Driving method for display panel and display device

Patent metadata

Field	Value
Publication number	US-12424136-B2
Application number	US-202318515630-A
Country	US
Kind code	B2
Filing date	Nov 21, 2023
Priority date	May 25, 2023
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A driving method for a display panel and a display device are provided. The display panel includes multiple types of Light-Emitting Diodes (LEDs). Different types of LEDs have different light-emitting colors. The driving method for the display panel includes the following. Target driving-current values corresponding to the multiple types of LEDs are obtained. Each type of LED corresponds to a target driving-current value. Each type of LED corresponds to an adjusted driving-current value. For each type of LED, the adjusted driving-current value corresponding to the type of LED is different from the target driving-current value corresponding to the type of LED. Currents having corresponding target driving-current values are provided for the multiple types of LEDs respectively.

First claim

What is claimed is:

1. A driving method for a display panel, wherein the display panel comprises a plurality of types of Light-Emitting Diodes (LEDs), different types of LEDs have different light-emitting colors, and the driving method for the display panel comprises:
obtaining a target grayscale value of the display panel;
determining, according to a preset correspondence corresponding to each type of LED between grayscale values and driving-current values, a driving-current value corresponding to each type of LED at the target grayscale value as a target driving-current value, to obtain target driving-current values corresponding to all LEDs at the target grayscale value, wherein the target driving-current values corresponding to the plurality of types of LEDs are different, and the preset correspondence between the grayscale values and the driving-current values defines that the grayscale values are positively correlated with the driving-current values;
providing currents having corresponding adjusted driving-current values for the plurality of types of LEDs respectively, wherein said each type of LED corresponds to an adjusted driving-current value, and for said each type of LED, the adjusted driving-current value corresponding to the type of LED is different from the target driving-current value corresponding to the type of LED; and
providing currents having corresponding target driving-current values for the plurality of types of LEDs respectively.

2. The driving method for the display panel of claim 1 , wherein before providing the currents having the corresponding adjusted driving-current values for the plurality of types of LEDs, the driving method for the display panel further comprises:
obtaining a present grayscale value of the display panel; and
determining the adjusted driving-current values corresponding to the plurality of types of LEDs, according to the present grayscale value and the target grayscale value.

3. The driving method for the display panel of claim 2 , wherein determining the adjusted driving-current values corresponding to the plurality of types of LEDs, according to the present grayscale value and the target grayscale value comprises:
determining the adjusted driving-current value corresponding to the type of LED to be greater than the target driving-current value corresponding to the type of LED, when the present grayscale value is less than the target grayscale value; and
determining the adjusted driving-current value corresponding to the type of LED to be less than the target driving-current value corresponding to the type of LED, when the present grayscale value is greater than the target grayscale value.

4. The driving method for the display panel of claim 3 , wherein determining the adjusted driving-current values corresponding to the plurality of types of LEDs, according to the present grayscale value and the target grayscale value comprises:
determining a target grayscale-correction-value corresponding to the type of LED, according to the present grayscale value and the target grayscale value; and
determining the adjusted driving-current value corresponding to the type of LED, according to the target grayscale value and the target grayscale-correction-value corresponding to the type of LED.

5. The driving method for the display panel of claim 2 , wherein determining the adjusted driving-current values corresponding to the plurality of types of LEDs, according to the present grayscale value and the target grayscale value comprises:
determining a target grayscale-correction-value corresponding to the type of LED, according to the present grayscale value and the target grayscale value; and
determining the adjusted driving-current value corresponding to the type of LED, according to the target grayscale value and the target grayscale-correction-value corresponding to the type of LED.

6. The driving method for the display panel of claim 5 , wherein determining the target grayscale-correction-value corresponding to the type of LED, according to the present grayscale value and the target grayscale value comprises:
determining the target grayscale-correction-value corresponding to the type of LED, according to the present grayscale value, the target grayscale value, and a preset grayscale-correction-value lookup table, wherein the grayscale-correction-value lookup table records a correspondence between present grayscale values, target grayscale values, and grayscale correction values of the type of LED; and
determining the adjusted driving-current value corresponding to the type of LED, according to the target grayscale value and the target grayscale-correction-value corresponding to the type of LED.

7. The driving method for the display panel of claim 6 , wherein determining the adjusted driving-current value corresponding to the type of LED, according to the target grayscale value and the target grayscale-correction-value corresponding to the type of LED comprises:
adding the target grayscale value and the target grayscale-correction-value corresponding to the type of LED, to obtain a target grayscale value corrected of the type of LED, wherein when the present grayscale value is less than the target grayscale value, the target grayscale-correction-value corresponding to the type of LED is a positive value, and an obtained target grayscale value corrected is greater than the target grayscale value; and when the present grayscale value is greater than the target grayscale value, the target grayscale-correction-value corresponding to the type of LED is a negative value, and the obtained target grayscale value corrected is less than the target grayscale value; and
determining a driving-current value corresponding to the target grayscale value corrected of the type of LED as the adjusted driving-current value corresponding to the type of LED, according to the preset correspondence corresponding to the type of LED between the grayscale values and the driving-current values.

8. The driving method for the display panel of claim 1 , wherein the plurality of types of LEDs comprises three types of LEDs, light-emitting colors of the three types of LEDs are red, blue, and green respectively, and the number of LEDs of the type of LED is at least one.

9. A display device, comprising a display panel, a memory, and a processor, wherein the memory is configured to store computer programs, and the processor is configured to invoke the computer programs to execute a driving method for the display panel; wherein the display panel comprises a plurality of types of Light-Emitting Diodes (LEDs), different types of LEDs have different light-emitting colors, and the processor is configured to invoke the computer programs to execute:
obtaining a target grayscale value of the display panel;
determining, according to a preset correspondence corresponding to each type of LED between grayscale values and driving-current values, a driving-current value corresponding to each type of LED at the target grayscale value as a target driving-current value, to obtain target driving-current values corresponding to all LEDs at the target grayscale value, wherein the target driving-current values corresponding to the plurality of types of LEDs are different, and the preset correspondence between the grayscale values and the driving-current values defines that the grayscale values are positively correlated with the driving-current values;
providing currents having corresponding adjusted driving-current values for the plurality of types of LEDs respectively, wherein said each type of LED corresponds to an adjusted driving-current value, and for said each type of LED, the adjusted driving-current value corresponding to the type of LED is d

Assignees

• Chongqing Hkc Optoelectronics Tech Co Ltd
• Hkc Corp Ltd

Inventors

• Cheng Yi
• Yuan Haijiang

Classifications

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G3/2007 Primary

  Display of intermediate tones · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title