Patent ID: 6011348
Filing Date: 2000-01-04
Classification: H01J

Abstract:
A color cathode ray tube comprising:an electron gun composed of a plurality of electrodes including a cathode, a first grid electrode, and a second grid electrode arranged in this order forming a pre-focus lens for generating and focusing three in-line electron beams, and a pair of electrodes disposed downstream of said pre-focus lens and forming a final main lens, each of said pair of electrodes having a common single opening for said three electron beams in an end thereof opposing another of said pair of electrodes, and each of said pair of electrodes having therein another electrode set back from said end thereof opposing another of said pair of electrodes, said another electrode being provided with openings for each of said three in-line electron beams, a member of each of said pair of electrodes formed with said common single opening and said another electrode being separate parts and assembled in unity;a deflection device for deflecting said thee in-line electron beams in horizontal and vertical directions;a phosphor screen made luminescent by impingement thereon of said three in-line electron beams;wherein a focusing action of said pre-focus lens and a focusing action of said main lens are different between a center electron beam and a side electron beam of said three in-line electron beams, respectively.