To provide an HUD device which features high visibility of virtual images.SOLUTION: An HUD device comprises an illumination light source for generating illumination light, an image forming unit configured to form an image from partially transmitted illumination light and output the image as display light, and an anisotropic diffusion unit 20 disposed in a light path between the illumination light source and the image forming unit and configured to diffuse the illumination light at anisotropic diffusion angles. The anisotropic diffusion unit 20 has a diffusion angle in a direction LDd, corresponding to a horizontal axis of the image, greater than a diffusion angle in a direction SDd corresponding to a vertical axis of the image.SELECTED DRAWING: Figure 6

    【課題】虚像の視認性が高いHUD装置を提供する。【解決手段】HUD装置は、照明光を発する照明光源部と、照明光の部分的な透過により画像を形成して、表示光として射出する画像形成部と、照明光源部と画像形成部との間の光路上に配置され、異方的な拡散角で照明光を拡散する異方性拡散部20と、を備える。異方性拡散部20において、画像左右軸に対応する方向LDdの拡散角は、画像上下軸に対応する方向SDdの拡散角よりも大きい。【選択図】図6


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    Title :

    HEAD-UP DISPLAY DEVICE AND IMAGE PROJECTION UNIT


    Additional title:

    ヘッドアップディスプレイ装置及び画像投射ユニット


    Contributors:

    Publication date :

    2019-03-28


    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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