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. 14, 2007
Filed:
Mar. 11, 2004
Hiroshi Kubota, Kanagawa, JP;
Toshiyuki Hiraoka, Kanagawa, JP;
Shinya Hakuta, Kanagawa, JP;
Tsutomu Araki, Kanagawa, JP;
Shinichiro Matsumoto, Kanagawa, JP;
Mari Nakamura, Kanagawa, JP;
Hiroshi Kubota, Kanagawa, JP;
Toshiyuki Hiraoka, Kanagawa, JP;
Shinya Hakuta, Kanagawa, JP;
Tsutomu Araki, Kanagawa, JP;
Shinichiro Matsumoto, Kanagawa, JP;
Mari Nakamura, Kanagawa, JP;
Toshiba Lighting & Technology Corporation, Tokyo, JP;
Abstract
An electrolytic capacitor and a ballast choke of a lighting circuit, are disposed on a first face of a circuit board facing a base, and a one-package switch of the lighting circuit is disposed on a second face, facing a fluorescent lamp. The one-package switch comprises field effect transistors contained in a single package and serve as two inverter switches for driving the fluorescent lamp. The one-package switch is a generally rectangular SMD with dimensions of not more than 6 mm respectively in length and width and mounted on the second face of the circuit board by means of terminals of the one-package switch. The one-package switch enhances heat dissipation properties of the circuit, enables the reduction of its dimensions, and increases the mounting efficiency.