Title:
OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2010/071079
Kind Code:
A1
Abstract:
Provided is an optical film that has a desired wavelength dispersion characteristic, a low photoelastic coefficient, and a desired Nz coefficient. This optical film is formed from a copolymer and meets conditions (i)-(v). (i) The thickness (d) is 20-80 μm. (ii) formulas (1) and (2) are fulfilled.
(1)
(2)
(where R(450), R(550) and R(650) are the phase differences within the film surface for each wavelength.)
(iii) R(550) is 120-160 nm.
(iv) The birefringence (Δn) is 1.5 × 10-3 or greater.
(v) The Nz coefficient, expressed with formula (4), is 1.18-2.40.
(4)
(where nx, ny, and nz are respectively the three dimensional birefringences of the film.)
More Like This:
Inventors:
WASHIZU AKIKO (JP)
ANDO MASATOSHI (JP)
MOTOYOSHI TETSUYA (JP)
MAEKAWA SHOICHI (JP)
ANDO MASATOSHI (JP)
MOTOYOSHI TETSUYA (JP)
MAEKAWA SHOICHI (JP)
Application Number:
PCT/JP2009/070715
Publication Date:
June 24, 2010
Filing Date:
December 04, 2009
Export Citation:
Assignee:
TEIJIN CHEMICALS LTD (JP)
WASHIZU AKIKO (JP)
ANDO MASATOSHI (JP)
MOTOYOSHI TETSUYA (JP)
MAEKAWA SHOICHI (JP)
WASHIZU AKIKO (JP)
ANDO MASATOSHI (JP)
MOTOYOSHI TETSUYA (JP)
MAEKAWA SHOICHI (JP)
International Classes:
G02B5/30; C08G64/02; C08G64/16; C08J5/18; G02F1/13363
Domestic Patent References:
| WO2006041190A1 | 2006-04-20 |
Foreign References:
| JP2006154436A | 2006-06-15 | |||
| JPH10101786A | 1998-04-21 | |||
| JPH09268225A | 1997-10-14 | |||
| JP2007279091A | 2007-10-25 | |||
| JP2000137116A | 2000-05-16 | |||
| JP2007093654A | 2007-04-12 |
Other References:
See also references of EP 2378320A4
Attorney, Agent or Firm:
OHSHIMA Masataka (JP)
Masataka Oshima (JP)
Masataka Oshima (JP)
Download PDF: