公开(公告)号：US20120019158A1

公开(公告)日：2012-01-26

申请号：US12804493

申请日：2010-07-22

申请人： Chung-Shu Lee ,  Shih-Chang Lee ,  Chih-Kuan Lin ,  Chao-Ching Hsu

发明人： Chung-Shu Lee ,  Shih-Chang Lee ,  Chih-Kuan Lin ,  Chao-Ching Hsu

IPC分类号： H05B37/02

CPC分类号： H05B33/0884 ,  H05B33/0851

摘要： A polarity-reversible dimming controller having function of switching light source has a power supply module and a dimming control module. The dimming control module receives an external PWM dimming signal to control a feedback signal of the power supply module so as to dim or power on/off an LED lamp. The dimming control module has an output current switching circuit, a switch control circuit and a dimming control circuit. The output current switching circuit performs a PWM control over a current outputted from the power supply module by using the external PWM dimming signal to maintain chromacity of the LED lamp as a constant. The switch control circuit turns off the PWM controller to enter a standby mode for saving power once the PWM dimming signal exceeds a threshold value. As a full-wave rectification is performed on the PWM dimming signal, the polarity match issue upon assembling can be disregarded.

摘要翻译： 具有切换光源功能的极性可逆调光控制器具有电源模块和调光控制模块。 调光控制模块接收外部PWM调光信号，以控制电源模块的反馈信号，以使LED灯变暗或加电。 调光控制模块具有输出电流切换电路，开关控制电路和调光控制电路。 输出电流切换电路通过使用外部PWM调光信号对从电源模块输出的电流进行PWM控制，以将LED灯的色度维持为常数。 一旦PWM调光信号超过阈值，开关控制电路关闭PWM控制器进入待机模式，以节省电力。 由于对PWM调光信号进行全波整流，因此可以忽略组装时的极性匹配问题。