首页>
外国专利>
LIGHT-EMITTING DIODE LIGHTING DEVICE WITH SYNCHRONIZED PWM DIMMING CONTROL
LIGHT-EMITTING DIODE LIGHTING DEVICE WITH SYNCHRONIZED PWM DIMMING CONTROL
展开▼
机译：具有同步PWM调光控制的发光二极管照明设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
An LED lighting device includes a luminescent circuit, a detecting circuit, an adjustable current source and a dimming control circuit. The luminescent circuit is driven by a rectified AC voltage for providing light. The detecting circuit is configured to detect a rising edge or a falling edge of the LED current associated with a frequency of the rectified AC voltage. The dimming current regulator is configured to vary a duty cycle of the LED current according to a PWM signal. The dimming control circuit is configured to generate the PWM signal and synchronize a frequency of the PWM signal with the frequency of the rectified AC voltage at the detected rising edge or the falling edge of the rectified AC voltage.
展开▼
