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    Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased
    1.
    发明公开
    Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased 失效
    Kathodenstrahlröhreeinheitin die das vom BildschirmunerwünschtenStrahlungselektrischesfeld desKathoderstrahlröhrevermindert ist

    公开(公告)号：EP0708474A1

    公开(公告)日：1996-04-24

    申请号：EP95116440.9

    申请日：1995-10-18

    申请人： HITACHI, LTD.

    发明人： Jitsukata, Hiroshi ,  Kawakami, Katsuyuki ,  Sakurai, Soichi ,  Yoshioka, Hiroshi ,  Satoh, Yoshio

    IPC分类号： H01J29/00

    CPC分类号： H01J29/003 ,  H01J2229/0015

    摘要： A cathode-ray tube display unit provided with a high voltage transformer (20) for supplying high voltage to an anode of a cathode-ray tube (1), a deflection yoke (6) having a horizontal deflection coil and a vertical deflection coil, and an interior conductive coating (13) formed on the inside of a glass vessel of the cathode-ray tube (1), in which there is provided an electrode (8) in the conductive coating form formed on an external wall face of a glass vessel at a funnel portion (2) being electrically separated from an exterior graphite coating (5) formed on an external surface of the cathode-ray tube (1) and connected to ground, and a circuit for applying reverse pulse voltage V₁ that satisfies (V 0 × C 0 ) > (V 1 × C 1 ) to the electrode in the conductive coating form is included. Where, it is assumed that flyback pulse voltage supplied to the deflection yoke means (6) is V₀, reverse pulse voltage having a polarity reverse to that of voltage generated in the interior conductive coating (13) is V₁, electrostatic capacity between the horizontal deflection coil and the interior conductive coating (13) is C₀, and electrostatic capacity between the electrode (8) in the conductive coating form and the interior conductive coating (13) is C₁.

    摘要翻译： 一种阴极射线管显示单元，其具有用于向阴极射线管（1）的阳极提供高电压的高压变压器（20），具有水平偏转线圈和垂直偏转线圈的偏转线圈（6） 以及形成在阴极射线管（1）的玻璃容器的内部的内部导电涂层（13），其中设置有形成在玻璃的外壁面上的导电涂层形式的电极（8） 在漏斗部分（2）上的容器与形成在阴极射线管（1）的外表面上并与地连接的外部石墨涂层（5）电分离，以及用于施加反向脉冲电压V1的电路，其满足（ V0 x C0）>（V1 x C1）与导电涂层形式的电极。 其中，假定提供给偏转线圈装置（6）的回扫脉冲电压为V0，具有与在内部导电涂层（13）中产生的电压相反的极性的反向脉冲电压为V1，水平偏转之间的静电电容 线圈和内部导电涂层（13）为C0，导电涂层形式的电极（8）和内部导电涂层（13）之间的静电电容为C1。