Transmitting apparatus for both wireless charging and short range communication

• US 10,178,623 B2
• Filed: 07/21/2015
• Issued: 01/08/2019
• Est. Priority Date: 07/23/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Chae, Yong Suk, Park, Soo Young, Lee, Jong Heon
• Primary Examiner(s): Jain, Raj
• Assistant Examiner(s): Kim, Harry H
• Application Number:
  US15/327,946
• Publication Number:
  US 20170201945A1
• Time in Patent Office: 1,267 Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H04B 1/02 Transmitters
• 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
• CPC Class Codes: H04W 52/0258 controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed herein is a transmitting apparatus for both wireless charging and short range communication. According to an embodiment, the transmitting apparatus for both wireless charging and short range communication includes a power transmitter configured to wirelessly transmit power to a power receiver, a communication transmitter configured to wirelessly transmit information to a communication receiver, and a controller configured to control the transmitting apparatus to be selectively switched between a first mode in which the power transmitter is enabled and the communication transmitter is disabled and a second mode in which the communication transmitter is enabled and the power transmitter is disabled. The controller may switch to the first mode when the power receiver is sensed, and may switch to the second mode when the communication receiver is sensed. According to an embodiment of the present invention, a power receiver or a communication receiver is sensed and then a power transmitter or a communication transmitter corresponding thereto is selectively operated so that a communication error that occurs when the power transmitter and the communication transmitter are simultaneously operated is prevented and an unnecessary waste of power is reduced.

Claims

1. A transmitting apparatus for both wireless charging and short range communication, the transmitting apparatus comprising:

a power transmitter configured to wirelessly transmit power to a power receiver;

a communication transmitter configured to wirelessly transmit information to a communication receiver; and

a controller configured to control the transmitting apparatus to be selectively switched between a first mode in which the power transmitter is enabled and the communication transmitter is disabled and a second mode in which the communication transmitter is enabled and the power transmitter is disabled,

wherein the controller switches to the first mode when the power receiver is sensed and switches to the second mode when the communication receiver is sensed,

wherein, when the power receiver is sensed, the controller transmits the power to the corresponding power receiver when the power receiver is a resonance type and performs a process of repeatedly sensing a power receiver when the power receiver is not the resonance type, and controls the transmitting apparatus to be switched to the second mode when the power receiver which is not the resonance type is consecutively sensed for a predetermined number of times, and

wherein, when the communication receiver is sensed, the controller transmits information to the corresponding communication receiver when the communication receiver uses a near field communication (NFC) method and performs a process of repeatedly sensing a communication receiver when the communication receiver does not use the NFC type method, and controls the transmitting apparatus to be switched to the first mode when the communication receiver that does not use the NFC type method is consecutively sensed for a predetermined number of times.

2. The transmitting apparatus of claim 1, wherein the transmitting apparatus sets which receiver has priority when both of the communication receiver and the power receiver are sensed.

3. The transmitting apparatus of claim 1, wherein the controller senses the power receiver or the communication receiver through whether a protocol between the power transmitter and the power receiver or between the communication transmitter and the communication receiver is connected.

4. The transmitting apparatus of claim 3, wherein the controller senses the power receiver or the communication receiver through a response signal following a message transmitted to the power receiver or the communication receiver.

5. The transmitting apparatus of claim 4, wherein the controller sets a response signal waiting time with respect to the power receiver and a response signal waiting time with respect to the communication receiver to be different.

6. The transmitting apparatus of claim 1, wherein the controller repeatedly switches between the first mode and the second mode, maintains the first mode when the power receiver is sensed, maintains the second mode when the communication receiver is sensed, and repeatedly switches between the first mode and the second mode again when neither of the power receiver nor the communication receiver is sensed while the first mode or the second mode is maintained.

7. The transmitting apparatus of claim 6, wherein a cycle at which switching between the first mode and the second mode repeatedly occurs is 300 milliseconds (ms) or longer.

8. The transmitting apparatus of claim 1, wherein the power transmitter or the communication transmitter is enabled or disabled by controlling power supplied to the power transmitter or the communication transmitter.

9. The transmitting apparatus of claim 1, wherein the power transmitter transmits the power using a magnetic resonance type method, and the communication transmitter transmits the information using an NFC type method.

10. The transmitting apparatus of claim 1, wherein the power transmitter uses a frequency of 6.78 MHz, and the communication transmitter uses a frequency of 13.56 MHz.

11. The transmitting apparatus of claim 1, further comprising a power converter configured to convert power received from a power source and transmit the converted power to the power transmitter.

12. The transmitting apparatus of claim 1, wherein the controller controls the transmitting apparatus to be selectively switched between the first mode and the second mode by controlling one or more of a silicon controlled rectifier (SCR), a triode for alternating current (TRIAC), a bipolar junction transistor (BJT), and a field effect transistor (FET).

13. The transmitting apparatus of claim 1, further comprising a short range communication antenna connected to the communication transmitter and a wireless charging antenna connected to the power transmitter.

14. The transmitting apparatus of claim 13, wherein the short range communication antenna and the wireless charging antenna are placed on a soft magnetic shielding member.

15. The transmitting apparatus of claim 14, wherein the short range communication antenna is arranged inside the wireless charging antenna.

16. A pad for wireless charging and short range communication, the pad comprising:

a power transmitter configured to wirelessly transmit power to a power receiver;

a communication transmitter configured to wirelessly transmit information to a communication receiver; and

a controller configured to control the pad to be selectively switched between a first mode in which the power transmitter is enabled and the communication transmitter is disabled and a second mode in which the communication transmitter is enabled and the power transmitter is disabled,

wherein the controller switches to the first mode when the power receiver is sensed and switches to the second mode when the communication receiver is sensed,

wherein, when the power receiver is sensed, the controller transmits the power to the corresponding power receiver when the power receiver is a resonance type and performs a process of repeatedly sensing a power receiver when the power receiver is not the resonance type, and controls the transmitting apparatus to be switched to the second mode when the power receiver which is not the resonance type is consecutively sensed for a predetermined number of times, and

wherein, when the communication receiver is sensed, the controller transmits information to the corresponding communication receiver when the communication receiver uses a near field communication (NFC) method and performs a process of repeatedly sensing a communication receiver when the communication receiver does not use the NFC type method, and controls the transmitting apparatus to be switched to the first mode when the communication receiver that does not use the NFC type method is consecutively sensed for a predetermined number of times.