Patent ID: 6495952
Filing Date: 2002-12-17
Classification: H01J

Abstract:
A cathode ray tube comprising:an evacuated envelope comprising a panel portion having a phosphor screen formed on an inner surface thereof, a neck portion and a funnel portion connecting said panel portion and said neck portion; an electron gun housed in said neck portion comprising at least one cathode, a first grid electrode, a second grid electrode, a plurality of focus electrodes and an anode arranged in the order named for focusing at least one electron beam emitted from said at least one cathode on said phosphor screen, said at least one cathode, said first grid electrode, said second grid electrode, said plurality of focus electrodes and said anode being fixed in predetermined axially spaced relationship by at least two glass beads; a voltage-dividing resistor attached to one of said at least two glass beads for producing an intermediate voltage to be applied to a first one of said plurality of focus electrodes adjacent to said anode by dividing a voltage applied to said anode; a metal conductor facing and attached to a second one of said plurality of focus electrodes to surround said voltage dividing resistor and said one of said at least two glass beads, said second one of said plurality of focus electrodes being disposed upstream of said first one of said plurality of focus electrodes; and a metal film disposed on a side of an insulating substrate of said voltage-dividing resistor facing an inner wall of said neck portion between said metal conductor and an intermediate-voltage terminal of said voltage-dividing resistor for applying said intermediate voltage to said first one of said plurality of focus electrodes, said metal film extending at least 1 mm in a direction of a longitudinal axis of said cathode ray tube and being spaced at least 1 mm from said metal conductor.