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. 05, 2000
Filed:
Oct. 16, 1998
Hiromi Wakasono, Takarazuka, JP;
Abstract
An effective picture area A, displaying an image on the inside of a face panel, is curved and has no inflection points. An origin O marks the center of the effective picture area A on the inside of the face panel. The x-axis passes the origin O and is parallel to the long sides X.sub.a of the effective picture area. The y-axis passes the origin O and is parallel to the short sides Y.sub.a of the effective picture area. The z-axis passes the origin O and is parallel to the tube axis. Using a Cartesian coordinate system of the axes x, y, and z, the saggital height Z of any point (x, y, z) on the inner surface of the face panel 4 from the origin O in the direction of the tube is given by Z=a.sub.1 x.sup.2 +a.sub.2 x.sup.4 +a.sub.3 y.sup.2 +a.sub.4 x.sup.2 y.sup.2 +a.sub.5 x.sup.4 y.sup.2 +a.sub.6 y.sup.4 +a.sub.7 x.sup.2 y.sup.4, which describes a curved surface without inflection points. Thus, a cathode ray tube device can be provided, wherein the distortion amount of an inner pincushion distortion in the effective picture area can be decreased without an increase of the deflection power and device costs.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile