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:
Nov. 05, 2013
Filed:
Apr. 22, 2011
Yoshio Fujimura, Gunma, JP;
Shinichi Yamamoto, Gunma, JP;
Feng Xu, Gunma, JP;
ON Semiconductor Trading, Ltd., Hamilton, BM;
Abstract
A control circuit of a light-emitting element comprises a rectifying unit (), a switching element (), a transformer () having a first winding (L) which generates a magnetic field using a current controlled by switching of the switching element (), a second winding (L) which is magnetically coupled to the first winding (L) and which generates a current flowing to an LED (), and a third winding (L) which is magnetically coupled to the first winding (L) and which generates a voltage (Sfbk), and an averaging capacitor () which averages a voltage derived by superposing a voltage (Srec) rectified by the rectifying unit () and the voltage (Sfbk), and a voltage averaged by the averaging capacitor () is applied to the first winding (L), so that light is emitted from the LED ().