Head mounted displays utilizing reflection light valves
First Claim
1. A head mounted display for entering an image into the eye of a viewer along a viewing axis, the head mounted display comprising:
- a light source for supplying unpolarized light to an optical path,a first polarizer disposed in the optical path for rotating the unpolarized light to that of a first polarization,a second polarizer disposed in the optical path for blocking light of the first polarization from reaching the eye,a reflective light valve disposed in the optical path for rotating the light of the first polarization to an image of a second polarization,a concave mirror disposed in the optical path for focusing and reflecting the image of the second polarization, anda directing means for directing the light of the first polarization to the reflective light valve, for directing the image of the second polarization to the concave mirror, and for directing the focused and reflected image from the concave mirror towards the second polarizer, which transmits the focused and reflected image towards the eye of the viewer along the viewing axis.
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Accused Products
Abstract
A head mounted display for entering an image into the eye of a viewer along a viewing axis. The head mounted display has a light source for supplying unpolarized light to an optical path. Also provided is a first polarizer disposed in the optical path for rotating the unpolarized light to that of a first polarization. A second polarizer is also disposed in the optical path for blocking light of the first polarization from reaching the eye. A reflective light valve is disposed in the optical path for rotating the light of the first polarization to an image of a second polarization. Also provided is a concave mirror disposed in the optical path for focusing and reflecting the image of the second polarization. Lastly, a directing means is provided for directing the light of the first polarization to the reflective light valve, for directing the image of the second polarization to the concave mirror, and for directing the focused and reflected image from the concave mirror towards the second polarizer. The second polarizer then transmits the focused and reflected image towards the eye of the viewer along the viewing axis.
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Citations
26 Claims
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1. A head mounted display for entering an image into the eye of a viewer along a viewing axis, the head mounted display comprising:
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a light source for supplying unpolarized light to an optical path, a first polarizer disposed in the optical path for rotating the unpolarized light to that of a first polarization, a second polarizer disposed in the optical path for blocking light of the first polarization from reaching the eye, a reflective light valve disposed in the optical path for rotating the light of the first polarization to an image of a second polarization, a concave mirror disposed in the optical path for focusing and reflecting the image of the second polarization, and a directing means for directing the light of the first polarization to the reflective light valve, for directing the image of the second polarization to the concave mirror, and for directing the focused and reflected image from the concave mirror towards the second polarizer, which transmits the focused and reflected image towards the eye of the viewer along the viewing axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A head mounted display for entering an image into the eye of a viewer while allowing external objects to be viewed concurrently with the image about a viewing axis, the head mounted display comprising:
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a light source for supplying light of first and second polarizations to an optical path, a reflective light valve disposed in the optical path for reflecting an image of a second polarization, a concave mirror disposed in the optical path, a directing means for directing light of the first polarization to the reflective light valve, and for directing the image of the second polarization to the concave mirror, and a semi-transparent mirror having a degree of transparency and disposed between the directing means and the concave mirror at an intersection of the optical path and the viewing axis such that the image of the second polarization passes though the semi-transparent mirror, is focused and reflected by the concave mirror and directed back towards the semi-transparent mirror, the focused and reflected image then being reflected by the semi-transparent mirror towards the eye of the viewer along the viewing axis thereby allowing the viewing of the external objects concurrently with the image through the semi-transparent mirror. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification