Gamma correction method and device, display device, and computer storage medium

1. A gamma correction method, comprising:

acquiring measurement data of a first display panel, wherein the measurement data comprises m display brightness levels to be compensated and m sets of compensation parameters corresponding to the m display brightness levels, where m is a positive integer; and

compensating a second display panel at a corresponding display brightness level with the m sets of compensation parameters respectively,

wherein the second display panel and the first display panel have same structure and material,

wherein acquiring the measurement data of the first display panel comprises:

determining the m display brightness levels according to brightness data of the first display panel on which gamma correction at a second display brightness level is completed, wherein the second display brightness level is different from the m display brightness levels and is a maximum display brightness level, and

wherein compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively comprises:

compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively after gamma correction is performed on the second display panel at the second display brightness level.

2. The method according to claim 1 , wherein acquiring the measurement data of the first display panel comprises:

acquiring grayscale brightness values of all grayscale binding points of the first display panel at a first display brightness level, wherein the first display brightness level is any display brightness level in the m display brightness levels;

determining all target grayscale binding points from all the grayscale binding points, wherein a difference between an actual grayscale brightness value of the target grayscale binding point and a corresponding standard grayscale brightness value is greater than a difference threshold; and

generating a compensation parameter corresponding to the first display brightness level according to grayscales of all the target grayscale binding points and the corresponding standard grayscale brightness values.

3. The method according to claim 2 , wherein generating the compensation parameter corresponding to the first display brightness level according to the grayscales of all the target grayscale binding points and the corresponding standard grayscale brightness values comprises:

acquiring any two target grayscale binding points of all the target grayscale binding points;

determining a compensation magnification and a compensation amount using the grayscales of the any two target grayscale binding points and the corresponding standard grayscale brightness values, according to a correction formula: Z=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Z denotes the standard grayscale brightness value corresponding to the target grayscale binding point; and

determining the compensation magnification and the compensation amount as the compensation parameters corresponding to the first display brightness level when a difference between a target grayscale brightness value of each of the target grayscale binding points that have been compensated with the compensation magnification and the compensation amount and the corresponding standard grayscale brightness value is not greater than the difference threshold.

4. The method according to claim 2 , wherein the measurement data further comprises grayscales of all the target grayscale binding points at the first display brightness level, and compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively comprises:

compensating each of the target grayscale binding points of the second display panel at the first display brightness level with the compensation parameter corresponding to the first display brightness level.

5. The method according to claim 4 , wherein the compensation parameter comprises a compensation magnification and a compensation amount, and compensating each of the target grayscale binding points of the second display panel at the first display brightness level with the compensation parameter corresponding to the first display brightness level comprises:

compensating, based on the grayscale of each of the target grayscale binding points, each of the target grayscale binding points of the second display panel at the first display brightness level according to a compensation formula;

wherein the correction formula is Y=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Y denotes the grayscale brightness value of the target grayscale binding point after compensation.

6. The method according to claim 1 , wherein the brightness data is obtained by measuring the brightness of the first display panel at each display brightness level with an optical detector.

7. The method according to claim 1 , wherein the second display panel and the first display panel satisfy one of the following relationships:

the second display panel and the first display panel belong to the same production batch; and

the second display panel and the first display panel are the same display panel.

8. A gamma correction device, comprising: a processor and a non-transitory memory,

wherein the memory is configured to store a computer program; and

the processor is configured to execute the computer program stored in the memory;

the computer program comprises instructions for implementing following operations:

acquiring measurement data of a first display panel, wherein the measurement data comprises m display brightness levels to be compensated and m sets of compensation parameters corresponding to the m display brightness levels, where m is a positive integer; and

compensating a second display panel at a corresponding display brightness level with the m sets of compensation parameters respectively,

wherein the second display panel and the first display panel have same structure and material,

wherein acquiring the measurement data of the first display panel comprises:

determining the m display brightness levels according to brightness data of the first display panel on which gamma correction at a second display brightness level is completed, wherein the second display brightness level is different from the m display brightness levels and is a maximum display brightness level, and

wherein compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively comprises:

compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively after gamma correction is performed on the second display panel at the second display brightness level.

9. The device according to claim 8 , wherein the computer program further comprises instructions for implementing following operations:

acquiring grayscale brightness values of all grayscale binding points of the first display panel at a first display brightness level, wherein the first display brightness level is any display brightness level in the m display brightness levels;

determining all target grayscale binding points from all the grayscale binding points, wherein a difference between an actual grayscale brightness value of the target grayscale binding point and a corresponding standard grayscale brightness value is greater than a difference threshold; and

generating a compensation parameter corresponding to the first display brightness level according to grayscales of all the target grayscale binding points and the corresponding standard grayscale brightness values.

10. The device according to claim 9 , wherein the computer program further comprises instructions for implementing following operations:

acquiring any two target grayscale binding points of all the target grayscale binding points;

determining a compensation magnification and a compensation amount using the grayscales of the any two target grayscale binding points and the corresponding standard grayscale brightness values, according to a correction formula: Z=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Z denotes the standard grayscale brightness value corresponding to the target grayscale binding point; and

determining the compensation magnification and the compensation amount as the compensation parameters corresponding to the first display brightness level when a difference between a target grayscale brightness value of each of the target grayscale binding points that have been compensated with the compensation magnification and the compensation amount and the corresponding standard grayscale brightness value is not greater than the difference threshold.

11. The device according to claim 9 , wherein the measurement data further comprises grayscales of all the target grayscale binding points at the first display brightness level, and the computer program further comprises instructions for implementing following operations:

compensating each of the target grayscale binding points of the second display panel at the first display brightness level with the compensation parameter corresponding to the first display brightness level.

12. The device according to claim 11 , wherein the compensation parameter comprises a compensation magnification and a compensation amount, and the computer program further comprises instructions for implementing following operations:

compensating, based on the grayscale of each of the target grayscale binding points, each of the target grayscale binding points of the second display panel at the first display brightness level according to a compensation formula;

wherein the correction formula is Y=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Y denotes the grayscale brightness value of the target grayscale binding point after compensation.

13. The device according to claim 8 , wherein the brightness data is obtained by measuring the brightness of the first display panel at each display brightness level with an optical detector.

14. The device according to claim 8 , wherein the second display panel and the first display panel satisfy one of the following relationships:

the second display panel and the first display panel belong to the same production batch; and

the second display panel and the first display panel are the same display panel.

15. A display device, comprising the gamma correction device as defined in claim 8 .

16. A non-transitory computer storage medium, comprising instructions stored therein, wherein the instructions, when executed by a processor, cause the process to implement a gamma correction method comprising:

acquiring measurement data of a first display panel, wherein the measurement data comprises m display brightness levels to be compensated and m sets of compensation parameters corresponding to the m display brightness levels, where m is a positive integer; and

compensating a second display panel at a corresponding display brightness level with the m sets of compensation parameters respectively,

wherein the second display panel and the first display panel have same structure and material,

wherein acquiring the measurement data of the first display panel comprises:

determining the m display brightness levels according to brightness data of the first display panel on which gamma correction at a second display brightness level is completed, wherein the second display brightness level is different from the m display brightness levels and is a maximum display brightness level, and

wherein compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively comprises:

compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively after gamma correction is performed on the second display panel at the second display brightness level.

17. The non-transitory computer storage medium according to claim 16 , wherein acquiring the measurement data of the first display panel comprises:

acquiring grayscale brightness values of all grayscale binding points of the first display panel at a first display brightness level, wherein the first display brightness level is any display brightness level in the m display brightness levels;

determining all target grayscale binding points from all the grayscale binding points, wherein a difference between an actual grayscale brightness value of the target grayscale binding point and a corresponding standard grayscale brightness value is greater than a difference threshold; and

generating a compensation parameter corresponding to the first display brightness level according to grayscales of all the target grayscale binding points and the corresponding standard grayscale brightness values.

18. The non-transitory computer storage medium according to claim 17 , wherein generating the compensation parameter corresponding to the first display brightness level according to the grayscales of all the target grayscale binding points and the corresponding standard grayscale brightness values comprises:

acquiring any two target grayscale binding points of all the target grayscale binding points;

determining a compensation magnification and a compensation amount using the grayscales of the any two target grayscale binding points and the corresponding standard grayscale brightness values, according to a correction formula: Z=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Z denotes the standard grayscale brightness value corresponding to the target grayscale binding point; and

determining the compensation magnification and the compensation amount as the compensation parameters corresponding to the first display brightness level when a difference between a target grayscale brightness value of each of the target grayscale binding points that have been compensated with the compensation magnification and the compensation amount and the corresponding standard grayscale brightness value is not greater than the difference threshold.

19. The non-transitory computer storage medium according to claim 17 , wherein the measurement data further comprises grayscales of all the target grayscale binding points at the first display brightness level, and compensating the second display panel at the corresponding display brightness level with the m sets of compensation parameters respectively comprises:

compensating each of the target grayscale binding points of the second display panel at the first display brightness level with the compensation parameter corresponding to the first display brightness level.

20. The non-transitory computer storage medium according to claim 19 , wherein the compensation parameter comprises a compensation magnification and a compensation amount, and compensating each of the target grayscale binding points of the second display panel at the first display brightness level with the compensation parameter corresponding to the first display brightness level comprises:

compensating, based on the grayscale of each of the target grayscale binding points, each of the target grayscale binding points of the second display panel at the first display brightness level according to a compensation formula;

wherein the correction formula is Y=X*G+offset, where X denotes the compensation magnification, offset denotes the compensation amount, G denotes the grayscale of the target grayscale binding point, and Y denotes the grayscale brightness value of the target grayscale binding point after compensation.