Color display tube, method of manufacturing such a display tube

Details Color display tube, method of manufacturing such a display tube Color display tube, method of manufacturing such a display tube

1977-07-08

1979-06-26

Gonzales, John

Photocopying

Miscellaneous

29 2517, 96 361, 313403, 354 1, 355132, G03B 2700

Patent

active

041591771

ABSTRACT:
The bridges between apertures located at the edge of the shadow mask of a color display tube are made at least 20% wider than the others. The width of the bridges increases linearly from row to row from the center to the edge of the mask whereby a continuously varying brightness distribution is obtained. The reproduction mask used in the fabrication of such a shadow mask can be made photographically by exposing photosensitive material through a pattern of bridges, rotating the pattern and repeating the exposure.

REFERENCES:
patent: 3652895 (1972-03-01), Tsuneta et al.
patent: 3844005 (1974-10-01), Yamada et al.

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