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1. (WO2017186806) HEADS-UP DISPLAY DEVICE WITH A HOLOGRAPHICALLY OPTICAL ELEMENT FOR A MOTOR VEHICLE

Pub. No.:    WO/2017/186806    International Application No.:    PCT/EP2017/059961
Publication Date: Fri Nov 03 00:59:59 CET 2017 International Filing Date: Thu Apr 27 01:59:59 CEST 2017
IPC: G02B 27/01
Applicants: AUDI AG
Inventors: WALL, Christian
Title: HEADS-UP DISPLAY DEVICE WITH A HOLOGRAPHICALLY OPTICAL ELEMENT FOR A MOTOR VEHICLE
Abstract:
The invention relates to a heads-up display device (10) for a motor vehicle (20), having a housing (14), a projection device (16) arranged in the housing (14) for projecting a virtual image onto a projection surface (12) lying outside of the housing (14), and a deflecting device (18) arranged in the housing (14) for deflecting a light (34) emitted from the projection device (16). The deflecting device (18) comprises a holographically optical element (22) which is rotatably mounted in the housing (14) and which is designed to deflect the light (34) of the projection device (16) within the housing (14) towards the projection surface (12). The holographically optical element (22) can have reflective properties with respect to the light (34) based on a rotational position and in this manner can act on the light (34) as a virtual reflective surface (36', 36'', 36'''), wherein a virtual linear movement (44) along a direction of propagation of the light (34) can be adjusted by means of the rotational position of the holographically optical element (22).