CRT with asymmetric electrode geometry in inline direction with respect to side beam apertures in first grid electrode

摘要

In a color cathode ray tube having an inline electron gun, an electrode geometry asymmetric in the inline direction is provided on the two side beam apertures in the first grid electrode for the two side beams on the side facing the cathode such that as the electron beam current through the side beam apertures decreases, the degree of an asymmetry in the inline direction in a distribution of an electric field between the side beam apertures and the cathodes increases.