Abstract: A switching module 120 includes a positive-side conductor 51 in contact with an input-side electrode 30a provided on each upper arm switching element 30U, a negative-side conductor 52 connected to an output-side electrode 30b of each lower arm switching element 30L, and an electric insulating member 140 in contact with, at its upper surface, each output conductor 53 in contact with the input-side electrode 30a of each lower arm switching element 30L and in contact with, at its lower surface, an electric conductive heat radiation member 42. Each positive-side electric conductive layer 61 connected to the positive-side conductor 51 faces a corresponding one of negative-side electric conductive layers 62 connected to the negative-side conductor 52 via the electric insulating layer 60 such that a storage structure 63 interposed between the positive-side main line 21 and the negative-side main line 22 to store charge is inside the electric insulating member 140.

Abstract: Provided is a switching device 1 including a drain fin 103 arranged below a semiconductor chip 101 via a common mode current suppression structure 2. The common mode current suppression structure 2 includes a first insulating layer 2a joined on the drain fin 103, an electric conductive layer 2b joined on the first insulating layer 12a, a second insulating layer 2c joined on the electric conductive layer 2b, and an electrode conductor 2d joined on an upper surface of the second insulating layer 2c and joined to a drain electrode 101a of the semiconductor chip 101. The electric conductive layer 2b is electrically connected to a source electrode 101b of the semiconductor chip 101.

Abstract: Provided is an inverter 1 configured such that an electric component portion 1a is integrated with a cooling portion 1b. A switching module 20 includes a heat sink 102 joined to the lower surface of a substrate 101. The cooling portion 1b includes an electric conductive cooler 10 forming a refrigerant flow path 11. The switching module 20 is attached to the cooler 10 such that a heat radiation portion 102d of the heat sink 102 is exposed to the inside of the cooler 10. A common mode current suppression structure 21 including an insulating member is interposed between the heat sink 102 and the cooler 10 to electrically insulate the heat sink 102 and the cooler 10 from each other.

Abstract: A small and low-cost load driving circuit device that reduces common mode noise without using a transformer, has a first switching arrangement provided between a high potential source and a terminal of an electrical load; a second switching arrangement provided between ground and the other terminal of the electrical load; a control arrangement that controls the first and second switching arrangements so as to simultaneously disconnect each other with the same frequency and the same duty ratio; and a synchronization arrangement that synchronizes the disconnect timing of the first switching arrangement and the disconnect timing of the second switching arrangement.

Abstract: A voltage conversion device includes: first and second loop circuits having a common inductance element. Electric current alternately flows through the first or second loop circuit as a first switching element of the first loop circuit is turned on or off. A magnetic field that is formed when the first switching element is turned on and that penetrates through the first loop circuit and a magnetic field that is formed when the first switching element is turned off after it is turned on and that penetrates through the second loop circuit have the same direction. All elements that constitute the first and second loop circuits are arranged on the same surface of a substrate. The second loop circuit is connected to a second direct-current power source. The first loop circuit is connected to a first direct-current power source.

Abstract: A switching power supply circuit includes a PWM drive circuit (12) that performs the PWM driving of a switching element (Q1) at a duty ratio (D) commensurate with an input target voltage (VS), and generates from an input voltage (VB) an output voltage (VTL) whose target value is the target voltage (VS), by the PWM drive circuit (12) driving the switching element (Q1). The switching power supply circuit further includes a control circuit (13) and a target voltage limiting circuit (14) that together fix the duty ratio (D) regardless of the target voltage (VS), when a difference between the input voltage (VB) and the target voltage (VS) is less than or equal to a predetermined constant value (?).

Abstract: A panel device includes a panel section, a first conductive layer that is provided in a side of one surface of the panel section, an insulating layer that is stacked on the first conductive layer and a second conductive layer that is stacked on the insulating layer. The first conductive layer and the second conductive layer are formed by coating an electrically conductive solvent-type substance. The insulating layer is formed by coating an insulating curing-acceleration-type substance.

Abstract: The present invention is related to a voltage conversion apparatus having a first loop circuit and a second loop circuit which share an inductance component, in which a current passes through the first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first loop circuit, characterized in that a direction of a magnetic field through the first loop circuit generated at the ON operation of the first switching element in the first loop circuit is the same as a direction of a magnetic field through the second loop circuit generated at the OFF operation of the first switching element in the first loop circuit subsequent to the ON operation.

Abstract: A switching apparatus is disclosed that includes a first loop circuit configured to include a switching element, an inductive component and a capacitor; and a second loop circuit configured to share the inductive component with the first loop circuit, wherein the capacitor is inserted in series with the inductive component in the first loop, wherein the switching apparatus controls respective currents flowing through the first loop circuit and the second loop circuit in an alternating manner by turning on/off the switching element in order to control the current flowing through the inductive component, and wherein a first magnetic flux generated by the current flowing through the first loop circuit as the switching element is being turned on and a second magnetic flux generated by the current flowing through the second loop circuit as the switching element is being turned off head in the same direction.

Abstract: A remaining capacity equalizing device is provided having an inductance connected to a reference node of a battery pack and first and second switching elements. A first closed circuit is formed through selecting sequentially a first switching switch from a first switching switch group that is connected to the high-voltage side of the reference node. A second closed circuit is formed by selecting sequentially a second switching switch from among a second switching switch group that is connected to the low-voltage side of the reference node. The first and second switching elements are turned ON/OFF alternatingly for each combination of first and second closed circuits so that, during a specific interval, the ratio of the conductive times of the first and second switching elements is the inverse of the ratio of the numbers of storage cells in the first and second closed circuits.

Abstract: A voltage conversion apparatus is disclosed in which a current passes through first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first circuit. The direction of a magnetic field through the first loop circuit formed at the ON operation is the same as a direction of a magnetic field through the second loop circuit formed at the OFF operation. The first loop circuit and the second loop circuit are provided on opposite sides of a printed circuit board, respectively, in such a manner that the first loop circuit and the second loop circuit are opposed to each other. A heat sink is provided on a surface of the printed circuit board. A solid pattern of a metal material is provided on an inner layer of the printed circuit board to be connected to the heat sink via a through hole.

Abstract: An EL emitting touch switch includes first electrodes, a single second electrode facing the first electrodes, and EL layers each sandwiched between a corresponding one of the first electrodes and the second electrode. A light emission driver applies a driving voltage between the first and second electrodes to cause the EL layers to emit light. A timing signal generator generates a timing signal to control the light emission driver such that the application of the driving voltage is stopped at predetermined intervals. Touch decision units are provided for each first electrode. Each touch decision unit includes a feedback circuit for supplying current to the corresponding first electrode such that the potentials of the first and second electrodes become equal to each other, and detects contact of a human body with the corresponding first electrode based on operation of the feedback circuit while the application of the driving voltage is stopped.

Abstract: An electrostatic capacitive touch sensor device includes sensing electrode provided at a plurality of positions, a high-frequency signal source that applies a high-frequency signal to the sensing electrode through a predetermined impedance element, a wiring portion that connects the sensing electrode and the impedance element, a shield portion provided to embrace the sensing electrodes and the connecting pattern, and a shield signal source that applies a shield signal to the shield portion and has the same phase and amplitude as the high-frequency signal source.

Abstract: A duty ratio/voltage conversion circuit that converts the duty ratio of an input signal into voltage level and outputs the voltage level includes: an input terminal to which the input signal is input; a first CR integrating circuit that integrates the input signal; a load resistor a first end of which is connected to an output point of the first CR integrating circuit, and a second end of which is grounded; and an output terminal connected to the load resistor. The first CR integrating circuit includes a first pathway that has a first resistor, and a second pathway in which a phase inversion portion, a second resistor and a first capacitor are connected in series, and is a parallel circuit in which first and second ends of the first pathway are connected to first and second ends, respectively, of the second pathway.

Abstract: A detection circuit 1 includes: an input unit 2; two contact electrodes A and B which are connected to the input unit; phase inversion unit 3 connected to the contact electrode A; one amplification unit 41 arranged in each contact unit; and detection units 5A and 5B which detect as an electric change amount, an amplitude change of an input signal caused by a capacitance change in each of the contact electrodes A and B. The detection circuit 1 causes the two electrodes to input signals having phases shifted by a half period from each other by using the phase inversion unit 3. In the presence of contact, the amplitude of the input pulses is amplified by the one amplification unit 41. The respective detection units 5A and 5B detect signals of respective electrodes from the one amplified signal and output them to output units 6A and 6B, respectively.

Abstract: A small and low-cost load driving circuit device that reduces common mode noise without using a transformer, has a first switching arrangement provided between a high potential source and a terminal of an electrical load; a second switching arrangement provided between ground and the other terminal of the electrical load; a control arrangement that controls the first and second switching arrangements so as to simultaneously disconnect each other with the same frequency and the same duty ratio; and a synchronization arrangement that synchronizes the disconnect timing of the first switching arrangement and the disconnect timing of the second switching arrangement.

Abstract: A touch sensor device 1 includes a touch sensor 11; an average value calculating means 12 for calculating the average value of output voltages sent out from an output section 111 of the touch sensor 11; a threshold value calculating means 13 for calculating a threshold value based on the average value; and a comparing/determining means 14 for comparing the output voltage with the threshold value and, when determining that the output voltage exceeds the threshold value, outputting a determination signal.

Abstract: A touch sensor device comprises: a touch sensor 1 for sending out an output voltage signal S1 representing the presence or absence of an operation; an operation presence/absence determination unit 2 which, when the output voltage signal has a value equal to or more than a predetermined threshold value, determines that the operation has occurred; a stability determination unit 5 for detecting whether a differential signal S3 representing a differential value obtained by differentiating the output voltage signal is limited within a predetermined range or not; and a count-up timer 4 which, when a period during which the differential signal is limited within the predetermined range becomes a predetermined time period or longer on the premise that the output voltage signal has the value equal to or more than the predetermined threshold value, sends out an ON determination signal S5 and allows an external device 7 to operate.

Abstract: A duty ratio/voltage conversion circuit that converts the duty ratio of an input signal into voltage level and outputs the voltage level includes: an input terminal to which the input signal is input; a first CR integrating circuit that integrates the input signal; a load resistor a first end of which is connected to an output point of the first CR integrating circuit, and a second end of which is grounded; and an output terminal connected to the load resistor. The first CR integrating circuit includes a first pathway that has a first resistor, and a second pathway in which a phase inversion portion, a second resistor and a first capacitor are connected in series, and is a parallel circuit in which first and second ends of the first pathway are connected to first and second ends, respectively, of the second pathway.

Abstract: A switching power supply circuit includes a PWM drive circuit (12) that performs the PWM driving of a switching element (Q1) at a duty ratio (D) commensurate with an input target voltage (VS), and generates from an input voltage (VB) an output voltage (VTL) whose target value is the target voltage (VS), by the PWM drive circuit (12) driving the switching element (Q1). The switching power supply circuit further includes a control circuit (13) and a target voltage limiting circuit (14) that together fix the duty ratio (D) regardless of the target voltage (VS), when a difference between the input voltage (VB) and the target voltage (VS) is less than or equal to a predetermined constant value (?).