Method and apparatus for forming phosphor screen of color pictur

Details Method and apparatus for forming phosphor screen of color pictur Method and apparatus for forming phosphor screen of color pictur

1977-10-28

1980-01-15

Gonzales, John

G03B 4100

Patent

active

041836375

ABSTRACT:
A method of forming a stripe type phosphor screen on inner surface of a face plate of a color picture tube or CRT through the irradiation with light stripes. A single linear light source is employed in combination with a plurality of juxtaposed prisms between the face plate and the linear light source with the taper angles of the prisms being continuously varied so that a plurality of virtual linear light sources may be observed from any points on the inner surface of the face plate with the distances between mid-points of the virtual linear light sources taking optimum values at respective positions on the inner surface of the face plate. With such arrangement, an improved phosphor screen composed of phosphor stripes of three colors having uniform stripe width can be formed over the whole inner surface of the face plate by using a single linear light source without requiring driving apparatus for moving the light source to different positions.

REFERENCES:
patent: 3828358 (1974-08-01), Miyaoka
patent: 4070498 (1978-01-01), Nishizawa et al.

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