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:
Sep. 13, 2005
Filed:
Apr. 25, 2003
Applicants:
Takashi Itoh, Amagasaki, JP;
Masahide Yamauchi, Kyoto, JP;
Koji Fujii, Kashihara, JP;
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J001/46 ;
U.S. Cl.
CPC ...
Abstract
The CRT device comprises a cold cathode electron gun that includes cathodes, a peripheral focusing electrode, and an accelerating electrode. The cathode has a structure in which an emitter electrode and a gate electrode are joined together with an insulating layer interposed therebetween. The electric potential difference from the emitter electrode is 60V for the gate electrode, 0V for the peripheral focusing electrode, and 4.6 kV for the accelerating electrode.