Protection type display device with polarized light reflecting mirror and polarized light source
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United States of America Patent
Stats
-
Oct 27, 1998
Grant Date -
N/A
app pub date -
Jul 10, 1997
filing date -
Dec 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A display device includes a reflective type polarizer, a light valve, an analyzer, a mirror, and a polarization rotating film. The polarizer allows a first polarized light to pass therethrough and a second polarized light to be reflected thereby. The second polarized light is then reflected to the polarizer by the mirror, and the vibrating plane of the second polarized light is rotated by the polarization rotating film, so that the second polarized light can pass through the polarizer. The polarizer is inclined to an optical axis of the device. The mirror is arranged near the light source. This principle is also applied to a projection type color display device. In addition, a polarized light source including a lamp, a reflector, a polarizer, a mirror, and a polarization rotating film is disclosed.
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