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:
Feb. 01, 2000
Filed:
Mar. 25, 1998
Applicant:
Inventor:
Tsukasa Yasuda, Shiga, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313403 ;
Abstract
A shadow mask type color cathode ray tube prevents rotation of light emitted through slots in a shadow mask that would form a zigzagged stripe during an exposure of a fluorescent film. The slots are rotated at an angle .theta..sub.1 about a center of the slots in a direction opposite to the direction of rotation, whereby light passing through the slots is offset, so that a vertical striped fluorescent surface can be thus obtained.