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. 27, 1990
Filed:
Sep. 25, 1989
Takeo Fujimura, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A shadow mask type color CRT has a plurality of electron beam holes and a plurality of bridges for dividing the holes in the axial direction thereof. The electron beam projected from an electron gun passes the electron beam holes and stimulates the fluorescent screen behind the holes so as to cause the fluorescent screen to emit light. By the arrangement of the bridges in such a manner as to deviate the position of each bridge by the distance U from the intersection of an imaginary lattice, the defect such as fringes including a Moire on the screen caused by the regular arrangement of the bridges in the prior art is eliminated. The distance U is determined by a probability distribution function Q(U) which satisfies Moire regulating conditions. The shadow mask type CRT is used as a CRT commonly for two different systems using a different number of scanning lines.