Trigger circuit, light apparatus comprising the same and trigger method
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United States of America Patent
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Feb 6, 2018
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N/A
app pub date -
Jul 14, 2016
filing date -
Jul 20, 2015
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Abstract
A trigger circuit includes an off-time controller configured to receive a sensing voltage by sensing a driving current and to compare the sensing voltage to first and second certain voltages that are close to a zero voltage value and symmetrical to the zero voltage value to control a turn-off time of a driving switch in order for the sensing voltage to correspond to the zero voltage value at the turn-on time point of the driving switch and a switching controller configured to provide a switching control signal for turning on the driving switch at the turn-on time point of the driving switch.
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