Color-compensated information displays
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 23, 2003
Grant Date -
Dec 27, 2001
app pub date -
May 10, 2001
filing date -
May 11, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polarizer has low color shift and is particularly well suited to use in an LCD display. The polarizer has a double pass color shift of .vertline..DELTA.x.vertline..ltoreq.0.005 and .vertline..DELTA.y.vertline..ltoreq.0.005 for illumination by a C-illuminant, and a double pass contrast modulation of at least 90%. The display includes two or more layers stacked together, at least one of the layers being an absorbing polarizer having a double pass color shift of .vertline..DELTA.x.vertline..ltoreq.0.005 and .vertline..DELTA.y.vertline..ltoreq.0.005 for illumination by a C-illuminant. A polarizer with a selected color shift is also used with a rear projection screen having a dispersing layer stacked together with first absorbing polarizer. The polarizer has a single pass color shift with at least one of .DELTA.x and .DELTA.y being negative under illumination by a C-illuminant, and a polarization co-efficiency greater than 90%.
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Cited Art Landscape
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