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:
Aug. 06, 2002
Filed:
Apr. 27, 2000
Kazuhiko Tsugita, Kamakura, JP;
Kouji Shibata, Kamakura, JP;
Tetsuya Kobayashi, Kamakura, JP;
Isamu Ogawa, Kamakura, JP;
Kenji Hamazaki, Kamakura, JP;
Hiroaki Nishikawa, Kamakura, JP;
Naoki Wada, Kamakura, JP;
Osamu Ishikawa, Kamakura, JP;
Moriaki Okuda, Kamakura, JP;
Yasunori Ieki, Kamakura, JP;
Other;
Abstract
The discharge lamp lighting apparatus includes: a direct current power supply E; switching elements Q and Q for switching a direct current supplied from the direct current power supply E so as to generate a high frequency current; a discharge lamp load circuit LAC which is constructed in a manner that a discharge lamp LA and a coupling capacitor C are connected in series, and the discharge lamp LA is lit by a high frequency current generated by the switching elements Q and Q ; a switching element control circuit IC for controlling the switching elements Q and Q . The discharge lamp lighting apparatus is further provided with a protective circuit NP which distinguishes a fault of the discharge lamp LA by detecting a voltage generated in the coupling capacitor C , and outputs a control signal to the switching element control circuit IC