Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DISPLAY MEDIUM, AUTHENTICITY DETERMINATION METHOD, AND ARTICLE INCLUDING DISPLAY MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/261923
Kind Code:
A1
Abstract:
Provided is a display medium including a first layer, a second layer, and a third layer, in which: all or part of the first layer, all or part of the second layer, and all or part of the third layer are stacked in this order in a thickness direction; the first layer can reflect circularly polarized light having a rotation direction D1, and can transmit circularly polarized light having a rotation direction D2 which is opposite the rotation direction D1; the second layer is a retardation layer; and the third layer can reflect circularly polarized light of which the rotation direction is the rotation direction D1, and can transmit circularly polarized light of which the rotation direction is the rotation direction D2.

Inventors:
FUJINO YASUHIDE (JP)
Application Number:
PCT/JP2020/022170
Publication Date:
December 30, 2020
Filing Date:
June 04, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ZEON CORP (JP)
International Classes:
G02B5/30; B42D25/364
Domestic Patent References:
WO2007018258A12007-02-15
WO2020004155A12020-01-02
Foreign References:
JP2000255200A2000-09-19
JP2010196005A2010-09-09
JP2008197223A2008-08-28
US20070053028A12007-03-08
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF: