LIGHT-EMITTING DIODE DEVICE

摘要

A light-emitting diode (LED) device including an LED module and a driver is provided. The LED module includes a voltage sensing module and an LED. The voltage sensing module generates a reference voltage. The driver includes a power converting module, a current processing module, a feedback module and a controller module. The power converting module converts an alternating current (AC) into a driving current for driving the LED to emit a light. The current processing module converts the driving current into a sensing voltage. The feedback module compares the sensing voltage with a reference voltage and outputs a level signal according to a magnitude relationship of the sensing voltage and the reference voltage. The controller module outputs a pulse width modulation (PWM) signal to the power converting module according to the level signal. The power converting module controls the magnitude of the driving current according to the PWM signal.

主权项

1. A light-emitting diode (LED) device, comprising:
an LED module, comprising:
a voltage sensing module configured to generate a reference voltage; andan LED; a driver, comprising:
a power converting module configured to receive and convert an alternating current (AC) into a driving current for driving the LED to emit light;a current processing module configured to convert the driving current into a sensing voltage;a feedback module configured to compare the sensing voltage with a reference voltage and output a level signal according to a magnitude relationship of the sensing voltage and the reference voltage; anda controller module configured to output a pulse width modulation (PWM) signal to the power converting module according to the level signal; wherein, the power converting module is further configured to control a magnitude of the driving current according to the PWM signal.