Patents Assigned to Hitachi Electonic Devices Co., Ltd.
  • Patent number: 6433469
    Abstract: A cathode ray tube includes an evacuated envelope having a panel portion having a phosphor screen, a neck portion and a funnel portion connecting the panel portion and the neck portion; an electron gun housed in the neck portion having a cathode, a first grid electrode, a second grid electrode, plural focus electrodes and an anode arranged in the order named and fixed in predetermined axially spaced relationship by two glass beads; a voltage-dividing resistor attached to one of the two glass beads for producing an intermediate voltage to be applied to a first one of the plural focus electrodes adjacent to the anode by dividing a voltage applied to the anode; and a metal conductor facing and attached to a second one of the plural focus electrodes to surround the voltage-dividing resistor and the one of the two glass beads, the second one of the plural focus electrodes being disposed upstream of the first one of the plural focus electrodes.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: August 13, 2002
    Assignees: Hitachi, Ltd., Hitachi Electonic Devices Co., Ltd.
    Inventors: Atsushi Tsuruoka, Sakae Ishii, Satoru Miyamoto, Hisao Nakamura