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High-efficiency multistable switchable glazing using smectic A liquid crystals
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DOI：10.1016/j.solmat.2008.10.023.png)
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En 中文
Presently, nematic polymer dispersed liquid crystals (PDLCs) that are used in switchable glazing technology require constant power to operate and, moreover, exhibit unwanted haze at wide viewing angles. In this paper, a novel switchable glazing technology, based around a bistable electro-optic effect in the Smectic A liquid crystal phase, is described which does not require constant power to operate or exhibit haze. The application of a low-frequency (100 Hz) voltage induces an optically opaque state due to the motion of ionic material whereas the application of a higher frequency AC (1 kHz) voltage induces a haze-free clear state. Multistable (greyscale) operation is possible through the application of intermediate frequencies or voltages; the threshold voltages of the effect were found to range from 36 to 66 V rms. Any voltage-induced state is preserved indefinitely after removal of the voltage leading to low power consumption. (C) 2008 Elsevier B.V. All rights reserved.
Keyword:
Liquid crystal
Glazing
Smectic A
Bistable
Multistable
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期刊
IF:
6.3
论文数:
1.2W
被引数:
3.6W
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