To provide a signal system of visible light communication which can prevent flashing or flickering from being visible or conspicuous even without high-speed switching in communication using visible light.SOLUTION: A signal system 100 comprises: a polarization conversion unit 22 that converts the polarization state of light source light GL in accordance with a signal content to make emission light EL on a signal device side; and a signal reading unit 12s that reads the signal content on the basis of received light corresponding to the polarization state of the emission light EL. This signal system 100 enables signal transmission using polarization state switching. In this case, even if a signal switching operation for communication using, for example, visible light, is slow, flashing or flickering can be prevented from being visible.SELECTED DRAWING: Figure 2

    【課題】 可視光を利用した通信において、高速な切替えをしなくても点滅やちらつきが視認されないあるいは目立たないようにできる可視光通信の信号システムを提供すること。【解決手段】 信号システム100は、信号機側において、光源光GLの偏光状態を信号内容に応じて変換し、射出光ELとする偏光変換部22と、車上側において、射出光ELの偏光状態に応じた受光に基づき信号内容を読み取る信号読取部12sとを備える。上記信号システム100では、偏光状態の切替えを利用した信号送信が可能となり、この場合、例えば可視光を利用した通信のための信号切替えの動作が遅いものであっても、点滅やちらつきが視認されることがないようにできる。【選択図】図2


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    Title :

    SIGNAL SYSTEM AND SIGNAL LAMP


    Additional title:

    信号システム及び信号灯器


    Contributors:

    Publication date :

    2025-01-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / H04B TRANSMISSION , Übertragung



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