Reflection type liquid crystal display device with high-brightness bright display and high contrast
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United States of America Patent
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Feb 3, 2004
Grant Date -
Jun 27, 2002
app pub date -
Oct 17, 2001
filing date -
Oct 24, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reflection type liquid crystal display device has phase difference plates and a polarizer provided on an outer side of a liquid crystal cell. The liquid crystal layer is twisted by 240 to 250 degrees with other characteristics including: .DELTA.nd.sub.LC for the crystal cell of 600 nm-800 nm, .DELTA.nd.sub.RF1 for the first phase difference plate of 100 nm-200 nm, and the lagging axis .gamma. of 60 to 100 degrees, .DELTA.nd.sub.RF2 for the second phase difference plate of 300 nm-500 nm and a lagging axis .alpha. of 90 to 140 degrees, and an absorption axis .alpha. of the polarizer of 20 to 70 degrees or 110 to 160 degrees.
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