Wireless charger for electronic device

• US 9,667,085 B2
• Filed: 06/17/2014
• Issued: 05/30/2017
• Est. Priority Date: 06/19/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Arkhipenkov, Vladimir Yakovlevich, Khripkov, Alexander Nikolaevich, Kim, Joon-Il, Pavlov, Konstantin Alexandrovich, Makurin, Mikhail Nikolaevich, Olyunin, Nikolay Nikolaevich
• Primary Examiner(s): Alam, Mohammed
• Application Number:
  US14/307,013
• Publication Number:
  US 20140375258A1
• Time in Patent Office: 1,078 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless charger for an electronic device is provided, which includes one or more charge cells formed by one or more structures of transmitting inductance coils, each of the charge cells receiving an electronic device, and an electric power supply circuit of transmitting coils. The transmitting coils surround the charge cells on at least two sides, respectively, and generate a uniformly distributed magnetic field such that the magnetic fields, generated by currents in parts of the structure of the transmitting coils, are mutually subtracted out of the charge cells and summarized inside the charge cell in an area in which the electronic device for reception of energy is located.

Claims

1. A wireless charger for an electronic device, comprising:

one or more charge chambers, the one or more charge chambers including an opening receiving an electronic device and transmitting coils disposed adjacent to the opening; and

an electric power supply circuit supplying power to the transmitting coils,

wherein the transmitting coils at least partially enclose a circumference of the opening and are configured such that;

outside of the charge chambers, a magnetic field generated by one of the transmitting coils is subtracted or canceled by another magnetic field generated by another of the transmitting coils, and

inside the charge chambers, the magnetic fields generated by the one and the another of the transmitting coils are concentrated in the opening which the electronic device for reception of energy is located,

wherein the transmitting coils have a structure of charging and/or providing electrical power to each respective electronic device randomly and three-dimensionally oriented in each of the charge chambers, by generating the magnetic field, and

wherein distribution of the magnetic field is determined by secondary induced currents on metal surfaces of the electronic device according to a position and the three-dimensional orientation of the electronic device inside each of the charge chambers.

2. The wireless charger as in claim 1, wherein the electric power supply circuit performs a matching of an impedance of a set of the structure of the transmitting coils and distributes the electric power to the set of the structure of the transmitting coils, the electric power supply circuit including:

an electric power supply unit;

a radio frequency power generator which generates an alternative current, and supplies the electric power to an input of a matching unit of the transmitting coils;

the matching unit of the transmitting coils, which matches an impedance of outputs of the radio frequency power generator and each transmitting coil; and

a switch which connects each matching unit of the transmitting coils with a corresponding structure of the transmitting coils.

3. The wireless charger as in claim 2, wherein outputs of the radio-frequency power generator are connected to inputs of the matching unit of the transmitting coils.

4. The wireless charger as in claim 1, wherein the electronic device comprises:

another electric power supply circuit

receiving inductance coils corresponding to at least one of the transmitting coils,

another matching unit providing a matching of impedance between the electronic device and an input of a rectifier;

the rectifier, of which an output is connected to an input of the another matching unit;

a feed regulator which executes a current regulation of the rectifier for providing a charging mode required to charge a rechargeable accumulator; and

the rechargeable accumulator.

5. The wireless charger as in claim 1, further comprising an automatic detection device for detecting a presence or an absence of the electronic device in at least one of the charge chambers based on a status change of the electric power supply circuit of the transmitting coils or a sensor.

6. The wireless charger as in claim 1, wherein the wireless charger is connected with each electronic device for data transmission using a data transmission scheme including Radio Frequency Identification (RFID), Near Field Communication (NFC), Bluetooth, Bluetooth Low-Energy (BLE), Zig-Bee, 2.4 GHz Ant+or any other information transmission modes.

7. The wireless charger as in claim 6, wherein the wireless charger and each electronic device comprise at least one antenna, which transmits information about the presence of the electronic device, identification data thereof, and device charging requirements including a charging mode.

8. The wireless charger as in claim 7, wherein the at least one antenna includes a first antenna integrated with the transmitting coils, and a second antenna integrated with a receiving coil of each electronic device.

9. The wireless charger as in claim 1, further comprising a shield structure surrounding a set of the structure of the transmitting coils, the shield structure providing suppression of spurious radiation and an electromagnetic compatibility.

10. The wireless charger as in claim 9 wherein a surface of the shield structure includes a ferrite thin film, an artificial magnetic and conductive material, an electric and conductive material, and combinations thereof.

11. The wireless charger as in claim 9, wherein the shield structure protects the electronic device from foreign substances including dust and moisture.

12. The wireless charger as in claim 9, wherein a module supporting one or more charge chambers is connected to an additional module so as to simultaneously charge a large number of the electronic devices.

13. The wireless charger as in claim 12, wherein the connected modules support the charging of the electronic devices with different energy consumption capabilities.

14. The wireless charger as in claim 1, further comprising an ultra-violet radiation source in one or several charge chambers for disinfection of the electronic devices during wireless charging.

15. The wireless charger as in claim 1, further comprising an air humidity control equipment.

16. The wireless charger as in claim 1, further comprising a voice and/or visual output unit which provides a user with information including the status of each electronic device, time and status of the process of charging of an accumulator, and received calls and messages.

17. The wireless charger as in claim 1, further comprising at least one of a switch and a touch pad, wherein at least one of the switch and the touch pad is operated by a touch of a user.