Title:
BIREFRINGENT OPTICAL FILM, ELLIPTIC POLARIZING PLATE USING THE FILM AND LIQUID CRYSTAL DISPLAY DEVICE USING THESE
Document Type and Number:
Japanese Patent JP2004212971
Kind Code:
A
Abstract:
To provide a birefringent optical film having both high orientation property which easily gives a desired phase difference value, and a small photoelastic coefficient.
The film includes two or more kinds of polymer materials and the total sum of the products of photoelastic coefficient Cn of the materials and their volume fraction Wn satisfies an equation 1 below. The film includes at least respective one kind of polymer material having a photoelastic coefficient value of ≥60x10-8cm2/N and polymer material having a negative photoelastic coefficient value. The equation 1 is Σ(Cn×Wn)≤20×10-8cm2/N.
Inventors:
NISHIKOJI YUICHI
MURAKAMI NAHO
FUJITA TOKIO
YOSHIMI HIROYUKI
MURAKAMI NAHO
FUJITA TOKIO
YOSHIMI HIROYUKI
Application Number:
JP2003415087A
Publication Date:
July 29, 2004
Filing Date:
December 12, 2003
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
G02B5/30; B32B7/02; B32B27/00; G02F1/13363; (IPC1-7): G02B5/30; B32B7/02; B32B27/00; G02F1/13363
Attorney, Agent or Firm:
Ikeuchi, Sato & Partners