The present invention provides a head-up display apparatus capable of both long-distance display and short-distance display. A functional film 51 is mounted on a glare trap part 50 of a head-up display apparatus 1. In order to display a first virtual image 9a, a first image display device 30a projects a first image onto a windshield 3 via the glare trap part. In order to display a second virtual image 9b having a different display distance, a second image display device 30b generates a second image on the functional film and projects the second image onto the windshield. For the functional film 51, a variable transmittance film having a light transmittance that varies according to the applied voltage or a transparent self-luminous film in which an irradiated portion emits light when irradiated with a laser beam of a specific wavelength is used.


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    Title :

    Head-up display apparatus having a functional film with a controllable transmittance


    Contributors:

    Publication date :

    2021-04-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION / 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 / 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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