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:
Nov. 30, 1999
Filed:
Mar. 31, 1999
Hitachi, Ltd., Tokyo, JP;
Abstract
A cathode ray tube includes a panel portion having a phosphor screen, a neck portion having a stem fused and sealed to one end thereof, the stem having a plurality of stem pins annularly arrayed, sealed thereto and extending therethrough for supporting an electron gun in the neck portion and a funnel portion for connecting the other end of the neck and panel portions. A stem mound is raised and formed integrally with the stem around a base of each of the stem pins on an electron-gun-supporting side thereof. A first R1 is defined as a distance from a center axis of portion to an inner wall in a region of the neck portion facing a major portion of the electron gun, a second distance R2 is defined as a distance from the center axis tide edge of the stem mound, measured at half an axis of the stem mound, the first distance R1 and the second distance R2 satisfy a relationship, 0<R1-R2<2.1 mm. A wall thickness of a region of the neck portion in the vicinity of the fused and sealed regions of the neck portion and the stem is smaller than a wall thickness of a region of the neck portion facing the major portion of the electron gun.