Study of a liquid crystal structure with improved electro-optical characteristics

Ji Hun Lim, Byeong Yun Oh, Byoung Yong Kim, Young Hwan Kim, Kang Min Lee, Jeoung Min Han, Sang Keuk Lee, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


This paper introduces the vertically aligned twisted nematic in-plane switching (VPS) structure, and compares the electro-optical (EO) characteristics of VPS liquid crystal displays (LCDs) and in-plane switching (IPS) LCDs. Various VPS-LCD pretilt angles were induced, and ion beam (IB) irradiation was used to enhance the EO properties. An x-ray photoelectron spectroscopic analysis of the IB-irradiated polymer surface confirmed that the intensity of C=O bonding as a function of exposure time traced the pretilt angles. The pretilt angle effect on optical properties was first analyzed in the experimental results. While multidomain vertical alignment LCDs and IPS-LCDs only resolve one difficulty, the VPS-LCDs described here overcome several viewing angle and transmittance curve problems.

Original languageEnglish
Article number014504
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 2009

Bibliographical note

Funding Information:
This study was supported by the Ministry of Knowledge Economy (MKE), Korea, under the Information Technology Research Center (ITRC) support program supervised by the Institute of Information Technology Advancement (No. IITA-2008-C1090-0801-0018), and the Brain Korea 21 (No. BK 21) Fellowship from the Ministry of Education of Korea.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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