Electro-optical characteristics of photo-aligned vertical-alignment cells on photo-crosslinkable copolymer surfaces containing the cholesteryl moiety

Jeoung Yeon Hwang, Dae Shik Seo, Eun Joo Hahn

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1 Citation (Scopus)

Abstract

The electro-optical (EO) performances of a photoaligned vertical-alignment liquid crystal display (VA-LCD) on a copoly(4-methacryloyloxychalcone-cholesteryl methacrylate) surface for homeotropic LC alignment were studied. Good thermal stability of the synthesized photo-crosslinkable copolymer was seen during thermogravimetric analysis. A good voltage-transmittance curve and fast response time achieved in the photoaligned VA-LCD with obliquely polarized UV exposure at 30° from the vertical on the photo-crosslinkable copolymer surfaces. The EO characteristics of the photoaligned VA-LCD decreased after long time UV exposure because of dissociation of the ester linkage in the chalcone structure of the photo-crosslinkable polymer.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalLiquid Crystals
Volume29
Issue number4
DOIs
Publication statusPublished - 2002 Apr 10

All Science Journal Classification (ASJC) codes

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

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