Patent ID: 9345094
Filing Date: 2016-05-17
CPC Classification: H05B

Claim Text:
1. A dimmable alternating current (AC) driven light emitting diode (LED) illuminating apparatus comprising: a dimmer configured to generate controlled AC power according to a selected dimming level; a rectifying unit configured to full-wave rectify the controlled AC power to generate a driving voltage; a dimming level detecting unit configured to detect the selected dimming level and output a detected dimming level signal; LED groups that each comprise at least one LED; and an LED driving module configured to detect the voltage level of the driving voltage and sequentially drive the LED groups according to the detected voltage level, by constantly controlling an LED driving current applied to a driven LED group, based on the dimming level signal, wherein the LED driving module determines a reference value of the LED driving current in proportion to a magnitude of the dimming level signal and controls a maximum value of the LED driving current based on the determined reference value.