Method of manufacturing fluorescent screen of color picture tube

Details Method of manufacturing fluorescent screen of color picture tube Method of manufacturing fluorescent screen of color picture tube

1976-07-30

1978-01-24

Kendall, Ralph S.

Coating processes

Electrical product produced

Welding electrode

427 54, 427 68, 96 361, B05D 306, B05D 506

Patent

active

040704980

ABSTRACT:
A method for manufacturing a fluorescent screen of a color picture tube by the steps of forming a coating of opto-hardening material on the inner surface of the faceplate of the panel of a color picture tube and exposing to a light and hardening selectively the coating thereby to form a matrix of stripes of the opto-hardening material, in which the selective exposure is performed by projecting a light derived from a light source having a predetermined width from each of at least two positions which are separated from the inner surface of the faceplate by a predetermined distance and also separated from each other onto the coating of the opto-hardening material formed on the faceplate through a slot of a predetermined width of a mask located between the inner surface of the faceplate and the light source, whereby the width of the stripe changes little even when the luminous intensity of the light source changes.

REFERENCES:
patent: 3779760 (1973-12-01), Miyaoka
patent: 3936302 (1976-02-01), Fukuda
patent: 3993487 (1976-11-01), Hosokoski

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