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:
May. 17, 2011
Filed:
Nov. 09, 2009
Takehiro Iizawa, Chiba, JP;
Shinichi Narushima, Chiba, JP;
Katsushi Tokura, Chiba, JP;
Yukihiko Shimizu, Chiba, JP;
Klaus Heynen, Chiba, JP;
Takehiro Iizawa, Chiba, JP;
Shinichi Narushima, Chiba, JP;
Katsushi Tokura, Chiba, JP;
Yukihiko Shimizu, Chiba, JP;
Klaus Heynen, Chiba, JP;
Futaba Corporation, Mobara-shi, Chiba, JP;
Abstract
A fluorescent display tube, which has short-length filaments, can be driven by applied voltage of 3-8V to be used for a general fluorescent display tube. The fluorescent display tube can emit sufficient thermal electrons even if the number of filament cathodes is decreased to reduce power consumption of the filaments. The filament cathode is arranged between a first and third supporting plates by one end thereof fixed to the first supporting plate and the other end thereof fixed to the third supporting plate, and the filament cathode having an equal length with the filament cathode extended between the first and third supporting plates is arranged between the second and third supporting plates.