Abstract: A circuit board device includes: a printed wiring board; an IC chip provided on an obverse surface of the board and having at least one ground terminal; and a wiring pattern, disposed on the board, for providing a ground potential to the ground terminal of the IC chip. The wiring pattern is disposed on a reverse surface of the printed wiring board. The circuit board device has at least one via that is connected to the wiring pattern and passes through the printed wiring board at a position within a region where the IC chip is mounted on the obverse surface of the printed wiring board.

Abstract: An electroacoustic transducer includes a driver, a diaphragm 13 driven to vibrate by the driver and emitting sound, a baffle 22 holding the driver and the diaphragm 13, first openings 25 extending through the baffle 22, an acoustic resistor 23 disposed on the back side of the baffle 22, and second openings 26 extending from the front side to the back side of the acoustic resistor 23. The baffle 22 is provided on the back side of the diaphragm 13. The first openings 25 are provided in the baffle 22. The second openings 26 are each disposed above one of the first openings 25 in the acoustic resistor 23. The electroacoustic transducer exhibits an excellent frequency response even if a sufficient volume of a space is not provided on the back side of the diaphragm 13.

Abstract: An air bag ECU includes an ECU communication unit communicating with an external sensor (for example, a front right acceleration sensor) and a faulty sensor mount determination unit determining whether a faulty sensor having been diagnosed as being faulty before is connected to the air bag ECU based on failure history data indicating whether the external sensor has been diagnosed as being faulty before. The faulty sensor mount determination unit compares identification data recorded in, for example, a faulty sensor ID recording unit, for individually identifying an external sensor having been diagnosed as being faulty before with the identification data of the external sensor connected to the air bag ECU and determines whether a faulty sensor is connected to the air bag ECU.

Abstract: A fuel cell stack includes: a cell stack structure formed by stacking a plurality of cells; a pair of current collectors; a pair of end members; and a fastener band wrapped around a cell stack formed by stacking the cell stack structure, the pair of current collectors, and the pair of end members. Each of the pair of end members includes a plurality of plate members. The plate members have a same arched shape in which a height from a surface to contacting a corresponding one of the pair of current collectors gradually increases toward a center portion from both ends, and are disposed in parallel while being apart from each other in a width direction of the fastener band. Adjacent plate members are coupled to each other through a bendable coupling member at part of facing surfaces.

Abstract: A combined oil ring in which carbon sludge and the like are not deposited between side rails and a spacer expander even if an internal combustion engine is operated for a long period of time. The combined oil ring includes an outer circumferential end portion of a space forming part and a continuous part that are closed and not open toward the outer circumferential side, thereby reducing carbon sludge deposits.

Abstract: A wiring structure is provided for an electroacoustic transducer directly converting digital signals from a single sound source to sound waves without conversion to analog signals. The structure includes a diaphragm, and a plurality of voice coils fixed to the diaphragm. The voice coils are connected to respective cables each consisting of a stranded pair of positive and negative input lines.

Abstract: An electroacoustic transducer includes a driver, a diaphragm 13 driven to vibrate by the driver and emitting sound, a baffle 21 holding the diaphragm 13, first apertures 25 extending from the front surface to the rear surface of the baffle 21, and a first acoustic resistor 22 disposed on the front surface of the baffle so as to cover the first apertures. The electroacoustic transducer includes a plurality of sound paths for guiding the sound generated by the diaphragm 13 to the rear surface of the baffle 21.

Abstract: An electroacoustic transducer includes a driver, a diaphragm 13 driven to vibrate by the driver and emitting sound, a baffle 22 holding the driver and the diaphragm 13, first openings 25 extending through the baffle 22, an acoustic resistor 23 disposed on the back side of the baffle 22, and second openings 26 extending from the front side to the back side of the acoustic resistor 23. The baffle 22 is provided on the back side of the diaphragm 13. The first openings 25 are provided in the baffle 22. The second openings 26 are each disposed above one of the first openings 25 in the acoustic resistor 23. The electroacoustic transducer exhibits an excellent frequency response even if a sufficient volume of a space is not provided on the back side of the diaphragm 13.

Abstract: An electroacoustic transducer includes a driver, a diaphragm 13 driven to vibrate by the driver and emitting sound, a baffle 22 holding the driver and the diaphragm 13, first openings 25 extending through the baffle 22, an acoustic resistor 23 disposed on the back side of the baffle 22, and second openings 26 extending from the front side to the back side of the acoustic resistor 23. The baffle 22 is provided on the back side of the diaphragm 13. The first openings 25 are provided in the baffle 22. The second openings 26 are each disposed above one of the first openings 25 in the acoustic resistor 23. The electroacoustic transducer exhibits an excellent frequency response even if a sufficient volume of a space is not provided on the back side of the diaphragm 13.

Abstract: Provided is a combined oil ring that further reduces engine oil consumption. A combined oil ring attached to an oil ring groove of a piston includes: a pair of upper and lower side rails each formed into a flat annular shape, and having a slide contact part that comes into sliding contact with a cylinder; and a spacer expander arranged between the pair of upper and lower side rails. In at least the upper side rail of the pair of upper and lower side rails, a cross-sectional shape of the slide contact part along an axial direction of the piston is a tapered shape linearly spreading from upper to lower parts of the piston; the tapered shape is at an angle of 5 to 30 degrees with respect to a central axis of the spacer expander, and has a vertex of the tapered shape within 0.15 mm from a lower end of the side rail; and a part closer to the lower end than the vertex is formed into a curved shape having a curvature of R0.01 to 0.5.

Abstract: A switching transistor is configured such that its on resistance RON is switchable between at least two values RON1 and RON2. When the switching transistor is switched from off to on, a control circuit sets the on resistance of the switching transistor to the first value RON1 for a first period immediately after the switching of the switching transistor. Subsequently, for a second period until the switching transistor is turned off, the control circuit sets the on resistance of the switching transistor to the second value RON2 that is smaller than the first value RON1.

Abstract: Provided is an organic EL element having less color variation. The organic EL element (1) of the invention includes, between a pair of an anode (4) and a cathode (14), a first light emitting layer (8) composed of at least one layer and a second light emitting layer (10) composed of at least one layer, the layers being laminated from the anode (4) side, in which the volume concentration of the luminescent dopant included in the second light emitting layer (10) is higher than the volume concentration of the luminescent dopant included in the first light emitting layer (8).

Abstract: Provided is a flux that includes at least one polybutadiene (meth)acrylate compound selected from polybutadiene (meth)acrylate compounds and polybutadiene (meth)acrylate compounds, and a hydrogenated dimer acid.

Abstract: Provided is a headphone unit including a housing having a convex portion and accommodating a driver unit, a support in contact with part of the outer surface of the convex portion, and a frictional member in contact with the support and the outer surface of the convex portion. The frictional member generates greater friction against the convex portion than the friction between the support and the convex portion. The housing is swingably joined to the support.

Abstract: A combined oil ring that reduces deposits between side rails and a spacer expander there between. The spacer expander includes: upper pieces and lower pieces that are alternately arranged in a circumferential direction to be spaced apart in an axial direction and the circumferential direction; coupling pieces that respectively couple the adjacent upper and lower pieces; and ear parts that erect in an inner circumferential end portion of the upper and lower pieces and push the side rails. At least one of an upper surface of each upper piece and a lower surface of each lower piece has a groove formed thereon. Ear parts have a through-hole with which the groove is communicated and a distance along the axial direction between an upper or lower surface of each ear part at a top thereof and a deepest portion of the groove is at least 0.22 mm.

Abstract: A REC unit manages card information on each of L1 cards handling a physical channel, L2-1 cards handling a logical channel, and L2-2 cards in which a scheduling function for communication processing performed with respect to the L1 card and/or the L2-1 card is implemented. A call control card of the REC unit selects, for each of first to third channels, a processing card establishing a signal path relevant to the logical channel from among the L1 card, the L2-1 card, and the L2-2 card. The call control card transmits connection relation information indicating a combination of the processing cards selected to each processing card. On the basis of the connection relation information received from the call control card, each processing card establishes the signal path for each of the first to third channels relevant to the logical channel between the processing cards.

Abstract: An input signal having a high level or a low level is input to a pad. A first protection element includes a first transistor configured as an N-channel MOSFET designed so as to withstand ESD. A second protection element includes a second transistor configured as a P-channel MOSFET designed so as to withstand ESD. A capacitance element is connected to a second line, and forms an RC filter together with a filter resistor. The capacitance element includes at least one from among a third transistor having the same device structure as that of the first transistor and a fourth transistor having the same device structure as that of the second transistor.

Abstract: A concentrated power-distribution member for a concentrated winding motor including a ring-shaped busbar and a coil connection terminal formed in one-piece with the busbar to hold a coil winding end positioned in an inner side of the busbar. The coil connection terminal has an erected portion extending from the busbar in parallel with the center axis of the busbar and a pair of arms extending from the leading end of the erected portion toward a center axis. A pair of arms is constructed by a pair of wing portions that extend to both sides of the erected portion and are bent toward the center axis along a bending line parallel to the center axis. A coil end holding portion is provided in leading ends of the pair of arms. According to this construction, a dimension of the concentrated power-distribution member is reduced.

Abstract: An organic electroluminescent element includes a layer having a shallower LUMO and a higher T1 than those of the first light-emitting layer on the anode side of the first light-emitting layer, and a layer which satisfies at least one of a deeper LUMO and includes a lower T1 than those of the second light-emitting layer on the anode side of the second light-emitting layer, and provides the organic electroluminescent element capable of suppressing the lowering of display quality.

Abstract: A switching transistor is configured such that its on resistance RON is switchable between at least two values RON1 and RON2. When the switching transistor is switched from off to on, a control circuit sets the on resistance of the switching transistor to the first value RON1 for a first period immediately after the switching of the switching transistor. Subsequently, for a second period until the switching transistor is turned off, the control circuit sets the on resistance of the switching transistor to the second value RON2 that is smaller than the first value RON1.