Liquid crystal aligning capabilities and EO characteristics of the photoaligned TN-LCD on a photo-crosslinkable polyamides based polymer

Jeoug Yeon Hwang, Dae Shik Seo, Dong Hack Suh

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In this work, synthesis of a photo-crosslinkable polyimide (polyimide (PI)-chalcone(Chal)-biphenyl (BP)) based polymer and electro-optical (EO) performances of photoaligned twisted nematic (TN) - liquid crystal displays (LCDs) using the two kinds of the photodimerization method with obliquely polarized UV exposure on a photopolymer were investigated. High pretilt angle of the NLC was measured by polarized UV exposure using the conventional photodimerization method on the PI-Chal-BP surface for 3 min. The high pretilt angle of the NLC generated in NLC is attributable to the biphenyl moieties and the photodimerized chalcone group of the photopolymer. The NLC pretilt angle, using the conventional photodimerization method was higher than that of a in-situ photodimerization method. Additionally, good voltage-transmittance (V-T) curves and response time for the photoaligned TN-LCD were observed by UV exposure on the PI-Chal-BP surface for 3 min using conventional photodimerization method. However, EO characteristics of the photoaligned TN-LCD on the PI-Chal-BP surface for 1 min using the in-situ photodimerization method were achieved.

Original languageEnglish
Pages (from-to)259/[1869]-268/[1878]
JournalMolecular Crystals and Liquid Crystals
Volume412
DOIs
Publication statusPublished - 2004 Dec 1
EventProceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom
Duration: 2002 Jun 302002 Jul 5

Fingerprint

Chalcone
Liquid Crystals
Nematic liquid crystals
Nylons
Liquid crystal displays
Polyamides
polyimides
Polyimides
Liquid crystals
Polymers
liquid crystals
polymers
Photopolymers
photopolymers
transmittance
diphenyl
Electric potential
electric potential
curves
synthesis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Liquid crystal aligning capabilities and EO characteristics of the photoaligned TN-LCD on a photo-crosslinkable polyamides based polymer",
abstract = "In this work, synthesis of a photo-crosslinkable polyimide (polyimide (PI)-chalcone(Chal)-biphenyl (BP)) based polymer and electro-optical (EO) performances of photoaligned twisted nematic (TN) - liquid crystal displays (LCDs) using the two kinds of the photodimerization method with obliquely polarized UV exposure on a photopolymer were investigated. High pretilt angle of the NLC was measured by polarized UV exposure using the conventional photodimerization method on the PI-Chal-BP surface for 3 min. The high pretilt angle of the NLC generated in NLC is attributable to the biphenyl moieties and the photodimerized chalcone group of the photopolymer. The NLC pretilt angle, using the conventional photodimerization method was higher than that of a in-situ photodimerization method. Additionally, good voltage-transmittance (V-T) curves and response time for the photoaligned TN-LCD were observed by UV exposure on the PI-Chal-BP surface for 3 min using conventional photodimerization method. However, EO characteristics of the photoaligned TN-LCD on the PI-Chal-BP surface for 1 min using the in-situ photodimerization method were achieved.",
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Liquid crystal aligning capabilities and EO characteristics of the photoaligned TN-LCD on a photo-crosslinkable polyamides based polymer. / Hwang, Jeoug Yeon; Seo, Dae Shik; Suh, Dong Hack.

In: Molecular Crystals and Liquid Crystals, Vol. 412, 01.12.2004, p. 259/[1869]-268/[1878].

Research output: Contribution to journalConference article

TY - JOUR

T1 - Liquid crystal aligning capabilities and EO characteristics of the photoaligned TN-LCD on a photo-crosslinkable polyamides based polymer

AU - Hwang, Jeoug Yeon

AU - Seo, Dae Shik

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AB - In this work, synthesis of a photo-crosslinkable polyimide (polyimide (PI)-chalcone(Chal)-biphenyl (BP)) based polymer and electro-optical (EO) performances of photoaligned twisted nematic (TN) - liquid crystal displays (LCDs) using the two kinds of the photodimerization method with obliquely polarized UV exposure on a photopolymer were investigated. High pretilt angle of the NLC was measured by polarized UV exposure using the conventional photodimerization method on the PI-Chal-BP surface for 3 min. The high pretilt angle of the NLC generated in NLC is attributable to the biphenyl moieties and the photodimerized chalcone group of the photopolymer. The NLC pretilt angle, using the conventional photodimerization method was higher than that of a in-situ photodimerization method. Additionally, good voltage-transmittance (V-T) curves and response time for the photoaligned TN-LCD were observed by UV exposure on the PI-Chal-BP surface for 3 min using conventional photodimerization method. However, EO characteristics of the photoaligned TN-LCD on the PI-Chal-BP surface for 1 min using the in-situ photodimerization method were achieved.

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