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. 22, 2003
Filed:
Jun. 14, 2001
Hiroki Nakagawa, Osaka, JP;
Tetsuya Tahara, Shiga, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A light bulb type fluorescent lamp lighting apparatus includes a fluorescent light emitting tube; and an electronic lighting circuit for applying an electric current to the fluorescent light emitting tube. The electronic lighting circuit includes a pair of electrode filaments provided in the fluorescent light emitting tube, a capacitor connected parallel to the fluorescent light emitting tube, an inductor connected in series to one of the pair of electrode filaments, and at least one temperature negative characteristic resistance element connected parallel to at least one of the pair of electrode filaments. The at least one temperature negative characteristic resistance element has a resistance impedance, and the fluorescent light emitting tube is started based on a change in the resistance impedance of the at least one temperature negative characteristic resistance element.