Patent ID: 7671539
Filing Date: 2010-03-02
Classification: H05B,Y02B

Abstract:
1. A system, comprising: a light-emitting diode; a detector of optical energy in optical communication with the light-emitting diode; and a controller communicatively coupled to the light-emitting diode, wherein the controller adjusts an output of the light-emitting diode in response to an output of the detector of optical energy; wherein the output of the detector of optical energy is a signal representative of an intensity of optical energy emitted by the light-emitting diode; and wherein the controller compares the signal representative of an intensity of the optical energy emitted by the light-emitting diode with a predetermined value and generates an error signal based on a difference between the signal representative of an intensity of the optical energy emitted by the light-emitting diode and the predetermined value, and the controller adjusts an output of the optical energy by the light-emitting diode in response to the error signal.