发明名称 |
LED illumination system with a power saving feature |
摘要 |
An LED illumination system includes a control circuit having a timing unit, a control unit and a PWM signal generating unit. The timing unit divides an operating period of an LED lamp into a plurality of time segments, and outputs a clock signal at a start of each time segment to the control unit. The control unit outputs different controlling signals corresponding to the clock signals to the PWM signal generating unit, which in turn generates different PWM signals with different duty cycles. A constant current circuit electrically connects the control circuit to the LED lamp. The constant current circuit outputs different electric currents to the LED lamp according to the PWM signals, to thereby control the LED lamp to emit light having different light intensities at the various time segments of the operating period.
|
申请公布号 |
US8362714(B2) |
申请公布日期 |
2013.01.29 |
申请号 |
US20100696000 |
申请日期 |
2010.01.28 |
申请人 |
FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD.;FOXCONN TECHNOLOGY CO., LTD.;KU CHIN-LONG;ZHANG DA-PENG |
发明人 |
KU CHIN-LONG;ZHANG DA-PENG |
分类号 |
H05B37/02;G05F1/00 |
主分类号 |
H05B37/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|