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. 26, 1995
Filed:
Mar. 04, 1994
Satoshi Muto, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The color cathode ray tube of this invention improves the purity (color purity) adjustment margin and permits bright display without deteriorating the resolution. At least the black matrix holes 40g, 40b, 40r, forming the phosphor surface or the shadow mask apertures are so arranged that the center-to-center distance between the adjacent holes or apertures corresponding to the pixel phosphors of the same color in a vertical direction is greater by about 10 to 70% than the center-to-center distance in an inclined direction. Further, at least the black matrix holes or the shadow mask apertures are shaped non-circular with their vertical cross-section greater than their horizontal cross-section. With this invention it is possible to provide a color cathode ray tube which has improved brightness and purity (color purity) adjustment margin and a substantially enhanced resolution.