Organic display device

Patent metadata

Field	Value
Publication number	US-12444350-B2
Application number	US-202217837432-A
Country	US
Kind code	B2
Filing date	Jun 10, 2022
Priority date	Jun 10, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

The present application provides an organic display device, which comprising a light sensing device and an organic light emitting diode display panel, based on the organic light emitting diode display panel disposed on the light sensing device, and first and second light sensing regions disposed on the light sensing device, and first and second filtering devices further disposed on the first and second light sensing regions, the light sensing device senses an ambient signal passing through the organic light emitting diode display panel, the first and second filtering devices, and a display signal generated from the organic light emitting diode display panel and passing through the first and second filtering devices. Thereby, the ambient light signal and display light signal are sensed by a light sensing manner under the display panel (under display sensing).

First claim

The invention claimed is:

1. An organic display device, comprising:
a light sensing device, including a first light sensing region and a second light sensing region, further including a first light filtering device disposed on said first light sensing region and further including a second light filtering device disposed on said second light sensing region, said first light filtering device and said second light filtering device have first and second circular polarization angles while said first light filtering device includes a first wave plate and a first polarization sheet, said second light filtering device includes a second wave plate and a second polarization sheet, and said first wave plate and said second wave plate are phase delay sheets;
an organic light-emitting diode display panel, disposed on said light sensing device, generating a display light signal; and
an operational circuit, coupled to said light sensing device, receiving a first light sensing signal and a second light sensing signal from said light sensing device, said first light sensing signal and said second light sensing signal corresponding to a light sensing matrix, said operational circuit acquiring an ambient light sensing value corresponding to an ambient light intensity of an ambient light signal according to said light sensing matrix, said first light sensing signal and said second light sensing signal,
wherein said first light sensing region and said second light sensing region sense a first ambient filtered light and a second ambient filtered light while said ambient light signal is passing through said organic light-emitting diode display panel, said first light filtering device, and said second light filtering device, based on said first circular polarization angle and said second circular polarization angle;
wherein said first light sensing region and said second light sensing region sense a first display filtered light and a second display filtered light while said display light signal is passing through said first light filtering device and said second light filtering device, based on said first circular polarization angle and said second circular polarization angle;
wherein said first light sensing region generates said first light sensing signal according to said first ambient filtered light and said first display filtered light, and said first light sensing signal is indicative of said first ambient filtered light and said first display filtered light received sensed by said first sensing region;
wherein said second sensing region generates said second light sensing signal according to said second ambient filtered light and said second display filtered light, and said second light sensing signal is indicative of said second ambient filtered light and said second display filtered light sensed by said second sensing region; and
wherein said ambient light sensing value and said ambient light intensity of said ambient light signal correspond to a light intensity of said display light signal adjusted by said organic light-emitting diode display panel.

2. The organic display device of claim 1 , wherein a first ambient light sensing coefficient of said first light sensing signal is greater than a second ambient light sensing coefficient of said second light sensing signal.

3. The organic display device of claim 2 , wherein said first ambient light sensing coefficient and said second ambient light sensing coefficient are not equal to zero.

4. The organic display device of claim 1 , wherein a first ambient light sensing coefficient of said first light sensing signal is different from a second ambient light sensing coefficient of said second light sensing signal.

5. The organic display device of claim 4 , wherein said first ambient light sensing coefficient and said second ambient light sensing coefficient are not equal to zero.

6. The organic display device of claim 1 , wherein the material of said first polarization sheet and said second polarization sheet is selected from polyvinyl alcohol; and the material of said first wave plate and said second wave plate is selected from birefringent polymers.

7. The organic display device of claim 1 , wherein a first circular polarization direction of said first light filtering device is identical to a panel circular polarization direction of said organic light-emitting diode display panel; a second circular polarization direction of said second light filtering device is different from said panel circular polarization direction.

8. The organic display device of claim 1 , wherein said operational circuit acquires an error according to said ambient light sensing value and said ambient light intensity of said ambient light signal, and said organic light-emitting diode display panel adjusting said light intensity of said display light signal according to said error.

9. The organic display device of claim 1 , further comprising a gel member, disposed between said organic light-emitting diode display panel and said light sensing device, and packaging said first light filtering device and said second light filtering device.

Assignees

• Sensortek Tech Corp

Inventors

• Hsu Han-Chung

Classifications

• H10K59/13

  comprising photosensors that control luminance · CPC title

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2360/144

  the light being ambient light · CPC title

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G3/3208 Primary

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