Patent ID: 9474117
Filing Date: 2016-10-18
CPC Classification: H05B,Y02B

Claim Text:
1. A light emitting diode (LED), comprising: a driving control unit configured to control driving of light emitting groups according to a voltage level of a rectified voltage, the driving control unit comprising: a voltage edge detector configured to detect a variation of an input rectified voltage, and output a first control signal corresponding to the variation of the rectified voltage to a control logic; a reference voltage generator configured to generate a reference voltage according to a reference voltage setting signal output from the control logic; a comparator configured to compare the reference voltage with the rectified voltage, and output a second control signal to the control logic, wherein the control logic is configured to control driving the light emitting groups by detecting the first control signal and the second control signal, and output the reference voltage setting signal, and wherein the control logic is configured to generate a reference voltage adjustment value based on the first control signal to compensate for a signal processing delay within the driving control unit, and set the reference voltage setting signal based on a threshold voltage of the light emitting groups and the reference voltage adjustment value.