KR101476103B1 - Smart phone for wireless-charging wearable device and method for transmitting wireless power of the same - Google Patents

Abstract

A smartphone for wireless charging of a wearable device comprises: a low energy Bluetooth module which operates in a slave mode; a remaining battery checking module which checks the remaining charge of a battery; a wireless power reception module which receives wireless power; a charge circuit module which charges the battery using the wireless power; a wireless power transmission module which transmits power of the battery; a resonator which is configured so that the wireless power reception module receives the wireless power or the wireless power transmission module transmits the wireless power; a switching module which switches the resonator to be connected to one of the wireless power reception module and the wireless power transmission module; and a control module which keeps a wireless power reception mode by connecting the resonator to the wireless power reception module at normal times, switches to a wireless power transmission mode by switching the resonator to be connected to the wireless power transmission module if a voltage on the resonator is not sensed while sensing the voltage on the resonator at the normal times, sends a beacon signal to detect the wearable device by controlling the wireless power transmission module in the wireless power transmission mode, switches the low energy Bluetooth module to a mater mode if the wearable device is detected by the beacon signal, fixedly connects the resonator to the wireless power transmission module if the low energy Bluetooth module detects the wearable device, and switches to the wireless power reception mode again by switching the resonator to be connected to the wireless power reception module if the wearable device is not sensed by the beacon signal.

Description

TECHNICAL FIELD [0001] The present invention relates to a smart phone for wirelessly charging a wearable device, and a wireless power transmitting method therefor.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless charging system and a wireless power transmission method thereof, and more particularly, to a smart phone and a wireless power transmission method for wireless charging of a wearable device.

There are wired charging methods and wireless charging methods for charging devices such as mobile phones.

The wired charging method has a drawback that it has a limitation that it is a wired type and causes complexity of the surrounding environment, and also limits the number of battery charging devices per charger.

On the other hand, there are magnetic induction type and magnetic resonance type in the wireless charging type. The magnetic induction type improves the spatial restriction, improves the complicated surrounding environment, and is convenient for charging anytime and anywhere . In addition, there is an advantage that the structure is simple.

In addition, the self-resonance method is less restricted by the charging distance than the magnetic induction method and has a merit of being able to be charged at a relatively long distance, that is, the degree of freedom.

As such, wireless charging has advantages over conventional wired charging, such as convenience and space utilization.

Japanese Patent Application Laid-Open No. 10-2013-0047722 discloses a technique for charging a vehicle wirelessly, and Japanese Patent Laid-Open Publication No. 10-2013-0143148 discloses an adapter attached to a table to charge a wireless pad.

However, such wireless charging is performed through a separate wireless charger, and a separate wireless charger is connected to the commercial power supply to transmit the commercial power through the wireless power or to transmit the wireless power to the power supplied from the battery of the vehicle It is common. That is, power supplied from a separate power source is transmitted in a wireless manner.

Although the wireless charging method overcomes the space limitations, the wireless charger itself has a spatial limitation that it must be connected to a commercial power source or a vehicle power source.

Therefore, it can not be said that wireless charging of mobile devices is in fact completely overcoming the space limitations.

For example, there is a disadvantage in that wireless charging is difficult in a space limited in the supply of commercial power such as outdoor or in a vehicle outside the supply of vehicle power.

10-2013-0047722 10-2013-0143148

An object of the present invention is to provide a smart phone for wireless charging of a wearable device.

It is another object of the present invention to provide a wireless power transmission method of a smartphone for wireless charging of a wearable device.

According to an aspect of the present invention, there is provided a smart phone for wirelessly charging a wearable device, the mobile phone including: a bluetooth low energy (BLE) module operating normally in a slave mode; A battery remaining amount check module for periodically checking the remaining amount of the installed battery; A wireless power receiving module for receiving wireless power by a resonant wireless charging scheme; A charging circuit module for charging the battery using wireless power received through the wireless power receiving module; A wireless power transmission module for wirelessly transmitting power of the battery mounted by the resonance type wireless charging system; A resonator in which the wireless power receiving module receives wireless power by a resonant wireless charging scheme or the wireless power transmitting module is configured to transmit wireless power; A switching module for switching and connecting the resonator to either the wireless power receiving module or the wireless power transmitting module and switching the wireless power receiving module at all times; The resonator is switched to the wireless power receiving module by controlling the switching module at all times to maintain the wireless power receiving mode, and when the voltage is not sensed in the resonator by detecting the voltage applied to the resonator in the wireless power receiving mode The switching module switches the resonator to the wireless power transmission module to switch to the wireless power transmission mode, and controls the wireless power transmission module in the wireless power transmission mode to transmit the beacon in a predetermined time unit for a predetermined period of time, and transmits the beacon signal to the wearable device to detect the wearable device. If the wearable device is detected by the beacon signal, the wearable device is switched to the master mode to search for the wearable device , The low-power blue- When the wearable device is detected by the module, the resonator is fixedly connected to the wireless power transmission module, and when the wearable device is not detected by the beacon signal, the resonator is switched to the wireless power reception module And a control module for switching to a wireless power receiving mode.

At this time, if the remaining amount of the battery 10 periodically checked in the battery remaining amount check module 120 is equal to or greater than the transmittable threshold value, the control module controls the wireless power transmission module 150 may be configured to send a beacon signal for a predetermined period of time for searching the wearable device 200.

Wherein the low power Bluetooth module receives an information message from the wearable device and transmits a message requesting status information and a remaining battery level to the wearable device upon receiving the information message, Information and the remaining amount of the battery.

Meanwhile, when the wearable device is detected by the beacon signal, the control module switches the low-power Bluetooth module to the master mode in the wireless power transmission mode, and after the Bluetooth communication is established, The wireless power transmission module periodically receives the remaining amount of the battery and compares the remaining amount of the received battery with the remaining amount of the battery checked in the remaining battery charge checking module, And can be configured to wirelessly transmit to the wearable device.

According to another aspect of the present invention, there is provided a method of wirelessly transmitting power of a smartphone for wirelessly charging a wearable device, the wireless power receiving mode being set at a normal time so that the wireless power receiving module transmits a resonant wireless charging method Receiving the wireless power by the charging circuit module and charging the battery mounted in the smart phone; The control module senses a voltage applied to the resonator and determines whether wireless power is received through the wireless power receiving module; If the wireless power is not received, the control module controls the switching module to switch the resonator to a wireless power transmission module to switch to a wireless power transmission mode; The battery remaining amount check module periodically checking the remaining amount of the battery mounted on the smartphone; Determining whether the remaining amount of the checked battery is equal to or greater than a predetermined transmission allowable threshold; If it is determined that the remaining amount of the battery is equal to or greater than the transmittable threshold value, the wireless power transmitting module transmits a beacon signal in a predetermined time unit according to the control of the control module to detect a wearable device in the vicinity step; When the search result wearable device is found, the control module converts the Bluetooth low energy (BLE) module into a master mode to search for and connect to the wearable device, and the low power Bluetooth module transmits the wearable device Periodically receiving a remaining amount of battery and status information from the battery; Comparing the remaining amount of the battery checked in the battery remaining amount check module with the remaining amount of the battery received in the low power Bluetooth module by the control module; When the remaining amount of the battery checked in the battery remaining amount check module is greater than the remaining amount of the battery received in the low power Bluetooth module and the transmittable threshold value, the switching module controls the resonator in accordance with the control of the control module, Fixed connection with a power transmission module; And wirelessly transmitting power of a battery mounted on the smartphone to the wearable device by the wireless power transmission module by a resonant wireless charging method.

When the wearable device is found as a result of the search, the control module switches the Bluetooth low energy (BLE) module to a master mode to search for and connect to the wearable device, and the low- Wherein the step of periodically receiving status information and remaining amount of the battery from the connected wearable device comprises: when the low power Bluetooth module receives an information message from the wearable device, the low power Bluetooth module transmits the remaining amount of battery to the wearable device And to receive a remaining amount of battery from the wearable device.

And the control module controls the switching module to switch the resonator to the wireless power transmission module to switch to the wireless power transmission mode when the wireless power is not received as a result of the determination, And the wireless power transmission module transmits a beacon signal under the control of the control module when the remaining amount of the battery is equal to or greater than the transmittable threshold value.

According to the smart phone and the wireless power transmission method for wirelessly charging the wearable device described above, the charge charged in the battery of the smart phone is wirelessly transmitted from the smart phone to wirelessly charge the peripheral wearable device by wireless power, There is an effect that the wearable device can be charged wirelessly from anywhere without receiving it at all.

In particular, since wireless power can be received from a smartphone, which is commonly found anywhere, even without a separate wireless charger, charging of the wearable device becomes more convenient and spatial / temporal restriction can be completely overcome.

In addition, when the battery remaining amount of the smartphone is checked at any time and there is an amount of charge equal to or higher than a threshold that can be transmitted, or when the wearable device periodically detects that the battery remaining amount of the smartphone is greater than or equal to the transmittable threshold By transmitting only the wireless power to the transmission impossibility threshold, there is an effect that the use of the smart phone is not hindered and the charging of the power of the wearable device can be prevented.

1 is a block diagram of a smart phone for wireless charging of a wearable device according to an embodiment of the present invention.
2 is a flowchart of a wireless power transmission method of a smartphone for wireless charging of a wearable device according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a smart phone for wireless charging of a wearable device according to an embodiment of the present invention.

Referring to FIG. 1, a smart phone 100 for wirelessly charging a wearable device according to an exemplary embodiment of the present invention includes a Bluetooth low energy (BLE) module 110, A battery level checking module 120, a wireless power receiving module 130, a charging circuit module 140, a wireless power transmitting module 150, a resonator 160, a switching module 170, a control module 180 ). ≪ / RTI >

The smartphone 100 wirelessly transmits the electric charge charged in the battery 10 of the smartphone 100 to the wearable device 200 or the mobile device device via the wireless power transmission module 150 in the smartphone 100 And is configured to wirelessly charge.

The smartphone 100 periodically receives the remaining amount of the battery 21 of the wearable device 200 and the status information of the wearable device 200 through the low power Bluetooth communication and also checks the remaining amount of the battery 10 of the smartphone 100 So as to compare and examine each other. If the remaining amount of the battery 10 of the smartphone 100 is greater than the transmittable threshold in consideration of the remaining amount and size of the battery 21 of the wearable device 200, the wireless power is allowed to be transmitted only up to the predetermined transmission disable threshold So that the discharge of the smartphone 100 is prevented so that there is no disruption in the use of the smartphone 100.

Since the wearable device 200 and the smartphone 100 are configured to receive the wireless power from the smartphone 100 that is always available anywhere without being able to supply the commercial power or the vehicle power even without a dedicated wireless charger, It is advantageous in that it can be configured to be conveniently charged at the same time as it is used without receiving it.

Hereinafter, the detailed configuration will be described.

The control module 180 may be configured to transmit a beacon signal at a predetermined time interval through the wireless power transmission module 150 to detect a wearable device 200 or an object in the vicinity of the beacon signal. The low power Bluetooth module 110 may be configured to search for and connect the wearable device 200 in the vicinity according to the specification.

Here, the use of the beacon signal may be such that the wireless power transmitting module 150 transmits power of a predetermined size for a predetermined time for the purpose of detecting the wearable device 200 or the mobile device in which the wireless power transmitting module 150 is nearby It is repeatedly transmitted.

The low power Bluetooth module 110 may be operated in a master mode or a slave mode and may be configured to operate exclusively in a slave mode at all times. The low-power Bluetooth module 110 is a configuration for periodically receiving remaining amount and status information of the battery 21 of the wearable device 200 according to specifications.

Here, the wearable device 200 is not limited in its use or type, such as a device attached to the wrist or a device in the form of a spectacle in connection with health, exercise, or the like.

The battery remaining amount check module 120 may be configured to periodically check the remaining amount of the battery 10 mounted on the smartphone 100.

The wireless power receiving module 130 may be configured to receive wireless power by a resonant wireless charging scheme and to charge the battery 10 through the charging circuit module 140. [

The wireless power receiving module 130 can be configured to receive wireless power at any time only in a state of operating in a slave mode in a Bluetooth low energy (BLE) mode.

The wireless power receiving module 130 may be configured to receive wireless power from the smartphone 100 or a separate dedicated wireless charger.

The wireless power transmission module 150 may be configured to wirelessly transmit power of the battery 10 mounted on the smartphone 100 by a resonant wireless charging scheme. At this time, the wireless power transmission module 150 may be configured to operate in a master mode in a low-power Bluetooth system.

At this time, the wireless power transmission module 150 may be configured to transmit wireless power to the wearable device 200, but it goes without saying that it may be configured to transmit wireless power to another smartphone or a mobile device.

The wireless power receiving module 130 and the wireless power transmitting module 150 may be configured to operate only one of them separately or without receiving each other. That is, only the wireless power receiving module 130 may be operated or only the wireless power transmitting module 150 may be operated.

The resonator 160 may be configured such that the wireless power receiving module 130 receives wireless power or the wireless power transmitting module 150 transmits wireless power by a resonant wireless charging scheme. The resonator 160 may be composed of a resonant circuit and a resonant antenna.

The switching module 170 may be configured to switch and connect the resonator 160 with either the wireless power receiving module 130 or the wireless power transmitting module 150. [ Accordingly, the wireless power receiving module 130 or the wireless power transmitting module 150 can be configured to operate only one of them at the same time.

The switching module 170 may be configured to switch to the wireless power receiving mode by switching the resonator 160 to the wireless power receiving module 130 at all times.

The control module 180 may be configured to sense whether wireless power is received via the wireless power receiving module 130. [ Wireless power may be received from a separate dedicated wireless charger, and wireless power may be received from another smartphone.

When the wireless power is not received, the control module 180 may be configured to control the wireless power transmission module 150 to transmit a beacon signal for a predetermined time.

The control module 180 may be configured to send out a beacon signal to sense the nearby wearable device 200 or other smartphone or object.

The control module 180 may be configured to determine whether the wearable device 200 is searched in the low power Bluetooth module 110. [ And when the wearable device 200 is found as a result of the determination, the switching module 170 may be controlled to fix the resonator 160 to the wireless power transmission module 150. [ Thus, the power of the battery 10 is wirelessly transmitted and the wearable device 200 can be charged.

At this time, the control module 180 may transmit the wireless power unconditionally, but may be configured to determine whether to transmit the wireless power considering the remaining amount of the battery 10 of the smartphone 100.

That is, the control module 180 periodically receives the remaining amount and status information of the battery 21 of the wearable device 200 through the low-power Bluetooth module 110, and transmits the remaining amount of the battery 21 and the battery remaining amount check module And compare and check the remaining amount of the battery 10 checked in the battery 120. The control module 180 controls the wireless power transmission module 150 to transmit the battery power to the battery 210 when the remaining amount of the checked battery 10 is greater than or equal to a predetermined transmittable threshold considering the remaining amount of the battery 21 of the wearable device 200. [ 10 to the wearable device 200 so that the remaining amount of the battery 10 can be wirelessly transmitted to a predetermined transmission-unrequested threshold value.

To this end, the control module 180 may be configured to control the switching module 170 to switch the resonator 160 to the wireless power transmission module 150 for connection. Accordingly, the wireless power transmission module 150 may be configured to transmit wireless power.

At this time, the low-power Bluetooth module 110 may be configured to receive an information message from the wearable device 200 after connecting to the low-power Bluetooth. When the low-power Bluetooth module 110 receives the information message, the low-power Bluetooth module 110 transmits a message requesting the remaining amount of the battery 21 to the wearable device 200 and transmits the message to the wearable device 200 from the wearable device 200 As shown in FIG.

On the other hand, if the remaining amount of the battery 10 checked in the remaining battery level checking module 120 is equal to or greater than the transmittable threshold, the control module 180 controls the wireless power transmitting module 150 to transmit a beacon signal . That is, the wireless device may be configured to transmit wireless power only when there is a residual amount of the battery 10 having an absolute threshold value in consideration of the battery remaining amount and the state information of the wearable device 200.

The wearable device 200 is configured to wirelessly receive power from the wireless charge receiving module 21 and charge the battery 21.

2 is a flowchart of a wireless power transmission method of a smartphone for wireless charging of a wearable device according to an embodiment of the present invention.

2, the wireless power receiving module 130 is initially set to the wireless power receiving mode at all times, so that the wireless power receiving module 130 receives the wireless power by the resonant wireless charging method through the resonator 150, 140 charges the battery 10 mounted on the smart phone 100 (S101).

Next, the control module 180 senses a voltage applied to the resonator 160 and determines whether wireless power is received through the wireless power receiving module 130 (S102).

If the wireless power is not received as a result of the determination, the control module 180 controls the switching module 170 to switch and connect the resonator 160 to the wireless power transmission module 150 for a predetermined period of time, (S103).

Next, the battery remaining amount check module 120 periodically checks the remaining amount of the battery 10 mounted on the smartphone 100 (S104).

Here, the control module 180 determines whether the remaining amount of the checked battery 10 is equal to or greater than the transmittable threshold (S105).

The wireless power transmission module 150 transmits a beacon signal in units of a predetermined time according to the control of the control module 180 and outputs a beacon signal to the wearable device device 200 (S106).

More specifically, when the remaining amount of the battery 10 checked in the remaining battery charge checking module 120 is equal to or greater than the transmittable threshold, the wireless power transmitting module 150 transmits a beacon signal under the control of the control module 180 .

At this time, the detection result control module 180 determines whether the wearable device 200 is searched (S107), and when the wearable device 200 is searched, the control module 180 controls the bluetooth low energy (BLE) module 110 to a master mode, and the low-power Bluetooth module 110 searches for a wearable device. After the connection of the bluetooth low energy (BLE) module 110 with the searched wearable device 200, the remaining amount and status information of the battery 21 of the wearable device 200 are periodically received (S108). More specifically, when the low-power Bluetooth module 110 receives an information message from the wearable device 200, the low-power Bluetooth module 110 requests the wearable device 200 to request the remaining amount of the battery 21 And to receive the remaining amount of the battery 21 from the wearable device 200. [0033]

Here, the control module 180 determines the remaining capacity of the battery based on the remaining amount of the battery checked in the battery remaining amount check module 120 and the remaining amount of the battery 21 received from the low-power Bluetooth module 110, (S109).

If the remaining amount of the battery 10 checked in the battery remaining amount check module 120 is less than the remaining amount of the battery 10 checked in consideration of the remaining amount of the battery 10 received in the low power Bluetooth module 110 communication The switching module 170 fixedly connects the resonator 160 to the wireless power transmission module 150 under the control of the control module 180 at step S101.

Next, the wireless power transmitting module 150 wirelessly transmits the power of the battery 10 mounted on the smartphone 100 to the wireless charging receiving module 21 of the wearable device 200 by the resonant wireless charging method And charges the battery 21. The remaining battery charge checking module 120 periodically checks the remaining amount of the battery 10 mounted on the smartphone 100 (S111).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. There will be.

10: Battery 20: Battery
100: smartphone 110: low power Bluetooth module
120: Battery remaining amount check module 130: Wireless power receiving module
140: charging circuit module 150: wireless power transmission module
160: Resonator 170: Switching module
180: Control module 200: Wearable device

Claims (7)

A bluetooth low energy (BLE) module 110 that operates in a slave mode at all times;
A battery remaining amount check module 120 for periodically checking the remaining amount of the installed battery 10;
A wireless power receiving module (130) for receiving wireless power by a resonant wireless charging scheme;
A charging circuit module (140) for charging the battery (10) using radio power received through the wireless power receiving module (130);
A wireless power transmission module (150) for wirelessly transmitting the power of the mounted battery (10) by a resonance type wireless charging scheme;
A resonator 160 configured to receive wireless power by the wireless power receiving module 130 by a resonant wireless charging scheme or to transmit the wireless power by the wireless power transmitting module 150;
A switching module for switching and connecting the resonator 160 to either the wireless power receiving module 130 or the wireless power transmitting module 150 and switching the wireless power receiving module 130 at all times 170);
The switching module 170 is controlled to switch the resonator 160 to the wireless power receiving module 130 so that the resonator 160 is maintained in the wireless power receiving mode and the voltage applied to the resonator 160 in the wireless power receiving mode And when the voltage is not sensed in the resonator 160, the switching module 170 is controlled to switch the resonator 160 to the wireless power transmission module 150 to switch to the wireless power transmission mode Controls the wireless power transmission module 150 in the wireless power transmission mode to transmit a beacon signal in a predetermined time unit for a predetermined period of time to detect the wearable device 200 in the vicinity, When the wearable device 200 is detected, the low power Bluetooth module 110 is switched to the master mode, When the wearable device 200 is searched by the low power Bluetooth module 110, the resonator 160 is fixedly connected to the wireless power transmission module 150, And a control module (180) for switching the resonator (160) to the wireless power receiving module (130) and switching back to the wireless power receiving mode when the wearable device (200) is not detected by the signal,
The control module (180)
When the remaining amount of the battery 10 periodically checked in the battery remaining amount check module 120 is equal to or greater than the transmittable threshold value, the wireless power transmission module 150 controls the wearable device 200 ) For a predetermined period of time, wherein the beacon signal is transmitted for a predetermined period of time,
The low power Bluetooth module (110)
Receives an information message from the wearable device 200 and transmits a message requesting status information and the remaining amount of the battery 21 to the wearable device 200 when the information message is received, 200, and a remaining amount of the battery 21,
The control module (180)
When the wearable device 200 is detected by the beacon signal, the low power Bluetooth module 110 is switched to the master mode in the wireless power transmission mode, and after the Bluetooth communication is established, the wearable device 200 Periodically comparing the remaining amount of the battery 21 received and the remaining amount of the battery 10 checked in the remaining battery amount checking module 120 to determine whether the checked battery 10 The wireless power transmission module 150 is configured to wirelessly transmit the power of the battery 10 to the wearable device 200,
The wireless power receiving module 130 is configured to be able to receive wireless power at any time only in a state of being operated in a slave mode in a Bluetooth low energy (BLE)
Wherein the resonator (160) comprises a resonant circuit and a resonant antenna.
delete delete delete The wireless power receiving module 130 is set to the wireless power receiving mode at all times so that the wireless power receiving module 130 receives the wireless power by the resonant wireless charging method through the resonator 160 and the charging circuit module 140 receives the wireless power through the smart phone smart charging a battery (10) mounted on a mobile phone (100);
The control module 180 senses a voltage applied to the resonator 160 and determines whether wireless power is received through the wireless power receiving module 130;
If the wireless power is not received as a result of the determination, the control module 180 controls the switching module 170 to switch the resonator 160 to the wireless power transmission module 150 to switch to the wireless power transmission mode ;
The battery remaining amount check module 120 periodically checks the remaining amount of the battery 10 mounted on the smartphone 100;
Determining whether the remaining amount of the checked battery 10 is equal to or greater than a predetermined transmittable threshold;
When the remaining amount of the battery 10 is equal to or greater than the transmittable threshold value, the wireless power transmission module 150 transmits a beacon signal in a predetermined time unit under the control of the control module 180, Searching for a wearable device (200);
If the search result wearable device 200 is detected, the control module 180 switches the Bluetooth low energy (BLE) module 110 to the master mode to search for the wearable device 200 And the low-power Bluetooth module (110) periodically receives remaining amount and status information of the battery (21) from the connected wearable device (200);
The control module 180 compares the remaining amount of the battery checked in the battery remaining amount check module 120 with the remaining amount of the battery 21 received in the low power Bluetooth module 110;
If the remaining amount of the battery 10 checked in the battery remaining amount check module 120 is greater than the remaining amount of the battery 21 received in the low power Bluetooth module 110 and the transmittable threshold value, 180), the switching module (170) fixedly connecting the resonator (160) to the wireless power transmission module (150);
Wirelessly transmitting power of the battery (10) mounted on the smartphone (100) to the wearable device (200) by the wireless power transmission module (150) by a resonant wireless charging method,
If the search result indicates that the wearable device 200 is found, the control module 180 switches the Bluetooth low energy (BLE) module 110 to the master mode to search for the wearable device 200 And the low power Bluetooth module 110 periodically receives the status information and remaining amount of the battery 21 from the connected wearable device 200,
When the low power Bluetooth module 110 receives an information message from the wearable device 200, the low power Bluetooth module 110 transmits a message requesting the remaining amount of the battery 21 to the wearable device 200 To receive the remaining amount of the battery (21) from the wearable device (200)
If the wireless power is not received as a result of the determination, the control module 180 controls the switching module 170 to switch the resonator 160 to the wireless power transmission module 150 to switch to the wireless power transmission mode Lt; / RTI >
The wireless power transmission module 110 transmits a beacon signal under the control of the control module 180 when the remaining amount of the battery 10 checked in the battery remaining amount check module 120 is equal to or greater than the transmittable threshold value And,
The wireless power receiving module 130 is configured to be able to receive wireless power at any time only in a state of being operated in a slave mode in a Bluetooth low energy (BLE)
Wherein the resonator (160) comprises a resonant circuit and a resonant antenna. A wireless power transmission method of a smartphone for wireless charging of a wearable device.
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