PROBLEM TO BE SOLVED: To display a clear image by preventing the enlargement of a box body even if a virtual display position is arranged in a remote place and a virtual display screen is enlarged.SOLUTION: A non-spherical mirror or a free-form surface mirror 19 is arranged in an HUD unit 10, and the display light of a display device 12 is emitted toward an image projection region 21 of a windshield 20. A reflection face of the free-form surface mirror 19 is made to possess a distortion correction function for suppressing aberration. A half mirror 30 with an expansion function which is constituted as a Fresnel mirror is arranged in the image projection region 21 of the windshield 20, and the half mirror 30 with the expansion function is made to possess the expansion function. By the expansion function, a light passage width in the vicinity of a display light emission part 14 of the HUD unit 10 is narrowed, and a component of the HUD unit 10 and the box body 11 can be reduced in sizes. The half mirror 30 with the expansion function can also possess the distortion correction function.SELECTED DRAWING: Figure 1

    【課題】虚像表示位置を遠方に配置したり虚像表示画面を大画面化する場合であっても、筐体が大型化するのを防止し且つ鮮明な像の表示を可能にすること。【解決手段】HUDユニット10の内部に非球面ミラー又は自由曲面ミラー19を配置し、表示デバイス12の表示光をウインドシールド20の像投影領域21に向けて出射する。自由曲面ミラー19の反射面に収差を抑制するための歪み補正機能を持たせる。ウインドシールド20の像投影領域21にフレネルミラーとして構成した拡大機能付ハーフミラー30を配置して、拡大機能付ハーフミラー30に拡大機能を持たせる。この拡大機能によりHUDユニット10の表示光出射部14近傍の光路幅が小さくなり、HUDユニット10の部品および筐体11の小型化が可能になる。拡大機能付ハーフミラー30にも歪み補正機能を備えることができる。【選択図】図1


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    Title :

    DISPLAY IMAGE PROJECTION SYSTEM


    Additional title:

    表示像投影システム


    Contributors:

    Publication date :

    2018-09-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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



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