It is an object of the present invention to provide a projection image-displaying member having excellent suitability for polarizing sunglasses, a windshield glass, and a head-up display system. The projection image-displaying member has a first polarization converting layer, at least one selectively reflecting layer, and a second polarization converting layer in this order. The first polarization converting layer and the second polarization converting layer are layers formed by fixing a helical alignment structure of a liquid crystal compound. The number of pitches in the helical alignment structure and a film thickness satisfy all relational expressions below.When the first polarization converting layer has a number of pitches x1 and a film thickness y1 (unit: μm),0.3≤x1≤2.0 and  (i)y1≥1.86x1+0.13.  (ii)When the second polarization converting layer has a number of pitches x2 and a film thickness y2 (unit: μm),0.25≤x2≤2.0,  (iii)y2≤1.37x2+5.5, and  (iv)y2≥1.37x2+0.25.  (v)


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    Title :

    Projection image-displaying member, windshield glass, and head-up display system


    Contributors:
    ANZAI AKIHIRO (author) / YANAI YUJIRO (author) / MAJIMA WATARU (author) / OTANI TAKETO (author)

    Publication date :

    2024-04-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / 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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    ANZAI AKIHIRO / YANAI YUJIRO / MAJIMA WATARU et al. | European Patent Office | 2020

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    PROJECTION IMAGE-DISPLAYING MEMBER, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO / YANAI YUJIRO / MAJIMA WATARU et al. | European Patent Office | 2021

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    PROJECTION IMAGE DISPLAYING MEMBER, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO / YANAI YUJIRO / MAJIMA WATARU et al. | European Patent Office | 2022

    Free access

    PROJECTION IMAGE DISPLAYING MEMBER, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO / YANAI YUJIRO / MAJIMA WATARU et al. | European Patent Office | 2020

    Free access