Sharp Kabushiki Kaisha Corporation

Agency of Industrial Science and Technology

Agency of Industrial Science and Technology Ministry of International

Kogyo Gijutsuin

Other

Ministry of International Trade & Industry

Shoei Kataoka

Shuhei Tsuchimoto

Nobuo Hashizume

Hideo Nojima

Hiroshi Tateno

Yasuo Komamiya

Ryusuke Kita

Hidetaka Shintaku

Eizo Ohno

Mitsuo Kawashima

Susumu Saitoh

Masaru Yoshida

Yasuhiko Inami

Yoshinobu Sugiyama

Masaya Hijikigawa

Shigeo Nakajima

Masaya Nagata

Hideo Yamada

Hiroyuki Fujisada

Kazutaka Tomizawa

Masayoshi Koba

Yoshikazu Yoshimoto

Shigeki Sakai

Takashi Sugihara

Shinji Toyoyama

Hiroki Tabuchi

Kazutaka Uda

Kimihiro Ohta

Nobuyuki Tanaka

Teruyuki Kataoka

Hiroshi Kodera

Morisue Mititada

Masaya Hijikihigawa

Hiroya Sato

Toshio Tsurushima

Hisao Tanoue

Yasuo Komaniya

Light from an LED (light-emitting diodes) has strong directional characteristics; therefore, lighting over large area, as well as control of the quality or the distribution of lighting was impossible. Placing a liquid-crystal panel in front of an LED (light-emitting diodes) enables to control light from the LED and the quality or the distribution of lighting.

LED lighting apparatus emitting controlled spatial illumination light

There is provided a small and lightweight Fabry-Perot type optical tuner. By changing the distance between the reflector plates A and B with an applied voltage across said reflector plates A and B, wherein said reflector plates A, B are supported with coil springs A, B, and at the same time by changing the refractive index of the liquid crystal material , i.e. by utilizing both changes of distance d and refractive index n, an optical tuning can be obtained over a wide range of optical wavelength.

Optical wavelength tuning method and Fabry-Perot type optical tuner

A superconducting apparatus has a superconducting element, which is a member to be cooled and which exhibits a superconducting phenomenon; an electronic cooling element composed of a cooling electrode provided to the superconducting element via an insulating layer, p-type and n-type semiconductor layers formed to be connected to the cooling electrode, heat-radiation electrodes provided to the semiconductor layers independently of each other, and a heat-radiation plate provided to the heat-radiation electrodes via the insulating layer; lead wires for electrically connecting the superconducting element and the electronic cooling element to external circuits, respectively. The superconducting element and the electronic cooling element, which are integrally packaged, are installed within the first container. Internally sealed by an inert gas atmosphere, the first container is installed within the second container. The second container is internally sealed in a vacuum state.

Superconducting apparatus having dew-preventable Peltier-effect element

A thermoelectric material is provided which consists of an oxide with a perovskite structure, wherein the oxide is of the formula (Ln.sub.1-x A.sub.x).sub.2 MO.sub.4 with 0.01.ltoreq.x.ltoreq.0.05, where Ln is a rare earth element, A is an alkali earth metal element, and M is a transition metal element. The thermoelectric material is particularly useful for Peltier cooling elements to produce low temperatures below room temperature.

Thermoelectric material

A logic circuit device includes a superconductive body formed of a ceramic superconductive material. The ceramic superconductive material has random grain boundaries which act as weak couplings. The ceramic superconductive material also has a magneto-resistive property. There is at least one conductor arranged near the ceramic superconductive body in order to exert a magnetic field on the ceramic superconductive body. The ceramic superconductive body changes its resistance in response to the magnetic field generated by the conductor. The ceramic superconductive body can be used as part of a logic circuit.

Superconductive logic device

A superconductinve magneto-resistive device for use in a sensor system for sensing an external magnetic field which is formed so as to have a predetermined pattern for a current path through which a supplied current flows. The pattern includes portions formed close and parallel to each other so that magnetic fields induced by respective currents flowing through the portions can be cancelled with each other.

Superconductive magnetic sensor having self induced magnetic biasing

A superconductive apparatus including a superconductive member to be cooled, a cooling element which exhibits Peltier effect upon supply of electric power thereto such that the superconductive member is thermally coupled with a cooling portion of the cooling element and a container for accommodating the superconductive member and the cooling portion.

Cooling apparatus for superconducting devices using Peltier effect

A sensor device comprising a substrate and a sensor formed on thereof which is made of a metal, metallic oxide, semiconductor, dielectric or organic material, the sensor having projections or indentations formed on or in its surface with optional predetermined shape and dimensions; which is useful as a chemical sensor, biosensor or physical sensor device of improved performance and function.

Sensor device

A superconductive apparatus has a superconductive device such as a superconductive magneto-resistive device. The superconductive device is mounted within an airtight package which is sealed to create an airtight state. Before sealing, the airtight package is evacuated to replace the internal air thereof with an inert gas.

Superconductive apparatus having a superconductive device in a airtight

An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase, and a magnetic field is applied thereto. A current is supplied to the superconductor, and there are clearly observed a phenomenon on which an electric resistance thereof becomes zero at a threshold temperature thereof, a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold current to be supplied thereto, and a phenomenon on which the super conductor changes from the normal conductive phase to the superconductive phase at a threshold magnetic field to be applied thereto.

Apparatus for observing a superconductive phenomenon in a superconductor

An apparatus for magnetic measurement using superconductive magneto-resistive film which is disposed in a magnetic field with the surface of the superconductive magneto-resistive film directed in parallel with the direction of the magnetic field so that the magnetic hysterisis property of the film can be avoided and the accuracy of the measurement can be much improved.

Method of eliminating the effect of hysteresis in a superconductive

A superconductive magneto-resistive device for use in a sensor system for sensing an external magnetic field which is formed so as to have a predetermined pattern for a current path through which a supplied current flows. The pattern includes portions formed close and parallel to each other so that magnetic fields induced by respective currents flowing through the portions can be cancelled with each other.

Superconductive magneto-resistive device for sensing an external

An apparatus for observing a superconductive phenomenon is disclosed. In the apparatus, a cooling unit cools a superconductor having a threshold temperature at which the superconductor changes from the normal conductive phase to the superconductive phase, and a magnetic field is applied thereto. A current is supplied to the superconductor, and there are clearly observed a phenomenon on which an electric resistance thereof becomes zero at a threshold temperature thereof, a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold current to be supplied thereto, and a phenomenon on which the superconductor changes from the normal conductive phase to the superconductive phase at a threshold magnetic field to be applied thereto.

A ceramic superconductive magneto-resistive element which has weak grain boundaries is highly sensitive to weak magnetic fields. The magnetic field is measured by the use of an electronic circuit. A comparator is used for comparing an output and reference voltage of the element. When there is a difference between the output and reference voltage bias current is used to equalize these voltages.

Superconductive magneto resistive apparatus for measuring weak magnetic

A sensor having a pair of sensor units, one of which is a detecting sensor unit and the other of which is a reference sensor unit, wherein each of the units comprises a substrate with a hollow portion, a thin insulating layer with a bridge, cantilever or diaphragm shape disposed on the substrate, a sensitive film disposed on the bridge, cantilever or diaphragm portion of the thin insulating layer, and a pair of electrodes being in contact with the sensitive film, the sensitive film section of the detecting sensor unit being exposed to an atmosphere to be measured so that the electrical resistance of the sensitive film changes with a variation in the physical quantity of the atmosphere to be detected, and the sensitive film section of the reference sensor unit being sealed within a shielding container so that the electrical resistance of the sensitive film is not influenced by a variation in the physical quantity of the atmosphere outside of the container, whereby the absolute physical quantity of the atmosphere to be detected is determined by the output power of the sensor based on a difference between the electrical resistance of the detecting sensor unit and the electrical resistance of the reference sensor unit.

Growing community of inventors

Tokyo, Japan

Shoei Kataoka