System for and method of displaying information without need for a combiner alignment detector
First Claim
Patent Images
1. A head up display comprising:
- a micro image source;
a collimator, wherein the collimator comprises collimator optics and wherein the collimator optics form a catadioptric optical system comprising a fold component, a first lens, a polarizing beam splitter, a collimating mirror, and a corrective lens in an on-axis arrangement and wherein the first lens is attached to the polarizing beam splitter and is disposed between the polarizing beam splitter and the micro image source;
a substrate waveguide combiner;
a stow mechanism for moving the substrate waveguide combiner out of a head path in a crash event or for moving the substrate waveguide combiner to and from an operational position and a stowed position; and
the collimator being disposed between the substrate waveguide combiner and the micro image source, the substrate waveguide combiner receiving collimated light from the collimator at an input diffraction grating disposed at an input and providing the collimated light to an output diffraction grating disposed at an output, the collimated light traveling from the input to the output within the substrate waveguide combiner by total internal refraction, wherein the input diffraction grating is disposed in a first area at the input and the output diffraction grating is disposed in a second area at the output, the output diffraction grating being parallel with respect to the input diffraction grating or perpendicular to the input diffraction grating, the output diffraction grating being matched to the input diffraction grating to achieve a periscopic effect, whereby a combiner alignment detector is not required due to the periscopic effect.
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Abstract
A display can be utilized with an image source. The display includes a collimator and a substrate waveguide. The substrate waveguide sees collimated light from the collimator at an input and provides the collimated light to an output. The collimated light travels from the input to the output within the substrate by total internal reflection. An input diffraction grating is disposed in a first area at the input and an output diffraction grating is disposed in a second area at the output. The second diffraction grating is matched to the first diffraction grating. A combiner alignment detector is not required due to the periscopic effect according to one embodiment.
611 Citations
15 Claims
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1. A head up display comprising:
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a micro image source; a collimator, wherein the collimator comprises collimator optics and wherein the collimator optics form a catadioptric optical system comprising a fold component, a first lens, a polarizing beam splitter, a collimating mirror, and a corrective lens in an on-axis arrangement and wherein the first lens is attached to the polarizing beam splitter and is disposed between the polarizing beam splitter and the micro image source; a substrate waveguide combiner; a stow mechanism for moving the substrate waveguide combiner out of a head path in a crash event or for moving the substrate waveguide combiner to and from an operational position and a stowed position; and the collimator being disposed between the substrate waveguide combiner and the micro image source, the substrate waveguide combiner receiving collimated light from the collimator at an input diffraction grating disposed at an input and providing the collimated light to an output diffraction grating disposed at an output, the collimated light traveling from the input to the output within the substrate waveguide combiner by total internal refraction, wherein the input diffraction grating is disposed in a first area at the input and the output diffraction grating is disposed in a second area at the output, the output diffraction grating being parallel with respect to the input diffraction grating or perpendicular to the input diffraction grating, the output diffraction grating being matched to the input diffraction grating to achieve a periscopic effect, whereby a combiner alignment detector is not required due to the periscopic effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A head up display comprising:
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a micro image source; a collimator, wherein the collimator comprises collimator optics and wherein the collimator optics form a catadioptric optical system comprising a fold component, a first lens, a polarizing beam splitter, a collimating mirror, and a corrective lens in an on-axis arrangement and wherein the first lens is attached to the polarizing beam splitter and is disposed between the polarizing beam splitter and the micro image source; a substrate waveguide combiner; and the collimator being disposed between the substrate waveguide combiner and the image source, the substrate waveguide combiner receiving collimated light from the collimator at an input diffraction grating disposed at an input and providing the collimated light to an output diffraction grating disposed at an output, the collimated light traveling from the input to the output within the substrate waveguide combiner by total internal refraction, wherein the input diffraction grating is disposed in a first area at the input and the output diffraction grating is disposed in a second area at the output, the output diffraction grating being parallel with respect to the input diffraction grating or perpendicular to the input diffraction grating, the output diffraction grating being matched to the input diffraction grating to achieve a periscopic effect, whereby a combiner alignment detector is not required due to the periscopic effect. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification