Patent ID: 6025674
Filing Date: 2000-02-15
Classification: H01J

Abstract:
A color cathode ray tube having an electron gun comprising a beam forming region for generating a plurality of electron beams from cathodes and directing said plurality of electron beams toward a phosphor screen along initial paths in a horizontal plane, a main lens for focusing said plurality of electron beams on said phosphor screen, at least one multipole lens located between said main lens and said beam forming region, and acting so as to change a cross-sectional shape of said plurality of electron beams with an increasing amount of deflection of said plurality of electron beams, and at least one correction lens for curvature of an image field located between said main lens and said beam forming region, and for weakening focusing action on said plurality of electron beams horizontally and vertically according to an increase in an amount of deflection of said plurality of electron beams, and said at least one correction lens for curvature of the image field having an electrode constitution in which trajectories of outer electron beams among said plurality of electron beams are deflected one of toward and away from a trajectory of a center electron beam among said plurality of electron beams according to an increase in an amount of deflection of said plurality of electron beams.