Method of preparation of surface coating of variable transmittance and electro-optical appliance including the same

摘要

Method of preparation of surface coating of variable transmittance and an electro-optical layered appliance including the same comprises dispersing of liquid crystal microdroplets in hydrolyzable and polymerizable precursors and applying obtained mixture on a surface by spraying. Applying the material to the surface by spraying is intrinsically related to the synthesis processes because the properties of the surrounding environment (i.e. content of water and acidity, UV radiation) and the chemical reactions that take place during spraying have considerable influence on the properties (i.e. driving voltage, thickness of obtained layer). Obtained layered appliance comprises of a matrix material with dispersed microdroplets of liquid crystal obtained by the described method, electrically conductive transparent electrodes with contacts, a dielectric material, substrate and covering layers.

主权项

1. A method of preparation of a surface coating of electrically variable transmittance, which comprises the steps of dispersing liquid crystal microdroplets in a mixture of an alkoxide and a solvent, and forming a hydrolyzable and polymerizable precursor, wherein said hydrolyzable and polymerizable precursor is sprayed through an acidic water vapour atmosphere on a substrate coated with an electrically conductive and transparent film,
whereas a chemical reaction, by which the surface coating of electrically variable transmittance is prepared, is initiated during spraying in the acidic water vapour atmosphere during coating application, and hydrolysis and polymerization reactions of the alkoxide take place during spraying, and wherein the alkoxides form a matrix as a result of the hydrolysis and polymerization reactions.