JP2010140387A - Image display system, image display device and network connection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display system, an image display device and a network connection method, for wirelessly connecting an unspecified large number of information processors to a specific image display device with easy operation, and ensuring security. <P>SOLUTION: In the image display system, a projector 1 includes: a storage part 19 storing a communication identifier 14 for specifying an apparatus and a user identifier 15 comprising a code string having a digit number smaller than the communication identifier 14; and an identification image generation part 16 generating an identifier display image. By connecting a USB memory 4 storing network setting information including the communication identifier 14 and the user identifier 15, and a wireless manager 42 for connecting to a wireless network 3 to a personal computer 2, the wireless manager 42 is started, an identifier input screen for inputting the user identifier 15 is displayed, and the user inputs the same user identifier 15 as the identifier display image displayed on a screen to establish network connection to the projector 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display system, an image display apparatus, and a network connection method, and more particularly, an image display apparatus such as a liquid crystal projector and an information processing apparatus such as a personal computer (hereinafter referred to as “personal computer”) via a wireless LAN. It is related with the technology which connects easily.

  Projection-type image (video) display devices such as liquid crystal projectors (hereinafter also simply referred to as “projectors”) are information processing devices for meetings, etc., in offices, etc., in addition to applications for enjoying movies such as movies at home. It is often used for applications such as displaying a presentation image or the like from a notebook computer by connecting to a notebook computer (hereinafter also simply referred to as “computer”).

  When connecting to a projector in a conference room by bringing a notebook computer or the like, it is cumbersome to connect with a cable. Therefore, a wireless communication module for connecting a personal computer and the projector with a wireless LAN such as IEEE802.11. On-board projectors are becoming popular.

  There are an unspecified number of personal computers to be connected, and there are often a plurality of projectors. When connecting wirelessly, it is necessary to set the communication identifier of the projector to be connected to the personal computer to be connected. Since the identifier for communication of the projector uses a MAC address or the like, it is a code string with a large number of digits, and connection may not be possible if the connection cannot be established due to a code setting error or if the identifier itself is not understood. .

  Therefore, for example, a method shown in Patent Document 1 has been proposed as a method for simplifying the setting for wireless connection. Patent Document 1 relates to a simple connection method for specifying one of a plurality of projectors and connecting to a personal computer that wants to transmit an image.

  Each of the plurality of projectors automatically generates an identifier for the user that is different from the identifier for communication. The identifier in this case is a simple identifier such as a color or a graphic that can be easily identified by the user, and is projected as an image on each screen.

  Next, each projector transmits a set of a user identifier and a communication identifier (such as a MAC address unique to the device) to the personal computer by broadcast (simultaneous broadcast).

  On the personal computer side that has received the broadcast, the address of the above set is stored, and a list of identifiers for the user is displayed on the screen of its own liquid crystal display or the like. The user looks at the user identifier (color, etc.) projected by the projector to be connected, and selects the same display identifier as the projector identifier from the list on the screen.

Thus, the communication identifier of the projector to be connected is selected, the communication partner can be specified, and the image can be transmitted to the projector to be connected.
JP-A-2005-99351

  However, the method of Patent Document 1 requires time and effort to install in advance a software for displaying a user identifier on a personal computer screen. On the other hand, from the viewpoint of information security, software installed on a personal computer used in a company may be strictly limited.

  Further, when a personal computer brought by a visitor is to be connected to the projector, a complicated operation for installing the software occurs every time, and there may be a situation that hinders the progress of the conference.

  The present invention has been made in view of the above, and an image display system and an image display device that can wirelessly connect an unspecified number of information processing devices to a specific image display device with a simple operation and ensure security. It is another object of the present invention to provide a network connection method.

  In order to achieve the above-described object, an image display system of the present invention transmits an image data from an information processing apparatus to which a nonvolatile memory can be attached via a wireless network and displays the image data on an image display unit of the image display apparatus. In the display system, the image display device includes communication means for connecting to a wireless network, identifier storage means for storing a communication identifier for specifying the image display device in the wireless network, and the number of digits from the communication identifier. An image generation means for generating an identifier display image including a user identifier consisting of a small number of code strings, and the information processing apparatus connects the display means, a communication means for connecting to a wireless network, and a nonvolatile memory A non-volatile memory, network setting information including a communication identifier and a user identifier, and wireless Connecting software for connecting to the network, and by connecting the nonvolatile memory to the external connection terminal, the user starts the connecting software and inputs the user identifier to the display means. The identifier input screen is displayed, and the user inputs the same user identifier as the identifier display image displayed on the image display unit of the image display device to the identifier input screen, so that communication corresponding to the user identifier is performed. Control means for reading out the identifier for use from the non-volatile memory and controlling the network connection with the image display device.

  With such a configuration, it is not necessary to input a code string having a large number of digits such as a MAC address in order to connect the information processing apparatus to the image display apparatus via a network. Further, the user identifier can be input while viewing the user identifier displayed on the image display unit. Therefore, network connection is definitely possible quickly. In addition, since the network connection software is activated simply by connecting the non-volatile memory to the information processing apparatus, it is not necessary to install extra software in advance in the information processing apparatus, and security can be ensured. A personal computer brought by a visitor or the like can be easily connected to a desired image display device simply by connecting a nonvolatile memory.

  In the image display system of the present invention, the user identifier may be stored in advance in the image display device.

  With such a configuration, when displaying the identifier display image on the image display unit, the image display device need only read the user identifier from the memory or the like, and does not need to generate the user identifier from the communication identifier. It becomes.

  In the image display system of the present invention, the image display device may further include an identifier conversion unit, and the identifier conversion unit may generate the user identifier based on the communication identifier.

  With such a configuration, when the image display device displays the identifier display image on the image display unit, the user identifier is generated from the communication identifier, so the image display device stores the user identifier in advance. There is no need.

  In the image display system of the present invention, the network setting information stored in the nonvolatile memory may include only a communication identifier and a user identifier corresponding to the image display device.

  With such a configuration, the input operation of the user identifier in the information processing apparatus can be omitted, so that the network connection becomes easier.

  In the image display system of the present invention, the non-volatile memory further stores an identifier input image having substantially the same format as the identifier display image generated by the image generating means, and the control means stores the identifier input image from the non-volatile memory. May be read out and displayed on the display means as an identifier input screen.

  With such a configuration, the user can intuitively grasp the identifier to be input, which makes the input operation easy to understand and easy to operate.

  In the image display system of the present invention, the nonvolatile memory may be a USB memory.

  In the image display system of the present invention, the image display device may be a projection type image display device, and the image display unit may be a screen.

  An image display apparatus according to the present invention is an image display apparatus that receives image data from an information processing apparatus via a wireless network and displays the image data on an image display unit, a communication means for connecting to the wireless network, and a wireless network An identifier storage means for storing a communication identifier for identifying the image display device, and an image generation means for generating an identifier display image including a user identifier consisting of a code string having a smaller number of digits than the communication identifier. The identifier display image is displayed on the image display unit.

  In the image display device of the present invention, the user identifier may be stored in advance in the identifier storage means.

  The image display apparatus of the present invention may further include an identifier conversion unit, and the identifier conversion unit may generate the user identifier based on the communication identifier.

  In the image display device of the present invention, the image display device may be a projection type image display device, and the image display unit may be a screen.

  A network connection method according to the present invention is a network connection method in an image display system that transmits image data from an information processing apparatus that can be equipped with a nonvolatile memory via a wireless network and displays the image data on an image display unit of the image display apparatus. A step in which the image display device displays an identifier display image including a user identifier consisting of a code string having a smaller number of digits than a communication identifier for identifying the image display device in a wireless network on the image display unit; and a communication identifier And a step of connecting a nonvolatile memory storing network setting information including a user identifier and connection software for connecting to a wireless network to an external connection terminal of the information processing device, and the information processing device. Starts the connection software and enters the user identifier in the display means. A step for displaying an identifier input screen, a step for a user to input the same user identifier as the identifier display image displayed on the image display unit of the image display device to the identifier input screen, and the input user identifier And a step of reading a communication identifier corresponding to the above from a non-volatile memory and connecting to the image display device via a network.

  According to the present invention, it is possible to provide an image display system, an image display apparatus, and a network connection method capable of wirelessly connecting an unspecified number of information processing apparatuses to a specific image display apparatus with a simple operation and ensuring security. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the configuration of the image display system and the image display apparatus in this embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a diagram illustrating an installation example of an image display system according to the present embodiment. The projector 1, which is the main body of the image display device, is installed on the ceiling of a conference room or the like, and the screen 1a is installed on the wall surface. The user transmits an image such as a presentation material displayed on the display 22 of the personal computer 2 serving as the information processing apparatus to the wireless LAN 3 via a wireless communication module (not shown) of the personal computer 2. The projector 1 receives this image via its own wireless communication module (not shown) and displays it on the screen 1a which is an image display unit. Conventionally, complicated work is required for wireless connection between the personal computer 2 and the projector 1, but in this embodiment, a USB memory storing setting information for wireless connection is connected to the USB terminal of the personal computer 2. You can easily connect it. Needless to say, the projector 1 may be installed not on the ceiling but on a conference desk or the like.

  FIG. 2 is a block diagram showing the configuration of the projector 1 and the personal computer 2 used in the image display system in the present embodiment.

  The projector 1 includes a communication unit 11 that is a communication unit, an image reception unit 12, a liquid crystal panel 13, a lamp 17, a projection lens 18, a storage unit 19 that is an identifier storage unit, and an identification image generation that is an image generation unit. A portion 16 is provided.

  The image information data received by the communication unit 11 is restored to an image signal by the image receiving unit 12, and the light from the lamp 17 is modulated by the image signal in the liquid crystal panel 13, enlarged by the projection lens 18, and projected onto the screen 1 a. Is done.

  The storage unit 19 is, for example, a ROM (Read Only Memory), in which the communication identifier 14 and the user identifier 15 of the projector 1 are stored.

  The communication identifier 14 is, for example, a MAC address unique to the projector 1 or the like for causing a communication partner such as the personal computer 2 to specify a communication destination. This MAC address has a size of 6 bytes, the upper 3 bytes are used for manufacturer identification, and the lower 3 bytes are assigned by the manufacturer so as not to overlap each other.

  The user identifier 15 corresponds to the MAC address of the projector 1 and is, for example, a 4-digit number that can be easily identified by the user. As a matter of course, the user identifier 15 needs to be a unique value for each projector 1, and is generated based on the serial number of the product.

  The identification image generation unit 16 creates an identifier display image including information on the user identifier 15 read from the storage unit 19. This identifier display image is projected and displayed on the screen 1a, for example, immediately after the projector 1 is turned on, until the wireless connection with the personal computer 2 is completed and the image transmitted from the personal computer 2 is displayed. The The user views the communication identifier 14 of the projector 1 to be connected to the personal computer screen by simply inputting it on the personal computer screen while viewing the simple four-digit user identifier 15 included in the identifier display image on the screen 1a. 2 can be set.

  The personal computer 2 uses a CPU 21 as a control means as a core, a display 22 as a display means, an input device 23 such as a keyboard, a USB terminal 24 as an external connection terminal, an HDD (hard disk drive) 25, and a communication means. A communication unit 26, a storage unit 29, and a RAM (Random Access Memory) 28 that is a main storage memory are provided.

  The storage unit 29 is, for example, a ROM, and a communication identifier 27 of the personal computer 2 is stored in the ROM.

  The communication identifier 27 is a MAC address or the like unique to the personal computer 2 for allowing a communication partner such as the projector 1 to specify a communication destination.

  The image information data stored in the HDD 25 is transmitted to the projector 1 via the communication unit 26 via the wireless LAN 3. The wireless LAN 3 is compliant with a standard such as IEEE 802.11b, for example.

  The USB memory 4 which is a non-volatile memory stores connection software 42 for connecting the projector 1 and the personal computer 2 wirelessly. This connection software 42 includes an application and a driver, and is hereinafter referred to as a wireless manager 42. The USB memory 4 is used by connecting to the USB terminal 24 of the personal computer 2.

  In addition to the wireless manager 42, the USB memory 4 includes an identifier table (network setting information) 41 representing a correspondence relationship between the communication identifier 14 of the projector 1 described above and the simple user identifier 15 corresponding thereto. In addition, an identifier input image 43 having the same format as the identifier display image generated by the identification image generation unit 16 of the projector 1 is stored. The USB memory 4 is attached to the projector 1 as an accessory of the projector 1 and is shipped from the manufacturer. Alternatively, the user can purchase from the manufacturer after purchasing the projector 1.

  When the user inserts the USB memory 4 into the USB terminal 24 of the personal computer 2, the program code of the wireless manager 42 is stored in the RAM 28 automatically or when the user clicks on a setup file or the like in the USB memory 4. When loaded, the wireless manager 42 is activated. The user can easily connect his / her personal computer 2 to the desired projector 1 by operating according to the instructions of the wireless manager 42. At this time, since the wireless manager 42 exists only on the RAM 28 which is a volatile memory and does not remain in the nonvolatile memory such as the HDD 25, the wireless manager 42 is automatically deleted when the wireless manager 42 is terminated or the personal computer 2 is turned off. Is done. Therefore, unnecessary software does not remain in the personal computer 2 after the network connection is completed, which is preferable in terms of security.

  Next, the operation of connecting the projector 1 and the personal computer 2 will be described using FIGS. 3 to 7 with reference to FIG. FIG. 3 is a flowchart showing a wireless connection procedure of the image display system in the present embodiment.

  In FIG. 3, first, in step S1, the user turns on the personal computer 2, and in step S2, the wireless LAN 3 is enabled. Next, the USB memory 4 is inserted into the USB slot (USB terminal 24) of the personal computer 2. As a result, the wireless manager 42 stored in the USB memory 4 is activated automatically or by the user's operation. First, in step S4, the identifier table 41 stored in the USB memory 4 is read into the RAM 28 of the personal computer 2. . Next, in step S5, a display of connection guidance with the projector 1 as shown in FIG.

  FIG. 4 shows the display on the display 22 of the personal computer 2 in the present embodiment. When the cursor is placed on the connection button 22b of the display 22a and clicked, the screen is switched to the screen shown in FIG. 5 in step S6. In FIG. 5, the display 22 c is an identifier input screen for inputting the user identifier 15. As this identifier input screen, an identifier input image 43 stored in advance in the USB memory 4 is displayed together with the wireless manager 42.

  Next, when the user turns on the power of the projector 1 in step S7, a connection destination selection display 1b as shown in FIG. 6 appears on the screen 1a in step S8.

  The display 1c on this screen is an identifier display image generated by the identification image generator 16, and a user identifier (ID) 15 is displayed in the identifier display frame 1d. While watching the user identifier 15 displayed in the identifier display frame 1d, the user, in the next step S9, displays the user identifier (ID) 15 (in this case) in the identifier input frame 22d of the identifier input screen of the personal computer 2. , The number 1001) is input by the input device 23.

  Next, when the connection button 22e in FIG. 5 is clicked in step S10, in step S11, the communication identifier 14 corresponding to the user identifier 15 (the communication identifier corresponding to 1001 read from the USB memory 4 in step S4) is displayed. ) Is used to connect the personal computer 2 and the projector 1.

  Here, data stored in the USB memory 4 will be described with reference to FIG. FIG. 7 is a diagram showing data stored in the USB memory 4 in the present embodiment. The USB memory 4 stores an identifier input image 43 as shown in FIG. This image is image data in the same format as the display 1c (identifier display image generated by the identification image generation unit 16) shown in FIG.

  FIG. 7B shows an identifier table 41 representing a correspondence relationship between the MAC address (communication identifier 14) of the projector 1 and a simple four-digit numeric address (user identifier 15) corresponding thereto. It is. The identifier table 41 includes a set of communication identifiers 14 and user identifiers 15 for a plurality of projectors 1 corresponding to the wireless manager 42.

(Embodiment 2)
Next, Embodiment 2 will be described with reference to FIG. FIG. 8 is a block diagram showing configurations of projector 100 that is an image display device used in the image display system according to the present embodiment and personal computer 2 that is an information processing device. FIG. 8 differs from FIG. 2 only in the storage unit 119 and the identifier conversion unit 101 of the projector 100, and other configurations are the same as those in FIG. .

  The storage unit 119 stores only the communication identifier 14 of the projector 100. The identifier conversion unit 101 converts the communication identifier 14 having a large number of digits such as a MAC address into a user identifier 15 having a code string having a small number of digits. When the power of the projector 100 is turned on, the communication identifier 14 is read from the storage unit 119, converted to the user identifier 15 by the identifier conversion unit 101, and input to the identification image generation unit 16. And the identifier display image produced | generated by the identification image generation part 16 is projected on the screen 1a. Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted. In the present embodiment, it is not necessary to store the user identifier 15 in the storage unit 119 in advance. Even when the communication identifier 14 of the projector 100 is changed for some reason (communication module replacement or the like), the user identifier 15 is changed by the identifier conversion unit 101 only by changing the communication identifier 14 in the storage unit 119. Automatically generated.

  As described above, the image display system and the image display apparatus of the present invention do not need to install the wireless connection software (wireless manager 42) in the personal computer 2 in advance, and at the time of using the projector 1, the USB The memory 4 can be connected to the projector 1 simply by inserting the memory 4 into the personal computer 2 and inputting a simple code displayed on the projection image of the projector 1 to the personal computer 2. For this reason, it is not necessary to install extra software in the personal computer 2, which is desirable from the viewpoint of information security. Even when a presentation is performed using the personal computer 2 and the projector 1 brought by a visitor or the like, the presentation can be started immediately by simply inserting the USB memory 4 into the personal computer 2.

  In addition, since the input screen of the personal computer 2 has the same format as the projection image of the projector 1, the user can intuitively grasp the identifier to be input, so that the input operation is easy to understand and the operation is simple.

  In the above embodiment, in the description of FIG. 7, the address information stored in the USB memory 4 is a plurality of MAC addresses (addresses corresponding to a plurality of projectors). This is intended to be commonly used for projectors 1 to be manufactured. By making it common, even if the USB memory 4 is lost, the USB memory 4 of another projector can be used. If this is not taken into account, the USB memory 4 may store only a pair of the communication identifier 14 and the user identifier 15 corresponding to the projector 1 and dedicated to the projector 1. In this case, simply by connecting the USB memory 4 to the personal computer 2, the identifier input operation can be omitted, and the projector 1 can be automatically connected.

  In the above-described embodiment, the power source of the personal computer 2 is turned on and then the projector 1 is turned on (FIG. 3).

  In the above embodiment, it has been described that the user identifier 15 is stored in the storage unit 19 together with the communication identifier 14, but the user identifier 15 and the communication identifier 14 are stored in different memories. May be.

  In the above embodiment, the USB memory 4 stores the identifier table 41 (FIG. 7B) indicating the correspondence between the communication identifier 14 of the projector 1 and the user identifier 15. It has been described that the projector 1 to be connected in the wireless LAN 3 is specified by reading the communication identifier 14 corresponding to the user identifier 15 input on the input screen from the USB memory 4 and setting it in the personal computer 2. The projector 1 to be connected may be specified by such a method.

  As a first method, user identifiers 15 are embedded in SSIDs (Service Set IDs) of all projectors 1 connected to the wireless LAN 3. For example, a user identifier 15 consisting of a 4-digit number is included after four alphabetic characters “PROJ” in alphanumeric characters within 32 characters representing an SSID. When the wireless manager 42 is activated, the SSIDs of all the projectors 1 in the network are checked, and the projector 1 including the user identifier (four-digit number) 15 input on the identifier input screen of the personal computer 2 is automatically searched. It may be. In this way, it is not necessary to store the identifier table 41 in the USB memory 4.

  As a second method, first, the personal computer 2 requests each network (assuming that the personal computer 2 is connected to a plurality of wireless LANs 3) to request the user identifier 15 of each projector 1 in the network. An identifier request command is transmitted by broadcast. Next, each projector 1 that has received the identifier request command returns its own user identifier 15 to the personal computer 2. Thereby, the personal computer 2 may specify and connect the projector 1 having the user identifier 15 input on the identifier input screen. Also in this case, it is not necessary to store the identifier table 41 in the USB memory 4.

  In the above embodiment, the non-volatile memory is described as the USB memory 4, but other semiconductor memories such as an SD memory and a CF memory may be used. Furthermore, an optical disk such as a DVD or a hard disk may be used as long as it is a removable medium that can be read and written by the personal computer 2.

In the above embodiment, IEEE802.11b is described as an example of the wireless communication method. However, other wireless communication methods such as IEEE802.11a / g / n, Bluetooth, UWB (Ultra Wide Band), or infrared communication are used. May be used.
In the above embodiment, the MAC address is described as an example of the communication identifier 14, but an IP address may be used as the communication identifier 14.

  In the above embodiment, the display screen of the personal computer 2 is divided into the two screens shown in FIGS. 4 and 5. However, these two screens may be displayed as one screen.

  In the above embodiment, the projection type image display device such as the projector 1 or 100 has been described as an example. However, the present invention is an image display device such as a liquid crystal display, a plasma display, or a CRT display, and an image provided with wireless communication means. Applicable to display devices.

  The present invention is not limited to projectors and personal computers, and can be widely used in image display systems and network connection methods including image display devices and information processing devices compatible with wireless networks.

The figure which shows the example of installation of the image display system in Embodiment 1 of this invention. Block diagram showing the configuration of the projector and personal computer used in the image display system A flowchart showing a wireless connection procedure in the image display system The figure which shows the display of the display of the personal computer in Embodiment 1 of this invention The figure which shows the display of the display of the personal computer The figure which shows the projection screen of the projector in Embodiment 1 of this invention The figure which shows the data stored in the USB memory in Embodiment 1 of this invention The block diagram which shows the structure of the projector and personal computer which are used for the image display system in Embodiment 2 of this invention.

Explanation of symbols

1,100 projector (image display device)
1a Screen (image display part)
1b, 1c, 22a, 22c Display 1d Identifier display frame 2 Personal computer (information processing device)
3 Wireless LAN (wireless network)
4 USB memory (nonvolatile memory)
11, 26 Communication unit (communication means)
DESCRIPTION OF SYMBOLS 12 Image receiving part 13 Liquid crystal panel 14,27 Communication identifier 15 User identifier 16 Identification image generation part (image generation means)
17 Lamp 18 Projection lens 19, 29, 119 Storage unit (identifier storage means)
21 CPU (control means)
22 Display (display means)
22b, 22e Connection button 22d Identifier input frame 23 Input device 24 USB terminal (external connection terminal)
25 HDD (Hard Disk Drive)
28 RAM
41 Identifier table 42 Wireless manager (software for connection)
43 identifier input image 101 identifier converter (identifier converter)

Claims (12)

An image display system for transmitting image data from an information processing apparatus capable of mounting a nonvolatile memory via a wireless network and displaying the image data on an image display unit of the image display apparatus,
The image display device includes:
Communication means for connecting to the wireless network;
Identifier storage means for storing a communication identifier for identifying the image display device in the wireless network;
Image generating means for generating an identifier display image including an identifier for a user consisting of a code string having a smaller number of digits than the communication identifier,
The information processing apparatus includes:
Display means;
Communication means for connecting to the wireless network;
An external connection terminal for connecting the nonvolatile memory,
The nonvolatile memory stores network setting information including the communication identifier and the user identifier, and connection software for connecting to the wireless network,
By connecting the nonvolatile memory to the external connection terminal by the user,
Start the connection software,
Displaying an identifier input screen for inputting the user identifier on the display means;
By inputting the same identifier for the user as the identifier display image displayed on the image display unit of the image display device to the identifier input screen by the user,
Control means for reading the communication identifier corresponding to the user identifier from the nonvolatile memory and controlling the communication with the image display device;
An image display system comprising: The image display system according to claim 1, wherein the user identifier is stored in the image display device in advance. The image display system according to claim 1, wherein the image display device further includes an identifier conversion unit, and the identifier conversion unit generates the user identifier based on the communication identifier. The network setting information stored in the nonvolatile memory includes only a communication identifier and a user identifier corresponding to the image display device. Image display system. The non-volatile memory further stores an identifier input image of substantially the same format as the identifier display image generated by the image generation means,
The image display system according to claim 1, wherein the control unit reads the identifier input image from the nonvolatile memory and displays the identifier input image on the display unit as the identifier input screen. . The image display system according to claim 1, wherein the nonvolatile memory is a USB memory. The image display system according to claim 1, wherein the image display device is a projection type image display device, and the image display unit is a screen. An image display device that receives image data from an information processing device via a wireless network and displays the image data on an image display unit,
Communication means for connecting to the wireless network;
Identifier storage means for storing a communication identifier for identifying the image display device in the wireless network;
Image generating means for generating an identifier display image including an identifier for a user consisting of a code string having a smaller number of digits than the communication identifier,
An image display device that displays the identifier display image on the image display unit. 9. The image display apparatus according to claim 8, wherein the user identifier is stored in advance in the identifier storage unit. 9. The image display device according to claim 8, further comprising an identifier conversion unit, wherein the identifier conversion unit generates the user identifier based on the communication identifier. The image display device according to claim 8, wherein the image display device is a projection-type image display device, and the image display unit is a screen. A network connection method in an image display system for transmitting image data from an information processing apparatus to which a nonvolatile memory can be attached via a wireless network and displaying the image data on an image display unit of the image display apparatus,
The image display device displaying an identifier display image including an identifier for a user including a code string having a number of digits smaller than a communication identifier for identifying the image display device in the wireless network on the image display unit;
A user connects a non-volatile memory storing network setting information including the communication identifier and the user identifier and connection software for connecting to the wireless network to an external connection terminal of the information processing apparatus. And steps to
The information processing apparatus is
Activating the connection software;
Displaying an identifier input screen for inputting the user identifier on a display means;
A user inputting the same identifier for the user as the identifier display image displayed on the image display unit of the image display device to the identifier input screen;
Reading a communication identifier corresponding to the input user identifier from the nonvolatile memory and connecting to the image display device via a network;
A network connection method characterized by comprising:

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