Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1994-03-04

1995-12-26

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Screen

313462, 313472, H01J 2910

Patent

active

054790689

ABSTRACT:
The color cathode ray tube of this invention improves the purity (color purity) adjustment margin and permits bright display without deteriorating the resolution. At least the black matrix holes 40g, 40b, 40r, forming the phosphor surface or the shadow mask apertures are so arranged that the center-to-center distance between the adjacent holes or apertures corresponding to the pixel phosphors of the same color in a vertical direction is greater by about 10 to 70% than the center-to-center distance in an inclined direction. Further, at least the black matrix holes or the shadow mask apertures are shaped non-circular with their vertical cross-section greater than their horizontal cross-section. With this invention it is possible to provide a color cathode ray tube which has improved brightness and purity (color purity) adjustment margin and a substantially enhanced resolution.

REFERENCES:
patent: 3247412 (1966-04-01), Barneveld et al.
patent: 4893054 (1990-01-01), Kobayashi
patent: 4908547 (1990-03-01), Toyama et al.
patent: 4973879 (1990-11-01), Fujimura

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