Method of exposing to light fluorescent screens of color picture

Details Method of exposing to light fluorescent screens of color picture Method of exposing to light fluorescent screens of color picture

1982-03-24

1983-11-08

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

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

430 23, 430396, 354 1, G03C 504

Patent

active

044143184

ABSTRACT:
In a method of exposing to light a fluorescent screen of an in-line dot type color picture tube wherein an inner surface of a panel of the tube coated with a photosensitive film, a shadow mask, and a linear type extra-high pressure mercury lamp covered by a shielding plate having an opening are disposed substantially in parallel so as to expose the inner surface of the panel to light passing through apertures of the shadow mask, a plurality of openings are formed in the shield plate with a mutual spacing of n.times.B.sub.p (L/Q) where B.sub.p represents a lateral pitch between adjacent apertures of the shadow mask, L a distance between the mercury lamp and the inner surface of the panel, Q a distance between the shadow mask and the inner surface of the panel, and n a positive integer, and the inner surface of the panel is exposed to light from the plurality of openings through the apertures of the shadow mask.

REFERENCES:
patent: 4271247 (1981-06-01), Morrell

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