Organic light-emitting diode display substrate and display device

Patent metadata

Field	Value
Publication number	US-11637150-B2
Application number	US-202117353372-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Nov 29, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present disclosure provides an organic light-emitting diode display substrate, a method of preparing the same, and a display device. The organic light-emitting diode display substrate includes: a light-emitting layer, a light modulation layer, and a color conversion layer, in which the light-emitting layer is configured to emit first color light, the light modulation layer and the color conversion layer are arranged on different light-exiting paths of the light-emitting layer, the color conversion layer is configured to convert first color light into second color light and third color light, and the light modulation layer is configured to modulate an emergent direction of first color light.

First claim

What is claimed is:

1. An organic light-emitting diode display substrate, comprising a light-emitting layer, a light modulation layer, and a color conversion layer, wherein the light-emitting layer is configured to emit a first color light, the light modulation layer and the color conversion layer are arranged on different light-exiting paths of the light-emitting layer, the color conversion layer is configured to convert the first color light into a second color light and a third color light, and the light modulation layer is configured to modulate an emergent direction of the first color light,
wherein the light-emitting layer comprises a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit that are periodically arranged on a driving substrate and emit the first color light, the light modulation layer comprises a first light modulation unit and a second light modulation unit that are arranged on a light-exiting path of the first light-emitting unit and modulate the emergent direction of the first color light, and the color conversion layer comprises a second color conversion unit that is arranged on a light-exiting path of the second light-emitting unit and converts the first color light into the second color light and the third color conversion unit that is arranged on a light-exiting path of the third light-emitting unit and converts the first color light into the third color light, and
wherein a viewing angle characteristic of the first color light emitted by the first light modulation unit is configured to be the same as viewing angle characteristics of the second color light and the third color light emitted respectively by the second color conversion unit and the third color conversion unit.

2. The organic light-emitting diode display substrate of claim 1 , wherein the second color conversion unit and the third color conversion unit are arranged on a protective layer covering the light-emitting layer, and wherein an orthogonal projection of the second color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the second light-emitting unit on the driving substrate, an orthogonal projection of the third color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the third light-emitting unit on the driving substrate, the second light modulation unit is arranged on an overcoat covering the second color conversion unit and the third color conversion unit, and an orthogonal projection of the second light modulation unit on the driving substrate at least partially overlaps with an orthogonal projection of the first light-emitting unit on the driving substrate.

3. The organic light-emitting diode display substrate of claim 1 , further comprising a second filter unit and a third filter unit arranged on light-exiting paths of the second color conversion unit and the third color conversion unit, respectively.

4. The organic light-emitting diode display substrate of claim 1 , wherein the first color light is blue light, and the color conversion layer is a quantum dot conversion layer.

5. A display device comprising the organic light-emitting diode display substrate of claim 1 .

6. An organic light-emitting diode display substrate, comprising a light-emitting layer, a light modulation layer, and a color conversion layer, wherein the light-emitting layer is configured to emit a first color light, the light modulation layer and the color conversion layer are arranged on different light-exiting paths of the light-emitting layer, the color conversion layer is configured to convert the first color light into a second color light and a third color light, and the light modulation layer is configured to modulate an emergent direction of the first color light,
wherein the light-emitting layer comprises a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit that are periodically arranged on a driving substrate and emit the first color light, the light modulation layer comprises a first light modulation unit that is arranged on a light-exiting path of the first light-emitting unit and modulates the emergent direction of the first color light, and the color conversion layer comprises a second color conversion unit that is arranged on a light-exiting path of the second light-emitting unit and converts the first color light into the second color light and the third color conversion unit that is arranged on a light-exiting path of the third light-emitting unit and converts the first color light into the third color light, and
wherein the first light modulation unit is a laminated structure comprising a plurality of modulation layers that are stacked sequentially along a direction perpendicular to a surface of the driving substrate on which a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit are periodically arranged, each of the plurality of modulation layers comprising a matrix layer and microparticles distributed in the matrix layer, a refractive index of the matrix layer being different from a refractive index of the microparticles.

7. The organic light-emitting diode display substrate of claim 6 , wherein the first light modulation unit, the second color conversion unit, and the third color conversion unit are arranged on a protective layer covering the light-emitting layer, and wherein an orthogonal projection of the first light modulation unit on the driving substrate at least partially overlaps with an orthogonal projection of the first light-emitting unit on the driving substrate, an orthogonal projection of the second color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the second light-emitting unit on the driving substrate, and an orthogonal projection of the third color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the third light-emitting unit on the driving substrate.

8. The organic light-emitting diode display substrate of claim 6 , wherein the first light modulation unit, the second color conversion unit, and the third color conversion unit are arranged on a cover plate, and wherein an orthogonal projection of the first light modulation unit on the driving substrate at least partially overlaps with an orthogonal projection of the first light-emitting unit on the driving substrate, an orthogonal projection of the second color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the second light-emitting unit on the driving substrate, and an orthogonal projection of the third color conversion unit on the driving substrate at least partially overlaps with an orthogonal projection of the third light-emitting unit on the driving substrate.

9. The organic light-emitting diode display substrate of claim 6 , wherein the first light modulation unit is a single layer structure comprising a matrix layer and microparticles distributed in the matrix layer, a refractive index of the matrix layer being different from a refractive index of the microparticles.

10. The organic light-emitting diode display substrate of claim 9 , wherein the matrix layer has a thickness of 1 μm to 50 μm, the microparticles have an equivalent diameter of 0.025 μm to 5 μm, and a volume ratio of the microparticles to the matrix layer is 1:20 to 1:1.25.

11. The organic light-emitting diode display substrate of claim 6 , wherein the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit each comprise a first electrode, an organic material functional layer, and a se

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yan Guang
• Wu Changyen
• You Juanjuan
• Wang Linlin

Classifications

• H10K59/877

  comprising scattering means · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/38 Primary

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

• H10K2102/331

  Nanoparticles used in non-emissive layers, e.g. in packaging layer · CPC title

• H10K50/854

  comprising scattering means · CPC title