Patent ID: 6583547
Filing Date: 2003-06-24
Classification: H01J

Abstract:
In a cathode ray tube having an envelope comprising a panel part having a fluorescent screen, a neck part incorporating an electron gun, and a funnel part joining said panel part and said neck part, the cathode ray tube being characterized in that:said electron gun has a cathode, a control electrode, an acceleration electrode, a first anode, a focus electrode and a second anode arranged in this order in a direction toward said fluorescent screen; said first anode and said second anode to be commonly supplied with an anode voltage; said focus electrode to be supplied with a focus voltage, a length of said focus electrode in a tube axis direction being larger than a length of said first anode in the tube axis direction; said control electrode and said first anode in their portions facing said acceleration electrode and said acceleration electrode having electron beam passage holes; the electron beam passage hole of said control electrode having a diameter which is equal to or smaller than 0.57 mm; and said acceleration electrode and said first anode in the vicinity of the outer periphery of their electron beam passage holes being spaced by a distance of 1.9 mm or less.