Patent ID: 6703775
Filing Date: 2004-03-09
Classification: H01J

Abstract:
A color cathode ray tube apparatus comprising:an electron gun in which a plurality of electron lenses including a main lens for accelerating and focusing an electron beam onto a screen are formed; and a deflecting yoke for deflecting the electron beam emitted from said electron gun in order to scan said screen in horizontal and vertical directions with the deflected electron beam, said main lens of said electron gun being comprised of at least a focus electrode and a final acceleration electrode along at least a traveling direction of the electron beam, wherein said electron gun has at least one intermediate electrode arranged between said final acceleration electrode and said focus electrode that make up said main lens, a voltage divided by a voltage dividing resistor for dividing a voltage to be applied to said final acceleration electrode is applied to said intermediate electrode, a dynamic voltage which increases along with an increase in deflection amount of the electron beam is applied to said focus electrode, and a dielectric portion is provided between said electrode to which the dynamic voltage is applied and said intermediate electrode, and is formed on either one of said electrodes, and said intermediate electrode is formed into a disk-like shape and has a non-circular electron beam hole with a major axis in a direction parallel to a horizontal direction of said screen.