An illumination light from each light emitting device illuminates a corresponding region of an image forming unit to form an image. A light condensing unit has multiple lens elements paired with the respective light emitting devices. Each condenser lens element has a light condensing surface to condense the illumination light. A z-direction is a direction connecting a surface vertex of the light condensing surface with the light emitting device paired with the surface vertex. An x-direction and a y-direction are orthogonal to each other on a virtual plane orthogonal to the z-direction. The pair of the condenser lens element and the light emitting device is aligned in at least one of the x-direction and the y-direction. Each light condensing surface is formed in a convex shape in which a curvature in the x-direction and a curvature in the y-direction are different from each other.


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    Title :

    Head-up display device


    Contributors:

    Publication date :

    2021-02-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien



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