SE542638C2 - Wireless display system - Google Patents

Abstract

To provide a wireless display system having excellent versatility and usability. A wireless display system (100) including: first wireless display apparatuses (20) for carrying out wireless communication with another device using an electromagnetic communication scheme and displaying the display data received; second wireless display apparatuses (30) for carrying out wireless communication with another device using an IrDA communication scheme and displaying the display data received; an administration server (40) for generating the display data; an access point (50) for transmitting the display data to the first wireless display apparatus (20) using the electromagnetic communication scheme; a transceiver (55) for transmitting the display data to the second wireless display apparatus (30) using the IrDA communication scheme; and a server storage unit (45) for storing the device ID of each first wireless display apparatus (20) and each second wireless display apparatus (30). The management server (40) determines whether to cause the access point (50) or the transceiver (55) to transmit the display data generated on the basis of the device ID stored in the server storage unit (45).

Description

DESCRIPTIONWIRELESS DISPLAY SYSTEMTECHNICAL FIELD The present invention relates to the Wireless display system.BACKGROUND ART In the prior art, there are known Wireless display systems provided With a dataadministration device for generating display data, and a plurality of Wireless displayapparatus for displaying the display data received by Wireless communication With the dataadministration device. For example, Patent Literature l (Japanese Laid-open PatentApplication No. 2007-182280) discloses a Wireless display system applied as a sortingsystem for conf1rming Whether sorting carried out manually has been performed Without errorin a delivery center, shipping center, or other distribution Warehouse. With Patent Literaturel, display data generated by a host computer (data administration device) is sent to a Wirelessdisplay apparatus by infrared communication (Wireless communication).

SUMMARY OF THE INVENTION There is a recent need to configure a system With a mixture of Wireless displayapparatuses having different communication schemes and to properly use each Wirelessdisplay apparatus in accordance With the installation environment or the like. For example,the appropriate Wireless display apparatus is selected in accordance With the installation areaand/or installation mode of the Wireless display apparatus in relation to the fact that Wirelesscommunication that uses infrared rays is readily affected by physical impediments andWireless communication that uses electromagnetic Waves is readily obstructed byelectromagnetic interference in the same frequency band.

There is also a need in an existing Wireless display system Which includes a Wirelessdisplay apparatus that carries out Wireless communication by a single communication schemeto newly add a Wireless display apparatus that carries out Wireless communication by adifferent communication scheme. An example is the case of adopting a novel Wirelessdisplay apparatus that uses a communication scheme that overcomes drawbacks and/or uses acommunication scheme Which is more suitable to an installation environment in comparisonWith the communication scheme of an existing Wireless display apparatus. In such a case,from the vieWpoint of minimizing or otherwise reducing investment costs, it is possible to consider operating the existing Wireless display apparatus and the novel Wireless display apparatus in a cooperative arrangement rather than replacing all of the existing Wireless display apparatuses With the novel Wireless display apparatuses.

However, in a conventional Wireless display system, the system is configured Withconsideration given solely to communication With a single communication scheme towardWireless display apparatuses; therefore, it is difficult to respond to these needs and versatilityis poor. Also, having the user specify the communication scheme in each instance thedisplay data is to be modified is a cumbersome, non-user-friendly process during operationafter the Wireless display apparatus has been installed.

In view of the above, an object of the present invention is to provide a Wirelessdisplay system With excellent usability and versatility.

A Wireless display system according to a first aspect of the present inventioncomprises first display apparatuses, second display apparatuses, a data administration device,first communication means, second communication means, and storage means. The firstdisplay apparatus configured and arranged to carry out Wireless communication Withanother device using a f1rst communication scheme. The first display apparatus configuredand arranged to display information on the basis of received display data. The seconddisplay apparatus configured and arranged to carry out Wireless communication Withanother device using a second communication scheme. The second display apparatusconfigured and arranged to display information on the basis of received display data.The data administration device configured and arranged to generate the display data to bedisplayed on the each first display apparatus and the each second display apparatus. Thef1rst communication means configured and arranged to transmit the display datagenerated by the data administration device to the first display apparatus using the firstcommunication scheme. The second communication means configured and arranged totransmit the display data generated by the data administration device to the second displayapparatus using the second communication scheme. The storage means configured andarranged to store identification information of the each first display apparatus and the eachsecond display apparatus. The data administration device deterrnines Whether to cause thef1rst communication means or the second communication means to transmit the display datagenerated on the basis of the identification information stored in the storage means.

The Wireless display system according to the first aspect of the present inventioncomprises the data administration device for generating display data to be displayed on theeach first display apparatus and second display apparatus, the first communication means for transmitting the display data to the first display apparatus by the f1rst communication scheme, and the second communication means for transmitting the display data to the second displayapparatus by the second communication scheme. It is thereby possible to easily constitute asystem With a configuration in Which Wireless display apparatuses having differentcommunication schemes are mixed together. As a result, a Wireless display apparatus thatuses a different communication scheme from that of the Wireless display apparatus operatedcurrently can be neWly added in a simple manner in an existing Wireless display system. Itis also possible to properly use each Wireless display apparatus in a simple manner inaccordance With the installation environment or the like. Accordingly, such a system hasexcellent versatility.

In the Wireless display system according to the first aspect of the present invention,the data administration device deterrnines Whether to cause the first communication means orthe second communication means to transmit the display data generated on the basis of theidentification information of the each first display apparatus and the each second displayapparatus stored in the storage means. Generated display data to be displayed by the firstdisplay apparatus is thereby automatically transmitted to the first display apparatus, andgenerated display data to be displayed by the second display apparatus is therebyautomatically transmitted to the second display apparatus. As a result, the user is able tooperate the system Without being particularly aWare of the communication scheme of theeach Wireless display apparatus. Accordingly, such a system has excellent usability.

A Wireless display system according to a second aspect of the present invention isthe Wireless display system according to the first aspect of the present invention, furthercomprising identification information transmission means. The identification informationtransmission means configured and arranged to read the identification information of theeach first display apparatus and the each second display apparatus. The identificationinformation transmission means configured and arranged to transmit the identificationinformation of the each first display apparatus and the each second display apparatus to thedata administration device. The each first display apparatus and the each second displayapparatus have an identification information holding section configured and arranged tohold the identification information for self-indicating. The identification informationtransmission means reads the identification information from the identification informationholding section. The data administration device receives the identification informationtransmitted from the identification information transmission means.

Due to this, the identification information of each display apparatus is no longer required to be directly inputted manually. Accordingly, such a system has even greater usability.

A wireless display system according to a third aspect of the present invention is thewireless display system according to the first or second aspect of the present invention,wherein the first communication scheme is a scheme using electromagnetic waves of apredeterrnined frequency band. The second communication scheme is a scheme usingelectromagnetic waves of a frequency band that is higher than that of the first communicationscheme.

It is thereby easily possible to constitute a wireless display system by mixing twotypes of display apparatuses that carry out electromagnetic communication oVerelectromagnetic waves in different frequency bands.

A wireless display system according to a fourth aspect of the present invention is thewireless display system according to the first or second aspect of the present invention,wherein the first communication scheme is a scheme using electromagnetic waves. Thesecond communication scheme is a scheme using infrared rays.

It is thereby easily possible to constitute a wireless display system by mixing thedisplay apparatus that carries out infrared communication and the display apparatus thatcarries out electromagnetic communication to constitute a wireless display system.

With the wireless display system according to the present inVention, it is therebypossible to easily constitute a system with a configuration in which wireless displayapparatuses having different communication schemes are mixed together. As a result, awireless display apparatus that uses a different communication scheme from that of thewireless display apparatus operated currently can be newly added in a simple manner in anexisting wireless display system. It is also possible to properly use each wireless displayapparatus in a simple manner in accordance with the installation environment or the like.Accordingly, such a system has excellent versatility.

Generated display data to be displayed by the first display apparatus is therebyautomatically transmitted to the first display apparatus, and generated display data to bedisplayed by the second display apparatus is thereby automatically transmitted to the seconddisplay apparatus. As a result, the user is able to operate the system without beingparticularly aware of the communication scheme of the each wireless display apparatus.Accordingly, such a system has excellent usability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. l is a schematic structural diagram of the wireless display system according to an embodiment of the present invention.

FIG. 2 is a front view of the external appearance of the wireless display apparatus.

FIG. 3 is a block diagram showing the schematic structure of the wireless displayapparatus.

FIG. 4 is a block diagram showing the schematic structure of the management server.

FIG. 5 is a schematic diagram of the display apparatus information table.

FIG. 6 is a schematic diagram of the display information table.

FIG. 7 is a flowchart showing an example of a flow of processing of the managementserver.

FIG. 8 is a sequence diagram schematically showing an example of the processingcarried out between each device in the wireless display system.

FIG. 9 is a front view of the extemal appearance of the wireless display apparatusaccording to modification example C.

FIG. l0 is a schematic structural diagram of the wireless display system according tomodif1cation example D.

DESCRIPTION OF EMBODIMENTS A wireless display system 100 according to an embodiment of the present inventionis described below with reference to the drawings. The following embodiment is a specificexample of the present invention and does not limit the technical scope of the presentinvention, it being possible for suitable modifications to be made in a range that does notdepart from the spirit of the invention. (l) Overall configuration of the wireless display system l00 FIG. l is a schematic structural diagram of the wireless display system l00according to an embodiment of the present invention.

The wireless display system 100 has an arrangement of a plurality of displayapparatuses (a plurality of wireless display apparatuses 10) in predeterrnined positionscorresponding to an object (articles and/or space related to information to be displayed), andindividually transmits display data from a management device (a management server 40) toeach display apparatus to thereby suitably display information related to the object toward aviewer.

In the present embodiment, the wireless display system 100 is applied to adistribution center l such as a delivery center and/or a shipping center. In the distribution center 1, many types of products P are stocked as inventory. The products P stocked as inventory are shipped, as appropriate, in accordance with orders in the distribution center l.

In the distribution center 1, stocking sections 2 are provided in a number thatcorresponds to the number of types of the products P. The stocking sections 2 areindividually correlated With a given type of product. A product shelf for accommodating theproducts P is arranged in the stocking sections 2, and the products P of the corresponded typeare accommodated on the product shelf.

A Wireless display apparatus 10 as a display apparatus for displaying inforrnationrelated to the product P is provided in each of the stocking sections 2. The Wireless displayapparatus 10 displays display data (i.e., product code, product name, inventory quantity,shipping date, order quantity, and delivery address, and the like) related to the product Paccommodated in the stocking section 2.

The Wireless display system 100 has a plurality of the Wireless display apparatuses10, the management server 40 (data administration device) for transmitting the display dataaddressed to the Wireless display apparatus 10, an access point 50 (first communicationmeans) and a transceiver 55 (second communication means) for relaying the display datatransmitted by the management server 40, and a handy terminal 60 used for acquiringidentification inforrnation (device ID) of each Wireless display apparatus 10.

In the Wireless display system 100, the display data to be displayed on each Wirelessdisplay apparatus 10 is generated in the management server 40. A communication networkNW1 is constructed by connecting the management server 40, and each of the access point 50and each of the transceiver 55 by a communication cable. (2) Detailed configuration of the Wireless display system 100 (2-1) Wireless display apparatus 10 (first Wireless display apparatus 20, secondWireless display apparatus 30) FIG. 2 is a front view of the extemal appearance of the Wireless display apparatus 10.FIG. 3 is a block diagram shoWing the schematic structure of the Wireless display apparatus10.

The Wireless display apparatus 10 is a device for displaying the display data receivedby Wireless communication. In the Wireless display system 100, a plurality of the Wirelessdisplay apparatuses 10 are installed, and the Wireless display apparatuses 10 are a firstWireless display apparatus 20 or a second Wireless display apparatus 30. Specifically, theWireless display system 100 has, as the Wireless display apparatuses 10, a plurality of the firstWireless display apparatuses 20 (first display apparatuses) and a plurality of the second Wireless display apparatuses 30 (second display apparatuses).

The first Wireless display apparatus 20 carries out Wireless communication With another device (the access point 50) by an electromagnetic communication scheme (firstcommunication scheme) using electromagnetic waves. The second wireless displayapparatus 30 carries out wireless communication with another device (the transceiver 55) byan IrDA communication scheme (second communication scheme) using infrared rays (IrDAis an abbreviation of Infrared Data Association and is the registered trademark).

The first wireless display apparatus 20 and the second wireless display apparatus 30have a display apparatus casing ll constituting an outer shell, an information display unit l2for displaying information, a power source unit l3 for supplying drive power, a displayapparatus control unit l4, and a display apparatus identification barcode l5. The firstwireless display apparatus 20 has a first display apparatus communication unit 2l as acommunication unit for communicating with other devices. The second wireless displayapparatus 30 has a second display apparatus communication unit 3l as a communication unitfor communicating with other devices. In other words, the first wireless display apparatus20 and the second wireless display apparatus 30 differ from each other in having the firstdisplay apparatus communication unit 2l or the second display apparatus communication unit3l as a communication unit. (2-l-l) Display apparatus casing ll The display apparatus casing ll is a thin, substantially rectangular parallelepiped-shaped case. A large opening is formed in the front surface (one of the main surfaces) of thedisplay apparatus casing ll, and the information display unit l2 (more specifically, the coverportion of the information display unit l2) is exposed to the exterior via the opening. (2-l-2) Inforrnation display unit l2 The information display unit l2 has electronic paper (not shown) in afluid electrowetting scheme, electrophoretic scheme, or the like. microencapsulated scheme, electron powder scheme, liquid-crystal scheme,The information display unit l2is electrically connected to the display apparatus control unit l4, and the operation of theelectronic paper is controlled by the display apparatus control unit l4. The informationdisplay unit l2 is supplied with a predeterrnined drive voltage from the display apparatuscontrol unit l4 and thereby displays the display data transmitted from the management server40. FIG. 2 shows a state in which a number "150429" indicating the product code, text"OO Candy" indicating the product name, a number "233" indicating the inventory quantity,a number "2015/5/ 18" indicating the shipping date, a number "l00" indicating the orderquantity, and text "AAStore" indicating shipping address are displayed as the display data on the information display unit l2. (2-1-3) Power source unit 13 The power source unit 13 supplies the drive power of the wireless display apparatus10. The power source unit 13 includes a lithium cell or other cells (not shown). (2-1-4) Display apparatus control unit 14 The display apparatus control unit 14 is a function unit for controlling the operationof the wireless display apparatus 10. The display apparatus control unit 14 has amicrocomputer containing a CPU and memory. The display apparatus control unit 14mainly includes a display apparatus storage unit 141 and a display control unit 142.

The display apparatus storage unit 141 is composed of RAM, ROM, flash memory,or other memory, and includes a plurality of storage areas. A program storage area M1 isincluded in the display apparatus storage unit 141. A control program in which theprocesses of the display apparatus control unit 14, communication protocols used incommunication with other devices, and/or the like are defined is saved in the program storagearea M1. An address storage area M2 is included in the display apparatus storage unit 141.The device ID assigned to the wireless display apparatus 10 is stored in the address storagearea M2. A received data storage area M3 is included in the display apparatus storage unit141. Received information (e.g., the display data transmitted from the management server40) is stored in the received data storage area M3.

The display control unit 142 controls the operation of the information display unit 12in accordance with the control program. The display control unit 142 acquires the displaydata (i.e., transmitted from the management server 40) stored in the received data storage areaM3. The display control unit 142 supplies a predeterrnined voltage to the informationdisplay unit 12 so that the acquired the display data is displayed on the information displayunit 12. (2-1-5) Display apparatus identification barcode 15 The display apparatus identification barcode 15 (identification information holdingsection) holds a code (identification information) for identifying whether the wireless displayapparatus 10 is the first wireless display apparatus 20 or the second wireless displayapparatus 30. The display apparatus identification barcode 15 is affixed in a position awayfrom the information display unit 12 on the front surface portion of the display apparatuscasing 11. (2-1-6) Communication units (first display apparatus communication unit 21, second display apparatus communication unit 31) The first display apparatus communication unit 21 performs wireless communication functions for carrying out Wireless communication With the access point 50 (morespecifically, communication With the management server 40 via the access point 50) usingelectromagnetic Waves in the first Wireless display apparatus 20. The first display apparatuscommunication unit 2l includes a communication circuit, baseband LSI, and antenna forcarrying out Wireless communication using electromagnetic Waves in the 2.4 GHz band.

The second display apparatus communication unit 31 performs Wirelesscommunication filnctions for carrying out Wireless communication With the transceiver 55(more specifically, communication With the management server 40 via the transceiver 55)using infrared rays (the IrDA communication scheme) in the second Wireless displayapparatus 30. The second display apparatus communication unit 3l includes acommunication circuit, a baseband LSI, and receiving unit for receiving infrared rays sentfrom the transceiver 55. (2-2) Management server 40 FIG. 4 is a block diagram showing the schematic structure of the management server40. The management server 40 is a computer for performing overall control of the operationof the Wireless display system l00. The management server 40 mainly has an input/outputunit 4l, a server communication unit 42, and a server control unit 43. (2-2-l) Input/output unit 4l The input/output unit 4l serves as an interface for taking command input from asystem administrator and displaying information to the system administrator. Theinput/output unit 4l includes a keyboard as an input unit and a liquid-crystal display as anoutput unit. (2-2-2) Server communication unit 42 The server communication unit 42 includes a communication circuit and basebandLSI for carrying out communication With the access point 50 (more specifically,communication With the first Wireless display apparatus 20 and the handy terminal 60 via theaccess point 50) and communication With the transceiver 55 (more specifically,communication With the second Wireless display apparatus 30 via the transceiver 55). Theserver communication unit 42 is electrically connected to the server control unit 43. (2-2-3) Server control unit 43The server control unit 43 is composed of a CPU, memory, and the like. The servercontrol unit 43 mainly includes a server storage unit 45, an output control unit 46, a table management unit 47, and a display data output control unit 48. (2-2-3-1) Server storage unit 45 The server storage unit 45 (storage means) is composed of RAM, ROM, flashmemory, or other memory, and includes a plurality of storage areas. Specifically, the serverstorage unit 45 includes a program storage area Ml0, a display apparatus information storagearea Ml l, and a display information storage area Ml2. (2-2-3-l-l) Program storage area Ml0 A control program in Which the processes of the server control unit 43,communication protocols used in communication With other devices, and/or the like aredefined are saved in the program storage area Ml0. (2-2-3-l-2) Display apparatus information storage area Mll The display apparatus information storage area Mll stores a display apparatusinformation table TBl that is used When the display data is transmitted to the Wireless displayapparatus 10.

FIG. 5 is a schematic diagram of the display apparatus information table TBl.Inforrnation related to the device ID of each Wireless display apparatus 10, thecommunication address of the relay destination When a signal is to be sent to each Wirelessdisplay apparatus 10 (i.e., the MAC address of the access point 50 or the transceiver 55), thecorresponding product P (product name) for each Wireless display apparatus 10, and theproduct code of the corresponding product P are correlated and recorded in the displayapparatus information table TBl.

In FIG. 5, the texts "Fl356", "R2l54", ..., and "R2552" in the display apparatusinformation table TBl are recorded in the columns indicating the device ID of the Wirelessdisplay apparatuses l0. The device ID having the initial "R" is given to the first Wirelessdisplay apparatus 20 and the device ID having the initial "F" is given to the second Wirelessdisplay apparatus 30. In other Words, the first Wireless display apparatus 20 is given thedevice ID having the initial "R", and the second Wireless display apparatus 30 is given thedevice ID having the initial "F". Because the device ID With a different format is given tothe first Wireless display apparatus 20 and the second Wireless display apparatus 30, and inthe Wireless display system 100, it is possible to identify the first Wireless display apparatus20, Which carries out communication by the electromagnetic communication scheme, and thesecond Wireless display apparatus 30, Which carries out communication by the IrDAcommunication scheme by referring to the device ID.

The texts "00-99-**-AA-**-Jl", "ll-99-**-BB-**-E2", ..., and "ll-99-**-BB-**-E4" are recorded in the columns indicating the communication address (relay destination address) of the relay destination When a signal is to be transmitted to each Wireless display apparatus 10.

The texts "OO Chocolate", "><>< Chocolate", ..., "OO Candy", ..., and "AACandy"are recorded in the columns indicating the corresponding product P of each Wireless displayapparatus 10.

The texts "l50426", "l50427", ..., "l50429", ..., and "l5043l" are recorded in thecolumns indicating the product code of the corresponding product P. The text "150426"indicates the product code for "OO Chocolate". The text "150427" indicates the productcode "><>< Chocolate" ..., "150429" indicates the product code for "OO Candy" ..., and"15043 l" indicates the product code for "AACandy". (2-2-3-1-3) Display inforrnation storage area Ml2 The display inforrnation table TB2 containing various inforrnation for generating thedisplay data to be transmitted to the Wireless display apparatus l0 is stored in the displayinforrnation storage area Ml2.

FIG. 6 is a schematic diagram of the display information table TB2. As shown inFIG. 6, various inforrnation (specifically, the product name, the product code, and theinventory quantity (the quantity stocked in the stocking section 2) of each product P, theshipping date, the order quantity, the shipping address, and remarks) is correlated andrecorded in the display inforrnation table TB2. For example, in the display inforrnationtable TB2 shoWn in FIG. 6, the text "OO Candy" is recorded in the columns for recording theproduct name, and the text "150429" indicating the product code, the text "233" indicatingthe inventory quantity, the text "2015/5/ 18" indicating the shipping date, the text "l00"indicating the order quantity, and the text "AA Store" indicating the shipping destination arerecording in correlation With the product in the "OO Candy" line. The display inforrnationtable TB2 is updated, as appropriate, by the system administrator via the input/output unit 4l. (2-2-3-2) Output control unit 46 The output control unit 46 generates data to be outputted to (displayed on) theinput/output unit 4l (liquid-crystal display) and outputs drive voltage. (2-2-3-3) Table management unit 47 When the device ID of the Wireless display apparatus 10 and the product code of thecorresponding product P are transmitted from the handy terminal 60, the table managementunit 47 receives these in the server communication unit 42, and updates the display apparatusinforrnation table TBl by correlating and recording the received device ID and the receivedproduct code of the corresponding product P. (2-2-3-4) Display data output control unit 48 11 The display data output control unit 48 generates the display data on the basis ofvarious information With reference to the display inforrnation table TB2 saved in the displayinforrnation storage area Ml2. The display data output control unit 48 addresses andtransmits the display data generated to the corresponding Wireless display apparatus 10. Indoing so, the display data output control unit 48 refers to the display apparatus inforrnationtable TBl saved in the display apparatus inforrnation storage area Ml l, and the display dataoutput control unit 48 deterrnines Whether having the access point 50 or the transceiver 55 totransmit the display data generated on the basis of the device ID of the Wireless displayapparatus l0 recorded in the display apparatus inforrnation table TBl. The display dataoutput control unit 48 also refers to the display apparatus inforrnation table TBl and acquiresthe communication address of the relay device (the access point 50 or the transceiver 55). (2-3) Access point 50 The access point 50 is a communication device for carrying out Wirelesscommunication With the first Wireless display apparatus 20 and the handy terminal 60 usingelectromagnetic Waves in the 2.4 GHz band. The access points 50 are mounted in intervalson e.g., the ceiling and/or sideWalls of the distribution center 1. The installation locationand/or spacing of the access points 50 are deterrnined, as appropriate, so as to allow the firstWireless display apparatus 20 installed in the distribution center l to communicate With anyof the access points 50.

The access point 50 transmits the display data sent from the management server 40to each of the first Wireless display apparatuses 20. In other Words, the access point 50corresponds to a device for relaying the display data and is an example of firstcommunication means for transmitting the display data related to the corresponding product Pto each of the first Wireless display apparatuses 20. (2-4) Transceiver 55 The transceiver 55 is a communication device for carrying out Wirelesscommunication in the IrDA communication scheme With the second Wireless displayapparatus 30 using infrared rays. The transceivers 55 are mounted in intervals on e.g., theceiling and/or sideWalls of the distribution center l. The installation location and/or spacingof the transceiver 55 are deterrnined, as appropriate, so as to allow the second Wirelessdisplay apparatus 30 installed in the distribution center l to communicate With any of thetransceivers 55.

The transceiver 55 transmits the display data sent from the management server 40 toeach of the second Wireless display apparatuses 30. In other Words, the transceiver 55 12 corresponds to a device for relaying the display data and is an example of secondcommunication means for transmitting the display data related to the corresponding product Pto each of the second wireless display apparatuses 30. (2-5) Handy terrninal 60 The handy terrninal 60 (identification inforrnation transmission means) is used inlinking work for correlating the device ID of the wireless display apparatus 10 and theproduct code of the product P or the like. The linking work is performed to correlate andregister the device ID of the wireless display apparatus 10 and the product code of theproduct P in the management server 40. The handy terrninal 60 is a portable data collectionterrninal. The handy terminal 60 is used by workers (employees or the like that work in thedistribution center 1).

The handy terrninal 60 includes a reader (not shown) for reading the displayapparatus identification barcode 15 of each wireless display apparatus 10 and identificationinformation (i.e., the device ID of each wireless display apparatus 10 and the product code ofeach product P) affixed to each product P. The handy terrninal 60 also includes a wirelesscommunication unit (not shown) capable of wireless communication with the access point 50.

The handy terrninal 60, in accordance with the operation of a Worker, reads thedevice ID by scanning the display apparatus identification barcode 15 of any of the wirelessdisplay apparatuses 10 and reads the product code by scanning the barcode of the product Pcorrelated with the wireless display apparatus 10, and then addresses the device ID and theproduct code thus read to the management server 40 and transmits the device ID and theproduct code to the access point 50. (3) Flow of management server 40 processing FIG. 7 is a flowchart showing an example of a flow of processing of the managementserver 40. The management server 40 executes, e.g., a process in a flow such as thefollowing. The following processing flow can be modified, as appropriate.

In step S101, when the management server 40 has received the device ID and theproduct code transmitted from the handy terrninal 60, the process proceeds to step S102. Ifthe management server 40 has not received the device ID and the product code, the processproceeds to step S103.

In step S102, the management server 40 creates or updates the display apparatusinformation table TB1 by correlating and recording the device ID received and the product code in the display apparatus information table TB1.

S103.

The process then proceeds to step 13 In step S103, When the management server 40 has an input signal due to beinginputted the command via the input/output unit 41, the process proceeds to step S104.When the management server 40 does not have the input signal, the process proceeds to stepS105.

In step S104, the management server 40 records or deletes information in the displayapparatus information table TB1 or the display information table TB2 by creating or updatingthe tables on the basis of the input signal. Thereafter, the process proceeds to step S105.

In step S105, the management server 40 generates, as appropriate, the display dataWith reference to the display information table TB2. Thereafter, the process proceeds to stepS106.

In step S106, the management server 40 refers to the display information table TB2and assesses on the basis of the device ID Whether the transmission destination of the displaydata to be transmitted is the first Wireless display apparatus 20, and When the transmissiondestination is the first Wireless display apparatus 20, the process proceeds to step S107.When the transmission destination of the display data to be transmitted is not the firstWireless display apparatus 20, the process proceeds to step S108.

In step S107, the management server 40 addresses to the first Wireless displayapparatus 20 and transmits the display data to be transmitted to the access point 50.Thereafter, the process retums to step S101.

In step S108, the management server 40 refers to the display information table TB2,and assesses on the basis of the device ID Whether the transmission destination of the displaydata to be transmitted is the second Wireless display apparatus 30, and When the transmissiondestination is the second Wireless display apparatus 30, the process proceeds to step S109.When the transmission destination of the display data to be transmitted is not the secondWireless display apparatus 30, the process retums to S101.

In step S109, the management server 40 addresses to the second Wireless displayapparatus 30 and transmits the display data to be transmitted to the transceiver 55.Thereafter, the process retums to step S101.

While activated, the management server 40 repeats the processing in accordanceWith the above-described flow. The management server 40 deterrnines Whether to transmitthe display data generated to the access point 50 or the transceiver 55 on the basis of thedevice ID of the Wireless display apparatus 10 stored in the display information table TB2, asshown in steps S106 to S109. (4) Operation of the Wireless display system 100 14 FIG. 8 is a sequence diagram schematically showing an example of the processingcarried out between the first wireless display apparatus 20, the second wireless displayapparatus 30, the management server 40, the access point 50, the transceiver 55, and thehandy terminal 60 in the wireless display system 100.

As shown in the upper section of FIG. 8, in the wireless display system 100, whenthe handy terminal 60 reads the device ID of the first wireless display apparatus 20 or thesecond wireless display apparatus 30, the device ID thus read is addressed together with theproduct code of the corresponding product P read to the management server 40 andtransmitted to the access point 50. The access point 50 relays and transmits the device IDreceived and the product code to the management server 40. The management server 40updates the display apparatus information table TB1 on the basis of the device ID and theproduct code received.

As shown in the lower section of FIG. 8, in the wireless display system 100, whenthe display information table TB2 has been updated by the system administrator, themanagement server 40 generates the display data in accordance with the display informationtable TB2. The management server 40 transmits to the access point 50 the display data thatis to be transmitted to the first wireless display apparatus 20 on the basis of the device IDreceived. The access point 50 transmits the display data received to the first wirelessdisplay apparatus 20. The first wireless display apparatus 20 displays the display datareceived.

The management server 40 transmits to the transceiver 55 the display data that is tobe transmitted to the second wireless display apparatus 30 on the basis of the device IDreceived. The transceiver 55 transmits the display data received to the second wirelessdisplay apparatus 30. The second wireless display apparatus 30 displays the display datareceived. (5) Features of the wireless display system 100 (5-1) The wireless display system 100 is provided with the management server 40 forgenerating the display data to be displayed on the first wireless display apparatuses 20 andthe second wireless display apparatuses 30, the access point 50 for transmitting the displaydata to the first wireless display apparatus 20 by the electromagnetic communication scheme(electromagnetic waves), and the transceiver 55 for transmitting the display data to thesecond wireless display apparatus 30 by the IrDA communication scheme (infrared rays). It is thereby possible to easily constitute a system with a configuration in which wireless display apparatuses 10 having different communication schemes are mixed together.Accordingly, the Wireless display system 100 has excellent versatility.

There is a recent need to configure a system With a mixture of Wireless displayapparatuses having different communication schemes and to properly use each Wirelessdisplay apparatus in accordance With the installation environment or the like. For example,the appropriate Wireless display apparatus is selected in accordance With the installation areaand/or installation mode of the Wireless display apparatus in relation to the fact that Wirelesscommunication that uses infrared rays is readily affected by physical impediments andWireless communication that uses electromagnetic Waves is readily obstructed byelectromagnetic interference in the same frequency band.

There is also a need in an existing Wireless display system Which includes a Wirelessdisplay apparatus that carries out Wireless communication by a single communication schemeto newly add a Wireless display apparatus that carries out Wireless communication by adifferent communication scheme. An example is the case of adopting a novel Wirelessdisplay apparatus that uses a communication scheme that overcomes drawbacks and/or uses acommunication scheme Which is more suitable to an installation environment in comparisonWith the communication scheme of an existing Wireless display apparatus. In such a case,from the viewpoint of reducing investment costs or the like, it is possible to consideroperating the existing Wireless display apparatus and the novel Wireless display apparatus in acooperative arrangement rather than replacing all of the existing Wireless display apparatusesWith the novel Wireless display apparatuses.

HoWever, in a conventional Wireless display system, the system is configured Withconsideration given to only communication With a single communication scheme toWardWireless display apparatuses, and it is therefore difficult to respond to these needs andversatility is poor.

In the Wireless display system 100, it is possible to obtain a configuration in Whichthe Wireless display apparatuses 10 having different communication schemes are mixedtogether to constitute a system in a simple configuration. As a result, the Wireless displayapparatus 10 that uses a different communication scheme from that of the Wireless displayapparatus 10 operated currently can be newly added in a simple manner in an existingWireless display system. It is also possible to properly use each Wireless display apparatus10 in a simple manner in accordance With the installation environment or the like.

Accordingly, the Wireless display system 100 has excellent versatility.(5-2) 16 In the Wireless display system 100, the management server 40 deterrnines Whether tocause the access point 50 or the transceiver 55 to transmit the display data generated on thebasis of the device ID of the first Wireless display apparatus 20 and the second Wirelessdisplay apparatus 30 stored in the server storage unit 45. Accordingly, the Wireless displaysystem l00 has excellent usability.

During operation after Wireless display apparatuses having different communicationschemes have been mixed together to constitute a system, having the user specify thecommunication scheme in each instance the display data is to be modified is a cumbersomeprocess and lacks usability.

In the Wireless display system l00, the display data generated to be displayed by thefirst Wireless display apparatus 20 is automatically transmitted to the first Wireless displayapparatus 20, and the display data generated to be displayed by the second Wireless displayapparatus 30 is automatically transmitted to the second Wireless display apparatus 30. As aresult, the user is able to operate the system Without being particularly aware of thecommunication scheme of each Wireless display apparatus l0. Accordingly, the Wirelessdisplay system l00 has excellent usability. (5-3) In the Wireless display system l00, each of the first Wireless display apparatuses 20and each of the second Wireless display apparatuses 30 has the display apparatusidentification barcode l5 for holding the device ID for self-indicating, and the handy terminal60 is configured so as to read the device ID from the display apparatus identification barcodel5 of each of the first Wireless display apparatuses 20 and each of the second Wireless displayapparatuses 30 and transmit the information to the management server 40. In the Wirelessdisplay system l00, the device ID of each Wireless display apparatus l0 is thereby no longerrequired to be directly inputted manually. Accordingly, the Wireless display system l00 haseven greater usability. (5-4) In the Wireless display system l00, the first Wireless display apparatus 20 isconfigured so as to carry out communication With another device (the access point 50) by thecommunication scheme that uses electromagnetic Waves (the electromagnetic communicationscheme) and display the display data received, and the second Wireless display apparatus 30is configured so as to carry out communication With another device (the transceiver 55) by the communication scheme that uses infrared rays (the IrDA communication scheme) and display the display data received. Thus, in the Wireless display system l00, Wireless display 17 apparatuses that carry out infrared communication display apparatuses that carry outelectromagnetic communication can be mixed together to constitute the system in a simpleconfiguration. (6) Modifications The Wireless display system 100 of the above-described embodiment can bemodified, as appropriate, as indicated in the following modifications. Each modificationcan be applied in combination With other modifications in a range that does not produceinconsistency. (6-1) Modification A In the above-described embodiment, the Wireless display system 100 is applied tothe distribution center 1 as a delivery center, a shipping center or the like. HoWever, theenvironment to Which the Wireless display system 100 may be applied is not necessarilylimited to the distribution center 1; examples of other applications include systems fordisplaying guidance in factories, medical facilities, commercial facilities, public facilities, oroffices.

In such cases, it is possible to configure the Wireless display apparatus 10 to displayinformation related to the Work as the content of each step, processing time or the like.Inforrnation related to outpatient or prescription Work as patient names, drug lists or the likemay be displayed on the Wireless display apparatus 10. It is also possible to displayinformation related to a user, position information on a map or the like, information related totime, information related to sequence, or other information on the Wireless display apparatus10. (6-2) Modification B In the embodiment described above, number of the first Wireless display apparatuses20 and the second Wireless display apparatuses 30 is not particularly limited, but in theWireless display system 100, the first Wireless display apparatus 20 and the second Wirelessdisplay apparatus 30 can each be arranged in a number suited to the installation environment. (6-3) Modification C In the embodiment described above, each Wireless display apparatus 10 has thedisplay apparatus identification barcode 15 as the identification information holding section,and the handy terminal 60 reads and transmits the display apparatus identification barcode 15to the management server 40.

HoWever, it is possible to arrange a communication module 16 for carrying out Wireless communication (e.g., Near Field Communication (NFC) and/or (radio frequency 18 identifier (RFID)) in lieu of the display apparatus identification barcode 15 in the manner ofwireless display apparatus 10a shown in FIG. 9. In such a case, it is possible to use aconfiguration in which a storage area for storing the device ID for self-indicating is providedto the display apparatus storage unit 141 and a corresponding communication module isarranged in the handy terrninal 60 to thereby allow communication between the handyterrninal 60 and each Wireless display apparatus 10, and so that the handy terrninal 60acquires the device ID from each wireless display apparatus 10 by wireless communication.

In such a case, the display apparatus storage unit 141 corresponds to "anidentification information holding section" for holding the device ID (identificationinformation). (6-4) Modification D In the embodiment described above, the first wireless display apparatus 20 displaysthe display data received by wireless communication with the access point 50 by theelectromagnetic communication scheme (first communication scheme) using electromagneticwaves in the 2.4 GHz band, and the second wireless display apparatus 30 displays the displaydata received by wireless communication with the transceiver 55 by the IrDA communicationscheme (second communication scheme) using infrared rays.

However, the wireless display system 100 may be configured in the manner ofwireless display system 100a shown in FIG. 10.

In the wireless display system 100a, a third wireless display apparatus 35 (seconddisplay apparatus) is arranged in lieu of the second wireless display apparatus 30. In thewireless display system 100a, a second access point 58 (second communication means) isarranged in lieu of the transceiver 55.

The third wireless display apparatus 35 is substantially the same as the first wirelessdisplay apparatus 20 except for having a third display apparatus communication unit (notshown) in lieu of the first display apparatus communication unit 21. The third displayapparatus communication unit perfornis wireless communication fiinctions for carrying outwireless communication with the second access point 58 (more specifically, communicationwith the management server 40 via the second access point 58) using electromagnetic wavesin the third wireless display apparatus 35. The third display apparatus communication unitincludes a wireless communication circuit, baseband LSI and antenna for carrying outwireless communication using electromagnetic waves in the 5 GHz band (i.e., electromagnetic waves of a frequency band that is higher than that of the first display apparatus communication unit 21). 19 The second access point 58 is a communication device for carrying out wirelesscommunication with the third Wireless display apparatus 35 using electromagnetic waves inthe 5 GHz band. Second access points 58 are mounted in intervals on, e.g., the ceilingand/or sidewalls of the distribution center l. The installation location and/or spacing of thesecond access point 58 are deterrnined, as appropriate, so as to allow the third wirelessdisplay apparatus 35 installed in the distribution center l to communicate with any of thesecond access points 58.

The second access point 58 transmits the display data sent from the managementserver 40 to each of the third wireless display apparatus 35. In other words, the secondaccess point 58 corresponds to a device for relaying the display data, and is an example ofsecond communication means for transmitting the display data related to the correspondingproduct P to each of the third wireless display apparatus 35.

The same effect as that of the wireless display system 100 is realized by the wirelessdisplay system 100a as well.

In other words, in the wireless display system 100a, it is possible to obtain aconfiguration in which the wireless display apparatuses l0 having different communicationschemes are mixed together to constitute a system in a simple configuration. As a result, thewireless display apparatus l0 that uses a different communication scheme from that of thewireless display apparatus 10 operated currently can be newly added in a simple manner in anexisting wireless display system. It is also possible to properly use each wireless displayapparatus l0 in a simple manner in accordance with the installation environment or the like.Accordingly, the wireless display system 100a has excellent versatility.

In the wireless display system 100a, it is deterrnined whether to cause the accesspoint 50 or the second access point 58 to transmit the display data generated by themanagement server 40 on the basis of the device ID of each of the first wireless displayapparatuses 20 and each of the third wireless display apparatus 35 stored in the server storageunit 45. The display data generated to be displayed by the first wireless display apparatus20 is automatically transmitted to the first wireless display apparatus 20, and the display datagenerated to be displayed by the third wireless display apparatus 35 is automaticallytransmitted to the third wireless display apparatus 35. As a result, the user is able to operatethe system without being particularly aware of the communication scheme of each wirelessdisplay apparatus 10. Accordingly, the wireless display system 100a has excellent usability.

Although not shown in the drawings, a plurality of transceivers 55 and second wireless display apparatuses 30 may be arranged in the wireless display system 100a. In other Words, the system may be conf1gured using three types of the Wireless displayapparatuses 10 that used different communication schemes. In such a case as Well, the sameeffects as the Wireless display system l00a are realized. (6-5) Modification E In the embodiment described above, the handy terminal 60 is conf1gured so as toread the device ID of each Wireless display apparatus 10, and transmit the device ID and theproduct code of the corresponding product P to the management server 40. HoWever, thehandy terminal 60 is not necessarily required; the system may be conf1gured Without thehandy terminal 60.

In such a case, the Wireless display apparatuses l0 may be configured to individuallytransmit the device ID for self-indicating to the management server 40 and the systemadministrator may register the product code or the like of the corresponding product P thatcorresponds to each Wireless display apparatus l0 in correlation With the device ID via theinput/output unit 4l. Also, the system administrator may individually input the device ID ofeach Wireless display apparatus l0 via the input/output unit 4l. (6-6) Modification F In the embodiment described above, the MAC address is used as the communicationaddress of the access point 50 and the transceiver 55. HoWever, the communication addressmade be modified, as appropriate, to another suitable address. For example, private IPaddress may be used as the communication address of the access point 50 or the transceiver55. (6-7) Modification G In the embodiment described above, the server control unit 43 is arranged inside themanagement server 40. HoWever, some or all of the components (specifically, the serverstorage unit 45, the output control unit 46, the table management unit 47, and the display dataoutput control unit 48) included in the server control unit 43 are not necessarily required to bearranged inside the management server 40, and may be arranged in a remote location oranother device connected by a communication network. (6-8) Modification H In the embodiment described above, the initial of the device ID is used in themanagement server 40 as information for deterrnining Whether to cause the access point 50 orthe transceiver 55 to transmit the display data generated (in other Words, to specify Whetherthe destination Wireless display apparatus l0 of the display data is the first Wireless displayapparatus 20 or the second Wireless display apparatus 30).

HoWever, the management 21 server 40 may make the deterrnination on the basis of other information.

For example, the management server 40 may be configured to determine Whether tocause the access point 50 or the transceiver 55 to transmit the display data generated usinganother portion of the device ID other than the initial (e.g., the last character or the like).Also, the management server 40 may also be configured to determine Whether to cause theaccess point 50 or the transceiver 55 to transmit the display data generated on the basis of theMAC address given to the Wireless display apparatus l0. (6-9) ModificationI In the embodiment described above, the first Wireless display apparatus 20 isconfigured to carry out Wireless communication With the access point 50 by theelectromagnetic communication scheme using electromagnetic Waves in the 2.4 GHz band.HoWever, in the first Wireless display apparatus 20, the electromagnetic Wave frequency usedWhen carrying out communication scheme With the access point 50 is not particularly limitedand may be modified, as appropriate. (6-l0) Modification J In the embodiment described above, the first Wireless display apparatus 20 isconfigured to carry out Wireless communication With the relay device (the access point 50)using the communication scheme that uses electromagnetic Waves, and the second Wirelessdisplay apparatus 30 is configured to carry out Wireless communication With the relay device(the transceiver 55) using the communication scheme that uses infrared rays. HoWever, theWireless communication fianction of the first Wireless display apparatus 20 or the secondWireless display apparatus 30 is not necessarily limited to communication that useselectromagnetic Waves or infrared rays; Wireless communication may be carried out usinganother communication scheme. For example, the first Wireless display apparatus 20 or thesecond Wireless display apparatus 30 may be configured to carry out communication With arelay device using light and/or sound Waves. In such cases, the same effects are realized asthose of the embodiment described above.(6-l l) Modification KIn the embodiment described above, the information display unit l2 has electronicpaper. HoWever, the information display unit l2 may have a liquid-crystal unit that includesliquid crystal and a liquid-crystal drive electrode section in lieu of the electronic paper. Insuch a case, the display apparatus control unit l4 may be configured so as to control the operation of the liquid-crystal unit.(6-l2) Modification L 22 In the embodiment described above, the Wireless display apparatus 10 carries outcommunication (receiving the display data) using the device ID for self-indicating.HoWever, no limitation is imposed thereby; the Wireless display apparatus l0 may beconfigured to carry out communication using MAC address for self-indicating and/or anothercommunication address (e.g., private IP address or the like). (6-l3) Modif1cation M In the embodiment described above, the management server 40 (the display dataoutput control unit 48) deterrnines Whether to cause the access point 50 or the transceiver 55to transmit the display data generated on the basis of the device ID of the Wireless displayapparatus l0 recorded in the display apparatus information table TBl. HoWever, nolimitation is imposed thereby; the management server 40 may determine Whether to cause theaccess point 50 or the transceiver 55 to transmit the display data generated on the basis ofother information (e. g., the MAC address of the Wireless display apparatus 10).INDUSTRIAL APPLICABILITY The present invention can be used in a Wireless display system.

REFERENCE SIGNS LISTl: Distribution center2: Stocking section l0: Wireless display apparatus ll: Display apparatus casing 12: Inforrnation display unit l3: Power source unit l4: Display apparatus control unit l5: Display apparatus identification barcode (identification information holding section)l6: Communication module : First Wireless display apparatus (first display apparatus) 2l: First display apparatus communication unit : Second Wireless display apparatus (second display apparatus) 3 l: Second display apparatus communication unit : Third Wireless display apparatus (second display apparatus) 40: Management server (data administration device)42: Server communication unit 43: Server control unit 45: Server storage unit 23 47: Table management unit 48: Display data output control unit 50: Access point (first communication means)55: Transceiver (second communication means)58: Second access point (second communication means)60: Handy terminal (identification information transmission means)100, 100a: Wireless display system 141: Display apparatus storage unit 142: Display control unit M1: Program storage area M10: Program storage area M11: Display apparatus information storage areaM12: Display information storage area M2: Address storage area M3: Received data storage area NW1: Communication network P: Product TB1: Display apparatus information table TB2: Display information table CITATION LIST PATENT LITERATURE Patent Literature 1: Japanese Patent Application Laid-open No. 2007-182280 24

Claims (3)

1. A Wireless display system (100, l00a) comprising:first display apparatuses (20) that have a first display apparatus communication unit (21) for carrying out Wireless communication With a data adniirtistfixtiot: :íevicaë (liífæiä anti/or a first c/omanianicfxtiosi, rnealïs (Sífr using a first communication scheme and display information on the basis of received display data;second display apparatuses (30, 35) that have a second display apparatuscommunication unit (3l) for carrying out Wireless communication With a (iaia aciminšstration desfitfe (éšíš) anti/or a second atoinniunicaiiort nieaiiss (55. p) ", ,. _ using a second communication scheme and display information on the basisof received display data; a data administration device (40) configured and arranged to generate the displaydata to be displayed on the each first display apparatus (20) and the each second displayapparatus (30, 35); first communication means (50) configured and arranged to transmit the displaydata generated by the data administration device (40) to the first display apparatus (20)using the first communication scheme; second communication means (55, 58) configured and arranged to transmit thedisplay data generated by the data administration device (40) to the second displayapparatus (3 0, 35) using the second communication scheme; and storage means (45) configured and arranged to store identification information ofthe each first display apparatus (20) and the each second display apparatus (30, 35); Wherein the first Wireless display apparatus (20) and the second Wireless displayapparatus (30, 35) differ from each other in having the first display apparatuscommunication unit (21) and the second display apparatus communication unit (3l)respectively; the data administration device (40) determining Whether to cause the firstcommunication means (50) or the second communication means (55, 58) to transmitthe display data generated on the basis of the identification information stored in thestorage means (45) in order to display the display data generated on the each first displayapparatus (20) and the each second display apparatus (30, 35); the first communication scheme is a scheme using electromagnetic Waves; and the second communication scheme is a scheme using infrared rays.

2. The Wireless display system according to claim 1, further comprising identification information transmission means (60) configured and arranged toread the identification information of the each first display apparatus (20) and the eachsecond display apparatus (30, 35) and to transmit the identification information of theeach first display apparatus (20) and the each second display apparatus (30, 35) to thedata administration device (40), the each first display apparatus (20) and the each second display apparatus havingan identification information holding section (15) configured and arranged to hold theidentification information for self-indicating, the identification information transmission means (60) reading the identificationinformation from the identification information holding section, and the data administration device (40) receiving the identification information transmitted from the identification information transmission means (60).

3. The Wireless display system according to claim 1 or 2, Wherein the first communication scheme is a scheme using electromagnetic Waves of apredetermined frequency band, and the second communication scheme is a scheme using electromagnetic Waves of a frequency band that is higher than that of the first communication scheme.