Title:
ACHROMATIC DYE-BASED POLARIZATION ELEMENT, AND POLARIZATION PLATE
Document Type and Number:
WIPO Patent Application WO/2014/162634
Kind Code:
A1
Abstract:
[Problem] To provide a highly-transmissive polarization plate that can express achromatic white when a polarization element is arranged parallel to an absorbing axis, and achromatic black when the polarization element is arranged orthogonal to the absorbing axis. [Solution] A single body, which is a base material that contains a dichromatic dye formed from an azo compound, that exhibits transmissivity of equal to or greater than 35% and a polarization degree adjusted to equal to or greater than 99% and is characterized in that a* and b* values, which are acquired for a polarization element or a polarization plate using JIS·Z·8729, have an a* and b* absolute value that is: less than 1 at the time of a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
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Inventors:
MOCHIZUKI NORIAKI (JP)
Application Number:
PCT/JP2013/082626
Publication Date:
October 09, 2014
Filing Date:
December 04, 2013
Export Citation:
Assignee:
NIPPON KAYAKU KK (JP)
POLATECHNO CO LTD (JP)
POLATECHNO CO LTD (JP)
International Classes:
G02B5/30; G02F1/1335; C09B31/08; C09B45/28; C09B56/04
Domestic Patent References:
WO2007138980A1 | 2007-12-06 |
Foreign References:
JP2001311827A | 2001-11-09 | |||
JPH11281817A | 1999-10-15 | |||
JP2004251962A | 2004-09-09 | |||
JP2003215338A | 2003-07-30 | |||
JP2013057909A | 2013-03-28 | |||
JP2013057910A | 2013-03-28 | |||
JP4281261B2 | 2009-06-17 | |||
JP3357803B2 | 2002-12-16 | |||
JP2001033627A | 2001-02-09 | |||
JP2002296417A | 2002-10-09 | |||
JPS60156759A | 1985-08-16 | |||
JP2003215338A | 2003-07-30 | |||
JPH09302250A | 1997-11-25 | |||
JP3881175B2 | 2007-02-14 | |||
JP4452237B2 | 2010-04-21 | |||
JP4662853B2 | 2011-03-30 | |||
JPS645623B2 | 1989-01-31 | |||
JP2011197600A | 2011-10-06 | |||
JP4033443B2 | 2008-01-16 | |||
JP2008065222A | 2008-03-21 | |||
JPH11218611A | 1999-08-10 | |||
JP4162334B2 | 2008-10-08 | |||
JP2622748B2 | 1997-06-18 |
Other References:
See also references of EP 2990842A4
"Application of functional dye", CMC SHUPPAN CO., LTD., pages: 98 - 100
"Application of functional dye", CMC SHUPPAN CO., LTD., pages: 98 - 100
Attorney, Agent or Firm:
IWASE Yoshikazu et al. (JP)
Iwase Yoshiwa (JP)
Iwase Yoshiwa (JP)
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