Image display unit
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United States of America Patent
Stats
-
Jun 2, 1998
Grant Date -
N/A
app pub date -
Oct 13, 1994
filing date -
Dec 14, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A heads-up display unit provided with a display device serving as display image forming means which displays a display image. A hologram serves as a reflecting means, and reflects the display light emitted from the display device, causing reflection of the display image on the interior surface of a vehicle's windshield. A display image is formed outside the windshield towards the front of the vehicle. A concave mirror having a different focal length in different directions is recorded in the hologram serving as a reflecting means so as to offset distortion of the display image caused by curvatures of the windshield. This construction makes it possible to cause the windshield to display a display image free from distortion.
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Cited Art Landscape
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