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. 02, 2008
Filed:
Mar. 17, 2006
Do-hun Pyun, Suwon-si, KR;
Soon-dong Jeong, Suwon-si, KR;
Soon-cheol Shin, Suwon-si, KR;
Hoo-deuk Kim, Suwon-si, KR;
Mun-seong Kim, Suwon-si, KR;
Do-Hun Pyun, Suwon-si, KR;
Soon-Dong Jeong, Suwon-si, KR;
Soon-Cheol Shin, Suwon-si, KR;
Hoo-Deuk Kim, Suwon-si, KR;
Mun-Seong Kim, Suwon-si, KR;
Samsung SDI Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A shadow mask for a Cathode Ray Tube (CRT) which achieves a high brightness and white uniformity by minimizing light emission of incorrect colors, includes: an effective screen portion with a plurality of beam passage holes arranged in a predetermined pattern and a non-holed portion surrounding the effective screen portion with no beam passage holes. The beam passage holes have a large-sized hole portion on a side facing a panel of the CRT and a small-sized hole portion that is smaller than the large-sized hole portion on a side facing an electron gun are selected such. A concave portion is formed on each of the beam passage holes arranged in a direction from a center of the effective screen portion to a direction of emission, and the concave portion is varied from the center of the effective screen portion diagonally such that a serif width D satisfies D=a−bx+cx2 (wherein a, b, and c are constants, and x is a spatial distance from the center of the effective screen portion to the center of the beam passage hole) and a, b, and c are selected such that {c/(b+c)} has an absolute value between 0.0092 and 0.0099.