Investigation of liquid crystal aligning capabilities using a new photoalignment method on the photopolymer surfaces

Jeoung Yeon Hwang, Hyung Kyu Kim, Dae Shik Seo, Dong Hack Suh

Research output: Contribution to journalArticle

Abstract

In this work, we have investigated the liquid crystal (LC) aligning capabilities and the electro-optical (EO) characteristics for the photo-aligned twisted nematic (TN) cell with linearly polarized UV exposure of normal direction on the PMCh (poly (4-methacryloyloxy chalcone)) surfaces using a new photo-alignment method. Good thermal stabilities of synthesized PMCh were obtained by TGA (Thermogravimetric Analysis) measurement. The excellent voltage transmittance (V-T) curve of the photo-aligned TN-LCD with UV exposure on the PMCh surface for 1 min using a new photodimerization method was observed. The voltage holding ratio (VHR) of the photo-aligned TN-LCD with photodimerized on the PMCh surface using a new photodimerization method was higher than that of a conventional photo-dimerization method. Consequently, a good LC aligning capabilities using a new photo-alignment method can be achieved.

Original languageEnglish
Pages (from-to)493-501
Number of pages9
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume368
DOIs
Publication statusPublished - 2001 Jan 1

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Photopolymers
Liquid Crystals
photopolymers
Liquid crystals
liquid crystals
Liquid crystal displays
alignment
Chalcone
Dimerization
Electric potential
electric potential
dimerization
Thermogravimetric analysis
transmittance
Thermodynamic stability
thermal stability
curves
cells

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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abstract = "In this work, we have investigated the liquid crystal (LC) aligning capabilities and the electro-optical (EO) characteristics for the photo-aligned twisted nematic (TN) cell with linearly polarized UV exposure of normal direction on the PMCh (poly (4-methacryloyloxy chalcone)) surfaces using a new photo-alignment method. Good thermal stabilities of synthesized PMCh were obtained by TGA (Thermogravimetric Analysis) measurement. The excellent voltage transmittance (V-T) curve of the photo-aligned TN-LCD with UV exposure on the PMCh surface for 1 min using a new photodimerization method was observed. The voltage holding ratio (VHR) of the photo-aligned TN-LCD with photodimerized on the PMCh surface using a new photodimerization method was higher than that of a conventional photo-dimerization method. Consequently, a good LC aligning capabilities using a new photo-alignment method can be achieved.",
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