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US 2015/0028748 A1Published application
Active flicker cancellation in lighting systems
AssigneeTerraLUX, Inc.
InventorArthur Lionel Stevens
Life of this patent
Estimating the term…
Abstract
Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.
Claims21
A system for compensating for disturbances in light output by a light source, the system comprising:
- a light sensor configured for sensing light output by a light source and for generating a light-sense signal based thereon;
- a compensator circuit configured for:
- (i) detecting at least one characteristic of a time-varying disturbance in the light-sense signal;
- and
- (ii) generating a compensating output signal based at least in part thereon;
- and
- a driver circuit configured for driving an LED in accordance with the output signal to thereby compensate for the time-varying disturbance,
- wherein the compensator circuit comprises at least one of a repetitive controller, an iterative-learning controller, or run-to-run controller.
5 more elements
(canceled)
A method for compensating for disturbances in light output by a light source, the method comprising:
- sensing light output by a light source and generating a light-sense signal based thereon;
- detecting a time-varying disturbance in the light-sense signal;
- generating a compensating output signal based at least in part thereon;
- and
- driving an LED in accordance with the output signal to thereby compensate for the time-varying disturbance,
- wherein the disturbance is aperiodic and a negative feedback controller is configured for generating the output signal based on iterative learning of the disturbance.
3 more elements
(canceled)
Dependencies are inferred from the claim text.