Method and apparatus for determining compensation parameter of display panel

1. A method for determining a compensation parameter of a display panel, the display panel comprising a non-display area, a first display area, a second display area, and a transition display area between the first display area and the second display area, wherein the first display area at least partially surrounds the non-display area, and the method comprising:

acquiring a first current brightness value of the first display area under a first gray level;

determining a brightness compensation coefficient f corresponding to the first display area according to the first gray level and a preset corresponding relationship between gray-level ranges and brightness compensation coefficients, wherein 0<f≤1;

determining an actual brightness value of the first display area according to a product of the first current brightness value and the brightness compensation coefficient f corresponding to the first display area;

determining a first compensation parameter corresponding to the first display area according to the actual brightness value and a first target brightness value of the first display area, wherein the first target brightness value is a brightness value at a center point of the second display area under the first gray level or an average brightness value of the second display area under the first gray level;

determining, according to a gamma curve of the display panel, a first gray-level value corresponding to the actual brightness value and a second gray-level value corresponding to the first target brightness value;

calculating a difference between the second gray-level value and the first gray-level value, to obtain the first compensation parameter corresponding to the first display area;

acquiring a third current brightness value of the transition display area under the first gray level;

selecting a part of pixel units in the transition display area as target pixel units, so that any adjacent two of the target pixel units are separated by non-selected pixel units;

determining a third compensation parameter corresponding to the target pixel units in the transition display area according to the third current brightness value and a third target brightness value of the transition display area; and

setting a compensation parameter of the non-selected pixel units in the transition display area as 0.

2. The method according to claim 1 , wherein before determining the brightness compensation coefficient f corresponding to the first display area according to the first gray level and the preset corresponding relationship between the gray-level ranges and the brightness compensation coefficients, the method further comprises:

setting a plurality of different gray-level ranges and a brightness compensation coefficient corresponding to each of the plurality of gray-level ranges, wherein a brightness compensation coefficient corresponding to a first gray-level range of any adjacent two of the plurality of gray-level ranges is less than a brightness compensation coefficient corresponding to a second gray-level range of the adjacent two gray-level ranges, and a minimum gray-level value in the first gray-level range is greater than a maximum gray-level value in the second gray-level range.

3. The method according to claim 1 , further comprising:

acquiring a second current brightness value of the second display area under the first gray level; and

determining a second compensation parameter corresponding to the second display area according to the second current brightness value and a second target brightness value of the second display area.

4. The method according to claim 3 , wherein the second target brightness value is a brightness value at a center point of the second display area under the first gray level, or,

the second target brightness value is an average brightness value of the second display area under the first gray level.

5. The method according to claim 1 , wherein determining the third compensation parameter corresponding to each of the target pixel units in the transition display area according to the third current brightness value and the third target brightness value of the transition display area, and setting the compensation parameter of the non-selected pixel units in the transition display area as 0 further comprises:

determining, according to the gamma curve of the display panel, a fifth gray-level value corresponding to the third current brightness value and a sixth gray-level value corresponding to the third target brightness value; and

calculating a difference between the sixth gray-level value and the fifth gray-level value, to obtain the third compensation parameter corresponding to the transition display area.

6. The method according to claim 1 , wherein selecting the part of the pixel units in the transition display area as the target pixel units, so that any adjacent two of the target pixel units are separated by the non-selected pixel units further comprises:

selecting the part of pixel units in the transition display area as the target pixel units, so that any adjacent two of the target pixel units along a row direction are separated by N non-selected pixel units, and any adjacent two of the target pixel units along a column direction are separated by N non-selected pixel units; wherein N is a positive integer greater than or equal to 1.

7. The method according to claim 1 , wherein the first current brightness value is a brightness value of pixel units in the first display area under the first gray level, the second current brightness value is a brightness value of pixel units in the second display area under the first gray level, and the third current brightness value is a brightness value of pixel units in the transition display area under the first gray level.

8. The method according to claim 6 , wherein each of the first target brightness value, the second target brightness value, and the third target brightness value is a brightness value of the center point of the second display area under the first gray level.

9. The method according to claim 6 , wherein each of the first target brightness value, the second target brightness value, and the third target brightness value is an average brightness value of the second display area under the first gray level.

10. The method according to claim 6 , wherein the first current brightness value is a brightness value of pixel units in the first display area under the first gray level, the second current brightness value is a brightness value of pixel units in the second display area under the first gray level, and the third current brightness value is a brightness value of pixel units in the transition display area under the first gray level; each of the first target brightness value, the second target brightness value, and the third target brightness value is a brightness value of the center point of the second display area under the first gray level, or,

each of the first target brightness value, the second target brightness value, and the third target brightness value is an average brightness value of the second display area under the first gray level.

11. The method according to claim 1 , further comprising:

storing, the first compensation parameter corresponding to the first display area, the second compensation parameter corresponding to the second display area, and the third compensation parameter corresponding to the target pixel units in the transition display area, into a storage module of the display panel.

12. An apparatus for determining a compensation parameter of a display panel, the display panel comprising a non-display area, a first display area, a second display area, and a transition display area between the first display area and the second display area, wherein the first display area at least partially surrounds the non-display area, and the apparatus comprising:

a current brightness acquiring module configured to acquire a first current brightness value of the first display area under a first gray level and acquire a third current brightness value of the transition display area under the first gray level;

a compensation coefficient determining module configured to determine a brightness compensation coefficient f corresponding to the first display area according to the first gray level and a corresponding relationship between gray-level ranges and brightness compensation coefficients, wherein 0<f≤1;

an actual brightness determining module configured to determine an actual brightness value of the first display area according to a product of the first current brightness value and the brightness compensation coefficient f corresponding to the first display area;

a compensation parameter determining module configured to determine a first compensation parameter corresponding to the first display area according to the actual brightness value and a first target brightness value of the first display area and determine a third compensation parameter corresponding to the target pixel units in the transition display area according to the third current brightness value and a third target brightness value of the transition display area and set a compensation parameter of the non-selected pixel units in the transition display area as 0; and

a selecting module configured to select a part of pixel units in the transition display area as target pixel units, so that any adjacent two of the target pixel units are separated by non-selected pixel units.

13. The apparatus according to claim 12 , further comprising:

a corresponding relationship setting module configured to:

set a plurality of different gray-level ranges and a brightness compensation coefficient corresponding to each of the plurality of gray-level ranges, wherein a brightness compensation coefficient corresponding to a first gray-level range of any adjacent two of the plurality of gray-level ranges is less than a brightness compensation coefficient corresponding to a second gray-level range of the adjacent two gray-level ranges, and a minimum gray-level value in the first gray-level range is greater than a maximum gray-level value in the second gray-level range.

14. A non-transitory computer-readable storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by a processor, implement a method for determining a compensation parameter of a display panel, the display panel comprising a non-display area, a first display area, a second display area, and a transition display area between the first display area and the second display area, wherein the first display area at least partially surrounds the non-display area, and the method comprising:

acquiring a first current brightness value of the first display area under a first gray level;

determining a brightness compensation coefficient f corresponding to the first display area according to the first gray level and a preset corresponding relationship between gray-level ranges and brightness compensation coefficients, wherein 0<f≤1;

determining an actual brightness value of the first display area according to a product of the first current brightness value and the brightness compensation coefficient f corresponding to the first display area;

determining a first compensation parameter corresponding to the first display area according to the actual brightness value and a first target brightness value of the first display area, wherein the first target brightness value is a brightness value at a center point of the second display area under the first gray level or an average brightness value of the second display area under the first gray level;

determining, according to a gamma curve of the display panel, a first gray-level value corresponding to the actual brightness value and a second gray-level value corresponding to the first target brightness value;

calculating a difference between the second gray-level value and the first gray-level value, to obtain the first compensation parameter corresponding to the first display area;

acquiring a third current brightness value of the transition display area under the first gray level;

selecting a part of pixel units in the transition display area as target pixel units, so that any adjacent two of the target pixel units are separated by non-selected pixel units;

determining a third compensation parameter corresponding to the target pixel units in the transition display area according to the third current brightness value and a third target brightness value of the transition display area; and

setting a compensation parameter of the non-selected pixel units in the transition display area as 0.