Color cathode ray tube

Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield

Reexamination Certificate

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Details

C313S402000

Reexamination Certificate

active

07105995

ABSTRACT:
A color cathode ray tube in which beam landing errors caused by non-uniform thermal expansion of a shadow mask are corrected is provided such that color purity is improved. The color cathode ray tube in accordance with the present invention comprises a panel having a phosphor screen formed on an inner surface thereof, a shadow mask having a faceplate portion and a peripheral skirt portion bent back from the faceplate portion and a frame joined to the skirt portion, wherein a height of the skirt portion is less than or equal to 12 mm for substantially the entire skirt portion, and a plurality of holes are perforated at the skirt portion.

REFERENCES:
patent: 3792300 (1974-02-01), Benda et al.
patent: 6051918 (2000-04-01), Hayashi et al.
patent: 6501214 (2002-12-01), Sakamoto et al.
patent: 49-112566 (1974-10-01), None
patent: 62-177831 (1987-08-01), None
patent: 63-271849 (1988-11-01), None
patent: 1-169847 (1989-07-01), None
patent: 6-267446 (1994-09-01), None

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