A head-up display device includes: an illumination light source unit configured to emit illumination light; an image forming unit configured to form the image by partial transmission of the illumination light and to emit the image as the display light; and an anisotropic diffusion unit disposed on an optical path between the illumination light source unit and the image forming unit to diffuse the illumination light at an anisotropic diffusion angle. When the image is displayed as a virtual image, the image is defined to have an image up-down axis in a direction along an up-down direction of the vehicle and an image left-right axis perpendicular to the image up-down axis. The diffusion angle in the anisotropic diffusion unit is larger in a direction corresponding to the image left-right axis than in a direction corresponding to the image up-down axis.


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    Title :

    Head-up display device and image projection unit


    Contributors:

    Publication date :

    2022-07-12


    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 / G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING,... , Vorrichtungen oder Anordnungen, deren optische Arbeitsweise durch Änderung der optischen Eigenschaften des Mediums der Vorrichtungen oder Anordnungen geändert wird zum Steuern der Intensität, Farbe, Phase, Polarisation oder der Richtung von...



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