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:
Oct. 17, 2000
Filed:
Jun. 17, 1998
Hitachi, Ltd., Tokyo, JP;
Hitachi Device Engineering Co., Ltd., Chiba-ken, JP;
Abstract
A color cathode ray tube includes an evacuated envelope having a panel portion with a phosphor screen formed on an inner surface thereof, a neck portion, and a funnel portion connecting the panel portion and the neck portion, and an electron gun housed in the neck portion. The electron gun has a cathode and a plurality of focus grid electrodes including grid electrodes for forming a multistage focus lens for focusing an electron beam emitted from the cathode. The cathode and the focus grid electrodes are fixed in predetermined axially spaced relationship by a pair of bead glass. The electron gun is provided with a voltage divider for producing at least one voltage other than a voltage supplied from outside the evacuated envelope, the voltage divider is made of at least one resistor and is fabricated as a separate element from the bead glass, and at least one of bead glass is provided with a recess for receiving the voltage divider in a surface thereof on a side thereof facing away from the cathode and the focus grid electrodes.