Display panels, display screens, and display devices

Patent metadata

Field	Value
Publication number	US-11632891-B2
Application number	US-202117345767-A
Country	US
Kind code	B2
Filing date	Jun 11, 2021
Priority date	Apr 25, 2019
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

A display panel, a display screen, and a display device are provided. The display panel includes a display substrate; a light-emitting layer located on the display substrate and comprising a plurality of light-emitting units; an encapsulation structure disposed on the light-emitting layer to encapsulate the light-emitting layer; and a visible light conversion layer configured to receive visible lights and convert the visible lights into non-visible lights; wherein the visible light conversion layer is disposed in the encapsulation structure or the display substrate.

First claim

What is claimed is:

1. A display panel comprising
a display substrate comprising a pixel-defining layer;
a light-emitting layer located on the display substrate and comprising a plurality of light-emitting units, the plurality of light-emitting units comprising a first light-emitting unit and a second light-emitting unit;
an encapsulation structure disposed on the light-emitting layer to encapsulate the light-emitting layer;
a visible light conversion layer configured to receive a visible light emitted by the second light-emitting unit and convert the visible light into a non-visible light; and
a protection layer covering the visible light conversion layer and located between the visible light conversion layer and the pixel-defining layer;
wherein the visible light conversion layer is disposed corresponding to the second light-emitting unit, and an area of the visible light conversion layer is substantially equal to an area of the second light-emitting unit.

2. The display panel of claim 1 , wherein the visible light conversion layer is an infrared quantum dot layer.

3. The display panel of claim 1 , wherein the visible light conversion layer is configured to receive the visible light emitted by the second light-emitting unit, convert the visible light into the non-visible light, and allow the non-visible light to be transmitted towards a displaying surface of the display panel.

4. The display panel of claim 1 , wherein the visible light conversion layer is configured to receive the visible light emitted by the second light-emitting unit and then reflected by a fingerprint, convert the visible light into the non-visible light, and allow the non-visible light to be transmitted towards a side away from a displaying surface of the display panel.

5. The display panel of claim 3 , wherein the first light-emitting unit is configured for displaying and the second light-emitting unit is configured for providing the visible light to the visible light conversion layer, and the visible light conversion layer is configured to receive the visible light emitted by the second light-emitting unit and convert the visible light into the non-visible light which is to be reflected by a fingerprint and receivable by a fingerprint identification module.

6. The display panel of claim 5 , wherein an orthographic projection of the visible light conversion layer on the display substrate coincides with an orthographic projection of the second light-emitting unit on the display substrate.

7. The display panel of claim 5 , wherein each pixel unit in a fingerprint identification area of the display panel comprises one second light-emitting unit.

8. The display panel of claim 1 , wherein the display substrate comprises a pixel-defining layer configured to isolate the plurality of light-emitting units from each other, the visible light conversion layer is disposed corresponding to an area of the pixel-defining layer, and the visible light conversion layer is configured to receive the visible light emitted by the second light-emitting unit and then reflected by a fingerprint and convert the visible light into the non-visible light receivable by a fingerprint identification module.

9. The display panel of claim 8 , wherein an orthographic projection of the visible light conversion layer on the display substrate is within an orthographic projection of a top surface of the pixel-defining layer on the display substrate.

10. The display panel of claim 1 , wherein the encapsulation structure comprises multiple encapsulation layers laminated with each other, and the visible light conversion layer is located between two adjacent encapsulation layers.

11. A display screen, comprising the
display panel of claim 1
and

a fingerprint identification module,
wherein the fingerprint identification module is located at a side of the display panel, away from a displaying surface of the display panel.

12. The display screen of claim 11 , wherein the fingerprint identification module comprises a fingerprint sensor array layer comprising a plurality of fingerprint sensors arranged in an array, when a finger contacts the display panel, a fingerprint of the finger and each of the fingerprint sensors constitute a fingerprint capacitance.

13. The display screen of claim 12 , wherein the fingerprint identification module further comprises a collimating layer disposed between the fingerprint sensor array layer and the display substrate, and the collimating layer comprises a plurality of collimators.

14. The display screen of claim 11 , wherein the fingerprint identification module is at least disposed at an area corresponding to the visible light conversion layer.

15. The display panel of claim 1 , wherein the visible light conversion layer is disposed in the encapsulation structure.

16. A display panel, comprising:
a display substrate;
a light-emitting layer located on the display substrate and comprising a plurality of light-emitting units;
an encapsulation structure disposed on the light-emitting layer to encapsulate the light-emitting layer;
a visible light conversion layer configured to receive a visible light and convert the visible light into a non-visible light; and
a protection layer covering the visible light conversion layer and located between the visible light conversion layer and the pixel-defining layer;
wherein the display substrate comprises a base substrate, a planarization layer disposed on the base substrate, and a pixel-defining layer disposed on the planarization layer and configured to isolate the plurality of light-emitting units from each other; the visible light conversion layer is located between the pixel-defining layer and the planarization layer, and the visible light conversion layer is configured to receive a visible light emitted by the light-emitting layer and then reflected by a fingerprint, and convert the visible light into a non-visible light receivable by a fingerprint identification module.

17. The display panel of claim 16 , wherein the protection layer is a silicon nitride layer.

18. The display panel of claim 16 , wherein the visible light conversion layer covers an entire displaying area of the display panel.

19. The display panel of claim 16 , wherein an orthographic projection of the visible light conversion layer on the base substrate covers an orthographic projection of the light-emitting layer on the base substrate.

Assignees

• Yungu Guan Tech Co Ltd

Inventors

• Sun Jianming

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• G06V40/1318 Primary

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• H10F77/496

  Luminescent members, e.g. fluorescent sheets (wavelength conversion means for photovoltaic cells H10F77/45) · CPC title