Fluorescent screens of color picture tubes and manufacturing met

Details Fluorescent screens of color picture tubes and manufacturing met Fluorescent screens of color picture tubes and manufacturing met

1987-12-28

1989-08-08

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

With light-absorbing matrix on faceplate

430 23, 430 24, 430 28, 430144, G03C 500, H01J 9227

Patent

active

048552003

ABSTRACT:
A high contrast and brightness fluorescent screen of a color picture tube has a light absorbing layer in the form of fine dots or stripes provided for the inner surface of a panel of the tube on which the phosphor layer is formed, and a light reflection layer provided at an interface between the light absorbing layer and the phosphor layer. To manufacture the fluorescent screen, a photosensitive resin layer coated on an inner surface of the panel is exposed to light through a photomask mounted on outside of the panel to form a pattern. Nonluminous light absorbing substance is applied on the pattern to form the light absorbing layers.

REFERENCES:
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patent: 3738233 (1973-06-01), Schwartz
patent: 3879632 (1975-04-01), Dietch
patent: 4100321 (1978-07-01), Schlesinger et al.
patent: 4205255 (1980-05-01), Tomita et al.
patent: 4223083 (1980-09-01), Engstrom
patent: 4234669 (1980-11-01), Pearlman
patent: 4273842 (1981-06-01), Nonogaki et al.
patent: 4331752 (1982-05-01), Yokomizo et al.
patent: 4391885 (1983-07-01), Tomita et al.

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