Patent ID: 9398650
Filing Date: 2016-07-19
CPC Classification: H05B,Y02B

Claim Text:
1. An LED lighting device using a ballast, the LED lighting device comprising: an LED unit including at least one LED device; and a rectifier configured to rectify a current power signal output from the ballast and transfer the rectified current power signal to the LED unit and selectively provide, based on an output frequency of the ballast, an open-circuit or a short-circuit between a main path for supplying power to the rectifier from the ballast and an auxiliary path for preheating a starter or filament of the ballast, wherein, when the ballast is a low-frequency ballast having an output frequency less than 60 Hz, the rectifier is configured to provide an open-circuit between the main path for supplying power to the rectifier from the ballast and the auxiliary path for preheating the starter or filament of the ballast, wherein, when the ballast is a high-frequency ballast having an output frequency greater than 20 kHz, the rectifier is configured to provide a short-circuit between the main path for supplying the power to the rectifier from the ballast and the auxiliary path for preheating the filament of the ballast.