Patent ID: 6411026
Filing Date: 2002-06-25
Classification: G10K,H01J

Abstract:
A color cathode ray tube equipped with an in-line electron gun comprising three cathodes for emitting three electron beams of an in-line arrangement toward a fluorescent screen, and a main lens for focusing said three electron beams on the fluorescent screen, said main lens comprising a first main lens electrode and a second main lens electrode arranged in a spaced relationship in a direction of an axis of said tube and having different voltages applied thereto, each of said first and second main lens electrodes having a single opening common to said three electron beams at opposing ends thereof, and at least one of said first main lens electrode and said second main lens electrode having therein three apertures for electron beam passage which are set back from said opposing ends, wherein T and S have values in a region where the following inequalities are satisfied,2S+14.6&lE;T&lE;28.1, and4.1&lE;S, S being a beam spacing in mm between central axes of said three electron beams at said main lens, and T being an outside diameter in mm of a neck portion of a vacuum envelope housing said in-line electron gun.