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:
Dec. 25, 2007
Filed:
Mar. 25, 2004
Hiroyuki Arai, Gunma, JP;
Syuji Motegi, Tochigi, JP;
Takeshi Kimura, Tochigi, JP;
Tetsuya Tokunaga, Gunma, JP;
Hiroyuki Arai, Gunma, JP;
Syuji Motegi, Tochigi, JP;
Takeshi Kimura, Tochigi, JP;
Tetsuya Tokunaga, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A driving circuit for a vacuum fluorescent display having a filament, a grid electrode and a segment electrode, comprising a grid driving unit for pulse-driving the grid electrode, a segment driving unit for pulse-driving the segment electrode, a first controlling unit for rendering adjustable the duty ratio of the output of the grid driving unit, a second controlling unit for rendering adjustable the duty ratio of the output of the segment driving unit, and a selecting unit for selecting the first controlling unit and/or the second controlling unit.