ENERGY-SAVING ILLUMINATION APPARATUS AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Oct 10, 2013
app pub date -
May 19, 2012
filing date -
Apr 5, 2012
priority date (Note) -
Abandoned
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Abstract
An energy-saving illumination apparatus adapted to receive an input power includes a light unit, a detection unit, a dimming unit, and a control unit. The light unit has a plurality of light sets and a switch unit connecting the light sets in parallel and/or serial connections. The detection unit is for detecting the status of the input power. The dimming unit is for controlling the current of the light unit. The control unit is for controlling the switch unit according to the detection result of the detection unit and making the turn-on voltage of the light unit be changed along with the input power. The control unit controls duty cycle of pulse width modulation (PWM) signal and transmits the PWM signal to the dimming unit. The dimming unit adjusts the current which conducts and makes the light unit emit light to be changes along with the duty cycle.
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