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Title:
ACHROMATIC DYE-BASED HIGHLY-TRANSMISSIVE POLARIZATION ELEMENT, AND POLARIZATION PLATE
Document Type and Number:
WIPO Patent Application WO/2014/162635
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 polarization element, which is obtained from a base material containing a dichromatic dye formed from an azo compound, is characterized in that the single-body transmittance is 35-60%, and 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 in 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.

Inventors:
MOCHIZUKI NORIAKI (JP)
Application Number:
PCT/JP2013/082627
Publication Date:
October 09, 2014
Filing Date:
December 04, 2013
Export Citation:
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Assignee:
NIPPON KAYAKU KK (JP)
POLATECHNO CO LTD (JP)
International Classes:
G02B5/30; G02F1/1335; C09B31/08; C09B45/28; C09B56/04
Domestic Patent References:
WO2009156784A12009-12-30
WO2012165223A12012-12-06
WO2012165223A12012-12-06
WO2007138980A12007-12-06
Foreign References:
JP2001311827A2001-11-09
JPH11281817A1999-10-15
JP2013057909A2013-03-28
JP2013057910A2013-03-28
JP4281261B22009-06-17
JP3357803B22002-12-16
JP2001033627A2001-02-09
JP2002296417A2002-10-09
JPS60156759A1985-08-16
JP2003215338A2003-07-30
JPH09302250A1997-11-25
JP3881175B22007-02-14
JP4452237B22010-04-21
JP4662853B22011-03-30
JP2011197600A2011-10-06
JPH0433443B21992-06-03
JP2011120722A2011-06-23
JP2008065222A2008-03-21
JPH11218611A1999-08-10
JP4162334B22008-10-08
Other References:
See also references of EP 2983020A4
"Kinosei Shikiso no Oyo", CMC SHUPPAN CO., LTD., pages: 98 - 100
Attorney, Agent or Firm:
IWASE Yoshikazu et al. (JP)
Iwase Yoshiwa (JP)
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