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Wireless charging systems with in-band communications

A wireless power and wireless transmission technology, applied in transmission systems, data exchange chargers, electrical components, etc., can solve problems such as poor electromagnetic coupling and inability to detect modulated signals

Active Publication Date: 2019-03-01
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the electromagnetic coupling between the wireless power adapter and the wireless power receiving device is poor, the voltage sensing circuit in the wireless power adapter may not be able to detect the modulated signal from the wireless power receiving device

Method used

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  • Wireless charging systems with in-band communications
  • Wireless charging systems with in-band communications
  • Wireless charging systems with in-band communications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0051] According to another embodiment, the method includes powering the control circuit from the capacitor.

[0052] According to another embodiment, transmitting data to the wireless power transfer device with the control circuit includes transmitting data to the wireless power transfer device with the control circuit comprising data bits, wherein each data bit is represented by at least two pulses.

[0053] According to another embodiment, the method includes a wireless power transfer device, whereby wireless power is transferred from the transfer device coil.

[0054] According to another embodiment, the method includes a data receiver in the wireless power transfer device, thereby receiving the transmitted data.

[0055] According to another embodiment, each pulse induces ringing signals in the transmission device coil, and receiving the transmitted data includes detecting these ringing signals.

[0056] According to another embodiment, the wireless power receiving devic...

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PUM

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Abstract

A wireless power transmitting device (12) is disclosed and may have control circuitry that supplies drive signals to a coil (22) to produce wireless power signals (26). The wireless power receiving device (24) may have a coil (28) that receives the transmitted wireless power signals (26) from the wireless power transmitting device (12). The wireless power receiving device (24) may have a rectifier(36) that rectifies signals received by the coil (28) in the wireless power receiving device (24) and that provides a rectified voltage (Vrect) to a capacitor (Cout). A charger (44) in the wireless power receiving device (24) may charge a battery (42) in the device using the rectified voltage (Vrect). When it is desired to convey information to the wireless power transmitting device (12), the wireless power transmitting device (12) may cease the transmission of wireless power and the wireless power receiving device (24) may modulate transistors (38) in the rectifier (36) to transmit data to the wireless power transmitting device (12).

Description

[0001] This patent application claims priority to U.S. Patent Application No. 15 / 611,622, filed June 1, 2017, and Provisional Patent Application No. 62 / 355,707, filed June 28, 2016, which are hereby incorporated in their entireties by Incorporated herein by reference. technical field [0002] The present invention relates generally to charging systems, and more particularly to systems for charging electronic devices. Background technique [0003] In a wireless charging system, a wireless power adapter may use a coil to wirelessly transfer power to a wireless power receiving device. A wireless power receiving device may have a coil and a rectifier. The coil receives a wirelessly transmitted power signal from the wireless power adapter. The rectifier converts the received signal into direct current (DC) power. [0004] From time to time it may be desirable to transmit data from a wireless power receiving device to a wireless power adapter. So-called in-band communication s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/10H02J50/80
CPCH02J50/80H02J50/10H02J7/00034H04B1/3827H02M3/135
Inventor R·达亚尔裘卫红Z·穆萨欧
Owner APPLE INC