Apparatus and method for driving display based on frequency operation cycle set differently according to frequency

Patent metadata

Field	Value
Publication number	US-11069323-B2
Application number	US-202016906385-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	Jun 19, 2019
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Various embodiments disclose a method and an apparatus including a display, a memory including information on a number of duty cycles per one refresh period for emitting light by pixels of the display corresponding to each of a plurality of refresh rates of the display, and a processor, wherein the processor is configured to control the electronic device to perform an operation according to a first number of duty cycles based on the display operating at a first refresh rate, and perform an operation according to a second number of duty cycles based on the display operating at a second refresh rate, wherein the first number is less than the second number based on the first refresh rate being higher than the second refresh rate.

First claim

What is claimed is:

1. An electronic device comprising:
a display;
a memory including information on a number of duty cycles per one refresh period for emitting light by pixels of the display corresponding to each of a plurality of refresh rates of the display; and
a processor,
wherein the processor is configured to control the electronic device to:
perform an operation according to a first number of duty cycles based on the display operating at a first refresh rate; and

perform an operation according to a second number of duty cycles based on the display operating at a second refresh rate,
wherein the first number is less than the second number based on the first refresh rate being higher than the second refresh rate, and
wherein one refresh period includes a first porch period based on at least an operation being performed at the first refresh rate, and/or includes a second porch period different from the first porch period based on at least an operation being performed at the second refresh rate.

2. The electronic device of claim 1 , wherein a length of one duty cycle corresponding to the first refresh rate is the same as a length of one duty cycle corresponding to the second refresh rate.

3. The electronic device of claim 1 , wherein one duty cycle comprises a light emitting period and a non-light emitting period, and light emitting periods and non-light emitting periods corresponding to different refresh rates have the same time.

4. The electronic device of claim 1 , wherein the processor is configured to determine a number of duty cycles corresponding to each refresh rate based on a common divisor of refresh rates for driving the display, and to include as many light emitting periods and non-light emitting periods as the number of duty cycles in the duty cycles corresponding to each refresh rate.

5. The electronic device of claim 4 , wherein the processor is configured to include a porch period in one refresh period based on the determined number of duty cycles.

6. The electronic device of claim 5 , wherein the processor is configured to include as many non-light emitting periods as a number of light emitting periods included in the duty cycles, as black periods in the duty cycles.

7. The electronic device of claim 6 , wherein the processor is configured to control the electronic device to detect an event and to change the first refresh rate set in the display to the second refresh rate corresponding to the event.

8. The electronic device of claim 7 , wherein the event comprises at least one of detection of a user input, execution of a preset application, detection of a user input in a preset application, a variance in an image being a reference value or greater, display of a still image, or whether the electronic device is available for a preset time.

9. The electronic device of claim 8 , wherein the processor is configured to control the electronic device to change to the second refresh rate to be higher than the first refresh rate based on the event being at least one of the user input, the execution of the preset application, the detection of the user input in the preset application, or the variance in the image being the reference value or greater.

10. The electronic device of claim 8 , wherein the processor is configured to control the electronic device to change to the second refresh rate to be lower than the first refresh rate based on the event being the display of the still image or the electronic device being unavailable for the preset time.

11. The electronic device of claim 8 , wherein the processor is configured to control the electronic device to change to different refresh rates based on a type of a touch input of the user input.

12. The electronic device of claim 7 , wherein the processor is configured to control the electronic device to determine whether a touch drag is detected after changing to the second refresh rate, to maintain the second refresh rate based on the touch drag being detected, and to change to the first refresh rate based on the touch drag not being detected.

13. The electronic device of claim 12 , wherein the processor is configured to control the electronic device to change to a refresh rate lower than the first refresh rate based on the touch drag not being detected and a still image being displayed on the display.

14. The electronic device of claim 7 , wherein the processor is configured to control the electronic device to change the first refresh rate to the second refresh rate by stages.

15. The electronic device of claim 14 , wherein the processor is configured to control the electronic device to change the first refresh rate to a third refresh rate, to drive the display during a duty cycle corresponding to the third refresh rate, and to change the third refresh rate to the second refresh rate.

16. The electronic device of claim 6 , wherein the memory includes gamma data corresponding to at least two refresh rates of the display, wherein the processor is configured to control the electronic device to detect an event and to change the first refresh rate to the second refresh rate corresponding to the event based on the stored gamma data.

17. An operating method of an electronic device, the method comprising:
operating according to a first number of duty cycles based on a display of the electronic device operating at a first refresh rate; and
operating according to a second number of duty cycles based on the display operating at a second refresh rate,
wherein the first number is less than the second number based on the first refresh rate being higher than the second refresh rate, and
wherein one refresh period includes a first porch period based on an operation being performed at the first refresh rate, and/or includes a second porch period different from the first porch period based on an operation being performed at the second refresh rate.

18. The method of claim 17 , wherein a length of one duty cycle corresponding to the first refresh rate is substantially the same as a length of one duty cycle corresponding to the second refresh rate.

19. The method of claim 17 , wherein the one refresh period comprises the first porch period based on an operation being performed at the first refresh rate, and comprises the second porch period different from the first porch period based on an operation being performed at the second refresh rate.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Her Yongkoo
• Kim Youngdo
• Bae Jungbae
• Shin Hyunchang
• Lee Joongyu
• Jung Songhee
• Choi Jaeseung

Classifications

• G09G3/3208 Primary

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

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G06F3/0486

  Drag-and-drop · CPC title

• G06F3/0488

  using a touch-screen or digitiser, e.g. input of commands through traced gestures · CPC title

• G09G5/10 Primary

  Intensity circuits · CPC title