Patent ID: 10633589

Abstract:
Provided are a liquid-crystal-medium having stability to heat, light and so forth, a wide liquid-crystal-phase temperature-range and significantly large dielectric-anisotropy and developing an optically isotropic liquid-crystal-phase; and various optical-devices used in a wide temperature-range, having short response-time, a large contrast-ratio and low drive-voltage and suppressing decrease in an effective dielectric-constant in a high-frequency range.A Liquid-crystal composition contains achiral-component T containing at least one compound selected from a first component represented by formula (1) and at least one compound selected from a second component represented by formula (2) or (3) and a chiral-agent to develop optically-isotropic liquid-crystal-phase: In formula (1), R1: alkyl, ring A1: 1,4-cyclohexylene, ring B1: 1,4-phenylene, L11 to L14: fluorine, Y1: fluorine, n1: 1 or 2, R2: alkyl, Z21 and Z22: single-bond or —CF2O—, L21 to L23: fluorine, Y2: fluorine, R3: alkyl, Z31 and Z32: single-bond or —CF2O—, L31 to L34: fluorine, Y3: fluorine, for example.