LIGHTING-DIMMING DEVICE CHOPPING POWER WAVEFORMS FOR ADJUSTING BRIGHTNESS
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United States of America Patent
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Issued Date -
Sep 5, 2013
app pub date -
Jul 31, 2012
filing date -
Mar 3, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A lighting-dimming device has a dimming module with an encoding function and at least one light module with a decoding function and controlled by the dimming module. The dimming module is designated with a required brightness and address command by a user. A triode AC switch of the dimming module is controlled to chop a power based on the required brightness and address command. The chopped power is transmitted to the light module to control the brightness of the light module. In the chopped power, only a part of cycles of the power is chopped and most of the power waveforms are maintained. Therefore, a high power factor is maintained.
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