Investigation of liquid crystal alignment on the photo-alignment material PM4Ch surfaces

Jeoung Yeon Hwang, Dae Shik Seo, Dong Hack Suh

Research output: Contribution to journalArticle

Abstract

We synthesized the new photo-alignment material, PM4Ch (poly (4-methacryloyloxy chalcone)). Good thermal stabilities of synthesized PM4Ch were obtained by TGA (Thermogravimetric Analysis) measurement. The electro-optical (EO) characteristics of the photo-aligned twisted nematic (TN)-LC display (LCD), with linearly polarized UV exposure of normal direction on the PM4Ch surface were investigated. Monodomain alignments of the NLC by polarized UV exposure of normal direction on the PM4Ch surface were observed. The excellent voltage-transmittance curves for the photo-aligned TN-LCD on the PM4Ch surfaces were successfully obtained. Also, a fast response time for the photo-aligned TN-LCD on the PM4Ch surface can be achieved. Reduction of the DC voltage for the photo-aligned TN-LCD decreases with increasing UV exposure time on the PM4Ch surfaces.

Original languageEnglish
Pages (from-to)483-491
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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Liquid Crystals
Liquid crystals
liquid crystals
alignment
Display devices
Chalcone
Electric potential
electric potential
Thermogravimetric analysis
transmittance
Thermodynamic stability
thermal stability
direct current
curves

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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title = "Investigation of liquid crystal alignment on the photo-alignment material PM4Ch surfaces",
abstract = "We synthesized the new photo-alignment material, PM4Ch (poly (4-methacryloyloxy chalcone)). Good thermal stabilities of synthesized PM4Ch were obtained by TGA (Thermogravimetric Analysis) measurement. The electro-optical (EO) characteristics of the photo-aligned twisted nematic (TN)-LC display (LCD), with linearly polarized UV exposure of normal direction on the PM4Ch surface were investigated. Monodomain alignments of the NLC by polarized UV exposure of normal direction on the PM4Ch surface were observed. The excellent voltage-transmittance curves for the photo-aligned TN-LCD on the PM4Ch surfaces were successfully obtained. Also, a fast response time for the photo-aligned TN-LCD on the PM4Ch surface can be achieved. Reduction of the DC voltage for the photo-aligned TN-LCD decreases with increasing UV exposure time on the PM4Ch surfaces.",
author = "Hwang, {Jeoung Yeon} and Seo, {Dae Shik} and Suh, {Dong Hack}",
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N2 - We synthesized the new photo-alignment material, PM4Ch (poly (4-methacryloyloxy chalcone)). Good thermal stabilities of synthesized PM4Ch were obtained by TGA (Thermogravimetric Analysis) measurement. The electro-optical (EO) characteristics of the photo-aligned twisted nematic (TN)-LC display (LCD), with linearly polarized UV exposure of normal direction on the PM4Ch surface were investigated. Monodomain alignments of the NLC by polarized UV exposure of normal direction on the PM4Ch surface were observed. The excellent voltage-transmittance curves for the photo-aligned TN-LCD on the PM4Ch surfaces were successfully obtained. Also, a fast response time for the photo-aligned TN-LCD on the PM4Ch surface can be achieved. Reduction of the DC voltage for the photo-aligned TN-LCD decreases with increasing UV exposure time on the PM4Ch surfaces.

AB - We synthesized the new photo-alignment material, PM4Ch (poly (4-methacryloyloxy chalcone)). Good thermal stabilities of synthesized PM4Ch were obtained by TGA (Thermogravimetric Analysis) measurement. The electro-optical (EO) characteristics of the photo-aligned twisted nematic (TN)-LC display (LCD), with linearly polarized UV exposure of normal direction on the PM4Ch surface were investigated. Monodomain alignments of the NLC by polarized UV exposure of normal direction on the PM4Ch surface were observed. The excellent voltage-transmittance curves for the photo-aligned TN-LCD on the PM4Ch surfaces were successfully obtained. Also, a fast response time for the photo-aligned TN-LCD on the PM4Ch surface can be achieved. Reduction of the DC voltage for the photo-aligned TN-LCD decreases with increasing UV exposure time on the PM4Ch surfaces.

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