摘要:
In an optical communications module comprising one or more dielectric substrates equipped with an optical transmitter section, an optical receiver section or an optical transceiver section, and a chassis encasing all of them, a metal part is formed on one side of at least one of the dielectric substrates such that the metal part constitutes the whole or a part of the exterior surface of the chassis so that the length of heat conduction from a dielectric substrate with heat-generating components installed thereon can be minimized so as to efficiently release heat through the metal part to outside, curbing a temperature increase within the chassis. Thus, the optical communications module can exhibit excellent performance.
摘要:
In an optical communications module comprising one or more dielectric substrates equipped with an optical transmitter section, an optical receiver section or an optical transceiver section, and a chassis encasing all of them, a metal part is formed on one side of at least one of the dielectric substrates such that the metal part constitutes the whole or a part of the exterior surface of the chassis so that the length of heat conduction from a dielectric substrate with heat-generating components installed thereon can be minimized so as to efficiently release heat through the metal part to outside, curbing a temperature increase within the chassis. Thus, the optical communications module can exhibit excellent performance.
摘要:
An optical communication module includes (a) at least one light-emitting device, at least one light-receiving device, or a combination of these; (b) an optically coupling means coupled optically with the device or each device; (c) an electric-circuit part connected to the device or each device; (d) multiple layers of electroconductive media supporting the device or devices, the optically coupling means or these optically coupling means, and the electric-circuit part or parts; and (e) a connector portion formed at the end portion of each of the electroconductive media. The insertion of the next-stage circuit substrate between the connector portions enables the electrical connection between the module and the next-stage circuit substrate having a multitude of leads without requiring a large space. An insulating spacer placed between the layers of the electroconductive media secures the electrical and thermal insulation. The module has a property of high-speed response.
摘要:
The electric circuit unit has a module having an electric or optical signal processing function. Between two parallel circuit boards, the module is bonded thereto and has an electric connection structure or an optical connection structure. This provides a small-size electric circuit unit with component elements mounted at high density.
摘要:
Disclosed is an inexpensive small-sized screen printing machine having low redundancy and high production efficiency and applicable to a dual conveying-type component mounting machine. The screen printing machine comprises a pair of substrate supporting tables provided to hold a respective substrate that is a print object and which is juxtaposed in a direction that is perpendicular to a conveying direction of the substrate, and a print executing section that performs a printing process alternately on the substrate held by the pair of substrate supporting tables. Due to the print executing section being driven in the direction under control of a control unit, a print position where the substrate supporting tables execute alternate printing is changed within a range in which one of the pair of substrate supporting tables and the other of the pair of substrate supporting tables oppose each other in the direction.
摘要:
According to a water-based composition characterized by containing a colorant, water, a wetting agent, an amine compound, a hydroxyl group-containing organic solvent and a urethane resin having a polycarbonate group, there is provided a water-based coating composition being capable of easily controlling the gloss of a coating film applied on an object to be coated, having good storage stability, and being excellent in wetting properties to an object to be coated and continuous discharge stability without causing nozzle clogging.
摘要:
A valve freeze control apparatus for an internal combustion engine includes a concentration sensor, a valve, a freeze control device, and a start determination unit. The concentration sensor is adapted to detect an alcohol concentration of fuel supplied to the internal combustion engine. The valve is provided in one of an intake passage and an exhaust passage of the internal combustion engine, wherein the valve controls flow of air that passes through the one of the intake and exhaust passages. The freeze control device is adapted to limit malfunction of the valve caused by freeze of water in exhaust gas, and the water has been attached to the valve. The start determination unit determines to start the freeze control device when the alcohol concentration detected by the concentration sensor is equal to or greater than a reference value.
摘要:
A door mirror retraction switch apparatus is configured to include a switch case, an insulator in which an actuator is disposed movably which is provided in an interior of the switch case in such a manner as to be surrounded by the switch case, and a lock mechanism, and a guide portion of the lock mechanism is formed in the insulator in such a manner as to have an opening which is made to open to an external surface of the insulator at one end thereof and to extend inwards of the insulator in a groove-like fashion from the opening, a lock member is movably inserted into the guide portion, and the opening of the guide portion is made to be closed by the switch case.
摘要:
An engine control apparatus feedback-controls a mixture air-fuel ratio of air-fuel mixture supplied to each cylinder of the engine based on an exhaust air-fuel ratio detected by an air-fuel ratio sensor. The control apparatus further calculates an exhaust air-fuel ratio change rate at every predetermined interval and integrates an absolute value of the exhaust air-fuel ratio change rate. The control apparatus determines an abnormality in any one of engine cylinders when an integration value of the exhaust air-fuel ratio change rate exceeds a predetermined reference value.
摘要:
A coolant circuit circulates coolant between an internal combustion engine and a radiator of a vehicle and is provided with a thermostat. A control unit obtains radiator side released heat amount information, which indicates the amount of heat released from coolant through the radiator or information relevant to the amount of heat released from the coolant through the radiator. The control unit determines whether a thermostat open state abnormality exists by determining whether a predetermined thermostat abnormal time correlation exists between the radiator side released heat amount information and a vehicle speed of the vehicle in a warm-up incomplete temperature range of the coolant.