Patent ID: 7771799

Claim:
A liquid crystal device element comprising: a pair of parallel substrates; conductive layers provided respectively on facing inner surfaces of these substrates; liquid crystal alignment layers provided respectively with pre-tilt angle on facing inner surfaces of these conductive layers, and a liquid crystal layer formed in between these pair of liquid crystal alignment layers, wherein the liquid crystal layer has liquid crystal-soluble particles dissolved or dispersed in a matrix liquid crystal, wherein each of the liquid crystal-soluble particles comprises a core having a diameter smaller than 100 nm and comprising one or a plurality of nanoparticles, and a protective layer comprising liquid crystal molecules or liquid crystal-like molecules provided on a periphery of the core, wherein a control circuit of applying voltage, while modulating at least frequency among frequency and voltage, is provided on the conductive layer for varying light transmittance of the liquid crystal layer, and wherein the matrix liquid crystal, in which the liquid crystal-soluble particles are dissolved or dispersed, shows an electro-optical response such that a voltage at which the matrix liquid crystal starts its response changes depending on a frequency of applied electric field, wherein under a constant applied voltage, an electro-optical response is turned on by switching the frequency of applied electric field from low frequency to high frequency, and the electro-optical response is turned off by switching the frequency from high frequency to low frequency, and wherein a frequency modulation range of the electro-optical response can be changed freely from 20 Hz to 100 kHz.