Bistable liquid crystal device with optical writing or optical erasing function and preparation method thereof

A bistable liquid crystal and optical writing technology, which is applied in the fields of instruments, optics, nonlinear optics, etc., can solve problems such as difficult control and complicated process, and achieve the effects of simple processing, simple synthesis, and large-area production
CN107315270BActive Publication Date: 2020-07-03PEKING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2020-07-03

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Abstract

The invention discloses a bistable liquid crystal device with an optical writing or optical erasing function and a preparation method thereof. The bistable liquid crystal device comprises a liquid crystal box or liquid crystal film with the thickness of 2-200 micrometers, and a photoresponsive cholesteric liquid crystal composite system is poured into the liquid crystal box or the liquid crystal film; the photoresponsive cholesteric liquid crystal composite system is prepared from, by mass, 60.0 wt%-97.0 wt% of main micro-molecular liquid crystal materials, 0.5 wt%-15.0 wt% of chiral helicene compounds and 0.2 wt%-30.0 wt% chiral compounds; the initial pitch of the photoresponsive cholesteric liquid crystal composite system is p0, and the pitch rises to p1 or decreases to p2 under the irradiation of excitation light. Through a simple process, the cholesteric liquid crystal device capable of stably switching between a planar texture state and a focal conic texture state under the condition of remote non-contact illumination radiation is prepared.
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Description

technical field

[0001] The invention belongs to the field of bistable liquid crystal materials and devices. Specifically, the invention provides a bistable liquid crystal device with optical writing or optical erasing function and a preparation method thereof. The prepared liquid crystal device can be remotely and non-contact Under the light irradiation conditions of the formula, the planar texture and the focal conic texture of the cholesteric liquid crystal can be regulated and switched, and the characteristics of optical writing or optical erasing in different display modes can be achieved. The liquid crystal device can be widely used in the research of liquid crystal display, information storage, electronic tablet, smart glass, adjustable grating and related fields. Background technique

[0002] Since liquid crystal was discovered in 1888, it has developed vigorously in the past 20 years. From the popular electronic watch to the current electronic paper, electronic book...

Claims

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