Improved color cathode ray tube having a faceplate-mounted suppo

Details Improved color cathode ray tube having a faceplate-mounted suppo Improved color cathode ray tube having a faceplate-mounted suppo

1986-02-21

1988-03-08

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, H01J 2907

Patent

active

047301430

ABSTRACT:
An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor target surrounded by a peripheral sealing area adapted to mate with a funnel. A separate metal faceplate frame is secured to the inner surface of the faceplate between the sealing area and the target. The separate metal frame according to the invention supports a welded-on tension foil shadow mask a predetermined distance from the inner surface of the faceplate. The separate faceplate-mounted metal frame may have according to the invention a plurality of slurry-passing structures contiguous to the inner surface of the faceplate for passing any surplusage of slurry during the radial-flow slurry-deposition process used in screening the faceplate. Various configurative embodiments of the faceplate-mounted metal frame according to the invention are also disclosed.

REFERENCES:
patent: 2625717 (1953-01-01), Wampler et al.
patent: 3284655 (1966-11-01), Oess
patent: 3638063 (1972-01-01), Techikawa et al.
patent: 3727087 (1973-04-01), Steinberg et al.
patent: 3894321 (1975-07-01), Moore
patent: 4045701 (1977-08-01), Dougherty
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patent: 4087717 (1978-05-01), Lerner
patent: 4100451 (1978-07-01), Palac
patent: 4540599 (1985-09-01), Rabatin
patent: 4547696 (1985-10-01), Strauss
"The CBS Colortron: a Color Picture Tube of Advanced Design." Fyler et al., Proc. of the Ire, Jan. 1954.
"A High14 Brightness Shadow-Mask Color CRT for Cockpit Displays", Robinder et al.

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