KR20200072884A - Wireless power transmitting apparatus and method of the same - Google Patents

Abstract

The present invention relates to a wireless power transmitting device which minimizes damage to a near range communication card due to operation of the wireless power transmitting device, and a method thereof. According to an embodiment of the present invention, the wireless power transmitting device comprises: a wireless power transmitting unit transmitting wireless power; a near field communication unit performing wireless communication; and a control unit controlling the wireless power transmitting unit and the near field communication unit. The control unit controls operation of the wireless power transmitting unit based on transmission speed information of a near field communication receiving device.

Description

Wireless power transmitter and method {WIRELESS POWER TRANSMITTING APPARATUS AND METHOD OF THE SAME}

This embodiment relates to a wireless power transmission apparatus and method.

In general, a charging system (hereinafter referred to as a “wireless charging system”) and a control method using a method of wirelessly transmitting power by using an electrical connection method between a charging device for charging battery power and a battery are used. In general, the wireless charging system is composed of a wireless power transmitter that supplies electrical energy with a wireless power transmission method and a wireless power receiver that receives the electrical energy supplied from the wireless power transmitter and charges the battery.

In addition, due to the development of mobile communication and information processing technology, portable terminals provide various wireless Internet services such as video calls as well as content services. In order to provide the above-described service, the portable terminal uses NFC (Near Field Communication) technology. NFC technology is a non-contact short-range wireless communication using a frequency band of 13.56MHz, refers to a communication technology that transmits data in both directions between terminals within a short distance within 10cm. In addition, as described above, separately from the portable terminal, users use a separate card for the NFC function. Such a card is generally used as a means for user authentication and executing various applications using the card.

Separate devices, such as a card for performing a short-range communication function, are often mounted on the back of a portable terminal or carried by users for convenience. In this case, when the portable terminal performs wireless charging, it may be damaged by the power radiated from the wireless power transmitter. Can take damage. In addition, the wireless power transmitter may not distinguish between the case where the short-range communication function is built in the portable terminal and the short-range communication card, and may cause damage to the short-range communication card due to not performing wireless charging or executing wireless charging.

This embodiment is designed to solve the problems of the prior art, the purpose of this embodiment is to provide a wireless power transmission apparatus and method.

In addition, the present embodiment provides a wireless power transmission apparatus and method for minimizing damage to the short-range communication card by the operation of the wireless power transmission apparatus.

In addition, the present embodiment provides a wireless power transmitting apparatus and method for distinguishing a wireless power receiving apparatus supporting short-range communication from a short-range communication card and performing an operation accordingly.

In addition, the present embodiment provides a wireless power transmitting apparatus and method for distinguishing a wireless power receiving apparatus that does not support short-range communication from a short-range communication card and performing an operation accordingly.

In addition, the present embodiment provides a wireless power transmission apparatus and a method for operating the same to minimize interference between short-range communication and wireless charging operation.

In addition, the present embodiment provides a wireless power transmission apparatus and method for supplementing a function of a terminal that does not support short-range communication.

In addition, the present embodiment provides a wireless power transmission apparatus and method for performing an operation corresponding to a detected receiver.

The technical tasks to be achieved in this embodiment are not limited to the above-mentioned technical tasks, and other technical tasks not mentioned are clearly understood by a person having ordinary knowledge in the technical field to which this embodiment belongs from the following description. It could be.

The wireless power transmitter according to the present embodiment includes a wireless power transmitter for transmitting wireless power; A short-range communication unit performing wireless communication; And a control unit controlling the wireless power transmitter and the short-range communication unit, wherein the control unit controls the operation of the wireless power transmitter based on the transmission speed information of the short-range communication receiving apparatus.

The wireless power transmitter according to the present embodiment includes a wireless power transmitter for transmitting wireless power; A short-range communication unit performing wireless communication; And a control unit controlling the wireless power transmitter and the short-range communication unit, wherein the control unit controls the operation of the wireless power transmitter based on the impedance change of the short-range communication unit and the transmission speed information of the short-range communication receiving device.

The wireless power transmission method according to the present embodiment includes detecting an object disposed in a charging area; Transmitting a transmission rate information request signal of a short-range communication receiving device; Receiving the transmission rate information; Checking the impedance change of the short-range communication unit; And determining whether a wireless power transmission operation is performed based on the impedance change of the short-range communication unit and the received transmission rate information.

The effects of the wireless power transmission apparatus and method according to the present embodiment are as follows.

According to the wireless power transmission apparatus and method according to the present embodiment, it is possible to perform normal short-range communication or wireless power transmission while minimizing damage to a short-range communication receiving apparatus by the operation of the wireless power transmission apparatus.

In addition, according to the wireless power transmission apparatus and method according to the present embodiment, by distinguishing the wireless power receiving apparatus supporting the short-range communication and the short-range communication card, and can perform the operation accordingly, to prevent interference between devices and device protection Can.

In addition, according to the wireless power transmission apparatus and method according to the present embodiment, it is possible to supplement the function of a terminal that does not support short-range communication.

In addition, according to the present embodiment, an operation conforming to a receiver detected by the wireless power transmitter may be performed.

The effects obtainable in this embodiment are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

The accompanying drawings are provided to help understanding of the present invention, and provide embodiments of the present invention with detailed description. However, the technical features of the present invention are not limited to specific drawings, and features disclosed in each drawing may be combined with each other to form a new embodiment.
1 is a block diagram illustrating a wireless charging system according to an embodiment.
2 is a block diagram illustrating the structure of a wireless power transmitter according to an embodiment.
3 is a block diagram illustrating the structure of a wireless power receiver according to an embodiment.
4 is a block diagram illustrating the structure of a short-range communication card according to an embodiment.
5 is a state transition diagram for describing a wireless power transmission procedure according to an embodiment.
6 is a flowchart illustrating an operation of a wireless power transmitter according to an embodiment.
7 is a flowchart of an operation of a wireless power transmitter according to another embodiment.
8 is an exemplary view showing a change in impedance of the wireless power transmission apparatus according to the embodiment of FIGS. 6 and 7.
9 is an operation flowchart of a wireless power transmission apparatus according to another embodiment.
10 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.
11 is an exemplary view for explaining an example of a short-range communication transmission speed detected by the wireless power transmission apparatus according to the embodiment of FIGS. 9 and 10.
12 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.
13 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.
14 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.
15 is a flowchart illustrating an operation of a wireless power transmission apparatus according to another embodiment.

Hereinafter, an apparatus to which embodiments are applied and various methods will be described in detail with reference to the drawings. The suffixes "modules" and "parts" for components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves.

In the above, all the components constituting the embodiment are described as being combined or operated as one, and the present invention is not necessarily limited to these embodiments. That is, if it is within the scope of the present invention, all of the components may be selectively combined and operated. In addition, although all of the components may be implemented by one independent hardware, a part or all of the components are selectively combined to perform a combined function of some or all of the functions in one or a plurality of hardware. It may be implemented as a computer program having a. The codes and code segments constituting the computer program can be easily deduced by those skilled in the art of the present invention. Such a computer program is stored in a computer readable storage medium (Computer Readable Media) and read and executed by a computer, thereby implementing an embodiment. The storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.

In the description of the embodiment, when described as being formed in the "top (top) or bottom (bottom)", "before (front) or after (back)" of each component, "top (top) or bottom (Below) and “before (front) or after (back)” include both two components in direct contact with each other, or one or more other components formed between two components.

In addition, the terms "include", "consist" or "have" as described above mean that the component can be inherent, unless specifically stated otherwise, to exclude other components. It should not be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the meaning in the context of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component It will be understood that elements may be "connected", "coupled" or "connected".

In the description of the present invention, if it is determined that the subject matter of the present invention may be unnecessarily obscured by those skilled in the art with respect to the related known technology, the detailed description thereof will be omitted.

In the description of the embodiment, the apparatus for transmitting wireless power on the wireless power charging system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, and a transmitter for convenience of explanation. , Wireless power transmission device, wireless power transmitter, wireless charging device, etc. will be used in combination. In addition, as a representation of a device for receiving wireless power from a wireless power transmitter, for convenience of description, a wireless power receiver, wireless power receiver, wireless power receiver, wireless power receiver, receiver terminal, receiver, receiver, receiver Terminals and the like can be used interchangeably.

The wireless charging device according to the embodiment may be configured in a pad form, a cradle form, an access point (AP) form, a small base station form, a stand form, a ceiling buried form, a wall mount form, etc., and one transmitter receives a plurality of wireless powers. It is also possible to transmit power to the device.

For example, the wireless power transmitter can be used not only on a desk or a table, but can also be developed and applied for automobiles to be used in a vehicle. The wireless power transmitter installed in the vehicle may be provided in the form of a cradle that can be easily and stably fixed and mounted.

The terminal according to the embodiment is a mobile phone, a smart phone, a laptop computer, a terminal for digital broadcasting, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric It may be used in a small electronic device such as a toothbrush, an electronic tag, a lighting device, a remote controller, a fishing boat, but is not limited thereto, and is equipped with a wireless power receiving means according to an embodiment to enable battery charging for a mobile device device (hereinafter, "device") The term "terminal" or "device" may be used interchangeably. The wireless power receiver according to another embodiment may be mounted in a vehicle, an unmanned aerial vehicle, an air drone, and the like.

In general, a wireless power transmitter and a wireless power receiver constituting a wireless power system may exchange control signals or information through in-band communication or Bluetooth Low Energy (BLE) communication. Here, in-band communication and BLE communication may be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, and the like. For example, the wireless power receiver may transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching ON/OFF the current induced through the receiving coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various status information including received power strength information. At this time, the wireless power transmitter may calculate charging efficiency or power transmission efficiency based on the received power strength information.

1 is a block diagram illustrating a wireless charging system according to an embodiment.

Referring to FIG. 1, the wireless charging system is largely provided with a wireless power transmitter 10 for wirelessly transmitting power, a wireless power receiver 20 for receiving the transmitted power, and an electronic device 30 receiving the received power. Can be configured.

For example, the wireless power transmitting end 10 and the wireless power receiving end 20 may perform in-band communication for exchanging information using the same frequency band as the operating frequency used for wireless power transmission. As another example, the wireless power transmitting end 10 and the wireless power receiving end 20 may perform out-of-band communication by exchanging information using a separate frequency band different from the operating frequency used for wireless power transmission. have.

For example, information exchanged between the wireless power transmitting end 10 and the wireless power receiving end 20 may include control information as well as status information of each other. Here, the state information and control information exchanged between the transmitting and receiving terminals will become clearer through descriptions of embodiments to be described later.

The in-band communication and the out-of-band communication may provide two-way communication, but are not limited thereto, and in other embodiments, uni-directional communication or half-duplex communication may be provided. For example, the unidirectional communication may be that the wireless power receiving end 20 transmits information only to the wireless power transmitting end 20, but is not limited thereto, and the wireless power transmitting end 10 transmits information to the wireless power receiving end 20. It may be sending.

In the half-duplex communication method, two-way communication between the wireless power receiving end 20 and the wireless power transmitting end 10 is possible, but it is characterized in that information can be transmitted by only one device at any one time.

The wireless power receiver 20 according to the embodiment may acquire various state information of the electronic device 30. For example, the status information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge status information, battery output voltage/current information, etc., but is not limited thereto. If not, it is sufficient if the information can be obtained from the electronic device 30 and can be used for wireless power control.

2 is a block diagram illustrating the structure of a wireless power transmitter according to an embodiment.

Referring to FIG. 2, the wireless power transmitter 200 includes a power conversion unit 210, a power transmission unit 220, a wireless charging communication unit 230, a control unit 240, a current sensor 250, and a temperature sensor 260. , It may be configured to include a storage unit 270, a fan 280, a timer 290, a local area communication unit 201, a wireless communication coil 202. The configuration of the wireless power transmitter 200 is not necessarily an essential configuration, and thus may include more or fewer components.

As illustrated in FIG. 2, the power supply unit 100 may provide supply power. The power supply unit 100 may correspond to a battery built into the wireless power transmitter 200 or may be an external power supply. The embodiment is not limited to the form of the power supply 100.

The power converter 210 may perform a function of converting power to power of a predetermined intensity when power is supplied from the power unit 100.

To this end, the power converter 210 may include a DC/DC converter 211 and an amplifier 212.

The DC/DC converter 211 may perform a function of converting DC power of a specific intensity according to a control signal of the controller 240 to DC power supplied from the power supply 100.

The amplifier 212 may adjust the intensity of the DC/DC converted power according to the control signal of the controller 240. For example, the control unit 240 may receive the power reception state information or the power control signal of the wireless power receiver through the wireless charging communication unit 230, and the amplifier 212 based on the received power reception state information or the power control signal The amplification factor of can be dynamically adjusted. For example, the power reception state information may include intensity information of a rectifier output voltage, information of intensity of a current applied to the receiving coil, but is not limited thereto. The power control signal may include a signal for requesting an increase in power and a traffic light for requesting power dissipation.

The current sensor 250 may measure an input current input to the driver 210. The current sensor 250 may provide the measured input current value to the controller 240. For example, the controller 240 may adaptively cut off the supply of power from the power supply 100 or block power from being supplied to the amplifier 212 based on the input current value measured by the current sensor 250.

The temperature sensor 260 measures the internal temperature of the wireless power transmitter 200 and provides the measurement result to the control unit 240. Specifically, the temperature sensor 260 may include one or more temperature sensors. One or more temperature sensors may be disposed to correspond to the transmission coil 223 of the power transmission unit 220 to measure the temperature of the transmission coil 223. For example, the control unit 240 may adaptively cut off power supply from the power supply unit 100 or block power from being supplied to the amplifier 212 based on the temperature value measured by the temperature sensor 260. To this end, one side of the power conversion unit 210 may be further provided with a predetermined power blocking circuit to cut off the power supplied from the power supply unit 100 or to cut off the power supplied to the amplifier 212. As another example, the control unit 240 may adjust the intensity of power provided to the power transmission unit 220 based on the temperature value measured by the temperature sensor 260. Accordingly, the wireless power transmitter according to the embodiment can prevent the internal circuit from being damaged due to overheating.

The power transmission unit 220 serves to transmit a signal output from the power conversion unit 210 to a wireless power receiver. To this end, the power transmission unit 220 may include a driving unit 221, a selection unit 222, and one or more transmission coils 223.

The driver 221 may generate an AC power signal in which an AC component having a specific frequency is inserted into the DC power signal output from the power converter 210 and transmit it to the transmitting coil 223. At this time, the frequencies of the AC power signals transmitted to the plurality of transmission coils included in the transmission coil 223 may be the same or different from each other.

The selector 222 may receive an AC power signal having a specific frequency from the driver 221 and transmit the AC power signal to the selected transmission coil among a plurality of transmission coils. Here, the coil selection unit 222 may transmit a power signal to the transmission coil selected by the control unit 2400 according to a predetermined control signal of the control unit 240. Here, the selection unit 222 is applied to a predetermined control signal of the control unit 240. Accordingly, it is possible to control the AC power signal to be transmitted to the coil selected by the controller 240. More specifically, the selector 222 is a switch for connecting the LC resonance circuit corresponding to the plurality of transmitting coils 223 ( (Not shown), but is not limited thereto, and the selector 222 may be excluded from the power transmitter 220 when the transmitter coil 223 is configured as one transmitter coil.

The transmission coil 223 may include at least one transmission coil, and may transmit an AC power signal received from the selector 222 to the receiver through the transmission coil. When there are multiple transmission coils, the transmission coils can be transmitted to the receiver. When there are a plurality of transmission coils, the plurality of transmission coils 223 may include first to nth transmission coils. The selector 222 may be implemented as a switch or a multiplexer in order to select “corresponding transmission coil” among a plurality of transmission coils. In addition, the transmitting coil 223 may include one capacitor (not shown) connected in series with a plurality of transmitting coils to implement the LC resonance circuit. The capacitor has one end connected to the transmitting coil 223 and the other end driving unit. It can be connected to (221). Here, “corresponding transmission coil” may mean a transmission coil having a state that can be coupled by an electromagnetic field and a reception coil of a wireless power receiver that is qualified to receive power wirelessly. According to an embodiment of the present disclosure, the control unit 240 dynamically uses a transmission coil to be used for wireless power transmission among a plurality of transmission coils provided based on a received signal strength indicator corresponding to a digital ping signal transmitted for each transmission coil. You can choose.

The control unit 240 may control the selector 222 or the multiplexer so that the detection signals may be sequentially transmitted through the first to nth transmission coils 223 during the first detection signal transmission procedure. At this time, the control unit 240 may identify the time point at which the detection signal is to be transmitted using the timer 290, and when the detection signal transmission time arrives, the selection unit 222 or multiplexer is controlled to sense through the corresponding transmission coil. It can be controlled so that the signal can be transmitted. For example, the timer 290 may transmit a specific event signal to the control unit 240 at a predetermined cycle during the ping transmission step, and when the event signal is detected, the control unit 240 controls the selector 222 or multiplexer to It is possible to control the digital ping to be transmitted through the transmission coil.

Particularly, in the present embodiment, the control unit 240 may include a wireless power transmission control unit for controlling wireless power transmission, a wireless communication control unit for performing wireless communication, and a main control unit for controlling the wireless power transmission control unit and the wireless communication control unit. Can. Specifically, the wireless communication controller according to the present embodiment may control a short-range communication module for performing short-range communication with the receiving device according to a receiving device tagged to the wireless power transmission device. Specifically, the wireless communication control unit may control to perform a user authentication and short-range communication application based on the identifier information received from the detected receiving device. In addition, the wireless power transmission control unit may perform overall control of the wireless charging mode operation. Specifically, the wireless power transmission control unit may execute a wireless power transmission operation according to the detected receiving device. In addition, an operation control signal of the wireless communication control unit or an operation control signal of the wireless power transmission control unit may be generated according to a sensing device sensed by controlling the operation of the wireless communication control unit and the wireless power transmission control unit. However, the present invention is not limited thereto, and the wireless power transmission control unit, the wireless communication control unit, and the main control unit may be configured as one control unit.

The modulator 231 modulates the control signal generated by the control unit 240 and transmits the modulated signal to the driving unit 210. Here, the modulation method for modulating the control signal is FSK (Frequency Shift Keying) modulation method, Manchester Coding (Manchester Coding) modulation method, PSK (Phase Shift Keying) modulation method, Pulse Width Modulation (Pulse Width Modulation) method, differential 2 steps (Differential bi-phase) may include a modulation method, but is not limited thereto.

When the signal received through the transmission coil is detected, the demodulator 232 may demodulate the detected signal and transmit it to the controller 240. Here, the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for power control during wireless power transmission, an end of charge (EOC) indicator, and an overvoltage/overcurrent/overheat indicator, It is not limited thereto, and various state information for identifying the state of the wireless power receiver may be included.

In addition, the demodulator 232 may identify which transmission coil the demodulated signal is from, and may provide a predetermined transmission coil identifier corresponding to the identified transmission coil to the controller 240.

For example, the wireless power transmitter 200 may obtain the signal strength indicator through in-band communication that performs communication with the wireless power receiver using the same frequency used for wireless power transmission.

In addition, the wireless power transmitter 200 may not only transmit wireless power using the transmission coil 223, but may also exchange various information with the wireless power receiver through the transmission coil 223. As another example, the wireless power transmitter 200 further includes a separate coil corresponding to each of the transmission coils, that is, the first to nth transmission coils, and in-band communication with the wireless power receiver by using the provided separate coils. You can also do

The storage unit 270 includes the input current value of the wireless power transmitter according to the charging state of the wireless power receiver, the charging power strength, whether charging is stopped, the temperature of the wireless power transmitter to restart charging, the time after charging is stopped to restart charging, and the fan. Whether it works or not, fan RPM, etc. can be saved. In particular, another storage unit 270 in the present example may store information about an impedance change according to a receiving device detected by the wireless power transmitter 200. For example, when a receiving device is detected in a wireless power transmitter, a reference value for a variable impedance may be stored. In addition, the storage unit 270 may store information for detecting whether or not the receiver is detected by the wireless power transmitter. For example, the above-described impedance change amount, transmission speed information, and the like may be stored.

The fan 280 may be rotated by a motor to cool the overheated wireless power transmitter 200. The fan 280 may be disposed in response to a configuration in which the degree of overheating is severe. For example, the fan 280 may be disposed corresponding to the power transmission unit 220. More specifically, the fan 280 may be disposed corresponding to the transmission coil 223 of the power transmission unit 220. The control unit 240 may operate the fan 280 according to the charging state of the wireless power receiver.

The short-range communication unit 201 may perform short-range two-way communication through a frequency band different from a frequency band used for wireless power signal transmission. For example, short-range two-way communication may be NFC (Near Field Communication). NFC is one of radio frequency identification (RFID) technologies, and is a wireless communication technology that exchanges various wireless data within a short distance of 10 cm using a frequency of 13.56 MGz.

The wireless communication coil 202 may transmit and receive signals used in short-distance bidirectional communication with the wireless power receiver.

Meanwhile, in the present embodiment, a configuration of a wireless power receiver including a short-range communication unit 201 and a wireless communication coil 202 is described as an example, but is not limited thereto, and the wireless power receiver does not support short-range communication. The short-range communication unit and the wireless communication coil may be omitted.

3 is a block diagram illustrating the structure of a wireless power receiver according to an embodiment.

Referring to FIG. 3, the wireless power receiver 300 includes a receiving coil 310, a rectifier 320, a DC/DC converter 330, a load 340, a sensing unit 350, and a communication unit 360, a wireless communication coil 370, a short-range communication unit 380, may include a control unit 390. Here, the communication unit 360 may include at least one of a demodulation unit 361 and a modulation unit 362.

The wireless power receiver 300 shown in the example of FIG. 3 is illustrated as being capable of exchanging information through the wireless power transmitter 200 through in-band communication, but this is only one embodiment, and other embodiments The communication unit 360 according to an example may provide bidirectional communication through a frequency band different from a frequency band used for wireless power signal transmission.

In addition, in the present exemplary embodiment, a configuration including a wireless communication coil 370 and a short-range communication unit 380 for short-range communication (NFC communication) has been described as an example, but this is not limited, and the receiver does not support short-range wireless communication. In this case, the above configuration can be omitted.

AC power received through the receiving coil 310 may be transmitted to the rectifier 320. The rectifier 320 may convert AC power into DC power and transmit it to the DC/DC converter 330. The DC/DC converter 330 may convert the intensity of the output DC power of the rectifier to a specific intensity required by the load 340 and transmit it to the load 340.

The sensing unit 350 measures the intensity of the output DC power of the rectifier 320 and provides it to the control unit 390. In addition, the sensing unit 350 may measure the strength of the current applied to the receiving coil 310 according to wireless power reception and transmit the measurement result to the control unit 390. In addition, the sensing unit 350 may measure the internal temperature of the wireless power receiver 300 and provide the measured temperature value to the control unit 390.

For example, the control unit 390 may determine whether an overvoltage occurs by comparing the measured intensity of the output DC power with a predetermined reference value. As a result of the determination, when an overvoltage is generated, a predetermined packet notifying that an overvoltage has occurred may be generated and transmitted to the modulator 362. Here, it can be transmitted to the modulator 362. Here, the signal modulated by the modulator 362 may be transmitted to the wireless power transmitter 200 through the receiving coil 310 or a separate coil (not shown). In addition, the control unit 390 may determine that the detection signal is received when the intensity of the output DC power of the rectifier is greater than or equal to a predetermined reference value, and when the detection signal is received, a signal strength indicator corresponding to the detection signal is wirelessly transmitted through the modulation unit 362 It can be controlled to be transmitted to the power transmitter 200.

As another example, the demodulator 361 demodulates the AC power signal between the receiving coil 310 and the rectifier 320 or the output DC power signal of the rectifier 320 to identify whether the detection signal is received, and then identifies the identification result. It can be provided to the control unit 390. In this case, the controller 390 may control the signal strength indicator corresponding to the detection signal to be transmitted through the modulator 362.

The wireless communication coil 370 may transmit and receive a short-range wireless communication signal through a short-range communication coil that may be configured in the wireless power transmitter 200.

The short-range communication unit 380 may perform short-range communication with the wireless power transmitter based on the short-range communication signal received through the wireless communication coil 370. The short-range communication unit 380 may perform short-range two-way communication through a frequency band different from a frequency band used for wireless power signal transmission. For example, short-range two-way communication may be NFC (Near Field Communication). NFC is one of radio frequency identification (RFID) technologies, and is a wireless communication technology that exchanges various wireless data within a short distance within 10 cm using a frequency of 13.56 MHz.

4 is a block diagram illustrating the structure of a short-range communication card according to an embodiment.

Referring to FIG. 4, the near field communication card (NFC card) 400 may include a connector 410, a secure element (SE) 420, a control unit 430, and an antenna 440.

The control unit 430 may communicate with NFC through the antenna 440 to provide identifier information and transmission speed information to a terminal tagged by a short-range communication card. The short-range communication card 400 provides, for example, identifier information and transmission speed information to the terminal so that the terminal can recognize the short-range communication card and the terminal can perform a short-range communication application according to the recognized short-range communication card. have. As an example, the short-range communication card may be used as a user key for the vehicle's wake, start-up and operation applications. Also, the short-range communication card may be a card (ID card) for user identification.

5 is a state transition diagram for describing a wireless power transmission procedure according to an embodiment.

5, the power transmission from the transmitter to the receiver is largely a selection phase (Selection Phase, 510), a ping phase (Ping Phase, 520), identification and configuration phase (Identification and Configuration Phase, 530), negotiation phase (Negotiation) Phase, 540), a calibration phase (Calibration Phase, 550), a power transfer phase (Power Transfer Phase, 560) phase and a renegotiation phase (Renegotiation Phase, 570).

The selection step 510 may be a transition step when a specific error or specific event is detected while starting power transmission or maintaining power transmission.

Here, specific errors and specific events will be clarified through the following description. In addition, in the selection step 510, the transmitter may monitor whether an object is present on the interface surface.

If the transmitter detects that an object is placed on the interface surface, it may transition to ping step 520. In the selection step 510, the transmitter transmits a very short pulse analog ping signal, and an object in the active area of the interface surface based on the current change of the transmitting coil or the primary coil. Can detect if exists.

In ping step 520, the transmitter activates the receiver when an object is detected, and activates the wireless power receiver to identify whether it is a wireless power receiver capable of receiving wireless power to generate a response signal. To send. In the ping step 520, if the transmitter does not receive a response signal for digital ping-for example, a signal strength packet-from the receiver, the transmitter may transition back to the selection step 510.

Also, in the ping step 520, the transmitter may transition to the selection step 510 upon receiving a signal-side, a charging complete packet- indicating that power transmission is complete from the receiver.

When the ping step 520 is completed, the transmitter can identify the receiver and transition to the identification and configuration step 530 for collecting receiver configuration and status information.

In the identification and configuration step 530, the transmitter may receive an unexpected packet, an undesired packet for a predefined time (time out), a packet transmission error (transmission error), or a power transmission contract. If this is not set (no power transfer contract), it may transition to the selection step 510.

The transmitter may check whether entry into the negotiation step 540 is necessary based on the value of the negotiation field of the configuration packet received in the identification and configuration step 530.

As a result of the check, if negotiation is required, the transmitter may enter a negotiation step 540 to perform a predetermined foreign object detection (FOD) procedure.

On the other hand, if negotiation is not required as a result of the confirmation, the transmitter may immediately enter the power transmission step 560.

In the negotiation step 540, the transmitter may receive the FOD status packet including the reference quality factor value. At this time, the transmitter may determine a threshold value for FO detection based on the reference quality factor value.

For example, the transmitter may determine a threshold value or a threshold range for determining the presence or absence of a foreign material by using a predetermined threshold generation function using a reference quality factor value as a parameter. Here, the threshold value or threshold range calculated by the threshold generation function is a value smaller than the reference quality factor value. In general, when a foreign material is placed in the charging area, the quality factor value measured in the resonant circuit of the transmitter is lower than before the foreign material is placed. When a foreign substance is placed in the charging area in the actual wireless charging system, the ratio of the measured quality factor value to the reference quality factor value is reduced by the type of the receiver disposed in the charging region-that is, the reference quality factor value of the corresponding wireless power receiver- May be different.

In the power transmission step 540, the transmitter may receive an unsolicited packet (unexpected packet), or receive a desired packet for a predefined time (time out), or a violation of a preset power transmission contract (power). transfer contract violation), when charging is completed, may transition to the charging completion stage. In the charging completion step, the transmitter may transition to the selection step 510 when it is confirmed that the receiver has been removed from the charging surface.

In addition, in the power transmission step 440, the transmitter may transition to the renegotiation step 570 when it is necessary to reconfigure the power transmission contract according to a change in the transmitter state.

The above-described power transmission contract may be established based on the status and characteristic information of the transmitter and receiver. For example, the transmitter status information may include information on the maximum transmittable power, information on the maximum number of receivers that can be accommodated, and receiver status information may include information on required power.

On the other hand, in FIG. 5, for example, it has been described that the wireless power transmitter can detect whether an object exists in an active area of the interface surface by transmitting an analog ping signal. However, the present invention is not limited thereto, and in this embodiment, the transmission of the analog ping signal may be omitted, and instead, a detection signal of the short-range communication receiving device for short-range communication may be transmitted, and an object in the active area based on the response signal accordingly Can detect if exists. Further, as another embodiment, by transmitting the analog ping and the detection signal of the short-range communication receiving device together, it is possible to detect whether an object exists in the active area.

6 is a flowchart illustrating an operation of a wireless power transmitter according to an embodiment.

Referring to FIG. 6, the wireless power transmitter may transmit a predetermined power signal for sensing the receiver. (S602) Here, the power signal for sensing the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter may detect whether an object is placed in the charging area. (S604) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed on the charging area. Can judge. Alternatively, an object detection may be performed according to whether a response signal for the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, the impedance according to the sensed object can be measured. (S606) When the conductive object is placed in the charging area, a high impedance change amount can be detected. Conversely, on the contrary, if a non-conductive object is placed, there may be little or no impedance change. As an example, FIG. 8 is an exemplary view showing a change in impedance of a wireless power transmission apparatus according to an embodiment. Referring to FIG. 8, the example diagram (a) of FIG. 8 shows an impedance value 800 when an object is not placed in a charging region and an impedance value 810 when a non-conductive object is placed, and (b) an exemplary diagram Shows an example of the impedance value 820 when a conductive object is placed in the charging area. That is, when the wireless power transmitter detects that an object is placed in the charging area, it can measure the impedance and detect the receiver according to the measured impedance value.

The wireless power transmitter may measure impedance and determine whether the measured impedance is greater than or equal to the reference impedance. (S608) At this time, the reference impedance may be a measured impedance value or higher when an object is not placed in the charging area, , It may be a value smaller than the impedance value measured when a conductive object such as a wireless power receiver is placed.

If the measured impedance is greater than the reference impedance as a result of the determination, the wireless power transmitter may check the short-range communication identifier of the device placed in the charging area. (S610) For example, when the measured impedance is greater than the reference impedance It can be detected that the object placed in the charging area is a wireless power receiver. In this case, the wireless power receiving device may be a wireless power receiving device supporting short-range communication (NFC) or a short-range communication card (NFC card) and a wireless power receiving device superimposed (coexisting) on the charging area. Therefore, when the measured impedance value is greater than or equal to the reference impedance, the wireless power transmitter according to the present embodiment may check the short-range communication identifier for the wireless power receiver or the short-range communication card.

The wireless power transmitter may check the short-range communication identifier of the wireless power receiver or the short-range communication card and execute a short-range communication application corresponding thereto. (S612) For example, the short-range communication application starts the vehicle or uses the user in the vehicle. It may include the operation according to.

Thereafter, when the wireless power transmission apparatus executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S614) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, the short-range communication card may be damaged by the applied power. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

On the other hand, when the measured impedance is less than the reference impedance, the wireless power transmitter may also check the short-range communication identifier of the device placed in the charging area. (S616) For example, when the measured impedance is less than the reference impedance It can be detected that the object placed in the charging area is a short range communication card. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may check the short-range communication identifier and execute a short-range communication application corresponding thereto. (S618) For example, the short-range communication application may include starting the vehicle or operating according to user usage information in the vehicle. Can.

In the embodiment of FIG. 6, detection of an object placed in the charging area may be performed by sensing a sensor or a short-range communication signal, and impedance change according to the detected object may be measured. Subsequently, the type of the short-range communication receiving device may be classified according to the impedance change, and an operation may be performed accordingly.

7 is a flowchart of an operation of a wireless power transmitter according to another embodiment.

Referring to FIG. 7, the wireless power transmitter may transmit a predetermined power signal for sensing the receiver. (S702) Here, the power signal for sensing the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short range communication detection signal for detecting a short range communication receiving device. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter may detect whether an object is placed in the charging area. (S704) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed on the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal to the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, the impedance according to the sensed object can be measured. (S706) When the conductive object is placed in the charging area, a high impedance change amount can be detected. Conversely, on the contrary, if a non-conductive object is placed, there may be little or no impedance change. 8 is a screen view showing an impedance change of the wireless power transmission apparatus according to the embodiment. Referring to FIG. 8, the example diagram (a) of FIG. 8 shows an impedance value 800 when an object is not placed in a charging region and an impedance value 810 when a non-conductive object is placed, and (b) an exemplary diagram Shows an example of the impedance value 820 when a conductive object is placed in the charging area. That is, when the wireless power transmitter detects that an object is placed in the charging area, it can measure the impedance and detect the receiver according to the measured impedance value.

The wireless power transmitter may measure impedance and determine whether the measured impedance is greater than or equal to a reference impedance. In this case, the reference impedance may be an impedance value measured when an object is not placed in the charging area or may be higher, and may be smaller than an impedance value measured when a conductive object such as a wireless charging receiver is placed.

If the measured impedance is greater than the reference impedance as a result of the determination, the wireless power transmitter may check the short-range communication identifier of the device placed in the charging area. (S714) For example, when the measured impedance is greater than the reference impedance, It can be detected that the object placed in the charging area is a wireless power receiver. In this case, the wireless power receiving device may be a wireless power receiving device supporting short-range communication (NFC) or a short-range communication card (NFC) and a wireless power receiving device superimposed on a charging area. Accordingly, the wireless power transmitter according to the present embodiment may check the short-range communication identifier for the wireless power receiver or the short-range communication card when the measured impedance value is greater than or equal to the reference impedance.

The wireless power transmission device may check the short-range communication identifier and determine whether the identified short-range communication identifiers are plural. (S716) For example, when the wireless power transmission device checks the short-range communication identifier, the plurality of identifiers may be used. If not, the detected device may be a wireless power receiving device supporting short-range communication or a wireless power receiving device not supporting short-range communication and a short-range communication card. That is, even if it is a single receiving device or a plurality of receiving devices, only one device may be a device supporting short-range communication.

On the other hand, when there are multiple identifiers, it may be a case that there are a plurality of receiving devices supporting short-range communication. For example, when the short-range communication card and the wireless power receiving device supporting short-range communication overlap or coexist, the wireless power transmitting device may detect a plurality of short-range communication identifiers. In this case, it may be a case where the short-range communication card and the wireless power receiving device supporting short-range communication each transmit a response signal to the requested short-range communication detection signal from the wireless power transmission device.

The wireless power transmitter may be defined as coexistence of a short-range communication card and a wireless power receiving device supporting short-range communication when there are multiple detected short-range communication identifiers. Accordingly, the wireless power transmission device may output an alarm to remove one of the short range communication card or the short range communication support wireless power reception device (for example, an NFC terminal). That is, a user alarm may be output to notify the user that a plurality of short-range communication identifiers are detected and to inform the user of selection or removal of the device.

On the other hand, the wireless power transmitter may check the detected short-range communication identifier when there are not a plurality of detected short-range communication identifiers, and execute a corresponding short-range communication application. (S720) For example, the short-range communication application starts the vehicle. Or it may include an operation according to user usage information in the vehicle.

Thereafter, when the wireless power transmission apparatus executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S722) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, damage due to power applied to the short-range communication card may occur. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

On the other hand, when the measured impedance is less than the reference impedance, the wireless power transmitter can also check the short-range communication identifier of the device placed in the charging area. (S710) For example, when the measured impedance is less than the reference impedance An object placed in the charging area may be defined as a short range communication card. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may check the short-range communication identifier and execute a short-range communication application corresponding thereto. (S712) For example, the short-range communication application may include starting the vehicle or operating according to user usage information in the vehicle. Can.

9 is an operation flowchart of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 9, the wireless power transmitter may transmit a predetermined power signal for sensing the receiver. (S902) Here, the power signal for sensing the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter may detect whether an object is placed in the charging area. (S904) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed on the charging area. Can judge. Alternatively, an object detection may be performed according to whether a response signal for the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S906)

The wireless power transmission device may receive a response signal to the transmitted activation request signal. After (S908), when the response signal is received, the wireless power transmission device recognizes the detected object as a reception device and receives the response device. A transmission rate information request signal for (RATS: Request for Answer to Select) may be transmitted. (S910)

The wireless power transmission apparatus may receive transmission rate information. (S912) The transmission speed information received from the reception device supports the short-range communication by the receiving device, and may define a data transmission rate for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication.

11 is an exemplary view for explaining an example of a short-range communication transmission speed detected by the wireless power transmitter according to the embodiment of FIG. 9. Referring to FIG. 11, the example diagrams (a) and (b) of FIG. 11 may be an example of transmission speed information received from the reception device by the wireless power transmission device. (a) The exemplary diagram may be a case where the wireless power transmission apparatus receives only one transmission rate for data transmission and reception from the reception apparatus. Also, the (b) example diagram may be a case where the wireless power transmission apparatus receives a plurality of transmission speeds for data transmission and reception from the reception apparatus.

As described above, the wireless power transmission device may receive one or a plurality of transmission rate information as a response signal corresponding to the transmission rate information requested by the reception device.

The wireless power transmission apparatus may determine whether the received transmission rate information exceeds the reference number. (S914) The reference number may be one of each of the transmission rate and the reception rate.

When the number of transmission rates received exceeds the reference number as illustrated in FIG. 11(b) based on the determination result, the wireless power transmission device transmits the transmission rate when it is determined that the number of transmission rates is plural. A short-range communication identifier of a receiving device may be confirmed. (S916) The short-range communication identifier may include and receive the transmission rate information. For example, when the number of transmission speeds received by the wireless power transmission device exceeds the reference number as shown in FIG. 11(b), it may be defined that the device placed in the charging area is a wireless power reception device supporting short-range communication. That is, the wireless power receiving apparatus supporting short-range communication may transmit a short-range communication identifier including a plurality of transmission speed information as a response signal of the transmission speed information request signal of the wireless power transmission apparatus.

When the short-range communication identifier is confirmed, the wireless power transmission device may select one of the plurality of received transmission rates to transmit and receive data (S918), that is, as illustrated in FIG. 11 (c). The wireless power transmitter may select one of a plurality of transmission speeds received from the wireless power receiver. The transmission speeds of the data transmission and reception may be the same or may be set differently.

The wireless power transmitter may perform short-range communication with the wireless power receiver according to the selected transmission speed and execute a short-range communication application accordingly. (S920) For example, the short-range communication application starts a vehicle or uses a user in the vehicle. It may include actions according to information.

On the other hand, the wireless power transmission apparatus determines whether the received transmission rate information exceeds the reference number (S914), and as a result of the determination, if the received transmission rate number is less than the reference number as illustrated in (a) of FIG. The short-range communication identifier of the transmitted receiving device may be checked. (S922) The short-range communication identifier may be received including the transmission rate information. For example, when the number of transmission speeds received by the wireless power transmission apparatus is equal to or less than the reference number as shown in FIG. 11(a), for example, when the transmission and reception transmission speeds are each one, it may be defined as a short range communication card. That is, the short-range communication card may transmit a short-range communication identifier including one transmission rate information as a response signal of the transmission speed information request signal of the wireless power transmission apparatus.

When the short-range communication identifier is confirmed, the wireless power transmission apparatus may execute short-range communication and short-range communication application according to the short-range communication card according to the received transmission speed. (S924) For example, the short-range communication application starts the vehicle or It may include operations according to user usage information in the vehicle.

Thereafter, when the short-range communication operation mode according to the short-range communication card is completed, the wireless power transmission apparatus may output a user alarm informing of the request to remove the short-range communication card. (S926) For example, the short-range communication card in the charging area When the wireless power receiver is mounted in the existing state, the wireless power transmitter transmits power for wireless charging. In this case, the short-range communication card may be damaged by power transmission for wireless charging. Accordingly, the wireless power transmission apparatus may output a user alarm informing that the short-range communication card is to be removed from the charging area according to an operation that may occur later. As a result, it is possible to prevent a state in which a short-range communication card may be damaged by a wireless charging operation.

10 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 10, the wireless power transmitter may transmit a predetermined power signal for sensing the receiver. (S1002) Here, the power signal for sensing the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter may detect whether an object is placed in the charging area (S1004). For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed on the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal for the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S1006)

The wireless power transmitter may receive a response signal to the transmitted activation request signal. (S1008) After the wireless power transmitter receives the response signal, the wireless power transmitter recognizes the detected object as a receiver and receives the signal. A transmission rate information request signal for (RATS: Request for Answer to Select) may be transmitted. (S1010)

The wireless power transmission apparatus may receive transmission speed information. (S1012) The transmission speed information received from the reception apparatus supports short-range communication by the receiving apparatus, and may define a data transmission speed for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication.

11 is an exemplary view for explaining an example of a short-range communication transmission speed detected by the wireless power transmission apparatus according to the embodiment of FIG. 10. Referring to FIG. 11, the example diagrams (a) and (b) of FIG. 11 may be an example of transmission speed information received from the reception device by the wireless power transmission device. (a) The exemplary diagram may be a case where the wireless power transmission apparatus receives only one transmission rate for data transmission and reception from the reception apparatus. Also, the (b) example diagram may be a case where the wireless power transmission apparatus receives a plurality of transmission speeds for data transmission and reception from the reception apparatus.

As described above, the wireless power transmission device may receive one or a plurality of transmission rate information as a response signal corresponding to the transmission rate information requested by the reception device.

The wireless power transmission apparatus may determine whether the received transmission rate information exceeds a reference number. (S1014) The reference number may be one of both transmission rate and reception rate.

The wireless power transmission apparatus determines whether the received transmission speed information exceeds the reference number (S1014), and when the determined transmission number is confirmed to be less than or equal to the reference number as illustrated in FIG. The short-range communication identifier of the transmitted receiving device may be checked. (S1016) The short-range communication identifier may be received by including the transmission rate information. For example, when the number of transmission speeds received by the wireless power transmission apparatus is less than or equal to the reference number as shown in FIG. 11(a), that is, each of the transmission and reception transmission speeds may be defined as a short-range communication card. That is, the short-range communication card may transmit a short-range communication identifier including one transmission rate information as a response signal of the transmission speed information request signal of the wireless power transmission apparatus.

When the short-range communication identifier is confirmed, the wireless power transmission apparatus may execute other short-range communication and short-range communication applications on the short-range communication card according to the received transmission speed. (S1018) For example, the short-range communication application starts or starts the vehicle. It may include operations according to user usage information in the vehicle.

Thereafter, when the short-range communication operation mode according to the short-range communication card is completed, the wireless power transmission apparatus may output a user alarm informing of the request to remove the short-range communication card. (S1020) For example, the short-range communication card in the charging area When the wireless power receiver is mounted in the existing state, the wireless power transmitter transmits power for wireless charging. In this case, the short-range communication card may be damaged by power transmission for wireless charging. Accordingly, the wireless power transmission apparatus may output a user alarm informing that the short-range communication card is to be removed from the charging area according to an operation that may occur later. As a result, it is possible to prevent a state in which a short-range communication card may be damaged by a wireless charging operation.

Meanwhile, the wireless power transmitter determines whether the received transmission rate information exceeds the reference number (S1014), and as a result, when the received transmission rate number exceeds the reference number as illustrated in FIG. 11(b), that is, a plurality If it is confirmed, the short-range communication identifier of the receiving device that has transmitted the checked transmission rate can be checked. (S1022) The short-range communication identifier can be received including the transmission rate information.

When the number of received transmission speeds exceeds the reference number as shown in FIG. 11(b), the wireless power transmission device may determine whether the identified short range communication identifiers are plural. (S1024) For example, when checking the short-range communication identifier, the wireless power transmission device may be a case where there are a plurality of receiving devices supporting short-range communication. Alternatively, when the short-range communication card and the wireless power receiving device supporting short-range communication overlap or coexist, the wireless power transmitting device may detect a plurality of short-range communication identifiers. In this case, it may be a case where the short-range communication card and the wireless power receiving device supporting short-range communication each transmit a response signal to the requested short-range communication detection signal from the wireless power transmission device.

The wireless power transmitter may be defined as coexistence of a short-range communication card and a wireless power receiver supporting short-range communication when there are multiple detected short-range communication identifiers. Therefore, the wireless power transmission device may output an alarm to remove either the short-range communication card or the short-range communication support wireless power receiving device. That is, a user alarm may be output to notify the user that a plurality of short-range communication identifiers are detected and to inform the user of selection or removal of the device (S1026).

On the other hand, the wireless power transmitter determines whether the identified short-range communication identifiers are plural (S1024), and when the identified short-range communication identifiers are not plural, the detected device is defined as a wireless power receiving device supporting short-range communication. can do. Accordingly, when the short-range communication identifier is confirmed, the wireless power transmission apparatus may select one of the plurality of received transmission rates to transmit and receive data (S1028), that is, the exemplary diagram (c) of FIG. 11. Likewise, the wireless power transmission device may select one of a plurality of transmission rates received from the wireless power reception device.

The wireless power transmitter may perform short-range communication with the wireless power receiver according to the selected transmission speed and execute a short-range communication application accordingly. (S1030) For example, the short-range communication application starts a vehicle or uses a user in the vehicle. It may include actions according to information.

12 is a flowchart of an operation of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 12, the wireless power transmitter may transmit a predetermined power signal for detecting the receiver. (S1202) Here, the power signal for detecting the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter can detect whether an object is placed in the charging area. (S1204) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed in the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal to the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S1206)

The wireless power transmission device may receive a response signal to the transmitted activation request signal. (S1208) After the wireless power transmission device receives the response signal, the wireless power transmission device recognizes the detected object as a reception device and sends it to the reception device. A transmission rate information request signal (RATS: Request for Answer to Select) may be transmitted. (S1210)

The wireless power transmission apparatus may receive transmission speed information. (S1212) The transmission speed information received from the reception apparatus supports short-range communication by the receiving apparatus, and may define a data transmission speed for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication. In addition, the transmission speed information may receive a number of transmission speeds equal to or less than the reference number, or a transmission speed exceeding the reference number, depending on the type of the reception device. The reference number may be one for each of the transmission rate and the transmission rate. That is, the transmission rate information may be received one by one or a plurality of transmission rates and reception rates depending on the type of the receiving device.

The wireless power transmitter can measure the impedance according to the sensed receiver when the transmission rate information is received. (S1214) The wireless power transmitter can detect a high impedance change when a conductive object is placed in the charging area, Conversely, if a non-conductive object is placed, there may be little or no change in impedance.

The wireless power transmitter may measure impedance and determine whether the measured impedance is greater than or equal to the reference impedance. (S1216) At this time, the reference impedance may be an impedance value measured when an object is not placed in the charging area or may be greater than that. It may be a value smaller than the impedance value measured when a conductive object such as a wireless power receiver is placed.

As a result of the determination, the wireless power transmitter may check the short-range communication identifier received from the receiving device when the measured impedance is not greater than the reference impedance, that is, when the measured impedance is less than the reference impedance. (S1218) For example, When the measured impedance is less than the reference impedance, the power transmission device may be defined as a short-range communication card placed in the charging area. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may check the short-range communication identifier and execute a short-range communication application corresponding thereto. (S1220) For example, the short-range communication application may include starting the vehicle or operating according to user usage information in the vehicle. have.

On the other hand, if the measured impedance is equal to or greater than the reference impedance as a result of determining whether the measured impedance is greater than or equal to the reference impedance (S1216), the number of transmission rates received from the receiving device may be determined (S1222). That is, the wireless power transmission device may determine whether the transmission rate information received from the reception device exceeds a reference number.

When the determined transmission speed information is determined to be less than or equal to the reference number, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission rate. (S1224) It can be received including. In this case, when the number of transmission speeds is less than or equal to the reference number, and the previously measured impedance is greater than or equal to the reference impedance, the wireless power receiving device that does not support short-range communication with the receiving device coexists (overlaps). Can be defined. That is, the wireless power transmitter has a value greater than or equal to a reference impedance by the wireless power receiver, and receives a number of transmission speeds below the reference number from the short range communication card.

When the short-range communication identifier is confirmed, the wireless power transmission device may execute a short-range communication card and short-range communication and short-range communication applications according to the received transmission speed. (S1226) For example, the short-range communication application starts the vehicle or the user in the vehicle. And operation according to usage information.

Thereafter, when the wireless power transmission apparatus executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S1228) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, the short-range communication card may be damaged by the applied power. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

Meanwhile, when the number of received transmission speeds exceeds the reference number, that is, when the number of received wireless transmission speeds is determined to be plural, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission rate. (S1230) Can be received by including the transmission rate information. For example, when the number of transmission speeds exceeds the reference number, a device placed in the charging area may be defined as a terminal supporting short-range communication. That is, in the wireless power receiving apparatus supporting short-range communication, the measured impedance is greater than or equal to the reference impedance, and a short-range communication identifier including a plurality of transmission rate information may be transmitted to the wireless power transmitting apparatus.

When the short-range communication identifier is confirmed, the wireless power transmission device may select one of the plurality of received transmission rates to transmit and receive data. (S1232) The transmission rate has the same data transmission and reception transmission rate. Or each can be set differently.

The wireless power transmitter may perform short-range communication with the wireless power receiver according to the selected transmission speed, and execute a short-range communication application accordingly. (S1236) For example, the short-range communication application starts a vehicle or uses a user in the vehicle. It may include actions according to information.

After the short-range communication application is executed, the wireless power transmitter may initiate a wireless charging mode according to user authentication executed in the short-range communication application. (S1236)

13 is a flowchart illustrating an operation of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 13, the wireless power transmitter may transmit a predetermined power signal for detecting the receiver. (S1302) Here, the power signal for detecting the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter can detect whether an object is placed in the charging area. (S3204) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed in the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal to the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S1306)

The wireless power transmission device may receive a response signal to the transmitted activation request signal. (S1308) After the wireless power transmission device receives the response signal, the wireless power transmission device recognizes the detected object as a reception device and sends it to the reception device. A transmission rate information request signal (RATS: Request for Answer to Select) may be transmitted. (S1310)

The wireless power transmission apparatus may receive transmission speed information. (S1312) The transmission speed information received from the reception apparatus supports short-range communication by the receiving apparatus, and may define a data transmission speed for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication. In addition, the transmission rate information may receive a transmission rate number less than or equal to the reference number, or a transmission rate exceeding the reference number, depending on the type of the receiving device. The reference number may be one for each of the transmission rate and the transmission rate. That is, the transmission rate information may be received one by one or a plurality of transmission rates and reception rates depending on the type of the receiving device.

When the transmission speed information is received, the wireless power transmission device can measure the impedance according to the detected reception device. (S1314) The wireless power transmission device can detect a high impedance change amount when a conductive object is placed in the charging area, Conversely, if a non-conductive object is placed, there may be little or no change in impedance.

The wireless power transmitter may measure impedance and determine whether the measured impedance is greater than or equal to the reference impedance. (S1316) At this time, the reference impedance may be an impedance value measured when an object is not placed in a charging area or may be greater than that. It may be a value smaller than the impedance value measured when a conductive object such as a wireless power receiver is placed.

As a result of the determination, the wireless power transmitter may check the short-range communication identifier received from the receiving device when the measured impedance is not greater than the reference impedance, that is, when the measured impedance is less than the reference impedance. (S1318) For example, wireless When the measured impedance is less than the reference impedance, the power transmission device may be defined as a short-range communication card placed in the charging area. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may check the short-range communication identifier and execute a short-range communication application corresponding thereto. (S1320) For example, the short-range communication application may include starting the vehicle or operating according to user usage information in the vehicle. have.

On the other hand, the wireless power transmitter determines whether the measured impedance is greater than or equal to the reference impedance (S1316), and if the measured impedance is greater than or equal to the reference impedance, the number of transmission rates received from the receiving device may be determined (S1322). That is, the wireless power transmission device may determine whether the transmission rate information received from the reception device exceeds a reference number.

When the determined transmission speed information is determined to be less than or equal to the reference number, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission rate. (S1324) The short-range communication identifier receives the transmission speed information. It can be received including. In this case, when the number of transmission speeds is less than or equal to the reference number, and the previously measured impedance is greater than or equal to the reference impedance, the wireless power receiving device that does not support short-range communication with the receiving device coexists (overlaps). Can be defined. That is, the wireless power transmitter has a value greater than or equal to a reference impedance by the wireless power receiver, and receives a number of transmission speeds below the reference number from the short range communication card.

When the short-range communication identifier is confirmed, the wireless power transmission apparatus may execute a short-range communication card and short-range communication and short-range communication applications according to the received transmission speed. (S1326) For example, the short-range communication application starts the vehicle or the user in the vehicle. And operation according to usage information.

Thereafter, when the wireless power transmission device executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S1328) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, the short-range communication card may be damaged by the applied power. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

On the other hand, if the number of transmission speeds exceeded the reference number, that is, when the wireless power transmission device is determined to be plural, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission rate. (S1330) Can be received by including the transmission rate information. For example, when the number of transmission speeds exceeds the reference number, a device placed in the charging area may be defined as a terminal supporting short-range communication. That is, the wireless power receiving apparatus supporting short-range communication has a measured impedance greater than or equal to a reference impedance, and may transmit a short-range communication identifier including a plurality of transmission speed information.

When the number of received transmission speeds exceeds the reference number as shown in FIG. 11(b), the wireless power transmission device may determine whether the identified short range communication identifiers are plural. (S1332) For example, when checking the short-range communication identifier, the wireless power transmission device may be a case where there are a plurality of receiving devices supporting short-range communication. Alternatively, when the short-range communication card and the wireless power receiving device supporting short-range communication overlap or coexist, the wireless power transmitting device may detect a plurality of short-range communication identifiers. In this case, it may be a case where the short-range communication card and the wireless power receiving device supporting short-range communication each transmit a response signal to the requested short-range communication detection signal from the wireless power transmission device.

The wireless power transmitter may be defined as coexistence of a short-range communication card and a wireless power receiver supporting short-range communication when there are multiple detected short-range communication identifiers. Therefore, the wireless power transmission device may output an alarm to remove either the short-range communication card or the short-range communication support wireless power receiving device. That is, a user alarm may be output to notify the user that a plurality of short-range communication identifiers are detected, and to select a user or to remove the device. (S1334)

14 is a flowchart illustrating an operation of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 14, the wireless power transmitter may transmit a predetermined power signal for detecting the receiver. (S1402) Here, the power signal for detecting the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter can detect whether an object is placed in the charging area. (S1404) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed in the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal to the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S1406)

The wireless power transmission device may receive a response signal to the transmitted activation request signal. (S1408) After the wireless power transmission device receives the response signal, the wireless power transmission device recognizes the detected object as a reception device and sends it to the reception device. A transmission rate information request signal (RATS: Request for Answer to Select) may be transmitted. (S1410)

The wireless power transmission device may receive transmission rate information. (S1412) The transmission rate information received from the reception device supports short-range communication by the receiving device, and may define a data transmission rate for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication. In addition, the transmission rate information may receive a transmission rate number less than or equal to the reference number, or a transmission rate exceeding the reference number, depending on the type of the receiving device. The reference number may be one for each of the transmission rate and the transmission rate. That is, the transmission rate information may be received one by one or a plurality of transmission rates and reception rates depending on the type of the receiving device.

When the transmission speed information is received, the wireless power transmission device can measure the impedance according to the sensed reception device. (S1414) The wireless power transmission device can detect a high impedance change when a conductive object is placed in the charging area, Conversely, if a non-conductive object is placed, there may be little or no change in impedance.

The wireless power transmitter may measure the impedance and determine whether the measured impedance is greater than or equal to the reference impedance. (S1416) At this time, the reference impedance may be an impedance value measured when an object is not placed in the charging area or may be greater than that. It may be a value smaller than the impedance value measured when a conductive object such as a wireless power receiver is placed.

As a result of the determination, the wireless power transmission device may check the short-range communication identifier received from the receiving device when the measured impedance is not greater than the reference impedance, that is, when the measured impedance is less than the reference impedance. (S1418) When the measured impedance is less than the reference impedance, the power transmission device may be defined as a short-range communication card placed in the charging area. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may check the short-range communication identifier and execute a short-range communication application corresponding thereto. (S1420) For example, the short-range communication application may include starting the vehicle or operating according to user usage information in the vehicle. have.

On the other hand, if the measured impedance is equal to or greater than the reference impedance as a result of determining whether the measured impedance is greater than or equal to the reference impedance (S1416), the number of transmission rates received from the receiving device may be determined (S1422). That is, the wireless power transmission device may determine whether the transmission rate information received from the reception device exceeds a reference number.

When the determined transmission speed information is determined to be less than or equal to the reference number, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission speed. (S1424) It can be received including. In this case, when the number of transmission speeds is less than or equal to the reference number, and the previously measured impedance is greater than or equal to the reference impedance, the wireless power receiving device that does not support short-range communication with the receiving device coexists (overlaps). Can be defined. That is, the wireless power transmitter has a value greater than or equal to a reference impedance by the wireless power receiver, and receives a number of transmission speeds below the reference number from the short range communication card.

When the short-range communication identifier is confirmed, the wireless power transmitter may execute a short-range communication card and short-range communication and short-range communication applications according to the received transmission speed. (S1426) For example, the short-range communication application starts a vehicle or a user in the vehicle. And operation according to usage information.

Thereafter, when the wireless power transmission device executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S1428) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, the short-range communication card may be damaged by the applied power. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

On the other hand, the wireless power transmission device may check the tag response information (SAKL Select Acknowledge) received from the receiving device when it is determined that the number of received transmission rates exceeds the reference number, that is, a plurality. The tag response information may be a response signal received from the receiving device when the receiving device transmitting the transmission speed information and the short-range communication identifier to the wireless power receiving device is detected. The tag response information may be received with a short range communication identifier or may be received in a separate sequence.

The wireless power transmitter may check tag response information and determine whether the value of the tag response information has a first value. (S1432) Specifically, the wireless power transmitter checks tag response information, and measures the impedance. , Based on the number of transmission speeds and the tag response information, it is possible to determine what kind of the reception device is. For example, in the wireless power transmitter, when the measurement impedance is greater than or equal to the reference impedance and the number of transmission speeds exceeds the reference number, the value of the tag response information is the first value. It can be defined as a power receiver. That is, in the wireless power receiving apparatus supporting short-range communication, the measured impedance is greater than or equal to the reference impedance, and the short-range communication identifier including a plurality of transmission speed information and tag response information having the first value can be transmitted to the wireless power transmitting apparatus. . At this time, the first value may have a value of 0X20. Accordingly, the wireless power transmission device may check the short-range communication identifier of the receiving device when the tag response information has the first value. (S1434) The short-range communication identifier may be received including the transmission rate information.

When the short-range communication identifier is confirmed, the wireless power transmission device may select one of the plurality of received transmission rates to transmit and receive data. (S1436) The transmission rate has the same data transmission and reception transmission rate. Or each can be set differently.

The wireless power transmitter may perform short-range communication with the wireless power receiver according to the selected transmission speed, and execute a short-range communication application accordingly. (S1438) For example, the short-range communication application starts a vehicle or uses a user in the vehicle. It may include actions according to information.

After the short-range communication application is executed, the wireless power transmitter may initiate a wireless charging mode according to user authentication executed in the short-range communication application. (S1440)

On the other hand, the wireless power transmission device checks the tag response information, and determines whether the value of the tag response information has a first value (S1432), if the tag response information does not have a first value, the receiving device It can be defined as a case where a foreign object (FO) and a short-range communication card coexist. That is, the measurement impedance is measured to be greater than or equal to the reference impedance by the foreign material, and the number of transmission speeds can be detected by the short-range communication card. Accordingly, when the checked tag response information is not the first value, a user alarm indicating a request to remove the short range communication card may be output. (S1428)

15 is a flowchart illustrating an operation of a wireless power transmission apparatus according to another embodiment.

Referring to FIG. 15, the wireless power transmitter may transmit a predetermined power signal for sensing the receiver. (S1502) Here, the power signal for sensing the receiver may be repeatedly transmitted at predetermined time intervals. At this time, a power signal of a predetermined period may be transmitted during the repetition section, but is not limited thereto, and a continuous power signal may be transmitted during the repetition section. For example, the power signal for detecting a receiver may be a ping signal or a short-range communication detection signal for detecting a short-range communication receiver. In the present embodiment, for example, the detection of an object placed in the charging area operates based on the output of the short-range communication signal and the response signal accordingly. However, the present invention is not limited thereto, and an object placed in the charging area may be sensed by transmission of a detection signal or an operation such as a sensor.

The wireless power transmitter can detect whether an object is placed in the charging area. (S1504) For example, the wireless power transmitter detects a change in the intensity of the magnetic field transmitted through the transmitting coil and determines whether an object is placed in the charging area. can do. Alternatively, an object detection may be performed according to whether a response signal to the short-range communication detection signal is received from an object placed in the charging area by transmitting a short-range communication detection signal.

When the wireless power transmitter detects that an object is placed in the charging area, it may transmit an activation request signal (Request A or WakeUp A) to the detected object. (S1506)

The wireless power transmission device may receive a response signal for the transmitted activation request signal. (S1508) After the wireless power transmission device receives the response signal, the wireless power transmission device recognizes the detected object as a reception device and transmits it to the reception device. A transmission rate information request signal (RATS: Request for Answer to Select) may be transmitted. (S1510)

The wireless power transmission apparatus may receive transmission speed information. (S1512) The transmission speed information received from the reception apparatus supports short-range communication by the receiving apparatus, and may define a data transmission speed for the short-range communication. . That is, the receiving device may provide transmission rate information for performing short-range communication between the transmitting device and the receiving device when the device supports short-range communication. In addition, the transmission rate information may receive a transmission rate number less than or equal to the reference number, or a transmission rate exceeding the reference number, depending on the type of the receiving device. The reference number may be one for each of the transmission rate and the transmission rate. That is, the transmission rate information may be received one by one or a plurality of transmission rates and reception rates depending on the type of the receiving device.

When the transmission speed information is received, the wireless power transmission device can measure the impedance according to the sensed reception device. (S1514) The wireless power transmission device can detect a high impedance change when a conductive object is placed in the charging area, Conversely, if a non-conductive object is placed, there may be little or no change in impedance.

The wireless power transmitter may measure impedance and determine whether the measured impedance is greater than or equal to the reference impedance. (S1516) At this time, the reference impedance may be an impedance value measured when an object is not placed in the charging area or may be greater than that. It may be a value smaller than the impedance value measured when a conductive object such as a wireless power receiver is placed.

As a result of the determination, the wireless power transmitter may check the short-range communication identifier received from the receiving device when the measured impedance is not greater than the reference impedance, that is, when the measured impedance is less than the reference impedance. (S1518) For example, When the measured impedance is less than the reference impedance, the power transmission device may be defined as a short-range communication card placed in the charging area. That is, the short-range communication card may have a non-conductive or conductive object on a part of the card, and the impedance value detected by the wireless power transmitter may be smaller than the impedance value when the wireless power receiver is placed.

The wireless power transmitter may identify a short-range communication identifier and execute a short-range communication application corresponding thereto. (S1520) For example, the short-range communication application may include starting a vehicle or operating according to user usage information in the vehicle. have.

On the other hand, if the measured impedance is equal to or greater than the reference impedance as a result of determining whether the measured impedance is greater than or equal to the reference impedance (S1516), the number of transmission rates received from the receiving device may be determined (S1522). That is, the wireless power transmission apparatus may determine whether the transmission speed information received from the reception apparatus exceeds a reference number.

When the determined transmission speed information is determined to be less than or equal to the reference number, the wireless power transmission device may check the short-range communication identifier of the receiving device that has transmitted the transmission rate. (S1524) It can be received including. In this case, when the number of transmission speeds is less than or equal to the reference number, and the previously measured impedance is greater than or equal to the reference impedance, the wireless power receiving device that does not support short-range communication with the receiving device coexists (overlaps). Can be defined. That is, the wireless power transmitter has a value greater than or equal to a reference impedance by the wireless power receiver, and receives a number of transmission speeds less than or equal to the reference number from the short range communication card.

When the short-range communication identifier is confirmed, the wireless power transmission device may execute a short-range communication card and short-range communication and short-range communication applications according to the received transmission speed. (S1526) For example, the short-range communication application starts the vehicle or the user in the vehicle. And operation according to usage information.

Thereafter, when the wireless power transmission apparatus executes the wireless charging mode after the short-range communication application is executed, it may output a user alarm informing the request to remove the short-range communication card before starting the wireless charging mode. (S1528) When the wireless charging is initiated when the short-range communication card and the wireless power receiving device are overlapped, the short-range communication card may be damaged by the applied power. Therefore, by outputting a user alarm informing the user to remove the card on the charging area when the user has a short-range communication card, damage to the short-range communication card due to initiation of wireless charging may not occur.

On the other hand, when the number of transmission speeds exceeds the reference number, that is, when the wireless power transmission device is determined to be a plurality, the wireless power transmission device may check whether the NFC-DEP (Data Exchange Protocol) response signal is received from the reception device (S1530). The NFC-DEP response signal may be a response signal for whether the reception device operates in a read/write mode. That is, the wireless power transmitter may check whether the wireless power receiver supports short-range communication according to whether an NFC-DEP response signal is received from the receiver. The NFC-DEP response signal may be received with a short range communication identifier or may be received in a separate sequence.

Accordingly, the wireless power transmission device may check whether the NFC-DEP response signal has been received, and if the NFC-DEP response signal has been received, the short-range communication identifier of the reception device may be checked. (S1532) That is, short-range communication is supported. In the wireless power receiving device, the measured impedance is greater than or equal to a reference impedance, and a short-range communication identifier and a NFC-DEP response signal including a plurality of transmission speed information can be transmitted to the wireless power transmitting device.

When the short-range communication identifier is confirmed, the wireless power transmitter may select one of the plurality of received transmission speeds to perform data transmission and reception. (S1534) The data transmission and reception transmission speeds are the same. Or each can be set differently.

The wireless power transmitter may perform short-range communication with the wireless power receiver according to the selected transmission speed, and execute a short-range communication application accordingly. (S1536) For example, the short-range communication application starts a vehicle or uses a user in the vehicle. It may include operations according to information.

After the short-range communication application is executed, the wireless power transmitter may initiate a wireless charging mode according to user authentication executed in the short-range communication application. (S1538)

On the other hand, the wireless power transmission device confirms whether or not the Tae NFC-DEP response signal is received, and if the NFC-DEP response signal is not received, the receiving device is a case where a foreign object (FO) and a short-range communication card coexist. It can be defined as That is, the measurement impedance is measured to be greater than or equal to the reference impedance by the foreign material, and the number of transmission rates may be detected by the short-range communication card. Accordingly, when the confirmed NFC-DEP response signal is not received, a user alarm indicating a request to remove the short-range communication card may be output. (S1528)

The above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Features, structures, effects, and the like described in the above-described embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, and the like exemplified in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been mainly described above, this is merely an example and does not limit the present invention, and those skilled in the art to which the present invention pertains are exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

Claims (29)

A wireless power transmitter for transmitting wireless power;
A short-range communication unit performing wireless communication; And
Includes; a control unit for controlling the wireless power transmitter and the short-range communication unit,
The control unit
A wireless power transmitter that controls the operation of the wireless power transmitter based on the transmission speed information of the short-range communication receiver. According to claim 1,
The control unit
If the number of transmission rates is less than or equal to the reference number, a wireless power transmission apparatus that does not perform the operation of the wireless power transmission unit. According to claim 1,
The control unit
When the number of transmission speeds exceeds the reference number, the wireless power transmission device outputs a user alarm for removing the short-range communication receiving device without performing the operation of the wireless power transmitter. In claim 3,
The control unit
A wireless power transmission device that selects one of the transmission rates, executes a short-range communication application at the selected transmission rate, and outputs the user alarm. According to claim 1,
The control unit
If the number of transmission speeds exceeds the reference number, the short-range communication identifier received from the short-range communication receiving device, and if the plurality of identified identifiers, the wireless power transmission device for outputting a user alarm to remove the short-range communication receiving device. A wireless power transmitter for transmitting wireless power;
A short-range communication unit performing wireless communication; And
Includes; a control unit for controlling the wireless power transmitter and the short-range communication unit,
The control unit
A wireless power transmitter for controlling the operation of the wireless power transmitter based on the impedance change of the short-range communication unit and the transmission speed information of the short-range communication receiver. The method of claim 6,
The control unit
If the change in impedance is greater than or equal to the reference impedance, and the number of transmission rates is less than or equal to the reference number, the wireless power transmission device that outputs a user alarm to remove the short-range communication receiver without performing an operation of the wireless power transmitter. The method of claim 7,
The control unit
A wireless power transmission device that outputs the user alarm after executing a short-range communication application. The method of claim 6,
The control unit
If the change in impedance is less than the reference impedance and the number of transmission rates is less than or equal to the reference number, a wireless power transmission device that does not perform the operation of the wireless power transmitter. The method of claim 6,
The control unit
If the change in impedance is less than the reference impedance, and the number of transmission rates exceeds the reference number, a wireless power transmission device that does not perform the operation of the wireless power transmitter. The method of claim 6,
The control unit
If the change in impedance is greater than the reference impedance, and the number of transmission speeds exceeds the reference number, a wireless power transmission device that performs an operation of the wireless power transmitter. The method of claim 11,
The control unit
A wireless power transmission apparatus that selects one of the transmission speeds, executes a short range communication application at the selected transmission speed, and then performs an operation of the wireless power transmission unit. The method of claim 6,
The control unit
If the impedance change is greater than or equal to the reference impedance, and the number of transmission speeds exceeds the reference number, a short-range communication identifier received from the short-range communication receiving device is checked, and if there are a plurality of identified identifiers, a user removing the short-range communication receiving device Wireless power transmission device that outputs an alarm. The method of claim 6,
The control unit
If the impedance change is greater than or equal to the reference impedance, and the number of transmission rates exceeds the reference number, check the tag response information (SAK) of the short-range communication receiving device, and when the tag response information is confirmed to a predetermined value, the wireless A wireless power transmitter that performs the operation of the power transmitter. The method of claim 14
The control unit
When the tag response information is not a preset value, a wireless power transmission device that outputs a removal user alarm of the short-range communication receiving device. The method of claim 6,
The control unit
If the impedance change is greater than or equal to the reference impedance, and the number of transmission rates exceeds the reference number, check whether a response signal of a data transmission/reception (DEP) mode is received from the short-range communication receiving device, and when the response signal is confirmed, the wireless power transmitter Wireless power transmission device that performs the operation of. The method of claim 16,
The control unit
If the response signal is not confirmed, a wireless power transmission device for outputting a user alarm to remove the short-range communication receiving device. Detecting an object disposed in the charging area;
Transmitting a transmission rate information request signal of a short-range communication receiving device;
Receiving the transmission rate information;
Checking the impedance change of the short-range communication unit;
And determining whether a wireless power transmission operation is performed based on the impedance change of the short-range communication unit and the received transmission rate information. The method of claim 18,
Determining whether the wireless power transmission operation is
If the change in impedance is greater than or equal to the reference impedance, and the number of transmission rates is less than or equal to the reference number, the wireless power transmission method of outputting a user alarm to remove the short-range communication receiver without performing the wireless power transmission operation. The method of claim 19,
The step of outputting the alarm is
A wireless power transmission method for outputting a user alarm after executing a short-range communication application with the identified short-range communication identifier. The method of claim 18,
Determining whether the wireless power transmission operation is
If the impedance change is less than the reference impedance, the number of the transmission rate is less than the reference number, the wireless power transmission method does not perform the wireless power transmission operation. The method of claim 18,
Determining whether the wireless power transmission operation is
A method for transmitting wireless power that does not perform the wireless power transmission operation when the change in impedance is less than a reference impedance and the number of transmission rates exceeds a reference number. The method of claim 18,
Determining whether the wireless power transmission operation is
When the change in impedance is greater than or equal to a reference impedance, and the number of transmission rates exceeds a reference number, a method for transmitting wireless power to perform the wireless power transmission operation. The method of claim 23,
The wireless power transmission operation
A wireless power transmission method performed after selecting one of the transmission rates and executing a short range communication application at the selected transmission rate. The method of claim 18,
Determining whether the wireless power transmission operation is
If the impedance change is greater than or equal to the reference impedance, and the number of transmission rates exceeds the reference number, a short-range communication identifier received from the short-range communication receiving device is checked, and if there are a plurality of identified identifiers, a user alarm is removed from the short-range communication receiving device. Wireless power transmission method for outputting. The method of claim 18,
Determining whether the wireless power transmission operation is
If the impedance change is greater than or equal to the reference impedance, and the number of transmission rates exceeds the reference number, check the tag response information (SAK) received from the short-range communication receiving device, and when the tag response information is confirmed to a predetermined value, the wireless Wireless power transmission method for performing a power transmission operation. The method of claim 26,
A wireless power transmission method for outputting a removal user alarm of the short-range communication receiving device when the tag response information is not determined as a preset value. The method of claim 18,
Determining whether the wireless power transmission operation is
If the impedance change is greater than or equal to the reference impedance and the number of transmission rates exceeds the reference number, it is checked whether a response signal of a data transmission/reception (DEP) mode is received from the short-range communication receiving device, and when the response signal is confirmed, the wireless power Wireless power transmission method for performing a transmission operation. The method of claim 28,
If the response signal is not confirmed, the wireless power transmission method for outputting a user alarm to remove the short-range communication receiving device.

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