Provided is a liquid crystal illumination device capable of providing a high-efficiency and high-intensity liquid crystal panel. The liquid crystal illumination device includes a liquid crystal panel, a light source configured to project light to the liquid crystal panel, a first diffusion unit configured to diffuse light projected from the light source, a first light guide unit configured to include a reflection surface formed in such a way as to radially widen from the light source side toward the liquid crystal panel side, reflect light diffused by the first diffusion unit at the reflection surface, and guide the light, a reflecting mirror on which an opening is formed, part of the light guided by the first light guide unit being reflected and returned to inside the first light guide unit, and remaining light passing through the opening, a light collecting unit configured to collect light passing through an opening on the reflecting mirror, and a second diffusion unit configured to diffuse light collected by the light collecting unit toward the liquid crystal panel. An opening on the reflecting mirror is formed correspondingly to a display region where the liquid crystal panel display an image. A haze value of the first diffusion unit is set to a value higher than a haze value of the second diffusion unit.


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    Title :

    LIQUID CRYSTAL ILLUMINATION DEVICE, HEAD-UP DISPLAY, AND ILLUMINATION METHOD


    Additional title:

    FLÜSSIGKRISTALLBELEUCHTUNGSVORRICHTUNG, HEAD-UP-ANZEIGE UND BELEUCHTUNGSVERFAHREN
    DISPOSITIF D'ÉCLAIRAGE À CRISTAUX LIQUIDES, AFFICHAGE TÊTE HAUTE ET PROCÉDÉ D'ÉCLAIRAGE


    Contributors:

    Publication date :

    2022-02-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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 / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21Y Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend die Form oder die Art der Lichtquellen oder die Farbe des emittierten Lichts , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED / 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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