JP2008015402A - Image display apparatus, image display system, and network connection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display apparatus, an image display system and a network connection method, in which a procedure for connecting a network to an image display apparatus such as a projector can be easily performed. <P>SOLUTION: When an instruction for starting wireless LAN connection is received, a control part 55 reads out connection information stored in a storage part 56 from the storage part 56 and encodes the read connection information to generate image data expressing a connection information code. When the generated image data are output to an image signal processing part 60, an image (projection image IM) corresponding to the image signal is projected from an image projection part 51 and the connection information code is displayed on a screen SC. When a user operates an operation part 57 or a remote controller RC in a state that the connection information code is projected, the projection image, i.e. the connection information code, can be enlarged or reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image display device, an image display system, and a network connection method.

  In recent years, when presenting and reporting at meetings, etc., the contents stored as digital data in a personal computer (hereinafter referred to as “PC”) are enlarged and displayed by a projector, so that the contents of the announcement can be displayed to many participants. It is possible to make it visible. Furthermore, recently, by using a projector capable of wireless communication by a wireless LAN (Local Area Network), it is possible to wirelessly transfer data from a PC to the projector. If such a projector is used, the cable will not be in the way, and even when a plurality of presenters make a presentation using each PC, the work of reconnecting the cable can be eliminated.

  However, in order to establish a network connection from a PC to a projector via a wireless LAN, necessary connection information, for example, an IP address of the projector, an identifier such as an ESSID (Extended Service Set Identifier) indicating a network name, or encryption of communication data It is necessary to input a password or the like in WEP (Wired Equivalent Privacy), which is a computer technology, to a PC. In order to perform this input work, it is necessary to check the connection information of the projector in advance, and even if the connection information is grasped, it is difficult to perform the input work without knowledge about the network. .

  In view of such problems, Patent Document 1 discloses a technique for easily accessing another electronic device (for example, a projector) from one electronic device (for example, a portable information terminal). In the image display system described in Patent Document 1, connection information (ID information) for connecting to a projector is attached to a projector main body or a part of a screen in the form of a non-contact tag or a bar code. When a portable information terminal equipped with a non-contact tag reader or barcode reader is brought close to a projector or screen and the portable information terminal reads connection information, the portable information terminal connects to the projector based on the read connection information. Can be established.

International Publication No. WO2003-015451

  However, in the image display system described in Patent Document 1, it is necessary to perform an operation of attaching a non-contact tag, a barcode (printed material) or the like as ID information to a projector or a screen, and attaching incorrect ID information at that time There was a fear. Further, when the attached ID information is read, it is necessary to bring the portable information terminal closer to the projector or the screen, so that the user has to move with the portable information terminal every time the connection is made.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image display device, an image display system, and an image display device capable of easily performing a procedure for performing a network connection to an image display device such as a projector. To provide a network connection method.

  An image display device of the present invention is an image display device that displays an image based on an image signal input from an image supply device via a network, and stores connection information for network connection to the image display device. Storage means; encoding means for generating a connection information code in which the connection information is encoded so as to be recognizable by the image supply device; and displaying an image based on the image signal and displaying the connection information code as an image And a code size changing means for changing the display size of the connection information code displayed by the display means.

According to this image display device, in order to generate connection information code by encoding connection information for network connection to itself and to display this as an image, a non-contact tag or printed matter on which connection information is written is displayed as an image. There is no need to perform the work of attaching to the display device, and there is no possibility of attaching incorrect connection information.
Furthermore, since a code size changing means for changing the display size of the connection information code is provided, the connection information code can be displayed in a size suitable for recognition by the image supply device, and the user can connect the connection information to the image supply device. Convenience when recognizing is improved.
As a result, the procedure for connecting to the image display apparatus via the network can be easily performed.

  In this image display device, the code size changing unit may change the display size of the connection information code every predetermined time.

  According to this image display device, since the code size changing unit changes the display size of the connection information code every predetermined time, the user can connect the connection information to the image supply device when the connection information code becomes a desired display size. And the user does not need to perform an operation to change the display size.

  In this image display device, the display means may display the connection information code at a plurality of positions.

  According to this image display apparatus, since the display means displays the connection information code at a plurality of positions, the user can use the connection information code at a position that can be easily recognized by the image supply apparatus. Will improve.

  An image display system of the present invention is an image display system including an image supply device that outputs an image signal and an image display device that displays an image based on the image signal input from the image supply device via a network. The image display device stores storage information for network connection to the image display device, and a code for generating a connection information code that encodes the connection information so that the image supply device can recognize the connection information. Display means for displaying an image based on the image signal, displaying the connection information code as an image, and code size changing means for changing the display size of the connection information code displayed by the display means And the image supply device recognizes the connection information by analyzing the connection information code displayed by the display means. And connection information recognition means, on the basis of the connection information the connection information recognized by the recognition unit, and having a network connection unit for performing the image display device and the network connection.

According to this image display system, the image display device generates connection information code by encoding connection information for network connection to itself, and displays this as an image. There is no need to perform work for attaching a printed matter or the like to the image display device, and there is no possibility of attaching incorrect connection information.
Furthermore, since a code size changing means for changing the display size of the connection information code is provided, the connection information code can be displayed in a size suitable for recognition by the image supply device, and the user can connect the connection information to the image supply device. Convenience when recognizing is improved.
As a result, the procedure for connecting to the image display apparatus via the network can be easily performed.

  The network connection method of the present invention includes an image supply device that outputs an image signal and a display unit, and the display unit displays an image based on the image signal input from the image supply device via a network. A network connection method of an image display system including an image display device that generates a connection information code in which the image display device encodes connection information for network connection to the image display device so that the image supply device can recognize the connection information A first step in which the image display device displays the connection information code by the display means, and an instruction for the image display device to change the display size of the connection information code. A third step of accepting the connection information, and the image display device based on the instruction received in the third step of the connection information. A fourth step of changing a display size of the code; a fifth step of the image supply device analyzing the connection information code displayed by the display means to recognize the connection information; and the image supply device. Has a sixth step of performing network connection with the image display device based on the recognized connection information.

According to this network connection method, the image display device generates connection information code by encoding connection information for network connection to itself, and displays this as an image. There is no need to perform work for attaching a printed matter or the like to the image display device, and there is no possibility of attaching incorrect connection information.
Furthermore, since the image display device changes the display size of the connection information code according to the user's instruction, the user can display the connection information code in a size suitable for recognition by the image supply device. Convenience in making the device recognize the connection information is improved.
As a result, the procedure for connecting to the image display apparatus via the network can be easily performed.

  Further, when the image display device, the image display system, and the network connection method described above are constructed using a computer provided in the image display device and the image supply device, the present invention realizes the function. It is also possible to configure in the form of a program for recording or a recording medium on which the program is recorded so as to be readable by the computer. As recording media, flexible disks, CD-ROMs, magneto-optical disks, IC cards, ROM cartridges, punch cards, printed matter on which codes such as barcodes are printed, projector internal storage devices (memory such as RAM and ROM), Various media that can be read by the computer, such as an external storage device, can be used.

(First embodiment)
An image display system according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram illustrating a schematic configuration of the image display system according to the first embodiment.
As shown in FIG. 1, the image display system 1 includes a projector 50 and a mobile phone 80 that can perform network communication via a wireless local area network (LAN).
The cellular phone 80 can supply an image signal to the projector 50 in a state in which the wireless LAN network connection (wireless LAN connection) is made with the projector 50, and the image supply according to the present invention. It corresponds to a device. The projector 50 is an image display device that is installed (suspended from a ceiling) in a conference room or the like and projects an image corresponding to an input image signal onto a screen SC or the like provided on a wall surface. FIG. 1 shows an example in which an ad hoc mode in which devices are connected to each other without using an access point is used as a wireless LAN connection form.

  When the projector 50 establishes a wireless LAN connection with the mobile phone 80, the projector 50 displays a connection information code CC obtained by graphicizing (encoding) connection information necessary for connection, such as an ESSID (Extended Service Set Identifier) representing a network name. Can be projected. In this embodiment, a QR code (registered trademark), which is a matrix type two-dimensional code, is used as the connection information code CC. However, another matrix type two-dimensional code or a stack type in which barcodes are stacked. The two-dimensional code may be used. Alternatively, a code other than the two-dimensional code, such as a three-dimensional code that changes the two-dimensional code in time series, can be used.

  The cellular phone 80 includes an imaging unit 85 including a CCD camera or the like, and can capture the connection information code CC projected from the projector 50 onto the screen SC. Furthermore, the cellular phone 80 can recognize the connection information of the projector 50 from the captured connection information code CC, and by making a wireless LAN connection with the projector 50 based on this connection information, the projector 50 An image signal can be supplied to the.

Next, schematic configurations of the projector 50 and the mobile phone 80 will be described.
FIG. 2 is a block diagram showing a schematic configuration of the projector 50 and the mobile phone 80 in the image display system 1.
As shown in FIG. 2, the projector 50 includes an image projection unit 51 as a display unit, a control unit 55, a storage unit 56 as a storage unit, an operation unit 57, an operation signal reception unit 58, and an interface (I / F) unit 59. , An image signal processing unit 60, a lamp driving unit 61, a zoom driving unit 62, a communication unit 63, a light valve driving unit 64, a remote controller RC, and the like. The image projection unit 51 includes a light source unit 52, three liquid crystals. Light valves 53R, 53G, and 53B, a projection lens 54, and the like are included.

  The light source unit 52 includes a discharge lamp 52a such as a high-pressure mercury lamp or a metal halide lamp, and a reflector 52b that reflects light emitted from the discharge lamp 52a toward the liquid crystal light valves 53R, 53G, and 53B. Light emitted from the light source unit 52 is converted into light having a uniform luminance distribution by an integrator optical system (not shown), and red (R) and green (G), which are the three primary colors of light, by a color separation optical system (not shown). ) And blue (B) light components are separated and then incident on the liquid crystal light valves 53R, 53G, and 53B, respectively.

  Each of the liquid crystal light valves 53R, 53G, and 53B has a plurality of pixels formed in a matrix, and the light valve drive unit 64 drives the liquid crystal light valves 53R, 53G, and 53B based on the input image signal. Thus, the light emitted from the light source unit 52 is modulated for each pixel by the liquid crystal light valves 53R, 53G, and 53B, and image light corresponding to the image signal is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become image light representing a color image, and then enlarged and projected onto the screen SC or the like by the projection lens 54.

  The projection lens 54 includes a zoom mechanism, and enlarges or reduces the projected image (projected image) by changing the positional relationship of the plurality of lens groups constituting the projection lens 54 in the optical axis direction. Is possible.

  The control unit 55 includes a CPU (Central Processing Unit) and the like, and functions as a computer. The control unit 55 operates according to a control program stored in the storage unit 56 and is connected via the bus 65. The operation of 56 to 62 is comprehensively controlled.

  The storage unit 56 is configured by a non-volatile memory such as a mask ROM (Read Only Memory), a flash memory, or an FeRAM (Ferroelectric Random Access Memory). The storage unit 56 stores various control programs and various data for controlling the operation of the projector 50.

  The data stored in the storage unit 56 includes connection information necessary when an external device connects to the projector 50 via a wireless LAN. In this embodiment, there are two types of connection information when connecting in an ad hoc mode, which is a connection mode without an access point, and when connecting in an access point mode (infrastructure mode), which is a connection mode with an access point. It is remembered. The connection information for connecting in the ad hoc mode includes the ESSID in addition to the access mode identifier indicating that the connection form (access mode) is the ad hoc mode, and the connection information for connecting in the access point mode In addition to the access mode identifier indicating that the access mode is the access point mode, ESSID, information indicating whether or not to use DHCP (Dynamic Host Configuration Protocol), the IP address of the projector 50, the subnet mask, the default gateway, And a password of WEP (Wired Equivalent Privacy) for encrypting communication data.

  In addition, the control program stored in the storage unit 56 includes a connection establishment program PP that defines the processing contents and the order for establishing a wireless LAN connection with an external device. The connection establishment program PP includes a code generation program for encoding connection information and generating a connection information code CC as a subroutine. In addition, since it becomes possible to encode the connection information memorize | stored in the memory | storage part 56 because the control part 55 operate | moves according to this code generation program, the control part 55 at the time of operate | moving according to a code generation program becomes possible. This corresponds to the encoding means of the present invention.

  The operation unit 57 and the remote controller RC include a plurality of operation buttons for giving various instructions to the projector 50. The operation buttons included in the operation unit 57 and the remote controller RC include a “power button” for turning on / off the power, a “menu button” for projecting a menu image, a “cursor button” for moving a cursor on the menu image, There are a “connect button” for instructing a wireless LAN connection, a “zoom wide button”, a “zoom tele button”, and the like for changing the zoom state of the projection lens 54. When the user operates various operation buttons on the operation unit 57, the operation unit 57 outputs an operation signal corresponding to the operation content of the user to the control unit 55. When the user operates various operation buttons of the remote controller RC, the remote controller RC generates an infrared operation signal corresponding to the user's operation content, and the operation signal receiving unit 58 receives this and transmits it to the control unit 55.

  The interface unit 59 includes various device controllers such as a USB (Universal Serial Bus) controller and a PCI (Peripheral Component Interconnect) controller, and performs data input / output with an external device. The interface unit 59 is provided with a card slot and a USB port (both not shown) for connecting an external device, and a communication unit 63 is connected to the card slot of this embodiment.

  The communication unit 63 is a wireless LAN card that complies with wireless LAN standards such as IEEE 802.11b, IEEE 802.11g, IEEE 802.11a, and the like. Signals can be received. When the communication unit 63 receives the image signal, the control unit 55 outputs the image signal to the image signal processing unit 60. The communication unit 63 may be any wireless terminal device that can be connected to a wireless LAN. For example, a wireless LAN adapter attached to a USB port or a wireless LAN module built in the projector 50 may be used. Good.

The image signal processing unit 60 is an image processor, and performs various image processing such as scaling on an image signal input via an input terminal (not shown) or the interface unit 59, and the processed image signal Is output to the light valve driving unit 64.
The light valve driving unit 64 drives the three liquid crystal light valves 53R, 53G, and 53B based on the image signal input from the image signal processing unit 60. As a result, an image (image light) corresponding to the image signal is projected from the image projection unit 51.

  The lamp driving unit 61 is a lighting control circuit that controls lighting and extinguishing of the light source unit 52, an igniter circuit that generates a high voltage to form a discharge path for lighting the light source unit 52, and a stable after lighting It includes a ballast circuit (none of which is shown) for maintaining the lighting state.

  The zoom drive unit 62 can enlarge or reduce the projected image by driving the zoom mechanism of the projection lens 54 based on an instruction from the control unit 55. When the zoom wide button of the operation unit 57 is operated (pressed) by the user, the control unit 55 instructs the zoom drive unit 62 to drive the zoom mechanism to the wide (wide angle) side to enlarge the projected image. To do. On the other hand, when the user operates the zoom tele button of the operation unit 57, the zoom drive unit 62 is instructed to drive the zoom mechanism to the tele (telephoto) side, thereby reducing the projected image. The control unit 55 causes the zoom drive unit 62 to drive the zoom mechanism while the operation of the zoom wide button or the zoom tele button (zoom operation) continues, and the user stops the zoom operation or zooms in. When the state reaches the wide end or tele end, the drive is stopped.

Next, a schematic configuration of the mobile phone 80 will be described.
The mobile phone 80 includes a control unit 81, a storage unit 82, an operation unit 83, a display unit 84, an imaging unit 85, a communication unit 86, etc., in addition to call means (not shown) such as a call antenna, a microphone, and a speaker. ing.

  The control unit 81 includes a CPU and functions as a computer, and operates according to the control program stored in the storage unit 82 to operate the units 82 to 86 connected via the bus 87. Oversee and control.

  The storage unit 82 is configured by a non-volatile memory such as a mask ROM, flash memory, or FeRAM. The storage unit 82 stores various control programs for controlling the operation of the mobile phone 80, image data for projection by the projector 50, and the like.

  The control program stored in the storage unit 82 includes a connection establishment program PM that defines the processing contents and the order for establishing a wireless LAN connection with an external image display apparatus. In the connection establishment program PM, a code analysis program for analyzing the connection information code CC included in the image captured by the imaging unit 85 and recognizing the connection information included in the connection information code CC is included as a subroutine. Yes. Since the control unit 81 operates according to the code analysis program, the captured connection information code CC can be analyzed and the connection information included therein can be recognized. The control unit 81 corresponds to connection information recognition means of the present invention.

  The operation unit 83 includes a plurality of operation buttons for giving various instructions to the mobile phone 80. As operation buttons provided in the operation unit 83, in addition to various buttons (call buttons) necessary for making a call, the mobile phone 80 can be used as a telephone (telephone mode) and the digital camera can be used. “Camera mode” etc. “mode switching button”, “connect button” for instructing wireless LAN connection, “disconnect button” for instructing disconnection of wireless LAN connection, and imaging unit 85 capturing an image There is a “shutter button” for instructing (recording). When the user operates the operation button of the operation unit 83, the operation unit 83 outputs an operation signal corresponding to the operation content of the user to the control unit 81. Note that the connection button, the disconnect button, the shutter button, the call button, etc. need not all be independent buttons, and an operation signal that is output in response to mode switching or the like by assigning a plurality of functions to one button. May be switched.

  The display unit 84 is, for example, an active matrix driving type liquid crystal display device driven by TFT (Thin Film Transistor), and displays an image based on image data output from the control unit 81 or the imaging unit 85.

  The imaging unit 85 is configured by, for example, a CCD (Charge Coupled Device) camera, a CMOS (Complementary Metal Oxide Semiconductor) camera, or the like. The imaging unit 85 images a subject based on an instruction from the control unit 81, and obtains an imaging result (captured image). Generate image data to represent. The cellular phone 80 starts periodic imaging (generation of image data) from the time when it is switched to the camera mode by a user operation or the like, and displays the captured image on the display unit 84 in real time (monitor display). In this state, when the user operates (presses) the shutter button of the operation unit 83, the control unit 81 stores image data for one frame (one screen) generated by the imaging unit 85 at that time in the storage unit 82. Remember (record). Note that in this specification, imaging for monitor display on the display unit 84 is simply referred to as “imaging”, and storing image data in the storage unit 82 in accordance with the operation of the shutter button is “imaging (recording)”. Is written.

  The communication unit 86 is a wireless LAN module that supports wireless LAN standards such as IEEE 802.11b, IEEE 802.11g, IEEE 802.11a, and the like. Signal transmission or the like can be performed. When the mobile phone 80 includes a card slot or a USB port for connecting an external device, a wireless LAN card or a wireless LAN adapter that can be connected to these may be used as the communication unit 86.

Next, the operation of the image display system 1 will be described with reference to the drawings.
FIG. 3 is a flowchart for explaining the operation of the projector 50.
When the projector 50 is turned on, the control unit 55 starts an operation according to the control program stored in the storage unit 56, performs various initialization operations, and then operates the operation unit 57 and the operation signal reception unit 58. Wait for signal input from. In this state, the user can give an instruction to start a wireless LAN connection with an external device (cell phone 80) by operating the connection button of the operation unit 57 or the remote controller RC. Although illustration is omitted, when the connection button is operated, the control unit 55 projects a menu image for selecting the access mode from the image projection unit 51, and the user can set the access mode as ad hoc. Either mode or access point mode must be specified.

  As shown in FIG. 3, in step S101, the control unit 55 instructs to start a wireless LAN connection based on operation signals input from the operation unit 57 and the operation signal reception unit 58 (operation of a connection button). It is determined whether or not. If there is an instruction, the access mode is selected as described above, and then the process proceeds to step S102. If there is no instruction, step S101 is repeated.

  When the process proceeds to step S102 in response to an instruction for starting a wireless LAN connection, the control unit 55 starts an operation according to the connection establishment program PP stored in the storage unit 56. First, connection information of a designated access mode (for example, ad hoc mode) is read from the storage unit 56, and settings for performing a wireless LAN connection are performed on the projector 50 based on the connection information.

  Thereafter, in step S103, the control unit 55 operates in accordance with a code generation program that is a subroutine of the connection establishment program PP, and encodes the read connection information to generate image data representing the connection information code CC. When generating this image data, the liquid crystal light valve 53R that determines the resolution of the projected image from the substantially square cells (minimum unit) constituting the connection information code CC in order to recognize the connection information with high accuracy. , 53G, 53B must be sufficiently larger than one pixel. In the present embodiment, the image data is generated so that the connection information code CC is located at the approximate center of the projected image.

  In step S104, the control unit 55 outputs the generated connection information code CC (image data) to the image signal processing unit 60 as an image signal. As a result, an image (projected image IM) corresponding to the image signal is projected from the image projection unit 51, and the connection information code CC is displayed on the screen SC (see FIG. 1). Here, a message such as “Please photograph this connection information code to establish a wireless LAN connection” may be displayed in the margin of the projected image IM.

  While the connection information code CC is projected, the user enlarges the projection image IM, that is, the connection information code CC by operating the “zoom wide button” or “zoom tele button” of the operation unit 57 or the remote controller RC. Can be reduced or reduced.

  In step S105, the control unit 55 determines whether or not the user has performed a zoom operation, that is, an operation of the operation unit 57 or the zoom wide button or the zoom tele button of the remote controller RC. If the zoom operation has been performed, the process proceeds to step S106. If the zoom operation has not been performed, the process proceeds to step S107.

  When the zoom operation has been performed and the process proceeds to step S106, the control unit 55 instructs the zoom drive unit 62 according to the operation content of the user to drive the zoom mechanism of the projection lens 54. Thereby, the projected connection information code CC is enlarged or reduced according to the user's operation content.

  Thereafter, in step S107, the control unit 55 determines whether a connection request command is received from the mobile phone 80 via the communication unit 63 and the interface unit 59. The connection request command is a command that the mobile phone 80 transmits to the projector 50 when the user operates the operation unit 83 of the mobile phone 80 to instruct the mobile phone 80 to establish a wireless LAN connection with the projector 50. If a connection request command is received, the process proceeds to step S108. If not received, the process returns to step S105.

  When the connection request command is received and the process proceeds to step S <b> 108, the control unit 55 transmits a connection response command permitting connection from the communication unit 63 to the mobile phone 80. As a result, a wireless LAN connection is established between the mobile phone 80 and the projector 50, and an image signal can be transmitted from the communication unit 86 of the mobile phone 80 to the communication unit 63 of the projector 50.

  In step S <b> 109, the control unit 55 receives the image signal transmitted from the mobile phone 80 by the communication unit 63 and outputs this to the image signal processing unit 60. As a result, an image (received image) corresponding to the received image signal is projected from the image projection unit 51 and displayed on the screen SC.

  While projecting the received image, the user can instruct to disconnect the wireless LAN connection by operating a disconnect button provided on the operation unit 83 of the mobile phone 80. When the disconnect button is operated, the mobile phone 80 transmits a disconnect request command to the projector 50.

  In step S <b> 110, the control unit 55 determines whether a disconnection request command is input from the mobile phone 80 via the communication unit 63. When the disconnection request command is input, the wireless LAN connection disconnection process is executed (step S111), and the execution of the connection establishment program PP is terminated and the process returns to the standby state. On the other hand, if there is no disconnection instruction, the process returns to step S109 and projection of the received image is continued.

Next, a flowchart of the mobile phone 80 will be described.
FIG. 4 is a flowchart for explaining the operation of the mobile phone 80.
When the mobile phone 80 is turned on, the control unit 81 starts an operation according to the control program stored in the storage unit 82, performs various initialization operations, and then receives an incoming call to the calling means, and the operation unit. A signal input from 83 is awaited. In this state, the user can issue an instruction to start a wireless LAN connection with the projector 50 by operating the connection button of the operation unit 83.

  As shown in FIG. 4, in step S <b> 121, the control unit 81 determines whether or not an instruction for starting a wireless LAN connection (operation of a connection button) has been made based on an operation signal input from the operation unit 83. to decide. If an instruction is given, the process proceeds to step S122. If no instruction is given, step S121 is repeated.

  When the process proceeds to step S122 upon receiving an instruction for starting a wireless LAN connection, the control unit 81 starts an operation according to the connection establishment program PM stored in the storage unit 82. First, the mobile phone 80 is switched to the camera mode, and the connection information code imaging screen is displayed on the display unit 84 to prompt the connection information code CC to be imaged. For example, as shown in FIG. 1, the connection information code imaging screen is a screen including a monitor area that displays an image captured by the imaging unit 85 in real time below the title (“barcode reading”). Bracketed guide marks are displayed at the four corners of the monitor area. This guide mark is a measure of the size to be imaged (recorded) when the connection information code CC is imaged (recorded), and the connection information code CC is imaged (recorded) in the size indicated by the guide mark. By doing so, the recognition accuracy at the time of recognizing connection information can be improved.

  Therefore, in a state where the connection information code CC is displayed on the screen SC (step S104), the user directs the imaging unit 85 of the mobile phone 80 to the screen SC and displays the connection information code CC displayed on the screen SC. A zoom operation (steps S105 and S106) is performed on the projector 50 so that the size of the connection information code CC displayed in the monitor area is substantially the same as that of the guide mark. Thereafter, when the user performs an operation (imaging operation) of the shutter button of the operation unit 83, the connection information code CC is imaged (recorded) with a size suitable for the recognition.

  In step S123, the control unit 81 determines whether an imaging operation has been performed. If the imaging operation has been performed, the process proceeds to step S124. If the imaging operation has not been performed, step S123 is repeated.

  When the imaging operation is performed and the process proceeds to step S124, the control unit 81 stores the captured image (image data) in the storage unit 82 and operates according to the code analysis program that is a subroutine of the connection establishment program PM, An attempt is made to recognize the connection information by analyzing the connection information code CC included in the captured image.

  In step S125, the control unit 81 determines whether connection information has been recognized as a result of analysis of the connection information code CC. If the connection information can be recognized, the process proceeds to step S127. If the connection information cannot be recognized, a message indicating that the recognition has failed (“recognition failure”, “again, the connection information code is captured again). Please display "on the display unit 84 (step S126), and the process returns to step S122.

  When the connection information is successfully recognized and the process proceeds to step S127, the control unit 81 performs setting for performing the wireless LAN connection on the mobile phone 80 based on the recognized connection information.

  Further, in step S128, the control unit 81 transmits a connection request command for requesting a wireless LAN connection with the projector 50 to the projector 50 based on the recognized connection information.

  In step S129, control unit 81 determines whether or not a connection response command permitting connection is received from projector 50. If received, a wireless LAN connection with the projector 50 is established, and the process proceeds to step S130. On the other hand, if the connection response command has not been received, step S129 is repeated. In addition, since the control part 81 performs wireless LAN connection (network connection) based on the recognized connection information by executing steps S127 to S129, the control part 55 when executing steps S127 to S129 This corresponds to the network connection means of the invention.

  In step S <b> 130, the control unit 81 reads image data to be projected by the projector 50 from the storage unit 82, and transmits the image data as an image signal from the communication unit 86 to the projector 50.

  In step S131, based on the operation signal from the operation unit 83, the control unit 81 determines whether an instruction for disconnecting the wireless LAN connection (operation of a disconnect button) has been made by the user. If there is an instruction, processing for disconnecting the wireless LAN connection such as transmission of a disconnection request command to the projector 50 (step S132) is performed and the process returns to the standby state. On the other hand, if there is no instruction, the process returns to step S130 and the transmission of the image signal is continued.

  In the present embodiment, since the size (display size) of the displayed connection information code CC is changed by driving the zoom mechanism of the projection lens 54, the zoom mechanism of the projection lens 54 and the zoom mechanism are The zoom drive unit 62 that drives and the control unit 55 that gives an instruction to the zoom drive unit 62 correspond to the code size changing means of the present invention.

As described above, according to the image display system 1 of the present embodiment, the following effects can be obtained.
According to the image display system 1 of this embodiment, the projector 50 encodes connection information for wireless LAN connection to itself, generates the connection information code CC, and projects this as an image. There is no need to perform the operation of attaching the contactless tag or the printed matter to the projector 50 or the screen SC, and there is no possibility of attaching incorrect connection information.

  In addition, when a printed matter in which the connection information code is written is attached to the projector 50 or the like, it is desirable to attach a small printed item so as not to be obtrusive. However, in the present embodiment, the connection information code CC is used. Since it is displayed by a projected image, it can be displayed only when connection work is performed, and can be displayed in a large size. As a result, the user can perform connection work (work for causing the mobile phone 80 to recognize connection information) in a wide range, and the necessity of moving to a position where the mobile phone 80 can be recognized is reduced.

  Furthermore, since the display size of the connection information code CC can be changed by zooming the projector 50, the connection work can be performed in a wider range, and the size suitable for recognition by the mobile phone 80. Since it is possible to display the connection information code CC, the need for the user to move with the mobile phone 80 is further reduced. That is, when the user operating the mobile phone 80 is away from the screen SC, the connection information code CC is displayed in a large size, and when the user is close to the screen SC, the connection information code CC is displayed in a small size. Can do.

  As a result, the procedure for establishing a wireless LAN connection with the projector 50 can be easily performed.

(Second Embodiment)
An image display system according to a second embodiment of the present invention will be described with reference to the drawings.
Similar to the first embodiment, the image display system 1 of the present embodiment includes a projector 50 and a mobile phone 80, and the schematic configuration of each is the same as that of the first embodiment (see FIG. 2). . However, the projector 50 according to the present embodiment, when generating image data representing the connection information code CC (step S103 in FIG. 3), in order to display the same connection information code CC in different sizes, a plurality of (this book In the embodiment, three large, medium, and small image data are generated, and the size (display size) of the connection information code CC to be displayed is switched every predetermined time.

FIG. 5 is a flowchart for explaining the operation of the projector 50 according to the present embodiment. FIGS. 6A to 6C illustrate the projection image IM based on the three image data generated by the projector 50. FIG.
As shown in FIG. 5, the control unit 55 of the projector 50 receives a wireless LAN connection instruction in step S201, and in step S202, reads connection information of the designated access mode from the storage unit 56 and uses this connection information. After performing the setting based on the projector 50, in step S203, as described above, three pieces of image data representing the connection information code CC are generated and stored in the storage unit 56.

  In step S <b> 204, the control unit 55 reads out one image data (for example, image data that displays the connection information code CC most greatly) from the generated three image data from the storage unit 56, and sends it to the image signal processing unit 60. Output. As a result, an image is projected from the image projection unit 51, and the connection information code CC is displayed in a large size on the screen SC (see FIG. 6A).

  In step S205, the control unit 55 determines whether a connection request command has been received. If a connection request command is received, the process proceeds to step S208. If not received, the process proceeds to step S206.

  When the process proceeds to step S206, the control unit 55 determines whether or not a predetermined time (for example, 5 seconds) has elapsed since the projection of the connection information code CC currently being projected has started. If the predetermined time has elapsed, the process proceeds to step S207, and if the predetermined time has not elapsed, the process returns to step S205.

  When the predetermined time has elapsed without receiving the connection request command and the process proceeds to step S207, the control unit 55 displays the image data of the connection information code CC having a size different from that of the connection information code CC currently being projected. Are read from the storage unit 56 and output to the image signal processing unit 60. Thereby, the display size of the connection information code CC displayed on the screen SC is switched. Thereafter, the process returns to step S205, and step S207 is executed every time a predetermined time (5 seconds) elapses until the connection request command is received, and the size of the connection information code CC displayed on the screen SC is determined. Every predetermined time (5 seconds), it is changed from large → medium → small → large → medium → small (see FIG. 6).

  When the connection request command is received in step S205 and the process proceeds to step S208, the control unit 55 transmits a connection response command permitting connection from the communication unit 63 to the mobile phone 80, and then the first embodiment. The same operation as that (steps S109 to S111 in FIG. 3) is performed (steps S209 to S211).

  In the present embodiment, the control unit 55 changes the size (display size) of the displayed connection information code CC by switching the image data, so that when switching the image data (step S207). The control unit 55 corresponds to the code size changing means of the present invention.

As described above, according to the image display system 1 of the present embodiment, the following effects can be obtained in addition to the effects of the first embodiment.
According to the image display system 1 of the present embodiment, since the control unit 55 of the projector 50 changes the display size of the connection information code CC every predetermined time, the user can set the connection information code CC to a desired display size. The mobile phone 80 only needs to recognize the connection information, and the user does not have to perform an operation of changing the display size.
In this embodiment, since the size of the connection information code CC is changed by switching the image data, it is not necessary to provide the zoom mechanism or the zoom drive unit 62.

(Third embodiment)
An image display system according to a third embodiment of the present invention will be described with reference to the drawings.
FIG. 7 is an explanatory diagram showing a schematic configuration of the image display system 1 of the third embodiment.
As shown in FIG. 7, the image display system 1 of the present embodiment includes a projector 50 having the same configuration as that of the first embodiment as an image display device, and a notebook personal computer (hereinafter referred to as a mobile phone 80) connected thereto. 90 (referred to as a notebook PC) as an image supply device.

FIG. 8 is a block diagram showing a schematic configuration of the image display system 1 of the present embodiment.
As shown in FIG. 8, the projector 50 has the same configuration as that of the first embodiment, and the mobile phone 80 has an interface (I / F) capable of wired data communication with an external device instead of the communication unit 86. The configuration is the same as that of the first embodiment except that the portion 88 is provided.

  The notebook PC 90 includes a control unit 91, a hard disk drive 92, an operation unit 93, a display unit 94, and an interface (I / F) unit 95, and a communication unit 96 and a USB port 97 are connected to the interface unit 95.

  The control unit 91 is configured by a CPU, a ROM, a RAM, and the like, and performs overall control of operations of the units 92 to 95 connected via the bus 98. The hard disk drive 92 is a storage device that stores an OS (Operating System), installed application programs, image data to be projected by the projector 50, and the like. The operation unit 93 is a keyboard, a pointing device, or the like, and outputs an operation signal corresponding to a user operation content to the control unit 91. The display unit 94 includes a liquid crystal display device and the like, and displays an image according to the control of the control unit 91.

  When the notebook PC 90 is turned on, the CPU of the control unit 91 performs a boot process in accordance with the boot program stored in the ROM, reads the OS stored in the hard disk drive 92 into the RAM, and operates the display unit 94. Display the screen (desktop screen). In this state, when the operation unit 93 instructs to start the application program, the control unit 91 reads the application program stored in the hard disk drive 92 into the RAM and performs an operation process according to the program.

  The hard disk drive 92 of the present embodiment includes a connection establishment program PN that defines the processing contents and the order for establishing a wireless LAN connection with an external image display device as an application program. In the connection establishment program PN, a code analysis program for analyzing the connection information code CC included in the image captured by the imaging unit 85 of the mobile phone 80 and recognizing the connection information included in the connection information code CC is a subroutine. Is included. Since the control unit 91 operates according to the code analysis program, it is possible to analyze the captured connection information code CC and recognize the connection information included in the connection information code CC. In this embodiment, the code analysis program The control unit 91 when operating according to the above corresponds to the connection information recognition means of the present invention.

  The communication unit 96 is a wireless LAN module that supports wireless LAN standards such as IEEE 802.11b, IEEE 802.11g, IEEE 802.11a, and the like. Signal transmission or the like can be performed. As the communication unit 96, a wireless LAN card or a wireless LAN adapter that can be connected to a card slot or a USB port may be used.

  The USB port 97 can perform data communication based on the USB standard with an external device. In the present embodiment, the USB port 97 is connected to the interface unit 88 of the mobile phone 80 via the cable UC. Yes.

Next, the operation of the notebook PC 90 will be described.
FIG. 9 is a flowchart for explaining the operation of the notebook PC 90.
When the user operates the operation unit 93 and gives an instruction to start the connection establishment program PN while the power is supplied to the notebook PC, the control unit 91 follows the connection establishment program PN stored in the hard disk drive 92. The display unit 94 displays an image for prompting the user to perform various operations and waits for signal input from the operation unit 93. In this state, the user can give an instruction to start a wireless LAN connection with the projector 50 by performing a predetermined operation using the operation unit 93.

  As shown in FIG. 9, in step S <b> 321, the control unit 91 determines whether or not an instruction for starting a wireless LAN connection has been given based on an operation signal input from the operation unit 93. If an instruction has been given, the process proceeds to step S322. If an instruction has not been given, step S321 is repeated.

  When an instruction to start the wireless LAN connection is made and the process proceeds to step S322, the control unit 91 displays a message on the display unit 94, captures the connection information code CC using the mobile phone 80, and While prompting the transfer of the imaging result, it waits for the imaging result to be input from the mobile phone 80 via the USB port 97.

  When the above message is displayed, the user projects the connection information code CC to a desired size by zooming (steps S105 and S106) in a state where the connection information code CC is projected from the projector 50 onto the screen SC (step S104). In addition, it is necessary to set the mobile phone 80 in the camera mode and capture (record) the projected connection information code CC. Further, when the user performs an operation for transferring the captured image to the notebook PC, image data representing the captured image is output to the notebook PC 90 via the interface unit 88.

  In step S323, the control unit 91 determines whether image data is input from the mobile phone 80. If the image data is input via the USB port 97, the process proceeds to step S324. If the image data is not input, step S323 is repeated.

  When the image data is input and the process proceeds to step S324, the control unit 91 stores the image data in the hard disk drive 92, and executes a code analysis program that is a subroutine of the connection establishment program PN, so that the image data (imaging) The connection information code CC included in the image) is analyzed to recognize the connection information included in the connection information code CC.

  In step S325, the control unit 91 determines whether or not the connection information has been recognized as a result of the analysis of the connection information code CC. If the connection information can be recognized, the process proceeds to step S327. If the connection information cannot be recognized, a message indicating that the recognition has failed is displayed on the display unit 94 (step S326), and step S322 is performed. Return to.

  When the connection information is successfully recognized and the process proceeds to step S327, the control unit 91 performs setting for the wireless LAN connection on the notebook PC 90 based on the recognized connection information.

  In step S328, control unit 91 transmits a connection request command for requesting a wireless LAN connection with projector 50 to projector 50 based on the recognized connection information.

  In step S329, the control unit 91 confirms whether or not a connection response command permitting connection is received from the projector 50. If received, the wireless LAN connection between the projector 50 and the notebook PC 90 is established, and the process proceeds to step S330. On the other hand, if not received, step S329 is repeated.

  In step S330, the control unit 91 reads out image data to be projected by the projector 50 from the hard disk drive 92, and transmits this to the projector 50 from the communication unit 96 as an image signal.

  In step S331, the control unit 91 determines whether an instruction for disconnecting the wireless LAN connection has been given by the user based on the operation signal from the operation unit 93. If there is an instruction, processing for disconnecting the wireless LAN connection such as transmission of a disconnection request command to the projector 50 (step S332) is performed and the process returns to the standby state. On the other hand, if there is no instruction, the process returns to step S330, and the transmission of the image signal is continued.

  As described above, according to the image display system 1 of the present embodiment, the same effects as those of the first embodiment can be obtained.

(Modification)
In addition, you may change embodiment of this invention as follows.
In the first to third embodiments, when the projector 50 generates image data representing the connection information code CC (step S103 and step S203), one connection information code CC is located at the approximate center of the projection image. Such image data is generated, but the display mode of the connection information code CC is not limited to the above. For example, image data such that a plurality of the same connection information codes CC are arranged and displayed may be generated.

FIG. 10 is an explanatory diagram illustrating an example of projecting an image in which two identical connection information codes CC are arranged on the left and right.
As shown in FIG. 10, since the connection information code CC is displayed at different positions (left and right) on the projection image IM, the user who wants to capture the connection information code CC can display the projection image IM (screen SC). Regardless of whether it is located on the left or right, it is possible to image the connection information code CC from a position close to the front. As a result, distortion of the captured image that occurs when imaging from an oblique direction is suppressed, and erroneous recognition of connection information can be reduced.

  Although FIG. 10 shows an example in which two connection information codes CC are arranged on the left and right, three or more may be arranged. Further, the arrangement direction is not limited to the left and right, and a plurality of users may be arranged vertically so that a user who captures the connection information code CC with the mobile phone 80 can capture images while standing or sitting. Alternatively, the connection information codes CC can be arranged in a matrix, that is, in a plurality of rows both vertically and horizontally. The plurality of connection information codes CC are not necessarily displayed at the same time. For example, the connection information codes CC may be displayed at different positions every predetermined time.

  In the first to third embodiments, an example in which connection is made in an ad hoc mode not via an access point is shown as a wireless LAN connection form. However, an access point mode (infrastructure that performs communication via an access point) is shown. The same effect can be obtained when the operation is performed in the mode). Further, the form of the network is not limited to the wireless LAN, and the present invention can be applied to other wireless networks such as a wireless USB and a wired network such as a wired LAN.

  In the first to third embodiments, an image is formed by using the three liquid crystal light valves 53R, 53G, and 53B. However, a configuration in which a color image is formed by one liquid crystal light valve may be employed. Here, the liquid crystal light valve may be either a transmission type or a reflection type. Further, instead of the liquid crystal light valve, it is also possible to use a micromirror array device that modulates the light emitted from the light source by controlling the emission direction of the incident light for each micromirror as a pixel.

  In the second embodiment, three pieces of image data are generated in advance and stored in the storage unit 56, and each time a predetermined time elapses, different image data is read out. You may make it produce | generate every time predetermined time passes.

  In the second embodiment, three image data are generated, and the display size of the connection information code CC is changed by switching these. However, as in the first embodiment, only one image data is generated. Each time a predetermined time elapses, the zoom mechanism may be driven by the zoom drive unit 62 to change the display size of the connection information code CC.

  In the second embodiment, the connection information codes CC of three display sizes are sequentially switched and displayed. However, the switchable display size is not limited to three, and may be two or four or more.

  In the third embodiment, the mobile phone 80 and the notebook PC 90 are connected by the cable UC to perform wired data communication. However, the connection form between the mobile phone 80 and the notebook PC 90 is not limited to the above, and for example, It is also possible to use infrared communication, wireless communication using Bluetooth (registered trademark), or the like. An imaging device such as a digital camera can be used instead of the mobile phone 80.

  In the third embodiment, the mobile phone 80 transmits the captured image data of the connection information code CC to the notebook PC 90, and the notebook PC 90 analyzes the connection information code CC and recognizes the connection information. The cellular phone 80 may recognize the connection information and transmit the recognized connection information to the notebook PC.

  In the first to third embodiments, an example in which the projector 50 is used as an image display device is shown. However, a rear projector integrally provided with a transmissive screen, a CRT (cathode ray tube) display, A liquid crystal display, a plasma display, an SED (Surface-conduction Electron-emitter Display), an organic EL (Electro Luminescence) display, or the like may be used.

  In the first to third embodiments, an example in which a mobile phone 80 or a notebook PC 90 is used as the image supply device is shown. However, the image supply device of the present invention performs network connection to the image display device. Any other portable information device such as a PDA, a digital camera compatible with a wireless LAN, or the like may be used as long as the image signal can be transmitted.

Explanatory drawing which shows schematic structure of the image display system of 1st Embodiment. 1 is a block diagram showing a schematic configuration of an image display system according to a first embodiment. 6 is a flowchart for explaining the operation of the projector according to the first embodiment. The flowchart for demonstrating operation | movement of the mobile telephone of 1st Embodiment. 10 is a flowchart for explaining the operation of the projector according to the second embodiment. (A)-(c) is explanatory drawing which shows the projection image based on three image data which the projector of 2nd Embodiment produces | generates. Explanatory drawing which shows schematic structure of the image display system of 3rd Embodiment. The block diagram which shows schematic structure of the image display system of 3rd Embodiment. The flowchart for demonstrating operation | movement of the notebook PC of 3rd Embodiment. Explanatory drawing which shows the example which projects the image which arranged two connection information codes on right and left.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image display system, 50 ... Projector, 51 ... Image projection part, 52 ... Light source part, 53R, 53G, 53B ... Liquid crystal light valve, 54 ... Projection lens, 55 ... Control part, 56 ... Memory | storage part, 57 ... Operation part , RC ... remote control, 58 ... operation signal receiving unit, 59 ... interface unit, 60 ... image signal processing unit, 61 ... lamp driving unit, 62 ... zoom driving unit, 63 ... communication unit, 64 ... light valve driving unit, 80 ... Mobile phone 81... Control unit 82 82 Storage unit 83 Operation unit 84 Display unit 85 Imaging unit 86 Communication unit 88 Interface unit 90 Notebook PC 91 Control unit 92 Hard disk drive, 93 ... operation part, 94 ... display part, 95 ... interface part, 96 ... communication part, 97 ... USB port, PP, PM, PN ... connection establishment program, CC ... connection Broadcast code, IM ... the projected image, SC ... screen, UC ... cable.

Claims (5)

An image display device that displays an image based on an image signal input from an image supply device via a network,
Storage means for storing connection information for network connection to the image display device;
Encoding means for generating a connection information code in which the connection information is encoded so as to be recognizable by the image supply device;
Display means for displaying an image based on the image signal and displaying the connection information code as an image;
Code size changing means for changing the display size of the connection information code displayed by the display means;
An image display device comprising:   The image display device according to claim 1, wherein the code size changing unit changes a display size of the connection information code every predetermined time.   The image display device according to claim 1, wherein the display unit displays the connection information code at a plurality of positions. An image display system comprising: an image supply device that outputs an image signal; and an image display device that displays an image based on the image signal input from the image supply device via a network,
The image display device includes:
Storage means for storing connection information for network connection to the image display device;
Encoding means for generating a connection information code in which the connection information is encoded so as to be recognizable by the image supply device;
Display means for displaying an image based on the image signal and displaying the connection information code as an image;
Code size changing means for changing the display size of the connection information code displayed by the display means;
Have
The image supply device includes:
Analyzing the connection information code displayed by the display means and recognizing the connection information; connection information recognition means;
Network connection means for performing network connection with the image display device based on the connection information recognized by the connection information recognition means;
An image display system comprising: An image supply device for outputting an image signal;
An image display device that has a display unit and displays an image based on the image signal input from the image supply device via a network by the display unit;
A network connection method for an image display system including:
A first step of generating a connection information code in which the image display device encodes connection information for network connection to the image display device so that the image supply device can recognize the connection information;
A second step in which the image display device displays the connection information code by the display means;
A third step in which the image display device receives an instruction to change a display size of the connection information code;
A fourth step in which the image display device changes a display size of the connection information code based on the instruction received in the third step;
A fifth step in which the image supply device analyzes the connection information code displayed by the display means and recognizes the connection information;
A sixth step in which the image supply device performs network connection with the image display device based on the recognized connection information;
A network connection method for an image display system, comprising:

Images