Liquid Crystal Composition and Liquid Crystal Display Device
First Claim
1. A liquid crystal composition that has the nematic phase, comprising two components, wherein the first component is at least one optically active compound selected from the group of compounds represented by formula (1), and the second component is at least one compound selected from the group of compounds represented by formula (2):
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Abstract
Subject The subject is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, a high stability to heat and a short helical pitch, or that is suitably balanced regarding at least two of the characteristics. The subject is also to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life, a little light-leak and so forth.
Means for Solving the Subject The invention provides a liquid crystal composition that has the nematic phase, including a specific optically active compound as a first component and a specific four-ring compound having a high maximum temperature of the nematic phase as a second component, and optionally including a specific compound having a high maximum temperature or small viscosity as a third component and a specific compound having a positively large dielectric anisotropy as a fourth component, and provides a liquid crystal display device including this composition.
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Citations
18 Claims
- 1. A liquid crystal composition that has the nematic phase, comprising two components, wherein the first component is at least one optically active compound selected from the group of compounds represented by formula (1), and the second component is at least one compound selected from the group of compounds represented by formula (2):
Specification