Electro-optical characteristics of photoaligned TN cell using UV alignment on the a-C:H thin film

Jeoung Yeon Hwang, Hyung Ku Kang, Chang Joon Park, Dae-Shik Seo, Sung Hoon Lim, Kyu Chang Park, Jin Jang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We studied the nematic liquid crystal (NLC) alignment capability by the UV alignment method on a a-C:H thin-film surface, and investigated electro-optical performances of the UV aligned twisted nematic (TN)- liquid crystal display (LCD) with the UV exposure on a-C:H thin film surface. A good LC alignment by UV irradiation on a a-C:H thin-film surface at a layer thickness of 200A° was achieved. Also, a good LC alignment by the UV alignment method on the a-C:H thin film surface was observed at an annealing temperature of 180°C. However, the alignment defect of the NLC was observed at an annealing temperature above 200°C. Monodomain alignment of the UV aligned TN-LCD can be observed. The best electro-optical (EO) characteristics of the UV aligned TN-LCD in the photoaligned TN-LCDs was observed with oblique ion beam exposure on the a-C:H thin film surface for 1 min.

Original languageEnglish
JournalMolecular Crystals and Liquid Crystals
Volume434
DOIs
Publication statusPublished - 2005 Dec 1

Fingerprint

Nematic liquid crystals
alignment
Thin films
Liquid crystal displays
liquid crystals
thin films
cells
Annealing
annealing
Ion beams
ion beams
Irradiation
Temperature
Defects
irradiation
temperature
defects

All Science Journal Classification (ASJC) codes

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

Cite this

Hwang, Jeoung Yeon ; Kang, Hyung Ku ; Park, Chang Joon ; Seo, Dae-Shik ; Lim, Sung Hoon ; Park, Kyu Chang ; Jang, Jin. / Electro-optical characteristics of photoaligned TN cell using UV alignment on the a-C:H thin film. In: Molecular Crystals and Liquid Crystals. 2005 ; Vol. 434.
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abstract = "We studied the nematic liquid crystal (NLC) alignment capability by the UV alignment method on a a-C:H thin-film surface, and investigated electro-optical performances of the UV aligned twisted nematic (TN)- liquid crystal display (LCD) with the UV exposure on a-C:H thin film surface. A good LC alignment by UV irradiation on a a-C:H thin-film surface at a layer thickness of 200A° was achieved. Also, a good LC alignment by the UV alignment method on the a-C:H thin film surface was observed at an annealing temperature of 180°C. However, the alignment defect of the NLC was observed at an annealing temperature above 200°C. Monodomain alignment of the UV aligned TN-LCD can be observed. The best electro-optical (EO) characteristics of the UV aligned TN-LCD in the photoaligned TN-LCDs was observed with oblique ion beam exposure on the a-C:H thin film surface for 1 min.",
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Electro-optical characteristics of photoaligned TN cell using UV alignment on the a-C:H thin film. / Hwang, Jeoung Yeon; Kang, Hyung Ku; Park, Chang Joon; Seo, Dae-Shik; Lim, Sung Hoon; Park, Kyu Chang; Jang, Jin.

In: Molecular Crystals and Liquid Crystals, Vol. 434, 01.12.2005.

Research output: Contribution to journalArticle

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T1 - Electro-optical characteristics of photoaligned TN cell using UV alignment on the a-C:H thin film

AU - Hwang, Jeoung Yeon

AU - Kang, Hyung Ku

AU - Park, Chang Joon

AU - Seo, Dae-Shik

AU - Lim, Sung Hoon

AU - Park, Kyu Chang

AU - Jang, Jin

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