Dic Corporation

Haruki Ohishi

Kazunori Maruyama

Tsuyoshi Sasaki

Yoshinori Iwashita

Shinji Ogawa

Kazuki Kurisawa

Kunihiko Kotani

Yasuo Umezu

Hidenari Akiyama

Shirou Taniguchi

Kenzo Takeishi

There are provided a liquid crystal composition containing one or two or more compounds represented by general formula (L) and three or four or more dichroic dyes selected from azo compounds, and a guest-host liquid crystal display device or light-controlling device that uses the liquid crystal composition. The liquid crystal composition according to the present invention contains dichroic dyes that satisfy high contrast, high solubility, high nematic-isotropic transition temperature (T), and low birefringent anisotropy (&#x394;n) effective for high light resistance and high thermal resistance at the same time. The use of the liquid crystal composition according to the present invention provides a liquid crystal display device or a light-controlling device that exhibits a good-looking black color and has high contrast, high display quality, and high practicality.

Liquid crystal composition and liquid crystal display device

An object of the present invention is to provide a composition that realizes high &#x394;n, has a wide liquid crystal phase temperature range, small viscosity, excellent low-temperature solubility, and high resistivity and voltage holding ratio, and is stable against heat and light, and to provide a liquid crystal composition having an excellent lens effect and excellent chemical stability using the composition, and a liquid crystal display device and a liquid crystal lens that use the liquid crystal composition. The present invention provides a liquid crystal composition that contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii), a liquid crystal display device using the liquid crystal composition, a liquid crystal lens using the liquid crystal composition, and a birefringence lens for stereoscopic image display using the liquid crystal composition.

Liquid crystal composition and liquid crystal display device using the same

A composition having a high &#x394;n, a wide temperature range of a liquid crystal phase, low viscosity, good solubility at a low temperature, high resistivity, a high voltage holding ratio, and stability against heat and light; a liquid crystal composition containing the composition, the liquid crystal composition having a good lens effect and good chemical stability; a liquid crystal display device including the liquid crystal composition; and a liquid crystal lens including the liquid crystal composition. The liquid crystal composition contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii).

The liquid crystal display element uses a liquid crystal composition which has a negative value of dielectric anisotropy (&#x394;&#x3b5;) and is designed to improve light transmittance adjusting an elastic constant, and a liquid crystal display including the liquid crystal display element. The liquid crystal display element uses a liquid crystal composition having a dielectric anisotropy (&#x394;&#x3b5;) of less than &#x2212;1.5, in which a value of &#x393; of the liquid crystal composition is 0.3 or less, and the value of &#x393; is obtained from Equation (2) using measured values of a splay elastic constant (K) and a bend elastic constant (K) of the liquid crystal composition and a twist elastic constant (K) value obtained from Equation (1) using measured values of a threshold voltage (Vth), a bend elastic constant (K), vacuum permittivity (&#x3b5;), a cell gap (d), and a helical pitch (P). 

Liquid crystal display element and liquid crystal display

A liquid crystal composition in which deterioration of viscosity that is associated with an increase in &#x394;n and an increase in &#x394;&#x2208; is suppressed, and a liquid crystal display element having a markedly improved response speed by using the relevant liquid crystal composition. The liquid crystal composition has a large value of &#x394;n and negative &#x394;&#x2208;, and have large absolute values thereof. Also, the liquid crystal composition has low &#x3b7;, has excellent liquid crystal properties, and exhibits a liquid crystal phase that is stable in a wide temperature range. Furthermore, since the liquid crystal composition is chemically stable to heat, light, water and the like, the liquid crystal composition is capable of low voltage driving, and is practically useful and highly reliable.

Growing community of inventors

Kita-adachi-gun, Japan

Haruki Ohishi