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:
Jun. 24, 2003
Filed:
Dec. 06, 2001
Applicant:
Inventors:
Assignee:
Koito Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/700 ;
U.S. Cl.
CPC ...
H05B 3/700 ;
Abstract
In a lighting circuit, a lighting control circuit of a discharge lamp and a starting circuit for supplying a starting pulse to the discharge lamp are provided and also, electric power and the starting pulse are supplied through a socket connected to the discharge lamp. The starting circuit provided within the socket has a transformer, a capacitor connected to a primary winding of the transformer and a self-breakdown type switch element. It is constructed so that a feeding path to the capacitor is formed to charge the capacitor only when the discharge lamp is connected to the socket and a connection between a first terminal and a third terminal is made.