Data reception apparatus and method, data transmission apparatus, and data communication system using mutual resonance

• US 9,461,713 B2
• Filed: 03/18/2013
• Issued: 10/04/2016
• Est. Priority Date: 07/03/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Ui Kun, Kim, Sang Joon, Yoon, Seung Keun
• Primary Examiner(s): Rivero, Alejandro
• Application Number:
  US13/846,887
• Publication Number:
  US 20140011449A1
• Time in Patent Office: 1,296 Days
• Field of Search: None
• US Class Current: 1/1
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/26 using coils
• 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

A data reception apparatus configured to discharge, prior to receiving data from an energy receiving apparatus, energy stored in a source resonator during a mutual resonance between the source resonator and a target resonator, and demodulate data received from the energy receiving apparatus based on an amount of energy reflected from the target resonator after the energy stored in the source resonator is discharged.

Claims

1. A data reception apparatus comprising:

an energy discharger configured to discharge, prior to the data reception apparatus receiving data from an energy receiving apparatus, energy stored in a source resonator during a mutual resonance between the source resonator and a target resonator; and

a demodulator configured to demodulate data received from the energy receiving apparatus based on an amount of energy transmitted from the target resonator in response to the energy stored in the source resonator being discharged,

wherein the source resonator receives energy from the target resonator based on a mutual resonance that is generated in response to the energy stored in the source resonator being discharged, and

in response to a charge in the target resonator reaching a predetermined value, a switch is turned on to connect a capacitor to the target resonator and charge a resonant frequency of the target resonator, and in response to the charge in the target resonator being less than a predetermined value, the switch is turned off to make the resonant frequency of the target resonator identical to a resonant frequency of the source resonator.

2. The data reception apparatus of claim 1, wherein the energy discharger comprises:

a resistor configured to consume the energy stored in the source resonator; and

a switch configured to electrically connect the resistor to the source resonator.

3. The data reception apparatus of claim 2, wherein the energy discharger further comprises a capacitor configured to change a resonant frequency of the source resonator during discharging of the energy stored in the source resonator through the resistor.

4. The data reception apparatus of claim 1, wherein the demodulator is further configured to determine whether the mutual resonance occurs between the source resonator and the target resonator based on the amount of the transmitted energy, and demodulate the received data based on whether the mutual resonance occurs.

5. The data reception apparatus of claim 1, further comprising:

a measurement unit configured to measure a value of a voltage applied to the source resonator; and

a determination unit configured to determine whether the energy stored in the source resonator is discharged based on the value of the voltage measured by the measurement unit.

6. The data reception apparatus of claim 1, wherein the demodulator comprises a dynamic range controller configured to control a dynamic range of an analog-to-digital converter (ADC) based on a distance between the energy receiving apparatus and an energy transmitting apparatus, the ADC being configured to perform sampling of a waveform of the energy stored in the source resonator.

7. The data reception apparatus of claim 1, wherein the demodulator comprises an amplifier configured to amplify the amount of the energy transmitted from the target resonator to an amount of energy great enough to be demodulated.

8. The data reception apparatus of claim 1, wherein the demodulator demodulates the data based on the amount of the transmitted energy included in the source resonator in response to the energy stored in the source resonator being consumed.

9. A data transmission apparatus comprising:

an energy receiver configured to receive energy through a mutual resonance between a target resonator and a source resonator;

a switch unit that disconnects a first capacitor from the energy receiver during the mutual resonance and connect the first capacitor to the energy receiver in response to a termination of the mutual resonance; and

a modulator configured to modulate data based on an amount of energy transmitted from the target resonator in response to energy stored in the source resonator being discharged,

wherein the target resonator transmits energy to the source resonator based on a mutual resonance that is generated in response to the energy stored in the source resonator being discharged, and in response to the mutual resonance between the target resonator and the source resonator being terminated for a predetermined period of time, the energy stored in the source resonator is discharged, and while the energy in the source resonator is being discharged, a second capacitor is connected to the source resonator to charge a resonant frequency of the source resonator to terminate the mutual resonance.

10. The data transmission apparatus of claim 9, further comprising a controller configured to determine whether to enable the mutual resonance to occur between the target resonator and the source resonator, and control the amount of energy reflected from the target resonator.

11. The data transmission apparatus of claim 10, wherein the controller is further configured to change a resonant frequency of the target resonator.

12. The data transmission apparatus of claim 9, wherein

the power input unit comprises an input voltage and an internal resistor and the power transmitting unit comprises a resistance and an inductance, and

a voltage applied to the capacitor has a value of 0 during a steady state of the source resonator.

13. A data communication system comprising:

a data reception apparatus configured to discharge, prior to receiving data from an energy receiving apparatus, energy stored in a source resonator during a mutual resonance between the source resonator and a target resonator, and demodulate data received from the energy receiving apparatus based on an amount of energy transmitted from the target resonator after the energy stored in the source resonator is discharged; and

a data transmission apparatus configured to receive energy through the mutual resonance, and modulate data based on the amount of energy reflected from the target resonator in response to the energy stored in the source resonator being discharged,

wherein the target resonator transmits energy to the source resonator based on a mutual resonance that is generated in response to the energy stored in the source resonator being discharged, and

in response to a charge in the target resonator reaching a predetermined value, a switch is turned on to connect a capacitor to the target resonator and change a resonant frequency of the target resonator, and in response to the charge in the target resonator being less than a predetermined value, the switch is turned off to make the resonant frequency of the target resonator identical to a resonant frequency of the source resonator.

14. The data communication system of claim 13, wherein the data reception apparatus comprises:

an energy discharger configured to discharge, prior to receiving the data from the energy receiving apparatus, the energy stored in the source resonator through a resistor connected to the source resonator; and

a demodulator configured to demodulate the data received from the energy receiving apparatus based on the amount of the energy transmitted from the target resonator.

15. The data communication system of claim 13, wherein the data transmission apparatus comprises:

a controller configured to determine whether to enable the mutual resonance to occur between the target resonator and the source resonator, and control the amount of energy reflected from the target resonator; and

a modulator configured to modulate data based on the amount of the energy reflected from the target resonator in response to the energy stored in the source resonator being discharged.

16. The data communication apparatus of claim 13, wherein the data reception apparatus turns on a second switch in response to energy stored in the target resonator having a peak value to change the resonant frequency of the target resonator to be different from the resonant frequency of the source resonator and to capture the energy stored in the target resonator.

17. A data reception method comprising:

discharging, prior to receiving data from an energy receiving apparatus, energy stored in a source resonator during a mutual resonance between the source resonator and a target resonator; and

demodulating data received from the energy receiving apparatus based on an amount of energy transmitted from the target resonator in response to the energy stored in the source resonator being discharged,

wherein the data reception method further comprises receiving energy from the target resonator based on a mutual resonance that is generated in response to the energy stored in the source resonator being discharged, and

in response to a charge in the target resonator reaching a predetermined value, a control unit turns on a switch to connect a capacitor to a charging unit and change a resonant frequency of the target resonator, and in response to the charge in the target resonator being less than a predetermined value, the control unit turns off the switch to make the resonant frequency of the target resonator identical to a resonant frequency of the source resonator.

18. The data reception method of claim 17, wherein the discharging comprises:

electrically connecting a resistor to the source resonator using a switch; and

consuming the energy stored in the source resonator using the resistor.

19. The data reception method of claim 18, wherein the discharging further comprises:

connecting a capacitor to the source resonator to change a resonant frequency of the source resonator during discharging of the energy stored in the source resonator through the resistor.

20. The data reception method of claim 17, wherein the demodulating comprises:

determining whether the mutual resonance occurs between the source resonator and the target resonator based on the amount of the transmitted energy; and

demodulating the received data based on whether the mutual resonance occurs.