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:
Apr. 29, 2003
Filed:
Jul. 19, 2000
Masahiro Nishizawa, Mobara, JP;
Hiroshi Yoshioka, Mobara, JP;
Yoshiyuki Odaka, Isumi, JP;
Toshio Tojo, Ichinomiya, JP;
Other;
Abstract
A color cathode ray tube of the present invention includes an evacuated envelop that is structured from a panel having a phosphor screen on its inner surface, a neck portion containing therein an electron gun assembly, and a cone-shaped section called the funnel for integrally coupling the panel and the neck together, wherein when the main scanning direction of a display screen formed of the panel is defined as an X direction whereas a direction at right angles to the main scan direction is as a Y-direction, an equivalent radius of curvature R of an outer surface of the panel in the X direction is at least 2.6 times greater than an equivalent curvature radius R of the inner surface while forming on the inner panel surface an inside light absorption layer that is comprised of pigments as its principal component.