Abstract: A voltage detector for a storage element that includes a positive electrode and a negative electrode, both being biased to a positive voltage, is disclosed. The voltage detector includes a first PNP transistor of which emitter terminal is connected to the negative terminal and its base terminal is connected to its collector terminal, a voltage-current converter of which first end is connected to the positive electrode, a second PNP transistor of which emitter terminal is connected to a second end of the converter and its base terminal is connected to the base terminal of the first PNP transistor, a current source connected to the collector terminal of the first PNP transistor for drawing a current from the collector terminal, a current sensing circuit connected to the collector terminal of the second PNP transistor for sensing a collector current, and a voltage output circuit for outputting a voltage across the positive electrode and the negative electrode based on an output from the current sensing circuit.

Abstract: The power supply unit has a sample-and-hold circuit that samples a voltage supplied from a power source to a load according to a sample timing signal and holds the voltage as an output set value for the DC/DC converter. The unit supplies a load with an output from the DC/DC converter controlled so that an output voltage of power source (22) becomes an output set value of the DC/DC converter when the voltage of power source (22) drops. Since a voltage corresponding to the voltage of the power source before the voltage drop is set to the output set value of the DC/DC converter, a stable power supply unit is obtained in which the difference is always small between the voltage of the power source in normal times and the output voltage from the DC/DC converter when the voltage of the power source temporarily fluctuates.

Abstract: A power-supply stabilizer is arranged to be used in a vehicle which includes an alternator connected with an engine mechanism, a battery charged by the alternator, a starter connected with the battery, and an electrical load having a first end and a second end connected with the battery. The power-supply stabilizer includes a storage element, a first terminal coupled to the battery and connected with the first end of the electrical load, a second terminal connected between the battery and the second end of the electrical load, and a bidirectional DC/DC converter. The bidirectional DC/DC converter is coupled to the battery and connected between the first terminal and the second terminal for charging and discharging the storage element. The power-supply stabilizer is arranged to be connected in parallel with the electrical load. The power-supply stabilizer stabilizes a voltage supplied from the battery while being located far away from the battery.

Abstract: A power supply device of the present invention includes a switching element and a switch that operate so that when a primary DC voltage source of the device is in a voltage drop state, the power of a secondary auxiliary voltage source thereof is mixed with the power of the DC voltage source in a balanced manner and supplied to a load. This structure can reduce the maxim amount of power storage necessary for the auxiliary voltage source and thus the number of power storage elements necessary for the auxiliary voltage source. Thus, a smaller power supply device can be provided.

Abstract: A limit value of an output current of power converter is defined as a first current value when a voltage at both ends of capacitor is higher than a voltage at both ends of battery, and a limit value of the output current thereof is defined as a second current value when the voltages are substantially equal to each other, the first current value is set to be smaller than the second current value. Thus, when a voltage at both ends of capacitor and a voltage at both ends of battery are substantially equal, heat is hardly generated. The limit value of the output current is set to a maximum current consumed by load. When a voltage at both ends of capacitor is higher than a voltage at both ends of battery, the limit value of the output current is set to be smaller than the second current value, and thereby heat generation is suppressed. Thus, the size of the heat dissipating components can be reduced, and a power supply system whose entire size can be minimized can be provided.

Abstract: A robot system capable of safely and stably holding an object with an optimum holding method and holding force.

Abstract: An engine start device includes a generator, a battery charged by the generator, a starter, an electric double layer capacitor and a DC/DC converter. The electric double layer capacitor is connected between the starter and the battery. The DC/DC converter has an input terminal connected to the battery and the electric double layer capacitor. The DC/DC converter has an output terminal connected to the starter and the electric double layer capacitor. According to voltage of the battery, internal DC resistance of the battery or internal DC resistance of the electric double layer capacitor, the DC/DC converter effects control of charge voltage of the electric double layer capacitor so as to stabilize voltage applied to a starter motor and stabilize the engine start.

Abstract: In a bidirectional power supply device, a DC-DC converter is connected such that the longer an ON time of the first switch becomes, the higher a voltage of a second positive terminal and a second negative terminal becomes. When stopping the supply of power from a first positive terminal and a first negative terminal to a second positive terminal and a second negative terminal, a control circuit turns OFF a third switch, and then operates a switching signal generation circuit so that the ON time of the first switch becomes a maximum. The switching signal generation circuit is operated so that the ON time of the first switch becomes a maximum with the third switch turned OFF in start-up when supplying power from the second positive terminal and the second negative terminal to the first positive terminal and the first negative terminal.

Abstract: A wireless operating system is provided which can be applied even to such an environment that a plurality of controllers and a plurality of operating terminals are mixed with each other, and also, can readily establish communications within a short time. A first wireless station transmits a calling instruction to a second wireless station via a connection-purpose channel which has been set, and when the first wireless station receives a response, the first wireless station switches the connection-purpose channel to a communication-purpose channel contained in the response data.

Abstract: A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, a liquid crystal disposed between the first substrate and the second substrate, plural pixel electrodes arranged in a matrix on a second substrate, a counter electrode provided on one of first substrate and the second substrate and plural switching elements connected to the respective plural pixel electrodes, a display drive control unit for driving the liquid crystal disposed between each of the pixel electrodes and the counter electrode, a lighting unit having LEDs emitting light of respective red, green and blue colors, and a lighting device control unit for making each LED of color perform time-division light emission in synchronization with the switching of each of the switching elements.

Abstract: A miniature solid electrolytic capacitor is provided, which is suitable for being disposed within an electrically insulating layer, and is connected to other component using an electrically conductive adhesive with a connection resistance at an anode low and with connection reliability improved. Specifically, the electrolytic capacitor includes a valve metal element for an anode 10 having a capacitor forming part 10A and an electrode lead part 10B, a dielectric oxide film 11 formed on the valve element, a solid electrolyte layer 12 formed on the dielectric oxide film 11 and a charge collecting element for a cathode 13 formed on the solid electrolyte layer 12, wherein at least one through hole 15 is formed in the electrode lead part 10B so as to expose a core 10C of the valve metal element, and an exposed portion 10D of the core is used for connecting portion.

Abstract: In a module including circuit elements, a plurality of wires, which are generally two-dimensionally formed, are multi-layered via electrically insulating material, which comprises a mixture including at least filler and electrically insulating resin. One or more circuit elements are electrically connected to the wires, and at least a part of those circuit elements is embedded in the electrically insulating material. The module further includes a heat sink member that has a higher thermal conductivity than the electrically insulating material, and that, when viewed from the direction of multi-layering the wires, overlaps with a circuit element, which is one of those circuit elements, exhibiting the highest temperature rise at least in the module.

Abstract: A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, a liquid crystal disposed between the first substrate and the second substrate, plural pixel electrodes arranged in a matrix on a second substrate, a counter electrode provided on one of first substrate and the second substrate and plural switching elements connected to the respective plural pixel electrodes, a display drive control unit for driving the liquid crystal disposed between each of the pixel electrodes and the counter electrode, a lighting unit having LEDs emitting light of respective red, green and blue colors, and a lighting device control unit for making each LED of color perform time-division light emission in synchronization with the switching of each of the switching elements.

Abstract: A miniature solid electrolytic capacitor is provided, which is suitable for being disposed within an electrically insulating layer, and is connected to other component using an electrically conductive adhesive with a connection resistance at an anode low and with connection reliability improved. Specifically, the electrolytic capacitor includes a valve metal element for an anode 10 having a capacitor forming part 10A and an electrode lead part 10B, a dielectric oxide film 11 formed on the valve element, a solid electrolyte layer 12 formed on the dielectric oxide film 11 and a charge collecting element for a cathode 13 formed on the solid electrolyte layer 12, wherein at least one through hole 15 is formed in the electrode lead part 10B so as to expose a core 10C of the valve metal element, and an exposed portion 10D of the core is used for connecting portion.

Abstract: A circuit component built-in module can be produced by filling a conducting material in through holes of a sheet-like member, stacking the sheet-like member and a metal foil on a circuit component package, and applying heat and pressure to embed the circuit component in the sheet-like member, and patterning the metal foil. The circuit component package includes a mounting member with substrate and wiring pattern and a circuit component. The circuit component includes a component body and external electrode, with the component body being thinner at a portion on which the external electrode is provided. The external electrode is provided on a surface of the circuit component that is opposed to the mounting member, and the component body is in contact with the mounting member.

Abstract: A robot apparatus having a robot and a controller for controlling the robot. The apparatus has a diagnosing computer connected to the controller and acquiring a state quantity of the robot. An analyzing computer is provided remotely from the robot and has a control parameter adjuster for adjusting a control parameter of the robot, and a communicating function of connecting the computers. The state quantity is transmitted to the analyzing computer by the communicating function and a control parameter of the robot is obtained based on the state quantity. The control parameter is transmitted to the controller through the diagnosing computer to control the robot.

Abstract: A miniature solid electrolytic capacitor is provided, which is suitable for being disposed within an electrically insulating layer, and is connected to a component using an electrically conductive adhesive with a connection resistance at an anode being low and with connection reliability being improved. Specifically, the electrolytic capacitor includes a valve metal element for an anode having a capacitor forming part and an electrode lead part, a dielectric oxide film formed on the valve element, a solid electrolyte layer formed on the dielectric oxide film and a charge collecting element for a cathode formed on the solid electrolyte layer, wherein at least one through hole is formed in the electrode lead part so as to expose a core of the valve metal element, and wherein an exposed portion of the core is used as a connecting portion.

Abstract: A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, a liquid crystal disposed between the first substrate and the second substrate, plural pixel electrodes arranged in a matrix on a second substrate, a counter electrode provided on one of first substrate and the second substrate and plural switching elements connected to the respective plural pixel electrodes, a display drive control unit for driving the liquid crystal disposed between each of the pixel electrodes and the counter electrode, a lighting unit having LEDs emitting light of respective red, green and blue colors, and a lighting device control unit for making each LED of color perform time-division light emission in synchronization with the switching of each of the switching elements.

Abstract: A power module of the present invention mounts electronic components and comprises a circuit board that constitutes an electric power conversion circuit along with the above-mentioned electronic components; a heat sink; and a member with insulation characteristics and high thermal conductivity, which is disposed between plural devices with high heating value among the above-mentioned electronic components and the above-mentioned heat sink, embeds at least part of each of the above-mentioned plural devices with high heating value therein and transfers heat from the above-mentioned plural devices with high heating value to the above-mentioned heat sink.

Abstract: The invention provides a power module that is excellent in heat dissipation and suitable for the trend of miniaturization with high density, and provides also a method of manufacturing the same. The power module includes an insulating layer including an inorganic filler and a thermosetting resin composition, a lead formed on the surface of the insulating layer, and a semiconductor chip mounted on a insulating layer side of the lead, and a heat sink formed on the backside of the insulating layer. The semiconductor chip is mounted on the lead by flip-chip bonding and sealed in the insulating layer.