The present disclosure provides a terminal device and a protective shell, and belongs to the technical field of communication. The terminal device includes a body, a first coil, a second coil and a shielding member. The body includes a rear shell. The first coil is located in the body. The second coil is located in the body and close to one side of the rear shell, and the second coil at least partially overlaps the first coil. The shielding member covers the sides, far away from the rear shell, of the first coil and the second coil, and is located outside an overlapping portion of the first coil and the second coil, and the first coil is unshielded from the second coil.

A wireless power transfer system includes a power transmitter (201) arranged to provide a power transfer to a power receiver (205) via a power transfer signal. The power receiver (205) comprises a first mode controller (709) for transmitting a standby mode exit request to the power transmitter (201) by changing a loading of a communication inductor (209) of the power transmitter (201). The power transmitter (201) comprises a mode controller (405) which controls the power transmitter (201) to operate in a standby mode wherein a presence of the power receiver (205) is detected but no power transfer signal is generated. It furthermore comprises a detector (403) for detecting an impedance change of the communication inductor (209). The mode controller (405) is arranged to initiate a transition from the standby mode to a power transfer mode in response to the detector (403) detecting the impedance change.

Provided is a display device that ensures both of the conductivity for realizing the antenna function and the light transmissivity for transmitting light that forms a video image displayed on the display device, and at the same, allows short-range wireless communication to be performed in a wide range in a display section of the display device. A display device 100 includes a display panel 3, an antenna pattern 4 for driving, and antenna patterns 5A, 5B for propagation. The antenna driving unit drives the antenna pattern 4 for driving, at predetermined carrier wave frequency, whereby the antenna pattern 4 for driving and the antenna pattern 5A or 5B for propagation are electromagnetically coupled. As a result, proximity wireless communication can be performed in a wide range of a display area AR1 of the display device 100.

An unwanted process is prevented from being performed due to near field communication based on a process performed via an antenna which is not intended by a user. An information processing apparatus (1) includes a communication antenna determination unit (22) configured to, when a proximity state of an NFC terminal (10) to an NFC antenna (12) continues, determines that the NFC antenna (12) is an NFC antenna (12) that performs near field communication for executing a prescribed process.

Provided are a wireless power transmission device and a wireless power transmission system. The wireless power transmission device, according to one embodiment of the present invention, may comprise: a dipole coil comprising a core, and a conducting wire wound at the center part of the core; a power unit for supplying a current to the conducting wire; and a canceling coil for canceling a magnetic field radiated from a lateral surface of the dipole coil.

A resonant circuit dynamic optimization system is described herein that can exhibit improved system charging functionality, can have multi-input charging functionality, and can improve the efficiency and speed of charging electronic devices. The resonant circuit dynamic optimization system can comprise at least one antenna configured to receive or transmit an electromagnetic signal, at least one variable component, and at least one dynamic adjustment circuit. The dynamic adjustment circuit can adjust the variable component to thereby modify the power transfer efficiency of the electromagnetic signal.

A wireless communication apparatus which comprises: a shared antenna shared for communication and power reception; an impedance matching circuit connected to the shared antenna and having a first switch element; a communication circuit connected to the impedance matching circuit; a second switch element connected to the first switch element; and an impedance matching adjustment circuit configured to switch an on/off state of each of the first switch element and the second switch element at the time of communication and at the time of power reception.

An example electronic device includes a first antenna; a second antenna; a driver integrated circuit (IC) configured to transmit magnetic field signal through at least one of the first antenna and the second antenna; a switch configured to switch between short-circuiting connection between the driver IC and the first antenna and opening connection between the driver IC and the first antenna; and a filter configured to filter a pre-determined frequency and connected to the first antenna, the second antenna and the driver IC. The driver IC is configured to transmit the magnetic field signal using both the first antenna and the second antenna based on the switch short-circuiting the connection between the driver IC and the first antenna.

A power receiving system includes a first receiving coil, a second receiving coil, a receiving circuit, a switching circuit, and a shorting circuit. The first receiving coil is at a first location on the cart. The second receiving coil is at a second location different from the first location on the cart. The receiving circuit generates direct current (DC) power from the power received by the first receiving coil or the second receiving coil. The switching circuit connects one of the first and second receiving coils to the receiving circuit. The shorting circuit disables the other one of the first and second receiving coils.

An antenna device for use with a wireless power charging operation and a near-field communication (NFC) operation is formed sets of electrically conductive loops. The sets include a first set of loops configured to form a NFC antenna and a second set of loops. The first and second sets of loops together are configured to form a wireless power charging antenna.