Multicolor cathode-ray tube with quadrupolar focusing...

H - Electricity – 01 – J

Patent

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313/35.16

H01J 29/07 (2006.01) H01J 29/81 (2006.01)

Patent

CA 1170704

RCA 74,340 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 screen. The color-selection structure comprises (i) a metal masking plate having therein an array of substantially rectangular apertures, each aperture having associated therewith (ii) a first pair of conductors insulatingly spaced from one major surface of the plate and located adjacent opposite sides of the aperture and (iii) a second pair of conductors insulat- ingly spaced from the other major surface of the plate and located adjacent opposite sides of the aperture. The CRT includes means for applying a voltage to the plate, means fox applying a voltage to the first pairs of conductors and means for applying a voltage to the second pairs of conductors.

379612

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