Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Sagami Chemical Research Center

Kawamura Institute of Chemical Research

Dic Corporation (tokyo)

Other

Nemoptic

Takeshi Kuriyama

Shotaro Kawakami

Jouji Kawamura

Yoshinori Iwashita

Shinji Ogawa

Shinichi Hirata

Kazuki Kurisawa

Katsunori Shimada

Sadao Takehara

Masashi Osawa

Seiji Funakura

Toru Fujisawa

Kayoko Nakamura

Haruyoshi Takatsu

Joji Kawamura

Tadao Shoji

Kiyofumi Takeuchi

Go Sudo

Tamejiro Hiyama

Hiroyuki Ohnishi

Hiroshi Ogawa

Junichiro Koike

Hiroshi Maki

Masami Shishikura

Ryosuke Asami

Akiko Nakayama

Tetsuo Kusumoto

Yasuhiro Kuwana

Ivan N Dozov

Hidetoshi Nakata

Mika Yamamoto

Akira Kimura

Daniel Stoenescu

Isao Oshiumi

Jean-Claude Dubois

Hyobok Cha

Kiyoharu Nishide

Kusumoto, Tetsuo

Syoutaro Kawakami

Ivan Dozov

A liquid crystal composition having negative dielectric anisotropy, large refractive index anisotropy, and low viscosity and containing as a first component, one or two or more compounds represented by general formula (I) and, as a second component, one or two or more compounds represented by general formula (II), wherein dielectric anisotropy (&#x394;&#x3b5;) at 25&#xb0; C. is &#x2212;2.0 or less. Also, a liquid crystal display device having high contrast, fast response, and excellent display quality without causing image sticking and display defects.

Nematic liquid crystal composition and liquid crystal display device using same

A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.

Liquid crystal composition containing polymerizable compound and liquid crystal display element using the same

A liquid crystal display device with few drop marks left during manufacture is provided without degrading the image-sticking characteristics of the liquid crystal display device or other characteristics fundamental to liquid crystal display devices, such as dielectric anisotropy, viscosity, upper nematic phase temperature limit, and rotational viscosity (&#x3b3;), and a method for manufacturing such a liquid crystal display device is also provided. A liquid crystal display deviceaccording to the present invention includes a first substrate, a second substrate, a liquid crystal composition layerdisposed therebetween, and vertical alignment layersandcontaining a polymer of a monofunctional reactive-group-containing polymerizable compound and a polyfunctional reactive-group-containing polymerizable compound.

Liquid crystal display device and method for manufacturing the same

Liquid crystal composition containing polymerizable compound and liquid crystal display element using same

The present invention provides a liquid crystal display device that is free from a reduction in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and that enables problems of defective display, such as white spots, uneven alignment, and image-sticking, to be eliminated. In particular, the present invention provides a liquid crystal display device in which a liquid crystal composition containing a liquid crystal compound having a specific structure is used in the liquid crystal layer and in which an optically anisotropic body formed through polymerization of a polymerizable liquid crystal composition containing a specific amount of a polymerizable liquid crystal compound having a specific structure is used as an in-cell retardation layer.

Liquid crystal display device

A liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and that resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display has features of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking. Therefore, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices of, for example, liquid crystal televisions, monitors, cellular phones, and smart phones.

The present invention provides a liquid crystal composition having negative dielectric anisotropy, large refractive index anisotropy, and low viscosity and containing as a first component, one or two or more compounds represented by general formula (I) and, as a second component, one or two or more compounds represented by general formula (II), wherein dielectric anisotropy (&#x394;&#x2208;) at 25&#xb0; C. is &#x2212;2.0 or less. Also, provided is a liquid crystal display device having high contrast, fast response, and excellent display quality without causing image sticking and display defects.

A liquid crystal composition of the present invention is used for a liquid crystal display device of an active matrix driving method, which requires fast response. The liquid crystal composition has negative dielectric anisotropy and a large absolute value thereof, and low viscosity. The liquid crystal composition is chemically stable to heat, light, water, and the like, and is suitable as a liquid crystal composition capable of low-voltage driving and practicable and having high reliability. A liquid crystal display device using the liquid crystal composition can be preferably used for a liquid crystal display device of a VA mode, a PASV mode, a PSA mode, or the like.

Nematic liquid crystal composition and liquid crystal display element using same

Provided are a liquid crystal display device that suppresses occurrence of drop marks during production without degrading various properties, such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, rotational viscosity (&#x3b3;), and ghosting property, and a method for producing the liquid crystal display device. A liquid crystal display deviceof the present invention includes a liquid crystal composition layersandwiched between a first substrateand a second substrateand vertical alignment filmsandthat contain a polymer of a polymerizable compound having a polyimide skeleton as a main chain and a crosslinkable functional group as a side chain. The liquid crystal composition constituting the liquid crystal composition layercontains compounds represented by general formulae (I) and (II).

Liquid crystal display device and method for producing the same

There is provided a liquid crystal display device that may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby address issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display device according to the present invention, which may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby reduce the risk of faulty display such as burn-in, can be suitably used, in particular, as an IPS-mode or FFS-mode liquid crystal display device for active-matrix driving and may also be used as a liquid crystal display device for liquid crystal display televisions, monitors, mobile phones, smart phones, or the like.

The present invention provides a liquid crystal display device in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as white streaks, alignment unevenness, and image sticking are overcome. The liquid crystal display device of the present invention in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as image sticking are overcome is particularly useful for active matrix driving liquid crystal display devices with an IPS mode and an FFS mode and can be applied to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, and smart phones.

There is provided a liquid crystal display device that includes a liquid crystal composition and a color filter having a particular slope parameter that indicates the degree of aggregation of an organic pigment. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in a liquid crystal layer and suppressing display defects such as image sticking. Therefore, the liquid crystal display device is useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices.

The present invention provides a liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. Since a liquid crystal display device according to the present invention has a feature of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and suppressing the occurrence of display defects such as image sticking, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices such as liquid crystal televisions, monitors, cellular phones, and smart phones.

There is provided a nematic liquid crystal composition that exhibits a negative dielectric anisotropy (&#x394;&#x2208;), the liquid crystal composition being useful as a liquid crystal display material, and a liquid crystal display element using the same. The liquid crystal composition has a large absolute value of the dielectric anisotropy thereof and a low viscosity. The liquid crystal composition can provide a liquid crystal display element which has a high contrast, high-speed responsiveness, and good display quality in which image sticking and display defects are not generated. The liquid crystal display element using the liquid crystal composition is a useful display element which realizes both high-speed response and suppression of display defects. In particular, the liquid crystal display element is useful as a liquid crystal display element for active-matrix driving, and can be applied to, for example, a VA-type or PSVA-type liquid crystal display element.

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

The nematic liquid crystal composition exhibits a positive dielectric anisotropy (&#x394;&#x2208;), the liquid crystal composition being useful as a liquid crystal display material, and a liquid crystal display element using the same. The liquid crystal composition of the present invention has a large absolute value of dielectric anisotropy thereof and a low viscosity. By using this liquid crystal composition, it is possible to provide a liquid crystal display element which has a high contrast, high-speed responsiveness, and good display quality in which image sticking and display defects are not generated. The liquid crystal display element using the liquid crystal composition is a useful display element which realizes both high-speed response and suppression of display defects. In particular, the liquid crystal display element is useful as a liquid crystal display element for active-matrix driving, and can be applied to, for example, an IPS-type or TN-type liquid crystal display element.

Growing community of inventors

Kita-adachi-gun, Japan

Takeshi Kuriyama