公开(公告)号：US20190116344A1

公开(公告)日：2019-04-18

申请号：US15785691

申请日：2017-10-17

Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.

Inventor： GIANG-NAM NGUYEN ,  PATRICK NEBOUT ,  BENOIT CHAUVEAU

IPC: H04N9/31 ,  G02B27/01 ,  G02F1/29 ,  B60K35/00

Abstract: A multi-image head-up display device for displaying a plurality of virtual images at different projection distances from a driver of a vehicle includes a picture generating unit with an illumination source that may include a plurality of lasers of different colors to illuminate a spatial light modulator with a first light beam. The spatial light modulator includes blocks of modulating elements to diffract the first light beam to form first and second real images upon first and second respective projection surfaces, each spaced apart from the spatial light modulator by a different focal length. The blocks may be configured as Fourier and/or Fresnel diffractive optical elements. A projection assembly may magnify and direct the real images to the viewer as virtual images each having a different projection distance from the viewer. A method for generating a plurality of virtual images with a head-up display device is also provided.