Active optical component light emission control method

Patent metadata

Field	Value
Publication number	US-11688346-B2
Application number	US-202117481797-A
Country	US
Kind code	B2
Filing date	Sep 22, 2021
Priority date	Mar 22, 2019
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

An electronic device includes a display screen, a display control circuit, an active optical component, and an optical control circuit. The active optical component is located below the display screen. The display control circuit is configured to control refreshing of the display screen, and output a synchronization signal to the optical control circuit. The optical control circuit is configured to receive the synchronization signal, and control the active optical component to start light emission after a predetermined first delay that is after a moment corresponding to the synchronization signal to enable the display control circuit to refresh to one row of at least one row on the display screen corresponding to the active optical component after a predetermined second delay that is after the active optical component completes light emission.

First claim

What is claimed is:

1. An electronic device, comprising:
a display screen comprising at least one row of pixels;
an optical control circuit;
an active optical component located below the display screen, coupled to the optical control circuit, and corresponding to a first row of the at least one row; and
a display control circuit coupled to the display screen and the optical control circuit and configured to:
refresh the display screen; and
output a synchronization signal to the optical control circuit,

wherein the optical control circuit is configured to:
receive the synchronization signal; and
control the active optical component to start light emission after a first delay that is after a first moment corresponding to the synchronization signal,

wherein the active optical component is configured to complete the light emission, and
wherein the display control circuit is further configured to refresh to the first row after a second delay that is after the active optical component completes the light emission.

2. The electronic device of claim 1 , wherein the second delay is greater than or equal to a duration (Tmin) and is less than a sensitivity (Tmax) of human eyes to recognize an object, and wherein Tmin is for restoring a pixel of the display screen to a normal electrical characteristic after the pixel is irradiated by light emitted by the active optical component.

3. The electronic device of claim 1 , wherein the synchronization signal comprises a frame synchronization signal, and wherein the optical control circuit is further configured to:
receive the frame synchronization signal; and
control, in response to receiving the frame synchronization signal, the active optical component to start the light emission and complete work after the first delay.

4. The electronic device of claim 1 , wherein the synchronization signal comprises a frame synchronization signal, and wherein the optical control circuit is further configured to:
receive row synchronization signals from the display control circuit;
receive the frame synchronization signal; and
start, in response to receiving the frame synchronization signal, to count a quantity of subsequently received row synchronization signals to control the active optical component to perform the first delay and to start the light emission and complete work after the first delay.

5. The electronic device of claim 1 , wherein the optical control circuit is further configured to control the active optical component to continuously work at a first power for a duration after the active optical component starts the light emission.

6. The electronic device of claim 1 , wherein a first duration is equal to a sum of the first delay, the second delay, and a second duration from a second moment when the active optical component starts the light emission to a third moment when the active optical component completes the light emission, and wherein the first duration is either less than a frame period or is greater than the frame period and less than two frame periods.

7. The electronic device of claim 1 , wherein a work period is from a second moment when the optical control circuit receives the synchronization signal to a third moment when the active optical component completes the light emission, and wherein the optical control circuit is further configured to control the active optical component to continue working for one or more work periods when the display screen is in a screen-on state.

8. The electronic device of claim 1 , wherein the display screen is an organic light-emitting diode (LED) (OLED) display screen or a micro LED display screen.

9. An optical control circuit for an electronic device, wherein the optical control circuit comprises:
a memory configured to store code; and
a processing circuit coupled to the memory and configured to execute the code to cause the optical control circuit to:
receive a synchronization signal from a display control circuit of the electronic device; and
control an active optical component of the electronic device to start light emission after a first delay that is after a first moment corresponding to the synchronization signal to enable the display control circuit to refresh to a first row of at least one row of pixels on a display screen of the electronic device corresponding to the active optical component after a second delay that is after the active optical component completes the light emission,
wherein the second delay is greater than or equal to a duration (Tmin) and is less than a sensitivity (Tmax) of human eyes to recognize an object, and wherein Tmin is for restoring a pixel of the display screen to a normal electrical characteristic after the pixel is irradiated by a light emitted by the active optical component.

10. The optical control circuit of claim 9 , wherein the synchronization signal comprises a frame synchronization signal, and wherein the processing circuit is further configured to execute the code to cause the optical control circuit to:
receive the frame synchronization signal; and
control, in response to receiving the frame synchronization signal, the active optical component to start the light emission and complete work after the first delay.

11. The optical control circuit of claim 9 , wherein the synchronization signal comprises a frame synchronization signal, and wherein the processing circuit is further configured to execute the code to cause the optical control circuit to:
receive row synchronization signals from the display control circuit;
receive the frame synchronization signal; and
start, in response to receiving the frame synchronization signal, to count a quantity of subsequently received row synchronization signals to control the active optical component to perform the first delay and to start the light emission and complete work after the first delay.

12. The optical control circuit of claim 9 , wherein the processing circuit is further configured to execute the code to cause the optical control circuit to control the active optical component to continuously work at a first power for a duration after the active optical component starts the light emission.

13. The optical control circuit of claim 9 , wherein a first duration is equal to a sum of the first delay, the second delay, and a second duration from a second moment when the active optical component starts the light emission to a third moment when the active optical component completes the light emission, and wherein the first duration is either less than a frame period or is greater than the frame period and less than two frame periods.

14. The optical control circuit of claim 9 , wherein a work period is from a second moment when the optical control circuit receives the synchronization signal to a third moment when the active optical component completes the light emission, and wherein the processing circuit is further configured to execute the code to cause the optical control circuit to control the active optical component to continue working for one or more work periods when the display screen is in a screen-on state.

15. The optical control circuit of claim 9 , wherein the display screen is an organic light-emitting diode (LED) (OLED) display screen or a micro LED display screen.

16. An active optical component control method implemented by an optical control circuit in an electronic device, wherein the active optical component control method comprises:
receiving a synchronization signal from a display control circuit of the electronic device, wherein the electronic device further comprises a di

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Minchang
• Meng Hui
• Zhao Xinyu
• Tao Jun

Classifications

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title

• G09G2370/18

  Use of optical transmission of display information · CPC title

• G09G2310/061

  for resetting or blanking · CPC title

• G09G3/3208 Primary

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

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title