Method of forming phosphor screen of color cathode-ray tube and

Details Method of forming phosphor screen of color cathode-ray tube and Method of forming phosphor screen of color cathode-ray tube and

1994-09-28

1996-10-29

Gellner, Michael L.

Photography

Exposing multicolor cathode-ray tube targets

Having light source or optical element which moves during...

G03B 4100

Patent

active

055701450

ABSTRACT:
An exposure apparatus for exposing a resist film coated on the inner surface of a face panel in a color cathode-ray tube through a shadow mask with a number of apertures apparatus comprises an exposure light source having an optical axis coaxial with an axis of the face panel, for radiating a light beam onto the inner surface of the face panel through the shadow mask. A discontinuous lens is arranged between the exposure light source and the shadow mask to be rotatable about the optical axis. The discontinuous lens has first and second regions arranged adjacent to one another in the direction of rotation of the discontinuous lens. A light beam from the exposure light source is guided by means of the first and second regions to the shadow mask along different paths. The lens is rotated by a drive motor so that the light beam from the light source passes through each of the apertures along two different paths.

REFERENCES:
patent: 4052123 (1977-10-01), Yamazaki et al.
patent: 5132187 (1992-07-01), Morohashi

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