Provided are a reflection film, which enables high visible light transmittance, an increase in the brightness of a display image, and favorable transparency of an external tint, a windshield glass, and a head-up display system. The reflection film includes a selective reflection layer formed of a cholesteric liquid crystal layer with a cholesteric liquid crystalline phase immobilized. In each of a wavelength range of 400 nm or more and less than 500 nm and a wavelength range of 500 nm or more and less than 600 nm, a maximum value of a natural light reflectivity is 10% to 25%, the greatest difference between the greatest maximum value and the smallest minimum value of the natural light reflectivity is 3% or more, and a total value of wavelength bandwidths in a region where a reflectivity is higher than an average value of the maximum value and the minimum value of the natural light reflectivity is 20 nm to 80 nm. In a wavelength range of 600 nm or more and 800 nm or less, a maximum value of a natural light reflectivity is 10% to 25%, and a total value of wavelength bandwidths in a region where a reflectivity is higher than an average value of the maximum value and the minimum value of the natural light reflectivity is 120 nm or more.


    Access

    Download


    Export, share and cite



    Title :

    REFLECTION FILM, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM


    Contributors:

    Publication date :

    2023-10-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge



    Reflection film, windshield glass, and head-up display system

    ANZAI AKIHIRO | European Patent Office | 2024

    Free access

    REFLECTION FILM, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO / ARITA SHUSUKE | European Patent Office | 2024

    Free access

    Reflection film, windshield glass, and head-up display system

    ANZAI AKIHIRO / ARITA SHUSUKE | European Patent Office | 2024

    Free access

    REFLECTION FILM, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO | European Patent Office | 2023

    Free access

    REFLECTION FILM, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM

    ANZAI AKIHIRO / ARITA SHUSUKE | European Patent Office | 2022

    Free access