Bistable liquid-crystal phase grating device for smart window and window display applications

Jae-Won Huh; Tae-Hoon Choi; Jae-Hyeon Woo; Jin-Hun Kim; Su-Min Do; Jeong-Ho Seo; Tae-Hoon Yoon

doi:10.1117/12.2543475

25 February 2020 Bistable liquid-crystal phase grating device for smart window and window display applications

Jae-Won Huh, Tae-Hoon Choi, Jae-Hyeon Woo, Jin-Hun Kim, Su-Min Do, Jeong-Ho Seo, Tae-Hoon Yoon

Proceedings Volume 11303, Emerging Liquid Crystal Technologies XV; 113030J (2020) https://doi.org/10.1117/12.2543475
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

A liquid crystal (LC) phase grating devices have been studied actively because of their outstanding features, such as the high diffraction efficiency, large diffraction angle, no diffraction at the initial state, and the simple fabrication process. It can be used to control the haze value owing to its high diffraction efficiency. Although it can be operated with low power, power consumption needs to be further reduced because it requires power to maintain the diffraction. To reduce the power consumption in a phase grating device, bistable operation, which consumes power only while it is being switched between the states, is necessary. In this paper, we will introduce bistable LC phase grating devices which can provide a translucent state with a high haze value thanks to its strong diffraction. Moreover, it can be operated with very low power as the transparent [translucent] state is maintained even after the applied vertical [in-plane] electric field is removed. We believe that these devices can be one of the new candidates for power-saving smart window or window display applications.

Conference Presentation

Citation Download Citation

Jae-Won Huh, Tae-Hoon Choi, Jae-Hyeon Woo, Jin-Hun Kim, Su-Min Do, Jeong-Ho Seo, and Tae-Hoon Yoon "Bistable liquid-crystal phase grating device for smart window and window display applications", Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 113030J (25 February 2020); https://doi.org/10.1117/12.2543475

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