Patent ID: 9198253
Filing Date: 2015-11-24
Classification: G03B,H04N,H05B

Abstract:
1. A semiconductor lighting apparatus comprising: a plurality of semiconductor light emitting devices for outputting light having different colors from each other; a synthesizing portion for synthesizing output light of said plurality of semiconductor light emitting devices and outputting synthesized light; an optical sensor for detecting a light quantity of an output of each of said semiconductor light emitting devices; a current control portion for supplying a driving current to each of said semiconductor light emitting devices; a temperature sensor for detecting an ambient temperature of each of said semiconductor light emitting devices; a temperature regulating portion for cooling each of said semiconductor light emitting devices; and a calculating portion that receives outputs of said optical sensor and said temperature sensor and previously prepared data to control said driving current to be supplied by said current control portion in such a manner that a light quantity detected by said optical sensor approximates to a predetermined target light quantity, and that calculates a target temperature of said semiconductor light emitting device to control said temperature regulating portion in such a manner that a temperature detected by said temperature sensor approximates to said target temperature.