To provide a light guide indicator and an indicator light emitting device that can reduce unevenness of luminance in a light emitting surface.SOLUTION: Locating a top part 251 of a light adjusting space 25 closer to a sub indicator part 23 than to a center axis Z1 of a light introduction axis part 21 can realize a proper balance of luminance between a main indicator part 22 and the sub indicator part 23. Providing the light adjusting space 25 with an arc part 252 can increase the range of diffusion of light that passes through the light adjusting space 25 and can reduce attenuation of light that travels along inclined parts 253 and 254. Locating the center of the arc part 252 closer to the main indicator part 22 than to the center axis Z1 makes it easier to diffuse intense light that entered the light adjusting space 25 from the top part 251. It is possible to prevent light from locally concentrating or attenuating, while keeping the luminance on the main indicator part 22 and the luminance on the sub indicator part 23 in good balance, and to reduce unevenness of luminance in the light emitting surface 24.SELECTED DRAWING: Figure 5

    【課題】発光面における輝度ムラを抑制することができる導光指針および指針発光装置を提供する。【解決手段】調光空間25の頂点部251が光導入軸部21の中心軸Z1よりも副指針部23側に位置することで、主指針部22と副指針部23との輝度のバランスを適切なものとすることができる。調光空間25が円弧部252を有することで、調光空間25を通過した光の拡散範囲を広くすることができるとともに、傾斜部253、254に沿って進行する光の減衰を抑制することができる。円弧部252の中心が中心軸Z1よりも主指針部22側に位置することで、頂点部251から調光空間25に進入した強い光を拡散しやすい。主指針部22側と副指針部23側との輝度のバランスを取りつつ、光が局所的に集中したり減衰してしまったりすることを抑制し、発光面24における輝度ムラを抑制することができる。【選択図】図5


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    Title :

    LIGHT GUIDE INDICATOR AND INDICATOR LIGHT EMITTING DEVICE


    Additional title:

    導光指針および指針発光装置


    Contributors:

    Publication date :

    2021-02-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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