Citizen Watch Company, Ltd.

Yumiko Sakamaki

Tomijiro Naito

Shigeru Watanabe

Kikuo Yamamoto

Katsuji Niino

Hisato Sato

Atsushi Murakami

Toshiro Yukinari

A thermoelectric power generating timepiece () comprises a dial (), a movement (), and a heat conduction sheet (), provided within an enclosed space, defined by a case () made of metal, with a glass () fixedly attached thereto, and a case back (), and further comprises a thermoelectric element (), housed in a gap between the heat conduction sheet () and the case back (). The case backis made of two kinds of materials each having a thermal conductivity differing from that of the other. The case back () is made up of a heat conducting part () made of material, such as metal, and the like, having a high thermal conductivity, and formed in a shape larger in outer size than the thermoelectric element (), so as to be disposed opposite to the thermoelectric element (), and a heat insulating part () made of material having a low thermal conductivity such as plastics, and the like, and formed so as to be disposed on the outside of the heat conducting part ().

Thermal power generating timepiece and rear cover for thermal power generating timepiece

A plurality of n-type bar-shaped devices (,) consisting of an n-type thermoelectric semiconductor and a plurality of p-type bar-shaped devices (,) consisting of a p-type thermoelectric semiconductor are regularly disposed or fixed through an insulating layer (,) to form a thermoelectric device block (,). End portions of the n-type bar shaped device (,) and the p-type bar-shaped device (,) are connected with an interconnection conductor (,) on an upper surface (,) and a lower surface (,), which will be interconnecting end faces of the thermoelectric device block (,), to form a plurality of thermocouples connected in series. In addition, a pair of terminal conductors (,) which is electrically connected with bar-shaped devices (,) at least on one end portion and the other end portion of the n-type and p-type bar-shaped devices (,) connected in series is formed on end face (,) excluding the upper surface (,) and the lower surface (,) which will be an interconnecting end face of the thermoelectric device block (,), and a lead wire is connected to the terminal conductors (,).

Thermoelectric device and method of fabricating the same

Thermoelectric element and method for manufacturing the same

A novel tolan compound of the formula (I):

Tolan compound and liquid crystal composition containing the same

A novel tolan compound of the formula (I): ##STR1## wherein A is C.sub.1-10 alkyl, C.sub.1-10 alkoxy, cyclohexyl substituted by C.sub.1-10 alkyl at 4 position, cyclohexyl substituted by C.sub.1-10 alkoxy group at 4 position or a group of the formula: ##STR2## wherein Y is hydrogen or halogen and Z is C.sub.1-10 alkyl or halogen; B is a single bond or --CO--O-- or --O--CO--; D is hydrogen, C.sub.1-10 alkyl, cyclohexyl substituted by C.sub.1-10 alkyl at 4 position; and Z represents a hydrogen atom or a halogen atom. The tolan compound can increase the N-I point, decrease the viscosity, and increase the double refractive index of a liquid crystal composition without affecting the viscosity and threshold voltage Vth, and is mutually soluble with various other liquid crystal compounds, so that the compound can be used as a constituent of a liquid crystal composition in combination with these other liquid crystal materials to improve the properties of the composition.

A novel tolan compound of the formula (I): ##STR1## wherein A is a substituted or unsubstituted cyclohexyl or phenyl group; B is --CO--O-- or --O--CO--; X is a hydrogen atom, a halogen atom, a cyano group, a C.sub.1 -C.sub.10 alkyl group, or a C.sub.1 -C.sub.10 alkoxy group; Y is a hydrogen atom or a halogen atom; and m and n are an integer of 0 or 1, provided that m+n=0 or 1. The tolan compound can raise the N-I point and increase the double refractive index (.DELTA.n) of liquid crystal compositions. The liquid crystal composition containing this tolan compound has excellent characteristics as a liquid crystal material, and the liquid crystal display device using this liquid crystal composition has a wide temperature range and a wide visible angle and can be operated at a low driving voltage.

Benzyl ether derivative and composition containing the same

An ester derivative represented by the following formula (I). ##STR1## In the formula, V, W, X, Y and Z represent a hydrogen atom or a halogen atom, respectively. The present invention also comprises a liquid crystal composition containing the ester derivative. The ester derivative can optimize the n value, lower the viscosity and reduce the threshold voltage Vth of the liquid crystal composition.

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Sayama, Japan

Yumiko Sakamaki