KR20200082430A - Apparatus and method for wireless charging - Google Patents

Abstract

The present invention relates to a wireless charging device which can reduce noise generated when the wireless charging device is not charged. According to an embodiment of the present invention, the wireless charging device comprises: a sensor unit detecting a change in capacitance; a charging unit wirelessly charging an object to be mounted; and a control unit controlling the charging unit to charge the object to be mounted. The control unit turns on the charging unit and turns off the sensor unit when the sensor unit detects the change in capacitance beyond a reference time.

Description

Wireless charging device and method {Apparatus and method for wireless charging}

The present invention relates to wireless charging technology. Specifically, the present invention relates to a technology for minimizing electromagnetic waves by turning on a charging unit only when wireless charging is required by mounting a capacitive sensor.

Recently, an example of using a wireless charger for charging an electronic device such as a mobile phone has been increasing for reasons such as user convenience improvement. Charging using a wireless charger refers to a technology that wirelessly transmits power from a charger to an electronic device such as a mobile phone.

Specifically, wireless power transmission technology (wireless power transmission or wireless energy transfer) is a technology that wirelessly transmits electric energy from a transmitter to a receiver using a magnetic field induction principle, and an electric motor using an electromagnetic induction principle in the 1800s. Transformers have been used, and since then, methods of transmitting electric energy by radiating electromagnetic waves such as radio waves, lasers, radio waves, and microwaves have also been attempted. Electric toothbrushes and some wireless shavers that we commonly use are actually charged with the principle of electromagnetic induction.

Until now, the energy transmission method using wireless can be largely classified into a magnetic induction method, an electromagnetic resonance method, and an RF transmission method using a short-wavelength radio frequency.

At this time, charging through the wireless charger is performed when the electronic device is mounted on the wireless charger or when the electronic device is within a certain distance range from the wireless charger. However, unlike wired charging connected to a separate connector, wireless charging must be preceded by charging according to the transmission and reception of a ping signal between the wireless charger and the electronic device.

Specifically, when the wireless charger periodically transmits a ping signal, and the electronic device that received it transmits a ping signal as a response signal, when the wireless charger receives the ping signal as the response signal, the connection between the wireless charger and the electromagnetic period is established. Is done.

However, the current wireless charger periodically transmits a ping signal even when the electronic device is mounted on the wireless charger or when the electronic device is not within a certain distance range from the wireless charger, and thus electromagnetic field noise (EMI) Etc.).

Accordingly, there is a demand for an invention that can reduce electromagnetic noise when the wireless charger is in a non-charged state.

Korean Patent Publication No. 10-2014-0099822

An object of the present invention is to reduce noise generated when the battery is in a non-charged state.

The problems of the present invention are not limited to the problems mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

A wireless charging device according to an embodiment of the present invention includes a sensor unit for sensing a change in capacitance; A charging unit for wirelessly charging the object to be mounted; And a control unit controlling the charging unit so that the mounting object is charged, and the control unit turns on the charging unit and turns off the sensor unit when the sensor unit detects the change in the capacitance beyond a reference time. .

In one embodiment, the sensor unit may be a capacitive sensor.

In one embodiment, a communication unit for performing NFC communication with the mounting object may be further included.

In one embodiment, the control unit may control the communication unit to perform communication with the mounting object according to a preset mode or control the charging unit to charge the mounting object.

In one embodiment, the communication unit may include an NFC antenna.

In one embodiment, the NFC antenna may be disposed on the same substrate as the sensor unit.

In one embodiment, the sensor unit is configured to include an antenna, the antenna of the sensor unit and the NFC antenna may be used in common.

In one embodiment, when the preset mode is the first mode, the controller controls the charging unit to turn on the charging unit so that the mounting object is charged, but the first mode may be a mode in which only wireless charging is performed. have.

In one embodiment, the control unit controls the communication unit to perform communication with the mounting object by turning on the communication unit when the preset mode is the second mode, and turning on the charging unit so that the mounting object is charged. While controlling the charging unit, the second mode may be a mode for performing both wireless charging and NFC communication.

A wireless charging method according to an embodiment of the present invention includes a sensing step of sensing a change in capacitance through a sensor unit; A turn-off step of turning off the sensor unit when sensing the change in capacitance beyond a reference time in the sensing step; A turn-on step of turning on a charging section for wirelessly charging the object to be mounted when the change in capacitance exceeds the reference time in the sensing step; A ping signal transmission step of transmitting a ping signal from the charging unit to the mounting object when the charging unit is turned on in the turning-on step; And a control step of controlling the charging unit so that the mounted object is wirelessly charged when the ping signal is transmitted to the mounted object in the ping signal transmission step.

In one embodiment, the turn-on step turns on the charging unit or a communication unit performing NFC communication with the mounting object, and the ping signal transmission step transmits the ping signal to the mounting object from the charging unit or the communication unit, The control step may control the communication unit to perform communication with the mounting object according to a preset mode or control the charging unit to wirelessly charge the mounting object.

In one embodiment, the control step controls the charging unit to wirelessly charge the mounting object when the preset mode is the first mode, but the first mode may be a mode for performing only wireless charging.

In one embodiment, the control step comprises: checking whether the response unit receives a response signal according to the ping signal transmitted to the mounting object; Controlling the charging unit so that the mounting object is wirelessly charged when the response signal is received; And it may include the step of confirming whether the object is mounted during wireless charging.

In one embodiment, the control step may further include the step of turning on the sensor unit to detect the change in the electrostatic capacity again when the mounted object is detached during wireless charging.

In an embodiment, the control step controls the communication unit to perform communication with the mounting object when the preset mode is the second mode, and controls the charging unit so that the mounting object is charged, but the second The mode may be a mode for performing both wireless charging and NFC communication.

In one embodiment, the control step comprises: confirming that the communication unit and the charging unit receives a response signal according to the ping signal transmitted to the stationary object; Controlling the communication unit to perform communication with the mounting object when the response signal is received, and controlling the charging unit to wirelessly charge the mounting object; And it may include the step of confirming whether the object is mounted during wireless charging.

In one embodiment, the control step may further include the step of turning on the sensor unit to detect the change in the electrostatic capacity again when the mounted object is detached during wireless charging.

The present invention is equipped with a capacitive sensor in the wireless charging device to transmit a ping signal for charging only when an object is close to the wireless charging device.

Therefore, the present invention has an effect that the electromagnetic wave is significantly reduced when the wireless charging device is in the non-charged state because the ping signal is not transmitted when the wireless charging device is in the non-charged state.

Accordingly, the present invention has an effect of significantly reducing the harmfulness caused by electromagnetic waves that may be generated to a user close to the wireless charging device.

In addition, the present invention, the wireless charging device performs not only a wireless charging function, but also communicates with nearby electronic devices.

Therefore, the present invention has an effect of controlling a vehicle, etc., in which the wireless charging device is installed, through an electronic device close to the wireless charging device.

Accordingly, the present invention has an effect of increasing control convenience of a vehicle, etc., to a user using the wireless charging device.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 and 2 are views illustrating a process in which a conventional wireless charging device detects an object.
3 is a block diagram of a wireless charging device according to an embodiment of the present invention.
4 is a perspective view of a wireless charging device according to an embodiment of the present invention.
5 to 7 are flowcharts sequentially illustrating a wireless charging method according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Thus, in some embodiments, well-known process steps, well-known structures, and well-known techniques are not specifically described in order to avoid obscuring the present invention.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. Includes and/or comprising as used herein refers to the presence or addition of one or more other components, steps, operations and/or elements other than the components, steps, operations and/or elements mentioned. Used in a way that does not exclude. And, “and/or” includes each and every combination of one or more of the items mentioned.

In addition, the embodiments described herein will be described with reference to cross-sectional views and/or schematic drawings, which are ideal exemplary views of the present invention. Therefore, the shape of the exemplary diagram may be modified by manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to the manufacturing process. In addition, in each drawing shown in the present invention, each component may be illustrated to be slightly enlarged or reduced in consideration of convenience of description. The same reference numerals refer to the same components throughout the specification.

Hereinafter, a wireless charging device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

1 and 2 are views illustrating a process in which a conventional wireless charging device detects an object.

Referring to FIG. 1, when an object is not mounted in the conventional wireless charging device 1, a process of sensing the object may be confirmed.

Specifically, referring to Figure 1 (a), it can be seen that no object is mounted on the conventional wireless charging device 1. However, it can be confirmed that the conventional wireless charging device 1 transmits an analog ping signal at T1 intervals and a digital ping signal at T2 intervals as shown in FIG. 1(b). At this time, the analog ping signal means a signal that detects whether an object is approaching the conventional wireless charging device 1, and the digital ping signal detects whether an object that can be wirelessly charged to the conventional wireless charging device 1 is approaching. Means a signal.

Referring to FIG. 2, when an object is mounted in a conventional wireless charging device 1, a process of sensing the object can be confirmed.

Specifically, referring to Figure 2 (a), it can be seen that the mobile phone 2 is mounted on the conventional wireless charging device 1. Therefore, the conventional wireless charging device 1 transmits an analog ping signal at T3 intervals as shown in FIG. 2(b), and transmits a digital ping signal at T4 intervals. From the mobile phone 2, it can be seen that charging is performed.

That is, as shown in FIGS. 1 and 2, it can be seen that the conventional wireless charging device 1 continuously transmits the analog ping signal and the digital ping signal regardless of whether the mobile phone 2 is mounted. Accordingly, in the conventional wireless charging device 1, even when the mobile phone 2 is not already mounted, electromagnetic waves may be continuously generated, and the need to reduce such electromagnetic wave emerges.

3 is a block diagram of a wireless charging device according to an embodiment of the present invention. At this time, the wireless charging device 100 according to an embodiment of the present invention is 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-mounted form, a vehicle buried form, a vehicle mounted It may be configured in various forms such as a form, but for convenience of description, it will be described on the assumption that the wireless charging device 100 is in a vehicle embedded form.

Referring to FIG. 3, a wireless charging device 100 according to an embodiment of the present invention includes a sensor unit 110, a communication unit 120, a charging unit 130, and a control unit 140.

The sensor unit 110 detects a change in capacitance. In this case, the sensor unit 110 may be a capacitive sensor including an antenna.

Specifically, the sensor unit 110 detects a change in capacitance changed when an object approaches the sensor unit 110. For example, the sensor unit 110 may detect that the capacitance changes from 10 μF to 100 μF when an object approaches. At this time, the object may be an electronic device capable of wireless charging or an object that cannot be wirelessly charged. That is, the sensor unit 110 only detects a change in capacitance between the sensor unit 110 and the periphery of the sensor unit 110, but does not detect whether the object is an electronic device capable of wireless charging. This, as will be described later, is determined by the control unit 140 transmitting a ping signal through the communication unit 120 or the charging unit 130.

The change in capacitance detected by the sensor unit 110 is transmitted to the control unit 140.

On the other hand, if the sensor unit 110 detects a change in the capacitance beyond the reference time, the sensor unit 110 is turned off by the control unit 140. This will be described later.

The communication unit 120 performs NFC (Near Field Communication) communication with the object to be mounted. At this time, the communication unit 120 includes an NFC antenna.

Specifically, when the mounting object approaches the wireless charging device 100 and detects a change in capacitance in the sensor unit 110, the communication unit 120 is turned on by the control unit 140 to ping the mounting object. Send a signal. Thereafter, when the communication unit 120 receives a response signal for the ping signal transmitted from the mounting object, the communication unit 120 performs NFC communication with the mounting object. In this case, the object to be mounted may mean an electronic device capable of communication, such as a mobile phone.

For example, the communication unit 120 may receive a command to turn on the start of the vehicle equipped with the wireless charging device 100 transmitted from the object to be mounted. Thereafter, the communication unit 120 may transmit a command to turn on the vehicle to the ECU of the vehicle.

Meanwhile, in the wireless charging device 100 according to an embodiment of the present invention, the sensor unit 110 and the communication unit 120 may be configured with the same module. Specifically, the capacitive sensor and the NFC antenna may be disposed on the same substrate (PCB). Alternatively, the antenna of the capacitive sensor and the NFC antenna are configured with the same antenna and can be used in common in the wireless charging device 100 according to an embodiment of the present invention. Accordingly, the wireless charging device 100 according to an embodiment of the present invention may not include a separate substrate (PCB) or a separate antenna for sensing a change in capacitance. Accordingly, the cost of manufacturing the wireless charging device 100 and the weight reduction and integration effect of the wireless charging device 100 are generated.

The charging unit 130 wirelessly charges the mounting object.

Specifically, when the mounting object approaches the wireless charging device 100 and the sensor unit 110 detects a change in capacitance, the charging unit 130 is turned on by the control unit 140 to ping the mounting object. Send a signal. Thereafter, when the charging unit 130 receives a response signal to the ping signal transmitted from the mounting object, the charging unit 130 wirelessly charges the mounting object.

The control unit 140 turns off the sensor unit 110 and turns on the communication unit 120 and/or the charging unit 130 when the sensor unit 110 detects the change in capacitance beyond a reference time. In this case, the reference time refers to a time used as a reference for determining whether an object to perform NFC communication and/or wireless charging has approached through the wireless charging device 100.

That is, in the wireless charging device 100 according to an embodiment of the present invention, only the sensor unit 110 is initially turned on, the communication unit 120 and the charging unit 130 are turned off, and then the reference time in the sensor unit 110 There is an effect of blocking the generation of electromagnetic waves due to unnecessary ping signal transmission by turning on the communication unit 120 and/or the charging unit 130 only when the capacitance change is detected in excess of the above.

In addition, the wireless charging apparatus 100 according to an embodiment of the present invention turns on the communication unit 120 and/or the charging unit 130 only when the capacitance change is detected beyond a reference time, thereby turning a part of the user's body Alternatively, there is an effect of preventing false recognition due to a change in capacitance generated when an object or the like temporarily approaches the wireless charging device 100.

In addition, the wireless charging device 100 according to an embodiment of the present invention when the sensor unit 110 detects the change in the capacitance exceeding the reference time by turning off the sensor unit 110 to send and receive ping signals and wireless Damage to the sensor unit 110 due to power transmission is prevented.

The control unit 140 controls the communication unit 120 to perform communication with the mounting object according to a preset mode, or controls the charging unit 130 to wirelessly charge the mounting object.

At this time, the preset mode includes a mode for performing only wireless charging (hereinafter, a first mode) and a mode for performing both wireless charging and NFC communication (hereinafter, a second mode). In addition, the setting of the first mode or the second mode may be set by a user or automatically set by the wireless charging device 100 itself.

Specifically, when the preset mode is set to the first mode, the controller 140 controls the charging unit 130 to wirelessly charge the object to be mounted.

In addition, when the preset mode is set to the second mode, the control unit 140 controls the communication unit 120 to perform communication with the mounting object, and controls the charging unit 130 to wirelessly charge the mounting object. . Preferably, the control unit 140 controls the communication unit 120 to perform communication with the mounting object, so that the charging unit 130 can be controlled to wirelessly charge the mounting object after communication is terminated.

4 is a perspective view of a wireless charging device according to an embodiment of the present invention.

Referring to FIG. 4, in the wireless charging device 100 according to an embodiment of the present invention, electromagnetic waves are generated in the X-axis direction, the Y-axis direction, and the Z-axis direction. At this time, the electromagnetic wave generated in the X-axis direction, the Y-axis direction and the Z-axis direction in the wireless charging device 100 according to an embodiment of the present invention determines whether the communication unit 120 or the charging unit 130 transmits a ping signal. It depends.

On the other hand, the wireless charging device 100 according to an embodiment of the present invention, the communication unit 120 and / or only when the sensor unit 110 including the capacitive sensor exceeds the reference time to detect the change in the capacitance By turning on the charging unit 130, there is an effect of blocking the generation of electromagnetic waves due to unnecessary ping signal transmission.

Therefore, a vehicle to which the wireless charging device 100 according to an embodiment of the present invention is applied has an effect capable of significantly reducing the harmfulness of the human body due to electromagnetic waves.

Hereinafter, a wireless charging method according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7. At this time, a description of parts overlapping with those described with reference to FIGS. 1 to 4 will be omitted.

5 to 7 are flowcharts sequentially illustrating a wireless charging method according to an embodiment of the present invention.

5 is a diagram comprehensively showing a wireless charging method according to an embodiment of the present invention.

Referring to FIG. 5, the sensor unit 110 detects a change in capacitance changed when an object approaches the sensor unit 110 (S101).

Thereafter, the controller 140 checks whether the capacitance change detected in step S101 continues beyond the reference time (S103).

Thereafter, the control unit 140 turns off the sensor unit 110 when the change in capacitance detected in step S101 exceeds the reference time as a result of checking in step S103 (S105 ). Also, the control unit 140 turns on the communication unit 120 and/or the charging unit 130 (S107).

Meanwhile, if the capacitance change detected in step S101 is less than the reference time as a result of checking in step S103, the controller 140 returns to step S101.

Thereafter, the controller 140 checks whether the preset mode is the first mode (S109).

Thereafter, when the preset mode is the first mode as a result of checking in step S109, the controller 140 controls the charging unit 130 to perform a wireless charging operation (S111).

Meanwhile, when the preset mode is the second mode as a result of checking in step S109, the control unit 140 controls the communication unit 120 to perform an NFC communication operation (S113), and then controls the charging unit 130 to wirelessly charge it. The operation is performed (S115).

6 is a diagram showing a wireless charging method according to an embodiment of the present invention according to a first mode.

Referring to FIG. 6, the sensor unit 110 detects a change in capacitance when an object approaches the sensor unit 110 (S201 ).

Thereafter, the control unit 140 checks whether the change in the capacitance detected in step S201 exceeds the reference time (S203).

Thereafter, when the capacitance change detected in step S201 continues beyond the reference time as a result of checking in step S203, the controller 140 turns off the sensor unit 110 (S205). In addition, the control unit 140 turns on the charging unit 130 (S207).

Meanwhile, if the capacitance change detected in step S201 is less than the reference time as a result of checking in step S203, the controller 140 returns to step S201.

Thereafter, the control unit 140 controls the charging unit 130 to transmit a ping signal for wireless charging to the object to be mounted (S209).

Thereafter, the controller 140 checks whether a response signal according to the ping signal transmitted in step S209 is received from the object to be mounted (S211).

Thereafter, the control unit 140 wirelessly charges the object to be mounted by controlling the charging unit 130 when the response signal is received in step S211 (S213 ).

Meanwhile, if the response signal is not received as a result of checking in step S211, the control unit 140 returns to step S201. This is because it is determined that the object mounted on the wireless charging device 100 is not an object capable of wireless charging.

Thereafter, the control unit 140 checks whether the object to be mounted has left the wireless charging device 100 (S215). At this time, as a result of the determination in step S215, if the object to be mounted does not deviate from the wireless charging device 100, the control unit 140 controls the charging unit 130 to maintain wireless charging of the object to be mounted.

On the other hand, the control unit 140 returns to step S201 when the object to be mounted leaves the wireless charging device 100 as a result of checking in step S215.

7 is a diagram illustrating a wireless charging method according to an embodiment of the present invention according to a second mode.

Referring to FIG. 7, the sensor unit 110 detects a change in capacitance changed when an object approaches the sensor unit 110 (S301 ).

Thereafter, the controller 140 checks whether the change in the capacitance detected in step S301 exceeds the reference time (S303).

Thereafter, when the capacitance change detected in step S301 continues beyond the reference time as a result of checking in step S303, the control unit 140 turns off the sensor unit 110 (S305). In addition, the control unit 140 turns on the communication unit 120 and the charging unit 130 (S307).

Meanwhile, when the capacitance change detected in step S301 is less than the reference time as a result of checking in step S303, the controller 140 returns to step S301.

Thereafter, the control unit 140 controls the communication unit 120 to transmit a ping signal for NFC communication to the object to be mounted (S309).

Thereafter, the controller 140 checks whether a response signal according to the ping signal transmitted in step S309 is received from the object to be mounted (S311).

Thereafter, when the response signal according to the ping signal transmitted in step S309 is received as a result of checking in step S311, the control unit 140 controls the communication unit 120 to perform NFC communication with the stationary object (S313).

Thereafter, the control unit 140 controls the charging unit 130 to transmit a ping signal for wireless charging to the mounting object (S315). Meanwhile, the control unit 140 controls the charging unit 130 to transmit a ping signal for wireless charging to the stationary object even when a response signal according to the ping signal transmitted in the step S309 is not received as a result of checking in step S311. .

Thereafter, the controller 140 checks whether a response signal according to the ping signal transmitted in step S315 is received from the object to be mounted (S317).

Thereafter, when the response signal according to the ping signal transmitted in step S315 is received as a result of checking in step S317, the control unit 140 controls the charging unit 130 to wirelessly charge the mounted object (S319).

Meanwhile, if the response signal according to the ping signal transmitted in step S315 is not received as a result of checking in step S317, the controller 140 returns to step S301. This is because it is determined that the object mounted on the wireless charging device 100 is not an object capable of wireless charging.

Thereafter, the control unit 140 checks whether the object to be mounted has left the wireless charging device 100 (S321). At this time, as a result of checking in step S321, if the mounted object does not deviate from the wireless charging device 100, the control unit 140 controls the charging unit 130 to maintain wireless charging of the mounted object.

On the other hand, the control unit 140 returns to step S301 when the object to be mounted leaves the wireless charging device 100 as a result of checking in step S321.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention may be implemented in other specific forms without changing its technical spirit or essential features. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

100: wireless charging device
110: sensor unit
120: communication unit
130: charging unit
140: control unit

Claims (17)

A sensor unit for sensing a change in capacitance;
A charging unit for wirelessly charging the object to be mounted; And
It includes a control unit for controlling the charging unit so that the mounting object is charged,
The control unit turns on the charging unit and turns off the sensor unit when the sensor unit detects the change in capacitance beyond a reference time in the sensor unit. According to claim 2,
The sensor unit is a wireless charging device that is a capacitive sensor (Capacitive sensor). According to claim 1,
Wireless charging device further comprises a communication unit for performing NFC communication with the mounting object. According to claim 3,
The control unit controls the communication unit to perform communication with the mounting object according to a preset mode, or a wireless charging device to control the charging unit so that the mounting object is charged. According to claim 3,
The communication unit is a wireless charging device including an NFC antenna. The method of claim 5,
The NFC antenna is a wireless charging device disposed on the same substrate as the sensor unit. The method of claim 5,
The sensor unit is configured to include an antenna,
The sensor unit antenna and the NFC antenna are wireless charging devices used in common. According to claim 4,
When the preset mode is the first mode, the control unit controls the charging unit to turn on the charging unit so that the mounting object is charged,
The first mode is a wireless charging device that is a mode for performing only wireless charging. According to claim 4,
The control unit controls the communication unit to turn on the communication unit to perform communication with the mounting object when the preset mode is the second mode, and controls the charging unit to charge the mounting object by turning on the charging unit.
The second mode is a wireless charging device that is a mode for performing both wireless charging and NFC communication. A sensing step of sensing a change in capacitance through the sensor unit;
A turn-off step of turning off the sensor unit when sensing the change in capacitance beyond a reference time in the sensing step;
A turn-on step of turning on a charging section for wirelessly charging the mounting object when the change in the capacitance exceeds the reference time in the sensing step;
A ping signal transmission step of transmitting a ping signal from the charging unit to the mounting object when the charging unit is turned on in the turning-on step; And
And a control step of controlling the charging unit so that the mounting object is wirelessly charged when the ping signal is transmitted to the mounting object in the ping signal transmission step. The method of claim 10,
The turn-on step turns on the communication unit for performing NFC communication with the charging unit or the mounting object,
In the ping signal transmission step, the charging unit or the communication unit transmits the ping signal to the object to be mounted,
The control step is a wireless charging method to control the communication unit to perform communication with the mounting object according to a preset mode or to control the charging unit so that the mounting object is wirelessly charged. The method of claim 11,
In the control step, when the preset mode is the first mode, the charging unit is controlled to wirelessly charge the mounted object,
The first mode is a wireless charging method in which only wireless charging is performed. The method of claim 12,
The control step,
Checking whether the charging unit receives a response signal according to the ping signal transmitted to the object to be mounted;
Controlling the charging unit so that the mounting object is wirelessly charged when the response signal is received; And
Wireless charging method comprising the step of confirming that the mounting object is removed during wireless charging. The method of claim 13,
The control step,
A wireless charging method further comprising the step of turning on the sensor unit to detect the change in the electrostatic capacity again when the mounted object is detached during wireless charging. The method of claim 11,
The control step controls the communication unit to perform communication with the mounting object when the preset mode is the second mode, and controls the charging unit to charge the mounting object,
The second mode is a wireless charging method that is a mode for performing both wireless charging and NFC communication. The method of claim 15,
The control step,
Checking whether a response signal according to a ping signal transmitted from the communication unit and the charging unit to the stationary object is received;
Controlling the communication unit to perform communication with the mounting object when the response signal is received, and controlling the charging unit to wirelessly charge the mounting object; And
Wireless charging method comprising the step of confirming that the mounting object is removed during wireless charging. The method of claim 16,
The control step,
A wireless charging method further comprising the step of turning on the sensor unit to detect the change in the electrostatic capacity again when the mounted object is detached during wireless charging.

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