High contrast cathode ray tube with integrated filter

Details High contrast cathode ray tube with integrated filter High contrast cathode ray tube with integrated filter

1982-12-17

1986-04-08

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Screen

313112, H01J 2918, H01J 2928

Patent

active

045815615

ABSTRACT:
The invention concerns a novel image reproducing structure for use in a cathode ray tube. This structure comprises a glass substrate which is transmissive of visible light and has a screen supporting target surface on one side thereof and a viewing surface on the opposite side. The screen comprises a phosphor deposit which is applied to at least a portion of the target surface and responds to electron beam impingement thereon to produce a visible image of a predetermined hue. The image reproducing structure further includes filter means in the form of a stain that permeates an area of the glass substrate to form an integral part thereof and exhibits a predetermined different hue. The stain permeated area is interposed between at least a part of the phosphor deposit and the substrate viewing surface.

REFERENCES:
patent: 2072115 (1937-03-01), Leverenz
patent: 2567714 (1951-09-01), Kaplan
patent: 2828217 (1958-03-01), Levin et al.
patent: 2959483 (1960-11-01), Kaplan
patent: 3468745 (1969-09-01), Navez et al.
patent: 3748515 (1973-07-01), Kaplan
patent: 3891440 (1975-06-01), Gallaro et al.

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