Patent application number | Description | Published |
20080197802 | Power transmission control device, power reception control device, non-contact power transmission system, power transmission device, power reception device, and electronic instrument - A power reception device transmits authentication information (e.g., start code, manufacturer ID, product ID, rated power information, and resonance characteristic information) to a power transmission device before starting normal power transmission by a non-contact power transmission system. The power transmission device performs instrument authentication based on the received authentication information, and regulates the maximum transmission power is regulated to conform to a power-reception-device side rated power. The power transmission device then performs normal power transmission. | 08-21-2008 |
20080197804 | Power transmission control device, power reception control device, non-contact power transmission system, power transmission device, power reception device, and electronic instrument - A power transmission device performs power-saving power transmission that transmits a small amount of power as compared with normal power transmission when the power transmission device has detected that a battery of a load has been fully charged so that the operation of a charge control device (charge control IC) of the load is maintained, thereby enabling recharging due to a charge management function of the charge control device. Since the load state of a power reception device increases when recharging has started, the power transmission device detects an increase in the load state and changes power transmission from power-saving power transmission to normal power transmission. When the power reception device has been removed during power-saving power transmission, the power transmission device detects that the power reception device has been removed, and stops continuous power transmission so that unnecessary power consumption does not occur. | 08-21-2008 |
20080200119 | Power reception control device, power transmission control device, non-contact power transmission system, power reception device, power transmission device, and electronic instrument - A power-receiving-side control circuit of a power reception device performs intermittent load modulation by causing an NMOS transistor to be turned ON/OFF during normal power transmission. A power-transmission-side control circuit included in a power transmission control device of a power transmission device monitors, an intermittent change in the load of the power reception device during normal power transmission. The power-transmission-side control circuit determines that a foreign object has been inserted between a primary coil and a secondary coil and stops power transmission when an intermittent change in load cannot be detected. The amount of power supplied to the load may be compulsorily reduced when the load state of the load is heavy. | 08-21-2008 |
20090009006 | POWER TRANSMISSION DEVICE, ELECTRONIC INSTRUMENT, AND WAVEFORM MONITORING CIRCUIT - A power transmission device of a non-contact power transmission system includes a waveform monitoring circuit that generates and outputs a waveform-monitoring induced voltage signal based on a coil end signal of a primary coil, and a power transmission control device that controls a power transmission driver that drives the primary coil, the power transmission control device receiving the waveform-monitoring induced voltage signal and detecting a change in waveform of the induced voltage signal to detect a power-reception-side load state. The waveform monitoring circuit includes a first rectifier circuit having a limiter function, the first rectifier circuit including a current-limiting resistor provided between a coil end node where the coil end signal of the primary coil is generated and a monitoring node where the waveform-monitoring induced voltage signal is generated, performing a limiter operation that clamps the induced voltage signal at a high-potential-side power supply voltage, and subjecting the induced voltage signal to half-wave rectification. | 01-08-2009 |
20090021219 | POWER RECEPTION CONTROL DEVICE, POWER RECEPTION DEVICE, NON-CONTACT POWER TRANSMISSION SYSTEM, CHARGE CONTROL DEVICE, BATTERY DEVICE, AND ELECTRONIC INSTRUMENT - A power reception control device provided in a power reception device of a non-contact power transmission system includes a power-reception-side control circuit that controls an operation of the power reception device, and a power supply control signal output terminal that supplies a power supply control signal to a charge control device, the power supply control signal controlling power supply to a battery. The power-reception-side control circuit controls a timing at which the power supply control signal (ICUTX) is output from the power supply control signal output terminal. The operation of the charge control device is compulsorily controlled using the power supply control signal (ICUTX). | 01-22-2009 |
20090079387 | POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMITTING DEVICE, POWER-TRANSMITTING-SIDE DEVICE, AND NON-CONTACT POWER TRANSMISSION SYSTEM - A power transmission control device provided in a non-contact power transmission system includes a power-transmitting-side control circuit that controls power transmission to a power receiving device, an actuator control circuit that controls the operation of an actuator that moves the position of a primary coil in an XY plane, a relative position detection signal generation circuit that generates a relative position detection signal relating to the primary coil and a secondary coil based on a coil end voltage or a coil current of the primary coil, and a primary coil position control circuit that causes the actuator control circuit to move the position of the primary coil in the XY plane so that the relative positional relationship between the primary coil and the secondary coil indicated by the relative position detection signal is within an allowable range. | 03-26-2009 |
20090127936 | POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMITTING DEVICE, ELECTRONIC INSTRUMENT, AND NON-CONTACT POWER TRANSMISSION SYSTEM - A power transmission control device provided in a power transmitting device of a non-contact power transmission system includes a driver control circuit that controls a power transmitting driver that drives a primary coil, a load state detection circuit that detects a power-receiving-side load state, and a control circuit that controls the driver control circuit. The control circuit performs a foreign object detection process based on load state detection information from the load state detection circuit after receiving ID authentication information from a power receiving device, and starts normal power transmission to the power receiving device after performing the foreign object detection process. | 05-21-2009 |
20090267721 | COIL UNIT AND ELECTRONIC APPARATUS USING THE SAME - A coil unit includes a coil and a magnetic substance for receiving magnetic force lines generated by the coil, the magnetic substance including a first magnetic substance having a first magnetic permeability and a second magnetic substance having a second magnetic permeability. | 10-29-2009 |
20090278523 | NON-CONTACT POWER TRANSMISSION DEVICE, POWER TRANSMISSION DEVICE AND ELECTRONIC APPARATUS USING THE SAME - A non-contact power transmission device for supplying electric power to a secondary coil from a primary coil by electromagnetically coupling the primary coil to the secondary coil, includes a temperature detection element that detects temperature and a detection section that detects rise of temperature based on a first temperature at a first clock time and a second temperature at a second clock time detected by using the temperature detection element. When a degree of the rise of temperature is greater than a reference value, the non-contact power transmission device stops supplying of the electric power from the primary coil. | 11-12-2009 |
20090278666 | POWER RECEPTION DEVICE, ELECTRONIC APPARATUS, AND NON-CONTACT POWER TRANSMISSION SYSTEM - A power reception device includes a first resistance element having one end electrically connected to one end of a secondary coil which is able to be electromagnetically coupled to a primary coil of a power transmission devices a second resistance element having one end electrically connected to the other end of the first resistance element and having the other end supplied with a reference voltage, a power reception control device that obtains a frequency of an alternating current (AC) voltage induced on the secondary coil based on a voltage division signal output from the other end of the first resistance element and varies a magnitude of a load of the power reception device in accordance with the frequency, and a variable resistance element that has resistance varied in accordance with temperature and is connected to the first resistance element or the second resistance element in parallel. | 11-12-2009 |
20090322281 | POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMISSION DEVICE, POWER RECEIVING CONTROL DEVICE, POWER RECEIVING DEVICE, ELECTRONIC APPARATUS, METHOD FOR CONTROLLING POWER TRANSMISSION, AND METHOD FOR CONTROLLING POWER RECEIVING - A power transmission control device included in a contactless power transmission system that transmits power by electromagnetically coupling a primary coil and a secondary coil from a power transmission device to a power receiving device so as to supply the power to a load of the power receiving device includes: a controller that controls the power transmission device. The controller includes: a negotiation processing section that performs a negotiation process of contactless power transmission; and a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process. In the device, normal power transmission from the power transmission device to the power receiving device is started after the setup process. | 12-31-2009 |
20100013319 | POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMISSION DEVICE, POWER RECEIVING CONTROL DEVICE, POWER RECEIVING DEVICE, AND ELECTRONIC APPARATUS - There is provided a power transmission control device included in a power transmission device in a contactless power transmission system that transmits power from the power transmission device to a power receiving device by electromagnetically coupling a primary coil to a secondary coil to supply the power to a load of the power receiving device. The power transmission control device includes a controller controlling the power transmission control device, a host interface communicating with a power transmission-side host, and a register section accessible from the power transmission-side host via the host interface. The controller shifts into a communication mode that executes communication between the power transmission-side host and a power receiving-side host, when the power transmission-side host writes, via the host interface, a communication request command that requests the communication between the hosts in the register section. Then, the controller transmits the communication request command to the power receiving device. | 01-21-2010 |
20100013321 | POWER RECEIVING CONTROL DEVICE, POWER RECEIVING DEVICE, AND ELECTRONIC APPARATUS - A power receiving control device provided to a power receiving device included in a contactless power transmission system that transmits electric power from a power transmission device to the power receiving device by electromagnetically coupling a primary coil and a secondary coil so as to feed the electric power to a load serving as a power feeding object from a voltage output node of the power receiving device, which includes a rectifying circuit and a regulator; and transmits a load modulation signal to the power transmission device by load modulation performed by a load modulation section included in the power receiving device, in a period of the power feeding to the load as the power feeding object, includes a power receiving side control circuit controlling an operation of the power receiving device; and a power supply control signal output terminal for outputting a power supply control signal by which the power feeding to the load is temporarily stopped In the device, the power receiving side control circuit turns on a switch circuit provided between an input node and an output node of the regulator, based on detection of lowering of power feeding capability to the load, so as to put a bypass path, which directly connecting the input node and the output node of the regulator, in an ON state; turns off the switch circuit so as to forcibly put the bypass path in an OFF state, in a case where the power feeding to the load is temporarily stopped in a period during which the bypass path is formed, at one of timing at which a voltage level of the power supply control signal outputted from the power supply control signal output terminal is switched from a non-active level to an active level so as to temporarily stop the power feeding to the load and timing before the power feeding to the load is temporarily stopped; and turns on the switch circuit after releasing the temporary stop of the power feeding to the load so as to return the bypass path to the ON state. | 01-21-2010 |
20130088091 | POWER RECEPTION CONTROL DEVICE, POWER RECEPTION DEVICE, NON-CONTACT POWER TRANSMISSION SYSTEM, ELECTRONIC INSTRUMENT AND POWER RECEPTION CONTROL METHOD - A power reception control device provided in a power reception device of a non-contact power transmission system includes a power-reception-side control circuit that controls an operation of the power reception device, and a power supply control signal output terminal that supplies a power supply control signal to a charge control device, the power supply control signal controlling power supply to a battery. The power-reception-side control circuit controls a timing at which the power supply control signal (ICUTX) is output from the power supply control signal output terminal. The operation of the charge control device is compulsorily controlled using the power supply control signal (ICUTX). | 04-11-2013 |
20140368165 | POWER RECEPTION CONTROL DEVICE, POWER RECEPTION DEVICE, NON-CONTACT POWER TRANSMISSION SYSTEM, ELECTRONIC INSTRUMENT AND POWER RECEPTION CONTROL METHOD - A power reception control device provided in a power reception device of a non-contact power transmission system includes a power-reception-side control circuit that controls an operation of the power reception device, and a power supply control signal output terminal that supplies a power supply control signal to a charge control device, the power supply control signal controlling power supply to a battery. The power-reception-side control circuit controls a timing at which the power supply control signal (ICUTX) is output from the power supply control signal output terminal. The operation of the charge control device is compulsorily controlled using the power supply control signal (ICUTX). | 12-18-2014 |