Thermally-sensitive, photo-controlled semiconductor switching systems
    22.
    发明授权
    Thermally-sensitive, photo-controlled semiconductor switching systems 失效
    热敏感光电半导体开关系统

    公开(公告)号:US4119845A

    公开(公告)日:1978-10-10

    申请号:US779639

    申请日:1977-03-21

    CPC分类号: H03K17/79 H03K17/0824

    摘要: A switching system having a photo-sensitive power switching or control element such as a photo SCR, photo triac, photo transistor or the like that is normally turned on or off by coupled light from a controlled light source such as an LED (light emitting diode), neon lamp, incandescent lamp or the like. A thermally-sensitive light-gating element such as an LC (liquid crystal) element controls the light impinging on the photo-sensitive element. The gating element may sense the temperature of the photo-sensitive power switching or control element directly if the two are integral in which case the combined device would be self-protecting. On the other hand, the gating element may be separate and may be arranged to sense the temperature of an external source that may or may not be controlled by the photo-sensitive power switching or control element in which case the latter would be controlled by the temperature. Different types of temperature-sensitive gating elements or combinations thereof may be used in the systems.

    摘要翻译: 具有通常通过来自受控光源(例如LED(发光二极管))的耦合光而导通或截止的光敏电力切换或控制元件的光敏电源开关或控制元件如光SCR,光电三端双向可控硅,光电晶体管等的开关系统 ),霓虹灯,白炽灯等。 诸如LC(液晶)元件的热敏门控元件控制照射在感光元件上的光。 门控元件可以直接感测光敏电力开关或控制元件的温度,如果两者是一体的,在这种情况下,组合器件将是自我保护的。 另一方面,门控元件可以是分开的并且可以被布置成感测外部源的温度,该外部源的温度可以由光敏电力开关或控制元件控制或者不受控制,在这种情况下,后者将由 温度。 可以在系统中使用不同类型的温度敏感门控元件或其组合。