A signal transmission device and a battery monitoring device are provided. The signal transmission device is connected to an operation device including an operation circuit for performing an operation based on a first voltage, a measurement circuit for obtaining measurement data based on the first voltage, and a process control circuit for operating based on a lower voltage and control an operation of the operation circuit based on the measurement data, and transmits and receives signals between the process control circuit and the measurement circuit. The signal transmission device includes a power reception circuit for supplying power from the power transmission circuit to the measurement circuit to acquire measurement data, and a power transmission circuit for transmitting the power from a process control circuit to the power reception circuit to receive the measurement data from the power reception circuit and supply the same to the process control circuit.

A signal transmission device and a battery monitoring device are provided. The signal transmission device is connected to an operation device including an operation circuit for performing an operation based on a first voltage, a measurement circuit for obtaining measurement data based on the first voltage, and a process control circuit for operating based on a lower voltage and control an operation of the operation circuit based on the measurement data, and transmits and receives signals between the process control circuit and the measurement circuit. The signal transmission device includes a power reception circuit for supplying power from the power transmission circuit to the measurement circuit to acquire measurement data, and a power transmission circuit for transmitting the power from a process control circuit to the power reception circuit to receive the measurement data from the power reception circuit and supply the same to the process control circuit.

An HMD includes first and second batteries mounted therein, and includes a plurality of power receivers that receive power from the first and second batteries by wireless transmission, a power supply manager that monitors states of the first and second batteries, a communication interface that performs wireless communication with the first and second batteries, and a plurality of limiters that limit the power received by the plurality of power receivers. A controller causes the limiters to limit power, which is supplied to a load, according to a power use state of the load in the device, and the power supply manager acquires information of remaining power storage amounts of the first and second batteries through the communication interface and displays the acquired information on a display. Therefore, since it is possible to supply power required for driving the device while wearing the HMD, the HMD can be continuously used.

An HMD includes first and second batteries mounted therein, and includes a plurality of power receivers that receive power from the first and second batteries by wireless transmission, a power supply manager that monitors states of the first and second batteries, a communication interface that performs wireless communication with the first and second batteries, and a plurality of limiters that limit the power received by the plurality of power receivers. A controller causes the limiters to limit power, which is supplied to a load, according to a power use state of the load in the device, and the power supply manager acquires information of remaining power storage amounts of the first and second batteries through the communication interface and displays the acquired information on a display. Therefore, since it is possible to supply power required for driving the device while wearing the HMD, the HMD can be continuously used.

A system and method for variable power transfer in an inductive charging or power system. In accordance with an embodiment the system comprises a pad or similar base unit that contains a primary, which creates an alternating magnetic field. A receiver comprises a means for receiving the energy from the alternating magnetic field from the pad and transferring it to a mobile device, battery, or other device. In accordance with various embodiments, additional features can be incorporated into the system to provide greater power transfer efficiency, and to allow the system to be easily modified for applications that have different power requirements. These include variations in the material used to manufacture the primary and/or the receiver coils; modified circuit designs to be used on the primary and/or receiver side; and additional circuits and components that perform specialized tasks, such as mobile device or battery identification, and automatic voltage or power-setting for different devices or batteries.

A system and method for variable power transfer in an inductive charging or power system. In accordance with an embodiment the system comprises a pad or similar base unit that contains a primary, which creates an alternating magnetic field. A receiver comprises a means for receiving the energy from the alternating magnetic field from the pad and transferring it to a mobile device, battery, or other device. In accordance with various embodiments, additional features can be incorporated into the system to provide greater power transfer efficiency, and to allow the system to be easily modified for applications that have different power requirements. These include variations in the material used to manufacture the primary and/or the receiver coils; modified circuit designs to be used on the primary and/or receiver side; and additional circuits and components that perform specialized tasks, such as mobile device or battery identification, and automatic voltage or power-setting for different devices or batteries.

A wireless energy transmitting apparatus includes: a direction-finding and location device configured to determine a position of an energy receiving apparatus based on beacon information of the energy receiving apparatus; an energy generation device configured to generate energy, convert the energy into high-frequency electromagnetic waves having a frequency higher than a predetermined frequency threshold, and transmit the high-frequency electromagnetic waves to the energy receiving apparatus; and a processor configured to control the energy generation device to transmit the high-frequency electromagnetic waves to the energy receiving apparatus based on the position of the energy receiving apparatus. The position of the energy receiving end is determined based on the direction-finding and location device, and the energy generation device is controlled to convert the energy into high-frequency electromagnetic waves having a frequency higher than a predetermined frequency and transmit the same to the energy receiving end.

A receiver for a wireless charging system, capable of receiving power energy using non-contact type magnetic induction, includes a coil capable of receiving the power energy and a part for generating a predetermined output power from the power energy received by the coil, a portable terminal, an NFC coil further provided outside of the coil, and a ferrite sheet further provided at the coil and the NFC coil.

A receiver for a wireless charging system, capable of receiving power energy using non-contact type magnetic induction, includes a coil capable of receiving the power energy and a part for generating a predetermined output power from the power energy received by the coil, a portable terminal, an NFC coil further provided outside of the coil, and a ferrite sheet further provided at the coil and the NFC coil.

An authentication between a wireless charger and a device configured to receive wireless energy from the wireless charger includes establishing a wireless data channel between the wireless charger and the device. An authentication challenge signal is driven onto a transmit charging coil of the wireless charger and a receive charging coil of the device is configured to receive the authentication challenge signal. The device sends an authentication response signal to the wireless charger based at least in part on the authentication challenge signal.