Patent ID: 8405671

Claim:
A color controller for a luminaire, the color controller comprising: a thru-converter arranged to convert an input signal to at least one luminaire drive signal; an illumination sampler arranged to sample an optical output from the luminaire and generate a representation thereof; and a feedback controller arranged to receive said output representation and generate an updatable conversion factor in cooperation with a calibration luminance and color values, wherein said thru-converter arrangement is responsive to a trigger signal to operate in one of a first mode and a second mode different than said first mode, wherein in said first mode said thru-converter is arranged to generate said luminaire drive signal for the luminaire in an open loop responsive to said input signal being a frame luminance signal and target color signals, wherein said conversion to said at least one luminaire drive signal is responsive to the updatable conversion factor and not responsive to the optical output from the luminaire generated during said first mode operation, and wherein in said second mode said thru-converter is arranged to generate said luminaire drive signal for the luminaire in a closed loop responsive to said feedback controller, said input signal being the calibration luminance and color values, said feedback controller responsive to said output representation of the optical output of the luminaire, the optical output of the luminaire generated during said second mode operation.