Patent ID: 7830100
Filing Date: 2010-11-09
Classification: G02F,H05B

Abstract:
1. A system for driving a plurality of lamps modules, comprising: an inverter circuit to provide power to a plurality of lamps of the lamps modules; an interface to convey the power to the plurality of the lamps; a splitter to receive the power provided by the inverter circuit through the interface and distribute the power to the plurality of lamps; a balance unit to balance current flowing through the lamps; and a fault detecting circuit to detect and report an abnormality condition of at least one of the lamps by detection of a current signal output from the inverter, wherein the inverter generates current as two driving signals to drive two sets of the lamps in the lamps module, the fault detecting circuit detects variance of the driving signals caused by a faulty lamp, to detect the abnormality condition of the lamps, the inverter comprises at least two transformers to provide power to two sets of the lamps, each transformer comprises a secondary winding, each transformer comprises a low voltage end, the low voltage ends of the different transformers are connected to each other at a node after correspondingly passing through a detecting resistor, the node is grounded via another detecting resistor, the fault detecting circuit comprises a voltage detecting circuit connecting to each detecting resistor for detecting the voltage variance of the detecting resistors.