HEADUP DISPLAY DEVICE
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United States of America Patent
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Issued Date -
Jan 7, 2016
app pub date -
Feb 14, 2014
filing date -
Feb 28, 2013
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Abstract
Provided is a headup display device capable of projecting a virtual image onto a curved surface. A headup display device comprises: a display means for emitting display light representing an image; a pair of parallel flat mirrors comprising a parallel arrangement of a flat semi-transparent mirror and a flat mirror, said flat semi-transparent mirror receiving the display light emitted from the display means and reflecting a part of the display light while transmitting the other part of the display light, and said flat mirror reflecting the display light toward the flat semi-transparent mirror; and a curved mirror for projecting an image represented by the display light onto a curved surface as a virtual image by reflecting the display light transmitted through the flat semi-transparent mirror onto the curved surface. The curved mirror has a curved surface shape such that when display light transmitted through the flat semi-transparent mirror and parallel to a first plane is reflected by the curved mirror and the curved surface in that order, the reflected display light becomes display light representing a virtual image parallel to a second plane.
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