Ricoh Company, Ltd.

Other

Japan Science and Technology Agency

Ricoh Elemex Corporation

Ricoh Seiki Company, Ltd.

Yoshinobu Nakayama

Takumi Yamaga

Shigeyoshi Misawa

Masaomi Sasaki

Takashi Okada

Shinichi Kawamura

Toshiya Sagisaka

Hiroyoshi Funato

Masafumi Torii

Magane Aoki

Hidenori Tomono

Yoshikazu Akiyama

Tami Isobe

Kiyoshi Yokomori

Hitoshi Kondoh

Syunsuke Fujita

Takahiro Imai

Ikue Kawashima

Hiroyuki Horiguchi

Motonobu Kourogi

Widiyatmoko Bambang

Osamu Nakamoto

A transformer Treceives a sinusoidal signal on the primary side. The transformer Tis provided with a terminal, a terminal, and a center tapon the secondary side. The center tapis connected to the anode of a diode D. The cathode of the diode Dis connected to the cathode of a diode Dand one electrode of a capacitor C. The other electrode of the capacitor Cis connected to the anode of a diode Dand a connection point of the second electrode of a piezoelectric element Cand the first electrode of a piezoelectric element C. The second electrode of the piezoelectric element Cis connected to the terminal. The first electrode of the piezoelectric element Cis connected to the cathode of the diode D, the anode of the diode D, and the terminal

Piezoelectric element driving circuit

An off-current is reduced in an organic transistor, with which an organic transistor array is formed. A display apparatus is constructed using the organic transistor array. The organic transistor includes a substrate, a gate electrode, a separating electrode, a gate insulating film, a source electrode, a drain electrode, and an organic semiconductor layer. The organic transistor has a region in which the separating electrode and the organic semiconductor layer are laminated. A power supply is connected to the separating electrode.

Organic transistor, organic transistor array, and display apparatus

An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.

Aryl amine polymer, thin film transistor using the new aryl amine polymer, and method of manufacturing the thin film transistor

An optical frequency comb generator includes an oscillator () for oscillating modulating signals of a preset frequency, and an optical resonator () formed by an incident side reflecting mirror () and an outgoing side reflecting mirror (), arranged parallel to each other. The optical resonator causes resonation in light incident via the incident side reflecting mirror (). The optical frequency comb generator also includes an optical phase modulation unit () arranged between the incident side reflecting mirror () and the outgoing side reflecting mirror () for phase modulating the light, resonated by the optical resonator (), by the modulating signals supplied from the oscillator (), and for generating a plurality of sidebands centered about the frequency of the incident light at a frequency interval of the modulating signal. The outgoing side reflecting mirror () sets the transmittance from one frequency to another responsive to the light intensity of the generated sidebands.

Optical frequency comb generator

Aryl amine polymer, thin film transistor using the aryl amine polymer, and method of manufacturing the thin film transistor

A thermally-sensitive type flow meter measures a flow rate with a high accuracy by eliminating a noise generated in a source voltage. The flow meter includes a sensor chip comprising a substrate carrying sensing elements. First and second resistors are provided on first and second bridges formed over a depression formed on the substrate. The first bridge is positioned on an upstream side and the second bridge is positioned on a downstream side. The first and second resistors generate a heat by the same voltage source. First and second temperature measuring resistors are provided adjacent to the first and second resistors, respectively, to measure a temperature of the first and second resistors. Third and fourth temperature measuring resistors are provided for measuring the temperature of the fluid. A temperature control unit, including the first, second, third and fourth temperature measuring resistors, controls a temperature of each of the first and second resistors to be constant. A flow rate of the fluid is determined based on a voltage difference between a first voltage applied to the first resistor and a second voltage applied to the second resistor.

Thermally-sensitive type flow meter having a high accuracy

A magneto-optical signal detection device comprising a thin film type optical waveguide unit having a substrate on which a waveguide is formed. The unit has a coupling portion for coupling two polarization components simultaneously in a same plane of the waveguide as a TE mode and a TM mode. The modes TE and TM are included in reflection light reflected from a magneto-optical recording medium and perpendicular to each other. The unit also has a TE-TM mode separating portion having a taper boundary. A waveguide layer is gradually thinned in the taper boundary toward an outer end thereof.

Mode splitter and magneto-optical signal detection device

A high efficiency prism coupling device that comprises a substrate, an optical waveguide layer disposed on the substrate, a gap adjuster layer disposed on the waveguide layer and a prism secured to the gap adjuster layer through a dielectric adhesive agent. The gap adjuster layer has a refractive index which is lower than that of the waveguide layer. The gap adjuster layer has a recess formed therein for guiding an incident beam to the waveguide layer through a bottom portion thereof. The adhesive agent is disposed in and around the recess and has a refractive index which is higher than that of the waveguide layer. The prism is made from a dielectric material and disposed above the recess of the gap adjuster layer through the adhesive agent. The prism has a refractive index which is higher than that of the waveguide layer. The incident beam is introduced from outside through the prism, the adhesive agent and the bottom portion of the recess to the waveguide layer.

High efficiency prism coupling device and method for producing the same

Growing community of inventors

Tokyo, Japan

Yoshinobu Nakayama