Diffractive signaling device for rear-view mirror with 2D/3D display
First Claim
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, whereinthe symbol generation unit includes a first diffraction grating and a second diffraction grating corresponding respectively to a first illuminated symbol and a second illuminated symbol, andthe signaling device includes a first illumination unit and a second illumination unit that respectively produce a first light beam and a second light beam entering the symbol generation unit respectively in a first direction and second direction characterized as distinct and non-parallel to the first direction, the first and the second light beams co-operating respectively with the first and the second diffraction gratings to produce the first and the second illuminated symbols respectively.
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Accused Products
Abstract
Signaling device designed to be arranged on the reflective element forming a mirror of a rear-view device comprising at least an illumination unit and at least an optical device, characterized by the fact that the optical device includes a symbol generation unit which is provided with at least a diffraction grating designed to form an illuminated image corresponding to a first illuminated symbol, the symbol generation unit being generally transparent and the diffraction grating being formed on the surface of the symbol generation unit without affecting its transparency.
13 Citations
11 Claims
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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:
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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, wherein the 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, wherein the symbol generation unit includes a first diffraction grating and a second diffraction grating corresponding respectively to a first illuminated symbol and a second illuminated symbol, and the signaling device includes a first illumination unit and a second illumination unit that respectively produce a first light beam and a second light beam entering the symbol generation unit respectively in a first direction and second direction characterized as distinct and non-parallel to the first direction, the first and the second light beams co-operating respectively with the first and the second diffraction gratings to produce the first and the second illuminated symbols respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification