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:
Oct. 06, 2009
Filed:
Jul. 26, 2006
Applicants:
Shigeki Harada, Tokyo, JP;
Taichiro Tamida, Tokyo, JP;
Akihiko Iwata, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lamp lighting apparatus includes an arc spot movement detector () for monitoring an DC voltage Vb which is the bus voltage of an inverter (), and for detecting a movement of an arc spot which appears before a lampenters a state where human beings can recognize a flicker of the lamp (), and, when the arc spot movement detector () detects a movement of the arc spot, controls a switch () of a DCDC converter () so as to suppress the movement of the arc spot.