Phase difference plate comprising polymer film containing...

Details Phase difference plate comprising polymer film containing... Phase difference plate comprising polymer film containing...

2011-05-17

2011-05-17

Jiang, Anna (Department: 1623)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

Alignment layer of specified composition

Reexamination Certificate

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07943210

ABSTRACT:
A phase difference plate which comprises one sheet of polymer film containing a compound having a rod-shaped molecular structure and exhibiting a maximum absorption wavelength (λmax) of less than 250 nm in an ultraviolet spectrum of its solution and which exhibits a retardation value as measured at a wavelength of 450 nm (Re450) of 60 to 135 nm and a retardation value as measured at a wavelength of 590 nm (Re590) of 100 to 170 nm, where the relationship: Re590−Re450≧2 nm is satisfied. The phase difference plate functions as a λ/4 plate.

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