Security use of bilayer dichroic films made of liquid crystal polymer networks

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We report on bilayer dichroic dye-doped liquid crystal (BDLC) films for patternable color codes, which can be used in anti-counterfeiting applications such as security codes and, unlike the conventional single-layer LC color films, show unique color changes depending on the direction of the polarization of the incident light that passes through them. This is a facile way to enhance the security level of security codes. BDLC films are fabricated by laminating two single-layer LC polymer network films with crossed optical axes. We believe that BDLC films can be used as a new platform for a security-enhanced anti-counterfeiting code that can replace complex chiral materials or expensive plasmonic particles.
Publisher
TAYLOR & FRANCIS LTD
Issue Date
2021-07
Language
English
Article Type
Article
Citation

JOURNAL OF INFORMATION DISPLAY, v.22, no.3, pp.173 - 178

ISSN
1598-0316
DOI
10.1080/15980316.2021.1905723
URI
http://hdl.handle.net/10203/287258
Appears in Collection
CH-Journal Papers(저널논문)
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