Koninklijke Philips Corporation N.v.

Henricus Antonius Gerardus Van Vugt

Wilhelmus Gerardus Maria Ettes

Eddy Gerrit Veltman

Pascal Leonard Maria Theodoor Lebens

Bastiaan De Groot

Raj Dayal Natarajan

Joseph Henricus Gerardus Rous

A power transmitter () provides wireless power transfer to a power receiver () via a wireless inductive power transfer signal. The power transmitter () comprises transmitter coil () for generating the power transfer signal and a driver () generating a drive signal for this. A communicator () communicates with the power receiver () via a communication channel that does not use the power transfer signal as a communication carrier. A power loop controller () implements a power control loop by adapting a power level of the power transfer signal in response to power control error messages received from the power receiver (). A generator () introduces a power level variation sequence to the power transfer signal and a validity detector () detects data received by the communicator () to be invalid data for the power transfer in response to a comparison of the power level variation sequence and power change requests of the power control error messages.

Power transmitter, system and method therefor

A power transfer device is a power transmitter () or a power receiver () conducting power transfer using an electromagnetic power transfer signal employing a repeating time frame comprising a power transfer time interval and an object detection time interval. A power transfer circuit () comprises a power transfer coil () receiving or generating the power transfer signal during the power transfer time intervals. A communicator () communicates with the other device via an electromagnetic communication signal. A communication resonance circuit () comprises a communication antenna () for transmitting or receiving the electromagnetic communication signal. During the communication, the communication resonance circuit () provides a resonance at a first resonance frequency to the communicator (). A controller () adapts the communication resonance circuit to not provide the resonance at the first resonance frequency to the communicator during object detection time intervals. The approach may provide improved detection of resonance objects, such as smart cards (e.g. NFC cards).

Device and method for wireless power transfer

A self-powered sensor device () is provided which comprises a wireless network unit () configured to enable a communication in a Low-Power Wide-Area Network (LPWAN), an energy converting unit () configured to convert a first physical quantity into energy, and an energy harvesting unit () configured to harvest energy from the energy converted by the energy converting unit (), and to initiate a sending of a message via the wireless network unit () every time a predetermined amount of energy is harvested by the energy harvesting unit ().

Self-powered Internet-of-Things sensor device

In one embodiment there is provided an ambient lighting control systemcomprising a controller () and a sensor node (). The sensor node () comprises an arrangement including a light energy collecting element () such as a solar cell, an energy storage element () and a transmitter (). The collecting element () charges the storage element (). The transmitter () is arranged to transmit signals to the controller () using energy stored by the energy storage element (), wherein the number of signals provided during a time interval to the controller () is proportional to a light intensity at the light energy collecting element (). The controller () may thus output a control signal C for controlling an amount of ambient lighting, wherein the control signal is based on the determined number of received signals.

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Heldmond, Netherlands

Henricus Antonius Gerardus Van Vugt