Mobile terminal and coil antenna module

• US 10,148,001 B2
• Filed: 07/13/2017
• Issued: 12/04/2018
• Est. Priority Date: 03/04/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Kiwon, Kim, Youngtae, Lee, Gwanghoon
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US15/649,278
• Publication Number:
  US 20170317405A1
• Time in Patent Office: 509 Days
• Field of Search: None
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H04B 1/3888 Arrangements for carrying or protecting transceivers
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• 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

There is disclosed a mobile terminal including a first case comprising a battery loading portion, a battery loaded in the battery loading portion, a second case coupled to the first case and configured to cover the battery, a coil antenna module arranged between the second case and the battery, and a controller electrically connected to the coil antenna module and configured to transmit and receive a signal or receive an electric power, wherein the coil antenna module includes an insulating sheet, a first coil arranged in a surface of the insulating sheet, a second coil arranged in the first coil, a third coil arranged in the second coil, and a magnetic sheet disposed on the surface of the insulating sheet, and ends of the first, second and third coils are arranged in the surface of the insulating sheet or dividedly arranged in both surfaces of the insulating sheet. The mobile terminal may realize the coil antenna module including a plurality of coils configured to perform diverse manners of wireless communication in a limited area.

Claims

1. A mobile terminal comprising:

a first case comprising a battery loading portion;

a battery positioned in the battery loading portion;

a second case coupled to the first case and positioned over the battery;

a switch;

a coil antenna module positioned between the second case and the battery,

wherein the coil antenna module comprises;

an insulating sheet;

a first coil, a second coil, and a third coil, each positioned on the insulating sheet;

a magnetic sheet positioned over the first coil, the second coil, and the third coil; and

a controller electrically coupled to the coil antenna module and configured to;

provide a near field communication (NFC) function using the first coil;

automatically charge the battery using the third coil when the mobile terminal is placed at a wireless charging device, wherein during the automatically charge of the battery, the switch is open preventing the second coil to connect to a payment module;

cause the switch to close to connect the second coil to the payment module according to a payment function;

transmit a payment signal by the second coil after the switch is closed;

provide the NFC function with a frequency band of 13.56 MHz or more;

provide the payment function with a frequency band of 100 kHz or less; and

provide the automatically charge of the battery with a frequency band from 100 kHz to 300 kHz.

2. The mobile terminal of claim 1, wherein the controller comprises a frequency matching circuit connected to ends of the first coil, the second coil, and the third coil.

3. The mobile terminal of claim 1, wherein at least one of the first coil, the second coil, or the third coil comprises a predetermined portion positioned at one surface of the insulating sheet and another portion positioned at an other surface of the insulating sheet, and

the predetermined portion positioned at the one surface and the another portion positioned at the other surface of the insulating sheet are connected with each other via a via hole formed within the insulating sheet.

4. The mobile terminal of claim 1, wherein the magnetic sheet covers at least one of the first coil, the second coil, or the third coil, and does not cover ends of the first coil, the second coil, or the third coil.

5. The mobile terminal of claim 1, wherein a number of windings of the third coil is larger than a number of windings of the first coil and is larger than a number of windings of the second coil.

6. The mobile terminal of claim 5, wherein the third coil is disposed within the first coil.

7. The mobile terminal of claim 1, wherein the NFC function is independent of the automatically charge of the battery, and when the switch is open the second coil does not affect the automatically charge of the battery.

8. The mobile terminal of claim 1, wherein at least one of the first coil, the second coil, or the third coil is disposed within at least one of the first coil, the second coil, or the third coil.

9. A mobile terminal comprising:

a first case comprising a battery loading portion;

a battery positioned in the battery loading portion;

a second case coupled to the first case and positioned over the battery;

a coil antenna module positioned between the second case and the battery,

wherein the coil antenna module comprises;

an insulating sheet;

a first coil, a second coil, and a third coil, each positioned on the insulating sheet;

a magnetic sheet disposed over the first coil, the second coil and the third coil, and

a controller electrically coupled to the coil antenna module and configured to;

provide a near field communication (NFC) function using the first coil with a frequency band of 13.56 Mhz;

provide a payment function using the second coil with a frequency band of 100 kHz or less;

provide a wireless battery charging function using the third coil with a frequency band of 100 kHz to 300 kHz when the mobile terminal is placed at a wireless charging device; and

cause the second coil to not connect to the payment function while the battery is charged via the wireless battery charging function.

10. The mobile terminal of claim 9, wherein the controller comprises a frequency matching circuit connected to ends of the first coil, the second coil, and the third coil.

11. The mobile terminal of claim 9, wherein at least one of the first coil, the second coil, or the third coil comprises a predetermined portion positioned at one surface of the insulating sheet and another portion positioned at an other surface of the insulating sheet, and

the predetermined portion positioned at the one surface and the another portion positioned at the other surface of the insulating sheet are connected with each other via a via hole formed within the insulating sheet.

12. The mobile terminal of claim 9, wherein the magnetic sheet covers at least one of the first coil, the second coil, or the third coil, and does not cover ends of the first coil, the second coil, or the third coil.

13. The mobile terminal of claim 9, wherein a number of windings of the third coil is larger than a number of windings of the first coil and is larger than a number of windings of the second coil.

14. The mobile terminal of claim 13, wherein the third coil is disposed within the first coil.

15. The mobile terminal of claim 9, wherein the NFC function is independent of the wireless battery charging function, and when a switch is open the second coil does not affect the wireless battery charging function.

16. The mobile terminal of claim 9, wherein at least one of the first coil, the second coil, or the third coil is disposed within at least one of the first coil, the second coil, or the third coil.

17. A mobile terminal comprising:

a first case comprising a battery loading portion;

a battery positioned in the battery loading portion;

a second case coupled to the first case and positioned over the battery;

a coil antenna module positioned between the second case and the battery,

wherein the coil antenna module comprises;

an insulating sheet;

a first coil positioned on the insulating sheet;

an integrated coil positioned on the insulating sheet;

a magnetic sheet disposed over the first coil and the integrated coil, and

a controller electrically coupled to the coil antenna module and configured to;

provide a near field communication (NFC) function using the first coil with a frequency band of 13.56 Mhz;

provide a wireless battery charging function using a first part of the integrated coil with a frequency band of 100 kHz to 300 kHz when the mobile terminal is placed at a wireless charging device;

provide a payment function using a second part of the integrated coil with a frequency band of 100 kHz or less; and

wherein the payment function depends on the wireless battery charging function.

18. The mobile terminal of claim 17, wherein the controller comprises a frequency matching circuit connected to ends of the first coil, the first part, and the second part.

19. The mobile terminal of claim 17, further comprising:

a switch; and

wherein during the provide the wireless battery charging function, the switch is open preventing the provide the payment function; and

wherein the controller is further configured to;

cause the switch to close to allow the perform the payment function.

20. The mobile terminal of claim 19, wherein the NFC function is independent of the wireless battery charging function, and when the switch is open the second part does not affect the wireless battery charging function.

21. The mobile terminal of claim 17, wherein at least one of the first part or the second part comprises a predetermined portion positioned at one surface of the insulating sheet and another portion positioned at an other surface of the insulating sheet, and

the predetermined portion positioned at the one surface and the another portion positioned at the other surface of the insulating sheet are connected with each other via a via hole formed within the insulating sheet.

22. The mobile terminal of claim 17, wherein the magnetic sheet covers at least one of the first part or the second part, and does not cover ends of the first part or the second part.

23. The mobile terminal of claim 17, wherein a number of windings of the first part is larger than a number of windings of the first coil and is larger than a number of windings of the second part.

24. The mobile terminal of claim 23, wherein the first part is disposed within the first coil.

25. The mobile terminal of claim 17, wherein at least one of the first coil, the first part, or the second part, is disposed within at least one of the first coil, the first part, or the second part.