Patent ID: 6456018
Filing Date: 2002-09-24
Classification: H01J

Abstract:
An electron gun for a color cathode ray tube comprising:cathodes, a control electrode, and a screen electrode, together forming a triode; first and second focusing electrodes sequentially located relative to the screen electrode, a third focusing electrode having horizontally elongated electron beam holes on an exit side, and a fourth focusing electrode having vertically and horizontally elongated electron beam holes on entrance and exit sides, respectively; and a fifth focusing electrode, located adjacent to the fourth focusing electrode and having vertically elongated electron beam holes, and a final accelerating electrode located adjacent to the fifth focusing electrode, the fifth focusing electrode and the final accelerating electrode forming a main lens, wherein a static voltage is applied to the screen electrode and the second focusing electrode, a focus voltage is applied to the first, third, and fifth focusing electrodes, and a parabola dynamic focus voltage, synchronized with a deflection signal, is applied to the fourth focus electrode and a sixth focusing electrode.