Mobile terminal

• US 10,128,915 B2
• Filed: 12/13/2017
• Issued: 11/13/2018
• Est. Priority Date: 03/03/2016
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Jaehyun, Choi, Hyengcheul, Choi, Deuksu, Kim, Dongjin, You, Chisang
• Primary Examiner(s): Le, Nhan
• Application Number:
  US15/841,093
• Publication Number:
  US 20180109295A1
• Time in Patent Office: 335 Days
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• 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: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

There is disclosed a mobile terminal including a housing comprising a first metal case, a second metal case and a first non-conductive case arranged between the first metal case and the second metal case, a battery embedded in the housing, a first coil arranged in an area covered by the first metal case inside the housing, a main board comprising a charging module implemented to recharge the battery using electric currents which flow in the first coil, and a first resonator arranged in an area covered by the first non-conductive case and comprising a first matching circuit corresponding to a first frequency, such that the examples of the mobile terminal in accordance with the present disclosure may enhance performance of the wireless communication unit and wireless charging performance, without design change of the housing having the metal case.

Claims

1. A mobile terminal comprising:

a housing comprising a first metal case, a second metal case, and a first non-conductive case that is located between the first metal case and the second metal case;

a battery located in the housing;

a first coil located in the housing and located at an area covered by the first metal case;

a main board comprising a charging module configured to recharge the battery using electric current that flows in the first coil; and

a first resonator located at an area covered by the first non-conductive case.

2. The mobile terminal of claim 1, wherein:

the first metal case and the second metal case are positioned to form a slit therebetween;

the first non-conductive case is located in the slit; and

the first resonator is extended along the slit.

3. The mobile terminal of claim 1, wherein both ends of the first resonator are connected to the first metal case.

4. The mobile terminal of claim 3, wherein the main board is electrically insulated from the first metal case.

5. The mobile terminal of claim 1, wherein:

the main board comprises a ground electrically connected to the first metal case; and

at least one end of the first resonator is connected to the main board.

6. The mobile terminal of claim 1, further comprising:

a first matching circuit corresponding to a first frequency; and

a second coil located in the housing and configured to perform short range wireless communication using a signal having a second frequency.

7. The mobile terminal of claim 6, wherein the second coil is located at a position corresponding to the second metal case.

8. The mobile terminal of claim 6, further comprising:

a second resonator located at an area covered by the first non-conductive case, the second resonator comprising a second matching circuit corresponding to the second frequency.

9. The mobile terminal of claim 8, wherein:

the second resonator further comprises a third matching circuit corresponding to the first frequency; and

the mobile terminal further comprises a controller configured to cause the second resonator to be;

connected to the second matching circuit to perform the short range wireless communication; and

connected to the third matching circuit to recharge the battery.

10. The mobile terminal of claim 6, wherein the first resonator comprises:

a second matching circuit corresponding to the second frequency; and

a switch configured to be selectively connected to the first matching circuit or the second matching circuit,

wherein the mobile terminal further comprises a controller configured to cause the switch to;

connect the first resonator to the first matching circuit to recharge the battery; and

connect the first resonator to the second matching circuit to perform the short range wireless communication.

11. The mobile terminal of claim 10, further comprising:

a second resonator located at an area covered by the first non-conductive case and comprising a third matching circuit corresponding to the second frequency,

wherein;

the second resonator further comprises a switch configured to be selectively connected to the first metal case or the second metal case; and

the mobile terminal further comprises a controller configured to cause the second resonator to be;

connected to the first metal case to perform the short range wireless communication; and

connected to the second resonator to recharge the battery.

12. The mobile terminal of claim 6, wherein:

the second metal case is located at a first area of the first metal case;

the first coil and the second coil are located at a position corresponding to the first metal case; and

the mobile terminal further comprises;

a third metal case located at a second area of the first metal case;

a second non-conductive case located between the first metal case and the third metal case; and

a second resonator located at a position corresponding to the second non-conductive case.

13. The mobile terminal of claim 10, wherein the first matching circuit and the second matching circuit comprise one or more capacitors.