Patent ID: 9392660
Filing Date: 2016-07-12
CPC Classification: H05B

Claim Text:
1. A method for calibrating an illumination device comprising at least a first emission light emitting diode (LED) and a photodetector, the method comprising: subjecting the illumination device to a first ambient temperature; successively applying a plurality of different drive currents to the first emission LED to produce illumination at different levels of brightness; obtaining wavelength and intensity measurement values for the illumination produced by the first emission LED at each of the different drive currents; measuring a forward voltage developed across the first emission LED by applying a non-operative drive current to the first emission LED before or after each of the different drive currents is applied to the first emission LED; and storing the forward voltage measurements and at least a subset of the wavelength and intensity measurements within a storage medium of the illumination device to characterize the first emission LED at the first ambient temperature.