Display degradation compensation

1. A method comprising, by a computing system:

determining, a temperature distribution pattern comprising a plurality of temperature regions for an array of light emitting elements of a display;

determining a correction mesh grid for the array of light emitting elements of the display, wherein the correction mesh grid comprises a plurality of mesh grid units each corresponding to a sub-array of light emitting elements of the array of light emitting elements, and wherein the plurality of mesh grid units respectively correspond to the plurality of temperature regions;

for each of the plurality of mesh grid units of the correction mesh grid:

determining an average temperature for the sub-array of light emitting elements of the mesh grid unit based on a portion of the temperature distribution pattern associated with the temperature region corresponding to the mesh grid unit;

determining a degradation level for the sub-array of light emitting elements of the mesh grid unit based on the average temperature determined for the sub-array of light emitting elements of that mesh grid unit;

determining, based on the degradation level of the sub-array of light emitting elements of the mesh grid unit, a scaling factor for the sub-array of light emitting elements;

accessing an image to be output by the array of light emitting elements of the display;

adjusting pixel values of the image using the scaling factors associated with the plurality of mesh grid units; and

outputting the adjusted pixel values of the image using the array of light emitting elements.

2. The method of claim 1 , wherein the degradation level is determined based on a combination of one or more short-term factors and one or more long-term factors related to degradation of the display.

3. The method of claim 2 , wherein the one or more short-term factors comprise temperature associated with the array of light emitting elements.

4. The method of claim 3 , wherein the temperature distribution pattern is determined using one or more temperature sensors associated with the array of light emitting elements.

5. The method of claim 3 , wherein the degradation level is determined based on a pre-determined function mapping temperature values to degradation levels, and wherein the pre-determined function corresponds to a color channel of the display.

6. The method of claim 2 , wherein the one or more long-term factors comprise one or more of: a usage time duration, an accumulative usage time, a current time, a manufacture date, a usage frequency, a usage history data, a location of a light emitting element in a field of view, or a relative position of a light emitting element in an associated light emitting element array.

7. The method of claim 6 , wherein the degradation level is determined based on reduction levels of light emitting intensities of the sub-array of limit emitting elements of the mesh grid unit.

8. The method of claim 6 , wherein the sub-array of light-emitting elements corresponding to a same color channel and a same mesh grid unit share a same scaling factor.

9. The method of claim 1 , wherein the degradation levels of the array of light emitting elements change according to a display pattern of display contents.

10. The method of claim 1 , wherein the scaling factors are incorporated into a compensation matrix for compensating one or more of: dead pixels of the display, non-uniformity of the array of light emitting elements, a waveguide distortion of the display, or a lens distortion of the display.

11. The method of claim 1 , wherein the adjusted pixel values of the image are output using the array of light emitting elements based on a 3D look-up table mapping a first color gamut to a second color gamut to compensate a global wavelength shift.

12. The method of claim 1 , wherein relative values of three color components of one or more pixel values are adjusted to compensate a local wavelength shift, and wherein the adjustment of the relative values of the three color components of the one or more pixel values are performed by a wavelength compensation step of a pixel processing pipeline before outputting the one or more pixel values using the array of light-emitting elements.

13. One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

determine, a temperature distribution pattern comprising a plurality of temperature regions for an array of light emitting elements of a display;

determine a correction mesh grid for the array of light emitting elements of the display, wherein the correction mesh grid comprises a plurality of mesh grid units each corresponding to a sub-array of light emitting elements of the array of light emitting elements, and wherein the plurality of mesh grid units respectively correspond to the plurality of temperature regions;

for each of the plurality of mesh grid units of the correction mesh grid:

determine an average temperature for the sub-array of light emitting elements of the mesh grid unit based on a portion of the temperature distribution pattern associated with the temperature region corresponding to the mesh grid unit;

determine a degradation level for the sub-array of light emitting elements of the mesh grid unit based on the average temperature determined for the sub-array of light emitting elements of that mesh grid unit;

determine, based on the degradation level of the sub-array of light emitting elements of the mesh grid unit, a scaling factor for the sub-array of light emitting elements;

access of an image to be output by the array of light emitting elements of the display;

adjust pixel values of the image using the scaling factors associated with the plurality of mesh grid units; and

output the adjusted pixel values of the image using the array of light emitting elements.

14. The media of claim 13 , wherein the degradation level is determined based on a combination of one or more short-term factors and one or more long-term factors related to degradation of the display.

15. The media of claim 14 , wherein the one or more short-term factors comprise temperature associated with the array of light emitting elements.

16. The media of claim 13 , wherein the temperature distribution pattern is determined using one or more temperature sensors associated with the array of light emitting elements.

17. A system comprising:

one or more non-transitory computer-readable storage media embodying instructions; and

one or more processors coupled to the storage media and operable to execute the instructions to:

determine, a temperature distribution pattern comprising a plurality of temperature regions for an array of light emitting elements of a display;

determine a correction mesh grid for the array of light emitting elements of the display, wherein the correction mesh grid comprises a plurality of mesh grid units each corresponding to a sub-array of light emitting elements of the array of light emitting elements, and wherein the plurality of mesh grid units respectively correspond to the plurality of temperature regions;

for each of the plurality of mesh grid units of the correction mesh grid:

determine an average temperature for the sub-array of light emitting elements of the mesh grid unit based on a portion of the temperature distribution pattern associated with the temperature region corresponding to the mesh grid unit;

determine a degradation level for the sub-array of light emitting elements of the mesh grid unit based on the average temperature determined for the sub-array of light emitting elements of that mesh grid unit;

determine, based on the degradation level of the sub-array of light emitting elements of the mesh grid unit, a scaling factor for the sub-array of light emitting elements;

access an image to be output by the array of light emitting elements of the display;

adjust pixel values of the image using the scaling factors associated with the plurality of mesh grid units; and

output the adjusted pixel values of the image using the array of light emitting elements.

18. The system of claim 17 , wherein the degradation level is determined based on a combination of one or more short-term factors and one or more long-term factors related to degradation of the display.

19. The system of claim 18 , wherein the one or more short-term factors comprise temperature associated with the array of light emitting elements.

20. The system of claim 17 , wherein the temperature distribution pattern is determined using one or more temperature sensors associated with the array of light emitting elements.