Polarizing plate having cellulose ester films on opposite...

Details Polarizing plate having cellulose ester films on opposite... Polarizing plate having cellulose ester films on opposite...

2007-02-27

2007-02-27

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S117000, C349S118000, C349S119000, C428S001300, C428S001310, C428S001330

Reexamination Certificate

active

11294666

ABSTRACT:
A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell is disclosed, wherein the polarizing plate comprises a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, and wherein the mixed fatty acid cellulose ester film has a retardation in plane R0of from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which R0is represented by the following formula (1) and Rt is represented by the following formula (2):in-line-formulae description="In-line Formulae" end="lead"?R0=(nx−ny)×d  formula (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rt={(nx+ny)/2−nz}×d.  formula (2)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6211358 (2001-04-01), Honda et al.
patent: 6649231 (2003-11-01), Ito
patent: 6710830 (2004-03-01), Yano et al.

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