Patent ID: 6815913
Filing Date: 2004-11-09
Classification: H01J

Abstract:
A cathode ray tube comprising an evacuated envelope which is constituted of a panel portion on which a phosphor screen is formed, a neck portion which houses an electron gun and a funnel portion which connects the panel portion and the neck portion, whereinthe electron gun has a cathode, a control electrode, an acceleration electrode, a front-stage anode electrode divided into a plurality of electrodes, and an anode electrode, the plurality of divided front-stage anode electrodes are arranged at given intervals in a tube axis direction of the cathode ray tube, a plurality of divided focus electrodes arranged at given intervals in the tube axis direction of the cathode ray tube, wherein an anode voltage, which is the highest voltage applied to the electron gun, is applied to the front-stage anode electrode and the anode electrode, and a focus voltage is applied to the focus electrode, and wherein the front-stage anode electrode is divided into halves and the focus electrode is divided into quarters.