Color-compensated information displays

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6624936
APP PUB NO 20010055153A1
SERIAL NO

09853051

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
3M INNOVATIVE PROPERTIES COMPANYST PAUL, MN8719

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ebihara, Ikuko St. Paul, MN 10 276
Gilligan, Gregory E Hastings, MN 14 267
Kotchick, Keith M St. Paul, MN 39 1238

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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3M INNOVATIVE PROPERTIES COMPANY (4)
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* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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LG DISPLAY CO., LTD. (2)
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* Cited By Examiner