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:
Aug. 03, 1999
Filed:
Jan. 02, 1997
Kenichi Watanabe, Isumi-gun, JP;
Shoji Shirai, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A main lens portion in a three beam in-line type color cathode ray tube includes spaced-apart tube-like electrodes having elongated openings at facing ends thereof, and plate electrodes disposed therein. At least one of electron beam apertures in the two plate electrodes is a barrel-like aperture. The barrel-like aperture is defined by two arcs extending in the direction perpendicular to the inline direction and two straight lines extending in the inline direction. The apertures for the side electron beams in the plate electrode can be replaced with cutouts therein. Each of the cutouts is defined by two straight lines extending in the inline direction and an arc convexly curved toward the tube axis and extending in the direction perpendicular to the inline direction.