Patent ID: 8076858

Claim:
A light sensing method for luminaire calibration, comprising: storing an ideal intensity value of each channel of a plurality of light-emitting diodes (LED); synchronizing initial base frequencies of the LEDs for ensuring synchronization of light signals of channels of the LEDs by aligning rising edges of the light signals according to a base clock; modulating illuminating frequencies of the LEDs in a predetermined sequence, based on a switching cycle of a light sensing unit; activating and de-activating the light sensing unit periodically; sensing the light signal of the channel of each LED in the predetermined sequence by the light sensing unit; modulating the modulated illuminating frequencies of the LEDs to reach their corresponding initial base frequencies in the predetermined sequence; configuring the switching cycle to ensure the light signal from only one channel is sensed at one time; and executing a calibration according to a comparison between the sensed light signal of each channel and the ideal intensity value.