A backlight unit includes a light source; a condensing unit that condenses light emitted from the light source; and a diverging unit that diverges the light entering from the condensing unit and that emits the light toward an image display unit of a light transmission type in a head-up display device. For example, the diverging unit is a lens in which both surfaces of an incident surface into which the light from the condensing unit enters as well as an emission surface from which the light is emitted toward the image display unit, are concave surfaces.


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    Title :

    Backlight unit and head-up display device


    Contributors:

    Publication date :

    2019-11-12


    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



    BACKLIGHT UNIT AND HEAD-UP DISPLAY DEVICE

    SHIHAKU JUN / KOIZUMI KENJI / MURATA NAOHISA et al. | European Patent Office | 2017

    Free access

    BACKLIGHT UNIT AND HEAD-UP DISPLAY DEVICE

    NARUSHIMA SHIGEAKI | European Patent Office | 2019

    Free access

    BACKLIGHT UNIT AND HEAD-UP DISPLAY DEVICE

    NARUSHIMA SHIGEAKI | European Patent Office | 2019

    Free access

    BACKLIGHT UNIT AND HEAD-UP DISPLAY DEVICE

    SHIHAKU JUN / KOIZUMI KENJI / MURATA NAOHISA et al. | European Patent Office | 2017

    Free access

    BACKLIGHT UNIT AND HEAD-UP DISPLAY DEVICE

    NARUSHIMA SHIGEAKI | European Patent Office | 2019

    Free access