Apparatus for controlling resonance frequency of device subject to wireless power transmission interference and method thereof

• US 9,480,145 B2
• Filed: 09/12/2013
• Issued: 10/25/2016
• Est. Priority Date: 09/12/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yoon, Chang Wook, Kwon, Sang Wook, Kim, Nam Yun, Kim, Dong Zo, Park, Yun Kwon
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): YESHAW, ESAYAS G
• Application Number:
  US14/024,867
• Publication Number:
  US 20140071644A1
• Time in Patent Office: 1,139 Days
• Field of Search: 307/104
• US Class Current: 1/1
• CPC Class Codes: H05K 1/0216 Reduction of cross-talk, noise or electromagnetic interference grounding H05K1/0215
• CPC Class Codes: H05K 1/0231 Capacitors or dielectric substances
• CPC Class Codes: H05K 1/0243 Printed circuits associated with mounted high frequency components
• CPC Class Codes: H05K 1/0262 Arrangements for regulating voltages or for using plural voltages
• CPC Class Codes: H05K 2201/10053 Switch
• CPC Class Codes: H05K 2201/10098 Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
• CPC Class Codes: H05K 2201/10151 Sensor
• CPC Class Codes: H05K 2201/10196 Variable component, e.g. variable resistor

Abstract

Provided is an apparatus and method to control a resonance frequency of a device subject to wireless power transmission interference. The apparatus and method include supplying power from a printed circuit board (PCB) to an integrated circuit (IC) during exposure to a wireless power transmission environment experiencing mutual resonance. The apparatus and method also include a resonance frequency of the PCB based on a change in the supply of power.

Claims

1. An apparatus to control a device, the apparatus comprising:

a printed circuit board (PCB) configured to supply power to an integrated circuit (IC) during exposure to a wireless power transmission environment; and

a resonance frequency control unit configured to control a resonance frequency of the PCB based on the supply of power,

wherein the controlled resonance frequency is different from a frequency used to transmit or receive a wireless power.

2. The apparatus of claim 1, wherein the PCB comprises:

a power plane configured to supply power from a power source to the IC through a printed path on the PCB; and

a ground plane configured to ground the power source and the IC.

3. The apparatus of claim 1, wherein the resonance frequency control unit comprises:

a measuring unit configured to measure an amount of power supplied to the IC;

a determining unit configured to determine whether the amount of power is within a range; and

a detecting unit configured to detect wireless power transmission interference having mutual resonance when the amount of power measured is outside the range.

4. The apparatus of claim 3, wherein the detecting unit is configured to detect a malfunction in the IC.

5. The apparatus of claim 2, wherein the PCB comprises a variable capacitor operatively connected between the power plane and the ground plane, and

the resonance frequency control unit comprises a capacitor capacity determining unit configured to determine a capacity of the variable capacitor based on the change in the supply of power.

6. The apparatus of claim 5, wherein the capacitor capacity determining unit is configured to decrease the capacity of the variable capacitor to increase the resonance frequency of the PCB to be higher than a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance.

7. The apparatus of claim 5, wherein the capacitor capacity determining unit is configured to increase the capacity of the variable capacitor to decrease the resonance frequency of the PCB to be lower than a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance.

8. The apparatus of claim 1, wherein the resonance frequency control unit is configured to control the resonance frequency of the PCB to a frequency, irrespective of the change in the supply of power from the PCB.

9. The apparatus of claim 2, wherein the IC chip is supplied with power from the power source through a conduit operatively connecting the power plane to the ground plane.

10. The apparatus of claim 2, wherein the PCB comprises capacitors operatively connected between the power plane and the ground plane, and

the resonance frequency control unit comprises a switch control unit configured to control a switch to increase the resonance frequency of the PCB to be higher than a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance, the switch being configured to operatively connect the capacitors to the power plane and the ground plane.

11. The apparatus of claim 1, wherein the switch control unit is configured to operatively connect the plurality of capacitors to the power plane and the ground plane in parallel and controlling a switch to reduce the resonance frequency of the PCB to be lower than a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance.

12. The apparatus of claim 1, further comprising:

a communication unit configured to transmit and receive information associated with a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance and information associated with the resonance frequency of the PCB to and from the wireless power transmission apparatus.

13. A method of controlling a device, the method comprising:

supplying power from a printed circuit board (PCB) to an integrated circuit (IC) during exposure to a wireless power transmission environment; and

controlling a resonance frequency of the PCB based on the supply of power,

wherein the controlled resonance frequency is different from a frequency used to transmit or receive a wireless power.

14. The method of claim 13, wherein the controlling comprises:

measuring an amount of power supplied to the IC;

determining whether the amount of power measured is within a range; and

detecting wireless power transmission interference having mutual resonance when the amount of power measured is outside the range.

15. The method of claim 14, wherein the PCB comprises a variable capacitor configured to change the resonance frequency of the PCB, and

the controlling further comprises determining a capacity of the variable capacitor based on the change in the supply of power from the PCB when the wireless power transmission interference having mutual resonance is detected.

16. The method of claim 14, wherein the PCB comprises capacitors configured to change the resonance frequency of the PCB, and

the controlling further comprises operatively connecting the capacitors to the PCB in a connection configuration of a series connection and a parallel connection when the wireless power transmission interference having mutual resonance is detected.

17. The method of claim 13, further comprising:

transmitting and receiving information associated with a resonance frequency of a wireless power transmission apparatus experiencing mutual resonance and information associated with a resonance frequency of the PCB to and from the wireless power transmission apparatus experiencing mutual resonance.

18. An apparatus to control a device subject to wireless power transmission interference, comprising:

a variable capacitor configured to adjust a capacity of a printed circuit board (PCB) and enable the PCB to supply power to an integrated circuit (IC); and

a resonance frequency control unit configured to control a resonance frequency of the PCB by adjusting the capacity of the variable capacitor based on the power supplied to the IC,

wherein the controlled resonance frequency is different from a frequency used to transmit or receive a wireless power.

19. The apparatus of claim 18, wherein the resonance frequency control unit changes the capacity of the variable capacitor when wireless power transmission interference with mutual resonance is detected between the device and the PCB or when the IC malfunctions.

20. The apparatus of claim 18, wherein the resonance frequency control unit changes the resonance frequency of the PCB when a value of electric current input to the IC or a value of voltage applied to the IC is outside a range.

21. The apparatus of claim 18, wherein the variable capacitor is integrated into the PCB, operatively connected between a power plane and a ground plane of the PCB.

22. The apparatus of claim 18, wherein the resonance frequency control unit determines a larger capacity of the variable capacitor as the change in power being supplied is larger and when a change in the resonance frequency of the PCB is greater.

23. The apparatus of claim 18, wherein the resonance frequency control unit determines a lower capacity of the variable capacitor as the change in a supply of power decreases and when a change in the resonance frequency of the PCB is lower.

24. The apparatus of claim 18, wherein the resonance frequency control unit calculates an amount of power supplied to the IC periodically or irregularly in real-time.