Shielded cathode ray tube and method for shielding the RF-emission from a CRT
    1.
    发明公开
    Shielded cathode ray tube and method for shielding the RF-emission from a CRT 失效
    Kathodenstrahlröhremit Abschirmung。

    公开(公告)号:EP0510568A1

    公开(公告)日:1992-10-28

    申请号:EP92106766.6

    申请日:1992-04-21

    IPC分类号: H01J29/86

    CPC分类号: H01J29/867

    摘要: A shielded CRT (18) display includes a secondary shielding enclosure (14) for enclosing the CRT (18) and for inhibiting electromagnetic emissions therefrom. A primary shielded enclosure (12) internal to the secondary shielding ennlosure (14) has a portion coaxial (16) with the neck portion (22) of the CRT (18) for also inhibiting electromagnetic emissions from the CRT (18). The CRT (18) includes an internal conductive layer comprised of an internal aquadag, wire mask, and phosphor coating. This internal conductive layer is grounded via a reactive path to ground to suppress electromagnetic emissions. This double shielding suppression technique eliminates the need for external shielding of the face portion of the CRT (18).

    摘要翻译: 屏蔽CRT(18)显示器包括用于封闭CRT(18)并用于抑制电磁辐射的次级屏蔽外壳(14)。 第二屏蔽罩(14)内部的主屏蔽外壳(12)具有与CRT(18)的颈部(22)同轴的部分(16),用于还抑制来自CRT(18)的电磁辐射。 CRT(18)包括内部导电层,内部导电层由内部水珠,线掩模和磷光体涂层组成。 该内部导电层通过无源路径接地以抑制电磁辐射。 这种双重屏蔽抑制技术消除了对CRT(18)的面部部分的外部屏蔽的需要。