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:
Aug. 05, 2014
Filed:
Dec. 27, 2011
Yi-chuan Chen, New Taipei, TW;
Yi-Chuan Chen, New Taipei, TW;
Vivotek Inc., New Taipei, TW;
Abstract
A light source driving device includes a light source unit, a driving unit, a voltage converting unit, a detecting unit, and a feed-back control unit. The driving unit is used to receive an input signal, and convert the input signal to a driving signal for output according to an enable signal and a feed-back signal. The voltage converting unit is used to convert the driving signal to a driving voltage, so as to output the driving voltage to a first end of the light source unit. The detecting unit is coupled to a second end of the light source unit, and used to detect an output current of the light source unit, so as to generate a detecting voltage. The feed-back control unit generates the feed-back signal according to the detecting voltage and a pulse width modulation signal.