Apparatus and method for transmitting power and transceiving data using mutual resonance, and apparatus and method for receiving power and transceiving data using mutual resonance

• US 9,391,469 B2
• Filed: 11/06/2013
• Issued: 07/12/2016
• Est. Priority Date: 01/14/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong Zo, Kwon, Sang Wook, Kim, Ki Young, Kim, Nam Yun, Kim, Bong Chul, Park, Yun Kwon, Park, Jae Hyun, Song, Keum Su, Ahn, Chi Hyung, Ryu, Young Ho, Yoon, Chang Wook, Lee, Byoung Hee
• Primary Examiner(s): Rossoshek, Helen
• Application Number:
  US14/073,025
• Publication Number:
  US 20140197783A1
• Time in Patent Office: 979 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: H01F 2038/143 for signals
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: Y02T 90/12 Electric charging stations

Abstract

An apparatus configured to transmit power, and transceive data, using mutual resonance, includes a power transmitter configured to wirelessly transmit power to a device, using a power transmission frequency as a resonant frequency. The apparatus further includes a communication unit configured to transceive data to and from the device, using a communication frequency as a resonant frequency. The apparatus further includes a controller configured to determine a charging state of the device based on the data received from the device, and control an amount of the power based on the charging state.

Claims

1. An apparatus configured to transmit power and data, using mutual resonance, the apparatus comprising:

a power transmitter configured to wirelessly transmit power to a device by using a first frequency, wherein the power transmitter comprises a first source resonator configured to transmit the power to a first target resonator of the device, wherein the first target resonator of the device resonates at the first frequency;

a communication unit configured to transmit data to the device by using a second frequency, based on mutual resonance between the communication unit and the device, wherein the communication unit comprises a second source resonator configured to transmit the data to a second target resonator of the device, wherein the second target resonator of the device resonates at the second frequency, and wherein the second source resonator has an overlapped area with the first source resonator;

a controller configured to determine a charging state of the device, based on the data received from the device, and to control an amount of the power, based on the charging state; and

a filter configured to block a signal of the first frequency or the second frequency, to prevent a magnetic field from being induced between the first source resonator and the second source resonator.

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

a first frequency generating unit configured to generate the first frequency; and

a first power amplifier (PA) configured to amplify an amplitude of a signal with the first frequency;

wherein the first source resonator is further configured to transmit power corresponding to the amplified amplitude, to the first target resonator of the device.

3. The apparatus of claim 1, wherein the communication unit comprises:

a second frequency generating unit configured to generate the second frequency;

a second PA configured to amplify an amplitude of a signal with the second frequency; and

a demodulator configured to demodulate the load-modulated data, based on a variation in the amplitude of the signal with the second frequency, in response to mutual resonance occurring between the second source resonator and the target resonator;

wherein the second source resonator is configured to receive load-modulated data from the second target resonator of the device.

4. The apparatus of claim 3, wherein:

the communication unit further comprises a modulator configured to modulate data by changing a waveform of the signal with the second frequency; and

the second source resonator is configured to transmit the modulated data to the target resonator.

5. The apparatus of claim 1, wherein the second frequency is greater than twice, or less than half, the first frequency.

6. The apparatus of claim 1, wherein:

the first source resonator comprises a higher quality factor than a quality factor of the second source resonator; and

each of the first source resonator and the second source resonator comprises a shape of a loop.

7. The apparatus of claim 6, wherein the second source resonator comprises the same shape of the loop as the shape of the loop of the first source resonator, comprises a same pattern line of the loop as a pattern line of the loop of the first source resonator, and is located within a predetermined distance from the first source resonator.

8. The apparatus of claim 1,

wherein the filter is further configured to block the signal of the first frequency of the first source resonator, to prevent a magnetic field from being induced from the first source resonator to the second source resonator.

9. The apparatus of claim 1,

wherein the filter is further configured to pass the signal of the second frequency of the second source resonator, to prevent a magnetic field from being induced from the first source resonator to the second source resonator.

10. The apparatus of claim 1, wherein:

the controller comprises a detector configured to detect whether or not the device exists, based on whether or not the data is received; and

the controller is configured to control the amount of the power so that wake-up power is transmitted until the device is detected to exist, and charging power is transmitted in response to the device being detected to exist.

11. An apparatus configured to receive power and data, using mutual resonance, the apparatus comprising:

a power receiver configured to wirelessly receive power from a device by using a first frequency, wherein the power receiver comprises a first target resonator configured to receive the power from a first source resonator of the device, wherein the first source resonator of the device resonates at the first frequency;

a communication unit configured to receive data from the device by using a second frequency, based on mutual resonance between the communication unit and the device, wherein the communication unit comprises a second target resonator configured to receive the data from a second source resonator of the device wherein the second source resonator of the device resonates at the second frequency, and wherein the second target resonator has an overlapped area with the first target resonator;

a controller configured to determine a charging state of a load, and determine the data to be transmitted to the device, based on the charging state; and

a filter configured to block a signal of the first frequency or the second frequency, to prevent a magnetic field from being induced between the first target resonator and the second target resonator.

12. The apparatus of claim 11, wherein the power receiver comprises:

a rectifier configured to rectify the power;

a converter configured to convert a voltage level of the rectified power to a voltage level to charge the load; and

a charging unit configured to charge the load by adjusting an amount of power with the converted voltage level, based on the charging state.

13. The apparatus of claim 11, wherein the communication unit comprises:

a modulator configured to perform load modulation on data by changing an impedance of the load, in response to mutual resonance occurring between the second target resonator and the second source resonator.

14. The apparatus of claim 13, wherein:

the second target resonator is configured to receive a communication signal from the second source resonator; and

the communication unit further comprises a demodulator configured to demodulate data, based on a change in a waveform of the communication signal.

15. The apparatus of claim 11, wherein the communication unit is further configured to transmit a charging request of the load to the device, in response to the controller being woken up by the power.

16. The apparatus of claim 11, wherein:

the first target resonator comprises a higher quality factor than a quality factor of the second target resonator; and

each of the first target resonator and the second target resonator comprises a shape of a loop.

17. The apparatus of claim 16, wherein the second target resonator comprises the same shape of the loop as the shape of the loop of the first target resonator, comprises a same pattern line of the loop as a pattern line of the loop of the first target resonator, and is located within a predetermined distance from the first target resonator.

18. The apparatus of claim 16,

wherein the filter is further configured to block the signal of the first frequency of the first target resonator, or pass the signal of the second frequency of the second target resonator, to prevent a magnetic field from being induced from the first target resonator to the second target resonator.

19. A method of transmitting power and data, using mutual resonance, the method comprising:

wirelessly transmitting wake-up power from a first source resonator to a device, by using a first frequency;

transmitting communication power to the device, by using a second source resonator and a second frequency, based on mutual resonance between the communication resonator and the device, wherein the second source resonator has an overlapped area with the first source resonator;

filtering a signal of the first frequency or the second frequency, to prevent a magnetic field from being induced between the first source resonator and the second source resonator;

determining a charging state of the device, based on a change in an amplitude of the transmitted communication power; and

controlling an amount of charging power to be transmitted to the device, using the first frequency, based on the charging state.

20. The method of claim 19, wherein:

the determining of the charging state comprises determining whether or not the device exists, based on the change in the amplitude of the transmitted communication power; and

the method further comprises wirelessly transmitting the charging power from the power transmission resonator to the device, using the first frequency, in response to determining that the device exists.

21. The method of claim 19, wherein:

the determining of the charging state comprises determining whether or not the charging of the device is completed, based on the change in the amplitude of the transmitted communication power; and

the method further comprises interrupting transmission of the charging power to the device, in response to determining that the charging of the device is completed.

22. The method of claim 19, wherein the transmitting of the wake-up power and the transmitting of the communication power is performed in response to a predetermined period of time elapsing.

23. A method comprising:

wirelessly transmitting wake-up power to an apparatus, by using a first source resonator and a first frequency;

wirelessly transmitting communication power to the apparatus, by using a second source resonator and a second frequency, wherein the second source resonator has an overlapped area with the first source resonator;

filtering a signal of the first frequency or the second frequency, to prevent a magnetic field from being induced between the first source resonator and the second source resonator;

determining whether or not data is received from the apparatus; and

wirelessly transmitting charging power to the apparatus, using the first frequency, in response to determining that data is received from the apparatus.

24. The method of claim 23, further comprising:

determining whether or not data, indicating that charging of the apparatus is completed, is received from the apparatus; and

interrupting the transmission of the charging power, in response to determining that data is received from the apparatus, the received data indicating that the charging of the apparatus is completed.