JP2009192670A - Information processor, image display method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor capable of suppressing an increase in a load when an image is displayed on an external image display device and to provide an image display method and a program. <P>SOLUTION: A CPU extracts and captures an area of a size corresponding to the resolution of the external image display device, centering on a position on which a pointer P is superimposed (hereinafter, it is called "partial image WP") from an image (displayed image) displayed on the screen 16a of a liquid crystal display, and produces image information expressing the partial image WP, when the resolution of the external image display device is lower than that of the liquid crystal display (integrally provided with an image display device). After that, the CPU transmits the produced image information, that is, the image information of the captured image to the external image display device from a wireless LAN device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing apparatus that displays an image on an image display apparatus, an image display method, and a program.

  An information processing apparatus connected to (or integrally provided with) an image display apparatus (first image display apparatus) is connected to an external image display apparatus (second display) that can display a large screen like a projector. If an image display device) is connected, an image based on image information output from the information processing device can be shown to many audiences.

  Patent Document 1 proposes a display device including an enlargement / reduction processing means (scaling means) for changing the resolution of input image information (video signal). If this display device is employed in the second image display device, an image displayed on the first image display device can be displayed even if the first image display device and the second image display device have different resolutions. The entire image can be displayed in a large size on the second image display device.

  In recent years, image information can be transmitted via a network (including a wireless network) or USB (Universal Serial Bus) to simplify temporary connection between an image display device such as a projector and an information processing device. Technology is adopted.

JP 2003-84738 A

  However, since transmission of image information via a network or USB has a slower communication speed than transmission via a video cable (RGB cable), when the resolution of the first image display device is relatively high, that is, the amount of information to be transmitted is small. In many cases, it has been difficult to smoothly reproduce the movement of an image when displaying a moving image or the like. In order to reduce the amount of information to be transmitted when the resolution of the first image display device is higher than that of the second image display device, the image information is output after the information processing device has previously reduced the image. You can do it. However, in this case, since the load increases with the image reduction process, there is a problem that the information processing apparatus needs a high processing capability.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An information processing apparatus according to this application example is an information processing apparatus that displays an image on a first image display apparatus and a second image display apparatus provided externally, and the first image display apparatus A first image information output unit for causing the device to output first image information and display an image based on the first image information; and the resolution of the second image display device is the first image display device When the resolution is lower than the resolution of the first image information, an area having a size corresponding to the resolution of the second image display device is extracted from the image based on the first image information to represent the image included in the area An image extraction unit that generates second image information, and a second image information output that causes the second image display device to output the second image information and display an image based on the second image information. And a section.

  According to this information processing device, when the resolution of the second image display device is lower than the resolution of the first image display device, the image extraction unit selects the second image from the images based on the first image information. An area having a size corresponding to the resolution of the image display device is extracted to generate second image information, and the second image information output unit outputs the second image information to the second image display device. I am doing so. For this reason, the amount of information to be transmitted to the second image display device is reduced by extracting the region, and the processing for reducing the image is not performed, so that an increase in load on the information processing device is suppressed. Is possible. Note that the first image display device may be configured integrally with the information processing device or may be configured externally.

  Application Example 2 In the information processing apparatus according to the application example, it is preferable that the information processing apparatus further includes a region moving unit that changes a position of a region extracted by the image extraction unit.

  According to this information processing device, since the region moving unit that changes the position of the region extracted by the image extracting unit is further provided, the region displayed on the second image display device is not fixed, It is possible to display a desired area in the image displayed on the first image display device on the second image display device.

  Application Example 3 In the information processing apparatus according to the application example described above, it is preferable that the area moving unit changes the position of the area based on a moving operation performed on the pointing device.

  According to this information processing apparatus, since the position of the area is changed based on the moving operation performed on the pointing device, the position of the area can be easily changed.

  Application Example 4 In the information processing apparatus according to the application example described above, it is preferable that the image extraction unit displays a frame surrounding the area on the first image display device.

  According to this information processing device, since the frame surrounding the region extracted by the image extraction unit is displayed on the first image display device, the extracted region, that is, the image displayed on the second image display device is displayed. It can be easily recognized.

  Application Example 5 In the information processing apparatus according to the application example described above, it is preferable that the second image information output unit outputs the second image information to the second image display device via a wireless network. .

  According to this information processing apparatus, since the second image information output unit outputs the second image information via the wireless network, cable connection between the information processing apparatus and the second image display apparatus is unnecessary. Thus, the degree of freedom in layout increases.

  Application Example 6 An image display method according to this application example is an image display method of an information processing apparatus that displays an image on a first image display apparatus and a second image display apparatus provided outside, wherein A first image information output step for outputting first image information to an image display device to display an image based on the first image information; and a resolution of the second image display device is the first image display device. An area having a size corresponding to the resolution of the second image display device is extracted from the image based on the first image information when the resolution is lower than the resolution of the image display device. An image extracting step for generating second image information representing an included image; and a second image display device for outputting the second image information and displaying an image based on the second image information on the second image display device. 2 image information output step And features.

  According to this image display method, when the resolution of the second image display device is lower than the resolution of the first image display device, the resolution of the second image display device is selected from the images based on the first image information. The second image information is generated by extracting a region having a size corresponding to the second image information, and the second image information is output to the second image display device. For this reason, the amount of information to be transmitted to the second image display device is reduced by extracting the region, and the processing for reducing the image is not performed, so that an increase in load on the information processing device is suppressed. Is possible.

  Application Example 7 A program according to this application example is provided in the first image display device, the computer that displays an image on the second image display device provided outside, the first image display device, and the first image display device. A first image information output step of outputting image information and displaying an image based on the first image information; and a case where a resolution of the second image display device is lower than a resolution of the first image display device In addition, second image information representing an image included in the region by extracting a region having a size corresponding to the resolution of the second image display device from the image based on the first image information. And a second image information output step for causing the second image display device to output the second image information and display an image based on the second image information. Let

  According to this program, when the resolution of the second image display device is lower than the resolution of the first image display device, the resolution of the second image display device is selected from the images based on the first image information. The second image information is generated by extracting a region having a predetermined size, and the second image information is output to the second image display device. For this reason, the amount of information to be transmitted to the second image display device is reduced by extracting the region, and the processing for reducing the image is not performed, so that an increase in load on the information processing device is suppressed. Is possible. Note that the first image display device may be configured integrally with the information processing device or may be configured externally.

  Moreover, the said form and the said application example can also be comprised in aspects, such as a recording medium which recorded the said program so that reading with the said computer was possible. Recording media include flexible disks, CD-ROMs, magneto-optical disks, IC cards, ROM cartridges, punch cards, printed matter printed with codes such as bar codes, internal storage devices of information processing devices (memory such as RAM and ROM) ), And an external storage device can be used.

Hereinafter, a personal computer (hereinafter also simply referred to as “computer”) that is the information processing apparatus of the present embodiment will be described.
FIG. 1 is a perspective view showing a computer according to the present embodiment.
As shown in FIG. 1, the computer 1 is a notebook personal computer, and integrally includes a liquid crystal display 16 that is an image display device, a keyboard 20 that is an input device, and a touch pad 21 that is a pointing device. Has been. Further, the computer 1 includes various interfaces, and an external (external) image display device 2 and an external mouse 30 can be connected. Further, the computer 1 can perform network communication with an external device by a wireless LAN (Local Area Network), and wirelessly transmits image information to an image display device 2 that can also perform network communication by a wireless LAN. Can be supplied at. The image display device 2 is, for example, a projector, receives image information supplied from the computer 1, and displays an image corresponding to the image information on the screen (projection plane in the case of a projector) 2a.

FIG. 2 is a block diagram illustrating a circuit configuration of the computer 1.
As shown in FIG. 2, the computer 1 includes a CPU (Central Processing Unit) 11, two bridge circuits (North Bridge 12 and South Bridge 13), a RAM (Random Access Memory) 14, a video controller 15, a liquid crystal display 16, A hard disk drive 17, an optical disk drive 18, a BIOS-ROM (Read Only Memory) 19 in which a BIOS (Basic Input / Output System) is written, a keyboard 20, a touch pad 21, and the like are provided.

  The CPU 11 performs overall control of the operation of the computer 1 by operating according to the BIOS written in the BIOS-ROM 19 or various programs read out to the RAM 14.

  The north bridge 12 performs bridge processing between the CPU 11 and the south bridge 13, control of the RAM 14, control of the video controller 15, and the like. The RAM 14 is configured by a DRAM (Dynamic RAM), and stores an OS (Operating System), an application program, and the like read from the hard disk drive 17. The RAM 14 is used for temporary storage of various data during program execution.

  The video controller 15 controls image display on the liquid crystal display 16. The video controller 15 includes a VRAM (Video RAM) 15a, and sequentially generates image information in units of frames (screens) on the VRAM 15a based on instructions from the CPU 11 that executes the OS and application programs. Is output to the liquid crystal display 16 to display an image based on the image information on the liquid crystal display 16.

  The liquid crystal display 16 includes a transmissive liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates, a backlight unit that emits white light from the back side of the liquid crystal panel, and a drive circuit that drives the liquid crystal panel (both shown in FIG. (Not shown). A large number of pixels arranged in a matrix are formed on the inner surface of the liquid crystal panel. Each pixel includes three sub-pixels that can transmit red (R), green (G), and blue (B) light, and a driving voltage can be applied to the liquid crystal for each sub-pixel. ing. When the drive circuit applies a drive voltage corresponding to the image information input from the video controller 15 to each sub-pixel, each sub-pixel is set to a light transmittance corresponding to the image information. For this reason, the light emitted from the backlight unit is modulated by passing through the liquid crystal panel, and an image corresponding to the image information is displayed on the front side of the liquid crystal panel, that is, the screen 16a of the liquid crystal display 16 (see FIG. 1). Displayed above. The resolution (number of pixels) of the liquid crystal display 16 includes UXGA (1600 × 1200 pixels), SXGA (1280 × 1024 pixels), XGA (1024 × 768 pixels), etc. The corresponding image information is generated and output.

  Various interface circuits are built in the south bridge 13, and a hard disk drive 17, an optical disk drive 18, a BIOS-ROM 19, a keyboard 20, a touch pad 21, a wireless LAN device 22, and the like are connected to the south bridge 13. The hard disk drive 17 stores the installed OS, application programs, various data, and the like. The optical disk drive 18 reads data from an optical disk such as a CD (Compact Disc) or a DVD (Digital Versatile Disc) and writes data to the optical disk.

  The BIOS-ROM 19 stores a BIOS. The BIOS includes programs for controlling input / output devices such as the video controller 15, the hard disk drive 17, the keyboard 20, and the like, as well as programs that are read by the CPU 11 when the computer 1 is started and perform various initialization processes and OS startup. Basic input / output control for these input / output devices is provided to the OS and application programs. The CPU 11 that executes the OS and application programs can perform input / output with these input / output devices directly or via the BIOS.

  The keyboard 20 is an input device for inputting characters, control codes, and the like by key operations, and the touch pad 21 is used for moving or clicking a pointer P (see FIG. 1) displayed on the liquid crystal display 16 or the like. It is a pointing device for performing. The keyboard 20 and the touch pad 21 output an operation signal based on an operation performed by the user to the south bridge 13, and the south bridge 13 transmits the operation signal to the CPU 11 via the north bridge 12.

  The wireless LAN device 22 performs network communication with an external device via a wireless LAN. Similarly, the wireless LAN device 22 performs data communication with the image display device 2 that can perform network communication via the wireless LAN, or communicates with the image display device 2. Image information can be transmitted (output).

  The south bridge 13 includes a USB (Universal Serial Bus) interface (not shown) and can be connected to an external input / output device via a USB terminal 13a. If a mouse 30 as an external pointing device is connected to the USB terminal 13a, the user can perform various operations using the mouse 30 instead of the built-in touch pad 21.

Next, a schematic configuration of the image display device 2 will be described by taking a projector as an example.
FIG. 3 is a block diagram illustrating a schematic configuration of the image display device 2.
As shown in FIG. 3, the image display apparatus 2 includes an image projection unit 40, a control unit 50, an input operation unit 51, a wireless LAN communication unit 52, an image processing unit 53, and the like.

  The image projection unit 40 includes a light source 41, three liquid crystal light valves 42R, 42G, and 42B as a light modulation device, a projection lens 43 as a projection optical system, a light valve drive unit 44, and the like. The image projection unit 40 modulates the light emitted from the light source 41 with the liquid crystal light valves 42R, 42G, and 42B to form an image (image light), and projects the image from the projection lens 43 to project a screen or the like. Display on surface 2a.

  The light source 41 includes a discharge-type light source lamp 41a composed of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 41b that reflects light emitted from the light source lamp 41a toward the liquid crystal light valves 42R, 42G, and 42B. ing. Light emitted from the light source 41 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue that are the three primary colors of light by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 42R, 42G and 42B, respectively.

  The liquid crystal light valves 42R, 42G, and 42B are each configured by a transmissive liquid crystal panel (not shown) in which liquid crystal is sealed between a pair of transparent substrates. Each liquid crystal panel is formed with a plurality of pixels arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel. For the liquid crystal light valves 42R, 42G, and 42B, for example, a liquid crystal panel having a resolution (number of pixels) of 1024 × 768 pixels is used.

  When the light valve driving unit 44 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source 41 is modulated by transmitting through the liquid crystal light valves 42R, 42G, and 42B, and image light corresponding to the image information 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 projection plane 2a by the projection lens 43.

  The control unit 50 includes a CPU, a RAM that is used for temporary storage of various data, a ROM that includes a nonvolatile memory, and the like, and operates according to a control program stored in the ROM so that the operation of the image display device 2 is performed. Take overall control.

  The input operation unit 51 includes a plurality of operation keys for the user to give various instructions to the image display device 2. The operation keys provided in the input operation unit 51 include a “power key” for switching on / off the power, a “menu key” for displaying a setting menu for performing various settings, and the like. When the user operates various operation keys of the input operation unit 51, the input operation unit 51 outputs an operation signal corresponding to the operation content of the user to the control unit 50. The input operation unit 51 may be configured using a remote control (not shown) capable of remote operation. In this case, the remote control transmits an infrared operation signal corresponding to the user's operation content, and a remote control signal receiving unit (not shown) receives this and transmits it to the control unit 50.

  The wireless LAN communication unit 52 is for performing network communication by wireless LAN, and the control unit 50 can transmit and receive control information and the like to and from an external device via the wireless LAN communication unit 52. When the wireless LAN communication unit 52 receives image information, the wireless LAN communication unit 52 outputs the received image information to the image processing unit 53.

  The image processing unit 53 defines the image information input from the wireless LAN communication unit 52 as image information indicating the gradation of each pixel of the liquid crystal light valves 42R, 42G, and 42B, that is, a drive voltage applied to each pixel. Convert to image information. Further, based on an instruction from the control unit 50, processing for adjusting image quality such as brightness, contrast, sharpness, and hue is performed on the converted image information. The image information that has undergone image quality adjustment or the like by the image processing unit 53 is output to the light valve driving unit 44.

  When the light valve driving unit 44 drives the liquid crystal light valves 42R, 42G, and 42B according to the input image information, the liquid crystal light valves 42R, 42G, and 42B form images (image light) corresponding to the image information. An image is projected from the projection lens 43 onto the projection surface 2a.

Next, the operation of the computer 1 will be described with reference to FIG.
When the computer 1 is powered on, the CPU 11 performs boot processing in accordance with the BIOS stored in the BIOS-ROM 19 and starts up the OS stored in the hard disk drive 17 (reads into the RAM 14). Start operation. Then, the CPU 11 acquires information (resolution information) indicating the resolution from the liquid crystal display 16, and instructs the video controller 15 to display a predetermined image (initial screen) on the screen 16a of the liquid crystal display 16. Image information corresponding to the resolution of the liquid crystal display 16 is generated.

  The OS employed in the computer 1 of the present embodiment includes a GUI (Graphical User Interface), and the user operates a pointing device such as the touch pad 21 and the mouse 30 in addition to the keyboard 20. Thus, it is possible to give various instructions to the computer 1.

  When the OS is activated, the CPU 11 instructs the video controller 15 to superimpose and display the pointer P on the image displayed on the liquid crystal display 16. The OS includes a device driver for communicating with the touch pad 21 and the mouse 30, and the CPU 11 can detect a moving operation or a click operation performed on the touch pad 21 or the mouse 30 by the device driver. it can. When a movement operation is performed on the touch pad 21 or the mouse 30, the CPU 11 moves the pointer P by changing the position where the pointer P is superimposed according to the movement operation of the user.

  When the activation of the OS is completed, the computer 1 is in a state where the application program can be activated, and the user can instruct activation of a desired application program by operating the keyboard 20, the touch pad 21, the mouse 30, or the like. it can. When the activation of the application program is instructed, the CPU 11 reads the instructed application program from the hard disk drive 17 into the RAM 14 and starts an operation according to the application program. In the hard disk drive 17 of the present embodiment, as an application program, a word processor for creating a document, spreadsheet software used for counting numerical data, presentation software for creating and displaying a slide for presentation, etc. In addition, an application program (wireless LAN connection tool CT) for transmitting image information and the like by performing wireless LAN connection with the image display device 2 is stored.

  When the user instructs the computer 1 in a state where the OS is activated to start the wireless LAN connection tool CT, the CPU 11 reads the wireless LAN connection tool CT stored in the hard disk drive 17 into the RAM 14 and stores this program in the program. Start following the operation.

  4 and 5 are flowcharts for explaining the operation of the computer 1 based on the wireless LAN connection tool CT. FIGS. 6 to 10 are diagrams for explaining the operation of the computer 1 based on the wireless LAN connection tool CT. It is explanatory drawing. Here, FIGS. 9A to 9D and FIGS. 10A and 10B are views showing a screen 16 a of the liquid crystal display 16 and a screen (projection surface) 2 a of the external image display device 2. When the wireless LAN connection tool CT is activated, the CPU 11 operates according to the flow shown in FIG.

  As shown in FIG. 4, first, the CPU 11 displays a mode selection window W1 (see FIG. 6) on the liquid crystal display 16 to allow the user to select a wireless LAN access mode (step S101). As shown in FIG. 6, in the mode selection window W <b> 1, “ad hoc mode” in which communication is performed one-on-one without using an access point, and “infrastructure” that can be connected to a plurality of image display apparatuses 2 through the access point. “Structure mode” can be selected, and the user can select one of the access modes by clicking the radio button RB provided in the mode selection window W1.

  When the access mode is selected by the user and the OK button B1 provided in the mode selection window W1 is clicked, the CPU 11 searches for the image display device 2 that can be connected to the wireless LAN (step S102). Specifically, the CPU 11 performs broadcasting using the wireless LAN device 22 and sends back each identification name and IP address from the image display apparatus 2 capable of wireless LAN connection to acquire them. Thereafter, the CPU 11 displays a connection window W2 (see FIGS. 7 and 9A) including the search result on the screen 16a of the liquid crystal display 16 (step S103).

  As shown in FIG. 7, in the connection window W2, a list DL of the searched image display devices 2 is displayed. In this list DL, in addition to the connection status (status) of each image display device 2, The acquired identification name and IP address are included. The list DL is provided with a check box CB for each searched image display device 2, and the user designates the image display device 2 to be connected by clicking the check box CB. be able to. When the ad hoc mode is selected as the access mode, the user can designate only one image display device 2, and when the infrastructure mode is selected as the access mode, the user A plurality of image display devices 2 can be designated. A connection button B2 is provided at the lower right of the connection window W2, and the user clicks the connection button B2 after designating the image display device 2 to be connected to the designated image display device 2. Wireless LAN connection.

  When the connection button B2 is clicked by the user and the CPU 11 detects this operation, the CPU 11 operates according to the flow shown in FIG.

  As shown in FIG. 5, in step S <b> 111, the CPU 11 executes a wireless LAN connection with the designated image display device 2. Specifically, the CPU 11 transmits a connection request command from the wireless LAN device 22 to the designated image display device 2. In response to the connection request command, the image display device 2 transmits a connection response command for permitting connection to the computer 1. When the wireless LAN device 22 of the computer 1 receives the command, the image display device 2 communicates with the computer 1 and the image display device 2. A wireless LAN connection is established.

  In step S112, the CPU 11 instructs the video controller 15 to delete the connection window W2 from the screen 16a and display the tool bar W3 (see FIGS. 8 and 9B) on the screen 16a. As shown in FIG. 8, the toolbar W3 includes a disconnect button B3 for disconnecting the wireless LAN connection as well as various buttons for controlling the display state of the image display device 2.

  Next, in step S113, the CPU 11 requests the image display apparatus 2 connected to the wireless LAN to output information representing the resolution (resolution information) via the wireless LAN device 22, and sends a reply from the image display apparatus 2. Resolution information to be obtained is acquired via the wireless LAN device 22. The resolution information may be acquired together with the identification name and IP address when searching the image display device 2 in step S102.

  In step S <b> 114, the CPU 11 compares the resolution of the image display device 2 with the resolution of the liquid crystal display 16 and determines whether or not the resolution of the image display device 2 is lower than the resolution of the liquid crystal display 16. If the resolution of the image display device 2 is lower than the resolution of the liquid crystal display 16, the process proceeds to step S118. If the resolution of the image display device 2 is the same as or higher than the resolution of the liquid crystal display 16, step S118 is performed. The process proceeds to S115. When the computer 1 is connected to a plurality of image display apparatuses 2 by wireless LAN, the resolution is compared with the image display apparatus 2 having the lowest resolution among them.

  When the resolution of the image display device 2 is the same as or higher than the resolution of the liquid crystal display 16 and the process proceeds to step S115, the CPU 11 displays an image displayed on the liquid crystal display 16 (hereinafter referred to as “display image”). .) Is captured, and in the subsequent step S116, the image information of the captured image is transmitted from the wireless LAN device 22 to the image display apparatus 2. As a result, as shown in FIG. 9C, on the screen 2a of the image display device 2, an image corresponding to the image information transmitted from the computer 1, that is, an image displayed on the screen 16a of the liquid crystal display 16 is displayed. A substantially identical image is displayed. The wireless LAN connection tool CT is configured to capture an image that does not include the pointer P and the toolbar W3, and the pointer P and the toolbar W3 are not displayed on the screen 2a of the image display device 2.

  Thereafter, the user can display a desired image W4 on the screen 16a of the liquid crystal display 16, as shown in FIG. When the image W4 is displayed on the liquid crystal display 16, the entire range of the image W4 is also displayed on the screen 2a of the image display device 2. The operation for displaying the image W4 may be performed before starting the wireless LAN connection tool CT. The tool bar W3 is always set to be displayed in the foreground. Even when the image W4 is displayed on the full screen after the tool bar W3 is displayed, the tool bar W3 is displayed on the screen 16a of the liquid crystal display 16. Never hide in W4.

  In step S117, the CPU 11 determines whether or not the user has clicked the disconnect button B3 on the toolbar W3. If the cut button B3 is clicked, the process proceeds to step S121. If the cut button B3 is not clicked, the process returns to step S115 to capture the entire display image and transmit image information. continue.

  On the other hand, when the resolution of the image display device 2 is lower than the resolution of the liquid crystal display 16 in step S114 and the process proceeds to step S118, the CPU 11 superimposes the pointer P on the display image displayed on the liquid crystal display 16. An area having a size corresponding to the resolution of the image display device 2 (hereinafter referred to as “partial image”) is extracted and captured with the position being at the center, and image information representing the partial image is generated. If the computer 1 is connected to a plurality of image display devices 2 by wireless LAN, a partial image having a size corresponding to the resolution of the image display device 2 having the lowest resolution is extracted. In subsequent step S119, the CPU 11 transmits the generated image information, that is, the image information of the captured image, from the wireless LAN device 22 to the image display device 2.

  For example, as shown in FIG. 10A, when the resolution of the liquid crystal display 16 is 1600 × 1200 pixels and the resolution of the image display device 2 is 1024 × 768 pixels, an image W4 is displayed on the screen 16a of the liquid crystal display 16. Is displayed, a partial image WP of 1024 × 768 pixels centering on the position where the pointer P is superimposed is extracted from the image W4, and this partial image WP is displayed on the screen 2a of the image display device 2. Is displayed.

  In step S120, the CPU 11 determines whether or not the user has clicked the disconnect button B3 on the toolbar W3. If the cut button B3 is clicked, the process proceeds to step S121. If the cut button B3 is not clicked, the process returns to step S118 to capture the partial image WP and transmit the image information. continue.

  Thus, in this embodiment, since the partial image WP is extracted centering on the position where the pointer P is superimposed, the user performs a moving operation on the touch pad 21 or the mouse 30, thereby causing the image display device 2 to move. The position of the area to be displayed can be changed (see FIG. 10B). That is, the extracted partial image WP moves in the display image so as to follow the pointer P displayed on the liquid crystal display 16. When the pointer P is in the vicinity of the peripheral edge of the display image and the partial image WP protrudes outside the display image, the protruding area may be filled with black or the like, or the partial image WP However, the partial image WP may not follow the pointer P at the periphery of the display image so that the image does not protrude from the display image. Further, the position of the partial image WP with respect to the display image may be fixed when a predetermined operation by the user, for example, a predetermined key operation (hot key operation) on the keyboard 20 is performed. Further, as shown by broken lines in FIGS. 10A and 10B, if a frame surrounding the partial image WP is displayed on the screen 16a of the liquid crystal display 16, even when only the screen 16a is viewed. The area (partial image WP) displayed on the screen 2a can be easily recognized.

  When the disconnect button B3 is clicked in step S117 or step S120 and the process proceeds to step S121, the CPU 11 stops transmitting image information to the image display device 2 and establishes a wireless LAN connection with the image display device 2. In order to disconnect, the wireless LAN device 22 transmits a disconnection request command to the image display apparatus 2 connected to the wireless LAN. After the image display apparatus 2 performs a predetermined disconnection process in response to the disconnection request command, a disconnection completion command indicating that the process is completed is transmitted to the computer 1, and the wireless LAN device 22 of the computer 1 receives the disconnection completion command. Then, the wireless LAN connection between the computer 1 and the image display device 2 is disconnected.

  Thereafter, in step S122, the CPU 11 instructs the video controller 15 to delete the tool bar W3 from the screen 16a of the liquid crystal display 16, and to display the connection window W2 again on the screen 16a (FIG. 9A). See), and end the flow. In a state where the connection window W2 is displayed, the user can perform a new wireless LAN connection by designating the image display device 2 and clicking the connection button B2. If the user clicks the end button BE (see FIG. 7) provided on the upper right of the connection window W2, the CPU 11 ends the wireless LAN connection tool CT.

  As described above, according to the computer 1 of the present embodiment, the following effects can be obtained.

  (1) According to the computer 1 of this embodiment, when the resolution of the image display device 2 is lower than the resolution of the liquid crystal display 16, the resolution of the image display device 2 is selected from the display images displayed on the liquid crystal display 16. A partial image WP having a size corresponding to the image is extracted, and image information of the partial image WP is transmitted to the image display device 2. For this reason, the amount of information to be transmitted to the image display device 2 is reduced as compared with the case where image information of the entire display image is transmitted, and the processing for reducing the image is not performed. The increase can be suppressed. Further, since image information of high resolution (resolution exceeding the resolution of the image display device 2) is not input to the image display device 2, it is not necessary to provide the image display device 2 with a function for reducing the image. The configuration of the image display device 2 can be simplified. Further, since neither the computer 1 nor the image display device 2 has reduced the image, there is no deterioration of the image due to the reduction process.

  (2) According to the computer 1 of the present embodiment, since the position of the partial image WP displayed on the image display device 2 can be changed, the displayed area is not fixed, and the desired in the display image This area can be displayed on the image display device 2.

  (3) According to the computer 1 of the present embodiment, since the partial image WP is moved based on the moving operation performed on the pointing device such as the touch pad 21 or the mouse 30, the partial image WP can be easily moved. It becomes possible.

  (4) According to the computer 1 of the present embodiment, image information is output via a wireless network (wireless LAN), so that cable connection between the computer 1 and the image display device 2 is not required, and the layout can be freely set. The degree increases.

In the present embodiment, the liquid crystal display 16 corresponds to the first image display device, and the external image display device 2 corresponds to the second image display device. Also, the image information output from the video controller 15 to the liquid crystal display 16 corresponds to the first image information, and the image information transmitted from the wireless LAN device 22 to the image display device 2 by the wireless LAN is the second image information. Equivalent to. The video controller 15 that outputs image information to the liquid crystal display 16 corresponds to a first image information output unit, and the wireless LAN device 22 that transmits image information to the image display device 2 corresponds to a second image information output unit. To do. Further, the CPU 11 when extracting the partial image WP having a size corresponding to the resolution of the image display device 2 from the display image and generating image information representing the partial image WP, that is, the CPU 11 when executing step S118. It corresponds to an image extraction unit. Further, the CPU 11 when changing the position of the partial image WP according to the movement operation of the pointing device such as the touch pad 21 or the mouse 30, that is, the position of the partial image WP centered on the position where the pointer P is superimposed in step S118. The CPU 11 for setting the position corresponds to the area moving unit.
(Modification)
In addition, you may change the said embodiment as follows.

In the embodiment, the position of the partial image WP is changed so as to follow the pointer P by the movement operation of the pointing device (touch pad 21 or mouse 30). However, in order to change the position of the partial image WP. The means is not limited to this embodiment. For example, as shown in FIG. 11, the toolbar W3 is provided with four buttons BD for moving the partial image WP up, down, left, and right, and each time the button BD is clicked, a predetermined direction is set in a corresponding direction. The partial image WP may be moved by an amount (pixel). Further, when a predetermined key operation (operation of four hot keys corresponding to up, down, left, and right) is performed on the keyboard 20, the partial image WP may be moved according to the operation.
Also, as shown in FIG. 12, a frame-like window W5 that can be displayed through a region (partial image WP) having a size (number of pixels) according to the resolution of the image display device 2 is displayed on the screen 16a of the liquid crystal display 16. The position of the partial image WP may be changed by moving the frame-like window W5 by a drag operation (moving operation while clicking) or the like.

  In the above-described embodiment, a configuration in which image information is output from the computer 1 to the image display device 2 via a wireless network is shown, but the same effect can be obtained even in a configuration in which output is performed via a wired network or USB. Is possible.

  In the embodiment, the mode in which the pointer P is not displayed on the image display device 2 is shown, but an image (image information) including the pointer P is displayed on the image display device 2 in order to display the pointer P on the image display device 2. You may make it transmit. Further, it is possible to adopt a configuration in which a state in which the pointer P is displayed and a state in which the pointer P is not displayed can be switched by a hot key operation or a click operation of a predetermined button (not shown) provided on the toolbar W3.

  In the embodiment, as an example of the information processing apparatus, a notebook personal computer integrally provided with an image display device (liquid crystal display 16), an input device (keyboard 20), and a pointing device (touch pad 21) has been described. The information processing apparatus is not limited to a notebook personal computer. For example, an information processing apparatus (computer) having a configuration in which all or part of an image display device, an input device, and a pointing device are externally attached, such as a desktop personal computer, may be used.

  In the above-described embodiment, an example in which a projector is used as the external image display device 2 has been described. However, a rear projector integrally provided with a transmissive screen, a liquid crystal display, a plasma display, a surface-conduction electron (SED), or the like. It is also possible to use an emitter display), an organic EL (Electro Luminescence) display, or the like.

  In the above embodiment, the touch pad 21 and the mouse 30 are used as the pointing device. However, other pointing devices such as a trackball, a joystick, and a pen tablet can be used.

The perspective view which shows the computer which concerns on embodiment. The block diagram which shows the circuit structure of a computer. 1 is a block diagram showing a schematic configuration of an image display device. The flowchart for demonstrating operation | movement of the computer based on a wireless LAN connection tool. The flowchart for demonstrating operation | movement of the computer based on a wireless LAN connection tool. Explanatory drawing for demonstrating operation | movement of the computer based on a wireless LAN connection tool. Explanatory drawing for demonstrating operation | movement of the computer based on a wireless LAN connection tool. Explanatory drawing for demonstrating operation | movement of the computer based on a wireless LAN connection tool. (A)-(d) is explanatory drawing for demonstrating operation | movement of the computer based on a wireless LAN connection tool, and is a figure which shows the screen (projection surface) of the screen of a liquid crystal display, and an external image display apparatus. (A), (b) is explanatory drawing for demonstrating operation | movement of the computer based on a wireless LAN connection tool, and is a figure which shows the screen (projection surface) of the screen of a liquid crystal display, and an external image display apparatus. Explanatory drawing for demonstrating operation | movement of the computer based on the wireless LAN connection tool which concerns on a modification. It is explanatory drawing for demonstrating operation | movement of the computer based on the wireless LAN connection tool which concerns on a modification, and is a figure which shows the screen (projection surface) of the screen of a liquid crystal display, and an external image display apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Computer, 2 ... Image display apparatus, 2a ... Screen (projection surface), 11 ... CPU, 12 ... North bridge, 13 ... South bridge, 13a ... USB terminal, 14 ... RAM, 15 ... Video controller, 15a ... VRAM, DESCRIPTION OF SYMBOLS 16 ... Liquid crystal display, 16a ... Screen, 17 ... Hard disk drive, 18 ... Optical disk drive, 19 ... BIOS-ROM, 20 ... Keyboard, 21 ... Touchpad, 22 ... Wireless LAN device, 30 ... Mouse, 40 ... Image projection part, DESCRIPTION OF SYMBOLS 41 ... Light source, 42R, 42G, 42B ... Liquid crystal light valve, 43 ... Projection lens, 44 ... Light valve drive part, 50 ... Control part, 51 ... Input operation part, 52 ... Wireless LAN communication part, 53 ... Image processing part, CT: Wireless LAN connection tool, P: Pointer, W1: Mode selection window, W2: Connection window Cormorant, W3 ... toolbar, WP ... partial image.

Claims (7)

An information processing device for displaying an image on a first image display device and a second image display device provided outside,
A first image information output unit for outputting first image information to the first image display device to display an image based on the first image information;
When the resolution of the second image display device is lower than the resolution of the first image display device, a size corresponding to the resolution of the second image display device is selected from the images based on the first image information. An image extraction unit that extracts the region and generates second image information representing an image included in the region;
A second image information output unit that causes the second image display device to output the second image information and display an image based on the second image information;
An information processing apparatus comprising: The information processing apparatus according to claim 1,
An information processing apparatus, further comprising: an area moving unit that changes a position of an area extracted by the image extracting unit. An information processing apparatus according to claim 2,
The information processing apparatus, wherein the region moving unit changes the position of the region based on a moving operation performed on a pointing device. The information processing apparatus according to any one of claims 1 to 3,
The information processing apparatus, wherein the image extraction unit displays a frame surrounding the area on the first image display apparatus. The information processing apparatus according to any one of claims 1 to 4,
The information processing apparatus, wherein the second image information output unit outputs the second image information to the second image display apparatus via a wireless network. An image display method of an information processing apparatus for displaying an image on a first image display device and a second image display device provided outside,
A first image information output step of causing the first image display device to output first image information and displaying an image based on the first image information;
When the resolution of the second image display device is lower than the resolution of the first image display device, the resolution according to the resolution of the second image display device is selected from the images based on the first image information. An image extraction step of extracting a region of a size and generating second image information representing an image included in the region;
A second image information output step of causing the second image display device to output the second image information and display an image based on the second image information;
An image display method comprising: A computer for displaying an image on a first image display device and a second image display device provided outside;
A first image information output step of causing the first image display device to output first image information and displaying an image based on the first image information;
When the resolution of the second image display device is lower than the resolution of the first image display device, the resolution according to the resolution of the second image display device is selected from the images based on the first image information. An image extraction step of extracting a region of a size and generating second image information representing an image included in the region;
A second image information output step of causing the second image display device to output the second image information and display an image based on the second image information;
A program for running

Images