Light exposing apparatus for forming a phosphor screen of a cath

Details Light exposing apparatus for forming a phosphor screen of a cath Light exposing apparatus for forming a phosphor screen of a cath

1975-03-10

1977-11-22

O'Connor, Edna M.

96 361, G03B 4100

Patent

active

040598349

ABSTRACT:
A light exposing apparatus for use in forming a phosphor screen of a color cathode ray tube is disclosed in which a control means is connected to a movable platform for relatively moving a light sensitive film mounted on an inner surface of a face panel relative to an exposing light source facing said light sensitive film with a shadow mask interleaved therebetween. An electrical signal is supplied to said control means each time the accumulated value of ultraviolet ray emitted from said light source reaches a predetermined value, and said movable platform is moved lengthwise of slots in said shadow mask depending on the magnitude of said electrical signal during the light exposing process.

REFERENCES:
patent: 3559546 (1971-02-01), McKee
patent: 3636836 (1972-01-01), Maddox et al.
patent: 3736848 (1973-06-01), Lsuneta et al.
patent: 3780629 (1973-12-01), Barten et al.
patent: 3848983 (1974-11-01), Fridrich
patent: 3856525 (1974-12-01), Inoue
patent: 3890151 (1975-06-01), Seizuki et al.
patent: 3906515 (1975-09-01), Hosokoshi et al.
patent: 3925700 (1975-12-01), Saito
patent: 3949411 (1976-04-01), Yonai

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