KR20150140206A - Charging device - Google Patents

Abstract

A charging device comprises: a control unit for controlling charging start by determining an advertisement exposed during a preset time; a display for outputting the advertisement; and a charging unit for providing electric energy to a user terminal based on the charging start control.

Description

Charging device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile electronic device terminal, and more particularly, to a charging device for charging a smartphone, and more particularly,

With the recent development of various service industries, a variety of food service companies with convenience and diversity are operating. Examples of such restaurants include fast-food restaurants serving branded coffee shops, hamburger chicken, beverages, ice cream, and family restaurants serving a variety of menus targeted at family customers.

In an environment where the use of user terminals, especially smartphones, is increasing, users are often exposed to the need for charging. If the user wants to charge the smartphone while the user enters the service shop, especially the restaurant, he or she can usually charge his smartphone to the counter or charge the prepared charging jack to the appropriate outlet in the restaurant Connect and charge. However, when charging the smartphone by leaving it on the counter, the personal information stored on the smartphone may be exposed to others, and the smartphone may be lost. In addition, when charging is performed by using the charging jack prepared in advance, there is inconvenience that the charging jack is always provided and there is a case that the filling of the internal structure of the restaurant can not be done at all.

In addition, near field communication NFC (Near Field Communication) has recently been activated and a variety of media promotion methods using a QR code have been proposed.

It is an object of the present invention to maximize the effect of the advertisement exposure through the display by charging the user terminal by allowing the charging service to be provided only after the advertisement is exposed in the charging apparatus having the display.

According to an aspect of the present invention, there is provided a portable terminal including a charging jack for inserting a charging jack, wherein when an electric energy stored in advance is transmitted to a user terminal connected through the charging jack, It is possible to provide a charging device that provides electrical energy thereafter.

In a preferred embodiment, the user terminal may be a smart phone, and the charging device further comprises at least one charging connection, wherein the charging connection receives electrical energy from a stacked or parallel charger. The charging device also exposes the advertisement through the display before charging the user terminal and during charging. The advertisement may be stored in advance in a memory provided in the charging apparatus or may be provided from a central control server located remotely through a communication network.

The advertisement may also be provided from a central control server located remotely via a communication network via a local control server located in the service shop, for example the local control server may be a cradle capable of connecting a plurality of charging devices .

A charging device according to an embodiment of the present invention includes a controller for determining that an advertisement has been exposed for a predetermined period of time and controlling the start of charging, a display for outputting the advertisement, and a display for outputting electric energy And a charging unit for providing the battery.

As described above, according to the present invention, a customer can conveniently charge a mobile electronic device, particularly a smartphone, at his / her place, and a charging service is provided only when the user views an advertisement before charging the smartphone. The effect can be maximized.

According to the present invention, a service trader, in particular a business operator of a foodservice business, can increase sales by raising the collecting power by utilizing the customer preference for the business where the filling device is provided, and if the self- have. In addition, there is a benefit to charge an advertisement fee when an advertisement of another person is exposed, and an opportunity to receive various services from a communication carrier can be expanded when using a communication network.

According to the present invention, the advertiser can maximize the advertisement effect by allowing the advertiser to concentrate on the advertisement before the charging time by exposing the advertisement before the charging is performed, and it is possible to maximize the advertisement effect, Can be provided. Also, by providing updated content from time to time, advertisement exposure can be performed more efficiently.

According to the present invention, a communication carrier can have an opportunity to generate new revenue by providing an environment for providing advertisement contents at a remote place.

FIG. 1 is a diagram illustrating a charging state in which a user terminal is connected to a charging device according to an embodiment of the present invention.
Figs. 2 and 3 are perspective views of the charging apparatus according to the present invention as viewed from above and below. Fig.
FIG. 4 is a view schematically showing an aggregate type charging apparatus for stacking and charging a plurality of charging apparatuses according to an embodiment of the present invention.
5 is a block diagram schematically showing functional configurations of a charging apparatus according to an embodiment of the present invention.
6 is a view showing another embodiment of the collective type filling apparatus including a plurality of filling apparatuses according to the present invention.
FIG. 7 is a schematic diagram illustrating a configuration of a charging module according to an exemplary embodiment of the present invention. Referring to FIG.
8 and 9 are views schematically showing an environment in which a charging device according to an embodiment of the present invention receives advertisement contents remotely.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used 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.

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. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

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 "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, 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 should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

FIG. 1 is a diagram illustrating a charging state in which a user terminal is connected to a charging device according to an embodiment of the present invention.

Referring to FIG. 1, the charging apparatus 100 is connected to the user terminal 200 through a charging jack 300.

The charging apparatus 100 may include a display 130, a plurality of charging connections 125 and 126, and a charging jack inlet 120 into which the charging jack 300 is drawn. The display 130 is formed on one side of the charging apparatus 100 and the charging connection units 125 and 126 provide power to the charging apparatus 100 so that the charging apparatus 100 can charge the user terminal 200 The conductive terminals may be formed of conductive terminals.

A customer who wants to charge a service shop, especially a customer entering a foodservice company, can receive the charging device 100 and / or the charging jack 300 according to the present invention. The customer who has received the charging apparatus 100 according to the present invention can enter the charging jack 300 into the charging jack inlet 120 of the user terminal 200 such as a smart phone as shown in FIG. And may be connected to the charging apparatus 100 to start charging.

The charging device 100 according to the present invention supplies power, that is, electric energy, to the user terminal 200 after the advertisement is exposed through the display 130. [ Accordingly, the customer can charge the user terminal 200 after watching the advertisement, so that the user can concentrate more on the advertisement and maximize the advertisement effect.

The process of supplying power to the user terminal 200 after the advertisement is exposed to the charging device 100 may be performed in a different manner depending on the embodiment. For example, when the charging device 100 determines that the advertisement is exposed through the display 130, the charging device 100 can supply power to the user terminal 100 through the charging start portion. This charging start method will be described later with reference to Fig.

Figs. 2 and 3 are perspective views of the charging apparatus according to the present invention as viewed from above and below. Fig. 4 is a perspective view showing a configuration in which a plurality of charging devices according to the present invention are stacked to supply power.

2 and 3, the charging apparatus 100 according to the present invention includes a charging jack inlet 120 provided at one side of a side, a plurality of charging connectors 125 provided at a top edge, And a bottom connection part 125 provided at a corresponding position so as to be connected to the charging connection part of another charging device when stacked.

The plurality of charging connection portions 125 provided on the upper and lower surfaces of the charging apparatus 100 may be formed by stacking or parallelly arranging the charging apparatus 100 in a stacked charger or parallel charger to be described with reference to FIG. The electric energy is received from the charger directly or through another charging device 100 and stored therein.

Also, according to the embodiment, the charging apparatus 100 may include the charging connection portion 126 on the other side of the side surface. In the case where the charging connection unit 125 is provided on the upper and lower surfaces, electric energy can be supplied from the other charging apparatus 100 or the power supply apparatus when the charging apparatus 100 is stacked. However, When the charging connection unit 126 is included on the other side, the cradle connected to the power supply line and the charging connection unit 126 may be connected to store the electric energy.

FIG. 4 is a view schematically showing an aggregate type charging apparatus for stacking and charging a plurality of charging apparatuses according to an embodiment of the present invention.

4, the collective type charging apparatus has a cradle 140 capable of stacking a plurality of charging apparatuses 100, and a plurality of charging apparatuses 100 are stacked, Can be applied. A portion of the applied electrical energy is stored internally through a fill connector 125 (FIG. 3) provided on the underside of the fill apparatus 100 with the lowermost display, and another portion of the applied electrical energy is stored in the fill apparatus 100 are transferred to another charging device 100 stacked thereon via a charging connection 125 (see FIG. 2) provided on the upper surface of the charging device 100, and a part of the charging device 100 is stored in another charging device 100.

Using this method, a plurality of stacked charging devices 100 can be charged. The charging device 100 having the charged display can be used to charge the user terminal 200 of the customer paid to the customer who wants to charge. An example of the parallel charging will be omitted.

In accordance with an embodiment, the cradle 140 also functions as a local server. The cradle 140 communicates with a remote server as a local server to receive content such as an advertisement and to sequentially provide content to the plurality of charging devices 100. The information transmitted from the plurality of charging devices 100 To the remote server. The role of the cradle 140 as a local server will be described in detail with reference to FIG.

5 is a block diagram schematically showing functional configurations of a charging apparatus according to an embodiment of the present invention.

5, the charging apparatus 100 includes a controller 110, a charger 120, a display 130, a memory 190, an input unit 150, a communication unit 160, an NFC unit 170, (180).

The control unit 110 controls the overall operation of the charging unit 120, the display 130, the memory 190, the input unit 150, the communication unit 160, the NFC unit 170, and the sensor unit 180, A register for temporary storage of data and instructions, and a controller for controlling the operation of the charging device 100. The ALU 110 may be a memory,

The control unit 110 according to an embodiment of the present invention may include a charge control unit 111 and a display control unit 113. After the advertisement is exposed through the display control unit 113, The user can control the charging unit 120 to supply electric energy to the user terminal 200 through the charging control unit 111. [

The control unit 110 may receive an input signal of the user received through the input unit 150 (for example, a power supply request switch), and may provide an advertisement including content through the display 130. Also, according to the embodiment, the control unit 110 can start advertisement exposure when a physical connection is established between the charging device 100 and the user terminal 200 through the charging jack 300.

According to the embodiment, the advertisement may be stored in the memory 190 and the exposure time of the corresponding advertisement may be stored in the memory 190 as well.

The control unit 110 counts a lapse of a predetermined time after the advertisement is provided on the display 130. [ Here, the predetermined time may be a time at which the advertisement effect can be sufficiently viewed, and may correspond to an average time in which one advertisement is provided. In addition, the controller 110 may count a different predetermined time for each specific advertisement based on the information stored in the memory 190. [ That is, it is possible to count the elapse of the same preset time for all advertisements. However, if the exposure time for each advertisement is stored together in the memory 190, Time can be counted.

The charging control unit 111 of the control unit 110 controls the charging unit 120 to supply the electric energy to the user terminal 200. When the predetermined period of time elapses, In order to provide the charging service after the advertisement is exposed in such a manner, in order to receive the charging service, the user first sees the advertisement. Therefore, we can maximize the effect of advertisement exposure.

The control unit 110 may be a company including Alpha of Digital, MIPS technology, MIPS of NEC, IDT, Siemens, Intel, Cyrix, AMD and Nexgen X86, and PowerPC from IBM and Motorola. ≪ Desc / Clms Page number 2 >

The control unit 110 may control the display control unit 113 to provide an advertisement completion mark such as a QR code or a serial number that can start charging through the display 130 after the advertisement exposure is completed. The advertisement completion mark provided through the display 130 of the charging apparatus 100 is read through the user terminal 200 and the input of the user terminal 200 is received through the input unit 150. [ The control unit 100 may cause the charging unit 120 to start charging based on the information of the advertisement completion mark received through the input unit 150. [ That is, when receiving the advertisement completion mark information, the controller 100 determines that the predetermined time has elapsed after the advertisement is exposed.

The charging unit 120 stores the electrical energy transferred from the power supply line in the collective charging apparatus described with reference to FIG. 4 or the collective charging apparatus to be described with reference to FIG. 6, and controls the user terminal 200). ≪ / RTI > As described above, the charging apparatus 100 according to the embodiment of the present invention is controlled to start charging after the advertisement is exposed to the customer.

After the advertisement is exposed, the charging unit 120 charges the user terminal 200 by transmitting the electric energy stored therein to the user terminal 200 through the charging jack 300. [

The charging unit 120 according to an embodiment of the present invention can be controlled to start charging after the advertisement is exposed to the customer under the control of the controller 110. [

The input unit 150 transmits an external input, such as a user command, to the control unit 110. For example, the input unit 150 may include a physical button provided in the charging apparatus 100, a user input input through the display 130, and an input signal provided through the user terminal 200, An input provided through an interface between the device 100 and the like. As described above, the input unit 150 may receive an input of a power supply request switch of the user.

An interface is formed between the charging device 100 and the user terminal 200 in a state where the charging device 100 and the user terminal 200 are connected through the charging jack 300. [

A user command input through the user terminal 200 may be provided to the input unit 150 of the charging device 100. [ When the advertisement completion mark such as the QR code is provided through the display 130 after the advertisement exposure is completed as described above, the customer recognizes the advertisement completion mark through the user terminal 200, The recognized advertisement completion mark information can be input through the input unit 150 of the charging apparatus 100. [

According to the embodiment, when the advertisement completion mark is exposed after the advertisement exposure is completed, the control unit 110 may start the charging of the charging unit 120 by receiving the input of the user terminal 200 through the input unit 150 have. In other words, the control unit 110 does not count the predetermined time after the advertisement starts to be provided to the display 130, but the recognition code such as the QR code or the serial number provided after the advertisement exposure is completed It may be determined that the customer has completed the advertisement viewing and the charging service may be provided.

The communication unit 160 is a communication interface for receiving advertisement contents from a remote central control server through a communication network provided by a communication provider or via a local control server in the form of a PC located in a service shop. The communication unit 160 can perform a wired or wireless network connection.

The NFC unit 170 includes an NFC chip to perform an NFC connection with the user terminal 200. [ The NFC connection state information with the user terminal 200 is provided to the control unit 110. The control unit 110 controls the charging unit 120 to provide the charging service to the user terminal 200 based on the NFC connection state information can do.

The control unit 110 may receive information indicating that an NFC connection has been established between the charging device 100 and the user terminal 200 and may provide an advertisement to the display 130 of the charging device 100 Or may be provided on a display provided in the user terminal 200. [ The controller 110 recognizes that the NFC connection has been established, such as a power supply request switch, as information indicating that advertisement exposure has started. The control unit 110 transmits electric energy to the user terminal 200 The charging unit 120 can be controlled.

The control unit 110 detects the NFC connection state in real time and stops providing the advertisement through the display control unit 113 when the NFC connection is interrupted and transmits the advertisement through the charge control unit 111 to the charging unit 120, Thereby stopping the operation of providing the terminal 200 with electrical energy.

The sensor unit 180 is provided near the charging device 100 and in particular the display 130 to determine whether the display 130 is placed against the floor or an object is placed on the display 130 to obscure the display 130 Detection. Obscuring the display 130 implies that it does not view the advertisement. According to an embodiment, the sensor portion 180 may include a proximity sensor and / or a gravity sensor.

The sensing information of the sensor unit 180 is provided to the control unit 110. In the process of providing the charging service after the predetermined time has elapsed after the control unit 110 starts providing the advertisement, Lt; / RTI >

In other words, as described above, the control unit 110 starts providing the advertisement in response to the event such as the input of the power supply request switch or the NFC connection setting, and after the predetermined time has elapsed since the advertisement is provided, (120) to provide a charging service.

However, if the customer hides the display 130 without watching the advertisement while the recharging service is being provided, the effect of advertisement exposure can not be expected. Accordingly, the control unit 110 can receive the sensing information through the sensor unit 180 in real time, and stop the counting of the predetermined time when the customer does not watch the advertisement.

According to the embodiment, the control unit 110 may control the charging unit (not shown) according to the detection information of the sensor unit 180 so that the user can be encouraged to watch the advertisement even after the charging service is started after a predetermined time elapses after the advertisement is initially exposed. 120, respectively. The control unit 110 may receive the sensing information from the sensor unit 180 in the course of providing the charging service and stop the charging service when the display 130 is hidden.

The memory 190 may receive content received from an external server and store the exposure time of the content. In addition, the time when the advertisement is provided in the charging device 100 can be stored and used for cost calculation by the advertisement providing. The memory 190 may be comprised of volatile and / or nonvolatile memories.

6 is a view showing another embodiment of the collective type filling apparatus including a plurality of filling apparatuses according to the present invention.

Referring to FIG. 6, the collective charging apparatus may include a cradle 140 'into which a plurality of charging apparatuses 100 may be inserted. The cradle 140 'includes a power supply unit 143 that can be connected to the charge connection unit 126 formed on the other side of each of the charging devices 100 and a power line connection unit 141 to which the power supply line can be connected .

Each of the charging devices 100 is inserted into the collective charging device, and electric energy is supplied to the charging device 120 via the corresponding power supply part 143 to store electric energy in the charging part 120.

The cradle 140 'may also function as a local server to communicate with a remote server to receive content such as advertisements or transmit information stored in the memory 190 of the charging devices 100 to a remote server have. In particular, when the plurality of charging devices 100 are connected, the cradle 140 'sequentially transmits information to the plurality of charging devices 100 after receiving a plurality of contents through one connection And distributes the network.

For example, the cradle 140 'may transmit the play time of the advertisement provided through the display 130 of the charging device 100 and the load data of the play count to the remote server, The image file can be received.

FIG. 7 is a schematic diagram illustrating a configuration of a charging module according to an exemplary embodiment of the present invention. Referring to FIG.

7, the charging apparatus includes an API (Application Program Interface) 700, a high-level command processing unit 710, an application module control unit 720, and an application module 730).

The high level command processing unit 710 identifies each corresponding application module 730 according to the high level command provided from the API 700, decodes the high level command, and provides the decoded high level command to the corresponding application module. That is, the high-level command processing unit 710 decodes the high-level command processing unit 710 into a command recognizable by the application module 730 corresponding to the high-level command provided through the API 700 and transmits the decoded command to the corresponding mapping unit, .

The application module control unit 720 controls the operation of the application module 730 according to a command provided from the high-level command processing unit 710. The application module control unit 720 controls the mapping units 721, 723, and 723 corresponding to the charging module 732, the advertisement exposure module 734, the calling module 736, and the communication module 738 included in each application module 730, 725, and 727 and interface units 722, 724, 726, and 728, respectively.

The charging module mapping unit 721 receives the electric energy from the stack type charger and stores the stored electric energy in the charging module 732. The charging module 732 receives the stored electric energy to the user terminal 200 and receives a high- Level command and provides it to the charging module 732 through the charging module interface unit 722. [

Since the charging apparatus 100 according to the embodiment of the present invention must start charging after the advertisement exposure is completed, the high level command provided to the charging module mapping unit 721 is a charging It can be understood that the controller 113 is provided with an instruction that the advertisement exposure is completed and the charging may now be started.

The advertisement exposure module mapping unit 723 receives a high level command for providing advertisement contents stored in advance or via a communication network from a remote central control server through the display 130 of the charging apparatus 100, Level command that can be processed by the module 734 and provides it to the advertisement exposure module 734 through the advertisement exposure module interface unit 724. [ According to an embodiment, the advertisement content may be provided through a display included in the user terminal 200. [

The calling module mapping unit 725 receives the electric energy from the stack type charger to complete the charging or transmits the stored electric energy to the user terminal 200. When the charging of the user terminal 200 is completed, To the local control server located in the local control server, or a high-level command for delivering the customer's call request to the local control server. The calling module mapping unit 725 maps the received high level command to a device level command that can be processed by the calling module 736 and provides it to the calling module 736 via the calling module interface unit 726.

The communication module mapping unit 727 receives a high-level command for receiving advertisement contents from a remote central control server through a communication network provided by a communication provider or via a local control server in the form of a PC located in a service shop , And maps it to a device level command that can be processed by the communication module 738. The communication module mapping unit 727 provides the mapped device level command to the communication module 738 via the communication module interface unit 728. [ The communication module 738 may include a physical transmission interface for sending and receiving data, either directly to the remote central control server, or via a local control server located in the service store, as needed. For example, the physical transmission interface may include a communication interface such as an SS7 voice network interworking interface or a TCP / IP network interworking interface.

The application module 730 includes a charging module 732 for receiving and storing electric energy from the stacking type charger and transferring the stored electric energy to the user terminal 200 to charge the advertisement contents to the user terminal 200, An advertisement exposing module 734 for exposing the advertisement to the user terminal 200, a charging module 734 for receiving the electric energy from the stacking type charger, or charging the user terminal 200 with the stored electric energy to the user terminal 200 A call module 736 for forwarding the event to a local control server located in the service store or for forwarding the customer's call request to the local control server, A communication module 738 for receiving advertisement contents via a local control server in the form of a PC located in a service shop, It can be included.

8 and 9 are views schematically showing an environment in which a charging device according to an embodiment of the present invention receives advertisement contents remotely.

8 and 9, the communication unit 160 or the communication module 738 of the charging apparatus 100 according to the present invention may be connected to a remote location through the SS7 voice network or the TCP / The content and the updated content can be received from the control server 500 directly or through the local control server 600 located in the service shop.

The provided contents may be provided directly through the display 130 of the charging device 100 or may be provided to the user terminal 200 through the NFC chip or QR code of the charging device 130 and output to the user terminal 200 or in real time Can be output.

According to the embodiment, the cradle 140, 140 'provided in the form of an aggregate type charger as shown in FIGS. 4 and 6 may correspond to the local control server 600. The cradles 140 and 140 'receive and store contents and the like from the central control server 500, and can sequentially provide contents to the plurality of charging devices 100. [

As the local control server 600 is electrically connected to the plurality of charging devices, it is possible to distribute network traffic when a plurality of charging devices access the central control server 500 all at once, Can sequentially control the network connection of the charging devices.

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 exemplary embodiments or constructions. You can understand that you can do it. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

While the present invention has been described with reference to the preferred embodiments thereof, 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 and scope of the invention as defined in the appended claims. It will be understood.

100: Charging device
110:
120:
130: Display
190: Memory
150:
160:
170: NFC section
180:

Claims (8)

A controller for determining that the advertisement has been exposed for a predetermined time and controlling the start of charging;
A display for outputting said advertisement; And
And a charging unit that provides electric energy to the user terminal based on the charge start control. The method according to claim 1,
Further comprising an input for receiving a power supply request from a user,
Wherein the control unit starts the advertisement exposure in response to the power supply request and controls the charging start of the charging unit when the predetermined time elapses. The method of claim 2,
Wherein the input unit performs an interfacing function for receiving an input from the user terminal, and transfers the received input to the control unit. The method of claim 3,
Wherein the input unit receives the advertisement recognition code from the user terminal and provides the advertisement recognition code to the control unit, and the control unit determines that the advertisement is exposed for the predetermined time based on the advertisement recognition code, Lt; / RTI > The method according to claim 1,
And an NFC unit for connection with the user terminal,
Wherein the control unit starts the advertisement exposure when an NFC connection with the user terminal is established, and controls the charging start of the charging unit when the predetermined time elapses. The method according to claim 1,
Wherein the control unit controls the advertisement exposure by recognizing a physical connection with the user terminal. The method according to claim 2 or 5,
Further comprising a sensor unit for detecting that the display is covered,
Wherein the control unit suspends the passage of the predetermined time according to the detection result of the sensor unit. The method according to claim 1,
Further comprising a sensor unit for detecting that the display is covered,
Wherein the control unit stops supply of electric energy to the user terminal when the display is hidden according to the detection result of the sensor unit.

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