WIRELESS CHARGER AUTHENTICATION SYSTEM AND METHOD THEREOF

• US 20100270969A1
• Filed: 08/14/2009
• Published: 10/28/2010
• Est. Priority Date: 04/28/2009
• Status: Active Grant

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: Sip, Kim-Yeung
• Granted Patent: US 8,248,026 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source

Abstract

A wireless charger authentication system includes an electronic device and a wireless charger. The electronic device includes an emitting module configured for producing an unauthenticated signal and a modulating module configured for modulating the unauthenticated signal into a high-frequency signal. The wireless charger includes a source signal produced by a power supply, a mixing module, an analyzing module, a comparing module and a triggering module. The mixing module is configured for mixing the high-frequency signal and the source signal to get a recognized signal. The analyzing module is configured for analyzing the parameters of the recognized signal. The comparing module predetermines a number of preset parameter values and is configured for comparing the parameters with the preset parameter values. The triggering module is configured for triggering the wireless charger to charge the electronic device if the parameters of the recognized signal are substantially equal to the preset parameter values.

Claims

1. A wireless charger authentication system comprising:

an electronic device comprising;

an emitting module configured for producing an unauthenticated signal;

a modulating module configured for modulating the unauthenticated signal into a high-frequency signal; and

a wireless charger receiving the high-frequency signal and comprising;

a source signal produced by a power supply;

a mixing module configured for mixing the high-frequency signal and the source signal to get a recognized signal;

an analyzing module configured for analyzing the parameters of the recognized signal;

a comparing module having a plurality of preset parameter values therein and configured for comparing the parameters of the recognized signal with the preset parameter values; and

a triggering module configured for triggering the wireless charger to charge the electronic device if the parameters of the recognized signal are substantially equal to the preset parameter values.

2. The wireless charger authentication system in claim 1, wherein the wireless charger comprises a primary coil, while the electronic device comprises a secondary coil electromagnetically coupled to the primary coil when the wireless charger charges the electronic device.

3. The wireless charger authentication system in claim 1, wherein the unauthenticated signal is a digital signal.

4. The wireless charger authentication system in claim 1, wherein the unauthenticated signal is produced by transforming a specific code of the electronic device, the specific code is a serial number of the electronic device which can be read by inputting “

*#06#”

with a keyboard.

5. The wireless charger authentication system in claim 1, wherein the modulating module is a QPSK.

6. The wireless charger authentication system in claim 1, wherein the high-frequency signal comprises a plurality of periodic impulse signals.

7. The wireless charger authentication system in claim 1, wherein the source signal is a low-frequency signal.

8. The wireless charger authentication system in claim 1, wherein the recognized signal is a periodic signal.

9. The wireless charger authentication system in claim 8, wherein the parameter comprises an amplitude and a frequency of the recognized signal.

10. The wireless charger authentication system in claim 9, wherein the preset parameter values comprise a preset amplitude value and a preset frequency value, the comparing module respectively compares the amplitude and the frequency of the recognized signal with the corresponding preset amplitude value and the corresponding preset frequency value.

11. The wireless charger authentication system in claim 1, wherein when the parameters of the recognized signal are different from the preset parameter values, the wireless charger does not charge the electronic device.

12. The wireless charger authentication system in claim 2, wherein the triggering module comprises a controller connected to the primary coil via a variable resistance for increasing or decreasing the current of the primary coil to determine whether the wireless charger is to charge the electronic device or not, and the controller can receive a signal from the comparing module.

13. The wireless charger authentication system in claim 12, wherein when the parameters of the recognized signal are substantially equal to the preset parameter values, the controller controls the variable resistance to increase the current of the primary coil, thus the electronic device can be charged by the wireless charger.

14. The wireless charger authentication system in claim 12, wherein when the parameters of the recognized signal are different from the preset parameter values, the controller controls the variable resistance to decrease the current of the primary coil.

15. The wireless charger authentication system in claim 1, further comprises a plurality of first holding coils connected to a direct current power supply and a plurality of second holding coils electromagnetically coupled to the corresponding first holding coils.

16. The wireless charger authentication system in claim 15, wherein the first holding coils are disposed around the primary coil, while the second holding coils are disposed around the secondary coil.

17. The wireless charger authentication system in claim 15, wherein the high-frequency signal is transmitted to the wireless charger by one of the first coils and one of the corresponding second coils to be authenticated.

18. A wireless charger authentication method comprising the steps of:

modulating an unauthenticated signal into a high-frequency signal and transmitting the high-frequency signal to the wireless charger;

providing a source signal and mixing the high-frequency signal and the source signal to get a recognized signal;

analyzing the parameters of the recognized signal;

predetermining a plurality of preset parameter values and comparing the parameters of the recognized signal with the preset parameter values;

triggering the wireless charger to charge the electronic device when the parameters of the recognized signal substantially equal to the preset parameter values.

19. The wireless charger authentication method in claim 18, wherein the parameters of the recognized signal comprises an amplitude and a frequency, the preset parameter values comprise a preset amplitude value and a preset frequency value, and the method further comprises:

respectively comparing the amplitude and frequency of the recognized signal with the preset amplitude value and the preset frequency value in the comparing step.

20. The wireless charger authentication method in claim 18, wherein if the parameters of the recognized signal are different from the preset parameter values, the wireless charger does not charge the electronic device.