Heads-up display system with optical rotation layers
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United States of America Patent
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-
Jun 1, 2004
Grant Date -
N/A
app pub date -
Dec 23, 1999
filing date -
Dec 28, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A head-up display system comprising a transparent plate. A liquid crystal display generates a display light of information with a plane of polarization inclined by about 45.degree. relative to an image plane vertical axis. A first optical rotation layer is disposed on a first surface of the transparent plate, and receives the display light from the liquid crystal display and optically rotates the plane of polarization of the display light by about 90.degree.. A second optical rotation layer is between the image plane of the liquid crystal display and a second surface of the transparent plate, and optically rotates the plane of polarization of the display light by about 45.degree. and allows S-polarized light to emanate toward the transparent plate at Brewster's angle. The S-polarized light is reflected on the second surface and is directed toward an eye of an operator.
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