1. Study of a liquid crystal structure with improved electro-optical characteristics.
- Author
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Lim, Ji-Hun, Oh, Byeong-Yun, Kim, Byoung-Yong, Kim, Young-Hwan, Lee, Kang-Min, Han, Jeoung-Min, Lee, Sang-Keuk, and Seo, Dae-Shik
- Subjects
SWITCHING systems (Telecommunication) ,LIQUID crystal displays ,POLYMERS ,ION bombardment ,LIGHT sources ,IRRADIATION - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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