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:
Dec. 25, 2001
Filed:
Dec. 24, 1998
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
Provided is a color cathode ray tube, which comprises a panel including a substantially rectangular effective portion, of which the outer surface is a flat surface or a slightly curved surface, and a shadow mask having an effective surface opposite the inner surface of the effective portion of the panel. In this color cathode ray tube, the inner surface of the effective portion of the panel is a curved surface having a substantially infinite curvature radius RXp,in the major-axis direction on the major axis thereof near the center, a predetermined curvature radius RXp,in the major-axis direction near peripheral portions on the major axis, and another predetermined curvature radius in the minor-axis direction on the minor axis thereof. This color cathode ray tube, with its panel having the substantially flat outer surface, enjoys improved visibility and higher strength for the maintenance of the curved surface of the shadow mask.