Method for the illumination of a color television mask tube scre

Details Method for the illumination of a color television mask tube scre Method for the illumination of a color television mask tube scre

1989-03-07

1991-06-11

Van Le, Hoa

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

Using specific control or specific modification of exposure,...

430 25, 430 26, 430396, 430394, 354 1, H01M 804

Patent

active

050231570

ABSTRACT:
The disclosure concerns the manufacture of mask type color television tubes. A diaphragm is used, for which the profile or aperture is modified during the operation for the uniform illumination of the vertical stripes of the screen during the different stages for the deposition of luminophors. The modification of the profile is obtained by the shifting of strips parallel to the vertical stripes.

REFERENCES:
patent: 4418279 (1983-11-01), Hager et al.
patent: 4590137 (1986-05-01), D'Amato
patent: 4707093 (1987-11-01), Testa

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