Patent ID: 9638979
Date: 2017-05-02
CPC Classifications: G02F,Y10T

Claim:
1. A light control film, comprising: two transparent electroconductive substrates; and a light control layer sandwiched between the two transparent electroconductive substrates, wherein the light control layer contains a resin matrix and a light control suspension dispersed in the resin matrix as droplets having light control performance, where the light control suspension comprises a liquid dispersing medium and light control particles having a major axis and a minor axis dispersed in the liquid dispersing medium, where a concentration of the light control suspension, measured by observing a cross section in a thickness direction of the light control film when trisecting the light control layer into three equal thickness parts consisting of a vicinity region to each of the transparent electroconductive substrates, and a middle region of the light control layer to observe the existence of droplets of the light control suspension in each of the regions, in the vicinity region to each of the transparent electroconductive substrates is smaller than that of the light control suspension in the middle region in the thickness direction of the light control layer, and the light control particles are configured to have their major axes arranged in a direction parallel to an electric field when an electric field is applied, whereby light radiated into the light control film penetrates through the light control film, wherein the light control layer contains the resin matrix as an energy cured polymeric medium from each of both major surfaces, where the polymeric medium has a first major surface adjacent one of the two transparent electroconductive substrates and a second major surface adjacent another of the two transparent electroconductive substrates with the light control suspension dispersed in the polymeric medium as droplets, so that for the resin matrix the concentration of the light control suspension in the vicinity region to each of the transparent electroconductive substrates is smaller than that of the light control suspension in the middle region in the thickness direction of the light control layer for color evenness and adhesion with the two transparent electro-conductive substrates.