Fast response characteristics in liquid crystal display in operating mode of the nematic liquid crystal

Yu Han Bae, Jeoung Yeon Hwang, Kang Woo Kim, Dae Shik Seo

Research output: Contribution to journalArticle

Abstract

In this study, we investigated response characteristics of liquid crystal display (LCD) with different operating mode of nematic liquid crystals (NLCs) such as 45° twisted nematic (TN), 67.3° TN and electrical controlled birefringence (ECB) on the rubbed polyimide (PI) surface with side chains. The pretilt angles generated on polyimide surfaces of the three kinds of LCD operating modes were about 12° that was higher than those of conventional TN-LCDs. Also, the Electro-optical (EO) performance of these LCDs showed stable condition. Low transmittance of the 45° TN and 67.3° TN cell on the rubbed PI surface were measured by using low cell gap d. The fast response time in ECB cell among the three kinds of LCD operating modes was achieved. Also, the electro-optical characteristic of three kinds of TN-LCD on the rubbed PI surface was investigated. The threshold voltage and the response time of thermal stressed TN-LCDs showed the same performances on no thermal stressed TN-LCDs. There was little change of value in these TN cells. However, the transmittances of TN-LCDs on the rubbed PI surface decreased while increasing thermal stress time. Therefore, the thermal stability of TN-LCD was decreased by the high thermal stress for the long duration.

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

Fingerprint

Nematic liquid crystals
Liquid crystal displays
polyimides
liquid crystals
Polyimides
thermal stresses
cells
birefringence
transmittance
Birefringence
Thermal stress
threshold voltage
thermal stability
Threshold voltage
Thermodynamic stability

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "In this study, we investigated response characteristics of liquid crystal display (LCD) with different operating mode of nematic liquid crystals (NLCs) such as 45° twisted nematic (TN), 67.3° TN and electrical controlled birefringence (ECB) on the rubbed polyimide (PI) surface with side chains. The pretilt angles generated on polyimide surfaces of the three kinds of LCD operating modes were about 12° that was higher than those of conventional TN-LCDs. Also, the Electro-optical (EO) performance of these LCDs showed stable condition. Low transmittance of the 45° TN and 67.3° TN cell on the rubbed PI surface were measured by using low cell gap d. The fast response time in ECB cell among the three kinds of LCD operating modes was achieved. Also, the electro-optical characteristic of three kinds of TN-LCD on the rubbed PI surface was investigated. The threshold voltage and the response time of thermal stressed TN-LCDs showed the same performances on no thermal stressed TN-LCDs. There was little change of value in these TN cells. However, the transmittances of TN-LCDs on the rubbed PI surface decreased while increasing thermal stress time. Therefore, the thermal stability of TN-LCD was decreased by the high thermal stress for the long duration.",
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Fast response characteristics in liquid crystal display in operating mode of the nematic liquid crystal. / Bae, Yu Han; Hwang, Jeoung Yeon; Kim, Kang Woo; Seo, Dae Shik.

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

Research output: Contribution to journalArticle

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