Microled power considering outlier pixel dynamic resistance
AssigneeLumileds LLC
InventorsAntonio Lopez Julia, Zhi Hua Song
Life of this patent
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Abstract
Discussed herein are systems, devices, methods, and computer-readable media for reducing a number of undriven or underdriven uLEDs of a uLED die. A method can include identifying, by a controller of a micro light emitting diode (uLED) die, a dynamic series resistance (Rd) or forward voltage (Vf) of a uLED of the uLED die, selecting, by the controller and based on the identified Rd or Vf, a current level (IPWM_0) less than a maximum current level (IPWM_MAX) supplied by a uLED driver coupled to the uLED die, and causing, by the controller, current, at the selected current level, to be supplied to the uLED driver.
Claims20
A method comprising:
- identifying, by a controller of a micro light emitting diode (uLED) die, a dynamic series resistance (Rd) or forward voltage (Vf) of a uLED of the uLED die;
- selecting, by the controller and based on the identified Rd or Vf, a current level (IPWM_0) less than a maximum current level (IPWM_MAX) supplied by a uLED driver coupled to the uLED die;
- and
- causing, by the controller, an electrical current, at the selected current level, to be supplied to the uLED driver.
A system comprising:
- a micro light emitting diode (uLED) die comprising uLEDs and respective uLED drivers;
- a power supply coupled to the uLED die;
- and
- a controller coupled to the uLED die, the controller to provide a control command and configured to:
- identify, a dynamic series resistance (Rd) or forward voltage (Vf) of a uLED of the uLED die;
- select, based on the identified Rd or Vf, a current level (IPWM_0) less than a maximum current level (IPWM_MAX) supplied by a uLED driver of the uLED die;
- and
- cause the power supply to provide an electrical current at the selected current level to the uLED driver.
A machine-readable medium including instructions that, when executed by a hardware-based processor, cause a machine to perform operations comprising:
- identifying, by a controller, a dynamic series resistance (Rd) or forward voltage (Vf) of a micro light emitting diode (uLED) of a uLED die;
- select, by the controller, based on the identified Rd or Vf, a current level (IPWM_0) less than a maximum current level (IPWM_MAX) supplied by a uLED driver of the uLED die;
- and
- cause, by the controller, a power supply to provide an electrical current at the selected current level to the uLED driver.
Dependencies are inferred from the claim text.