Dual frequency bistable liquid crystal display and its liquid crystal composition

Abstract

The invention discloses a double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition. The double-frequency bi-stable liquid crystal composition made by mixing double-frequency liquid crystal, chiral composition and nematic phase liquid crystal composition is poured into a liquid crystal box; through the component ratio and chemical features of the double-frequency bi-stable liquid crystal composition, the liquid crystal composition mixed has the features of both the double-frequency liquid crystal and the cholesteric phase liquid crystal, under driving of a frequency modulation mode, two optical statuses, namely focal conic texture and planar texture, can be converted through dielectric anisotropy of the liquid crystal, and an image can be displayed; thus, the double-frequency bi-stable liquid crystal display can be in the two optical statuses without voltage maintaining or decomposing the helix structure of the cholesteric phase liquid crystal through high voltage; dielectric conversion is not related to metastable state conversion, power consumption of the double-frequency bi-stable liquid crystal display is effectively reduced, and conversion time is effectively shortened.

Description

technical field [0001] The present invention relates to a liquid crystal display and its liquid crystal composition, in particular to a liquid crystal composition with dual-frequency and bistable characteristics inside, which can control the alignment direction of liquid crystals in an ultra-low span frequency range to achieve display effects monitor. Background technique [0002] The unique photoelectric characteristics of liquid crystals can display images for display purposes after voltage is applied, such as e-readers, mobile phones, electronic tags and other devices. The power consumption requirements for displays are very low and the usable period is usually more than five years , so the development of "bistable liquid crystal display" is mainly to set nematic liquid crystal or cholesteric liquid crystal in the display, cooperate with the appropriate design of the device parameters and related parameters of the liquid crystal, and use the voltage These specific liquid...

AI Technical Summary

Problems solved by technology

[0005] It is worth noting that the above-mentioned general nematic liquid crystal or dual-frequency nematic liquid crystal will form a metastable state that requires high voltage to support operation during the conversion process of two stable arrangements (vertical↔parallel, or parallel↔parallel). In the intermediate state, there is still the problem of high power consumption

In addition, after the aforementioned cholerous phase liquid crystal (SSCT) removes the voltage, the conversion between the two stable states will involve complex electrohydrodynamics, resulting in the problem of long response time of the display.

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