Oclaro Japan, Inc.

Mitsubishi Electric Corporation

Tdk Corporation

Hitachi, Ltd.

Lumentum Japan, Inc.

Kazuhiro Komatsu

Daisuke Noguchi

Takuma Ban

Fumitake Unezaki

Yasutaka Ochiai

Nobuto Morigasaki

Michihide Sasada

Tomohisa Fukuoka

Yuhta Matsunaga

Kosuke Tanaka

Takashi Sasaki

Makoto Saito

Takuya Ito

Kenichi Kasai

Shogo Tamaki

Junji Hori

Yuichiro Sueda

Mio Motodani

Takaya Yamamoto

Takeru Yoshida

Naohiko Baba

Toshiki Iino

Michiyuki Takagi

Fuyuki Sato

Hideaki Asakura

Shuhei Yoshikawa

Tomooki Ukiana

Toshihiro Mega

Yoshitaka Uno

Nobuaki Tasaki

Fumitoshi Goto

Yoshikuni Uchida

Yoichiro Igarashi

Kunio Kamata

Sosuke Minamida

Jin Kawasaki

Satoko Tomita

Hiromi Kaneko

Yoichiro Hoshi

Naoya Fukuoka

A refrigeration cycle apparatus includes a refrigeration cycle circuit, a bypass flow path, a first valve provided in the refrigeration cycle circuit, a second valve provided at the bypass flow path, a first temperature sensor configured to detect a temperature of an indoor space, a second temperature sensor configured to detect a temperature of refrigerant on a liquid side of an indoor heat exchanger, and a notification part. The refrigeration cycle apparatus is able to operate in an operation state where the compressor operates, the indoor heat exchanger functions as an evaporator, and the first valve is open while the second valve is closed. In the operation state, the notification part issues notification of an abnormality of an electronic expansion valve or the first valve when a temperature detected by the second temperature sensor is higher than an evaporation temperature of refrigerant in the refrigeration cycle circuit.

Refrigeration cycle apparatus

Including a data acquisition unit () that periodically acquires various measured temperatures of a liquid pipe (), a gas pipe (), and an intake port from an air conditioner controller (), an operating state determination unit () that determines an operating state of an indoor unit () on the basis of the acquired various measured temperatures, a blowing temperature estimation unit () that estimates a blowing temperature from the indoor unit on the basis of the acquired various measured temperatures and an estimation model set in accordance with the determined operating state, and a blowing temperature display unit () that displays an estimated value of the blowing temperature.

Air conditioner blowing temperature estimation apparatus and computer-readable recording medium

To provide an optical subassembly, an optical module, and an optical transmission equipment including simpler components. A first component with an optical semiconductor device mounted thereon that dissipates heat generated by the optical semiconductor device to outside, a second component in contact with the first component to form a box type housing, and a receptacle terminal that optically joined to the optical semiconductor device are provided, wherein the second component includes a window structure for transmitting light transmitted between the optical semiconductor device and the receptacle terminal, and the receptacle terminal is fused and fixed to the outside of the window structure.

Optical subassembly, optical module, and optical transmission equipment

Provided are an optical module and a transmission equipment in which a decrease in yield due to brazing or soldering is suppressed. Provided is an optical module including a semiconductor optical element, a stem, and a wiring substrate. The stem includes one or more lead terminals. The wiring substrate includes one or more openings through which the one or more lead terminals, respectively, pass. The stem has a placing surface on which the wiring substrate is placed, and two protrusion portions that are arranged on both external sides, respectively, of the wiring substrate. The wiring substrate further includes a ground conductor layer being positioned on a rear surface and two ground conductor patterns that are arranged on regions, respectively, that are in the vicinity of the two protrusion portions, of a front surface, and are electrically connected to the ground conductor layer.

Optical module and transmission equipment

An optical receiver module includes light-receiving elements each having a first electrode and a second electrode to which a bias is applied, and converting input optical signals into electric signals and outputting the electric signals from the first electrodes, and a carrier having wiring patterns respectively electrically connecting to the light-receiving elements and supporting the light-receiving elements. The wiring pattern includes a first wiring line electrically connecting to the first electrode and a second wiring line electrically connecting to the second electrode. The second wiring line has a high resistance portion having a higher resistance value than the other portions at least in a position overlapping with the light-receiving element to be connected and a low resistance portion having a lower resistance value than the high resistance portion at least in a position not overlapping with any of the light-receiving elements.

Optical receiver module and optical module

An optical module includes: a wiring substrate that has a wiring pattern including a connecting portion and is arranged on an optical subassembly so as to be electrically connected thereto; and a flexible insulating layer formed between the optical subassembly and the wiring substrate. The optical subassembly includes: a conductive stem that has a surface opposed to the wiring substrate, the conductive stem being shaped so that the surface has a through hole opened therein and being connected to a reference potential; and a signal lead for transmitting a signal, the signal lead passing through the through hole while being electrically insulated from the conductive stem. The signal lead passes through the flexible insulating layer to be joined to the connecting portion. The flexible insulating layer is in contact with the connecting portion, the signal lead, and the surface of the conductive stem.

Optical module

An optical receiver module includes a light receiving element that has a first electrode and a second electrode for receiving a bias and converts an optical signal inputted into an electrical signal to output the electrical signal via the first electrode. A signal line extends from the first electrode through the light receiving element-side signal pad and the second wire to the amplifier-side signal pad. A bias line extends from the second electrode through the light receiving element-side bias pad, the first wire, and the third wire to the first and second amplifier-side bias pads. The signal line three-dimensionally intersects with the bias line at an interval in a direction of the loop height of the first wire and that of the second wire.

A base material includes a pair of end regions located on both sides in a first direction, and an intermediate region located between the pair of end regions. The intermediate region includes a pair of side edges on both sides in a second direction orthogonal to the first direction. Both the pair of side edges do not project outward in the second direction from the pair of end regions. At least one of the pair of side edges has a shape recessed inward in the second direction from the pair of end regions. Terminals include end pads and a side pad. The end pads are located in each of the pair of end regions of the base material and arranged in the second direction. The side pad is located at at least one of the pair of side edges of the base material.

Optical module and flexible printed circuit board

A refrigeration cycle apparatus Including a refrigerant circuit configured to circulate refrigerant to a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger, the compressor being connected to the indoor heat exchanger by a gas extension pipe, the expansion valve being connected to the outdoor heat exchanger by a liquid extension pipe; pressure sensors and temperature sensors to detect an operating state amount of the refrigerant circuit; and a controller to execute refrigerant-leakage detection operation of detecting refrigerant leakage by calculating a refrigerant amount in the refrigerant circuit based on the operating state amount detected by the pressure sensors and the temperature sensors, and comparing the calculated refrigerant amount with a reference refrigerant amount. The controller controls a quality of the refrigerant at an outlet of the liquid extension pipe to be in a range from 0.1 to 0.7 in the refrigerant-leakage detection operation.

A plurality of leads include a pair of differential signal leads for inputting differential signals, and a power supply lead for supplying power. A wiring pattern includes a pair of differential transmission lines connected to the pair of differential signal leads, and a power supply wiring connected to the power supply lead. A wiring board includes a first region overlapping an optical subassembly, and a second region extending from the first region so as to protrude from the optical subassembly. The pair of differential signal leads are farther away from the second region than the power supply lead. The pair of differential transmission lines are close together so as to be electromagnetically coupled to each other. The optical subassembly does not include a lead penetrating the wiring board in a region between the pair of differential transmission lines.

An air-conditioning system control apparatus capable of, even for a room in which a humidity sensor is not installed, accurately estimating an indoor humidity and preventing an indoor temperature and humidity from deviating from comfortable ranges. The air-conditioning system control apparatus includes a thermal characteristic parameter setting unit configured to determine a thermal characteristic parameter of a building thermal model based on a heat equation, a humidity characteristic parameter setting unit configured to determine a humidity characteristic parameter of a building humidity model based on a moisture balance equation in an air-conditioned space, and a control data generation unit configured to generate control data of an air-conditioning apparatus so that a temperature and a humidity of the air-conditioned space are each within a preset range.

Air-conditioning system control apparatus

A flexible wiring board includes a conductive film provided on one surface of a substrate. The conductive film includes a plurality of pad portions to which a plurality of connection electrodes are respectively bonded with solder, and a wiring portion extending in a direction crossing a row in which the plurality of pad portions are arranged. The plurality of pad portions include a terminal portion electrically connected with the wiring portion, and at least two land portions located on both sides of the terminal portion while avoiding electrical connection to the wiring portion. The solder includes land solder portions respectively overlaid on the at least two land portions and a terminal solder portion overlaid on the terminal portion. The land solder portion has a shape extending longer than the terminal solder portion along a direction in which the wiring portion extends from the connection electrode corresponding thereto.

A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as r, a minimum particle size of the segregation particle is defined as r, and an average particle size of the dielectric particle having the core-shell structure is defined as r, a relation of r/r&#x2266;2.00 and r/r&#x2267;0.25 is satisfied, and the segregation particles substantially do not include Mg.

Dielectric ceramic composition and electronic component

A multilayer ceramic composition showing good characteristics, even when electric intensity on dielectric layers is high and a stacked number of a multilayer ceramic capacitor is increased, and an electronic device thereof. Said composition comprises: a perovskite compound ABO, and with respect to 100 moles of said compound, 0.6 or more to 1.4 or less moles of RaOin which Ra is at least one of Dy, Gd and Tb, 0.2 or more to 0.7 or less moles of RbOin which Rb is at least one of Ho and Y, and 0.2 or more to 0.7 or less moles of RcOin which Rc is at least one of Yb and Lu, in terms of each oxide, 0.6 or more to 1.6 or less moles of Mg oxide in terms of Mg, and 0.6 or more to less than 1.2 moles of Si included compound in terms of Si.

Growing community of inventors

Tokyo, Japan

Kazuhiro Komatsu