34.3: Drawing-Induced Biaxiality Change from a Positive C to a Negative A Plate and Its Application in Wide Viewing Angle IPS LCDs

Mechanical drawing is widely used to induce the optical birefringence (positive A or negative C plates) in optically isotropic polymer films. We propose a method to make the optical films having the optical biaxiality lying in between that of the positive C and the negative A plates (nx < ny <...

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Published in:SID International Symposium Digest of technical papers 2010-05, Vol.41 (1), p.495-498
Main Authors: Yang, Young-Cheol, Yang, Deng-Ke
Format: Article
Language:English
Subjects:
biaxial plate
compensation film
in-plane switching mode
mechanical drawing
wide viewing angle
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description Mechanical drawing is widely used to induce the optical birefringence (positive A or negative C plates) in optically isotropic polymer films. We propose a method to make the optical films having the optical biaxiality lying in between that of the positive C and the negative A plates (nx < ny < nz) utilizing the solvent evaporation and the mechanical drawing processes. A theoretical model is proposed to calculate the birefringence induced by the processes. Numerical calculation shows that the biaxial film drawn properly can widen the viewing angle of IPS mode LCDs.
doi_str_mv 10.1889/1.3500504
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subjects biaxial plate
compensation film
in-plane switching mode
mechanical drawing
wide viewing angle
title 34.3: Drawing-Induced Biaxiality Change from a Positive C to a Negative A Plate and Its Application in Wide Viewing Angle IPS LCDs
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