Light valve using modified POSS compound

A light valve device being capable of electronically changing light transmittance, which has a sandwich structure comprising two transparent electroconductive substrate layers and a light control layer therebetween,

• wherein the light control layer comprises solid polymeric matrix;
• in the solid polymeric matrix, liquid droplets are dispersed, and inside the liquid droplets light control particles are embedded;
• and the solid polymeric matrix is formed by solidifying of a modified POSS compound under ultraviolet irradiation or heating,
• wherein the modified POSS compound is shown in Structure 1,
• POSS-(O—P)m (Structure 1)
• which is synthesized via hydroxyl condensation among component I, component II and component III;
• wherein the component I is a POSS monomer having at least one hydroxyl as shown in Structure 2;
• POSS-(OH)n (Structure 2)
• the component II is a crosslinkable dihydroxyl-terminated silicon-containing monomer or oligomer;
• the component III is a dihydroxyl-terminated silicon-containing non-crosslinkable monomer or oligomer;
• P is a linear chain formed by a number of the component II and a number of the component III, wherein the number of the component II is j, and the number of the component III is k;
• j is an integer from 1 to 20, k is an integer from 1 to 50, n is an integer from 1 to 12, and m is an integer from 1 to 12;
• the component I has a structure selected from the group consisting of Structure 3, Structure 4, Structure 5 and Structure 6,
• wherein R1 to R8 are substituents independently selected from halogen atoms, saturated or unsaturated hydrocarbons, and at least one of R1 to R8 is a hydroxyl;
• wherein R1 to R7 are substituents independently selected from hydroxyl, halogen atoms, saturated or unsaturated hydrocarbons;
• wherein R1 to R8 are substituents independently selected from hydroxyl, halogen atoms, saturated or unsaturated hydrocarbons;
• wherein R1 to R8 are substituents independently selected from hydroxyl, halogen atoms, saturated or unsaturated hydrocarbons.