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:
Mar. 13, 2001
Filed:
Aug. 19, 1998
Satoru Nakagawa, Takatsuki, JP;
Yoji Yamamoto, Nishinomiya, JP;
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A cathode-ray tube with high image quality in which electron beams with higher current density than the electron-emitting ability of cathodes are formed and a driving voltage of the cathodes can be decreased. A cathode-ray tube comprises a glass face-panel, a glass funnel connected to the rear part of the face-panel, and an electron gun for emitting electron beams that is contained in a neck portion of the funnel. On the peripheral surface of the funnel, a deflection yoke for deflecting the electron beams emitted from the electron gun is mounted. A phosphor dot for three colors of red, green and blue is applied on the inner surface of the face-panel, thus forming a phosphor screen surface. In the vicinity of the inner surface of the face-panel, a shadow mask is arranged substantially in parallel with the phosphor screen surface. Between the phosphor screen surface of the face-panel and the cathodes in the electron gun, a means for superimposing a plurality of electron beams on the predetermined phosphor dot is provided.