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1. WO2020192924 - OPERATION OF A DEVICE COMPRISING A LIGHT EMITTING DIODE

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[ EN ]

CLAIMS

1 . A method for operating a device comprising a Light Emitting Diode, LED, display, the method, performed in the device, comprising:

obtaining a representation of temperatures to which different areas of the display are subjected;

generating a display heat map from the obtained representation; and

managing the luminance of the different areas of the display on the basis of the display heat map.

2. A method as claimed in claim 1 , wherein obtaining a representation of temperatures to which different areas of the display are subjected comprises obtaining temperature readings from one or more temperature sensors positioned relative to the different areas of the display.

3. A method as claimed in claim 1 or 2, wherein obtaining a representation of temperatures to which different areas of the display are subjected comprises obtaining temperature readings from one or more temperature sensors positioned on at least one component of the display.

4. A method as claimed in claim 1 or 2, wherein obtaining a representation of temperatures to which different areas of the display are subjected comprises obtaining temperature readings from one or more temperature sensors positioned on components adjacent the display.

5. A method as claimed in claim 4, wherein the device comprises a Printed Circuit Board, PCB, and wherein obtaining a representation of temperatures to which different areas of the display are subjected comprises obtaining temperature readings from one or more temperature sensors positioned on components of the printed circuit board.

6. A method as claimed in claim 5, wherein the PCB comprises one or more shield cans arranged to at least partially protect components within the shield can from electro-magnetic and radio frequency interference, and wherein obtaining a representation of temperatures to which different areas of the display are subjected comprises obtaining temperature readings from one or more temperature sensors positioned relative to one or more shield cans.

7. A method as claimed in any one of the preceding claims, wherein generating a display heat map from the obtained representation of temperatures comprises combining the obtained representation of temperatures with a representation of the physical arrangement of the different areas of the display.

8. A method as claimed in claim 7, wherein the device comprises a Printed Circuit Board, PCB, and wherein the different areas of the display correspond to areas occupied by different components on the PCB.

9. A method as claimed in claim 8, wherein the PCB comprises one or more shield cans arranged to at least partially protect components within the shield can from electro-magnetic and radio frequency interference, and wherein the different areas of the display correspond to areas occupied by different shield cans.

10. A method as claimed in any one of the preceding claims, wherein managing the luminance of the different areas of the display on the basis of the display heat map comprises:

obtaining a representation of an image to be shown on the display;

combining the obtained representation of an image with the generated display heat map;

comparing the combined representation of an image and display heat map to an operational specification for pixels of the display; and

adjusting the luminance of the pixels of the display as a function of a result of the comparison.

1 1 . A method as claimed in claim 10, wherein obtaining a representation of an image to be shown on the display comprises obtaining a representation of required luminance of different pixels of the display to show the image.

12. A method as claimed in claim 1 1 , wherein combining the obtained representation of an image with the generated display heat map comprises:

mapping the required luminance of different pixels of the display to show the image to a required current to be passed through the pixels of the display to generate the required luminance; and

generating a combined representation of temperature and required pixel current in the different areas of the display.

13. A method as claimed in claim 1 1 or 12, wherein combining the obtained representation of an image with the generated display heat map comprises performing an image blending operation.

14. A method as claimed in claim 12 or 13, wherein comparing the combined representation of an image and display heat map to an operational specification for pixels of the display comprises:

comparing the temperature and required pixel current combination for pixels in the combined representation with a maximum temperature and current combination in the operational specification for the pixels;

and wherein adjusting the luminance of the pixels of the display as a function of a result of the comparison comprises:

for pixels for which the temperature and required pixel current combination in the combined representation exceed the maximum temperature and current combination in the operational specification, reducing the current to be passed through the pixels such that the maximum temperature and current combination in the operational specification is respected.

15. A method as claimed in claim 14, wherein reducing the current to be passed through the pixels such that the maximum temperature and current combination in the operational specification is respected comprises reducing the current by a value that is less than or equal to a maximum reduction value, wherein the maximum reduction value corresponds to a reduction in luminance of the pixels of 30% compared to the required luminance to show the image.

16. A method as claimed in any one of claims 10 to 15, wherein adjusting the luminance of the pixels of the display as a function of a result of the comparison comprises respecting a maximum rate of change of luminance per pixel row of the display.

17. A method as claimed in claim 16, wherein the maximum rate of change of luminance per pixel row comprises 1 %.

18. A method as claimed in any one of the preceding claims, further comprising performing the steps of:

obtaining a representation of temperatures to which different areas of the display are subjected; and

generating a display heat map from the obtained representation;

in a first processing unit, and performing the step of:

managing the luminance of the different areas of the display on the basis of the display heat map;

in a second processing unit.

19. A method as claimed in claim 18, wherein the first processing unit comprises a Central Processing Unit, CPU, and wherein the second processing unit comprises at least one of a Graphics Processing Unit, GPU, Video Processing Unit, VPU, or Image Signal Processor, ISP.

20. A method as claimed in any one of claims 1 to 17, further comprising performing the steps of:

obtaining a representation of temperatures to which different areas of the display are subjected;

generating a display heat map from the obtained representation; and

managing the luminance of the different areas of the display on the basis of the display heat map;

in a first processing unit.

21 . A method as claimed in claim 20, wherein the first processing unit comprises at least one of a CPU and/or an Accelerated Processing Unit, APU.

22. A method as claimed in any one of the preceding claims, wherein the display comprises at least one of:

an Organic Light Emitting Diode, OLED, display, or

a Micro Light Emitting Diode Display.

23. A computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out a method according to any one of the preceding claims.

24. A carrier containing a computer program as claimed in claim 23, wherein the carrier comprises one of an electronic signal, optical signal, radio signal or computer readable storage medium.

25. A computer program product comprising non transitory computer readable media having stored thereon a computer program as claimed in claim 23.

26. A device comprising a Light Emitting Diode, LED, display, the device comprising a processor and a memory, the memory containing instructions executable by the processor such that the device is operable to:

obtain a representation of temperatures to which different areas of the display are subjected;

generate a display heat map from the obtained representation; and

manage the luminance of the different areas of the display on the basis of the display heat map.

27. A device as claimed in claim 26, wherein the device is further operable to carry out a method as claimed in any one of claims 2 to 22.

28. A device comprising a Light Emitting Diode, LED, display, the device adapted to: obtain a representation of temperatures to which different areas of the display are subjected;

generate a display heat map from the obtained representation; and

manage the luminance of the different areas of the display on the basis of the display heat map.

29. A device as claimed in claim 28, wherein the device is further operable to carry out a method as claimed in any one of claims 2 to 22.

30. A device as claimed in any one of claims 26 to 29, further comprising:

one or more temperature sensors positioned relative to the different areas of the display.

31 . A device as claimed in claim 30, wherein the one or more temperature sensors are positioned on at least one component of the display.

32. A device as claimed in claim 30, wherein the one or more temperature sensors are positioned on components adjacent the display.

33. A device as claimed in claim 32, wherein the device further comprises a PCB and wherein the one or more temperature sensors are positioned on components of the PCB.

34. A device as claimed in claim 33, wherein the PCB comprises one or more shield cans arranged to at least partially protect components within the shield can from electro-magnetic and radio frequency interference, and wherein the one or more temperature sensors are positioned relative to one or more shield cans.