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:
Jul. 12, 2011
Filed:
Sep. 06, 2007
Tsai-fu Wu, Hsinchu, TW;
Chang-yu Wu, Hsinchu, TW;
Chin-feng Kang, Hsinchu, TW;
Che-yi Su, Hsinchu, TW;
Tsai-Fu Wu, Hsinchu, TW;
Chang-Yu Wu, Hsinchu, TW;
Chin-Feng Kang, Hsinchu, TW;
Che-Yi Su, Hsinchu, TW;
Analog Integrations Corporation, Hsinchu, TW;
Abstract
A control circuit of a driving circuit for controlling a light emitting diode (LED) light source having a plurality of areas is provided. The control circuit includes the error amplifiers receiving a feed back current signal and a external reference voltage, and generating an error signal; a buffer register receiving a serial digital signal and generating the parallel digital signals; a work register receiving the parallel digital signals and a trigger signal, and outputting the parallel digital signals when the trigger signal is at a relatively high level; and a switch module having the power switches, each of which receives the error signal and the parallel digital signal for generating a driving signal to control a driving current of a specific area of the light source, in order to control the brightness in each area of the LED light source.