Cathode ray display tube with contrast enhancement panel

Details Cathode ray display tube with contrast enhancement panel Cathode ray display tube with contrast enhancement panel

1977-06-30

1980-01-22

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Envelope

358252, H01J 2989

Patent

active

041852206

ABSTRACT:
A cathode ray display tube is provided with a contrast enhancement panel which is optically coupled to the tube faceplate. The contrast enhancement panel has a viewing surface which is spherical and concave with respect to a viewer.

REFERENCES:
patent: 2172775 (1939-09-01), Schmidt-Ott et al.
patent: 2312206 (1943-02-01), Calbick
patent: 2531956 (1950-11-01), Waldorf et al.
patent: 2958801 (1960-11-01), Herriott
patent: 3048729 (1962-08-01), Perry
patent: 3504212 (1970-03-01), Wollentin et al.
patent: 3697154 (1972-10-01), Johnson
patent: 3760215 (1973-09-01), Sach

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