Patent ID: 6031326
Filing Date: 2000-02-29
Classification: H01J

Abstract:
An electron gun for a cathode ray tube comprising:a plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a first anode, a focus electrode and a second anode, which electrodes are arranged in a tube axial direction at predetermined intervals; andelectrode supports provided to a side wall of each electrode and embedded in and secured to insulating supports;wherein the focus electrode is cylindrical and has three different diameters respectively provided at a cathode side portion, an intermediate portion and a panel side portion, the panel side portion of the focus electrode is inserted into the second anode to constitute a main lens section, the inner diameter of the intermediate portion of the focus electrode is smaller than the inner diameter of the panel side portion and larger than the inner diameter of the cathode side portion and the electrode support is provided at the intermediate portion of the focus electrode.