Patent ID: 9013467
Filing Date: 2015-04-21
Classification: H05B

Abstract:
1. A method for operating a LED lighting system at a target output color, the LED system having three or more LED emitters emitting light of different colors, each LED emitter being operable at a controllable emitter drive setting and having a junction temperature, the method comprising the steps of: a) providing calibration data for each LED emitter at a plurality of values of the corresponding emitter drive setting and at a plurality of values of the corresponding junction temperature; b) executing a drive recursion loop calculating the drive setting of each emitter based on an input value for the junction temperature of each emitter and in view of the target output color and of the calibration data; c) applying the drive settings obtained at step b) to the LED emitters; d) determining an operation value for the junction temperature of each LED emitter; e) executing the drive recursion loop calculating the drive setting of each emitter using the operation value of the junction temperature of each emitter as the input temperature value therefor; f) applying the drive settings obtained at step e) to the LED emitters; and g) repeating steps d) to f) for a predetermined number of times.