標題: A Simple Method to Measure Pretilt Angles of Inverse Twisted Nematic Liquid Crystal Cells
作者: Wang, Sheng-Ya
Lin, Chia-Yi
Yang, Kei-Hsiung
交大名義發表
National Chiao Tung University
關鍵字: Inverse twisted nematic (ITN);liquid crystals (LCs);measurement;phase measurement;pretilt angle
公開日期: 1-十二月-2014
摘要: We have developed a simple optical method based on measurements of phase retardation[1] versus out-of-plane cell rotation angle and data analyzed by extended Jones matrix method to obtain pretilt angles of inverse twisted nematic (ITN) and tilted homeotropic liquid crystal (LC) cells. In our Jones-matrix calculations, we have assumed a constant pretilt angle as the LC-director tilt angles throughout the ITN cell as well as the tilted homeotropic cell. We have compared the measured pretilt angles of the ITN cell with those of an accompanying tilted homeotropic (ATH) cell. The results showed increasing discrepancies between them with increasing rubbing depth for LC alignments. However, these discrepancies could be explained by assuming that the surface-LC tilt angle of the ITN cell was equal to the measured pretilt angle of the ATH cell to generate a convex-type LC-director-deformation profile within the ITN cell based on Oseen-Frank elastic continuum theory with infinite anchoring energies. The average of the LC-director tilt angles over this profile was equivalent to the measured pretilt angle of the ITN cell.
URI: http://dx.doi.org/10.1109/JDT.2014.2334897
http://hdl.handle.net/11536/123882
ISSN: 1551-319X
DOI: 10.1109/JDT.2014.2334897
期刊: JOURNAL OF DISPLAY TECHNOLOGY
Volume: 10
Issue: 12
起始頁: 1024
結束頁: 1029
顯示於類別:期刊論文


文件中的檔案:

  1. 000345236100006.pdf