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:
Jul. 11, 2006
Filed:
Aug. 07, 2003
Kouichi Saitou, Chonan, JP;
Kazumasa Hirai, Mobara, JP;
Tetsuo Asano, Mobara, JP;
Kotaro Aoki, Mobara, JP;
Yasuo Tanaka, Ichihara, JP;
Kouichi Saitou, Chonan, JP;
Kazumasa Hirai, Mobara, JP;
Tetsuo Asano, Mobara, JP;
Kotaro Aoki, Mobara, JP;
Yasuo Tanaka, Ichihara, JP;
Hitachi, Ltd., Chiba-ken, JP;
Hitachi Electronic Devices, Ltd. Co., Chiba-ken, JP;
Abstract
The present invention aims at maintaining the high focusing performance at a low deflection power in a single-beam projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a high current. The neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than the neck outer diameter of a portion which accommodates an electron gun. The maximum anode voltage of the projection tube is set to equal to or more than 25 kV and the maximum beam current is set to equal to or more than 4 mA