Liquid crystal mixture and light modulating device using the same

A liquid crystal mixture applied in light modulating devices, comprising:

• (a) at least two compounds selected from the group consisting of compounds of formulas I-1 to I-8, and I-10
• (b) at least one compound selected from the group consisting of compounds of formula II
• (c) at least one compound selected from the group consisting of compounds of formula III
• and
• (d) at least one chiral compound consisting of:
• wherein
• H1, H2, H3, H4 and H5 each independently denote a ring structure selected from the group of
• where one or more H atoms may be independently substituted by halogen, a alkyl group with 1-10 C atoms or a ester group,
• B1 and B2 each independently denote —COO—, —OCO—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —C≡C—, —CH═CH—, —CF2CF2—, —CF═CF—, a single bond or —(CH2)a— where a is a even number between 2-10,
• A1, A2, A3 and A4 each independently denote —CN, —F, —Cl, —NCS, —OCF3, —CF3 or a chain alkyl group with 1-25 C atoms where one or more nonadjacent —CH2— may be independently replaced by —O—, —S—, —NH—, —N(CH3)—, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —COS—, —CH═CH—, —CH═CF—, —CF═CF— or —C≡C—,
• k is 1, 2, 3 or 4, m is 0, 1 or 2, n is 1, 2 or 3, o is 1 or 2, and m+n+o is no more than 5, and the at least two compounds of formulas I-1 to I-8, and I-10 is 1%-34% by weight of the liquid crystal mixture.