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    • 13. 发明授权
    • Fiber optic display system utilizing a dual light source
    • 使用双光源的光纤显示系统
    • US5307057A
    • 1994-04-26
    • US751194
    • 1991-08-29
    • Kenneth J. CookThomas E. StackJeffry B. StoutDonald J. DavisAnwar Bawadekji
    • Kenneth J. CookThomas E. StackJeffry B. StoutDonald J. DavisAnwar Bawadekji
    • G08B5/36G08G1/095G09F9/305G08B5/00G09F19/12
    • G08B5/36G08G1/095G09F9/305
    • A fiber optic display sign is provided comprising a plurality of magnetically actuatable indicator elements, each having associated therewith at least two fiber optic cables for transmitting light. Each of the fiber optic cables has an end face for emitting light which terminates in an indicator element, and an end face for receiving light which is positioned in close proximity with the other light receiving end faces to form a light receiving surface. A light source assembly moveable with respect to the light receiving surface includes a primary light source and a secondary light source each adapted to illuminate the light receiving surface when aligned therewith. The light source assembly is alternatively moveable to a first position at which the primary light source is aligned with the light receiving surface or a second position at which the secondary light source is aligned with the light receiving surface. An electronic circuit detects an interruption in the current through the primary light source and provides an electrical signal in response thereto. A solenoid responds to the electrical signal by moving the light source assembly from the first position to the second position and energizing the secondary light source.
    • 提供了一种光纤显示符号,包括多个可磁致动的指示器元件,每个指示器元件具有至少两个用于传输光的光纤电缆。 每个光纤电缆具有用于发射终止于指示元件的光的端面和用于接收与另一个光接收端面紧密定位的光的端面,以形成光接收表面。 可相对于光接收表面移动的光源组件包括主光源和二次光源,每个光源和二次光源适于在与其对准时照射光接收表面。 光源组件可替换地移动到第一位置,在该第一位置处,初级光源与光接收表面对准,或第二位置,次光源与光接收表面对准。 电子电路检测通过初级光源的电流的中断,并响应于此而提供电信号。 螺线管通过将光源组件从第一位置移动到第二位置并激励次级光源来响应电信号。