WIRELESS POWER TRANSMITTER AND WIRELESS POWER RECEIVER

• US 20160226299A1
• Filed: 01/28/2016
• Published: 08/04/2016
• Est. Priority Date: 01/30/2015
• Status: Abandoned Application

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: NAM, Isaac, OH, Soon Tack, KIM, Si Hyung, SUNG, Jae Suk, CHANG, Ki Won, PARK, Chul Gyun, KANG, Chang Soo, KIM, Ji Hoon
• Application Number:
  US15/009,075
• Publication Number:
  US 20160226299A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A wireless power transmitter includes a controller configured to output a control signal in response to detected light, and a power transmitting circuit which is configured to wirelessly radiate power in response to the control signal.

Claims

1. A wireless power transmitter comprising:

a controller configured to output a control signal in response to detected light; and

,

a power transmitting circuit configured to wirelessly radiate power in response to the control signal.

2. The wireless power transmitter of claim 1, further comprising a case providing an internal space accommodating the wireless power receiver therein and having the controller and the power transmitting circuit mounted thereon.

3. The wireless power transmitter of claim 2, wherein the power transmitting circuit is configured to wirelessly supply the power when the case is closed and blocks supply of the power when the case is open.

4. The wireless power transmitter of claim 2, further comprising an opening and closing detector comprising at least one terminal opened or short-circuited depending on whether the case is respectively open or closed.

5. The wireless power transmitter of claim 4, wherein the controller is configured to output the control signal depending on states of the at least one terminal of the opening and closing detector.

6. The wireless power transmitter of claim 2, further comprising a sensor configured to output a sensing signal depending on whether the case is open or closed.

7. The wireless power transmitter of claim 6, wherein the controller is configured to output the control signal in response to detected light, the sensing signal, or combinations thereof.

8. The wireless power transmitter of claim 1, wherein the controller comprises:

a detector configured to output a detection signal depending on an intensity of received light; and

a control signal generator configured to output the control signal in response to the detection signal.

9. The wireless power transmitter of claim 8, wherein the detector comprises:

a first voltage generator configured to receive power and to responsively output a first voltage;

a second voltage generator configured to receive the power and to responsively output a second voltage varied depending on the intensity of received light; and

a comparator circuit configured to compare the first voltage and the second voltage with each other and responsive to the comparison, to output the detection signal.

10. The wireless power transmitter of claim 9, wherein the second voltage generator comprises:

a resistor connected to a terminal to which the power is input; and

a light detecting resistor (LDR) connected between the resistor and a ground and configured to establish a resistance value varied depending on the intensity of received light.

11. The wireless power transmitter of claim 10, wherein the resistor is a variable resistor configured to have a resistance value varied in response to an adjustment signal input from an external source.

12. The wireless power transmitter of claim 1, further comprising a power supply configured to supply the power to the controller and the power transmitting circuit.

13. A wireless power receiver apparatus comprising:

a power receiver configured to receive wirelessly transmitted power and output charging power for charging a battery;

a power managing circuit configured to control the power receiver depending on a level of charge of the battery; and

an indicator configured to emit light depending on a determined status of the battery.

14. The wireless power receiver of claim 13, wherein the power receiver comprises:

a receiver configured to receive the wirelessly transmitted power using a receiving coil; and

a converter configured to convert the power received by the receiver into the charging power in response to a control signal output by the power managing circuit.

15. The wireless power receiver of claim 14, wherein the indicator includes a light emitting diode connected between the battery and the converting unit.

16. A wireless power transmission method comprising:

actuating a power supply to radiate a wireless power from a resonator;

continuously determining a luminance characteristic; and

,

adaptively controlling the power supply to change the wireless power radiation responsive to detected changes in the luminance characteristic.

17. The wireless power transmission method of claim 16, wherein the power supply is actuated responsive to a determination that a wireless power receiving apparatus has been enclosed within a wireless power transmission apparatus.

18. The wireless power transmission method of claim 16, wherein the power supply is actuated responsive to a determination that a locking mechanism has been actuated to lock a wireless receiving apparatus within a wireless transmission apparatus.

19. The wireless power transmission method of claim 16, wherein the power supply is adaptively controlled to change a magnitude of the wireless power transmission according to a determined luminance characteristic of a wireless power receiving apparatus.

20. A method of controlling wireless power charging, comprising:

determining an operational characteristic in a wireless power receiver;

selectively actuating a light emitting device within the wireless power receiver to emit a light indicating a requested magnitude of wireless power radiation according to the determined operational characteristic; and

,

responsive to reception of a wireless power radiation, actuating a power management circuit to supply current to a battery within the wireless power receiver.

21. The method of controlling wireless power charging of claim 20, wherein the light emitting device is selectively actuated to emit a light pattern encoding a requested magnitude of wireless power radiation from a wireless power transmitter according to the determined operational characteristic in the wireless power receiver.

22. The method of controlling wireless power charging of claim 20, wherein the operational characteristic includes at least one of:

voltage across the battery, current flow, temperature, or time, or combinations thereof.

23. The method of controlling wireless power charging of claim 21, wherein the light emitting device is selectively actuated at a luminance intensity corresponding to a requested magnitude of wireless power radiation from the wireless power transmitter according to the determined operational characteristic in the wireless power receiver.