Patent ID: 6563258
Filing Date: 2003-05-13
Classification: H01J

Abstract:
A color cathode ray tube comprising a vacuum envelope including a panel portion, a neck portion and a funnel portion for connecting said panel portion and said neck portion, a phosphor screen formed on an inner surface of said panel portion, and an electron gun housed in said neck portion;said electron gun comprising an electron beam generating section having a cathode, an electron beam control electrode and an accelerating electrode arranged in the order named for emitting three in-line electron beams toward said phosphor screen, and an electron beam focusing section for focusing said three in-line electron beams from said electron beam generating section onto said phosphor screen, said electron beam generating section and said electron beam focusing section being mounted in predetermined spaced relationship on a plurality of insulator support rods, said electron beam focusing section including at least one cup-shaped electrode having a tubular portion and a flange formed continuously from said tubular portion, said tubular portion having a generally rectangular cross section having an outwardly curved portion at each side thereof in a direction of arrangement of said three in-line electron beams in a plane perpendicular to an axis of said color cathode ray tube, said flange having a generally rectangular cross section having an outwardly curved portion at each side thereof in the direction of arrangement of said three in-line electron beams in the plane perpendicular to the axis of said color cathode ray tube, and said flange being formed with a locally thinned-down portion.