Control of haze value using electrically switchable liquid crystal phase grating devices

Tae-Hoon Choi; Jae-Hyeon Woo; Jae-Won Huh; Byoung-Gyu Jeon; Tae-Hoon Yoon

doi:10.1117/12.2289272

8 February 2018 Control of haze value using electrically switchable liquid crystal phase grating devices

Tae-Hoon Choi, Jae-Hyeon Woo, Jae-Won Huh, Byoung-Gyu Jeon, Tae-Hoon Yoon

Proceedings Volume 10555, Emerging Liquid Crystal Technologies XIII; 105551E (2018) https://doi.org/10.1117/12.2289272
Event: SPIE OPTO, 2018, San Francisco, California, United States

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.

Citation Download Citation

Tae-Hoon Choi, Jae-Hyeon Woo, Jae-Won Huh, Byoung-Gyu Jeon, and 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); https://doi.org/10.1117/12.2289272

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