Display apparatus having quarter-wave plate positioned to eliminate conflicts with polarized sunglasses
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United States of America Patent
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Oct 26, 1999
Grant Date -
N/A
app pub date -
Aug 6, 1997
filing date -
Aug 6, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A display apparatus adapted for viewing by a person wearing linearly polarized lenses, such as sunglasses, is disclosed. The display apparatus includes a display device, such as an LCD or a filtered TFEL display, which displays information by providing as an output linearly polarized light travelling toward the person viewing the display apparatus. A quarter-wave plate is positioned between the display device and the linearly polarized lenses of the sunglasses. The quarter-wave plate receives the linearly polarized light from the display device as an input and provides as an output circularly polarized light which passes through the linearly polarized lenses of the sunglasses substantially without attenuation.
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