Display panel and temperature regulation method therefor

Patent metadata

Field	Value
Publication number	US-12369482-B2
Application number	US-202117623599-A
Country	US
Kind code	B2
Filing date	Dec 23, 2021
Priority date	Dec 16, 2021
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A display panel and a temperature regulation method for a display panel are provided. The display includes a substrate, a thin film transistor layer, a first passivation layer, a photoelectric detector, a first light-shielding layer, and a second light-shielding layer. The first light-shielding layer is disposed on one side of the photoelectric detector away from the substrate. The second light-shielding layer is disposed on the lateral of the photoelectric detector.

First claim

What is claimed is:

1. A display panel comprising:
a substrate;
a thin film transistor layer disposed on the substrate;
a first planarization layer disposed on a side of the thin film transistor layer away from the substrate;
a photoelectric detector comprising:
a first electrode disposed on a side of the first planarization layer away from the substrate;
an active layer disposed on a side of the first electrode away from the substrate; and
a second electrode disposed on a side of the active layer away from the substrate;

a first light-shielding layer covering the side of the active layer away from the substrate; and
a second light-shielding layer disposed on the side of the first electrode away from the substrate, the second light-shielding layer being provided with a first opening at a position corresponding to the first electrode,
wherein the active layer is disposed in the first opening.

2. The display panel of claim 1 , further comprising:
an anode disposed on the side of the first planarization layer away from the substrate;
a pixel definition layer disposed on a side of the anode away from the substrate, the pixel definition layer being provided with a second opening at a position corresponding to the anode;
a light-emitting layer disposed on the side of the anode away from the substrate in the second opening; and
a cathode disposed on a side of the light-emitting layer away from the substrate,
wherein the anode and the first electrode are opaque electrodes.

3. The display panel of claim 2 , wherein the second electrode is a transparent electrode, and the first light-shielding layer is disposed on a side of the second electrode away from the substrate.

4. The display panel of claim 2 , wherein the second electrode is an opaque electrode, and the second electrode is multiplexed as the first light-shielding layer.

5. The display panel of claim 3 , wherein the anode is disposed on a side of the photoelectric detector away from the substrate.

6. The display panel of claim 5 , further comprising:
a protective layer, disposed between the second electrode and the anode and extending to cover a side of the second light-shielding layer away from the substrate; and
a second planarization layer, disposed between the protective layer and the anode.

7. The display panel of claim 6 , wherein an orthographic projection of the photoelectric detector on the substrate is spaced apart from an orthographic projection of the anode on the substrate, and the protective layer is disposed between the first light-shielding layer and the anode.

8. The display panel of claim 6 , wherein an orthographic projection of the photoelectric detector on the substrate is within an orthographic projection of the anode on the substrate, and the anode is multiplexed as the first light-shielding layer.

9. The display panel of claim 3 , wherein the anode and the first electrode are disposed in a same layer.

10. The display panel of claim 9 , wherein the cathode is multiplexed as the second electrode.

11. The display panel of claim 9 , wherein the pixel definition layer is composed of a light-shielding material, and the pixel definition layer is multiplexed as the second light-shielding layer.

12. The display panel of claim 1 , wherein the thin film transistor layer comprises:
a first thin film transistor device comprising:
a first source electrically connected to the first electrode of the photoelectric detector; and
a first drain electrically connected to a control chip.

13. The display panel of claim 1 , wherein the photoelectric detector further comprises:
a first transmission layer, disposed between the first electrode and the active layer; and
a second transmission layer, disposed between the active layer and the second electrode.

14. The display panel of claim 1 , further comprising:
a buffer layer, disposed between the substrate and the thin film transistor layer.

15. A temperature regulation method for a display panel, comprising:
obtaining dark current values of a photoelectric detector at different temperatures to obtain a temperature-current fitting curve;
obtaining a real-time dark current value of the photoelectric detector through a first thin film transistor device;
obtaining a real-time temperature value corresponding to the real-time dark current value from the temperature-current fitting curve according to the real-time dark current value; and
in response to determining that the real-time temperature value exceeds a preset temperature range, performing temperature regulation,
wherein the display panel comprises:
a substrate;
a thin film transistor layer disposed on the substrate;
a first planarization layer disposed on a side of the thin film transistor layer away from the substrate;
the photoelectric detector comprising:
a first electrode disposed on a side of the first planarization layer away from the substrate;
an active layer disposed on a side of the first electrode away from the substrate; and
a second electrode disposed on a side of the active layer away from the substrate;

a first light-shielding layer covering the side of the active layer away from the substrate; and
a second light-shielding layer disposed on the side of the first electrode away from the substrate, the second light-shielding layer being provided with a first opening at a position corresponding to the first electrode,
wherein the active layer is disposed in the first opening.

16. The temperature regulation method of claim 15 , wherein the display panel further comprises:
an anode disposed on the side of the first planarization layer away from the substrate;
a pixel definition layer disposed on a side of the anode away from the substrate, the pixel definition layer being provided with a second opening at a position corresponding to the anode;
a light-emitting layer disposed on the side of the anode away from the substrate in the second opening; and
a cathode disposed on a side of the light-emitting layer away from the substrate,
wherein the anode and the first electrode are opaque electrodes.

17. The temperature regulation method of claim 16 , wherein the second electrode is a transparent electrode, and the first light-shielding layer is disposed on a side of the second electrode away from the substrate.

18. The temperature regulation method of claim 16 , wherein the second electrode is an opaque electrode, and the second electrode is multiplexed as the first light-shielding layer.

19. The temperature regulation method of claim 17 , wherein the anode is disposed on a side of the photoelectric detector away from the substrate.

20. The temperature regulation method of claim 19 , wherein the display panel further comprises:
a protective layer, disposed between the second electrode and the anode and extending to cover a side of the second light-shielding layer away from the substrate; and
a second planarization layer, disposed between the protective layer and the anode.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Liu Shengze
• Ruan Chongpeng
• Zhang Chunpeng
• Xianyu Wenxu

Classifications

• G05D23/2034

  the sensing element being a semiconductor · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/122

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

• H10K59/13

  comprising photosensors that control luminance · CPC title

• G05D23/19

  characterised by the use of electric means {(G05D23/1393 takes precedence)} · CPC title