WO2014148272A1 - 電子棚札システム - Google Patents

電子棚札システム Download PDF

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Publication number
WO2014148272A1
WO2014148272A1 PCT/JP2014/055840 JP2014055840W WO2014148272A1 WO 2014148272 A1 WO2014148272 A1 WO 2014148272A1 JP 2014055840 W JP2014055840 W JP 2014055840W WO 2014148272 A1 WO2014148272 A1 WO 2014148272A1
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WO
WIPO (PCT)
Prior art keywords
electronic shelf
shelf label
unit
server
control unit
Prior art date
Application number
PCT/JP2014/055840
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
村田　修二
清水　健
洋一郎 安部
弘樹 北川
Original Assignee
株式会社イシダ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社イシダ filed Critical 株式会社イシダ
Publication of WO2014148272A1 publication Critical patent/WO2014148272A1/ja

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F5/00—Show stands, hangers, or shelves characterised by their constructional features
    • A47F5/0043—Show shelves
    • A47F5/0068—Shelf extensions, e.g. fixed on price rail
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
    • G07G1/00—Cash registers
    • G07G1/12—Cash registers electronically operated
    • G07G1/14—Systems including one or more distant stations co-operating with a central processing unit
    • G07G1/145—PLU-management
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/16—Use of wireless transmission of display information
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/04—Electronic labels

Definitions

  • the present invention relates to a radio wave type electronic shelf label system that exchanges information with a server via radio waves.
  • radio wave electronic shelf label systems have been employed (for example, Patent Document 1 (Japanese Patent Laid-Open No. 2001-148074)).
  • product information is transmitted by radio waves from a server that manages product information to electronic shelf labels installed at sales floors, etc., and the display contents of the electronic shelf label change based on the received product information Is done.
  • an operator such as an employee of a store displays a display of a specific electronic shelf label on a normal screen (display for a customer) at a sales floor where the electronic shelf label is installed. It may be necessary to switch from a screen) to a management screen (display screen used by an operator for product management) or to change information stored in a specific electronic shelf label. In such a case, an operator may operate the electronic shelf label at the sales floor where the electronic shelf label is installed using a portable radio remote controller.
  • radio waves are generally low in directivity, and other electronic shelf labels that are not subject to operation may be erroneously operated.
  • electronic shelf labels are often arranged close to each other at store sales floors, and such erroneous operations are likely to occur.
  • An object of the present invention is to provide an electronic shelf label system in which a server and an electronic shelf label communicate with each other by radio waves, so that an operator can operate the electronic shelf label at a place where the electronic shelf label is installed without operating it erroneously.
  • An object of the present invention is to provide an electronic shelf label system capable of operating only the target electronic shelf label.
  • the electronic shelf label system includes a plurality of electronic shelf labels, a server, a radio wave transmitter, and a portable transmitter.
  • the electronic shelf label is arranged corresponding to each of the plurality of products, and displays product information regarding the corresponding product.
  • the server stores product information.
  • the radio wave transmitter transmits product information stored in the server by radio waves toward a plurality of electronic shelf labels.
  • the portable transmitter transmits individual commands for individual electronic shelf labels by short-range wireless communication.
  • the electronic shelf label includes a first receiving unit, a second receiving unit, and a processing unit.
  • the first receiving unit receives product information transmitted from the radio wave transmitter.
  • the second receiving unit receives an individual command transmitted from the portable transmitter.
  • the processing unit executes processing according to the individual command.
  • the electronic shelf label can receive an individual command transmitted from a portable transmitter by near field communication (NFC). Therefore, it is easy for an operator to operate only the electronic shelf label to be operated without erroneously operating the electronic shelf label other than the operation target at a sales floor where the electronic shelf label is installed.
  • NFC near field communication
  • the second receiving unit has a memory for storing individual commands. It is desirable that the second receiving unit writes an individual command in the memory using power supplied from the portable transmitter to the second receiving unit by non-contact power transmission.
  • the electronic shelf label further includes a battery that supplies power to the processing unit. It is desirable that the second receiving unit further includes a unit control unit that controls the operation of the second receiving unit. It is desirable that the unit controller does not receive power from the battery.
  • the unit controller of the second receiving unit does not use the battery power. Therefore, compared with the case where a unit control part performs confirmation of the presence or absence of signal transmission from a portable transmitter using the electric power of a battery, the exchange frequency of the battery of an electronic shelf label can be controlled. As a result, the cost of battery replacement (the cost of the battery itself and the labor cost for battery replacement) can be suppressed.
  • the electronic shelf label further includes a battery that supplies power to the processing unit.
  • the second receiving unit preferably has a signal transmission unit that transmits a signal to the processing unit. It is desirable for the processing unit to have, as operation modes, a standby mode that minimizes power consumption and a startup mode that consumes more power than the standby mode.
  • the signal transmission unit preferably transmits a signal for switching the operation mode to the activation mode to the processing unit in the standby mode.
  • the operation mode of the processing unit is switched to the start mode after the second receiving unit receives the individual command. Therefore, the processing unit does not consume battery power because it waits for the input of an individual command from a portable transmitter that does not know when it will be transmitted. As a result, the battery replacement frequency of the electronic shelf label can be suppressed, and the battery replacement cost can be suppressed.
  • the second receiving unit is supplied with power from the portable transmitter by non-contact power transmission. It is desirable that the signal transmission unit transmits a signal to the processing unit using the power supplied from the portable transmitter.
  • the signal transmission unit of the second receiving unit does not consume battery power for signal transmission to the processing unit, the frequency of replacement of the battery of the electronic shelf label can be suppressed, and the cost of battery replacement can be suppressed. it can.
  • the communicable distance between the second receiving unit and the portable transmitter is 10 cm or less.
  • the electronic shelf label can receive an individual command transmitted from the portable transmitter by short-range wireless communication. Therefore, it is easy for an operator to operate only the electronic shelf label to be operated without erroneously operating the electronic shelf label other than the operation target at a sales floor where the electronic shelf label is installed.
  • FIG. 1 It is a figure which shows the electronic shelf label system which concerns on one Embodiment of this invention. It is a figure which shows the example of arrangement
  • FIG. 1 It is a figure which shows the external appearance of the electronic shelf label with which the electronic shelf label system which concerns on FIG. 1 is provided.
  • FIG. 1 It is a block diagram which shows schematic structure of the electronic shelf label with which the electronic shelf label system which concerns on FIG. 1 is provided.
  • a configuration connected by a solid line indicates that the components are electrically connected.
  • a configuration connected to the control unit by a broken line indicates that driving power is supplied from the battery.
  • the electronic shelf label system 1 according to the present embodiment is merely an example of the embodiment of the present invention, and the electronic shelf label system according to the present invention is not limited to the contents described below. Other modes can be adopted as long as they do not contradict the gist of the invention.
  • the electronic shelf label system 1 is used in stores such as supermarkets and convenience stores.
  • the electronic shelf label system 1 mainly includes a plurality of electronic shelf labels 40, 40,..., An electronic shelf label server 10, and a plurality of access points 30, 30,.
  • a remote controller 50 and a handy terminal 80 are included.
  • the numbers of electronic shelf labels 40, access points 30, remote controllers 50, and handy terminals 80 included in the electronic shelf label system 1 are not limited to the numbers shown in FIG.
  • the electronic shelf label 40 is a portable device and is a display device arranged corresponding to each of a plurality of products P handled in the store.
  • the electronic shelf label 40 is arranged in the vicinity of the corresponding product P among the plurality of types of products P displayed on the store floor of the store, and displays product information regarding the corresponding product P (see FIG. 2).
  • the merchandise information is various information related to the merchandise P, and includes, for example, a normal sale price, a special sale price, a discount rate, a sales quantity, an inventory quantity, etc. of the merchandise P.
  • the electronic shelf label server 10 is a computer that comprehensively controls the electronic shelf label system 1.
  • the functions of the electronic shelf label server 10 include management of product information displayed on the electronic shelf label 40.
  • the product information is stored in the server storage unit 14 of the electronic shelf label server 10 as will be described later.
  • the electronic shelf label server 10 transmits distribution data including product information to the electronic shelf label 40 via the access point 30.
  • the electronic shelf label server 10 transmits the product information to the electronic shelf label 40 as image data (image data displayed on the display unit 41 of the electronic shelf label 40 described later). It is not limited to.
  • the electronic shelf label server 10 may transmit product information such as a normal selling price as numerical data to the electronic shelf label 40.
  • the access point 30 is a radio wave transmitter / receiver.
  • the access point 30 exchanges various signals with the electronic shelf label 40 using radio waves.
  • the access points 30 are attached to a ceiling in a store, for example, with a certain interval.
  • the installation location, installation interval, and the like of the access point 30 are determined so that the electronic shelf label 40 installed in the store can communicate with any access point 30.
  • the access point 30 is connected to the electronic shelf label server 10 via a network 2 such as a LAN (Local Area Network).
  • a network 2 such as a LAN (Local Area Network).
  • the access point 30 transmits distribution data (distribution data including product information) transmitted from the electronic shelf label server 10 to the access point 30 via the network 2 to the plurality of electronic shelf labels 40 by radio waves. That is, the access point 30 is an example of a radio wave transmitter. Further, the access point 30 receives a signal transmitted from the electronic shelf label 40 and transmits the received signal to the electronic shelf label server 10 via the network 2.
  • the remote controller 50 is a portable transceiver.
  • the remote controller 50 exchanges various signals with each electronic shelf label 40 using near field communication (NFC).
  • NFC near field communication
  • the short-range wireless communication here means communication at a distance of several centimeters to several tens of centimeters.
  • the remote controller 50 transmits an individual command for the individual electronic shelf label 40 by short-range wireless communication using an electromagnetic field. That is, the remote controller 50 is an example of a portable transmitter.
  • the handy terminal 80 is configured to be able to read identification information such as a barcode attached to the electronic shelf label 40 or the product P, and is a portable information terminal mainly used for information collection. .
  • the handy terminal 80 is mainly used for linking the device ID of the electronic shelf label 40 and the product ID of the product P. The link work will be described later.
  • the electronic shelf label 40 is arranged corresponding to each of the plurality of products P handled in the store, and displays product information regarding the corresponding product P (see FIG. 2). ). For example, on the electronic shelf label 40, the product name, the unit price per weight, and the sales price of the product P are displayed as product information (see FIG. 3).
  • the electronic shelf label 40 mainly includes a display unit 41, a control unit 42, a storage unit 43, a battery 44, a first communication unit 60, and a second communication unit 70.
  • the display unit 41 is a screen for displaying product information stored in the storage unit 43 described later (see FIG. 3).
  • Electronic paper is used for the display unit 41. That is, the display unit 41 is a dot matrix non-volatile display unit including a plurality of pixels arranged in a matrix.
  • the display unit 41 can hold the display content even when power is not supplied.
  • the display unit 41 is not limited to electronic paper, and for example, a liquid crystal display may be used.
  • the screen displayed on the display unit 41 includes a normal screen and a management screen.
  • the normal screen is a screen for customers, and the display unit 41 displays, for example, the product name, the unit price per weight, and the sales price of the product P as product information (see FIG. 3).
  • the management screen is a screen used by a store clerk or the like for product management, and the display unit 41 displays, for example, the number of sales, the number of orders, and the number of inventory of the product P as product information.
  • the operator operates the electronic shelf label 40 with the remote controller 50 at the site where the electronic shelf label 40 is installed (by transmitting an individual command from the remote controller 50 to the second communication unit 70).
  • the display of the unit 41 can be switched from the normal screen to the management screen.
  • the control unit 42 is an example of a processing unit.
  • the control unit 42 is mainly configured by a CPU.
  • the control part 42 is electrically connected to the display part 41, the memory
  • the control unit 42 receives supply of driving power from the battery 44 (see the broken line in FIG. 4).
  • the control unit 42 controls each unit of the electronic shelf label 40 by executing a program stored in the storage unit 43 described later.
  • the control unit 42 controls the display unit 41 such that product information (image data) received from the electronic shelf label server 10 by the first communication unit 60 described later is displayed on the display unit 41.
  • the control unit 42 controls the operations of the display unit 41, the storage unit 43, and the first communication unit 60 in order to execute processing according to an individual command received by the second communication unit 70 described later.
  • the individual command is a command transmitted to the individual electronic shelf label 40 from the remote controller 50 described later.
  • the individual command includes, for example, a command for switching the display on the display unit 41 from the normal screen to the management screen.
  • the individual command includes a command for controlling the first communication unit 60 so that the distribution data transmitted from the access point 30 can be received.
  • the control unit 42 has a sleep mode (standby mode) and a wake-up mode (startup mode) as operation modes.
  • the sleep mode is a mode in which the power consumption of the electronic shelf label 40 is minimized (consumption of the battery 44 is minimized).
  • the control unit 42 controls the display unit 41, the storage unit 43, the first communication unit 60, and the memory 73 of the second communication unit 70 so that power is not supplied from the battery 44. Therefore, in the sleep mode, it is impossible to update the display of the display unit 41, switch the display of the display unit 41 from the normal screen to the management screen, or receive the radio wave by the first communication unit 60.
  • the control unit 42 controls the battery 44 to supply power to the display unit 41, the storage unit 43, the first communication unit 60, and the memory 73 as necessary. For this reason, the power consumption of the electronic shelf label 40 in the wake-up mode is larger than the power consumption of the electronic shelf label 40 in the sleep mode.
  • the operation mode of the controller 42 is long in the sleep mode in order to suppress the consumption of the battery 44 (the ratio of the time in which the operation mode is the sleep mode is high). Then, when one of the following two conditions is satisfied, the operation mode of the control unit 42 is switched from the sleep mode to the wake-up mode.
  • the first condition is that a predetermined standby time elapses after the operation mode is switched to the sleep mode.
  • the first condition is that the control unit 42 having a timer function determines that a predetermined standby time has elapsed since the operation mode was switched to the sleep mode.
  • the waiting time is, for example, 1 minute, but is not limited to this. However, if the control unit 42 frequently shifts to the wake-up mode, the battery 44 is likely to be exhausted, so that the reaction time for transmission of product information from the electronic shelf label server 10 is acceptable for the user of the electronic shelf label system 1. It is desirable that the waiting time is as long as possible.
  • the reaction time for the transmission of product information from the electronic shelf label server 10 means the time from when the electronic shelf label server 10 transmits the product information until the content is reflected on the display of the display unit 41. To do.
  • the radio wave receiving unit of the electronic shelf label In order for the electronic shelf label to receive the radio waves of the remote controller, the radio wave receiving unit of the electronic shelf label must be pre- To be up). In other words, when a radio remote control is used, in order for the electronic shelf label to receive the remote control radio, the operation mode of the control unit of the electronic shelf label needs to be switched to the wake-up mode in advance. .
  • the waiting time of the worker becomes long and the work efficiency is poor. Therefore, the waiting time needs to be set to a short time (for example, 1 second). There is.
  • the operation mode of the control unit 42 is switched from the sleep mode to the wake-up mode. Then, the control unit 42 controls the first communication unit 60 to be supplied with driving power from the battery 44, and controls the first communication unit 60 to be able to receive distribution data transmitted from the access point 30. To do.
  • the control unit 42 determines whether the received distribution data is distribution data transmitted to itself (transmitted to the electronic shelf label 40). Determine whether or not.
  • the control unit 42 When it is determined that the received distribution data is distribution data transmitted to itself, the control unit 42 continues to execute necessary processing. Specifically, for example, the control unit 42 causes the first communication unit 60 to transmit a signal (ACK signal) indicating that the distribution data transmitted to itself is received to the access point 30. Control. Further, for example, the control unit 42 writes the product information (image data) included in the distribution data transmitted to itself into the storage unit 43 (performs an update process of the product information stored in the storage unit 43). . For example, the control unit 42 controls the display unit 41 so that the display content of the display unit 41 is changed to the product information written in the storage unit 43. When the necessary processing is completed, the operation mode of the control unit 42 is switched to the sleep mode.
  • the control unit 42 When it is determined that the received distribution data is not distribution data transmitted to itself, or when the first communication unit 60 does not receive the distribution data within a predetermined time, the control unit 42 The operation mode is switched to the sleep mode.
  • the control unit 42 determines whether or not the distribution data received by the first communication unit 60 has been transmitted to itself as follows.
  • the distribution data transmitted from the electronic shelf label server 10 via the access point 30 includes product information and an identifier.
  • the identifier is a device ID (a unique ID assigned to each electronic shelf label 40) of the electronic shelf label 40 that is the transmission target of the product information.
  • the control unit 42 compares the identifier included in the signal received by the first communication unit 60 with its own device ID stored in the storage unit 43 which will be described later. It is determined that the distribution data is transmitted.
  • the second condition (second condition) in which the operation mode of the control unit 42 is switched from the sleep mode to the wake-up mode is to control an interrupt signal transmitted by the unit control unit 72 of the second communication unit 70 described later.
  • the part 42 is receiving.
  • the operation mode of the control unit 42 is switched from the sleep mode to the wake-up mode.
  • the control unit 42 reads out an individual command stored in a memory 73 of the second communication unit 70 described later, and executes a process according to the individual command.
  • the storage unit 43 is a storage unit configured by a nonvolatile memory such as an EEPROM.
  • a volatile memory such as a RAM may be used for the storage unit 43.
  • the storage unit 43 is preferably a non-volatile memory.
  • the storage unit 43 in addition to a program for the control unit 42 to control each part of the electronic shelf label 40, a device ID that is a unique identifier of the electronic shelf label 40, and a product transmitted from the electronic shelf label server 10 Information (image data) is stored.
  • the product information includes product information for the normal screen and product information for the management screen.
  • the battery 44 supplies driving power to the display unit 41 of the electronic shelf label 40, the control unit 42, the storage unit 43, the first communication unit 60, and the memory 73 of the second communication unit 70 described later. Supply (see broken line in FIG. 4).
  • the second communication unit 70 uses the power supplied from the remote controller 50, the second communication unit 70 does not receive power from the battery 44 except for the memory 73.
  • the unit controller 72 and the antenna 71 of the second communication unit 70 to be described later are not supplied with power from the battery 44.
  • a memory 73 of the second communication unit 70 to be described later can receive power supply from both the battery 44 and the remote controller 50.
  • the display unit 41, the storage unit 43, the first communication unit 60, and the memory 73 of the second communication unit 70 are provided with switches (not shown) such as FETs.
  • the control unit 42 controls the power supply to the display unit 41, the storage unit 43, the first communication unit 60, and the memory 73 by controlling these switches.
  • control unit 42 turns off the above-described switch to turn off the display unit 41 and the storage unit 43. Control is performed so that power is not supplied from the battery 44 to the first communication unit 60 and the memory 73.
  • the first communication unit 60 is an example of a first receiving unit.
  • the first communication unit 60 receives distribution data (including distribution data for which another electronic shelf label 40 is to be transmitted) transmitted by radio waves from the access point 30. Further, when the first communication unit 60 receives the distribution data transmitted to itself (the distribution data received by the first communication unit 60 is controlled to be distribution data transmitted to itself).
  • the unit 42 determines), according to the instruction of the control unit 42, a signal (ACK signal) indicating that the distribution data transmitted to itself is received is transmitted to the access point 30 by radio waves.
  • the second communication unit 70 receives an individual command transmitted from the remote controller 50.
  • the second communication unit 70 is an example of a second receiving unit.
  • the second communication unit 70 is a passive RF tag. That is, the second communication unit 70 is an RF tag that receives power supply from the remote controller 50 by non-contact power transmission. The second communication unit 70 does not receive power supply from the battery 44 except for the memory 73 described later.
  • the second communication unit 70 is an electromagnetic induction type RF tag, but is not limited to this, and for example, a radio wave type RF tag may be used. As shown in FIG. 4, the second communication unit 70 mainly includes an antenna 71, a unit control unit 72, and a memory 73.
  • the antenna 71 is a loop antenna (coil antenna) used for electromagnetic wave transmission / reception.
  • the communicable distance between the second communication unit 70 and the remote controller 50 is 10 cm or less here.
  • the communicable distance is not limited to this, but when the electronic shelf labels 40 are arranged close to each other (for example, two electronic shelf labels 40 depicted on the upper right in FIG. 2) It is desirable that the communicable distance be 10 cm or less so that the remote controller 50 does not mistakenly operate the electronic shelf label 40 that is not a communication target.
  • the unit control unit 72 is an RF communication chip that controls the second communication unit 70 in response to an individual command from the remote controller 50.
  • the unit controller 72 executes various processes using the power supplied from the remote controller 50 to the second communication unit 70 by non-contact power transmission.
  • the unit controller 72 when the unit controller 72 receives an individual command from the remote controller 50 via the antenna 71, the unit controller 72 receives the received individual command using the power supplied from the remote controller 50 to the second communication unit 70 by non-contact power transmission. Is written in the memory 73.
  • the unit controller 72 uses the power supplied from the remote controller 50 to the second communication unit 70 by non-contact power transmission.
  • An interrupt signal is transmitted to 42. That is, the unit control unit 72 is an example of a signal transmission unit.
  • the interrupt signal is a signal for notifying the control unit 42 that the second communication unit 70 has received the individual command from the remote controller 50.
  • the control unit 42 reads out the individual command (the individual command transmitted from the remote controller 50) stored in the memory 73. Thereafter, the control unit 42 executes processing according to the individual command read from the memory 73.
  • control unit 42 When the control unit 42 is in the sleep mode and the control unit 42 receives an interrupt signal from the unit control unit 72, the operation mode of the control unit 42 is first switched to the wake-up mode, and then the control The unit 42 reads the individual command and executes the read individual command.
  • the unit control unit 72 reads out the information stored in the memory 73 and sends the read information to the remote controller 50. Send to.
  • the memory 73 is configured by a nonvolatile memory such as an EEPROM.
  • the memory 73 can receive power supply from both the battery 44 and the remote controller 50.
  • the memory 73 In the memory 73, an individual command received from the remote controller 50 by the unit controller 72 via the antenna 71 is written.
  • the memory 73 stores, for example, the device ID of the electronic shelf label.
  • the device ID stored in the memory 73 is the same information as the device ID stored in the storage unit 43.
  • the electronic shelf label server 10 is a computer that comprehensively manages the electronic shelf label system 1.
  • the electronic shelf label server 10 transmits various commands and various information to the electronic shelf label 40 via the access point 30.
  • the information transmitted from the electronic shelf label server 10 to the electronic shelf label 40 includes product information.
  • the electronic shelf label server 10 is disposed in a store backyard or the like.
  • the electronic shelf label server 10 includes a server communication unit 11, a server display unit 12, a server input unit 13, a server storage unit 14, and a server control unit 15 as main functional units (see FIG. 5).
  • the server communication unit 11 is a communication interface for enabling communication between the electronic shelf label server 10, the access point 30, the handy terminal 80, and the like.
  • the server communication unit 11 is also configured to be able to communicate with devices outside the electronic shelf label system 1 (for example, a POS system server and store controller installed in the store together with the electronic shelf label system 1).
  • the distribution data sent from the server communication unit 11 to the access point 30 is further transmitted by radio waves from the access point 30 to the electronic shelf label 40.
  • the server display unit 12 is a liquid crystal display. Various information related to the electronic shelf label system 1 can be displayed on the server display unit 12.
  • the server input unit 13 is a mouse and a keyboard. A user of the electronic shelf label system 1 can input various commands and various information to the electronic shelf label server 10 via the server input unit 13.
  • the server storage unit 14 includes a ROM, a RAM, a hard disk, and the like.
  • the server storage unit 14 stores various programs executed by the server control unit 15 described later.
  • Various information is stored in the server storage unit 14.
  • the information stored in the server storage unit 14 includes a product master table 14a and an electronic shelf label master table 14b (see FIG. 5).
  • the product master table 14a stores information (product information) related to products handled by the electronic shelf label system 1.
  • the product information is various information about the product P. For example, the product name, price (normal sales price, special sales price), unit price (normal sales price / special sales price), discount rate, sales volume, inventory of the product P Including quantity.
  • product information is stored for each product ID (barcode information of the product P).
  • the contents of the merchandise master table 14a are obtained when the server communication unit 11 receives information from an external device (for example, a POS system (not shown) installed in the store) or the server input unit 13 accepts input of information. It is updated with.
  • an external device for example, a POS system (not shown) installed in the store
  • the server input unit 13 accepts input of information. It is updated with.
  • the link work is carried out as follows.
  • the worker displays a device ID of the electronic shelf label 40 (the same device ID stored in the storage unit 43 and the memory 73 of the electronic shelf label 40) attached to one electronic shelf label 40.
  • the code 40a (see FIG. 3) is scanned by the reader of the handy terminal 80.
  • the worker scans the barcode attached to the product P on which the electronic shelf label 40 displays the product information with the reader of the handy terminal 80.
  • the scanned device ID and product ID are transmitted to the electronic shelf label server 10 via a communication line (not shown) (for example, a wireless LAN).
  • the server control unit 15 to be described later links the transmitted device ID of the electronic shelf label 40 and the product ID of the product P, and stores them in the electronic shelf label master table 14b.
  • the server control unit 15 performs various controls based on programs and various information stored in the server storage unit 14.
  • the server control unit 15 stores the information in the electronic shelf label master.
  • the table 14b is linked and stored.
  • the server control unit 15 transmits product information to the electronic shelf label 40 via the access point 30 when the electronic shelf label system 1 is activated or when the display change of the electronic shelf label 40 is necessary.
  • the display change of the electronic shelf label 40 for example, when the contents of the product master table 14a are updated, or when the price is changed from the normal selling price to the special selling price during the sale period of the product P, At the end of the special sale period for the product P, the price is changed from the special sale price to the normal sale price.
  • the server control unit 15 performs the following processing when transmitting the product information to the electronic shelf label 40.
  • the server control unit 15 refers to the product master table 14a, and generates product information (image data) to be transmitted to the electronic shelf label 40 for the product P that requires the display change of the electronic shelf label 40. Further, the server control unit 15 refers to the electronic shelf label master table 14b, and acquires, as an identifier, the device ID of the electronic shelf label 40 that is linked to the product P that requires the display change of the electronic shelf label 40. .
  • the server control unit 15 generates distribution data including the generated screen information and the acquired identifier (device ID of the electronic shelf label 40 to be transmitted).
  • the distribution data is data obtained by combining a header including an identifier and product information.
  • the server control unit 15 transmits the generated distribution data to the access point 30.
  • the access point 30 that has received the distribution data transmits the distribution data to the electronic shelf label 40 by radio waves.
  • the access point 30 waits until the first communication unit 60 of the electronic shelf label 40 enters the wake-up mode, and then transmits the distribution data.
  • the electronic shelf label 40 when receiving the distribution data for itself, transmits an ACK signal to the access point 30 by radio waves.
  • the access point 30 that has received the ACK signal from the electronic shelf label 40 transmits the ACK signal to the server communication unit 11 of the electronic shelf label server 10 via the network 2.
  • the server control unit 15 determines that the communication with the electronic shelf label 40 is successful, and ends the transmission process of the product information for the electronic shelf label 40.
  • the server control unit 15 retransmits the distribution data. To do.
  • the remote controller 50 is an RF tag reader / writer that reads and writes information of the second communication unit 70 of the electronic shelf label 40. As described above, the remote controller 50 exchanges various signals with each second communication unit 70 using near field communication (NFC). The remote controller 50 and the second communication unit 70 communicate using an electromagnetic field.
  • NFC near field communication
  • the worker or the like causes the electronic shelf label 40 to execute various processes by transmitting individual commands to the second communication unit 70 using the remote controller 50.
  • the individual command includes a command for switching the display on the display unit 41 of the electronic shelf label 40 from the normal screen to the management screen, or from the management screen to the normal screen. Further, for example, in the individual command, the electronic shelf label 40 is caused to transmit a signal requesting the update of the product information to the electronic shelf label server 10 (via the access point 30). Includes instructions for receiving the latest product information.
  • FIG. 6 is a flowchart for explaining the operation of the control unit 42 of the electronic shelf label 40.
  • the control unit 42 operates when the operation mode of the control unit 42 of the electronic shelf label 40 is in the sleep mode (in the state of step S0 in FIG. 6) will be described.
  • step S ⁇ b> 1 the control unit 42 determines whether an interrupt signal has been received from the unit control unit 72 of the second communication unit 70. If an interrupt signal is received, the process proceeds to step S11. If no interrupt signal is received, the process proceeds to step S2.
  • step S2 the control unit 42 determines whether or not a predetermined standby time has elapsed after the operation mode is switched to the sleep mode. If it is determined that the standby time has elapsed, the process proceeds to step S3. If it is determined that the standby time has not elapsed, the process returns to step S1.
  • step S3 the operation mode of the control unit 42 is switched to the wake-up mode. Thereafter, the process proceeds to step S4.
  • step S4 the control unit 42 controls the first communication unit 60 to be supplied with driving power from the battery 44, and controls the first communication unit 60 to be able to receive radio waves from the access point 30. .
  • step S5 the control unit 42 determines whether or not the first communication unit 60 has received the distribution data transmitted by the access point 30. If it is determined that the distribution data has been received, the process proceeds to step S6. If it is determined that the distribution data has not been received, the process proceeds to step S10.
  • step S ⁇ b> 6 the control unit 42 compares the identifier of the distribution data received by the first communication unit 60 with its own device ID stored in the storage unit 43, thereby receiving the first communication unit 60. It is determined whether or not the distribution data is distribution data addressed to itself. Specifically, if the identifier of the distribution data received by the first communication unit 60 matches the own device ID stored in the storage unit 43, the control unit 42 determines that the distribution data is addressed to itself. If they do not match, it is determined that the distribution data is not addressed to itself.
  • step S7 the control unit 42 switches the operation mode to the sleep mode (returns to step S0).
  • step S7 the control unit 42 controls the first communication unit 60 to transmit an ACK signal to the access point 30. Thereafter, the process proceeds to step S8.
  • step S8 the control unit 42 stores the product information included in the distribution data received by the first communication unit 60 in the storage unit 43 (updates the product information stored in the storage unit 43).
  • step S9 the control unit 42 causes the display unit 41 to display the updated product information (image data).
  • the display unit 41 normally displays a normal screen (when the second communication unit 70 has not received an individual command for switching the display of the display unit 41 from the normal screen to the management screen). . Therefore, when only the product information (image data) related to the management screen is updated in step S8, step S9 may not be performed.
  • step S9 ends, the control unit 42 switches the operation mode to the sleep mode (returns to step S0).
  • step S10 when it is determined in step S5 that the distribution data has not been received, the control unit 42 controls the first communication unit 60 so that the distribution data can be received. (That is, after performing step S4), it is determined whether or not a predetermined time has elapsed. If it is determined in step S10 that the predetermined time has not elapsed, the process returns to step S5. On the other hand, when it is determined in step S10 that the predetermined time has elapsed, the control unit 42 switches the operation mode to the sleep mode (returns to step S0).
  • step S1 when it is determined in step S1 that the control unit 42 has received the interrupt signal, the operation mode of the control unit 42 is switched to the wake-up mode in step S11. Thereafter, the process proceeds to step S12.
  • step S12 the control unit 42 reads the individual command from the memory 73 of the second communication unit 70. Thereafter, the process proceeds to step S13.
  • step S13 the control unit 42 performs a process according to the individual command read in step S12.
  • the control unit 42 reads the product information (image data) for the management screen from the storage unit 43 and displays it.
  • the unit 41 controls to display the read product information.
  • the control unit 42 switches the operation mode to the sleep mode (returns to step S0).
  • step S13 is not limited to the above contents.
  • the control unit 42 may further switch the operation mode to the sleep mode after further executing a process of switching the management screen to the normal screen.
  • the control unit 42 causes the first communication unit 60 to transmit a signal requesting the update of the product information to the electronic shelf label server 10 according to the individual command, and further causes the first communication unit 60 to The latest product information may be received from the electronic shelf label server 10.
  • the link work is a work for associating (linking) the electronic shelf labels 40 with the products P for which the respective electronic shelf labels 40 display product information. Specifically, this is an operation for associating the device ID of the electronic shelf label 40 with the product ID of the product P for which each electronic shelf label 40 displays product information.
  • the link work is a work required when, for example, displaying a new product on the sales floor.
  • step S101 the worker causes the handy terminal 80 to read the barcode 40a indicating the device ID of the electronic shelf label 40 attached to the electronic shelf label 40. Thereafter, the process proceeds to step S102.
  • step S102 the worker causes the handy terminal 80 to read the barcode (product ID) attached to the product P to be associated with the electronic shelf label 40 whose device ID has been read in step S101. Thereafter, the process proceeds to step S103.
  • step S103 the handy terminal 80 associates the device ID of the electronic shelf label 40 and the electronic shelf label 40 with the server communication unit 11 of the electronic shelf label server 10 via a communication line (not shown) (for example, wireless LAN).
  • a communication line for example, wireless LAN.
  • the product ID of the product P to be sent is transmitted. Thereafter, the process proceeds to step S104.
  • step S101 to step S103 is an illustration, and is not limited to this.
  • the electronic shelf label system 1 may be designed so that the order in which step S101 and step S102 are performed is reversed. Further, for example, instead of transmitting the device ID and the product ID at the same time in step S103, the transmission of the device ID and the product ID may be executed when each reading is performed.
  • step S ⁇ b> 104 the server control unit 15 of the electronic shelf label server 10 links the device ID of the electronic shelf label 40 received by the server communication unit 11 and the product ID of the product P to link the electronic shelf of the server storage unit 14. It is stored in the bill master table 14b. Thereafter, the process proceeds to step S105.
  • step S105 the server control unit 15 refers to the product master table 14a in the server storage unit 14 and stores product information (image data) for the product P having the product ID received in step S104 to the electronic shelf label 40. ) Is generated. Thereafter, the process proceeds to step S106.
  • step S106 the server control unit 15 refers to the electronic shelf label master table 14b of the server storage unit 14, and the device of the electronic shelf label 40 linked to the product P that requires the display change of the electronic shelf label 40.
  • ID that is, the device ID received in step S104
  • the process proceeds to step S107.
  • step S105 and step S106 do not need to be performed in this order, and the execution order may be reversed. Moreover, step S105 and step S106 may be performed simultaneously.
  • step S107 the server control unit 15 generates distribution data including the product information generated in step S105 and the identifier acquired in step S106. Thereafter, the process proceeds to step S108.
  • step S108 the server control unit 15 controls the server communication unit 11 to transmit the generated distribution data to the access point 30.
  • step S109 the access point 30 that has received the distribution data transmits the distribution data to the electronic shelf label 40 by radio waves.
  • step 110 the first communication unit 60 of the electronic shelf label 40 receives the distribution data transmitted by the access point 30. Thereafter, the process proceeds to step S111.
  • the operation mode of the control unit 42 of the electronic shelf label 40 (the electronic shelf label 40 attached with the device ID acquired in step S101) that is the transmission target of the distribution data is always set to the wake-up mode as described above. There is no reason. Therefore, in order to avoid a situation where the access point 30 cannot communicate with the electronic shelf label 40, the access point 30 waits until the first communication unit 60 of the electronic shelf label 40 enters the wake-up mode, and then transmits the distribution data.
  • step S111 the control unit 42 controls the first communication unit 60 and transmits an ACK signal to the access point 30. Thereafter, the process proceeds to step S112.
  • step S112 the control unit 42 writes the product information included in the distribution data received by the first communication unit 60 in the storage unit 43 (updates the product information stored in the storage unit 43). Thereafter, the process proceeds to step S113.
  • step S113 the control unit 42 causes the display unit 41 to display the updated product information (image data). In this way, the product information to be displayed by the electronic shelf label 40 is displayed on the display unit 41 of the electronic shelf label 40.
  • the electronic shelf label system 1 includes a plurality of electronic shelf labels 40, an electronic shelf label server 10, an access point 30 as a radio wave transmitter, and a remote controller 50 as a portable transmitter.
  • the electronic shelf label 40 is arranged corresponding to each of the plurality of products P, and displays product information regarding the corresponding product P.
  • the electronic shelf label server 10 stores product information.
  • the access point 30 transmits the product information stored in the electronic shelf label server 10 to the plurality of electronic shelf labels 40 by radio waves.
  • the remote controller 50 transmits an individual command for the individual electronic shelf label 40 by short-range wireless communication.
  • the electronic shelf label 40 includes a first communication unit 60, a second communication unit 70, and a control unit 42.
  • the first communication unit 60 receives product information transmitted from the access point 30.
  • Second communication unit 70 receives an individual command transmitted from remote controller 50.
  • the control part 42 performs the process according to an individual command.
  • the electronic shelf label 40 can receive an individual command transmitted from the remote controller 50 by short-range wireless communication. Therefore, it is easy for an operator to operate only the electronic shelf label 40 to be operated without erroneously operating the electronic shelf label 40 other than the operation target at a sales floor where the electronic shelf label 40 is installed.
  • the second communication unit 70 includes a memory 73 that stores individual commands.
  • the second communication unit 70 writes an individual command in the memory 73 using the power supplied from the remote controller 50 to the second communication unit 70 by non-contact power transmission.
  • the writing of the individual command to the memory 73 of the second communication unit 70 of the electronic shelf label 40 is executed by the power supplied from the remote controller 50, the power consumption of the electronic shelf label 40 can be suppressed.
  • the electronic shelf label 40 includes a battery 44 that supplies power to the control unit 42.
  • the second communication unit 70 has a unit controller 72 that controls the operation of the second communication unit 70.
  • the unit controller 72 does not receive power from the battery 44.
  • the unit controller 72 of the second communication unit 70 does not use the power of the battery. Further, the second communication unit 70 does not receive power supply from the battery 44 except for the memory 73. Therefore, the frequency of replacement of the battery 44 of the electronic shelf label 40 can be suppressed as compared with the case where the second communication unit 70 performs confirmation of the presence or absence of signal transmission from the remote controller 50 using the power of the battery 44. As a result, the cost of battery replacement (the cost of the battery 44 itself and the labor cost for battery replacement) can be suppressed.
  • the unit control unit 72 is an example of a signal transmission unit that transmits a signal to the control unit 42.
  • the control unit 42 has a sleep mode (standby mode) that minimizes power consumption and a wake-up mode (startup mode) that consumes more power than the sleep mode as operation modes.
  • the unit control unit 72 transmits an interrupt signal for switching the operation mode to the wake-up mode to the control unit 42 in the sleep mode.
  • the operation mode of the control unit 42 is switched to the wake-up mode. Therefore, the control unit 42 does not consume the power of the battery 44 because it waits for an input of an individual command from the remote controller 50, which does not know when it will be transmitted. As a result, the replacement frequency of the battery 44 of the electronic shelf label 40 can be suppressed, and the cost of battery replacement can be suppressed.
  • the second communication unit 70 is supplied with power from the remote controller 50 by non-contact power transmission.
  • the unit controller 72 transmits a signal to the controller 42 using the power supplied from the remote controller 50.
  • the unit controller 72 of the second communication unit 70 does not consume the power of the battery 44 for signal transmission to the controller 42, the replacement frequency of the battery 44 of the electronic shelf label 40 can be suppressed, Battery replacement costs can be reduced.
  • the communicable distance between the second communication unit 70 and the remote controller 50 is 10 cm or less.
  • the link operation between the electronic shelf label 40 and the product P is performed by using the handy terminal 80 with the barcode 40a indicating the device ID of the electronic shelf label 40 and the product ID of the product P.
  • the present invention is not limited to this.
  • a configuration like the electronic shelf label system 201 shown below may be used.
  • the handy terminal 280 of the electronic shelf label system 201 shown in FIG. 8 has an RF tag reader / writer function.
  • the handy terminal 280 acquires the device ID of the electronic shelf label 40 by communicating with the second communication unit 70 of the electronic shelf label 40.
  • the link operation is performed according to the flowchart shown in FIG. 9 instead of the flowchart shown in FIG.
  • step S201 the worker sends a device ID transmission command to the handy terminal 280 to the electronic shelf label 40 (to the second communication unit 70 of the electronic shelf label 40) and the activation of the first communication unit 60.
  • Commands are transmitted as individual commands. That is, the handy terminal 280 is an example of a portable transmitter.
  • step S202 the unit controller 72 of the second communication unit 70 that has received the individual command writes the activation command for the first communication unit 60 into the memory 73 using the power supplied from the handy terminal 280. Further, the unit control unit 72 transmits an interrupt signal to the control unit 42 using the power supplied from the handy terminal 280. Further, the unit control unit 72 transmits the device ID stored in the memory 73 toward the handy terminal 280 in response to a device ID transmission command. The handy terminal 280 receives the device ID transmitted from the second communication unit 70.
  • step S203 the control unit 42 that has received the interrupt signal in step S202 changes the operation mode to the wake-up mode and reads the individual command (start command for the first communication unit 60) stored in the memory 73. . Further, the control unit 42 executes the read individual command (start command for the first communication unit 60).
  • the start command for the first communication unit 60 is a command for shortening the cycle (standby time) in which the operation mode of the control unit 42 is changed from the sleep mode to the wake-up mode. For example, normally, the standby time in the sleep mode is set to 1 minute. However, when the activation command for the first communication unit 60 is executed, the standby time is 1 second. As a result, the first communication unit 60 can prepare for transmission of product information from the access point 30.
  • step S204 the operator causes the handy terminal 280 to read the product ID such as a barcode attached to the product P to be associated with the electronic shelf label 40 that has transmitted the individual command in step S201.
  • step S205 the handy terminal 280 sends the device ID of the electronic shelf label 40 acquired in step S202 to the server communication unit 11 of the electronic shelf label server 10 via the communication line (not shown) (for example, wireless LAN) and the electronic The product ID of the product P desired to be associated with the shelf label 40 (the product ID acquired in step S204) is transmitted. Thereafter, the process proceeds to step S206.
  • the communication line not shown
  • the process proceeds to step S206.
  • step S201 to step S205 is an illustration, and is not limited to this.
  • the electronic shelf label system 201 may be designed so that step S204 is performed first.
  • the device ID and the product ID may be transmitted when they are acquired.
  • step S206 the server control unit 15 of the electronic shelf label server 10 links the device ID of the electronic shelf label 40 received by the server communication unit 11 with the product ID of the product P, and the server storage unit 14 Are stored in the electronic shelf label master table 14b. Thereafter, the process proceeds to step S207.
  • step S207 the server control unit 15 refers to the product master table 14a in the server storage unit 14 and stores product information (image data) for the product P having the product ID received in step S206 to the electronic shelf label 40. ) Is generated. Thereafter, the process proceeds to step S208.
  • step S208 the server control unit 15 refers to the electronic shelf label master table 14b of the server storage unit 14, and the device of the electronic shelf label 40 linked to the product P that requires the display change of the electronic shelf label 40 is performed. ID (that is, the device ID received in step S206) is acquired as an identifier. Thereafter, the process proceeds to step S209.
  • step S207 and step S208 do not need to be performed in this order, and the execution order may be reversed. Step S207 and step S208 may be performed simultaneously.
  • Steps S209 to S215 are the same as steps S107 to S113 in FIG.
  • step S203 the cycle (standby time) in which the operation mode of the control unit 42 becomes the wake-up mode is shortened.
  • the control unit 42 can prepare for the transmission of the merchandise information from the access point 30 and can receive the distribution data from the electronic shelf label server 10 in a short time.
  • step S301 the operator causes the handy terminal 280 to read a product ID such as a barcode attached to the product P. Thereafter, the process proceeds to step S302.
  • step S302 the worker causes the handy terminal 280 to transmit the activation command for the first communication unit 60 and the transmission command for the link request to the second communication unit 70 of the electronic shelf label 40 as individual commands.
  • the handy terminal 280 transmits the product ID read in step S301 to the second communication unit 70 together with the individual command.
  • the link request is a request transmitted from the electronic shelf label 40 to the electronic shelf label server 10, and the device ID of the electronic shelf label 40 that transmits the link request to the electronic shelf label server 10 and a certain product P Are linked to the product ID (the product ID transmitted to the second communication unit 70 in step S302), and further, the product information of the product P is requested to be transmitted.
  • step S303 the unit control unit 72 of the second communication unit 70 that has received the individual command uses the power supplied from the handy terminal 280 to execute the individual command (start command for the first communication unit 60 and transmission command for the link request). ) And the product ID received together with the individual command are written in the memory 73. Further, the unit control unit 72 transmits an interrupt signal to the control unit 42 using the power supplied from the handy terminal 280.
  • step S304 the control unit 42 that has received the interrupt signal in step S303 changes the operation mode to the wake-up mode, reads the individual command stored in the memory 73, and executes the content. That is, the control unit 42 shortens a cycle (standby time) in which the operation mode of the control unit 42 becomes the wake-up mode from the sleep mode. Further, the control unit 42 controls the first communication unit 60 to request a link request to the electronic shelf label server 10 together with the device ID stored in the storage unit 43 and the product ID stored in the memory 73. Send.
  • step S305 the server control unit 15 of the electronic shelf label server 10 links the device ID of the electronic shelf label 40 received via the access point 30 with the product ID of the product P, and the server storage unit 14 electronic shelf label master table 14b. Thereafter, the process proceeds to step S306.
  • step S306 to step S314 are the same as step S207 to step S215 in FIG.
  • step S304 Even when the link work is executed according to the flowchart of FIG. 10, in step S304, the cycle (standby time) in which the operation mode of the control unit 42 is changed from the sleep mode to the wake-up mode is shortened. Therefore, when distribution data is transmitted from the access point 30 in step S310, the first communication unit 60 can receive the distribution data in a short time. Therefore, in the electronic shelf label system 201, it is possible to improve the responsiveness of the electronic shelf label 40 at the time of link work compared to the electronic shelf label system 1.
  • the time for the access point 30 to transmit the distribution data may also be a short time (for example, 1 second).
  • the handy terminal 280 does not need to communicate with the electronic shelf label server 10 during the link work. Therefore, a communication line for enabling communication between the handy terminal 280 and the electronic shelf label server 10 becomes unnecessary.
  • the electronic shelf label 40 receives radio waves transmitted from the access point 30 and communicates with the remote controller 50 by short-range wireless communication, but is not limited to this.
  • the electronic shelf label may be provided with an infrared transmitter / receiver capable of receiving radio waves transmitted from an access point and communicating with an infrared remote controller.
  • Infrared is more directional than radio waves, so in an electronic shelf label system that communicates with access points using radio waves, an operator misoperates an electronic shelf label other than the operation target at the location where the electronic shelf label is installed. Without operation, it is possible to operate only the electronic shelf label to be operated.
  • the power consumption of the electronic shelf label can be reduced compared to the case where the remote control and the electronic shelf label communicate with each other by radio waves.
  • An electronic shelf label system is an electronic shelf label system in which a server and an electronic shelf label communicate with each other by radio waves.
  • An operator erroneously operates an electronic shelf label other than an operation target at an installation location of the electronic shelf label. Therefore, the present invention is useful as an electronic shelf label system that can operate only the electronic shelf label to be operated.
  • Electronic shelf label system 10 Electronic shelf label server (server) 30 access point (radio wave transmitter) 40 Electronic shelf label 42 Control unit (processing unit) 44 Battery 50 Remote control (portable transmitter) 60 First communication unit (first receiving unit) 70 Second communication unit (second receiving unit) 72 Unit controller (signal transmitter) 73 Memory 280 Handy terminal (portable transmitter) P product

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