OLED display panel and OLED display device

Patent metadata

Field	Value
Publication number	US-11631835-B2
Application number	US-202016768279-A
Country	US
Kind code	B2
Filing date	Jan 19, 2020
Priority date	Jan 23, 2019
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

The present disclosure provides an OLED display panel and an OLED display device, and belongs to the field of display technology. The OLED display panel of the present disclosure includes a base substrate and a display cover disposed opposite to each other; a polarizing layer disposed between the base substrate and the display cover; a light extraction layer disposed between the base substrate and the display cover; the OLED display panel is provided with a light exit surface, and the light extraction layer is closer to the light exit surface than the polarizing layer.

First claim

What is claimed is:

1. An OLED display panel, comprising:
a base substrate and a display cover disposed opposite to each other;
a polarizing layer disposed between the base substrate and the display cover; and
a light extraction layer disposed between the base substrate and the display cover;
wherein, the OLED display panel is provided with a light exit surface, and the light extraction layer is closer to the light exit surface than the polarizing layer;
wherein the OLED display panel further comprises at least one OLED display device having a light emitting surface, and the polarizing layer is located on a side of the light emitting surface of the OLED display device;
the OLED display device comprises a first electrode and a second electrode which is a reflection electrode, and a light emitting layer between the first electrode and the second electrode, and the first electrode is one of an anode and a cathode, and the second electrode is the other one of the anode and the cathode;
the second electrode which is the reflection electrode is farther away from the polarizing layer than the first electrode; and
a material of the light extraction layer comprises scattering particles.

2. The OLED display panel of claim 1 , wherein,
a refractive index of the light extraction layer is the same as a refractive index of the polarizing layer.

3. The OLED display panel of claim 2 , wherein,
the refractive index of the light extraction layer is 1.8-2.2.

4. The OLED display panel of claim 1 , wherein,
the scattering particles comprise silicon oxide particles.

5. The OLED display panel of claim 1 , further comprising: at least one thin film transistor, which is correspondingly coupled to the at least one OLED display device respectively to control light emission.

6. The OLED display panel of claim 1 , wherein the OLED display device is a top-emission type OLED display device; and
the OLED display device, the polarizing layer and the light extraction layer are sequentially disposed on the base substrate along a direction distal to the base substrate.

7. The OLED display panel of claim 1 , wherein the OLED display device is a bottom-emitting OLED display device; and
the light extraction layer, the polarizing layer and the OLED display device are sequentially disposed on the base substrate along a direction distal to the base substrate.

8. An OLED display device comprising the OLED display panel of claim 1 .

9. The OLED display panel of claim 5 , wherein the OLED display device is a top-emission type OLED display device; and
the OLED display device, the polarizing layer and the light extraction layer are sequentially disposed on the base substrate along a direction distal to the base substrate.

10. The OLED display panel of claim 5 , wherein the OLED display device is a bottom-emitting OLED display device; and
the light extraction layer, the polarizing layer and the OLED display device are sequentially disposed on the base substrate along a direction distal to the base substrate.

11. The OLED display device of claim 8 , wherein,
a refractive index of the light extraction layer is the same as a refractive index of the polarizing layer.

12. The OLED display device of claim 11 , wherein,
the refractive index of the light extraction layer is 1.8-2.2.

13. The OLED display device of claim 8 , wherein,
the scattering particles comprise silicon oxide particles.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wu Changyen
• Yan Guang
• Song Wenfeng
• Wang Linlin

Classifications

• H10K59/877

  comprising scattering means · CPC title

• H10K50/854

  comprising scattering means · CPC title

• H10K59/8791 Primary

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K2102/3026

  Top emission · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title