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:
Apr. 17, 2007
Filed:
Oct. 27, 2005
Hiroshi Maeda, Tokyo, JP;
Satoshi Shinbo, Tokyo, JP;
Masahiro Gamou, Tokyo, JP;
Satoshi Sugimoto, Tokyo, JP;
Nobuo Kitajima, Tokyo, JP;
Terumasa Toyoda, Tokyo, JP;
Hiroshi Maeda, Tokyo, JP;
Satoshi Shinbo, Tokyo, JP;
Masahiro Gamou, Tokyo, JP;
Satoshi Sugimoto, Tokyo, JP;
Nobuo Kitajima, Tokyo, JP;
Terumasa Toyoda, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
There are provided a discharge lamp drive apparatus which can detect that both ends of at least one of a plurality of discharge lamps is in an open state in a differential drive scheme, and a liquid crystal display apparatus. A first current detection circuitdetects a current flowing through a first discharge lamp connection terminal group Por a current flowing through a second discharge lamp connection terminal group P, and generates a first current detection signal S. A second current detection circuitdetects a current flowing through the second discharge lamp connection terminal group Por a current flowing through a fourth discharge lamp connection terminal group P, and generates a second current detection signal S. A signal processorreceives the first current detection signal Sand the second current detection signal S, and generates a signal Swhich is used to detect an open state of a discharge lamp based on intensities of both the current detection signals Sand S