Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1980-06-20
1982-09-21
Segal, Robert
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
H01J 2907
Patent
active
043509223
ABSTRACT:
CRT comprises a color-selection structure for producing a plurality of quadrupolar lenses, each lens defining a window for passing and focusing portions of electron beams to an associated color group of a target. The color-selection structure comprises (i) a metal masking plate having therein an array of substantially rectangular windows, each window having associated therewith (ii) a pair of first conductors insulatingly spaced from one major surface of the plate and located adjacent opposite sides of the aperture and (iii) a pair of second conductors insulatingly spaced from the other major surface of the plate and located adjacent opposte sides of the window. The CRT includes means for applying a voltage to said plate, means for applying a voltage to said pairs of first conductors and means for applying a voltage to said pairs of second conductors.
REFERENCES:
patent: 4059781 (1977-11-01), Alphen et al.
patent: 4066923 (1978-01-01), Esdonk
patent: 4112563 (1978-09-01), Esdonk
patent: 4121131 (1978-10-01), Esdonk et al.
patent: 4188562 (1980-02-01), Oostrum
Bloom Stanley
Catanese Carmen A.
Greenspan L.
Irlbeck D. H.
RCA Corporation
Segal Robert
Whitacre E. M.
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