Liquid crystal composition and liquid crystal display device

Details Liquid crystal composition and liquid crystal display device Liquid crystal composition and liquid crystal display device

2011-07-12

2011-07-12

Wu, Shean C (Department: 1722)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299010, C252S299610, C252S299630, C252S299660, C252S299670

Reexamination Certificate

active

07976912

ABSTRACT:
The invention provides a liquid crystal composition 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 provides a liquid crystal composition that is properly balanced regarding at least two characteristics. The invention provides an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth.A liquid crystal composition having a nematic phase, wherein the first component may contain a specific optical active compound, the second component may contain a specific compound having a small minimum temperature and a large optical anisotropy, the third component may contain a specific compound having a large maximum temperature or a small viscosity, and the fourth component may contain a specific compound having a small minimum temperature, and positively large dielectric anisotropy. The liquid crystal display device contains the liquid crystal composition.

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