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DIFFRACTIVE SIGNALING DEVICE FOR REAR-VIEW MIRROR WITH 2D/3D DISPLAY

  • US 20120262288A1
  • Filed: 12/21/2010
  • Published: 10/18/2012
  • Est. Priority Date: 01/06/2010
  • Status: Active Grant
First Claim
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1. A signaling device arranged on a reflective element forming a mirror of a rear-view device of a motor vehicle, the rear-view device allowing a main user to observe, by reflection, a zone rearward of the rear-view device, said signaling device comprising:

  • an illumination unit;

    an optical device configured to direct a light beam produced by the illumination unit toward the zone in order to display at least a first illuminated signaling symbol in the zone, said first illuminated signal configured to be seen exclusively by observers other than the main user; and

    a symbol generation unit equipped with a diffraction grating configured to form an illuminated image corresponding to the first illuminated symbol when the illumination unit is lit, said symbol generation unit being generally transparent, and said diffraction grating being formed on the surface of the symbol generation unit without affecting its transparency, whereinthe illumination unit is arranged relative to the symbol generation unit so that the light beam enters the symbol generation unit through an outer peripheral edge of the symbol generation unit and is then diffracted towards the zone by the diffraction grating to form the first illuminated symbol.

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