SYSTEMS, METHODS, AND DEVICES FOR WIRELESS CHARGING

• US 20150380974A1
• Filed: 09/26/2014
• Published: 12/31/2015
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Qinghua Li, Xintian Lin
• Inventors: LIN, Xintian, LI, Qinghua
• Granted Patent: US 10,630,108 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Embodiments relating to systems, methods, and devices for wireless charging are disclosed. In some embodiments, methods for establishing a communication link between a power transmitting unit (PTU) and a power receiving unit (PRU) through a low energy wireless communication interface are described.

Claims

1. An apparatus comprising:

circuitry for a power transmitting unit (PTU) capable of inductively or wirelessly transferring power to one or more power receiving units (PRUs);

a receiving component for execution by the circuitry to receive an advertisement (ADV) packet with a forward signaling support bit and an empty ID field from a first PRU;

a detecting component to detect the ADV and determine a message transmission time; and

a modulation component to transmit an encoded message on wireless power after a predetermined timing delay;

wherein the receiving component receives an ADV with forward signaling support bit and an ID extracted from the ADV; and

the detecting component detects the ADV with a matching ID and sends a connection request to the first PRU.

2. The apparatus of claim 1, wherein the message is modulated using binary phase shift keying (BPSK).

3. The apparatus of claim 2, wherein the message is further modulated using differential modulation or differential CDMA/convolutional code modulation.

4. The apparatus of claim 3, wherein a magnitude of the message is about 10% or less than that of a charging signal.

5. The apparatus of claim 3, wherein the modulation is a fixed voltage swing.

6. A method of communication between a power transmitting unit (PTU) capable of inductively or wirelessly transferring power to one or more power receiving units (PRUs), the method comprising the steps of:

a first PRU sending an advertisement packet (ADV) with a forward signaling support bit and an empty ID field;

a first PTU detecting the ADV and determining a message transmission time;

the first PTU starting a power modulation after a predetermined timing delay;

the first PRU decoding a message sent by the first PTU;

the first PRU sending an ADV with forward signaling support bit and an ID extracted from the message; and

the first PTU detecting the ADV with a matching ID and sending a connection request to the first PRU.

7. The method of claim 6, wherein the message is modulated using binary phase shift keying (BPSK).

8. The method of claim 7, wherein the message is further modulated using differential modulation or differential CDMA/convolutional code modulation.

9. The method of claim 8, wherein a magnitude of the message is about 10% or less than that of a charging signal.

10. The method of claim 8, wherein the modulation is a fixed voltage swing.

11. A machine readable medium comprising a plurality of instructions that in response to being executed by circuitry for a power transmitting unit (PTU) capable of inductively or wirelessly transferring power to one or more power receiving units (PRUs) causes the circuitry to:

receive an advertisement (ADV) packet with a forward signaling support bit and an empty ID field from a first PRU;

detect the ADV and determine a message transmission time;

start a power modulation after a predetermined timing delay;

transmit an encoded message to the first PRU;

receive an ADV with forward signaling support bit and an ID extracted from the first PRU; and

detect the ADV with a matching ID for sending a connection request to the first PRU.

12. The machine readable medium of claim 11, wherein the message is modulated using binary phase shift keying (BPSK).

13. The machine readable medium of claim 12, wherein the message is further modulated using differential modulation or differential CDMA/convolutional code modulation.

14. The machine readable medium of claim 13, wherein a magnitude of the message is about 10% or less than that of a charging signal.

15. The machine readable medium of claim 13, wherein the modulation is a fixed voltage swing.

16. An apparatus comprising:

circuitry for a power receiving unit (PRU) to inductively or wirelessly receiving power from a power transmitting unit (PTU);

a sending component for execution by the circuitry to send an advertisement (ADV) packet with a forward signaling support bit and an empty ID field to a PTU;

a receiving component to receive an encoded message from the PTU;

wherein the sending component sends an ADV with forward signaling support bit and an ID extracted from the message; and

the PTU detects the ADV with a matching ID and sends a connection request to the PRU.

17. The apparatus of claim 16, wherein the message is modulated by the PTU using binary phase shift keying (BPSK).

18. The apparatus of claim 17, wherein the message is further modulated by the PTU using differential modulation or differential CDMA/convolutional code modulation.

19. The apparatus of claim 18, wherein a magnitude of the message is about 10% or less than that of a charging signal.

20. The apparatus of claim 18, wherein the modulation is a fixed voltage swing.

21. A machine readable medium comprising a plurality of instructions that in response to being executed by circuitry for a power receiving unit (PRU) causes the circuitry to:

send an advertisement (ADV) packet with a forward signaling support bit and an empty ID field to a power transmitting unit (PTU);

receive an encoded message from the PTU;

decode the encoded message and extract an ID in the encoded message; and

send an ADV with forward signaling support bit and an ID extracted from the message,

wherein the PTU detects the ADV with a matching ID and sends a connection request to the PRU.

22. The machine readable medium of claim 21, wherein the message is modulated by the PTU using binary phase shift keying (BPSK).

23. The machine readable medium of claim 22, wherein the message is further modulated by the PTU using differential modulation or differential CDMA/convolutional code modulation.

24. The machine readable medium of claim 23, wherein a magnitude of the message is about 10% or less than that of a charging signal.

25. The machine readable medium of claim 23, wherein the modulation is a fixed voltage swing.