OLED panel and brightness compensation method thereof, display device

Patent metadata

Field	Value
Publication number	US-10811481-B2
Application number	US-201816235194-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Jan 9, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

The present disclosure provides an OLED panel comprising: a first substrate; an OLED device on the first substrate; an optical detecting device configured to detect a luminance of the OLED device; and a processor configured to generate a control signal according to brightness information of the OLED device detected by the optical detecting device so as to adjust brightness of the OLED device.

First claim

The invention claimed is:

1. An OLED panel comprising: a first substrate, and an OLED device on the first substrate, wherein the OLED panel further comprises:
an optical detecting device, which is configured to detect a luminance of the OLED device; and
a processor, which is configured to generate a control signal according to brightness information of the OLED device detected by the optical detecting device so as to adjust brightness of the OLED device,
wherein the optical detecting device has a plurality of photoelectric sensors, the OLED device has a plurality of pixel groups, each of the plurality of photoelectric sensors is corresponding to each of the plurality of pixel groups respectively,
wherein the processor comprises:
a data processor, which is configured to generate the control signal according to brightness information of the OLED device detected by the optical detecting device; and
an illumination controller, which is configured to adjust brightness of the OLED device according to the control signal,
wherein the OLED panel further comprises a second substrate disposed opposite to the first substrate, and a semi-transflective membrane is disposed on the second substrate; wherein a part of light emitted by the OLED device passes through the semi-transflective membrane, and another part of light is reflected by the semi-transflective membrane to the optical detecting device.

2. The OLED panel according to claim 1 , wherein the optical detecting device is a transparent optical device located on a luminous-surface side of the OLED device, and an orthographic projection of the optical detecting device on the first substrate is at least partially coincident with an orthographic projection of the OLED device on the first substrate.

3. The OLED panel according to claim 2 , wherein the orthographic projection of the optical detecting device on the first substrate covers the orthographic projection of the OLED device on the first substrate.

4. The OLED panel according to claim 1 , wherein the optical detecting device comprises a PIN photoelectric conversion device made of graphene or a-Si as an intrinsic layer.

5. The OLED panel according to claim 4 , wherein the optical detecting device is disposed on a second substrate; the second substrate on which the optical detecting device is formed is disposed opposite to the first substrate on which the OLED device is formed.

6. The OLED panel according to claim 1 , wherein an angle between a plane of the semi-transflective membrane and an extending direction of a plane of the first substrate is 45°.

7. The OLED panel according to claim 6 , wherein an orthographic projection of the optical detecting device on the first substrate does not overlap with an orthographic projection of the OLED device on the first substrate.

8. The OLED panel according to claim 1 , wherein the optical detecting device is disposed on the first substrate and alternately disposed with the OLED device; the OLED panel further comprises a light guide plate; wherein light emitted by the OLED device is conducted to the optical detecting device via the light guide plate.

9. The OLED panel according to claim 8 , wherein a second luminous dot is disposed opposite to the optical detecting device, on a side of the light guide plate facing the first substrate.

10. The OLED panel according to claim 8 , wherein a second luminous dot is disposed on a side of the light guide plate facing away from the first substrate.

11. A brightness compensation method of an OLED panel according to claim 1 ,
wherein the brightness compensation method comprises:
detecting the luminance of the OLED device by the optical detecting device; and
generating the control signal by the processor according to brightness information of the OLED device detected by the optical detecting device, and adjusting brightness of the OLED device according to the control signal.

12. A display device comprising an OLED panel according to claim 1 .

Assignees

• Beijing Boe Display Tech Co
• Boe Technlogy Group Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Hu Weipin
• Bu Qianqian
• Qiu Yun
• Wei Congcong
• Liu Sha
• Sun Xiao
• Wang Chun
• Jiang Mingxiao
• Zhao Hebin
• Qu Lianjie
• Yang Ruizhi

Classifications

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/13

  comprising photosensors that control luminance · CPC title

• G09G2360/141

  the light conveying information used for selecting or modulating the light emitting or modulating element · CPC title

• G09G2360/147

  the originated light output being determined for each pixel · CPC title