Arbitrary pulse alignment to reduce LED flicker
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United States of America Patent
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Feb 27, 2018
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app pub date -
Jun 6, 2017
filing date -
Jul 23, 2015
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Abstract
An arbitrary alignment is provided for a series of pulses controlling a switch that in turn controls a current in an LED. Each pulse is generated according to a target time responsive to a reference time in a corresponding cycle of a synchronization clock. Each pulse has a leading portion that precedes its target time and a trailing portion subsequent to its target time. The arbitrary alignment defines the relative size of the leading portion to the trailing portion such that these relative sizes are incrementally changed across successive ones of the pulses.
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