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:
Nov. 11, 2003
Filed:
May. 26, 2000
Other;
Abstract
A color cathode ray tube has an electron gun including a cathode structure for emitting three electron beams, a first electrode serving as a control electrode, a second electrode serving as an accelerating electrode and plural focus electrodes and an anode arranged in the order named, a phosphor screen composed of repeating patterns of three-color phosphor elements, a color selection electrode positioned the electron gun and the phosphor screen. The following inequalities are satisfied. {(L+1360×D−600)/280} +{(P−0.16)/0.06} ≦1, L+1360×D≧600, and P≧0.16, where D (mm) is a horizontal diameter of electron beam apertures in the first electrode, L (mm) is a distance from a midplane between the anode and one of the focus electrodes adjacent to, but spaced from the anode, to a center of the phosphor screen, and P (mm) is a horizontal center-to-center distance between a first phosphor element of a first color of the three-color phosphor elements in a first horizontal row of the repeating patterns and a second phosphor element of the first color which is nearest to the first phosphor element and is in a second horizontal row adjacent to the first horizontal row, at the center of the phosphor screen.