Patent ID: 8803444

Claim:
A method of controlling illumination characteristics of a plurality of lighting segments, comprising steps of: providing driving currents to each lighting segment; detecting an illumination intensity and/or color of lights emitted from each lighting segment; adjusting the driving currents of each lighting segment respectively with a set of driving signals so as to adjust the illumination intensity and/or color of each lighting segment in accordance with an predetermined illumination setting, wherein each set of driving signals has a unique period feature which is distinguished from that of other sets of driving signals corresponding to other lighting segments, and each set of driving signals is in response to the detected illumination intensity and/or color of the light emitted from each corresponding lighting segment; wherein, each lighting segment comprises at least one independently controlled LED array of different color from that of the other LED arrays in the same lighting segment, and the driving current of each LED array is adjusted by an individual driving signal in the same set of driving signals, each driving signal in the same set comprises the same period feature; and wherein, the individual driving signal is amplitude modulated signal or duty cycle modulated signal.