Patent ID: 7893633

Claim:
A control device for controlling a variable-colour light source, the variable-colour light source comprising a plurality of individually controllable colour light sources; where the control device is responsive to an input signal, which input signal is indicative of a colour and a brightness, where the control device comprises a control unit for generating, respective activation signals for each of the individually controllable colour light sources; which control unit comprises predetermined calibration data indicative of at least one calibration colour vector in a predetermined colour space and at least one brightness response mapping for each of the individually controllable colour light sources, wherein the control unit is configured to generate the activation signals from the input signal in relation to the predetermined calibration data; wherein the control device is configured to obtain an input colour vector indicative of the received colour and brightness; to determine at least one component of the input colour vector along at least one of the calibration colour vectors; and to apply a corresponding one of the brightness response mapping resulting in a corresponding one of the activation signals.