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

07976913

ABSTRACT:
The subject is to provide 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 that is suitably balanced regarding at least the two characteristics. It is to provide 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.The invention provides a nematic liquid crystal composition that include a specific optically active compound as a first component and a specific compound having a positively large dielectric anisotropy as a second component, and that may include a specific compound having a high maximum temperature or a small viscosity as a third component, and a specific compound having a small minimum temperature and a positively large dielectric anisotropy as a fourth component, and provides a liquid crystal display device including this composition.

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patent: 5439613 (1995-08-01), Takeshita et al.
patent: 7435457 (2008-10-01), Goto et al.
patent: 02-233626 (1990-09-01), None
patent: 06-200251 (1994-07-01), None
patent: 10-251186 (1998-09-01), None

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