Intelligent window

An intelligent window, comprising:

• two substrates each electrically connected to a voltage source, wherein a switchable electric field is formed between the two substrates;
• and
• a dimming layer formed by filling a liquid crystal material between the two substrates, wherein the liquid crystal material is formed by mixing a chiral molecule, a dichroic dye, and a salt ion in a nematic liquid crystal, and a weight percentage concentration of the chiral molecule in the liquid crystal material is determined according to a limitation formula
• n
• 4
• ⁢
• pm
• 1
• ≤
• C
• ≤
• m
• 2
• Dp
• ,
• wherein C is the weight percentage concentration, n is a birefringence index of the liquid crystal material, p is a chiral force of the chiral molecule in micrometer−1, D is a thickness of the dimming layer in micrometer, m1 is a constant of multiaxial absorption condition in micrometer, and m2 is a constant of normally transparent condition;
• wherein based on applying the weight percentage concentration of the chiral molecule in the liquid crystal material determined by said limitation formula, different voltages generate different chiral forces acting on the liquid crystal material to have different arrangements rendering the dimming layer switchable among a transparent state, an absorption state and a scattering state;
• wherein in the transparent state, liquid crystal molecules of the liquid crystal material are in a continuous arrangement perpendicular to the two substrates from top to bottom;
• wherein in the absorption state, the liquid crystal molecules of the liquid crystal material are in a super twisted orientation, and the liquid crystal material absorbs incident light in different polarization directions;
• and
• wherein in the scattering state, the liquid crystal molecules of the liquid crystal material are interfered by the salt ion and are in a discontinuous and chaotic arrangement, the incident light is dispersed in the dimming layer.