Light source driving device

Details Light source driving device Light source driving device

2006-12-29

2010-02-23

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S207000, C315S224000, C315S274000

Reexamination Certificate

active

07667412

ABSTRACT:
A driving device for driving a light source module (12), includes an inverter circuit (15) for converting a received signal to a signal driving the light source module, a feedback and filter circuit (13) for feeding back currents flowing through the light sources and filtering radio frequency interference (RFI) signals of feedback currents, and a controller (14) electrically connected between the feedback and filter circuit and the inverter circuit. The feedback and filter circuit includes at least one filter for filtering the RFI signals of the feedback currents, and a resistor (R) for feeding back the current flowing through the light source module. The filter includes an impedance (Z11) including a first terminal designated as an input of the filter and a second terminal, and a capacitor (C11). The capacitor includes a third terminal designated as an output of the filter and a fourth terminal electrically connected to ground.

REFERENCES:
patent: 6495972 (2002-12-01), Okamoto et al.
patent: 7164240 (2007-01-01), Moyer et al.
patent: 2003/0201967 (2003-10-01), Yu
patent: 2004/0217719 (2004-11-01), Higuchi
patent: 2006/0091820 (2006-05-01), Jang

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