8 February 2018 Control of haze value using electrically switchable liquid crystal phase grating devices
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Abstract
We introduce an electrically switchable two-dimensional liquid crystal (LC) phase grating device for window display applications. The device consists of the top and bottom substrates with crossed interdigitated electrodes and vertically aligned LCs sandwiched between the two substrates. The device, switchable between the transparent and translucent states by applying an electric field, can provide high haze by the strong diffraction effect with little dependence on the azimuth angle owing to a large spatial phase difference. This device exhibits outstanding features, such as a low operating voltage, high transmittance, and wide viewing angle in the transparent state and a high haze in the translucent state. In addition, the LC device can provide sub-millisecond switching between the transparent and translucent states with the use of an overdrive scheme and a vertical trigger pulse.
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Tae-Hoon Choi, Tae-Hoon Choi, Jae-Hyeon Woo, Jae-Hyeon Woo, Jae-Won Huh, Jae-Won Huh, Byoung-Gyu Jeon, Byoung-Gyu Jeon, Tae-Hoon Yoon, Tae-Hoon Yoon, } "Control of haze value using electrically switchable liquid crystal phase grating devices", Proc. SPIE 10555, Emerging Liquid Crystal Technologies XIII, 105551E (8 February 2018); doi: 10.1117/12.2289272; https://doi.org/10.1117/12.2289272
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