Lower operation voltage in dual-frequency cholesteric liquid crystals based on the thermodielectric effect

Yu Cheng Hsiao, Wei Lee

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Dual-frequency cholesteric liquid crystal (DFCLC) devices characteristically require high operation voltage, which hinders their further development in thin-film-transistor driving. Here we report on a lowervoltage switching method based on the thermodielectric effect. This technique entails applying a high-frequency voltage to occasion dielectric oscillation heating so to induce the increase in crossover frequency. The subsequent change in dielectric anisotropy of the DFCLC allows the switching, with a lower operation voltage, from the planar state to the focal conic or homeotropic state. The temperature rise incurred by the dielectric heating is described.

Original languageEnglish
Pages (from-to)23927-23933
Number of pages7
JournalOptics Express
Volume21
Issue number20
DOIs
StatePublished - 7 Oct 2013

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