Wireless power transmitting device, electronic device for wirelessly receiving power and operation method thereof

Patent metadata

Field	Value
Publication number	US-10938241-B2
Application number	US-201815950828-A
Country	US
Kind code	B2
Filing date	Apr 11, 2018
Priority date	Apr 12, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A wireless power transmitting device according to an embodiment may include a power transmission circuit and a processor. The processor may be configured to control the power transmission circuit to wirelessly transmit power to a first area around the wireless power transmitting device, perform a predetermined first operation when an obstacle is detected in a second area around the first area, and perform a predetermined second operation when it is detected that the obstacle has entered the first area.

First claim

What is claimed is:

1. A wireless power transmitting device comprising:
a power transmission circuit; and
a processor,
wherein the processor is configured to:
control the power transmission circuit to wirelessly transmit first power with a first level for a first location of a first area around the wireless power transmitting device and to wirelessly transmit second power with a second level for a second location of a second area adjacent to the first area,
wherein the first level is greater than the second level,
based on detecting an obstacle in the second area while wirelessly transmitting the first power with the first level to an electronic device in the first area, decrease a level of the first power from the first level to a third level, and
based on detecting that the obstacle enters the first area from the second area while wirelessly transmitting the first power with the third level to the electronic device in the first area, decrease a level of the first power from the third level to a fourth level.

2. The wireless power transmitting device of claim 1 , further comprising a communication circuit,
wherein the processor is further configured to:
control the communication circuit to transmit a communication signal during a first time period,
receive a reflected wave created by reflection of the communication signal, through the communication circuit during a second time period, and
detect the obstacle in at least one of the first area or the second area based on the received reflected wave.

3. The wireless power transmitting device of claim 2 , wherein the processor is further configured to detect the obstacle based on at least one of an amplitude, a phase, or a time of flight of the received reflected wave.

4. The wireless power transmitting device of claim 3 , wherein the processor is further configured to compare at least one of the amplitude, the phase, or the time of flight of the received reflective wave with a predetermined threshold value and to determine whether the obstacle is detected in the first area or the second area based on a result of the comparing.

5. The wireless power transmitting device of claim 4 , further comprising a communication circuit, and
wherein the processor is further configured to:
control the communication circuit to transmit a message for instructing to reduce required power of the electronic device before decreasing the level of the first power.

6. The wireless power transmitting device of claim 1 , wherein the processor is further configured to obtain an image of at least one of the first area or the second area and to detect the obstacle based on the obtained image.

7. The wireless power transmitting device of claim 6 , wherein the processor is further configured to:
determine at least one of a possibility that the obstacle enters the first area, estimated time of stay of the obstacle in the first area, or a movement pattern of the obstacle in the first area, based on the obtained image; and
perform a predetermined operation in accordance with a result of the determining.

8. The wireless power transmitting device of claim 1 , wherein the processor is further configured to:
based on detecting the obstacle in the second area, determine a transmission path of the first power that is transmitted through the power transmission circuit based on a location of the obstacle, and
based on detecting the obstacle in the first area, control the power transmission circuit to transmit the first power on the determined transmission path.

9. The wireless power transmitting device of claim 8 , wherein the power transmission circuit includes a plurality of coils, and
wherein the processor is configured to:
based on detecting the obstacle in the second area, activate a first portion of the plurality of coils and deactivate a second portion of the plurality of coils based on the location of the obstacle; and
based on detecting the obstacle in the first area, control the power transmission circuit to transmit the first power on the transmission path by applying a current to the first portion of the plurality of coils without applying the current to the second portion of the plurality of coils.

10. The wireless power transmitting device of claim 8 , wherein the power transmission circuit includes a plurality of patch antennas, and
wherein the processor is further configured to:
based on the obstacle not being detected, control at least one of a phase or an amplitude of electrical signals that are input to the patch antennas to wirelessly transmit the first power on the first transmission path based on a location of an electronic device;
based on detecting the obstacle in the second area, determine at least one of the phase or the amplitude of the electrical signals that are input to the patch antennas to wirelessly transmit the first power on a second transmission path different from the first transmission path based on the location of the obstacle and the location of the electronic device; and
based on detecting the obstacle in the second area, control at least one of the phase or the amplitude of the electrical signals that are input to the patch antennas based on a result of the determining to wirelessly transmit the first power on the second transmission path.

11. The wireless power transmitting device of claim 1 , wherein the processor is further configured to:
based on detecting the obstacle in a third area positioned opposite of the first area from the second area, perform a predetermined operation.

12. The wireless power transmitting device of claim 1 , wherein the processor is further configured to:
obtain state information of an electronic device wirelessly receiving and using the first power; and
designate the first area and the second area based on the obtained state information.

13. The wireless power transmitting device of claim 1 , further comprising a media data transmitting device,
wherein the processor is further configured to:
control the media data transmitting device to transmit media data for a fourth area around the wireless power transmitting device;
based on detecting the obstacle in a fifth area around the fourth area, perform a predetermined first operation; and
based on detecting the obstacle in the fourth area, perform a predetermined second operation.

14. The wireless power transmitting device of claim 13 , wherein the processor is further configured to:
based on detecting the obstacle in any one of the fourth area and the fifth area, adjust at least one of a beam-forming condition of the media data, a transmission frequency of the media data, a compression rate of the media data, a number of frames of the media data, or a playback speed of the media data.

15. The wireless power transmitting device of claim 14 , wherein the processor is further configured to:
based on detecting the obstacle in the fifth area, determine estimated time of stay of the obstacle in the fourth area; and
adjust at least one of the beam-forming condition of the media data, the transmission frequency of the media data, the compression rate of the media data, the number of frames of the media data, or the playback speed of the media data further based on the estimated time of stay.

16. The wireless power transmitting device of claim 14 , wherein the processor is further configured to:
based on detecting the obstacle in the fifth area, determine a movement pattern of the obstacle in the fourth area; and
adjust at least one of the beam-forming condition of the media data, the transmission frequency of the media da

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Jae-Seok
• Ryu Young-Ho
• Kim Chang-Hyun
• Kim Myung-Ho
• Choi Woong-Il

Classifications

• H02J2105/46

  Medical devices, medical implants or life supporting devices · CPC title

• H02J2105/44

  Portable electronic devices · CPC title

• H04N21/4436

  Power management, e.g. shutting down unused components of the receiver (power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418) · CPC title

• H04N21/47217

  for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks (specific graphical features in visual interfaces H04N21/4312) · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title