Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

2007-04-03

2007-04-03

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S407000

Reexamination Certificate

active

10855398

ABSTRACT:
The present invention relates to a color cathode ray tube in which beam landing errors caused by non-uniform thermal expansion of a shadow mask are corrected such that color purity is improved. In one aspect of the present invention, a color cathode ray tube comprises a panel on inner surface of which a phosphor screen is formed; a funnel joined to the panel; an electron gun; a shadow mask mounted to the panel, the shadow mask having a faceplate portion and a peripheral skirt portion bent back from the faceplate portion; and a frame joined to said shadow mask; wherein radius of curvature of at least a corner of the faceplate portion of said shadow mask is not smaller than 50 mm, and gap is provided between a corner of the faceplate portion of said shadow mask and a corresponding corner of said frame.

REFERENCES:
patent: 5233266 (1993-08-01), Spina et al.
patent: 6559585 (2003-05-01), Murai et al.
patent: 6664724 (2003-12-01), Lim
patent: 6909227 (2005-06-01), Park et al.
patent: 2001/0011864 (2001-08-01), Nose et al.

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