Voltage supply amplitude modulation driving outlier microLEDs

1. A method comprising:

providing, by a power supply, an alternating current voltage (V LED ) with a minimum voltage (V MIN ) and a maximum voltage (V MAX ), V MIN being sufficient to drive a plurality of micro light emitting diodes (uLEDs) of a uLED die using a plurality of uLED drivers;

identifying, by a controller coupled to the uLED drivers, a uLED of the plurality of uLEDs with a forward voltage (V f ) greater than V MIN ; and

altering, by the controller, a time of a rising edge of a pulse width modulation (PWM)-on time of the uLED such that V f of the uLED is less than V LED for the PWM-on time.

2. The method of claim 1 , further comprising further identifying, by the controller, that the PWM on time of the uLED overlaps with a time at which the V LED is less than V f before altering the time of the rising edge.

3. The method of claim 1 , further comprising identifying, by the controller, that an amount of time V f is less than V LED is less than the PWM on time.

4. The method of claim 3 , further comprising, reducing the PWM on time and increasing a peak current of a pixel driver at the uLED driver of the uLED.

5. The method of claim 3 , further comprising causing, by the controller, V MAX and V MIN to increase in magnitude while maintaining a same frequency.

6. The method of claim 1 , wherein identifying that the PWM on time of the uLED overlaps with a time at which the V LED is less than V f includes determining respective times corresponding to rising edge and falling edges of the PWM on time based on a duty cycle of the uLED.

7. The method of claim 6 , wherein identifying the time PWM on time of the uLED overlaps with a time at which the V LED is less than V f includes using a frequency and a reference time indicating a time at which V LED equals V MAX or V MIN to identify one of the time of the rising edge or the falling edge overlaps with the time at which the V LED is less than V f .

8. The method of claim 1 , wherein a drive current of the uLED of the uLED die with V f greater than V MIN is modified such that an average drive current of the uLED is driven to a target average power.

9. A system comprising:

a power supply configured to provide an alternating current voltage (V LED ) with a minimum voltage (V MIN ) and a maximum voltage (V MAX ), V MIN sufficient to drive a majority of micro light emitting diodes (uLEDs) of a uLED die using uLED drivers of the uLED die; and

a controller coupled to the uLED drivers, the controller configured to:

identify a uLED of the uLEDs with a forward voltage (V f ) greater than V MIN and alter a time of a rising edge of a pulse width modulation (PWM) on time of the uLED such that V f of the uLED is less than V LED for the PWM on time.

10. The system of claim 9 , wherein the controller is further configured to identify that the PWM on time of the uLED overlaps with a time at which the V LED is less than V f before altering the time of the rising edge.

11. The system of claim 9 , wherein the controller is further configured to identify that an amount of time V f is less than V LED is less than the PWM on time.

12. The system of claim 11 , wherein the controller is further configured to reduce the PWM on time and increasing a peak current of a pixel driver at the uLED driver of the uLED.

13. The system of claim 11 , wherein the controller is further configured to cause V MAX and V MIN to increase in magnitude while maintaining a same frequency.

14. The system of claim 9 , wherein identifying that the PWM on time of the uLED overlaps with a time at which the V LED is less than V f includes determining respective times corresponding to rising edge and falling edges of the PWM on time based on a duty cycle of the uLED.

15. The system of claim 14 , wherein identifying the time PWM on time of the uLED overlaps with a time at which the V LED is less than V f includes using a frequency and a reference time indicating a time at which V LED equals V MAX or V MIN to identify one of the time of the rising edge or the falling edge overlaps with the time at which the V LED is less than V f .

16. A machine-readable medium including instructions that, when executed by a machine, cause the machine to perform operations comprising:

providing an alternating current voltage (V LED ) with a minimum voltage (V MIN ) and a maximum voltage (V MAX ), V MIN sufficient to drive a majority of micro light emitting diodes (uLEDs) of a uLED die using uLED drivers of the uLED die;

identifying a uLED of the uLEDs with a forward voltage (V f ) greater than V MIN ; and

altering a time of a rising edge of a pulse width modulation (PWM) on time of the uLED such that V f of the uLED is less than V LED for the PWM on time.

17. The machine-readable medium of claim 16 , wherein the operations further comprise further identifying that the PWM on time of the uLED overlaps with a time at which the V LED is less than V f before altering the time of the rising edge.

18. The machine-readable medium of claim 16 , wherein the operations further comprise identifying that an amount of time V f is less than V LED is less than the PWM on time.

19. The machine-readable medium of claim 18 , wherein the operations further comprise reducing the PWM on time and increasing a peak current of a pixel driver at the uLED driver of the uLED.

20. The machine-readable medium of claim 18 , wherein the operations further comprise causing V MAX and V MIN to increase in magnitude while maintaining a same frequency.