Patent ID: 9661706
Date: 2017-05-23
CPC Classifications: H05B

Claim:
1. A dimmable lighting device, comprising: at least one light emitting diode (LED); an LED driver configured to develop a driving current to power the at least one LED; and a dimming control circuit comprising a shunt load, said dimming control circuit being configured to divert current from said at least one LED through said shunt load in response to the driving current being below a low intensity threshold level; wherein an LED current magnitude through said at least one LED is equal to the driving current when the driving current is above the threshold level, the LED current magnitude changes according to a step function when the driving current is at the threshold level, and the LED current magnitude comprises a linear characteristic when the driving current is below the threshold level; and wherein the relationship between the LED current magnitude and the driving current is different when the driving current is above the threshold level as compared to the relationship between the LED current magnitude and the driving current when the driving current is below the threshold level.