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Patent Searching and Data


Title:
RETARDATION PLATE AND OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2023/276787
Kind Code:
A1
Abstract:
This retardation plate includes: a transparent base material; and a liquid crystal layer formed on the transparent base material. When a tensile test in which the retardation plate is pulled in a predetermined direction at a glass transition point of the transparent base material is conducted, if A represents the initial dimension of the retardation plate in the predetermined direction and B represents the dimension of the retardation plate in the predetermined direction at the time when a crack penetrating through the liquid crystal layer in the thickness direction has been generated on a surface of the liquid crystal layer over a length of 1 mm or greater, a tensile elongation C defined by a formula of C=(B-A)/A×100 is 12% or more.

Inventors:
SEKIKAWA KENTA (JP)
NAGAYAMA HIROMICHI (JP)
Application Number:
PCT/JP2022/024736
Publication Date:
January 05, 2023
Filing Date:
June 21, 2022
Export Citation:
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Assignee:
AGC INC (JP)
International Classes:
G02B5/30; G02B3/00; G02B5/04
Domestic Patent References:
WO2021065532A12021-04-08
WO2016114253A12016-07-21
Foreign References:
JP2008076533A2008-04-03
JP2004151690A2004-05-27
JP2015072410A2015-04-16
US20190337273A12019-11-07
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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