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. 15, 2014
Filed:
Nov. 07, 2011
Joong Ho Choi, Gyunggi-do, KR;
Yeun Joong Lee, Seoul, KR;
Deuk Hee Park, Gyunggi-do, KR;
Sang Hyun Cha, Seoul, KR;
Chang Seok Lee, Seoul, KR;
Joong Ho Choi, Gyunggi-do, KR;
Yeun Joong Lee, Seoul, KR;
Deuk Hee Park, Gyunggi-do, KR;
Sang Hyun Cha, Seoul, KR;
Chang Seok Lee, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Gyeonggi-do, KR;
University of Seoul Industry Cooperation Foundation, Seoul, KR;
Abstract
A fixture-compatible, dimmable illumination driving apparatus including: a rectifying unit rectifying a phase-controlled waveform of an alternating current (AC) power; a comparing unit comparing an output waveform of the rectifying unit with a first voltage according to a preset reference clock; a reference voltage generating unit generating a reference voltage corresponding to the number of high signals higher than the first voltage among outputs of the comparing unit during one cycle of the output waveform; and a pulse width modulation (PWM) signal generating unit generating a PWM signal from the reference voltage and a feedback voltage.