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US 6,487,021 B1Granted
Head-mounted display
AssigneeKoninklijke Philips Electronics N.V.
InventorWillem Gerard Ophey
Life of this patent
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Abstract
The invention relates to a head-mounted display provided with an image display device and an optical system. The optical system comprises a concave mirror and a semi-transmissive element for projecting an image to be formed by the image display device via the concave mirror, the semi-transmissive element and an exit pupil of the head-mounted display on a user's retina. To improve the resolution of a displayed image of the head-mounted display, a first lens means is arranged between the image display device and the semi-transmissive element.
Claims8
A head-mounted display provided with
- an image display device and
- an optical system comprising
- a concave mirror and
- a semi-transmissive element for projecting an image to be formed by the image display device on a user's retina, that includes
- a prism having a first edge, a second edge, and a third edge,
- characterized in that
- the head-mounted display comprises a first lens which is arranged between the image display device and the semi-transmissive element for collimating radiation to be generated by the image display device in the optical system, and
- the optical system is configured such that light from the image display device:
- enters the prism via the first edge,
- is reflected at the second edge toward the third edge,
- is reflected at the third edge toward the second edge,
- exits the prism at the second edge,
- is reflected by the concave mirror toward the second edge,
- re-enters the prism through the second edge, and
- exits the prism at the third edge toward an exit pupil of the head-mounted display.
12 more elements
Dependencies are inferred from the claim text.