KR101669877B1 - Wireless charging system for wearable device - Google Patents

Wireless charging system for wearable device Download PDF

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Publication number
KR101669877B1
KR101669877B1 KR1020150067677A KR20150067677A KR101669877B1 KR 101669877 B1 KR101669877 B1 KR 101669877B1 KR 1020150067677 A KR1020150067677 A KR 1020150067677A KR 20150067677 A KR20150067677 A KR 20150067677A KR 101669877 B1 KR101669877 B1 KR 101669877B1
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KR
South Korea
Prior art keywords
charging
state
wireless
wireless charging
information
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KR1020150067677A
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Korean (ko)
Inventor
서경식
강수진
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(주)모메드솔루션
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    • H02J7/025—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/163—Wearable computers, e.g. on a belt

Abstract

The present invention relates to a wireless charging system for a wearable device, capable of maximizing wireless charging efficiency by minimizing self-discharge after a wearable device is fully discharged. The present invention includes: a plurality of wireless charging parts generating and transmitting a wireless power signal to each determined charging area while receiving charging state information from each charging target; and a control part independently controlling the operation of the wireless charging parts. Each of the wireless charging parts is operated in an on-state, an off-state, or a sleep state in accordance with the operational control of the control part. The control part controls the wireless charging parts to be operated in the on-state, the off-state or the sleep state based on the charging state information delivered from each of the wireless charging parts.

Description

Technical Field [0001] The present invention relates to a wireless charging system for a wearable device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless charging technique, and more particularly, to a wireless charging system of a wearable device capable of maximizing wireless charging efficiency by minimizing self-discharge after a full load of a wearable device.

There are a wired charging method and a wireless charging method for charging various user terminals including a laptop computer or a smart device linked to a wearable device.

The wired charging method requires not only the spatial complexity but also the limit of connecting the terminal and the charging device one by one because the cable must be connected directly to the charging target terminal.

The wireless charging method is a magnetic induction method and a self resonance method. Since the wireless charging method does not need to directly connect the terminal and the charger, space restriction can be improved.

Recently, a technique of charging a wearable device through a wireless charging method has been introduced. Generally, the wireless charging method recognizes the battery as full charging when the battery reaches a certain ratio of the total charging capacity, and completes the wireless charging. On the other hand, as the time elapses, the charged battery is discharged according to the natural discharge phenomenon of the charge. When a long time passes after the full charge, the charged battery is used instead of the fully charged battery.

In order to compensate for the disadvantages of such a wireless charging technique, Japanese Patent Application Laid-Open No. 10-1476103 discloses a technique of wirelessly charging charges in a battery of a smart phone by wireless power transmission from a smart phone to wirelessly charging the wearable device in the vicinity thereof. If the battery remaining amount of the smartphone is checked at any time and there is a charge amount exceeding the threshold that can be transmitted or the wearable device is periodically detected and the battery remaining amount of the smart phone is detected as being equal to or greater than the transmittable threshold value of the wearable device, Of the wearable device is limited to a transmission impossibility threshold so that the use of the smart phone is not hindered and the power supply of the wearable device is not disturbed.

A method and an apparatus for supporting a charging state of a portable terminal in a best state even in a general charging system have been disclosed [Japanese Patent Application Laid-Open No. 10-2010-004656]. Particularly, a technique of checking the charge amount so as to maintain the state of charge of the battery in the best condition and further executing the recharging process is introduced.

In recent years, technologies for simultaneously charging a plurality of terminals from one charging device through a wireless charging method have been introduced. In such a simultaneous charging technique, identification of a plurality of terminals, charging status check for each terminal, There is still a problem to be solved.

It is an object of the present invention to provide a charging device capable of simultaneously charging a plurality of terminals wirelessly through a single charger while checking the charging status of each terminal by identifying each terminal, The present invention provides a wireless charging system of a wearable device capable of maintaining a wearable device.

According to another aspect of the present invention, there is provided a wireless charging system for a wearable device, the wireless charging system including: a plurality of wireless charging units for generating wireless power signals and transmitting the wireless power signals to a predetermined charging area and receiving charging status information from each charging object; And a controller for independently controlling operations of the plurality of wireless chargers, wherein the plurality of wireless chargers operate in one of an on state, an off state, and a sleep state according to an operation control of the controller, And controlling the plurality of wireless charging units to operate in any one of the on state, the off state, and the sleep state based on the charging state information transmitted from the charging unit.

Preferably, the plurality of wireless charging units each have a unique charger identification number, and may include the charger identification number and transmit the charging status information to the control unit.

Preferably, the plurality of wireless charging units may receive the charging status information including the charging target identification number for identifying each charging target from the corresponding charging target.

More preferably, the multiple wireless charging unit can further receive specification information including a charging capacity and a maximum use time of each charging object from the corresponding charging object.

More preferably, the control unit stores the charging state information and the specification information in a database, calculates performance information of each charging object based on the charging state information and the specification information, Wherein the performance information includes a charging time to a full charge of each charge object, a self-discharge ratio with respect to a reference time after a full charge of each charge object, and a self-discharge time . ≪ / RTI >

Preferably, the control unit controls the wireless charging unit to operate from the on state to the sleep state when the charging state information indicates the full state, It may be a state of receiving only information.

More preferably, the control unit may control the sleeping wireless unit to operate in the off state when the charging object is released from the charging area of the wireless charging unit operating in the sleeping state.

More preferably, the controller controls the wireless charging unit in the sleep state to operate in the on state based on the charging state information received from the wireless charging unit operating in the sleep state, The control unit may control the wireless active unit in the sleep state to operate in the on state when the charge state information indicating that the charge state is less than the charge amount is received.

The present invention has the following effects.

It is possible to identify each terminal by exchanging data between a plurality of terminals to be charged and the charging devices and to check the charging status of each terminal.

In addition, since each of the charging states can be checked for a plurality of terminals, it is possible to control to maintain a full state for each terminal.

In addition, the self-discharge time to the reference time after the full charge and the self-discharge time to the reference charge amount after the full charge are calculated to check the performance which varies depending on the usage time, i.e., the charging ability and battery life per terminal.

1 is a diagram showing a configuration of a wireless charging system according to an embodiment of the present invention,
FIG. 2 is a diagram illustrating a wireless charging control method according to an embodiment of the present invention,
3 is a diagram illustrating a wireless charging control method according to another embodiment of the present invention.

Other objects, features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and an operation of an embodiment of the present invention will be described with reference to the accompanying drawings, and the configuration and operation of the present invention shown in and described by the drawings will be described as at least one embodiment, The technical idea of the present invention and its essential structure and action are not limited.

Hereinafter, preferred embodiments of a wireless charging system of a wearable device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing a configuration of a wireless charging system according to an embodiment of the present invention.

Referring to FIG. 1, the wireless charging system of the present invention includes a plurality of wireless charging units 10 to 30, a controller 40, and a database 50. Here, the database 50 may be understood as a memory built in the control unit 40. [

The plurality of wireless charging units 10 to 30 generate wireless power signals under the control of the controller 40 and transmit the generated wireless power signals to the predetermined charging areas, respectively.

The multiple wireless charging units 10 to 30 receive the charging status information for each charging object including the wearable device. Here, it should be understood that the object to be charged can be excluded from the components of the wireless charging system of the present invention, but the charging object and the specification information are transmitted while the object to be charged communicates with the plurality of wireless charging units 10 to 30.

The controller 40 controls the operation of the plurality of wireless chargers 10 to 30 independently. The control unit 40 controls the operation of the plurality of wireless charging units 10 to 30 to operate in an on state, an off state, or a sleep state. Accordingly, the plurality of wireless charging units 10 to 30 can operate in the ON state, the OFF state, and the sleep state according to the operation control of the control unit 40. [

In particular, the control unit 40 can control the plurality of wireless charging units 10 to 30 to operate in any one of the on state, the off state, and the sleep state based on the charge state information transmitted from the plurality of wireless charging units 10 to 30 have. Here, the charge status information may be information indicating how much the current charge amount is in relation to the charge capacity according to the specification of each charge object.

The controller 40 is configured to independently control the operation of the plurality of wireless chargers 10 to 30, and each of the plurality of wireless chargers 10 to 30 has a unique charger identification number.

The multiple wireless charging units 10 to 30 transmit the unique charger identification number assigned to itself to the control unit 40 in the charging status information received from the charging object.

The controller 40 recognizes the charger identification number included in the charging status information when receiving the charging status information, and can confirm which wireless charging unit receives the currently received charging status information.

As a result, the control unit 40 can identify the plurality of wireless charging units 10 to 30 through the charging status information, so that the operation of the plurality of wireless charging units 10 to 30 can be independently controlled.

For example, as in the example shown in FIG. 1, the control unit 40 controls the second wireless charging unit 20, which is not located in the charging area, among the plurality of wireless charging units 10 to 30 to be in an off state . Also, the first wireless charging unit 10 and the third wireless charging unit 30, in which the object to be charged is located, are controlled to operate in an on state or a sleep state depending on the charging state of the object to be charged.

As another example, the charge state information received by each of the plurality of wireless charging units 10 to 30 from each charging object may include a charging object identification number for identifying each charging object.

The multiple wireless charging units 10 to 30 further include their respective charger identification numbers in the charging status information including the charging target identification numbers and transmit them to the control unit 40. [

Further, the multiple wireless charging units 10 to 30 can further receive the specification information including the charging capacity and the maximum use time of each charging object from the corresponding charging object.

The control unit 40 extracts each charging object identification number from the received charging status information, stores the corresponding status information and specification information in the database 50 by matching each charging object identification number.

In particular, the control unit 40 calculates the charging ability and the life span corresponding to the performance information for each charging object based on the charging state information and the specification information for each charging object stored in the database 50. As another example, the system of the present invention may further include an output means (video or audio output) for outputting the information based on the result of calculating the charging ability and the life of each object to be charged.

 In order to calculate the charging ability and the life span of each charging object by using the charging state information and the specification information for each charging object as described above, the controller 40 controls the charging / Or the self-discharge time to reach the reference charge amount after the full charge. The self-discharge time to the self-discharge ratio or the reference charge amount after full charge with respect to the reference time after the full charge of the object to be charged varies depending on the use time for each object to be charged, and the maximum performance according to the specification information of each object to be charged decreases with time Characteristics.

The self discharge ratio with respect to the reference time after the full charge of the object to be charged is a percentage of the charge amount in which the object to be charged falls during the predetermined reference time after the object is fully charged and the wireless charger is switched to the sleep state. The self discharge time to reach the reference charge amount after full charge is the time taken until the charge object is fully charged and the charge object is switched to the sleep state and then the charge object is lowered to a predetermined reference charge amount or less by self discharge.

The control unit 40 stores the calculation result (performance information) such as the charging ability and the life span per charging object in the database 50 in correspondence with the identification numbers of the respective charging objects and stores them in the database 50 It can be used to control the charging operation on the object.

Accordingly, the control unit 40 can distinguish the charging object located for charging in the charging area of the plurality of wireless charging units 10 to 30, so that the number of wireless charging units 10 to 30 can be determined based on the performance information, To 30 may be controlled based on time without charge status information. For example, if the time for which the charging object A falls below the reference charging amount by self-discharge is T, the control unit 40 takes charge of charging the charging object A at a point of time T after the charging object A is fully charged The wireless charging unit may be automatically switched to the ON state. This is compared with the case where the plurality of wireless charging units 10 to 30 are kept in the sleep state in FIG. 2, which is described in detail in FIG.

On the other hand, the ON state described above is a state in which the charging state information is periodically received from the charging object while transmitting the wireless power signal to the charging object. Off state is a state in which the charging object is separated from the charging region in which the charging object is determined, so that generation or transmission of the wireless power signal and reception of the charging state information are not performed. The sleep state is a state in which the object to be charged is in a fully charged state but is located in a predetermined charging region and does not transmit a wireless power signal to the object to be charged but periodically receives charge state information from the object to be charged.

Details of how the control unit 40 controls the operation of the multiple wireless charging units 10 to 30 will be described with reference to FIGS. 2 and 3 illustrate a case where the controller 40 of FIG. 1 controls the operation of the first wireless charger 10 among the plurality of wireless chargers 10 to 30, and the reference numerals are omitted in the following description.

2 is a diagram illustrating a wireless charging control method according to an embodiment of the present invention.

Referring to FIG. 2, the control unit operates the first wireless charging unit in the ON state as the charging object is located in the charging area of the first wireless charging unit (S10).

The control unit periodically receives the charging status information of the charging object through the first wireless charging unit, and may also receive the specification information of the charging object (S20).

The control unit confirms whether the charging object is fully charged based on the charging state information periodically received from the first wireless charging unit in the turned-on state (S30).

The control unit controls the first wireless charging unit to operate from the on state to the sleep state when the charging state information of the charging object indicates the full state (S40). At this time, the control unit confirms the charge amount of the object to be charged while maintaining the reception of the charge state information from the first wireless charging unit in the sleep state.

In step S50, the control unit determines whether the current charging amount of the charging object falls below the reference charging amount based on the charging state information periodically received from the first wireless charging unit in the sleep state.

When the current charge amount of the object to be charged falls below the reference charge amount, the control unit turns on the first wireless charge unit (S10). That is, when the charging status information indicating that the charging object is below the reference charging level is received from the first wireless charging unit in the sleeping state, the control unit controls the first wireless charging unit to operate in the ON state.

It is preferable that the operation control of the controller is repeated until the charging object is released from the charging area of the first wireless charger.

On the other hand, the control unit can control the first wireless charging unit in the on state or the sleep state to operate in the off state when the charging object is deviated from the charging area after the full charge.

FIG. 3 is a diagram illustrating a wireless charging control method according to another embodiment of the present invention, in which the controller stores performance information of a charging object in a database.

Referring to FIG. 3, the control unit operates the first wireless charging unit in an ON state as the charging object is located in the charging region of the first wireless charging unit (S100).

The control unit periodically receives the charging status information of the charging object through the first wireless charging unit, and may also receive the specification information of the charging object (S200).

The control unit confirms whether the charging object is fully charged based on the charging state information periodically received from the first wireless charging unit in the on state (S300).

The control unit controls the first wireless charging unit to operate from the on state to the off state and starts the timer in step S400 when the charging state information of the charging object indicates the full state.

The control unit confirms whether the time by the timer exceeds T, which is the time (hereinafter referred to as performance time), which falls below the reference charging amount, based on the performance information of the charging object stored in advance in the database (S500).

When the time of the timer exceeds the performance time T of the object to be charged, the control unit causes the first wireless charging unit to operate in the ON state (S100). It is preferable that the operation control of the controller is repeated until the charging object is released from the charging area of the first wireless charger.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

It is therefore to be understood that the embodiments of the invention described herein are to be considered in all respects as illustrative and not restrictive, and the scope of the invention is indicated by the appended claims rather than by the foregoing description, Should be interpreted as being included in.

10 to 30: multiple wireless charging units
40:
50: Database

Claims (8)

A wireless power signal is generated and transmitted to each of the predetermined charging areas, the charging state information is received from each charging object, and the specification information including the charging capacity and the maximum use time of each charging object is further received from the corresponding charging object A plurality of wireless charging units for receiving; And
And a controller for independently controlling operations of the plurality of wireless charging units,
Wherein each of the plurality of wireless charging units operates in one of an on state, an off state, and a sleep state according to an operation control of the controller,
Wherein the controller controls the plurality of wireless charging units to operate in any one of the on state, the off state, and the sleep state based on the charging state information transmitted from the plurality of wireless charging units,
The control unit stores the charging state information and the specification information in a database, calculates performance information of each charging object based on the charging state information and the specification information, and transmits the calculated performance information of each charging object to the database Lt; / RTI >
Wherein the performance information includes a charging time to a full charge of each charging object, a self discharge ratio with respect to a reference time after a full charge of each charging object, and a self-discharge time to reach a reference charging amount after full charging of each charging object Device's wireless charging system. The method according to claim 1,
Wherein the plurality of wireless charging units comprise:
Each having a unique charger identification number, and including the charger identification number in the charging status information, and transmitting the charging status information to the control unit. The method according to claim 1,
Wherein the plurality of wireless charging units comprise:
And the charging state information including a charging object identification number for identifying each charging object is received from the corresponding charging object. delete delete The method according to claim 1,
Wherein,
And controls the wireless charger to operate in the sleep state from the on state when the charging state information indicates the full state,
Wherein the sleep state is a state in which each wireless charging unit receives only the charging state information from the charging object. The method according to claim 6,
Wherein,
And controls the sleeping wireless active unit to operate in the off state when the charging target is released from the charging area of the wireless charging unit operating in the sleeping state. The method according to claim 6,
Wherein,
And controlling the sleeping wireless unit to operate in the on-state based on the charging status information received from the wireless charging unit operating in the sleeping state,
Wherein the control unit controls the wireless charging unit in the sleep state to operate in the on state when the charging state information indicating that the charging object is less than a predetermined reference charging amount after the charging is received is received system.
KR1020150067677A 2015-05-14 2015-05-14 Wireless charging system for wearable device KR101669877B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022055114A1 (en) * 2020-09-14 2022-03-17 삼성전자주식회사 Wireless power transmitting apparatus, control method of wireless power transmitting apparatus, and wireless power system
WO2022131874A1 (en) * 2020-12-17 2022-06-23 삼성전자 주식회사 Electronic device including wireless charging circuit
KR20220119488A (en) * 2020-01-02 2022-08-29 소노바 컨슈머 히어링 게엠베하 Rechargeable chargers for rechargeable devices and charging methods for rechargeable devices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090056548A (en) * 2007-11-30 2009-06-03 정춘길 Non-contact power transfer device for multiple wireless charging
KR20100046562A (en) * 2008-10-27 2010-05-07 삼성전자주식회사 Method and apparatus for charging control of potable device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090056548A (en) * 2007-11-30 2009-06-03 정춘길 Non-contact power transfer device for multiple wireless charging
KR20100046562A (en) * 2008-10-27 2010-05-07 삼성전자주식회사 Method and apparatus for charging control of potable device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220119488A (en) * 2020-01-02 2022-08-29 소노바 컨슈머 히어링 게엠베하 Rechargeable chargers for rechargeable devices and charging methods for rechargeable devices
KR102539502B1 (en) * 2020-01-02 2023-06-02 소노바 컨슈머 히어링 게엠베하 Rechargeable chargers for rechargeable devices and charging methods for rechargeable devices
WO2022055114A1 (en) * 2020-09-14 2022-03-17 삼성전자주식회사 Wireless power transmitting apparatus, control method of wireless power transmitting apparatus, and wireless power system
WO2022131874A1 (en) * 2020-12-17 2022-06-23 삼성전자 주식회사 Electronic device including wireless charging circuit

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