Gray-level compensation method and apparatus, display device and computer storage medium

1. A gray-level compensation method, comprising:

acquiring an initial gray-level value of a target pixel;

determining an actual luminance offset of the target pixel based on the initial gray-level value, wherein different initial gray-level values within a specified threshold range correspond to different actual luminance offsets; and

performing gray-level compensation on the target pixel based on the actual luminance offset

wherein the determining the actual luminance offset of the target pixel based on the initial gray-level value comprises: determining an interpolation coefficient based on the initial gray-level value, acquiring a set luminance offset of the target pixel, and determining a product of the interpolation coefficient and the set luminance offset as the actual luminance offset and wherein:

the determining the interpolation coefficient based on the initial gray-level value comprises:

acquiring a positive correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is less than a first gray-level threshold, and determining the interpolation coefficient corresponding to the initial gray-level value based on the positive correlation relationship; or,

acquiring a negative correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is greater than a second gray-level threshold, and determining the interpolation coefficient corresponding to the initial gray-level value based on the negative correlation relationship; or,

determining that the interpolation coefficient is a fixed coefficient when the initial gray-level value is not less than a first gray-level threshold and not greater than a second gray-level threshold, wherein the second gray-level threshold is greater than the first gray-level threshold; or,

the performing the gray-level compensation on the target pixel based on the actual luminance offset comprises:

determining an actual applied voltage of the target pixel based on a voltage compensation formula, wherein the actual applied voltage is for driving the target pixel to emit light, and the actual applied voltage is positively correlated to a displayed gray-level value of the target pixel, wherein the voltage compensation formula is Y=a*X+η*b, X denotes an initial input voltage which is a voltage corresponding to the initial gray-level value, Y denotes the actual applied voltage, a denotes a voltage gain, b denotes the set luminance offset, η denotes the interpolation coefficient, η*b denotes the actual luminance offset, each of a and b is a constant greater than zero, and 0≤η≤1.

2. The gray-level compensation method according to claim 1 , wherein the first gray-level threshold is 20.

3. The gray-level compensation method according to claim 1 , wherein the second gray-level threshold is 235.

4. The gray-level compensation method according to claim 1 , wherein the actual luminance offset is zero when the initial gray-level value is zero.

5. A gray-level compensation apparatus, comprising: a processor and a memory, wherein

the memory is configured to store a program; and

the processor is configured to execute the program stored in the memory, to:

acquire an initial gray-level value of a target pixel;

determine an actual luminance offset of the target pixel based on the initial gray-level value, wherein different initial gray-level values within a specified threshold range correspond to different actual luminance offsets; and

perform gray-level compensation on the target pixel based on the actual luminance offset offset:

wherein the processor is configured to: determine an interpolation coefficient based on the initial gray-level value, acquire a set luminance offset of the target pixel, and determine a product of the interpolation coefficient and the set luminance offset as the actual luminance offset and wherein:

the processor is configured to:

acquire a positive correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is less than a first gray-level threshold, and determine the interpolation coefficient corresponding to the initial gray-level value based on the positive correlation relationship; or,

acquire a negative correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is greater than a second gray-level threshold, and determine the interpolation coefficient corresponding to the initial gray-level value based on the negative correlation relationship; or,

determine that the interpolation coefficient is a fixed coefficient when the initial gray-level value is not less than a first gray-level threshold and not greater than a second gray-level threshold, wherein the second gray-level threshold is greater than the first gray-level threshold; or,

the processor is configured to:

determine an actual applied voltage of the target pixel based on a voltage compensation formula, wherein the actual applied voltage is for driving the target pixel to emit light, and the actual applied voltage is positively correlated to a displayed gray-level value of the target pixel, wherein the voltage compensation formula is Y=a*X+η*b, X denotes an initial input voltage which is a voltage corresponding to the initial gray-level value, Y denotes the actual applied voltage, a denotes a voltage gain, b denotes the set luminance offset, η denotes the interpolation coefficient, η*b denotes the actual luminance offset, each of a and b is a constant greater than zero, and 0≤η≤1.

6. The gray-level compensation apparatus according to claim 5 , wherein the first gray-level threshold is 20.

7. The gray-level compensation apparatus according to claim 5 , wherein the second gray-level threshold is 235.

8. A display device, comprising the gray-level compensation apparatus according to claim 5 .

9. The display device according to claim 8 , wherein the display device is an organic light emitting diode (OLED) display device.

10. The display device according to claim 8 , wherein the first gray-level threshold is 20.

11. The display device according to claim 8 , wherein the second gray-level threshold is 235.

12. The display device according to claim 8 , wherein the actual luminance offset is zero when the initial gray-level value is zero.

13. The gray-level compensation apparatus according to claim 5 , wherein the actual luminance offset is zero when the initial gray-level value is zero.

14. A non-transitory computer readable storage medium, wherein, when a program stored in the non-transitory computer readable storage medium is executed by a processor, the following steps are implemented:

acquiring an initial gray-level value of a target pixel;

determining an actual luminance offset of the target pixel based on the initial gray-level value, wherein different initial gray-level values within a specified threshold range correspond to different actual luminance offsets; and

performing gray-level compensation on the target pixel based on the actual luminance offset;

wherein the determining the actual luminance offset of the target pixel based on the initial gray-level value comprises: determining an interpolation coefficient based on the initial gray-level value, acquiring a set luminance offset of the target pixel, and determining a product of the interpolation coefficient and the set luminance offset as the actual luminance offset; and wherein:

the determining the interpolation coefficient based on the initial gray-level value comprises:

acquiring a positive correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is less than a first gray-level threshold, and determining the interpolation coefficient corresponding to the initial gray-level value based on the positive correlation relationship; or,

acquiring a negative correlation relationship between the initial gray-level value and the interpolation coefficient when the initial gray-level value is greater than a second gray-level threshold, and determining the interpolation coefficient corresponding to the initial gray-level value based on the negative correlation relationship; or,

determining that the interpolation coefficient is a fixed coefficient when the initial gray-level value is not less than a first gray-level threshold and not greater than a second gray-level threshold, wherein the second gray-level threshold is greater than the first gray-level threshold; or,

the performing the gray-level compensation on the target pixel based on the actual luminance offset comprises:

determining an actual applied voltage of the target pixel based on a voltage compensation formula, wherein the actual applied voltage is for driving the target pixel to emit light, and the actual applied voltage is positively correlated to a displayed gray-level value of the target pixel, wherein the voltage compensation formula is Y=a*X+η*b, X denotes an initial input voltage which is a voltage corresponding to the initial gray-level value, Y denotes the actual applied voltage, a denotes a voltage gain, b denotes the set luminance offset, η denotes the interpolation coefficient, η*b denotes the actual luminance offset, each of a and b is a constant greater than zero, and 0≤η≤1.

15. The non-transitory computer readable storage medium according to claim 14 , wherein the first gray-level threshold is 20.

16. The non-transitory computer readable storage medium according to claim 14 , wherein the second gray-level threshold is 235.

17. The non-transitory computer readable storage medium according to claim 14 , wherein the actual luminance offset is zero when the initial gray-level value is zero.