Method for preparing bistable dimming device and bistable dimming device

Abstract

The invention discloses a method for preparing a bistable dimming device and the bistable dimming device. The method includes the following steps of: performing directional arrangement on each first surface in two transparent substrates that both have the first surface in one direction respectively, wherein each first surface is provided with a transparent electrode; performing aligned arrangementon the two transparent substrates in a manner that the first surfaces are opposite to each other; laminating the two transparent substrates subjected to aligned arrangement by using a sealant, and adding a spacer between the two transparent substrates to control the gap between the two transparent substrates; filling an isotropous liquid crystal composition in the gap between the two transparentsubstrates to form a liquid crystal layer, wherein the liquid crystal composition includes a double mesocrystal compound, a nematic liquid crystal compound and a chiral compound; and curing the seal to form a bistable dimming device with basically uniform thickness, wherein the bistable dimming device includes two zero electric field stability states: a transmission state that makes the incident light basically transmitted and a fog state that makes the incident light basically scattered. According to the scheme of the invention, the preparation process can be simplified, the cost can be saved, and the yield of products can be improved.

Description

technical field [0001] The invention relates to a preparation method of a dimming device, in particular to a preparation method of a bistable dimming device and a bistable dimming device prepared by the method. Background technique [0002] Dimmable glass, as one of the most commonly used building materials, has traditional characteristics such as safety, durability, clarity and light transmission, and also has the function of adjusting light transmittance according to needs, thus endowing glass with new functions, such as preventing ultraviolet rays and infrared rays from entering, Increased privacy, etc. The liquid crystal-based dimming technology is one of the rapidly developing technologies. [0003] The commonly used liquid crystal-based dimming technology adopts polymer dispersed liquid crystal (PDLC) technology, which uses nematic liquid crystal and polymer to form PDLC, controls the alignment state of liquid crystal, and realizes the conversion between the light-tra...

AI Technical Summary

Problems solved by technology

However, these two technologies need to introduce polymers in the production process to provide a stable polymer network structure for liquid crystals, and the degree of perfection of phase separation between liquid crystals and polymers, the speed of phase separation, the two-phase structure and morphology, and the interface The structure and properties depend on the production process, so there are strict requirements on the preparation method and process conditions, which increases the complexity and difficulty of the production process and increases the production cost

At the same time, the performance of the prepared dimming device strongly depends on the liquid crystal and polymer phase composition, morphology, size, properties of the phase interface and the matching of the properties of the two phases, which further limits the application of dimming devices.

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