Phase difference plate comprising polymer film containing...

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

2006-06-13

2006-06-13

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001330, C349S118000, C252S299010

Reexamination Certificate

active

07060333

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 wave length 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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Search Report Issued in International Appl. No. PCT/JP02/02411, Jul. 9, 2002.
English language translation of the International Preliminary Examination Report mailed Dec. 17, 2003, in International Application No. PCT/JP02/02411.

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