Electrodeless fluorescent lamp with reduced spurious electromagnetic
radiation
    1.
    发明授权
    Electrodeless fluorescent lamp with reduced spurious electromagnetic radiation 失效
    无电极荧光灯具有降低的杂散电磁辐射

    公开(公告)号:US4187447A

    公开(公告)日:1980-02-05

    申请号:US941126

    申请日:1978-09-11

    IPC分类号: H01J65/04 H01J1/52

    CPC分类号: H01J65/048

    摘要: Spurious electromagnetic radiation from an electrodeless fluorescent lamp having a phosphor-coated, globular glass envelope containing an ionizable gas surrounding at least a portion of a toroidal magnetic core is reduced by situating a conductive loop about the envelope such that the loop and core planes are normal to each other. The loop also acts as the harp for a lampshade. Radio frequency energy, coupled into the gas from the core to ionize and excite the gas to emit ultraviolet radiation and thus stimulate visible radiation from the phosphor, also radiates from the lamp. The loop, driven by the radiated radio frequency energy, creates an opposing electromagnetic field. Cancellation of the radiated radio frequency energy thus tends to occur at a distance from the lamp, sharply reducing electromagnetic interference from the lamp.

    摘要翻译: 具有含有荧光粉涂覆的球形玻璃外壳的无电极荧光灯的杂散电磁辐射通过将包围环形磁芯的至少一部分的可电离气体置于围绕信封的位置使得环路和核心平面正常 对彼此。 该圈还充当灯罩的竖琴。 射频能量耦合到来自核心的气体中以电离和激发气体以发射紫外线并因此刺激来自荧光体的可见光辐射也从灯辐射。 由辐射的射频能量驱动的环路产生相反的电磁场。 因此,放射射频能量的消除倾向于在距离灯一定距离处发生,从而大大减少了来自灯的电磁干扰。