339results about "Near-field systems with structural receiver" patented technology

A Bluetooth device comprises a Bluetooth module in charge of wireless transmission, a loudspeaking module in charge of playing an acoustical signal received by the Bluetooth module, a processing unitcapable of controlling the Bluetooth device to be switched to energy saving state and an active state judging unit; wherein the active state judging unit is provided with an induction component and asensing circuit electrically connected with the induction component, the sensing circuit is used for sensing variation of one characteristic value of the induction component and outputting an energy saving instruction to the processing unit corresponding to the variation of the characteristic value, thus the processing unit can control the Bluetooth device to be switched to the energy saving state.

Frequency conversion methods and systems for a transceiver for Bluetooth and near field communication. NFC data may be received and / or transmitted via the NFC radio and Bluetooth data may be received and / or transmitted via the Bluetooth radio. With an integration of frequency conversion for Bluetooth and NFC, both systems may operate from a single frequency source, thereby reducing part count and power consumption. Communication between Bluetooth and NFC channels may be enabled via a single chip.

The invention discloses a multifunctional light-emitting diode (LED) device and a multifunctional loud speaker box system. The multifunctional LED device comprises an LED drive and power supply unit, a controller unit, an audio power amplifier unit, a loudspeaker unit, a wireless receiving and dispatching module and an LED light source assembly. The wireless receiving and dispatching module keeps in communication with a smart terminal, as well as communicates with other LED devices. The multifunctional loud speaker box system comprises a plurality of multifunctional LED devices and a smart terminal, wherein the smart terminal is capable of communicating with each multifunctional LED device, every two multifunctional LED devices are capable of communicating with each other, two multifunctional LED devices form a 2.0 sound track, and a 2.1 sound track, a 5.1 sound track or a 7.1 sound and the like can be configured as needed by adding configuration number of multifunctional LED devices. With no need in changing current arrangement of wire and without any additional equipment such as a wireless audio transmission studio camera, a remote control or a peripheral dimmer switch, the multifunctional LED device and the multifunctional loud speaker box system are convenient to use, support wireless dimmer and supply everyday illumination.

A parametric loudspeaker system and method for reducing distortion in a decoupled audio wave by creating a double sideband parametric ultrasonic signal that substantially approximates a non-square-rooted modulation envelope and emitting a parametric ultrasonic wave that corresponds to the double sideband parametric ultrasonic signal from a parametric loudspeaker at a sufficient amplitude to drive the surrounding air into saturation.

The present invention relates to secure paring of electronically controlled devices configured to communicate with each other. A medical system is provided comprising a first unit and a second unit, the system comprising a first communication link allowing a first group of data types to be transmitted between the first unit and the second unit, and a second communication link allowing a second group of data types to be transmitted between the first unit and the second unit. Different properties of the communication links may be used to ensure that certain data, e.g. during pairing of the two devices, can be transmitted in a more controlled way whereas other data can be transmitted in a less controlled way.

A magnetic induction system is disclosed, which has antenna diversity at the transmitter side, but which does not require a bidirectional link to pass information regarding received signal quality back to the transmitter. The system uses a time division multiplexing access (TDMA) arrangement, to transmit the same, or correlated, information with a level of redundancy, from two, or more, antenna to at least a receiver. The or each receiver is configured to determine a received signal quality from the channel received from one antenna, and, in response to inadequate signal quality, to switch to another antenna.A receiver, and a transmitter for such a magnetic induction system are also disclosed, as is an associated method.A non-limiting application of such a system is in binaural hearing aids, in which antenna diversity is preferred at the transmitter because of space limitations.

A receiving antenna circuit is arranged in a reactive near-field of a modulated magnetic induction signal and forms a narrow band-pass filter. The output of the antenna circuit is not subjected to any frequency translation prior to digitizing, and the signal may nevertheless be digitized with low resolution, which radically reduces the power consumption of the receiving circuits. The reduction in power consumption is of several orders of magnitude, which allows implementation of such receiving circuits in battery-driven devices such as hearing devices without substantially affecting the battery life.