A head-up display projects an image on a transparent reflective member to allow an observer to visually recognize a virtual image. The head-up display includes a display device and a projection optical system. The projection optical system includes a refractive optical system and a concave mirror. The display device displays the image. The projection optical system projects the image displayed on the display device to a visual point of an observer. The refractive optical system includes at least one optical element. The concave mirror has a concave reflection surface. The refractive optical system is positioned on an optical path between the display device and the concave mirror. In the refractive optical system, an incident surface of a lens element having negative power into which light of the image displayed on the display device is incident is concave.
HEAD-UP DISPLAY AND MOVING BODY EQUIPPED WITH HEAD-UP DISPLAY
2018-02-15
Patent
Elektronische Ressource
Englisch
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 / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien |
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