Patent ID: 9736903
Date: 2017-08-15
CPC Classifications: G01J,H05B

Claim:
1. A method for calibrating a phosphor converted LED, which is included within an illumination device along with a first photodetector and a second photodetector, the method comprising: successively applying at least three different drive currents to the phosphor converted LED to produce illumination at different levels of brightness upon subjecting the phosphor converted LED to a first ambient temperature; measuring photocurrents induced on the first and second photodetectors by the illumination produced by the phosphor converted LED at each of the at least three different drive currents; measuring forward voltages that develop across the first and second photodetectors before or after each induced photocurrent is measured; and storing results of the measuring steps within the illumination device to calibrate the phosphor converted LED at the first ambient temperature.