Homogeneous Photoalignment of Liquid Crystals without Precoated Alignment Layers

Homogeneously aligned liquid crystal (LC) cell was fabricated using nematic LCs (NLCs) doped with a polymerizable monomer comprising of photocrosslinkable mesogenic side groups, combined with the linearly polarized UV light exposure at elevated temperature. We have clarified that the photosensitive...

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Bibliographic Details
Published in:Journal of Photopolymer Science and Technology 2019/06/24, Vol.32(4), pp.549-552
Main Authors: Kotera, Koichi, Kondo, Mizuho, Goto, Kohei, Minami, Satoshi, Sasaki, Tomoyuki, Noda, Kohei, Ono, Hiroshi, Kawatsuki, Nobuhiro
Format: Article
Language:English
Subjects:
Alignment
High temperature
In-plane LC switching
Linear polarization
Liquid crystal display
Liquid crystals
Photoalignment
Photosensitivity
Polymerization
Substrates
Ultraviolet radiation
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Description
Summary:Homogeneously aligned liquid crystal (LC) cell was fabricated using nematic LCs (NLCs) doped with a polymerizable monomer comprising of photocrosslinkable mesogenic side groups, combined with the linearly polarized UV light exposure at elevated temperature. We have clarified that the photosensitive layer forms on the substrates via the thermal polymerization, followed by generating the NLC photoalignment based on the axis-selective photocrosslinking. The LC characteristics of the photosensitive side groups of the polymerizable material play an important role in the defect-free alignment for the NLCs.
ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.32.549