专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20120019714A1 LED LIGHTING DEVICE WITH CHOPPER CIRCUIT AND DIMMING CONTROL METHOD 有权
标题翻译：具有切割电路的LED照明装置和调光控制方法
公开(公告)号：US20120019714A1
公开(公告)日：2012-01-26
申请号：US13187321
申请日：2011-07-20
申请人： AKINORI HIRAMATU , HIROMITSU MIZUKAWA
发明人： AKINORI HIRAMATU , HIROMITSU MIZUKAWA
IPC分类号： H04N5/225 , H05B37/02
CPC分类号： H05B37/0281 , H05B33/0815 , Y02B20/42
摘要： A lighting device is provided for lighting control of an LED module based on an externally provided dimming control signal. A chopper circuit includes a switch coupled across a DC input and an inductor which receives and stores energy when the switch is turned on, and discharges energy to the LED module when the switch is turned off. A control circuit determines a current value to the switch, and compares the current value to a predetermined value. During normal operation, the switch is turned off when the detected current value reaches the predetermined value and turned back on when inductor discharge has completed. During a dimming operation, the normal operation is intermittently disabled in accordance with the dimming control signal. The dimming control signal may be a low-frequency PWM signal, with the lighting output being dimmed as a result of a duty ratio of the PWM signal.
摘要翻译：提供照明装置，用于基于外部提供的调光控制信号对LED模块进行照明控制。斩波电路包括耦合在DC输入端的开关和当开关导通时接收和存储能量的电感器，并且当开关断开时，将能量放电到LED模块。控制电路确定开关的当前值，并将当前值与预定值进行比较。在正常工作期间，当检测到的电流值达到预定值时，开关断开，当电感放电完成时，开关转向导通。在调光操作期间，根据调光控制信号间歇地禁用正常操作。调光控制信号可以是低频PWM信号，由于PWM信号的占空比，照明输出变暗。

IPRDB

热门服务

关于我们

友情链接

联系方式