Patent ID: 8188683

Claim:
A poly-chromatic LED lighting system, comprises: a feed forward compensator, the feed forward compensator having a function of obtaining a related color temperature command, a luminance command, a luminaire power signal and an junction temperature signal of the poly-chromatic LED luminaire, to calculate and adjust a light power command of the poly-chromatic LED luminaire at any time; a feedback controller, the feedback controller having a function of stable control, which can minimizing an error signal between a feedback light power signal and the light power command, and generate a luminaire power signal of poly-chromatic luminaire in accordance with the error signal; a driver, the driver using a Pulse Width Modulation (PWM) method to drive the LED lamp, after the luminaire power signal being obtained, a driving power being emitted to turn on a poly-chromatic LED lamp, wherein the driver outputs a measured sampling signal to a time-division measuring device; a poly-chromatic LED luminaire having a lighting function, the poly-chromatic LED luminaire including a LED lamp and a luminaire mixing optical element; a temperature sensor, the temperature sensor being connected to the poly-chromatic LED luminaire, and being used to measure a generated temperature of the poly-chromatic LED luminaire; a voltage measuring device, the voltage measuring device having a function of measuring multiple sets of voltage, and measuring a forward voltage of the LED lamp; a time-division measuring device, the time-division measuring device receiving a measured sampling signal and synchronizing a voltage sampling action with the driver, measuring at least three sets of separated lighting luminance to obtain the feedback light power signal; and a wide-spectrum sensor, the wide-spectrum sensor having a function of sensing the luminance, measuring the feedback light power signal, and transmitting to the circuit between the feed forward compensator and the feedback controller; wherein the feed forward compensator connecting the feedback controller, the driver, the poly-chromatic LED luminaire and the time-division measuring device, the poly-chromatic LED luminaire connecting the wide-spectrum sensor, and the time-division measuring device connecting the wide-spectrum sensor, the temperature sensor being installed on the poly-chromatic LED luminaire, the voltage measuring device being connected between the LED lamp and the feed forward compensator, in order to form the poly-chromatic LED lighting system.