KR101065640B1 - Electronic shelf label tag system and tag thereof, tag control method - Google Patents

Electronic shelf label tag system and tag thereof, tag control method Download PDF

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KR101065640B1
KR101065640B1 KR1020090110547A KR20090110547A KR101065640B1 KR 101065640 B1 KR101065640 B1 KR 101065640B1 KR 1020090110547 A KR1020090110547 A KR 1020090110547A KR 20090110547 A KR20090110547 A KR 20090110547A KR 101065640 B1 KR101065640 B1 KR 101065640B1
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South Korea
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tag
information
period
product information
wake
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KR1020090110547A
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Korean (ko)
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KR20110053858A (en
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서대화
안태식
양은주
이정미
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경북대학교 산학협력단
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Abstract

An electronic shelf label tag system according to the present invention comprises: an electronic shelf label server for receiving and transmitting product information change period information from a portable terminal for a manager or a point-of-sale device; Receive wake-up period setting information, set a wake-up period, receive time slot assignment information, set a time slot period, and when the set wake-up period arrives, wakes up the communication module and performs communication during the time slot period. A plurality of tags; Receiving the product information change period information from the electronic shelf label server to set the wake-up period corresponding to the product information change period information, and to each of the plurality of tags for communication with each of the plurality of tags during the wake-up period A time slot period assigned to a tag to communicate with when a time slot is allocated and a wake-up period setting information and a time slot assignment information are transmitted to each of the plurality of tags, and when communicating with any one of the plurality of tags And a tag manager which communicates in the time slot period of the tag to communicate within the wake-up period.
Figure R1020090110547
Electronic shelf labeling systems, tags

Description

Electronic shelf label tag system and tag, tag control method}

The present invention relates to an electronic shelf label tag (ESL) system. More specifically, the tag manager sets a wake-up period and time slot for a plurality of tags according to a request of an ESL server. By communicating with a plurality of tags through the time slot, it is possible to change the product information, to wake up only during a predetermined period of time to minimize the power consumption in the tag, a large number through the communication through the time slot The present invention relates to an electronic shelf label tag system and a tag and a tag control method for minimizing a change time of product information for a tag.

In general, large or small and medium-sized stores adopt a method of attaching a paper with a price printed on the shelf where the product is displayed to guide the price of the product. The hassle of attaching to this shelf is inherent.

In order to solve this problem, the ESL system guides product price information using ESL tags, and adds various promotion information such as price per unit, sale price, normal price, product display position, point information, and display quantity. It helped to purchase goods and run the store.

However, the above-described ESL system takes a lot of time when changing price information for hundreds to thousands of tags due to the one-way low speed communication. There was a problem giving.

In addition, when the price information is changed directly in the tag, there is a problem that information sharing with the ESL server is not performed in real time.

According to the present invention, the tag manager sets a wake-up period and a time slot for a plurality of tags according to a request of the ESL server, and communicates with the plurality of tags through the time slot to change the product information. The electronic shelf label tag system and its tag, which can be woken up only for a period of time, minimize the power consumption of the tag, and minimize the change time of product information for a large number of tags through communication through the timeslot, It is an object to provide a tag control method.

In addition, another object of the present invention is to provide a plurality of tags with a reed switch switched by a magnet to generate an interrupt for forced wake-up, so that the appearance of the tag can be simply and beautifully configured, The present invention provides an electronic shelf label tag system and a tag and tag control method that can increase the life of a tag by eliminating hardware manual manipulation.

In addition, another object of the present invention is the ESL server and the POS device through the tag manager to the product information change information through the tag manager when the product information is changed through communication with the administrator portable terminal in the state that the tag is forced wake up The present invention provides an electronic shelf labeling system and a tag and tag control method according to the present invention, which enables product information changes in a tag to be reflected in a POS device in real time.

Electronic shelf label tag system according to the present invention for achieving the above object, the electronic shelf label server for receiving and transmitting the product information change period information from a portable terminal for a manager or a point-of-sale (POS) device; Receive wake-up period setting information to set a wake-up period, receive time slot assignment information to set a time slot period, and when the set wake-up period is reached, wakes up the communication module and performs communication during the time slot period. A plurality of tags; Receiving the product information change period information from the electronic shelf label server to set the wake-up period corresponding to the product information change period information, and to each of the plurality of tags for communication with each of the plurality of tags during the wake-up period A time slot period assigned to a tag to communicate with when a time slot is allocated and a wake-up period setting information and a time slot assignment information are transmitted to each of the plurality of tags, and when communicating with any one of the plurality of tags And a tag manager which communicates in the time slot period of the tag to communicate within the wake-up period.

According to the present invention, the tag manager sets a wakeup / sleep period and a time slot for a plurality of tags according to a request of the ESL server, and communicates with a plurality of tags through the time slot to change the product information. In addition, it is possible to minimize the power consumption in the tag by allowing the user to wake up only for a preset period of time, and to minimize the change time of the product information for a large number of tags through the communication through the timeslot.

In addition, the present invention provides a plurality of tags with a reed switch operated by a magnet to generate an interrupt for forced wake-up, so that the appearance of the tag can be simply and beautifully constructed, as well as the hardware of the tag. It is effective to increase the life of the tag by eliminating manual manipulation.

In addition, in the present invention, when the product information is changed through communication with the manager portable terminal in the state that the tag is forced wake-up, the tag transmits the product information change information in real time to the ESL server and the POS device through a tag manager In addition, the product information change in the tag can be reflected to the POS device in real time, thereby improving the reliability of the electronic shelf label system and the POS device.

<Configuration of Electronic Shelf Labeling System>

A configuration of an electronic shelf label system according to a preferred embodiment of the present invention will be described with reference to FIG. 1.

The electronic shelf label system includes first to N th tags 1041 to 104N, a tag manager 102, and an ESL server 100.

The ESL server 100 receives product information change period information from an administrator through a user terminal or a point-of-sale (POS) device (not shown), and the product information change period information is an opening preparation time of a store. Or a time service time. In addition, the ESL server 100 receives product information from an administrator through a user terminal or POS device 106, which is not shown, and the product information includes tag identification information, product identification information, and price information. In particular, the product information may be added promotion information such as price per unit, sale price, normal price, product display position display, point information, display quantity.

The ESL server 100 provides the product information change period information and the product information input from the manager to the tag manager 102.

When the tag manager 102 receives the product information change period information from the ESL server 100, the tag manager 102 corresponds to the first to N th tags 1041 to 104N to correspond to the product information change period information. A wake-up / sleep period is set, a time slot is allocated, and the wake-up / sleep period information and the time slot assignment information are transmitted to first to N th tags 1041 to 104N, and the first to The N'th tags 1041 to 104N can set their own wakeup / sleep periods and their timeslots according to the wakeup / sleep period information and the timeslot assignment information.

In addition, the tag manager 102 provides a synchronization signal for every communication with the first to N th tags 1041 to 104N, and the first to N th tags 1041 to 104N control synchronization according to the synchronization signal. Thus, accurate synchronization can be achieved between the tag manager 102 and the first to N th tags 1041 to 104N.

In addition, when the product information is received from the ESL server 100, the tag manager 102 checks whether a time slot of a tag corresponding to the tag identification information included in the product information arrives. Upon arrival, the product information is transmitted to the corresponding tag so that the product information of the tag can be changed. In addition, the tag manager 102 transmits the product information change completion information from the tag to the ESL server 100 through the timeslot.

In addition, the tag manager 102 transmits the product information change information to the ESL server 100 when the product information change information is received from the forced wake-up tag through the manager portable terminal 108. The tag manager 102 always operates in a wake-up state without a sleep period for real-time communication with the forced wake-up tag. As such, since the tag manager 102 always operates in the wake-up state, the tag may notify the tag manager 102 of the completion of the change regardless of its time slot after the product information change and the tag wake-up period change are completed. .

In addition, the first to N th tags 1041 to 104N activate a communication module when their time slot arrives during the wake-up period, and switch to a state in which communication with the tag manager 102 is possible, and the tag manager 102. When the tag manager 102 transmits the wakeup / sleep period information and the timeslot assignment information in a communication enabled state, the tag manager 102 receives the wakeup / sleep period information and the timeslot assignment information, and receives the wakeup / sleep period information. Resets its wakeup / sleep period and timeslot period according to the timeslot assignment information.

In addition, the first to N th tags 1041 to 104N activate a communication module when their time slot period arrives during the wakeup period, and switch to a state in which communication with the tag manager 102 is possible, and the tag manager 102. When the product information is received from the tag manager 102 in a communication enabled state, the previously stored product information is changed based on the received product information and displayed on the display device. Also, the tag generates product information change completion information indicating that the change of the product information is completed and returns to the tag manager 102.

In addition, the first to N th tags 1041 to 104N include a reed switch (LEAD SWITCH) which is driven through a magnet of the manager portable terminal 108, and forcibly wakes up that the reed switch is turned on. Recognizes as an interrupt and wakes up the communication module to receive the product information from the manager portable terminal 108, change the previously stored product information according to the received product information, and display it on the display device, the product Combining the information with its own identification information to generate the product information change information and transmits to the tag manager (102).

The manager portable terminal 108 includes a magnet for driving the reed switches of the first to Nth tags 1041 to 104N, and performs communication with the tag waked up by the forced wakeup interrupt. Send product information.

<Configuration of Tag Manager 102>

The configuration of the tag manager 102 according to the preferred embodiment of the present invention will be described with reference to FIG.

The tag manager 102 includes a control unit 200, a memory unit 202, a synchronization control unit 204, an RF communication module 206, and a power source 208.

When the product information change period information is received from the ESL server 100, the controller 200 wakes up the first to Nth tags 1041 to 104N so that the tag manager 102 corresponds to the product information change period information. Set up / sleep periods, allocate timeslot periods, transmit wakeup / sleep period information and timeslot allocation information to first to Nth tags 1041 to 104N, and the first to Nth A synchronization signal is provided for each communication with the tags 1041 to 104N.

When the product information is received from the ESL server 100, the controller 200 checks whether a time slot of a tag corresponding to the tag identification information included in the product information arrives, and when the time slot of the tag arrives. The product information is transmitted to the corresponding tag, and when the product information change completion information is received from the tag that receives the product information, the product information change completion information is transmitted to the ESL server 100.

In addition, when the product information change information is received from the tag, the controller 200 transmits the product information change information to the ESL server 100.

The memory unit 202 stores various information including a processing program of the controller 200.

The synchronization controller 204 includes a real time clock (RTC) and a binary counter. The RTC outputs real-time time information as an output value, which is used as information for detecting wakeup / sleep periods of the first to Nth tags 1041 to 104N. This RTC allows the wake up / sleep period to be set long. The binary counter outputs a count value obtained by counting a high speed clock as an output value, and the count value of the binary counter is used as information for detecting a time slot of tags and a timing of generating a synchronization signal. Since the count value of such a binary counter is generated according to a high speed clock, it is possible to set a short time slot for each of the tags, so that the change of product information for a large number of tags can be performed at a high speed.

The RF communication module 206 is responsible for communication between the controller 200, the ESL server 100, and the first to N th tags 1041 to 104N. The RF communication module 206 does not have a sleep period for real time communication with the forced wakeup tag.

The power source 208 supplies power to each part of the tag manager 102.

<Configuration of Tag>

A configuration of any one of the first to N th tags 1041 to 104N according to the preferred embodiment of the present invention will be described with reference to FIG. 3.

The tag includes a controller 300, a memory unit 312, a display device 302, a lead switch 304, a synchronization controller 306, an RF communication module 308, and a power supply 310.

The controller 300 controls the tag as a whole, and will be described below.

When the time slot period arrives during the wake-up period, the controller 300 activates the RF communication module 308 to switch to a state in which communication with the tag manager 102 is possible, and communicate with the tag manager 102. Receive wakeup / sleep period information and timeslot assignment information from the tag manager 102 in the state, and reset its wakeup / sleep period and timeslot period according to the wakeup / sleep period information and timeslot assignment information. do.

In addition, when the time slot period arrives during the wake-up period, the controller 300 activates the RF communication module 308 to switch to a state in which communication with the tag manager 102 is possible, and communicate with the tag manager 102. When the product information is received from the tag manager 102 in the enabled state, the stored product information is changed according to the received product information and displayed on the display device 302, and the product information change completion information is displayed. Send to 102.

In addition, the control unit 300 wakes up the RF communication module 308 when the forced wakeup interrupt is recognized as the reed switch 304 is turned on through the magnet of the manager portable terminal 108 to wake up the RF communication module 308. Receives the product information from the 108, stores the received product information in the memory unit 312, and displays through the display device 302, by combining the product information and their identification information product information change information Generate and transmit to the tag manager 102.

The memory unit 312 stores various information including a processing program of the control unit 300, and particularly, stores product information.

The display device 302 displays various types of information under the control of the controller 300.

The reed switch 304 is turned on as a magnet or the like approaches and provides an on signal to the controller 300 to generate a forced wakeup interrupt.

The synchronization control unit 306 is composed of a real-time clock (RTC) and a binary counter. The RTC outputs real-time time information as an output value, which is used as information for detecting a wakeup / sleep period of the first to Nth tags 1041 to 104N, and the RTC extends the wakeup / sleep period. To be set. The binary counter outputs a count value obtained by counting a high speed clock as an output value, and the count value of the binary counter is used as information for detecting its timeslot period. The clocks of the RTC and the binary counter are synchronized according to a synchronization signal from the tag manager 102 under the control of the control module 300.

The RF communication module 308 sleeps or wakes up under the control of the controller 300, and the tag manager 102 and the controller 300 during timeslots assigned to the tag under the control of the controller 300. It is in charge of communication between. In addition, the RF communication module 308 forcibly wakes up under the control of the controller 300 to perform communication between the manager portable terminal 108 and the controller 300.

The power supply 310 supplies power to each part of the tag.

<Flowchart of tag control method>

Now, a tag control method according to a preferred embodiment of the present invention will be described.

First, a process of setting a wakeup / sleep period and a time slot of a tag according to a product information change period will be described with reference to FIGS. 4 and 5.

When the ESL server 100 requests the product information change period setting through the POS device 106 or the manager portable terminal (not shown), the ESL server 100 receives the product information change period information and transmits it to the tag manager 102 (400,402). step).

The tag manager 102 receiving the product information change period information sets the wakeup / sleep periods for the first to N th tags 1041 to 104N and the first to the first to the N th tags 1041 to 104N according to the product information change period information. A time slot for each of the N tags 1041 to 104N is allocated (step 404).

On the other hand, the first to N-th tag (1041 ~ 104N) monitors whether each wake-up period is based on the RTC time information, and when the wake-up period is reached, after the wake-up period is reached, the binary count of the binary count While monitoring whether the user has arrived in his or her time slot based on the count value, when the user reaches his or her time slot, communication with the tag manager 102 is started (steps 500, 504, 506 and 510).

In addition, the tag manager 102 checks whether a time slot allocated to each tag has arrived in the preset wake-up period based on the output values of the RTC and the binary counter (step 406).

The tag manager 102 transmits the wakeup / sleep period setting information and the timeslot assignment information for each of the tags in which the timeslot arrives after the wakeup (step 408).

The tag receiving the wakeup / sleep period setting information transmitted from the tag manager 102 resets the wakeup / sleep period and the timeslot period according to the received wakeup / sleep period setting information, and indicates that the setting is completed. The set completion information to be guided is transmitted to the tag manager 102 (steps 512 and 516).

When the tag manager 102 receives the setting completion information on the wakeup / sleep period setting and the time slot setting from the tag, the tag manager 102 transmits the setting completion information to the ESL server 100 so that the ESL server 100 changes its product information. The result of the period setting request can be returned (steps 410, 412, 414).

On the other hand, the tag that has transmitted the setting completion information checks whether its time slot has elapsed based on the output value of the binary counter, and if its time slot has elapsed, switches the RF communication module to the communication standby state (steps 518 and 520).

In addition, the tag checks whether the sleep period has arrived based on the output value of the RTC, and if the sleep period has arrived, the tag switches the RF communication module to the sleep mode (steps 522 and 524).

6 and 7, the process of changing the product information will be described in detail.

The ESL server 100 transmits the input product information to the tag manager 102 when the product information is requested to be changed and the product information is input through the POS device 106 or the manager portable terminal (not shown) (600,602). step). Here, tag identification information is added to the product information.

Upon receiving the product information, the tag manager 102 checks whether the time slot of the product information change status corresponding to the identification information included in the product information has arrived during the wake-up period (step 604). When the time slot of the product information change status is reached, the tag manager 102 transmits the product information to the corresponding tag (step 606).

On the other hand, the first to N-th tag (1041 ~ 104N) monitors whether each wake-up period is based on the RTC time information, and when the wake-up period is reached, after the wake-up period is reached wakes up the RF counter module of the binary counter It monitors whether the time slot period has arrived based on the count value, and starts communication with the tag manager 102 when the time slot period reaches its own time slot (steps 700, 704, 706, and 710).

The product information change status among the tags is received from the tag manager 102 after commencement of the communication of the tag manager 102. The product information change status state changes the previously stored product information according to the received product information and transmits the product information change completion information to the tag manager 102 (steps 712 and 714).

When the tag manager 102 receives the product information change completion information from the tag, the tag manager 102 transmits it to the ESL server 100 so that the ESL server 100 can receive a result according to its product information change request. (Steps 608,610,612).

On the other hand, the tag that has sent the product information change completion information checks whether its time slot has elapsed based on the output value of the binary counter, and if its time slot has elapsed, switches the RF communication module to the communication standby state (steps 716 and 718). .

In addition, the tag checks whether the sleep period has arrived based on the output value of the RTC, and if the sleep period has arrived, the tag switches the RF communication module to the sleep mode (steps 720 and 722).

A process of changing price information in a tag will now be described in detail with reference to FIG. 8.

The magnet attached to the manager portable terminal 108 is close to the reed switch of any one of the first to Nth tags 1041 to 104N, and the controller of the tag is forced to wake up as the reed switch is turned on. If it recognizes the control unit of the tag wakes up the RF communication module and switches to the communication enabled state (step 800, 802).

Thereafter, the controller of the tag checks whether product information change is requested from the manager portable terminal 108 through communication with the manager portable terminal 108 (step 804).

When the product information change request is requested, the tag receives the product information from the administrator portable terminal 108 to change the stored product information and combines the changed product information and the tag identification information to generate the product information change information. In addition, the product information change information is transmitted in real time to the ESL server 100 through the tag manager 102 (steps 806 and 808).

The ESL server 100 receives the product information change information and provides it to the POS device 106, and the POS device 106 changes the product information of the corresponding tag in real time according to the product information change information (steps 810 and 812). ), It is reflected in the calculation of the product.

In addition, the forced wake-up tag checks whether a predetermined time elapses, and when the predetermined time elapses, sleeps the communication module (steps 814 and 816).

1 is a block diagram of an electronic shelf label tag system according to a preferred embodiment of the present invention.

2 is a block diagram of a tag manager according to a preferred embodiment of the present invention.

3 is a block diagram of a tag according to a preferred embodiment of the present invention.

4 to 8 are flowcharts of a tag control method according to a preferred embodiment of the present invention.

Claims (16)

  1. Electronic shelf label tag system,
    An electronic shelf label server for receiving and transmitting product information change period information from a mobile terminal for administrator or a point-of-sale device;
    Receive wake-up period setting information to set a wake-up period, receive time slot assignment information to set a time slot period, and when the set wake-up period is reached, wakes up the communication module and performs communication during the time slot period. A plurality of tags;
    Receiving the product information change period information from the electronic shelf label server to set the wake-up period corresponding to the product information change period information, and to each of the plurality of tags for communication with each of the plurality of tags during the wake-up period A time slot period assigned to a tag to communicate with when a time slot is allocated and a wake-up period setting information and a time slot assignment information are transmitted to each of the plurality of tags, and when communicating with any one of the plurality of tags A tag manager which detects a message and communicates with the time slot of the tag to communicate within the wake-up period.
    The tag has a reed switch driven by a magnet,
    The control unit of the tag generates an interrupt by the ON signal of the reed switch, and when the interrupt is generated, the control unit of the tag wakes up the communication module for a predetermined time period. system.
  2. The method of claim 1,
    The electronic shelf label server transmits the product information including the tag identification information to the tag manager for changing the product information,
    The tag manager transmits the product information to a tag corresponding to the tag identification information in a time slot period of a tag corresponding to the corresponding tag identification information.
    And the tag receives the product information from the tag manager during an allocated timeslot period in the wake-up period and changes previously stored product information.
  3. delete
  4. The method of claim 1,
    The electronic shelf label tag system further comprises a manager portable terminal for communicating with the tag,
    While the tag wakes up the communication module according to the interrupt by the reed switch, when the product information is received together with the product information change request from the administrator portable terminal,
    Change previously stored product information according to the received product information,
    Combining the received product information and its own tag identification information to generate product information change information, electronic shelf label tag system, characterized in that for transmitting the product information change information to the electronic shelf label server through the tag manager.
  5. The method of claim 1,
    Each of the tag and the tag manager,
    RTC (Real Time Clock) and binary counter
    Detecting the wake-up period based on an output value of the time information generating device;
    And detecting the timeslot period based on the output value of the binary counter.
  6. The method of claim 1,
    The tag manager transmits a synchronization signal for every communication with the plurality of tags,
    Wherein each of the plurality of tags controls synchronization according to a synchronization signal from the tag manager.
  7. In the tag of the electronic shelf label tag system,
    Communication module;
    A memory unit for storing product information;
    A display device for displaying the product information;
    A synchronization controller having a time information generating device and a counter, and controlling synchronization of the time information generating device and the counter according to a synchronization signal;
    Receiving the wake-up period setting information through the communication module, setting the wake-up period, receiving the time slot assignment information, and assigning the time slot period,
    A control unit which wakes up the communication module in the set wake-up period, and performs communication during the allocated timeslot period within the wake-up period; And
    And a lead switch that is turned on as the magnet is in proximity.
    And the control unit recognizes that the reed switch is turned on, as a forced wake-up interrupt, and wakes up the communication module for a predetermined time period.
  8. delete
  9. The method of claim 7, wherein
    When product information is received through the communication module,
    And the control unit changes the product information previously stored in the memory according to the received product information.
  10. The method of claim 7, wherein
    If product information is received from the administrator portable terminal through the communication module in the state in which the communication module wakes up according to the interrupt,
    The controller changes the product information previously stored in the memory according to the received product information,
    The tag of the electronic shelf label tag system, characterized in that the product information change information is generated by combining the changed product information and its identification information, and transmits the product information change information to the ESL server.
  11. In the tag control method of the electronic shelf label tag system,
    Receiving, by the electronic shelf label server, product information change period information from a manager portable terminal or a POS device and transmitting the received product information change period information to a tag manager;
    When the tag manager receives the product information change period information from the electronic shelf label server, the tag manager sets a wakeup period corresponding to the product information change period information, and provides a plurality of tags for communication with each of the plurality of tags during the wakeup period. Allocating timeslot periods for each of the tags and transmitting wakeup period setting information and timeslot allocation information to each of the plurality of tags;
    Receiving a wake-up period setting information from each of the plurality of tags, setting a wake-up period, and setting a time slot period according to the time slot assignment information;
    When the tag manager is requested to communicate with any one of the plurality of tags, the tag manager detects a time slot period of the communication requested tag within the wakeup period, and the time of the communication requested tag within the wakeup period. Communicating with the tag when a slot period occurs;
    And communicating with the tag manager during the timeslot period after each of the plurality of tags wakes up the communication module in the wakeup period.
    The tag has a reed switch driven by a magnet,
    The control unit of the tag generates an interrupt by an ON signal of the reed switch, and when the interrupt occurs, the control unit of the tag wakes up the communication module for a predetermined time period. Tag control method of tag system.
  12. The method of claim 11,
    When the electronic shelf label server transmits the product information including the tag identification information to the tag manager to change the product information,
    The tag manager transmits the product information to a tag corresponding to the tag identification information in a time slot period of a tag corresponding to the tag identification information.
    The tag control method of the electronic shelf label tag system, characterized in that for changing the pre-stored product information according to the received product information.
  13. delete
  14. The method of claim 11,
    After the tag wakes up according to the interrupt by the reed switch, if product information from the manager portable terminal is received,
    Change previously stored product information according to the received product information,
    Combining the received product information and its own tag identification information to generate product information change information, and transmits the product information change information to the electronic shelf label server through the tag manager,
    And the electronic shelf label server transmits the product information change information to the point of sale device.
  15. The method of claim 11,
    The tag and the tag manager includes a real time clock (RTC) and a binary counter, which is a time information generating device,
    Detecting the wake-up period based on an output value of the time information generating device;
    And detecting the timeslot period based on the output value of the binary counter.
  16. The method of claim 11,
    The tag manager,
    Send a synchronization signal every time the communication with the plurality of tags,
    And each of the plurality of tags controls synchronization according to a synchronization signal from the tag manager.
KR1020090110547A 2009-11-16 2009-11-16 Electronic shelf label tag system and tag thereof, tag control method KR101065640B1 (en)

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KR101124097B1 (en) * 2009-12-15 2012-03-22 삼성전기주식회사 Electronic shelf label system having wake-up function using magnetic field detection
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