| abstract |
At least one or at least two suitable balance elements in terms of characteristics such as a high upper temperature limit on a nematic phase, a lower lower limit temperature on a nematic phase, a lower viscosity, a proper optical anisotropy, a large dielectric anisotropy, a large specific resistance, And provides an AM device having a short response time, a large voltage holding ratio, a large contrast ratio, a long lifetime, and the like. A specific bicyclic compound having a large optical anisotropy and a large dielectric anisotropy as a first component, a specific tri-cyclic compound having a large upper limit temperature and a large dielectric anisotropy as a second component, a compound having a large optical anisotropy and a large dielectric anisotropy as a third component A specific tri-cyclic compound, and a specific bicyclic compound having a small viscosity as a fourth component. Further, a liquid crystal display element containing this composition is used. |