When a viewing angle of the image is ± F degrees, an angle between the diffraction structure of the expansion region and a traveling direction of the light flux is α degrees, an inclination angle of the diffraction structure is β degrees, an angle between the center light beam of the light flux incident on the expansion region and the Z axis is θA degrees, an angle between a center light beam of a light flux diffracted and emitted in the expansion region and the Z axis is θB degrees, a thickness of the diffraction structure in a Z direction is T [µm], a shorter interval between the diffraction structure and each of a front surface and a back surface of the light guide body is Ts [µm], and a coherence length of the light flux diffracted and emitted in the expansion region in the light guide body is L [µm], the following relational expression is satisfied. |θA - θB| < | F |/2, | β | × 2 × cos (α) ≤ | F | θA - θB|, and Ts > L/2


    Access

    Download


    Export, share and cite



    Title :

    OPTICAL SYSTEM AND HEAD-UP DISPLAY SYSTEM PROVIDED WITH SAME


    Additional title:

    OPTISCHES SYSTEM UND HEAD-UP-ANZEIGESYSTEM DAMIT
    SYSTÈME OPTIQUE ET SYSTÈME D'AFFICHAGE TÊTE HAUTE POURVU DE CELUI-CI


    Contributors:

    Publication date :

    2025-01-29


    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



    OPTICAL SYSTEM AND HEAD-UP DISPLAY SYSTEM PROVIDED WITH SAME

    MINAMI KAZUHIRO / KUZUHARA SATOSHI / SHOBAYASHI HIROYUKI | European Patent Office | 2023

    Free access

    HEAD-UP DISPLAY SYSTEM, AND MOBILE OBJECT PROVIDED WITH HEAD-UP DISPLAY SYSTEM

    YONETANI YUSUKE | European Patent Office | 2020

    Free access

    HEAD-UP DISPLAY SYSTEM, AND MOBILE OBJECT PROVIDED WITH HEAD-UP DISPLAY SYSTEM

    YONETANI YUSUKE | European Patent Office | 2018

    Free access

    DISPLAY CONTROL DEVICE AND HEAD-UP DISPLAY DEVICE PROVIDED WITH SAME

    HONMA KAKO / LIN WU | European Patent Office | 2024

    Free access

    Head-up display system provided with transparent nano film

    TSO FAI / HE LISHAN / HUANG FENGZHU et al. | European Patent Office | 2024

    Free access