WIRELESS CHARGER AND CHARGING METHOD

• US 20140285159A1
• Filed: 02/27/2014
• Published: 09/25/2014
• Est. Priority Date: 03/19/2013
• Status: Active Grant

• Current Assignee: Mobile Drive Netherlands BV
• Original Assignee: FIH (Hong Kong) Limited (Hon Hai Precision Industry Co., Ltd.)
• Inventors: WANG, CHUN-NAN
• Granted Patent: US 9,537,345 B2
• Time in Patent Office: Days
• US Class Current: 320/162
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

A wireless charger charges an electronic device. The wireless charger receives radio frequency (RF) from a wireless power transmitter and generates alternating current (AC) electricity. The wireless charger coverts the AC electricity to direct current (DC) electricity and charges the electronic device using the DC electricity.

Claims

1. A wireless charger, comprising:

a RF conversion unit that receives radio frequency (RF) from a wireless power transmitter wirelessly connected to the wireless charger and generates alternating current (AC) electricity; and

a voltage conversion unit that is connected to the RF conversion unit and coverts the AC electricity to direct current (DC) electricity and charges an electronic device using the DC electricity, and the electronic device being wired to connect to the wireless charger.

2. The wireless charger of claim 1, wherein the voltage conversion unit stops charging the electronic device when a built-in battery of the electronic device is full.

3. The wireless charger of claim 2, wherein the voltage conversion unit obtains a battery voltage of the built-in battery from the electronic device and determines that the built-in battery of the electronic device is full, under the condition that the battery voltage is equal to a specified value required by the electronic device.

4. The wireless charger of claim 2, wherein the voltage conversion unit requests the RF conversion unit to stop generating the AC electricity when the built-in battery of the electronic device is full.

5. The wireless charger of claim 1, wherein the voltage conversion unit comprises a rectifier and converts the AC electricity to the DC electricity using the rectifier.

6. The wireless charger of claim 1, wherein the RF conversion unit comprises an induction coil and generates the AC electricity using the induction coil.

7. The wireless charger of claim 1, wherein the voltage conversion unit controls a voltage of the DC electricity to be equal to a charging voltage required by the electronic device.

8. The wireless charger of claim 1, wherein the wireless charger further comprises:

a switch device, a voltage sensor and an interface, the switch device comprising a first switch and a second switch;

the voltage sensor being connected to the RF conversion unit, the switch device and the interface;

the voltage conversion unit being connected to the first switch;

the interface being connected to the second switch and a wired charger; and

both of the first switch and the second switch being connected to the electronic device.

9. The wireless charger of claim 8, wherein the voltage sensor controls the first switch to turn off and controls the second switch to turn on, and the wired charger charges the electronic device.

10. The wireless charger of claim 8, wherein the voltage sensor controls the first switch to turn on and controls the second switch to turn off, and the wireless charger charges the electronic device.

11. A computer-based data charging method by a wireless charger, the method comprising:

a RF conversion unit of the wireless charger that receives radio frequency (RF) from a wireless power transmitter wirelessly connected to the wireless charger and generates alternating current (AC) electricity; and

a voltage conversion unit of the wireless charger that is connected to the RF conversion unit and coverts the AC electricity to direct current (DC) electricity and charges an electronic device using the DC electricity, and the electronic device being wired to connect to the wireless charger.

12. The method of claim 11, wherein the voltage conversion unit stops charging the electronic device when a built-in battery of the electronic device is full.

13. The method of claim 12, wherein the voltage conversion unit obtains a battery voltage of the built-in battery from the electronic device and determines that the built-in battery of the electronic device is full, under the condition that the battery voltage is equal to a specified value required by the electronic device.

14. The method of claim 12, wherein the voltage conversion unit requests the RF conversion unit to stop generating the AC electricity when the built-in battery of the electronic device is full.

15. The method of claim 11, wherein the voltage conversion unit comprises a rectifier and converts the AC electricity to the DC electricity using the rectifier.

16. The method of claim 11, wherein the RF conversion unit comprises an induction coil and generates the AC electricity using the induction coil.

17. The method of claim 11, wherein the voltage conversion unit controls a voltage of the DC electricity to be equal to a charging voltage required by the electronic device

18. The method of claim 17, wherein the wireless charger further comprises:

a switch device, a voltage sensor and an interface, the switch device comprising a first switch and a second switch;

the voltage sensor being connected to the RF conversion unit, the switch device and the interface;

the voltage conversion unit being connected to the first switch;

the interface being connected to the second switch and a wired charger; and

both of the first switch and the second switch being connected to the electronic device.

19. The method of claim 18, wherein the voltage sensor controls the first switch to turn off and controls the second switch to turn on, and the wired charger charges electronic device.

20. The method of claim 18, wherein the voltage sensor controls the first switch to turn on and controls the second switch to turn off, and the wireless charger charges the electronic device.