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Head up display with an angled light pipe

  • US 10,295,824 B2
  • Filed: 02/10/2017
  • Issued: 05/21/2019
  • Est. Priority Date: 01/26/2017
  • Status: Active Grant
First Claim
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1. A head up display, comprising:

  • a light pipe configured to expand a pupil in a first direction and comprising an input grating and an output grating, the light pipe comprising four elongated surfaces comprising at least two elongated surfaces that are parallel to each other, wherein the input grating and the output grating are provided in one or more planes parallel to the two elongated surfaces or on at least one of the elongated surfaces; and

    a waveguide combiner in optical communication with the light pipe and comprising a main surface disposed at an angle with respect to the two elongated surfaces, the waveguide combiner being configured to expand the pupil in a second direction along the main surface perpendicular to the first direction.

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