Patent Number: 7,709,066

Title: Liquid crystal composition and liquid crystal display device

Abstract: A liquid crystal composition is provided that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition contains a specific tricyclic compound having a large optical anisotropy as the first component and a specific tetracyclic compound having a large dielectric anisotropy as the second component, and may contain a specific bicyclic compound having a particularly small viscosity as the third component. The liquid crystal composition has a nematic phase. The liquid crystal display device contains the liquid crystal composition.

Inventors: Matsumura; Yoshinari (Chiba, JP), Saito; Masayuki (Chiba, JP)

Assignee: Chisso Corporation

International Classification: C09K 19/12 (20060101); C09K 19/30 (20060101); C09K 19/34 (20060101)

Expiration Date: 5/04/12018