Patent ID: 7615939
Filing Date: 2009-11-10
Classification: H01L,H05B

Abstract:
1. A lighting system, comprising: (a) an LED; (b) a current regulator circuit (i) in communication with said LED and (ii) comprising: (A) a drive unit in series with said LED; (B) a current sensor in communication with said drive unit and said LED; (C) an adjusted voltage source with an output; and (D) a comparison unit in communication with said drive unit, said current sensor, and said adjusted voltage source wherein said comparison unit is operable to generate an output to said drive unit that generates a voltage across said current sensor approximately equal to that of said output of said adjusted voltage source; (c) a calibration circuit in communication with said current regulator; and (d) a controller in communication with said comparison unit, wherein said controller is operable to generate a signal to activate or deactivate said comparison unit.