The invention relates to a vehicle-mounted head-up display. The vehicle-mounted head-up display comprises a base, a diffraction waveguide which is arranged on the base, rotates at a high speed during working, and is provided with an entrance pupil grating and an exit pupil grating, and a projection light machine which is arranged between the base and the diffraction waveguide and corresponds to the entrance pupil area, wherein the light emitting axis of the projection light machine, the central axis of the entrance pupil grating and the rotation axis of the diffraction waveguide are coaxial; and light emitted by the projection light machine enters the entrance pupil grating, is diffracted and coupled into the diffraction waveguide by the entrance pupil grating, is transmitted to the exit pupil grating through total reflection in the waveguide, and is diffracted and output by the exit pupil grating. According to the vehicle-mounted head-up display, large-view-field display is achieved through the small-area diffraction waveguide.
本申请涉及一种车载抬头显示器,包括:底座;衍射波导,设置于底座上,工作时高速旋转;衍射波导设置有入瞳光栅和出瞳光栅;投影光机,设置于底座和衍射波导之间,对应入瞳区设置,投影光机的出光轴线、入瞳光栅的中轴线与衍射波导的旋转轴线同轴;投影光机发出的光线进入入瞳光栅,由入瞳光栅衍射耦合进衍射波导,经波导内全反射传播至出瞳光栅,并由出瞳光栅衍射输出。本申请车载抬头显示器通过小面积的衍射波导实现大视场显示。
Vehicle-mounted head-up display
车载抬头显示器
2021-12-03
Patent
Electronic Resource
Chinese
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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