To provide a HUD device capable of achieving satisfactory virtual images from any position in a visible area, and a diffuser for the HUD.SOLUTION: A HUD device includes: a light source unit that emits illumination light; a plurality of image elements that forms an image by partially transmitting illumination light; and a diffuser 40 for diffusing the illumination light formed in a plate-like shape extending along an extension reference plane SP, which is arranged on an optical path between the light source unit and the image element. The diffuser 40 has isotropic diffusion zones IDZ for diffusing the illumination light at an isotropic diffusion angle, and anisotropic diffusion zones ADZ for diffusing the illumination light at an anisotropic diffusion angle. The isotropic diffusion zones IDZ and the anisotropic diffusion zones IDZ are arranged alternately along the extension reference plane SP.SELECTED DRAWING: Figure 3

    【課題】視認領域の任意の位置から虚像の良好な視認性を得ることができるHUD装置及びHUD用拡散板を提供する。【解決手段】HUD装置は、照明光を発する光源部と、照明光の部分的な透過により、画像を形成する画像素子と、光源部と画像素子との間の光路上に配置され、延設基準面SPに沿って拡がる板状に形成され、照明光を拡散する拡散板40と、を備える。拡散板40は、等方的な拡散角にて照明光を拡散する等方性拡散ゾーンIDZと、異方的な拡散角にて照明光を拡散する異方性拡散ゾーンADZと、を有する。等方性拡散ゾーンIDZと異方性拡散ゾーンADZとは、延設基準面SPに沿って交互に配置されている。【選択図】図3


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    Title :

    HEAD-UP DISPLAY DEVICE AND DIFFUSER FOR HEAD-UP DISPLAY


    Additional title:

    ヘッドアップディスプレイ装置及びヘッドアップディスプレイ用拡散板


    Contributors:
    MIYAKE YUSUKE (author) / YOKOE JUNYA (author) / NAMBARA TAKAHIRO (author) / SAEKI RYU (author)

    Publication date :

    2022-02-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    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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