Dic Corporation

Tomoaki Hara

Shotaro Kawakami

Go Sudo

Shinichi Hirata

Yasuo Umezu

Junko Yamamoto

Wei Wu

Hyobok Cha

Naomi Hatano

Yasuo Umetsu

The present application provides a liquid crystal composition with high dielectric constant anisotropy and a low viscosity, and to provide a liquid crystal display device with high contrast, high-speed responsivity, high light fastness, and high display quality without image sticking and display defects. The liquid crystal composition contains one or two or more compounds represented by the general formula (I). The liquid crystal composition is of great practical use as a liquid crystal composition for use in liquid crystal displays and is effective for high contrast, high-speed response, and high quality reliability. 

Liquid crystal composition and liquid crystal display device including the same

There is provided a liquid crystal composition having the following properties without reductions in refractive index anisotropy (&#x394;n) and nematic phase-isotropic liquid phase transition temperature (T): sufficiently small viscosity (&#x3b7;), sufficiently small rotational viscosity (&#x3b3;1), a large elastic constant (K), and negative dielectric anisotropy (&#x394;&#x3b5;) with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type in which such a liquid crystal composition is used and which has a high response speed and excellent display quality with defective display being eliminated or reduced. The liquid crystal display device using the liquid crystal composition of the present invention is useful as an active-matrix liquid crystal display device and can be used in liquid crystal display devices of, for instance, a VA mode and PSVA mode.

Nematic liquid crystal composition and liquid crystal display device using the same

The present invention relates to a PSA-mode liquid crystal display device including a polymer produced by polymerizing a polymerizable compound by energy ray irradiation in a state in which a mixture of the polymerizable compound and a liquid crystal composition is held between the first substrate and the second substrate, the polymer having a number-average molecular weight of 50,000 or more in terms of polystyrene. In a PSA-mode display device in which alignment of liquid crystal molecules substantially vertically aligned between the substrates is controlled by applying a voltage, a pre-tilt angle can be properly given without being inhibited. Therefore, the present invention provides a PSA-mode display device with good alignment stability, uniform alignment within the substrates, and no or suppressed display defects and a method for producing the same.

Liquid crystal display element

Growing community of inventors

Kita-adachi-gun, Japan

Tomoaki Hara