Shadow mask for cathode ray tube having an aperture area in...

Details Shadow mask for cathode ray tube having an aperture area in... Shadow mask for cathode ray tube having an aperture area in...

2006-09-12

2006-09-12

Guharay, Karabi (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S407000, C313S47700R

Reexamination Certificate

active

07105993

ABSTRACT:
A shadow mask for a cathode ray tube includes an aperture area having a plurality of apertures passing electron beams, a non-aperture area extending a predetermined distance from a circumference of the aperture area and a skirt extending a predetermined distance from an outside circumference of the non-aperture area and bent at a predetermined angle to the non-aperture area, wherein the aperture area has predetermined curvature radii, and wherein if a curvature radius in a horizontal direction of the aperture area is Rhs, and a curvature radius in a vertical direction is Rvs, the following condition is satisfied,in-line-formulae description="In-line Formulae" end="lead"?0.6<Rvs/Rhs<0.8.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 4677339 (1987-06-01), Inoue et al.
patent: 5506470 (1996-04-01), Inoue et al.
patent: 6407489 (2002-06-01), Lee
patent: 6642642 (2003-11-01), Watanabe et al.
patent: 6650034 (2003-11-01), Watanabe et al.
patent: 6650035 (2003-11-01), Matsudate
patent: 6713951 (2004-03-01), Okamoto et al.
patent: 2003/0122474 (2003-07-01), Lee

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