Dainippon Ink and Chemicals, Incorporated

Honda Motor Co., Ltd.

Dainippon Mk & Chemicals Inc.

Hiroyuki Ohnishi

Haruyoshi Takatsu

Yuji Sasaki

Kiyofumi Takeuchi

Shinji Ogawa

Shotaro Kawakami

Takeshi Kuriyama

Go Sudo

Gerwald F Grahe

Hisato Sato

Sadao Takehara

Rainer Bruno Frings

Yutaka Fujita

Masayuki Tazume

Christine Fugger

Hidetaka Maki

Makoto Negishi

Masashi Osawa

Yoshikazu Oshima

Kiyohumi Takeuchi

Tomoyuki Noguchi

Daisuke Sato

Yutaka Nagashima

Jun Iida

Tatsuo Kawara

Kouji Okayasu

Cornelia Pithart

Masatoshi Endo

Naoe Katoh

A failure determination device capable of performing failure determination for a shutter device of a vehicle with accuracy in a short time period. In an engine room of a vehicle, a condenser for a refrigeration cycle for an aircon is provided and at a front grille of the vehicle, a grille shutter device is provided for introducing ambient air for cooling the condenser into the engine room by opening a grille shutter. According to the failure determination device of the shutter device, a pressure of the refrigerant discharged from the condenser is detected as a refrigerant pressure. A failure of the grille shutter device is determined based on the refrigerant pressure, which changes at a large rate according to the opening/closing of the grille shutter, enabling failure determination with accuracy in a short time period.

Failure determination device for shutter device of vehicle

A novel compound represented by the general formula (I), and a nematic liquid crystal composition incorporating the same. A compound represented by the general formula (I) can be produced industrially extremely easily, as shown in the examples, displays superior compatibility with current general purpose host liquid crystals as a nematic phase, and also shows little crystal precipitation at low temperatures. Moreover, by addition of a small amount of such a compound to a host liquid crystal, the liquid crystal temperature range at low temperatures can be effectively widened without any significant worsening of the various characteristics of the liquid crystal material. Consequently, a compound of the present invention is an extremely useful liquid crystal material which is suitable for various liquid crystal display elements which require a broad operating temperature range.

Fused ring compound

The present invention discloses a decahydronaphthalene derivative represented by general formula (I):a liquid crystal composition in which it is contained, and a liquid crystal device in which it is used. The novel decahydronaphthalene derivative of the present invention can be produced industrially extremely easily as shown in the examples, and by adding a small amount to a base liquid crystal, it is possible to have effects that expand the nematic phase temperature range, thereby improving its various characteristics as a nematic liquid crystal. Moreover, the novel decahydronaphthalene derivative of the present invention also has superior co-solubility with base liquid crystals generally used at present. Thus, it is suitable for various types of liquid crystal devices requiring a wide operating temperature range, and is extremely useful as a liquid crystal material.

Decahydronaphthalene derivative

Liquid crystal display

Liquid crystal composition

A 1,2-di[trans(equatorial-equatorial)cyclohexyl]-ethane derivative of the following general formula ##STR1## wherein R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms.

Dicyclohexylethane derivatives

A 1-cyclohexyl-2-cyclohexylphenylethane derivative of the following general formula ##STR1## wherein R.sub.1 and R.sub.2, independently from each other, represent a linear alkyl group having 1 to 7 carbon atoms.

1-Cyclohexyl-2-cyclohexylphenylethane derivatives

Growing community of inventors

Saitama, Japan

Hiroyuki Ohnishi