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. 30, 2008
Filed:
Mar. 27, 2006
Soon-dong Jeong, Suwon-si, KR;
Do-hun Pyun, Suwon-si, KR;
Chang-mog JO, Suwon-si, KR;
Jae-kwang Ryu, Suwon-si, KR;
Soon-Dong Jeong, Suwon-si, KR;
Do-Hun Pyun, Suwon-si, KR;
Chang-Mog Jo, Suwon-si, KR;
Jae-Kwang Ryu, Suwon-si, KR;
Samsung SDI Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A shadow mask for a cathode ray tube has an effective screen portion having a plurality of beam passage holes arranged in a predetermined pattern, and an inactive portion with no beam passage holes. The length of a beam passage hole at a column adjacent to a division between the effective screen portion and the inactive portion (hereinafter 'the beam passage hole length') in the long-sided direction is set to be smaller than the length of a beam passage hole placed at the short-sided center of the column. The beam passage hole length 'a' at columns which are even-numbered from the long-sided center of the effective screen portion is set to satisfy the condition of 1>a/A≧0.45, compared to the length A of the beam passage hole placed at the short-sided center of relevant columns. The beam passage hole length “b” at columns which are odd-numbered is set to satisfy the condition of 1>b/B≧0.35, compared to the length B of the beam passage hole placed at the short-sided center of relevant columns.