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:
Jan. 21, 2014
Filed:
Feb. 16, 2011
Gye-hyun Cho, Bucheon, KR;
Min-ho Jung, Bucheon, KR;
Sung-yun Park, Bucheon, KR;
Dong-hwan Kim, Bucheon, KR;
Gye-Hyun Cho, Bucheon, KR;
Min-Ho Jung, Bucheon, KR;
Sung-Yun Park, Bucheon, KR;
Dong-Hwan Kim, Bucheon, KR;
Fairchild Korea Semiconductor Ltd., Bucheon, KR;
Abstract
The present invention relates to a switching operation control device of a power switch, an LED light emitting device including the same, and a control method thereof. The control device detects a zero crossing time when a voltage at an input end of the power switch becomes a zero voltage, generates a reference signal that is synchronized with the voltage at the input end of the power switch by using the detected zero crossing time, and compensates the generated reference signal with a first voltage that is greater than the zero voltage during a blocking period corresponding to the zero crossing time.