Patent application number | Description | Published |
20080203163 | Manual noncontact IC card reader - A technology that is applicable generally to manual noncontact card readers regardless of whether they are of insertion or swipe type, and realizes stable communication even with antennas of small size is provided. A pair of loop antennas | 08-28-2008 |
20100031154 | RADIO COMMUNICATION SYSTEM, RADIO EQUIPMENT, AND SERVER - A plurality of servers each transmit data of an initial screen to be displayed on a display screen of radio equipment at a predetermined time interval. The radio equipment is in a reception waiting mode until it is connected to any one of the servers, and is performing channel scanning. Once the data of the initial screen transmitted from any one of the servers is received by the radio equipment, the radio equipment displays the initial screen on the display screen based on the received data. When an operation of a connection instruction is performed on the initial screen, the radio equipment is connected to the server corresponding to the initial screen. | 02-04-2010 |
20130162496 | MULTI-ANTENNA DEVICE AND COMMUNICATION APPARATUS - A multi-antenna device includes a feeding element and a passive element. The feeding element has first and second antenna elements. The passive element is disposed between the first and second antenna elements. The passive element has a first portion that is grounded at one end, a second portion that is grounded at one end and a third portion that is grounded at one end via a serially connected member with inductance. The third portion is connected at the other end to the other ends of the first and second portions. | 06-27-2013 |
20140248836 | COMMUNICATION DEVICE AND FEEDER DEVICE - A communication device includes a sensor, an antenna, and a notification component. The sensor is configured to detect magnetic field strength. The antenna is configured to generate a magnetic field. The antenna is further configured to communicate with a wireless device that is configured to generate a magnetic field during communication. The notification component is configured to notify a positional offset between the antenna and the wireless device based on output signal indicative of the magnetic field strength. The sensor is arranged with respect to the antenna such that an effect of the magnetic field generated by the antenna on the output signal is suppressed. | 09-04-2014 |
20140300197 | AMPLITUDE MODULATION CIRCUIT AND NON-CONTACT POWER FEEDING DEVICE - An amplitude modulation circuit includes a resonance circuit powered by an oscillator and comprising a power transmission coil with a first coil portion, a second coil portion, a modulation coil, and a resonance condenser; and a switch that switches between a state where the first coil portion and the second coil portion are connected in series and a state where the first coil portion and the modulation coil are connected in series according to a level switching timing of transmission data and a timing when a coil current in the resonance circuit becomes zero. The combined inductance of the first coil portion and the second coil portion connected in series and a combined inductance of the first coil portion and the modulation coil connected in series are equal. | 10-09-2014 |
20140300198 | NON-CONTACT COMMUNICATION COIL, NON-CONTACT POWER FEEDING DEVICE, AND NON-CONTACT POWER RECEIVING DEVICE - A non-contact communication coil for a non-contact power feeding device comprises a power transmission coil, a power receiving coil, and a resonance coil, and the non-contact communication coil includes a first receiver and a second receiver connected in series with the first receiver. The non-contact communication coil generates induction voltages in mutually opposing directions in the first receiver and the second receiver when current passes through at least one of the power transmission coil and the power receiving coil. | 10-09-2014 |
20140300315 | NON-CONTACT POWER FEEDER AND NON-CONTACT POWER FEEDING METHOD - A non-contact power feeder includes a plurality of power transmission coils disposed along a disposition surface, wherein a power receiving device that houses a power reception coil is disposed on the disposition surface, and a controller that determines a first traveling wave power, from among a plurality of traveling wave powers, that feeds the power transmission coil corresponding to the power receiving device based on a state of change of at least one of: actual transmitted power, from the plurality of traveling wave powers, transmitted from the plurality of power transmission coils to the power reception coil when power transmitted to the plurality of power transmission coils is changed, and reactive power, from the plurality of traveling wave powers, not transmitted from the power transmission coil to the power reception coil when the power transmitted to the plurality of power transmission coils is changed. | 10-09-2014 |
20150115731 | Contactless Power Feeding Apparatus and Contactless Power Feeding System - A contactless power feeding apparatus includes a power source portion, a power feeding coil, and a power feeding apparatus side control portion, and the power feeding apparatus side control portion is configured to perform feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of a coupling coefficient such that power transmission efficiency to a power receiving apparatus including a power receiving coil is in the vicinity of a maximum. | 04-30-2015 |