US 8,076,870 B2Granted

LED illumination system with multiple independent loops

AssigneeAlliance Optotek Co., Ltd.

InventorsChien-Lung Wang, Chih-Wei Chen, Ching-Hsien Lin

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Abstract

A LED illumination system with multiple independent loops includes an input unit provided to receive a D.C. voltage, and a plurality of light module control circuits electrically connected to the input unit. Each of the light module control circuits includes a light module controller and two filtering units. The two filtering units are electrically connected to the light module controller, and receive D.C. power transmitted form the input unit to drive two set of LED illuminators, respectively. The light module controller controls current of the two set of LED illuminators via the two filtering units so as to control brightness of the LED illuminators, respectively. Therefore, the LED illuminators are controlled by the independent loops to reduce mutual influence among the LED illuminators.

Claims7

Dependent claims

A LED illumination system with multiple independent loops driving a plurality of LED illuminators, the LED illumination system comprising:

an input unit receiving a D.C. power;
and
a plurality of light module control circuits electrically connected to the input unit;
wherein each of the light module control circuits includes:
a light module controller;
and
two filtering units electrically connected to the light module controller and receiving the D.C. power, and the two filtering units electrically connected to two set of LED illuminators, respectively;
wherein the light module controller is provided to control the LED illuminators via the filtering units so as to control brightness of the LED illuminators,
wherein each of the light module control circuits further comprises:
at least one voltage-current-temperature feedback unit connected between the LED illuminator and the light module controller to feedback a voltage-current-temperature signal.

7 more elements

Dependencies are inferred from the claim text.