Color cathode-ray tube

Details Color cathode-ray tube Color cathode-ray tube

1984-06-14

1987-01-20

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, H01J 2907, H01J 2910

Patent

active

046382127

ABSTRACT:
A color cathode-ray tube in accordance with the present invention comprises a set of three electron guns in an in-line array, a shadow mask with a curved surface having a plurality of circular small apertures and a fluorescent screen with a curved surface disposed in parallel with the above stated shadow mask and including fluorescent dots arrayed in association with three electron beams passing through the above stated small apertures. The above stated shadow mask includes, in the flat state before pressed to have the curved surface, the X axis through the center of the flat mask being horizontal in parallel with the direction of the above stated in-line array and the Y axis through the center being vertical to the X axis. Rows of the apertures in the X axis direction are curved more prominently in the shape of a barrel according to increase of the distance from the X axis and columns of the apertures in the Y axis direction are all straight lines parallel to the Y axis.

REFERENCES:
patent: 2947899 (1960-08-01), Kaplan
patent: 3721853 (1973-03-01), Naruse et al.
patent: 4136300 (1979-01-01), Morrell
patent: 4162421 (1979-07-01), Morrell
patent: 4370591 (1983-01-01), Satoh

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