Suitable Choice of Optical Compensation Film Based on Inclined Optical Indicatrix for Twisted-Nematic Liquid-Crystal Displays
In: Japanese Journal of Applied Physics, Jg. 42 (2003-07-15), S. 4416-4420
Online
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Zugriff:
A suitable compensation film composed of discotic compounds and a triacetylcellose (TAC) substrate was chosen through a process of experiment in order to improve the viewing characteristics of twisted nematic liquid crystal displays (TN-LCDs). A suitable selection was also carried out in terms of the color-shift in the black-state. In particular, in the upper direction, the viewing angle with the contrast ratio of 50:1 and higher increased greatly from 25° to 50°. Furthermore, the color difference between the viewing angles of 0° and 60° was kept at 0.045 of the Commission Internationale de l'Eclairage (CIE) 1967 (u',v') uniform-chromaticity-scale (UCS) diagram. Moreover, in order to obtain a high contrast ratio from the normal direction, we found out that the retardation value (Re) of the compensation film should be near 40–45 nm in the case of TN-LCDs where Δnd equals 391 nm.
| Titel: |
Suitable Choice of Optical Compensation Film Based on Inclined Optical Indicatrix for Twisted-Nematic Liquid-Crystal Displays
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| Autor/in / Beteiligte Person: | Sakai, Akira ; Ishii, Yutaka ; Inoue, Iichiro ; Yamahara, Motohiro ; Yamada, Yuichiro ; Mizushima, Shigeaki |
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| Zeitschrift: | Japanese Journal of Applied Physics, Jg. 42 (2003-07-15), S. 4416-4420 |
| Veröffentlichung: | IOP Publishing, 2003 |
| Medientyp: | unknown |
| ISSN: | 1347-4065 (print) ; 0021-4922 (print) |
| DOI: | 10.1143/jjap.42.4416 |
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