LED CONTROL METHOD
3 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, an LED system is controlled to have a substantially unity power factor.
15 Citations
20 Claims
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16. A method of forming an LED system comprising:
configuring a control system to operate a PWM controller to control a current through a plurality of series coupled LEDs to a substantially constant value wherein the PWM controller is configured to operate with a substantially constant frequency and a substantially constant duty cycle. - View Dependent Claims (17, 18, 19)
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20. A method of forming an LED system comprising:
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configuring the LED system in a boost configuration; coupling a plurality of LEDs in series; and configuring the LED system to form a waveform of an input current to the LED system to be substantially equal to a current waveform through a power switch that regulates current through the plurality of LEDs wherein the power switch operates at a substantially constant frequency and a substantially constant duty cycle.
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Specification