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Journal of Applied Physics

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The difference between the equilibrium and switching d/p ratio of a bistable twisted nematic (BTN) liquid crystal display is shown by computer simulation. It is clearly indicated that the optimized d/p ratio has to be determined by the switching rather than equilibrium d/p ratio. It is also shown that the switching d/p ratio is related not only to the pre-tilt angle, but also to liquid crystal viscosities, which indirectly indicates how temperature will affect the BTN device, and that there exists an optimized delay time for the device-driving waveform which will narrow the selection pulse and increase the matrix driving scanning speed. Further, the trade-off between the width of the waveform selection pulse and cell thickness tolerance is considered. By applying the determined optimized conditions and using the multidimensional alignment method, a long-term bistable BTN effect can be demonstrated. (C) 2001 American Institute of Physics.


Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 90, 552 (2001) and may be found at

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