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:
Oct. 11, 2005
Filed:
Jun. 05, 2003
Applicant:
Hideaki Etou, Hirakata, JP;
Inventor:
Hideaki Etou, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J029/07 ; H01J029/81 ;
U.S. Cl.
CPC ...
Abstract
Each of a plurality of arrays of apertures of a shadow mask has a vertically long aperture, a vertically short aperture and a bridge between these apertures. In each of the arrays of apertures, one long aperture and one or more short apertures are arranged alternately, and a horizontal maximum width Hof the short aperture is larger than a horizontal basic width Hof the long aperture. This makes it possible to provide a color cathode ray tube having an improved brightness without causing moiré fringes, color displacement, breaking of the shadow mask or variation in color purity.