发明名称 |
Illumination driving apparatus |
摘要 |
A fixture-compatible, dimmable illumination driving apparatus including: a rectifying unit rectifying a phase-controlled waveform of an alternating current (AC) power; a comparing unit comparing an output waveform of the rectifying unit with a first voltage according to a preset reference clock; a reference voltage generating unit generating a reference voltage corresponding to the number of high signals higher than the first voltage among outputs of the comparing unit during one cycle of the output waveform; and a pulse width modulation (PWM) signal generating unit generating a PWM signal from the reference voltage and a feedback voltage. |
申请公布号 |
US8779682(B2) |
申请公布日期 |
2014.07.15 |
申请号 |
US201113290738 |
申请日期 |
2011.11.07 |
申请人 |
Samsung Electro-Mechanics Co., Ltd.;University of Seoul Industry Cooperation Foundation |
发明人 |
Choi Joong Ho;Lee Yeun Joong;Park Deuk Hee;Cha Sang Hyun;Lee Chang Seok |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
代理机构 |
McDermott Will & Emery LLP |
代理人 |
McDermott Will & Emery LLP |
主权项 |
1. An illumination driving apparatus comprising:
a rectifying unit rectifying a phase-controlled waveform of an alternating current (AC) power; a comparing unit comparing an output waveform of the rectifying unit with a first voltage according to a preset reference clock; a reference voltage generating unit sequentially storing outputs of the comparing unit, and generating a reference voltage corresponding to the number of high signals higher than the first voltage among the sequentially stored outputs of the comparing unit during one cycle of the output waveform; and a pulse width modulation (PWM) signal generating unit generating a PWM signal from the reference voltage and a feedback voltage, wherein the reference voltage generating unit includes:
a shift register sequentially storing the outputs of the comparing unit output according to the reference clock;a register storing data corresponding to one cycle of the output waveform when the data is stored in the shift register; anda voltage generating unit generating the reference voltage based on a value of the data stored in the register. |
地址 |
Suwon, Gyeonggi-do KR |