The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2010
Filed:
Dec. 29, 2006
Tsung-liang Hung, Taipei Hsien, TW;
Chi-hsiung Lee, Taipei Hsien, TW;
Tsung-Liang Hung, Taipei Hsien, TW;
Chi-Hsiung Lee, Taipei Hsien, TW;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A driving device for driving a light source module (), includes an inverter circuit () for converting a received signal to a signal driving the light source module, a feedback and filter circuit () for feeding back currents flowing through the light sources and filtering radio frequency interference (RFI) signals of feedback currents, and a controller () 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 (Z) including a first terminal designated as an input of the filter and a second terminal, and a capacitor (C). The capacitor includes a third terminal designated as an output of the filter and a fourth terminal electrically connected to ground.