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. 31, 1984
Filed:
Dec. 28, 1981
Applicant:
Inventors:
Assignee:
Toshiba Electric Equipment Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
363 56 ; 3152 / ; 363 97 ;
Abstract
Base current is supplied from a base driving circuit to bases of paired inverter transistors through a transistor, and an inverter circuit oscillates at a rated output. When the operation of an electric discharge lamp becomes abnormal, an IC-ed control circuit is rendered operative responsive to output of an abnormality detecting circuit to turn the transistor ON and a transistor OFF, and the operation of inverter circuit is thus stopped. A capacitor in an auxiliary power source is charged by output of the base driving circuit and the control circuit is driven responsive to output of auxiliary power source when the inverter circuit is left inoperative.