POWER SUPPLY FOR LIGHT EMITTING DIODE ROADWAY LIGHTING FIXTURE
摘要
A high efficiency light emitting diode power supply for roadway lighting fixtures is provided. The power supply enables conditioning and monitoring of input power and monitors LEDs current to ensures consistent performance of the LED by changing a power correction factor. The LED output can also be adjusted based upon age or external input parameters and by modifying the power correction factor value. In addition, the LED output can be dimmed, turned down in output to a lower level at any time of night for a prescribed duration in order to further save energy. This dimming function uses a programming scheme that keeps track of the "seasons" (summer, fall, winter and spring) so that time of night is tracked accurately all year long.
申请公布号
WO2010085882(A1)
申请公布日期
2010.08.05
申请号
WO2010CA00110
申请日期
2010.01.26
申请人
LED ROADWAY LIGHTING LTD.;JOSEFOWICK, JACK, YITZHAK;WINTERS, ALAN, SHAWN;CHEN, QIUNING;NEARY, MARK, ADAM
发明人
JOSEFOWICK, JACK, YITZHAK;WINTERS, ALAN, SHAWN;CHEN, QIUNING;NEARY, MARK, ADAM