Liquid crystal handwriting device and manufacturing method thereof

Abstract

The invention provides a liquid crystal handwriting device. The liquid crystal handwriting device consists of a first substrate, a second substrate, cholesteric liquid crystals, a first layer of polymer and a second layer of polymer; the first substrate and the second substrate are glass or plastic films; the first substrate is a transparent or frosted transparent substrate; the second substrate is a black or transparent substrate. A manufacturing method of the liquid crystal handwriting device comprises the following steps: selecting base materials; preparing the cholesteric liquid crystals; preparing a mixture; coating a film; irradiating; inspecting. According to the liquid crystal handwriting device and the manufacturing method thereof, handwriting can be produced by sensing a pressure so as to realize a handwriting function; the handwriting is not required to be maintained by supplying power continuously, an additional electric field is not required to be applied, the handwriting can be eliminated automatically along with time; the liquid crystal handwriting device has the characteristics of high contrast ratio, low cost and the like, and has huge application space in the fields of spot fast memory training, enterprise and militarized private communication and the like.

Description

technical field [0001] The invention relates to a liquid crystal handwriting device, in particular to a handwriting device with high contrast, pressure writing and self-erasing handwriting. Background technique [0002] In the field of liquid crystal display, the handwriting function based on the bistable liquid crystal and the energy-saving feature that does not require continuous power supply to maintain the display have gradually been more and more widely used. [0003] Cholesteric liquid crystal materials for display are generally prepared by nematic liquid crystals and chiral agents, which have selective reflection of incident light. For multi-color low-power reflective liquid crystal displays, only when the optical activity of incident light and The cholesteric liquid crystal layer is consistent and the wavelength is reflected when the Bragge formula is satisfied, that is, the wavelength λ of the incident light is related to the pitch P and the average refractive index...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, to solve a liquid crystal handwriting device that can self-eliminate handwriting, to overcome the technical problems of low contrast and the need to use electricity to eliminate handwriting

Images