Patent ID: 9653018
Date: 2017-05-16
CPC Classifications: G09G,H05B,Y02B

Claim:
1. A light emitting diode (LED) driving device comprising: a power source supplying alternating current (AC) voltage; a rectification unit communicatively coupled to the power source and rectifying the AC voltage supplied from the power source; a driving signal generator configured to receive the rectified voltage from the rectification unit and generate a primary driving signal using the rectified voltage; an LED driving signal modulation unit communicatively coupled to the driving signal generator, the LED driving signal modulation unit configured to receive the primary driving signal and generating a secondary pulse driving signal through a modulation of the primary driving signal; a selector communicatively coupled to the driving signal generator and the LED driving signal modulation unit, the selector configured to receive the primary driving signal and the secondary pulse driving signal and output only one of the primary driving signal and the secondary pulse driving signal to the LED groups, wherein at least one LED group from the plurality of LED groups is configured to repeatedly turn on and turn off in responsive to transitions of the secondary pulse driving signal between a low level and a high level.