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Projection device and head-up display device

  • US 10,302,939 B2
  • Filed: 08/07/2015
  • Issued: 05/28/2019
  • Est. Priority Date: 08/20/2014
  • Status: Active Grant
First Claim
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1. A projection device, comprising:

  • a display configured to emit projection light representing a display image; and

    an image formation position adjusting mirror comprising;

    a first surface;

    a second surface opposite the first surface;

    a first reflection surface provided on the first surface, the first reflection surface having a first curvature, the first reflection surface receiving, from the display as a first projection light, a first part of the projection light and reflecting the first projection light toward a first screen, the first projection light traveling a first image formation distance extending between the first reflection surface and the first screen; and

    a second reflection surface provided on the first surface, the second reflection surface having a second curvature different from the first curvature, the second reflection surface receiving, from the display as a second projection light, a second part of the projection light and reflecting the second projection light toward a second screen different from the first screen, the second projection light traveling a second image formation distance extending between the second reflection surface and the second screen,wherein the second image formation distance is different from the first image formation distance.

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