Dual-frequency cholesteric liquid crystal reflective display

Ming Xu; Deng Ke Yang

doi:10.1117/12.343858

26 March 1999 Dual-frequency cholesteric liquid crystal reflective display

Ming Xu, Deng Ke Yang

Proceedings Volume 3635, Liquid Crystal Materials, Devices, and Applications VII; (1999) https://doi.org/10.1117/12.343858
Event: Electronic Imaging '99, 1999, San Jose, CA, United States

Abstract

We developed a bistable cholesteric reflective display using a dual frequency cholesteric liquid crystal. When a high frequency voltage is applied to the matrices, it exhibits a negative dielectric anisotropy and is switched to the planar texture which is Bragg reflecting. When a low frequency voltage is applied to the materials, it exhibits a positive dielectric anisotropy and is switched to the focal conic texture which is weakly scattering. Both the planar texture and the focal conic texture are stable at zero field, and therefore the material can be used to make multiplexed displays with passive matrix. This new display can be directly switched between the planar texture and the focal conic texture, and therefore is suitable for displaying dynamic images.

Citation Download Citation

Ming Xu and Deng Ke Yang "Dual-frequency cholesteric liquid crystal reflective display", Proc. SPIE 3635, Liquid Crystal Materials, Devices, and Applications VII, (26 March 1999); https://doi.org/10.1117/12.343858

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