WIRELESS TRANSMITTING DEVICE FOR WIRELESS CHARGING

• US 20140191714A1
• Filed: 09/24/2013
• Published: 07/10/2014
• Est. Priority Date: 01/04/2013
• Status: Abandoned Application

• Current Assignee: Primax Electronics Limited
• Original Assignee: Primax Electronics Limited
• Inventors: Chiu, Hung-Wei, Lo, Chun-Hao, Ho, Yung-Hsien
• Application Number:
  US14/034,769
• Publication Number:
  US 20140191714A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A wireless transmitting device for wireless charging includes a main body, a first encapsulated transmission coil and a second encapsulated transmission coil. The first encapsulated transmission coil and the second encapsulated transmission coil are disposed in the main body, and the second encapsulated transmission coil is adjacent to the first encapsulated transmission coil. Each of the first encapsulated transmission coil and the second encapsulated transmission coil has a quadrangular winding configuration so that the magnetic flux generated at the short-side section of the first or second encapsulated transmission coil is greater than the magnetic flux generated by an encapsulated transmission coil having a circular winding configuration. Therefore, the wireless charging range of the wireless transmitting device for wireless charging is improved.

Claims

1. A wireless transmitting device for wireless charging by transmitting a power to an encapsulated receiving coil of an electronic device, the wireless transmitting device comprising:

a main body;

a first encapsulated transmission coil disposed in the main body and close to a side of the main body, being selectively conducted to generate an electromagnetic effect and transmit the power to the encapsulated receiving coil in response to the electromagnetic effect;

a second encapsulated transmission coil disposed in the main body and adjacent to the first encapsulated transmission coil, being selectively conducted to generate the electromagnetic effect and transmit the power to the encapsulated receiving coil in response to the electromagnetic effect;

wherein the first encapsulated transmission coil has a quadrangular winding configuration, and the second encapsulated transmission coil has the quadrangular winding configuration.

2. The wireless transmitting device for wireless charging according to claim 1, wherein the first encapsulated transmission coil includes:

a first long-side section disposed close to a side of the main body;

a first short-side section connected to the first long-side section via a first arc section between the first short-side section and the first long-side section;

a second long-side section connected to the first short-side section via a second arc section between the second long-side section and the first short-side section, and close to the second encapsulated transmission coil; and

a second short-side section connected to the second long-side section via a third arc section between the second short-side section and the second long-side section, wherein a fourth arc section is formed between the second short-side section and the first long-side section.

3. The wireless transmitting device for wireless charging according to claim 2, wherein the second encapsulated transmission coil includes:

a third long-side section disposed adjacent to the second long-side section of the first encapsulated transmission coil;

a third short-side section connected to the third long-side section via a fifth arc section between the third short-side section and the third long-side section;

a fourth long-side section connected to the third short-side section via a sixth arc section between the fourth long-side section and the third short-side section;

a fourth short-side section connected to the fourth long-side section via a seventh arc section between the fourth short-side section and the fourth long-side section, wherein an eighth arc section is formed between the fourth short-side section and the third long-side section.

4. The wireless transmitting device for wireless charging according to claim 3, wherein the first long-side section, the second long-side section, the third long-side section and the fourth long-side section are substantially parallel to one another;

the first short-side section, the second short-side section, the third short-side section and the fourth short-side section are substantially parallel to one another;

the first long-side section is substantially perpendicular to the first short-side section;

the second long-side section is substantially perpendicular to the second short-side section;

the third long-side section is substantially perpendicular to the third short-side section; and

the fourth long-side section is substantially perpendicular to the fourth short-side section.

5. The wireless transmitting device for wireless charging according to claim 1, further comprising a detection module disposed in the main body for detecting whether the electronic device has been placed on the main body or not, and detecting which of the first encapsulated transmission coil and the second encapsulated transmission coil is approached by the electronic device;

wherein if it is determined by the detection module that the electronic device is not disposed on the main body, the detection of the disposition of the electronic device on the main body continues; and

if it is determined by the detection module that the electronic device has been disposed on the main body, which of the first encapsulated transmission coil and the second encapsulated transmission coil is approached by the electronic device is determined.

6. The wireless transmitting device for wireless charging according to claim 5, wherein if it is determined by the detection module that the electronic device has been disposed on the main body, and the electronic device approaches the first encapsulated transmission coil, the first encapsulated transmission coil is electrically conducted and generates and outputs the power to the encapsulated receiving coil;

and if it is determined by the detection module that the electronic device has been disposed on the main body, and the electronic device approaches the second encapsulated transmission coil, the second encapsulated transmission coil is electrically conducted and generates and outputs the power to the encapsulated receiving coil.

7. The wireless transmitting device for wireless charging according to claim 1, further comprising:

a power cable connected to a power supply and exposed from the main body; and

a power module connected to the power cable, the first encapsulated transmission coil and the second encapsulated transmission coil, and driven by the power supply to generate a current, which flows through a selected one of the encapsulated transmission coils, thereby causing an electromagnetic effect and generating the power in response to the electromagnetic effect.

8. The wireless transmitting device for wireless charging according to claim 1, wherein the power is transmitted from the first encapsulated transmission coil or the second encapsulated transmission coil to the electronic device comprising the encapsulated receiving coil and further comprising:

an electronic device housing enclosing the encapsulated receiving coil, wherein when the electronic device housing approaches the main body or contact with the main body, the encapsulated receiving coil disposed in the electronic device housing receives the power from the first encapsulated transmission coil or the power the second encapsulated transmission coil; and

a rechargeable cell disposed in the electronic device housing and connected to the encapsulated receiving coil for storing the power received by the encapsulated receiving coil.

9. The wireless transmitting device for wireless charging according to claim 1, wherein the power is transmitted from the first encapsulated transmission coil or the second encapsulated transmission coil to the electronic device comprising the encapsulated receiving coil and further comprising:

an electronic device housing;

a protection cover enclosing the electronic device housing for protecting the electronic device housing, wherein the encapsulated receiving coil is disposed inside the protection cover, and wherein when the protection cover approaches the main body or contact with the main body, the encapsulated receiving coil disposed in the protection cover receives the power from the first encapsulated transmission coil or the power the second encapsulated transmission coil; and

a rechargeable cell disposed in the electronic device housing and connected to the encapsulated receiving coil via the protection cover for storing the power received by the encapsulated receiving coil.

10. The wireless transmitting device for wireless charging according to claim 1, wherein the power is transmitted from the first encapsulated transmission coil or the second encapsulated transmission coil to the electronic device comprising the encapsulated receiving coil having a circular configuration.