Display apparatus for a head-up display system
First Claim
Patent Images
1. A head-up display apparatus for use in a transportation vehicle, comprising:
- an image generator for displaying an image, said image generator arranged in the transportation vehicle; and
an optical system for directing a beam of the image from said image generator to a viewer, said optical system including beam combiner means having the same optical power as a convex mirror for reflectively diffracting beams from said image generator to thereby display a reduced virtual image.
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Abstract
A display apparatus having an image generator and a beam combiner including a hologram for displaying a reduced image by receiving beams from the image generator. A virtual image of an image generated by the image generator is formed in the vicinity of the beam combiner by virtue of the image reductioning function of the beam combiner, so that the displayed image is visible from a wider range of viewing positions.
50 Citations
18 Claims
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1. A head-up display apparatus for use in a transportation vehicle, comprising:
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an image generator for displaying an image, said image generator arranged in the transportation vehicle; and an optical system for directing a beam of the image from said image generator to a viewer, said optical system including beam combiner means having the same optical power as a convex mirror for reflectively diffracting beams from said image generator to thereby display a reduced virtual image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of displaying an image through a front-glass of a means of transportation, said method comprising the steps of:
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directing a beam emitted from an image generator arranged in the transportation means toward an optical system including a beam combiner, the beam combiner having the same optical power as a convex mirror for reflectively diffracting beams from the image generator so as to display a reduced virtual image; combining images from the image generator and a normal field of view by the beam combiner; and displaying the combined images for a viewer through the beam combiner. - View Dependent Claims (18)
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Specification