Generation from phase cut dimmer output with fast response to changes in dimmer position
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United States of America Patent
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Sep 15, 2015
Grant Date -
Apr 12, 2012
app pub date -
Oct 6, 2011
filing date -
Oct 7, 2010
priority date (Note) -
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Abstract
A circuit for a dimmer system is disclosed, in which a phase-cut dimmer output signal is converted to a dimming control level signal. The phase-cut dimmer output signal is used to generated a pulse modulated signal indicative of the duty cycle of the phase cut dimmer output signal, and the pulse modulated signal is directly converted to a piece-wise linear dimming control level signal. By directly converting the pulse modulated signal to a piece-wise linear dimming control level signal, no further processing is necessary to produce a dimming signal which closely resembles the ideal logarithmic response of the human eye.
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