Liquid crystal projector
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United States of America Patent
Stats
-
Sep 13, 1988
Grant Date -
N/A
app pub date -
Mar 12, 1987
filing date -
Mar 24, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a liquid crystal projector wherein a light source is arranged behind a transmission liquid crystal display panel having a rectangular display portion, an image displayed on the liquid crystal display panel is enlarged by a projection lens, and an enlarged image is projected on the screen located in front of the liquid crystal display panel, a linear Fresnel lens is arranged between the light source and the liquid crystal display panel to narrow illumination light beam from the light source along only the widthwise direction of the rectangular display portion. When the illumination light beam from the light source is narrowed along only the widthwise direction of panel, the amount of unused light beam emitted outside the long sides of the display portion can be reduced, and the light beam from the light source can be effectively utilized for image projection.
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Cited Art Landscape
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