Abstract
In this chapter we describe and discuss the two nematic liquid crystal display modes, the twisted nematic and supertwisted nematic, which dominated the early years of LCD technology and remain important today. The construction, operation, and optical properties of both modes are described together with their multiplexing performance.
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Abbreviations
- Δε = ε // − ε ⊥ :
-
Permittivity anisotropy
- ε //, ε ⊥ :
-
Electric permittivity along and normal to the director, respectively
- Δn = n // − n ⊥ :
-
Optical anisotropy
- n //, n ⊥ :
-
Refractive index along and normal to the director, respectively
- k 11, k 22, k 33 :
-
Splay, twist, and bend elastic constants, respectively
- LCD:
-
Liquid crystal display
- N:
-
Number of lines in a matrix
- Pre-tilt:
-
Angle between director and the planar surface
- rms:
-
Root mean square
- STN:
-
Supertwisted nematic liquid crystal
- TFT:
-
Thin-film transistor
- TN:
-
Twisted nematic liquid crystal
- V sel, V unsel :
-
Select and unselect voltages, respectively
Further Reading
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Bradshaw MJ, Raynes EP (1983) Mol Cryst Liq Cryst 91:145
Bradshaw MJ, Raynes EP (1986) Mol Cryst Liq Cryst 138:307
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Gooch CH, Tarry HA (1975) J Phys D Appl Phys 8:1575
Mauguin C (1911) Bull Soc Fr Miner 34:71
Okumura O, Nagata M, Wada K (1987) ITEJ Tech Rep 11:27
Raynes EP (1975) Rev Phys Appl 10:117
Raynes EP (1986) Mol Cryst Liq Cryst Lett 4:1
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Waters CM, Brimmell V, Raynes EP (1983) Proceedings of the third international display research conference, Kobe, p 396
Waters CM, Raynes EP, Brimmell V (1985) Mol Cryst Liq Cryst 123:303
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© 2014 Springer-Verlag Berlin Heidelberg
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Raynes, P. (2014). Twisted Nematic and Supertwisted Nematic LCDs. In: Chen, J., Cranton, W., Fihn, M. (eds) Handbook of Visual Display Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35947-7_88-2
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DOI: https://doi.org/10.1007/978-3-642-35947-7_88-2
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Publisher Name: Springer, Berlin, Heidelberg
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