Electron guns for use in cathode ray tubes
AssigneeHitachi, Ltd.
InventorsEiichi Yamazaki, Hiromi Kanai, Toshio Hurukawa
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Abstract
In an electron gun for use in a cathode ray tube of the class wherein a main electron lens system is constituted by a plurality of discrete electron lens systems, the plurality of electron lens systems are of the unipotential type and the intensity of the preceding lens system is made larger than that of the succeeding lens system.
Claims7
In a cathode ray tube image system an electron gun in a cathode ray tube comprising a single gun monobeam electron source and a main electron lens combination aligned on the axis of said gun which includes first and second axially aligned independent electron lens systems having a common electrode therebetween, each independent electron lens system including three electrodes including said common electrode arranged in sequence on substantially the same axis with said common electrode being the last electrode of said first lens system and the first electrode of the succeeding said second lens system, an intermediate electrode of said three electrodes in each said system having an applied voltage lower than that applied to the other electrodes of said electron lens system, and means including voltage supply means for said electrodes for making the beam focusing power of said first of said electron lens systems closest to said source greater than that of succeeding lens systems more remote from said source.
Dependencies are inferred from the claim text.