Granted Patent B2

US 12,374,305 · App. 17/769,816 · Granted Jul 29, 2025

Inventors: Xiaobing Lu (Guangdong, CN); Xiaolong Chen (Guangdong, CN)

Assignees: Huizhou China Star Optoelectronics Display Co., Ltd.; Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

G09G3/3614G09G3/2007G09G3/3607G09G2320/0247G09G2320/0276G09G2320/0673G09G2330/021G09G2330/023G09G2330/028

Abstract

Claims (54)

1. A method for driving a display device, the method comprising following steps:

determining a grayscale extreme value corresponding to a polarity of display data of a target frame image according to the polarity, wherein the grayscale extreme value comprises a first grayscale positive extreme value and a first grayscale negative extreme value;

transforming a plurality of first grayscales of positive polarity display data to obtain a second grayscale positive extreme value corresponding to a positive polarity;

and transforming a plurality of first grayscales of negative polarity display data to obtain a second grayscale negative extreme value corresponding to a negative polarity;

adjusting a voltage value of a first power supply voltage of the display device to obtain a voltage value of a second power supply voltage, comprising:

adjusting a voltage value of a gamma reference voltage corresponding to the positive polarity or the negative polarity according to each of the first grayscale positive extreme value and the first grayscale negative extreme value; and

adjusting the voltage value of the first power supply voltage according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity, a second gamma voltage positive extreme value, and a second gamma voltage negative extreme value, wherein the second gamma voltage positive extreme value is obtained based on the second grayscale positive extreme value, and the second gamma voltage negative extreme value is obtained based on the second grayscale negative extreme value, to obtain the voltage value of the second power supply voltage; and

driving the display device for displaying according to the voltage value of the second power supply voltage and the display data of the target frame image.

2. The method for driving the display device according to claim 1 , wherein the step of transforming the plurality of first grayscales of the positive polarity display data to obtain the second grayscale positive extreme value corresponding to the positive polarity comprises following steps:

transforming the plurality of first grayscales of the positive polarity display data to obtain a plurality of transformed second grayscales corresponding to the positive polarity; and

obtaining the second grayscale positive extreme value corresponding to the positive polarity according to the plurality of transformed second grayscales corresponding to the positive polarity.

3. The method for driving the display device according to claim 1 , wherein the step of transforming the plurality of first grayscales of the negative polarity display data to obtain the second grayscale negative extreme value corresponding to the negative polarity comprises following steps:

transforming the plurality of first grayscales of the negative polarity display data to obtain a plurality of transformed second grayscales corresponding to the negative polarity; and

obtaining the second grayscale negative extreme value corresponding to the negative polarity according to the plurality of transformed second grayscales corresponding to the negative polarity.

4. The method for driving the display device according to claim 1 , wherein the voltage value of the gamma reference voltage comprises a voltage value of a gamma reference positive voltage and a voltage value of a gamma reference negative voltage, and the step of determining the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity according to each of the first grayscale positive extreme value and the first grayscale negative extreme value comprises following steps:

determining a voltage value of a first gamma positive voltage corresponding to the first grayscale positive extreme value according to the first grayscale positive extreme value;

determining a voltage value of a first gamma negative voltage corresponding to the first grayscale negative extreme value according to the first grayscale negative extreme value;

determining the voltage value of the gamma reference positive voltage corresponding to the positive polarity according to the voltage value of the first gamma positive voltage; and

determining the voltage value of the gamma reference negative voltage corresponding to the negative polarity according to the voltage value of the first gamma negative voltage.

5. The method for driving the display device according to claim 1 , wherein the step of adjusting the voltage value of the first power supply voltage according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity, the second gamma voltage positive extreme value, and the second gamma voltage negative extreme value, to obtain the voltage value of the second power supply voltage comprises following steps:

determining a gamma voltage distribution according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity; and

adjusting the voltage value of the first power supply voltage according to the gamma voltage distribution to obtain the voltage value of the second power supply voltage.

6. The method for driving the display device according to claim 1 , wherein the method for driving the display device further comprises a following step: adjusting a driving power of a display panel according to the voltage value of the second power supply voltage.

7. The method for driving the display device according to claim 1 , wherein the first grayscale positive extreme value is a maximum value of the plurality of first grayscales of the target frame image corresponding to the positive polarity, and the first grayscale negative extreme value is a maximum value of the plurality of first grayscales of the target frame image corresponding to the negative polarity.

8. The method for driving the display device according to claim 1 , wherein an absolute value of the second grayscale positive extreme value corresponding to the positive polarity is different from an absolute value of the first grayscale positive extreme value, and an absolute value of the second grayscale negative extreme value corresponding to the negative polarity is different from an absolute value of the first grayscale negative extreme value.

9. The method for driving the display device according to claim 8 , wherein the absolute value of the second grayscale positive extreme value corresponding to the positive polarity is greater than the absolute value of the first grayscale positive extreme value, and the absolute value of the second grayscale negative extreme value corresponding to the negative polarity is greater than the absolute value of the first grayscale negative extreme value.

10. The method for driving the display device according to claim 1 , wherein the voltage value of the second power supply voltage is greater than an absolute value of the second gamma voltage positive extreme value or the second gamma voltage negative extreme value.

11. A display device comprising a drive and a display panel electrically connected to the drive, wherein the drive is configured to execute:

determining a grayscale extreme value corresponding to a polarity of display data of a target frame image according to the polarity, wherein the grayscale extreme value comprises a first grayscale positive extreme value and a first grayscale negative extreme value;

transforming a plurality of first grayscales of positive polarity display data to obtain a second grayscale positive extreme value corresponding to a positive polarity; and transforming a plurality of first grayscales of negative polarity display data to obtain a second grayscale negative extreme value corresponding to a negative polarity;

adjusting a voltage value of a first power supply voltage of the display device to obtain a voltage value of a second power supply voltage, comprising:

adjusting a voltage value of a gamma reference voltage corresponding to the positive polarity or the negative polarity according to each of the first grayscale positive extreme value and the first grayscale negative extreme value; and

adjusting the voltage value of the first power supply voltage according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity, a second gamma voltage positive extreme value, and a second gamma voltage negative extreme value, wherein the second gamma voltage positive extreme value is obtained based on the second grayscale positive extreme value, and the second gamma voltage negative extreme value is obtained based on the second grayscale negative extreme value, to obtain the voltage value of a second power supply voltage; and

driving the display device for displaying according to the voltage value of the second power supply voltage and the display data of the target frame image.

12. The display device according to claim 11 , wherein the transforming the plurality of first grayscales of the positive polarity display data to obtain the second grayscale positive extreme value corresponding to the positive polarity comprises following steps:

transforming the plurality of first grayscales of the positive polarity display data to obtain a plurality of transformed second grayscales corresponding to the positive polarity; and

obtaining the second grayscale positive extreme value corresponding to the positive polarity according to the plurality of transformed second grayscales corresponding to the positive polarity.

13. The display device according to claim 11 , wherein the transforming the plurality of first grayscales of the negative polarity display data to obtain the second grayscale negative extreme value corresponding to the negative polarity comprises following steps:

transforming the plurality of first grayscales of the negative polarity display data to obtain a plurality of transformed second grayscales corresponding to the negative polarity; and

obtaining the second grayscale negative extreme value corresponding to the negative polarity according to the plurality of transformed second grayscales corresponding to the negative polarity.

14. The display device according to claim 11 , wherein the voltage value of the gamma reference voltage comprises a voltage value of a gamma reference positive voltage and a voltage value of a gamma reference negative voltage, and

the determining the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity according to each of the first grayscale positive extreme value and the first grayscale negative extreme value comprises following steps:

determining a voltage value of a first gamma positive voltage corresponding to the first grayscale positive extreme value according to the first grayscale positive extreme value;

determining a voltage value of a first gamma negative voltage corresponding to the first grayscale negative extreme value according to the first grayscale negative extreme value;

determining the voltage value of the gamma reference positive voltage corresponding to the positive polarity according to the voltage value of the first gamma positive voltage; and

determining the voltage value of the gamma reference negative voltage corresponding to the negative polarity according to the voltage value of the first gamma negative voltage.

15. The display device according to claim 11 , wherein the adjusting the voltage value of the first power supply voltage according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity, the second gamma voltage positive extreme value, and the second gamma voltage negative extreme value, to obtain the voltage value of the second power supply voltage comprises following steps:

determining a gamma voltage distribution according to the voltage value of the gamma reference voltage corresponding to the positive polarity or the negative polarity; and

adjusting the voltage value of the first power supply voltage according to the gamma voltage distribution to obtain the voltage value of the second power supply voltage.

16. The display device according to claim 11 , wherein the drive is configured to further execute adjusting a driving power of a display panel according to the voltage value of the second power supply voltage.

17. The display device according to claim 11 , wherein the first grayscale positive extreme value is a maximum value of the plurality of first grayscales of the target frame image corresponding to the positive polarity, and the first grayscale negative extreme value is a maximum value of the plurality of first grayscales of the target frame image corresponding to the negative polarity.

18. The display device according to claim 11 , wherein an absolute value of the second grayscale positive extreme value corresponding to the positive polarity is different from an absolute value of the first grayscale positive extreme value, and an absolute value of the second grayscale negative extreme value corresponding to the negative polarity is different from an absolute value of the first grayscale negative extreme value.

19. The display device according to claim 18 , wherein the absolute value of the second grayscale positive extreme value corresponding to the positive polarity is greater than the absolute value of the first grayscale positive extreme value, and the absolute value of the second grayscale negative extreme value corresponding to the negative polarity is greater than the absolute value of the first grayscale negative extreme value.

20. The display device according to claim 11 , wherein the voltage value of the second power supply voltage is greater than an absolute value of the second gamma voltage positive extreme value or the second gamma voltage negative extreme value.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (60)