographic projection of the drain electrode onto the substrate overlap with an orthographic projection of the first electrode onto the substrate;
wherein the display substrate further comprises a color filter layer located between the light-emitting device and the photoelectric sensor, and an orthographic projection of the color filter layer onto the substrate does not overlap with an orthographic projection of the photoelectric sensor onto the substrate.

2. The display substrate according to claim 1 , wherein an orthographic projection of the active layer onto the substrate overlaps with an orthographic projection of the photosensitive layer onto the substrate.

3. The display substrate according to claim 2 , wherein the orthographic projection of the active layer onto the substrate is within the orthographic projection of the photosensitive layer onto the substrate.

4. The display substrate according to claim 1 , wherein the source electrode, the drain electrode and the first electrode plate are located in a same layer.

5. The display substrate according to claim 1 , wherein the first electrode and the second electrode plate are located in a same layer.

6. The display substrate according to claim 1 , further comprising:
an insulating layer located on a side of the photoelectric sensor proximal to the substrate, the insulating layer comprising a first passivation layer, a planarizing layer located on a side of the first passivation layer distal from the substrate, and a second passivation layer located on a side of the planarizing layer distal from the substrate.

7. The display substrate according to claim 6 , wherein the transistor is located on a side of the insulating layer proximal to the substrate, a contact hole is defined in the insulating layer, and the first electrode and the source electrode are electrically connected through the contact hole.

8. The display substrate according to claim 6 , wherein a material of the planarizing layer is one selected from a Silicon On Glass (SOG) material or a resin.

9. The display substrate according to claim 8 , wherein the material of the planarizing layer is the SOG material, and the second passivation layer covers a surface of a side of the planarizing layer distal from the substrate and a side wall of the planarizing layer.

10. The display substrate according to claim 6 , wherein an orthographic projection of the photoelectric sensor onto the substrate is within an orthographic projection of the planarizing layer onto the substrate.

11. The display substrate according to claim 1 , wherein an orthographic projection of the photosensitive layer onto the substrate is within the orthographic projection of the first electrode onto the substrate.

12. The display substrate according to claim 1 , wherein an orthographic projection of the second electrode onto the substrate is within an orthographic projection of the photosensitive layer onto the substrate.

13. The display substrate according to claim 1 , wherein the light-emitting device is located on a side of the photoelectric sensor distal from the substrate, and the light-emitting device comprises an anode, an insulating layer is provided between the second electrode and the anode, and a through hole is defined in the insulating layer; and
the display substrate further comprises a lead wire, the lead wire and the anode are located in a same layer, and one end of the lead wire is electrically connected to the second electrode through the through hole.

14. A display panel, comprising the display substrate according to claim 1 .

15. A display device, comprising the display panel according to claim 14 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Han Ying
• Lin Yicheng
• Xu Pan
• Zhang Xing
• Gao Zhan
• Yan Guang

Classifications

• H10K59/13 Primary

  comprising photosensors that control luminance · CPC title

• H10K59/60 Primary

  OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title