Exposure device for forming phosphor deposited screen in in-line

Details Exposure device for forming phosphor deposited screen in in-line Exposure device for forming phosphor deposited screen in in-line

1989-04-12

1991-01-08

Gellner, Michael L.

G03B 4100

Patent

active

049839950

ABSTRACT:
An in-line color cathode ray tube utilizing a finely perforated shadow mask is provided, which includes a highly evacuated envelope having an longitudinal axis and a funnel section which is closed at one end by a generally cylindrical neck section having an in-line electron gun assembly and is closed at the opposite end by a faceplate, an exposure device for forming a mosaic pattern of element color emissive phosphor dots on a screen area of the faceplate, which includes a generally elongated light source, and a slitted member adapted to be disposed between the elongated light source and the faceplate of the evacuated envelope. The slitted member has a slit-shaped light transmissive area defined therein while leaving a light intercepting area around the respective light transmissive area. The light transmissive area has a generally intermediate portion with opposite ends being displaced in a direction parallel to the longitudinal axis of the evacuated envelope.

REFERENCES:
patent: 4222642 (1980-09-01), Van Nes et al.
patent: 4670824 (1987-06-01), Kuki et al.

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