Patent ID: 9521721
Filing Date: 2016-12-13
CPC Classification: H05B

Claim Text:
1. An illumination device comprising: a number of LEDs emitting light; means for receiving an input signal indicative of at least one of a color and a brightness; and means for generating an activation signal for at least one of said LEDs based on said input signal, wherein the illumination device comprises: wherein the means for generating said activation signal is adapted to generate said activation signal based on said voltage, said current and a current-voltage model related to said at least one LED, wherein said current-voltage model defines a relationship between said current, said voltage and colorimetric properties of said light emitted by said at least one LED, wherein said colorimetric properties comprise values describing at least one of a color and spectra of said light, wherein said relationship is defined by a look up-table comprising a number of measured calibration points, and wherein each of said calibration points comprise a measured voltage across said LED, a measured current through said LED and measured colorimetric properties related to said light emitted by said LED.