WIRELESS CHARGING TRANSMITTER AND METHOD THEREOF

• US 20160118836A1
• Filed: 10/28/2014
• Published: 04/28/2016
• Est. Priority Date: 10/28/2014
• Status: Active Grant

• Current Assignee: Lite-On Technology Corporation
• Original Assignee: Lite-On Technology Corporation
• Inventors: WALDSCHMIDT, Andre
• Granted Patent: US 9,837,847 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01Q 15/24 Polarising devices; Polarisation filters H01Q15/12, H01Q15/22 take precedence
• CPC Class Codes: H01Q 19/28 using a secondary device in the form of two or more substantially straight conductive elements log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10
• CPC Class Codes: H01Q 21/062 using dipole aerials; H01Q21/067, H01Q21/068 take precedence
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• 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 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A wireless charging transmitter is provided for charging an electronic device having a receiver coil. The wireless charging transmitter includes a charging module, including a transmitter coil electromagnetically coupled to the receiver coil, and a comb-shaped combination of shielding and planar dipole antenna array. The comb-shaped combination of shielding and planar dipole antenna array includes a plurality of dipole antennas; each of the dipole antennas includes a plurality of comb-like antenna portions.

Claims

1. A wireless charging transmitter for charging an electronic device having a receiver coil, comprising:

a charging module, comprising a transmitter coil electromagnetically coupled to the receiver coil, and a comb-shaped combination of shielding and planar dipole antenna array;

wherein the comb-shaped combination of shielding and planar dipole antenna array includes a plurality of dipole antennas, and each of the dipole antennas includes a plurality of comb-like antenna portions.

2. The wireless charging transmitter as claimed in claim 1, wherein each of the antenna portions includes a comb base, and a plurality of parallel tracks connected to the comb base.

3. The wireless charging transmitter as claimed in claim 2, wherein:

the electric field transmitted from the transmitter coil is shielded by the comb-shaped combination of shielding and planar dipole antenna array in the charging mode;

the comb-shaped combination of shielding and planar dipole antenna array enables the transmitter coil to be inductive magnetic coupled to the receiver coil; and

the magnetic field emission from the transmitter coil crosses through the comb-shaped combination of shielding and planar dipole antenna array.

4. The wireless charging transmitter of claim 1, wherein

a mobile communication signal transmitted from the electronic device is received by the comb-shaped combination of shielding and planar dipole antenna array;

and

in pinging, a modulation information from the electronic device is demodulated by the wireless charging transmitter and thus the wireless charging transmitter demodulates the modulation information to determine whether the electronic device is to be charged by the wireless charging transmitter.

5. A wireless charging method applicable to a wireless charging transmitter, the wireless charging method including:

wireless coupling a comb-shaped combination of shielding and planar dipole antenna array of the wireless charging transmitter to an antenna of the electronic device for receiving a mobile communication signal from the electronic device; and

wireless charging the electronic device by a transmitter coil of the wireless charging transmitter;

wherein the comb-shaped combination of shielding and planar dipole antenna array includes a plurality of dipole antennas, and each of the dipole antennas includes a plurality of comb-like antenna portions.

6. The wireless charging method of claim 5, wherein each of the antenna portions includes a comb base, and a plurality of parallel tracks connected to the comb base.

7. The wireless charging method of claim 6, further comprising:

shielding electric fields transmitted from the transmitter coil of the wireless charging transmitter by the comb-shaped combination of shielding and planar dipole antenna array in the charging mode;

enabling the transmitter coil to be inductive magnetic coupled to a receiver coil of the electronic device; and

crossing magnetic fields from the transmitter coil through the comb-shaped combination of shielding and planar dipole antenna array.

8. The wireless charging method of claim 5, wherein

receiving a mobile communication signal transmitted from the electronic device by the comb-shaped combination of shielding and planar dipole antenna array;

and

in pinging, demodulating a modulation information from the electronic device to determine whether the electronic device is to be charged by the wireless charging transmitter.