WIRELESS POWER TRANSMITTING DEVICE AND METHOD FOR CONTROLLING THE SAME

• US 20170288738A1
• Filed: 03/30/2017
• Published: 10/05/2017
• Est. Priority Date: 03/31/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Kyung-Woo, SHIN, Jae-Hyuck, LEE, Sang-Wook, LEE, Chong-Min, HAN, Hyo-Seok
• Granted Patent: US 10,056,946 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 7/411 Identification of targets based on measurements of radar reflectivity G01S7/415 takes precedence
• CPC Class Codes: G06Q 20/3278 RFID or NFC payments by means of M-devices
• CPC Class Codes: G07F 15/006 dispensed for the electrical charging of other devices than vehicles
• CPC Class Codes: H02J 13/00028 involving the use of Internet protocols
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 17/101 for measurement of specific parameters of the transmitter or components thereof
• CPC Class Codes: H04B 17/102 Power radiated at antenna
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 4/023 : using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/026 : using orientation information, e.g. compass
• CPC Class Codes: H04W 4/24 : Accounting or billing
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/283 : Power depending on the position of the mobile
• CPC Class Codes: H04W 52/42 : in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 52/52 : using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 50/12 : Billing, invoicing, buying or selling transactions or other related activities, e.g. cost or usage evaluation

Abstract

According to an embodiment a wireless power transmitting device, includes a power transmission antenna including patch antennas to wirelessly transmit power, and communication antennas configured to receive a communication signal from an electronic device. The wireless power transmitting device also includes a processor configured to detect a direction in which the electronic device is positioned based on the communication signal received through the communication antennas and control the power transmission antenna to transmit the power in the detected direction.

Claims

1. A wireless power transmitting device, comprising:

a power transmission antenna comprising patch antennas;

communication antennas; and

a processor configured to;

receive, through the communication antennas, a communication signal from an electronic device,

detect a direction in which the electronic device is positioned based on the communication signal received through the communication antennas, and

control to transmit, through the power transmission antenna, power in the detected direction.

2. The wireless power transmitting device of claim 1, wherein the processor is further configured to determine the direction in which the electronic device is positioned based on at least one of a difference in time of reception of the communication signal at each of the communication antennas and a difference in phase of the communication signal received by each of the communication antennas.

3. The wireless power transmitting device of claim 1, wherein the processor is further configured to control the patch antennas so that sub-radio frequency (RF) waves of a first magnitude constructively interfere with each other in the direction of the electronic device.

4. The wireless power transmitting device of claim 3, wherein the processor is further configured to determine whether or not to adjust a magnitude of the sub-RF waves of the first magnitude based on whether received power-related information in a second communication signal received after the reception of the communication signal meets a preset condition.

5. The wireless power transmitting device of claim 4,

wherein the processor is further configured to control the patch antennas so that the sub-RF waves of a second magnitude constructively interfere with each other in response to the received power-related information failing to meet the preset condition, and

wherein the processor is further configured to determine whether or not to adjust the magnitude of the sub-RF waves of the second magnitude based on whether RX power-related information in a third communication signal received from the electronic device meets the preset condition.

6. The wireless power transmitting device of claim 5, further comprising:

a power source configured to supply the power; and

a power amplifier configured to amplify the power, wherein

the processor changes the magnitude of the sub-RF waves from the first magnitude to the second magnitude by changing an amplification gain of the power amplifier.

7. The wireless power transmitting device of claim 4,

wherein the processor adjusts the power provided to the patch antennas until the received power-related information meets the preset condition, and

wherein the processor is further configured to maintain the magnitude of the power supplied to the patch antennas in response to the received power-related information meeting the preset condition.

8. The wireless power transmitting device of claim 3, wherein the processor is further configured to adjust a phase of the power inputted to each of the patch antennas so that the sub-RF waves of the first magnitude constructively interfere with each other in the detected direction.

9. The wireless power transmitting device of claim 1,

wherein the communication signal comprises at least one of identification information of the electronic device and rated power information about the electronic device, and

wherein the processor is further configured to determine whether to charge the electronic device based on at least one of the identification information of the electronic device and the rated power information about the electronic device.

10. The wireless power transmitting device of claim 3, wherein the processor is further configured to determine to charge the electronic device, detect a movement of the electronic device while charging the electronic device with the sub-RF waves of the first magnitude, changes at least one of a magnitude of the sub-RF waves and the determined direction based on the movement of the electronic device, and control to charge the electronic device.

11. A method to control a wireless power transmitting device, comprising:

receiving a communication signal from an electronic device;

detecting a direction in which the electronic device is positioned based on the communication signal; and

transmitting power wirelessly in the detected direction.

12. The method of claim 11, wherein detecting the direction of the electronic device based on the communication signal comprises determining the direction of the electronic device based on at least one of a difference in time of reception of the communication signal and a difference in phase of the communication signal received by each of communication antennas in the wireless power transmitting device.

13. The method of claim 11, wherein transmitting the power in the detected direction comprises controlling patch antennas in the wireless power transmitting device so that sub-radio frequency (RF) waves of a first magnitude constructively interfere with each other in the direction of the electronic device.

14. The method of claim 13, further comprising:

determining whether to charge the electronic device with the sub-RF waves of the first magnitude depending on whether received (RX) power-related information in a second communication signal received after the reception of the communication signal meets a preset condition.

15. The method of claim 14, further comprising:

controlling the patch antennas so that the sub-RF waves of a second magnitude constructively interfere with each other in response to the received power-related information being determined to fail to meet the preset condition; and

determining whether to charge the electronic device with the sub-RF waves of the second magnitude depending on whether RX power-related information in a third communication signal received from the electronic device meets the preset condition.

16. The method of claim 15, wherein controlling the patch antennas so that the sub-radio frequency (RF) waves of the second magnitude constructively interfere with each other in the determined direction comprises changing a magnitude of the sub-RF waves from the first magnitude to the second magnitude by varying an amplification gain of the power amplifier.

17. The method of claim 14, further comprising:

adjusting the power provided to the patch antennas until the received power-related information meets the preset condition; and

charging the electronic device with the power provided to the patch antennas in response to the received power-related information meeting the preset condition.

18. The method of claim 13, further comprising:

determining to charge the electronic device, detects a movement of the electronic device while charging the electronic device with the sub-RF waves of the first magnitude; and

varying at least one of a magnitude of the sub-RF waves and the determined direction corresponding to the movement of the electronic device, and charges the electronic device.

19. The method of claim 11, further comprising:

receiving another communication signal from another electronic device; and

determining a direction in which the other electronic device is positioned based on at least one of a difference in time of reception and a difference in phase of the other communication signal by each of communication antennas in the wireless power transmitting device from the other electronic device.

20. The method of claim 19, further comprising:

enabling the patch antennas to charge the electronic device during a first period and the patch antennas to charge the other electronic device during a second period.