TN liquid crystal display panel with the difference between the produce of the first retardation film, which is not adjacent to the LC cell, and has larger value than the second retardation film, and the second retardation is in the range of 0<.increment.R
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United States of America Patent
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Aug 18, 1998
Grant Date -
N/A
app pub date -
Oct 12, 1995
filing date -
Oct 19, 1994
priority date (Note) -
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Abstract
A TN type liquid crystal cell is interposed between a pair of polarization plates. First and second retardation films each having slow axes orthogonal to each other are disposed between one of the polarization plates and the liquid crystal cell. The product .DELTA.n.sub.1 .times.d.sub.1 of the refractive index anisotropy .DELTA.n.sub.1 and the thickness d.sub.1 of the first retardation film on the side of one of the polarization plates is set to a value greater than the product .DELTA.n.sub.2 .times.d.sub.2 of the refractive index anisotropy .DELTA.n.sub.2 and the thickness d.sub.2 of the second retardation film. The viewing angle of the liquid crystal display panel in the left-right direction is expanded by this arrangement.
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