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:
Sep. 23, 2003
Filed:
Feb. 11, 2002
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A capacitor C and a switch element SG are provided in the primary side of a transformer TT in a start-up circuit Charge stored in the capacitor C is discharged when the switch element SG is turned on. A capacitor C and a rectifying element D are inserted between the output of a DC-AC converting circuit and ground. The capacitor C is charged by a current flowing in the forward direction of a rectifying element D A capacitor C and a rectifying element D are inserted between a node between the secondary winding T of a transformer T and a rectifying element D which form a DC-DC converting circuit and a node on a line connecting the second capacitor C and the rectifying element D The capacitor C is charged by a current flowing in the direction as defined by the third rectifying element D A node between the capacitor C and the rectifying element D is connected to a voltage supplying line to the capacitor C of the start-up circuit whereby its charge is stored.