Dual mode wireless power receiver

• US 9,343,929 B2
• Filed: 08/12/2013
• Issued: 05/17/2016
• Est. Priority Date: 08/13/2012
• Status: Active Grant

• Current Assignee: WiPQTUS Inc.
• Original Assignee: WiPQTUS Inc.
• Inventors: Sankar, Ganapathy, Singh, Manjit
• Primary Examiner(s): TAT, BINH C
• Application Number:
  US13/964,310
• Publication Number:
  US 20140159646A1
• Time in Patent Office: 1,009 Days
• Field of Search: 320105-112
• US Class Current: 1/1
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A dual mode wireless power receiver (DMWPR) selectively applying a received power to a load device and utilizing at least a part of the power to power-up, communicate, and charge a secondary wireless power receiver (SWPR) is provided. The DMWPR includes a first circuitry having an impedance network, a switch network, a filter capacitor, and one or more switches, and a second circuitry having a security engine, a control logic circuit, and a modulator/demodulator circuit. The first circuitry receives power in charging mode and transmits power in communication mode. The second circuitry configures the first circuitry to allow receipt and transmission of power, receives and interprets data from SWPR in the identified wireless power protocol, and based on the type of SWPR authenticates, decrypts, and encrypts data transfer between DMWPR and SWPR, and receives and executes on a request from SWPR to perform a function associated with transmitted power.

Claims

1. A dual mode wireless power receiver configured to selectively apply a received power to a load device and utilize at least a part of a stored power to power-up and communicate with a secondary wireless power receiver to cause an action or a transaction or charge a load device of said secondary wireless power receiver, said dual mode wireless power receiver comprising:

a first circuitry comprising;

one of a coil and capacitor electrodes;

an impedance network;

a switch network;

a filter capacitor; and

one or more switches;

a second circuitry comprising;

a security engine configured to authenticate, decrypt, and encrypt a data transfer between said dual mode wireless power receiver and said secondary wireless power receiver;

a control logic circuit; and

a modulator/demodulator circuit;

said first circuitry configured to receive said power from a wireless power transmitter;

said first circuitry, based on an input from said control logic circuit, configured to change impedance of said impedance network and topology of said switch network to obtain a modified form of said received power, and apply said modified form of said received power to said load device;

said first circuitry, based on an input from said control logic circuit, configured to change said topology of said switch network and said impedance of said impedance network to transmit at least part of said stored power to said secondary wireless power receiver to power-up said secondary wireless power receiver;

said second circuitry configured to identify a type of said secondary wireless power receiver and identify a wireless power protocol of said secondary wireless power receiver; and

said second circuitry, on power-up of said secondary wireless power receiver, configured to perform one of;

receiving and interpreting data from said secondary wireless power receiver in said identified wireless power protocol;

providing authentication information to said secondary wireless power receiver to authenticate said dual mode wireless power receiver, receive and interpret said data from said secondary wireless power receiver, and respond with suitable encrypted data to said secondary wireless power receiver in said identified wireless power protocol;

initiating exchange of said authentication information between said dual mode wireless power receiver and said secondary wireless power receiver, to authenticate said dual mode wireless power receiver and said secondary wireless power receiver, receive, decrypt, and interpret said data from said secondary wireless power receiver and respond with said encrypted data to said secondary wireless power receiver in said identified wireless power protocol; and

receiving and interpreting a request from said secondary wireless power receiver and performing a function associated with said transmitted power in conjunction with said first circuitry.

2. The dual mode wireless power receiver of claim 1, wherein said first circuitry is configured as one of an inverter and a rectifier.

3. A method for a dual mode wireless power receiver for communicating and receiving power from a wireless power transmitter and for delivering power and exchanging information with a secondary wireless power receiver to cause one of an action, a transaction and charging a load device of said secondary wireless power receiver, said method comprising:

providing said dual mode wireless power receiver comprising;

a first circuitry comprising an impedance network, a switch network, a filter capacitor, one of a coil and capacitor electrodes, and one or more switches; and

a second circuitry, said second circuitry comprising a security engine and a modulator/demodulator circuit;

configuring said first circuitry to receive said power from said wireless power transmitter;

configuring said first circuitry to change impedance of said impedance network and topology of said switch network to obtain a modified form of said received power and apply said modified form of said received power to said load device;

configuring said first circuitry to change said impedance of said impedance network and said topology of said switch network to transmit at least part of a stored power to said secondary wireless power receiver to power-up said secondary wireless power receiver;

configuring said second circuitry to identify a type of said secondary wireless power receiver and a wireless power protocol of said secondary wireless power receiver;

configuring said security engine to authenticate, decrypt, and encrypt a data transfer between said dual mode wireless power receiver and said secondary wireless power receiver via said identified wireless power protocol; and

configuring said second circuitry for performing one of;

receiving and interpreting data from said secondary wireless power receiver in said identified wireless power protocol;

providing authentication information to said secondary wireless power receiver to authenticate said dual mode wireless power receiver, receive, decrypt, and interpret said data from said secondary wireless power receiver and respond with suitable encrypted data to said secondary wireless power receiver in said identified wireless power protocol;

initiating exchange of said authentication information between said dual mode wireless power receiver and said secondary wireless power receiver, to authenticate said dual mode wireless power receiver and said secondary wireless power receiver, receive, decrypt, and interpret said data from said secondary wireless power receiver and respond with said encrypted data to said secondary wireless power receiver in said identified wireless power protocol; and

receiving and interpreting a request from said secondary wireless power receiver and performing a function associated with said transmitted power in conjunction with said first circuitry.

4. The method of claim 3, further comprising configuring said first circuitry as one of an inverter and a rectifier, and adjusting said impedance of said impedance network in said first circuitry by said dual mode wireless power receiver.

5. The method of claim 3, further comprising maintaining said transmission of said power by said dual mode wireless power receiver when said second circuitry identifies said secondary wireless power receiver of being of a valid type.

6. The method of claim 3, further comprising terminating said transmission of said power by said dual mode wireless power receiver on one of receiving an end of service message and a timeout of a predetermined duration of power transmission time.

7. The method of claim 3, further comprising checking said received data for errors, terminating said transmission of said power on detection of said errors in said received data, reapplying said power, and restarting the process after a brief time delay, by said dual mode wireless power receiver.

8. The method of claim 3, further comprising passing said received data and a completion code to a software application by said dual mode wireless power receiver on said detection of one of an end of service message and a timeout of a predetermined duration of power transmission time.

9. The method of claim 3, further comprising passing said received data and a completion code to a device operating system by said dual mode wireless power receiver on said detection of one of an end of service message and a timeout of a predetermined duration of power transmission time.

10. The method of claim 3, further comprising initiating said power to said secondary wireless power receiver by said dual mode wireless power receiver on command by a user through a hardware switch.

11. The method of claim 3, further comprising initiating said power to said secondary wireless power receiver by said dual mode wireless power receiver on command by a user through a software application.