WO2013186933A1 - Display device, and display method - Google Patents

Display device, and display method Download PDF

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Publication number
WO2013186933A1
WO2013186933A1 PCT/JP2012/065432 JP2012065432W WO2013186933A1 WO 2013186933 A1 WO2013186933 A1 WO 2013186933A1 JP 2012065432 W JP2012065432 W JP 2012065432W WO 2013186933 A1 WO2013186933 A1 WO 2013186933A1
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WO
WIPO (PCT)
Prior art keywords
image
display
video signal
function
screen
Prior art date
Application number
PCT/JP2012/065432
Other languages
French (fr)
Japanese (ja)
Inventor
雅彦 石井
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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Application filed by Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2012/065432 priority Critical patent/WO2013186933A1/en
Publication of WO2013186933A1 publication Critical patent/WO2013186933A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/02—Networking aspects
    • G09G2370/027—Arrangements and methods specific for the display of internet documents

Definitions

  • the present invention relates to a display device and a display method suitable for use in configuring a multi-display system.
  • Some displays have a screen saver function as a single display function.
  • the screen saver function is to move a displayed image in the horizontal and vertical directions at regular intervals, for example, to prevent burn-in of the display screen (see, for example, Patent Document 1).
  • a multi-display system that displays images using a plurality of displays, which can enlarge and display an image of one screen using a plurality of displays.
  • Such a system can be configured, for example, by providing each display with a function for supporting multiple displays. That is, in such a system, for example, each display is provided with a function of displaying a part of the area in one screen based on the video signal on the entire screen. Further, it is possible to select an area to be displayed for each display on each display. Further, the displays are placed close to each other in a predetermined arrangement, and the same video signal is input to each display. Then, by displaying each preset one-part area on the entire screen on each display, it is possible to enlarge and display one screen image using a plurality of displays.
  • FIGS. 6 to 8 are drawings created by the present applicant in order to explain the problems of the present invention.
  • FIG. 6 is an explanatory diagram for explaining the operation of the screen saver function.
  • FIG. 7 is an explanatory diagram for explaining an example of operating the screen saver function when a multi-display system is configured with four displays.
  • FIG. 8 is an explanatory diagram for explaining another example of operating the screen saver function when a multi-display system is configured with four displays.
  • FIG. 6B shows a display example when the screen saver function is operated on the display 10 using the screen saver image 20 shown in FIG.
  • the screen saver image 20 is an image including a rectangular image at the center of the background image.
  • the screen saver image 20 for example, the display image immediately before the start of the operation of the screen saver function is used as it is by adjusting the brightness thereof, and can be a dedicated image prepared for the screen saver function in advance.
  • the images displayed on the display 10 as shown in FIG. 6B are the image 21, the image 22, the image 23, the image 24, The image 21 changes as follows. In each of the images 20 to 24, a center line is indicated by a one-dot chain line.
  • FIG. 7 shows an example of a change in the display screen when the screen saver function is operated in the case where the multi-display system is configured by using four displays 10 shown in FIG.
  • four displays 10 a, 10 b, 10 c, and 10 d having the same configuration as the display 10 are arranged in the upper left, lower left, lower right, and upper right.
  • the display 10a displays the image of the upper left partial area 201 in the image 20 of FIG.
  • the display 10b displays the image of the lower left partial area 202 in the image 20 of FIG.
  • the display 10c displays the image of the lower right partial area 203 in the image 20 of FIG.
  • the display 10d displays the image of the upper right partial area 204 in the image 20 of FIG.
  • the image displayed on the display 10a changes to an image 31a, an image 32a, an image 33a, an image 34a, an image 31a
  • the image displayed on the display 10b changes to an image 31b, an image 32b, an image 33b, an image 34b, an image 31b
  • the image displayed on the display 10c changes to an image 31c, an image 32c, an image 33c, an image 34c, an image 31c
  • the image displayed on the display 10d changes to an image 31d, an image 32d, an image 33d, an image 34d, an image 31d,.
  • the images 31a, 31b, 31c, and 31d are images displayed simultaneously.
  • Images 32a, 32b, 32c, and 32d are images that are displayed simultaneously.
  • Images 33a, 33b, 33c, and 33d are images that are displayed simultaneously.
  • the images 34a, 34b, 34c, and 34d are images that are displayed simultaneously.
  • the images enlarged and displayed on the four displays 10a, 10b, 10c, and 10d are similar to the images 21, 22, 23, and 24 shown in FIG. That is, the images formed by the four displays 10a, 10b, 10c, and 10d are correctly displayed as one image. In this case, the operation timing and the operation direction of the image display operation are synchronized between the displays 10a, 10b, 10c and 10d.
  • FIG. 8 shows another example of the change in the display screen when the screen saver function is operated when the multi-display system is configured by using the four displays 10 shown in FIG. Yes.
  • the configuration, arrangement, display area and the like of the four displays 10a, 10b, 10c and 10d are the same as those shown in FIG.
  • the operation timing and the operation direction of the image display operation are not synchronized between the displays 10a, 10b, 10c, and 10d. Therefore, the images formed by the four displays 10a, 10b, 10c, and 10d are not correctly displayed as one image.
  • the image displayed on the display 10a changes to an image 41a, an image 42a, an image 43a, an image 44a, an image 41a
  • the image displayed on the display 10b changes to an image 41b, an image 42b, an image 43b, an image 44b, an image 41b
  • the image displayed on the display 10c changes to an image 41c, an image 42c, an image 43c, an image 44c, an image 41c
  • the image displayed on the display 10d changes to an image 41d, an image 42d, an image 43d, an image 44d, an image 41d,.
  • the images 41a, 41b, 41c and 41d are images displayed simultaneously.
  • Images 42a, 42b, 42c, and 42d are images that are displayed simultaneously.
  • Images 43a, 43b, 43c, and 43d are images that are displayed simultaneously.
  • the images 44a, 44b, 44c, and 44d are images that are displayed simultaneously.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a display device and a display method that can solve the above-described problems.
  • a display device includes a first function unit that inputs a video signal and displays a partial image in the image based on the video signal in an enlarged manner in cooperation with another display device; When moving both the second functional unit that displays the first image while moving the first functional unit and the first functional unit and the second functional unit, the movement status of the first image by the second functional unit is determined. And a signal processing circuit that writes a predetermined code to be displayed in the blanking period of the video signal and outputs the code to the other display device.
  • the display method of the present invention also includes a first function for inputting a video signal and enlarging and displaying a partial image in the image based on the video signal in cooperation with another display device, and moving a predetermined first image.
  • the predetermined code indicating the movement status of the first image (for example, screen saver image) by the second function (for example, screen saver function) is written in the blanking period of the video signal and output to another display device. . Therefore, the other display device can easily display the first image in synchronization with the movement state of the first image in the display device in which the predetermined code is written by reading the predetermined code. Therefore, even when a magnified image is displayed using a plurality of display devices, it is possible to prevent a shift in the movement direction and movement timing of the first image between the plurality of display devices.
  • FIG. 1 It is the block diagram which showed the example of a structure of one Embodiment of the display apparatus by this invention. It is the figure which showed an example of the data format of the digital video signal input into the display apparatus 1 of FIG. It is the figure which showed the other example of the data format of the digital video signal input into the display apparatus 1 of FIG. 3 is a flowchart illustrating an operation example of the display device 1 of FIG. 1. It is a figure for demonstrating an example of the multi-display system comprised using multiple display apparatuses 1 of FIG. It is the figure which showed the operation example of the screen saver function. It is the figure which showed the operation example of the screen saver function in a multi-display system. It is the figure which showed the other operation example of the screen saver function in a multi-display system.
  • the display 1 shown in FIG. 1 includes an LCD (Liquid Crystal Display) 11, a signal processing circuit 12, a CPU (Central Processing Unit) 13, an operation unit 14, an input terminal 15, and an output terminal 16.
  • LCD Liquid Crystal Display
  • CPU Central Processing Unit
  • operation unit 14 an input terminal 15, and an output terminal 16.
  • the LCD 11 has a liquid crystal panel and a drive circuit thereof.
  • the LCD 11 displays an image based on the control signal supplied from the signal processing circuit 12.
  • the signal processing circuit 12 transmits and receives a predetermined control signal to and from the CPU 13, detects a signal from the digital video signal input from the input terminal 15, decodes the digital video signal, adjusts the image quality of the image indicated by the digital video signal, A scaling process or the like is performed to generate a predetermined control signal and supply it to the LCD 11.
  • the signal processing circuit 12 is a digital signal processing device that includes peripheral devices such as a volatile and nonvolatile memory, a digital video signal input / output circuit, and a general-purpose input / output circuit in addition to an arithmetic device.
  • the signal processing device 12 performs a predetermined process using internal hardware by executing a program stored in an internal nonvolatile memory.
  • the signal processing circuit 12 further has a function of writing a screen saver code in the blanking period of the digital video signal and outputting it from the output terminal 16.
  • the signal processing circuit 12 also has a volatile frame memory for a plurality of frames and a non-volatile frame memory for storing a predetermined image.
  • the screen saver image Is provided (hereinafter referred to as a screen saver function).
  • the screen saver function is a function for displaying a predetermined screen saver image on the screen of the LCD 11 while moving it. For example, the screen saver function does not start when the user performs a predetermined operation on the operation unit 15, or a predetermined change does not occur in the video signal in the digital video signal input to the signal processing circuit 12. Or start the operation.
  • the signal processing circuit 12 constitutes a multi-display system together with a plurality of other display devices 1 having the same configuration while transmitting / receiving a predetermined control signal to / from the CPU 13 and enlarges and displays a video (hereinafter referred to as a function) Called a multi-screen display function).
  • a function a video (hereinafter referred to as a function) Called a multi-screen display function).
  • the multi-screen display function is also called a tile matrix function or the like. That is, the signal processing circuit 12 is a functional unit that implements the above functions.
  • the screen saver code is expressed by encoding the moving direction, moving amount, moving timing, etc. of the display image for the screen saver in units of frames (or in units of predetermined plural frames) when the screen saver function is operated on the display device 1.
  • Data the display image for the screen saver is an image obtained by moving a predetermined initial image for the screen saver over time.
  • the initial screen saver image is an image stored in advance in a predetermined storage device in the display device 1 (that is, the signal processing circuit 12 or the like), or the brightness or the like of the image immediately before the screen saver function is operated is adjusted. Or an image.
  • the moving direction and the moving amount of the display image for the screen saver are, for example, upper, upper right, right, lower right, lower, lower left, left, upper left, etc. on the basis of one frame before (or a plurality of predetermined frames before).
  • Information representing a predetermined direction and information representing the amount of movement in that direction are represented using encoded data. However, if the movement amount is always set to a constant value, it can be omitted.
  • the encoded data is obtained by converting the movement direction such as upper, upper right, and right into numerical information such as 1, 2, 3, and the like.
  • the movement timing is, for example, information indicating that an image is moved or not moved with reference to one frame before (or a plurality of predetermined frames before) in the frame, encoded data (for example, “1” or “ 0 "). That is, the screen saver code is information for indicating the movement state of the screen saver display image with reference to the image before movement (or using the difference between the image after movement and the image before movement). If the display image for the screen saver and the screen saver code are known, the display image for the screen saver to be displayed in each frame can be obtained.
  • the CPU 13 is a semiconductor information processing device also called a microcontroller or the like, and includes peripheral devices such as a volatile and nonvolatile memory, a general-purpose input / output circuit, and a serial signal input / output circuit in addition to an arithmetic device.
  • the CPU 13 performs a predetermined process using internal hardware by executing a program stored in the internal nonvolatile memory. For example, the CPU 13 transmits and receives a predetermined control signal to and from the signal processing circuit 12 to set a predetermined parameter according to the operation of the operation unit 14 while displaying a predetermined setting screen on the LCD 11. For example, the CPU 13 sets a plurality of parameters used in the screen saver function and the multi-screen display function in accordance with the operation of the operation unit 14.
  • the operation unit 14 is an input device for inputting an instruction from the user, and includes a push button, a cursor key, and a detection circuit for them. The user performs various settings by performing a predetermined operation on the operation unit 14. Information representing the operation content detected by the operation unit 14 is output to the CPU 13. Note that the operation unit 14 may further include a receiving device for a remote control device, and may perform various input operations using wireless signals.
  • the input terminal 15 is a terminal to which a predetermined format digital video signal cable is connected.
  • the input terminal 15 inputs a digital video signal input via the connected digital video signal cable to the signal processing circuit 12.
  • the output terminal 16 is a terminal to which a predetermined format digital video signal cable is connected.
  • the output terminal 16 outputs the digital video signal output from the signal processing circuit 12 via the connected digital video signal cable.
  • FIG. 2 is a diagram illustrating an example of a data format of a digital video signal input from, for example, an external signal source.
  • FIG. 3 is a diagram showing an example of the data format of the digital video signal in which the screen saver code C is written in the display device 1 of the present embodiment with respect to the digital video signal shown in FIG.
  • the digital video signal shown in FIG. 2 is an area corresponding to a video signal portion M that is an area for storing a video signal for one frame (that is, one screen) and a blanking period for each frame (that is, a horizontal blanking period)
  • the blanking period portion B is a set, and these are repeatedly included.
  • the blanking period portion B includes a video synchronization signal S for synchronizing video display in units of frames.
  • the digital video signal shown in FIG. 3 is configured by repeatedly including a video signal part M and a blanking period part B as a set, similarly to FIG.
  • the digital video signal shown in FIG. 3 includes a screen saver code C in the blanking period portion B, unlike FIG.
  • the screen saver code C is written by the signal processing circuit 12. At that time, the video signal portion M and the video synchronization signal S are not particularly changed before and after the screen saver code C is written.
  • FIG. 4 is a flowchart for explaining an operation example of the display device 1 shown in FIG.
  • the processing shown in FIG. 4 is executed by the signal processing circuit 12 (or by the signal processing circuit 12 and the CPU 13) during the operation of the screen saver function.
  • the signal processing circuit 12 executes.
  • the multi-display system 100 shown in FIG. 5A includes four displays (1) 1a, a display (2) 1b, a display (3) 1c, and a display (shown in the same configuration as the display device 1 shown in FIG. 4) It is configured using 1d.
  • the display (1) 1a, the display (2) 1b, the display (3) 1c, and the display (4) 1d are located on the upper left, lower left, lower right, and upper right toward the display screen. They are installed in a positional relationship. Further, in the display (1) 1a, the display (2) 1b, the display (3) 1c, and the display (4) 1d, digital video signals are transmitted in the order indicated by numbers in parentheses.
  • a signal source 2 for generating a digital video signal and a display (1) 1a are connected via a cable 3a.
  • the cable 3a connected to the signal source 2 is connected to the input terminal of the display (1) 1a (corresponding to the input terminal 15 in FIG. 1, the same applies hereinafter).
  • the output terminal of the display (1) 1a (corresponding to the output terminal 16 of FIG. 1; the same applies hereinafter) and the input terminal of the display (2) 1b are connected by a cable 3b.
  • the output terminal of the display (2) 1b and the input terminal of the display (3) 1c are connected by a cable 3c.
  • the output terminal of the display (3) 1c and the input terminal of the display (4) 1d are connected by a cable 3d.
  • the operation example shown in FIG. 4 is an operation in the case where the screen saver function and the multi-screen display function are simultaneously operated on each display (1) 1a, (2) 1b, (3) 1c, and (4) 1d. It is an example. However, the screen saver function and the multi-screen display function are executed after presetting a plurality of parameters as follows.
  • a parameter indicating the fact is set for the display device 1 to which a digital video signal is input directly (or first) from the external signal source 2.
  • the display device 1 to which a digital video signal is directly input from the external signal source 2 is set as “primary”.
  • All other display devices 1 that is, the display device 1 to which the digital video signal is input from the other display device 1) are set as “secondary”.
  • the display (1) 1a is “primary”
  • the other displays (2) 1b, (3) 1c, and (4) 1d are “secondary”.
  • the user performs a predetermined operation on the operation unit 14 before operating the screen saver function, and sets a parameter of “primary” or “secondary” in each display device 1.
  • a parameter indicating that the multi-screen display function is operated for a plurality of display devices 1 constituting the multi-display system, a parameter indicating the number of display devices 1, and the own device are arranged.
  • a parameter that represents the position being set is set in advance.
  • all of the displays (1) 1a, (2) 1b, (3) 1c and (4) 1d are “operating the multi-screen display function” and the number is “4”.
  • the display (1) 1a is “upper left”
  • the display (2) 1b is “lower left”
  • the display (3) 1c is “lower right”
  • the display (1) 1a the partial image of the rectangular area in the upper left quarter of the image in one screen indicated by the digital video signal is displayed on the full screen.
  • the display (2) 1b the partial image of the rectangular area in the lower left quarter of the image in one screen indicated by the digital video signal is displayed on the full screen.
  • the display (3) 1c the partial image of the rectangular region in the lower right quarter of the image in one screen indicated by the digital video signal is displayed on the full screen.
  • the display (4) 1d the partial image of the rectangular area in the upper right quarter of the image in one screen indicated by the digital video signal is displayed in full screen.
  • an image in one screen indicated by the digital video signal is displayed using four screens of displays (1) 1a, (2) 1b, (3) 1c and (4) 1d. Enlarged display.
  • the signal processing circuits 12 of the displays (1) 1a, (2) 1b, (3) 1c, and (4) 1d are supplied from the input terminal 15 by a predetermined amount (that is, a predetermined time). Alternatively, the digital video signal for the frame) is input and stored in the frame memory (step S1).
  • the signal processing circuit 12 determines whether or not the device itself is set to “primary” (step S2). On the other hand, if the own device is the display (1) 1a, it is determined that the device is set to “primary” (YES in step S2), while the own device is the display (2) 1b, (3) 1c, and (4). In the case of 1d, since it is set to “secondary”, it is determined that it is not set to “primary” (NO in step S2).
  • step S3 the signal processing circuit 12 determines a moving direction and a moving timing of a predetermined screen saver image (step S3).
  • the moving direction and the moving timing can be determined according to a predetermined pattern registered in advance, for example, or can be determined using a function that generates pseudo-random numbers.
  • the signal processing circuit 12 generates a screen saver code based on the movement direction and movement timing determined in step S3 (step S4).
  • the signal processing circuit 12 writes the screen saver code C generated in step S4 into the blanking period portion B in the digital video signal input in step S1 (step S5).
  • the signal processing circuit 12 outputs the digital video signal in which the screen saver code C is written in the blanking period portion B in step S5 from the output terminal 16 as a loop-through signal (step S6).
  • the signal processing circuit 12 is set in its own apparatus based on the moving direction and moving timing of the screen saver image determined by the screen saver code C generated in step S4 (that is, determined in step S3).
  • a screen saver partial image corresponding to the partial area is generated (step S7).
  • the signal processing circuit 12 displays the partial image generated in step S7 on the full screen on the LCD 11 (step S8).
  • step S2 when NO is determined in step S2 (that is, when the device is the display (2) 1b, (3) 1c, or (4) 1d), the signal processing circuit 12 performs the blanking period portion B in the digital video signal. Is read out (step S9).
  • the signal processing circuit 12 outputs the digital video signal input in step S1 from the output terminal 15 as a loop-through signal (step S6).
  • the signal processing circuit 12 uses the screen saver partial image corresponding to the partial area set in the own apparatus based on the moving direction and moving timing of the screen saver image determined by the screen saver code C read out in step S9. Is generated (step S7).
  • the signal processing circuit 12 displays the partial image generated in step S7 on the full screen on the LCD 11 (step S8).
  • the screen saver code C is included in the blanking period portion B2 in the digital video signal output from the display (1) 1a.
  • This screen saver code C is generated based on the operation status (movement direction, movement timing) of the screen saver of the display (1) 1a set as the primary.
  • the display (2) 1b receives the digital video signal output from the display (1) 1a and reads the blanking period portion B2. If the screen saver code C is written, it is read, and the moving direction and moving timing of the screen saver image are determined according to the information, and the screen saver function is executed.
  • the display (2) 1b outputs the digital video signal input from the display (1) 1a as it is. That is, the content of the blanking period part B2 in the input digital video signal and the blanking period part B3 in the output digital video signal are the same.
  • the display (3) 1c and the display (4) 1d operate in the same manner as the display (2) 1b. Therefore, the blanking period B3 in the digital video signal input from the display (2) 1b to the display (3) 1c and the blank in the digital video signal input from the display (3) 1c to the display (4) 1d.
  • the content is the same as that of the ranking period part B4.
  • the display device 1 of the present embodiment when a multi-display system is configured and the screen saver function is used, it is possible to provide a screen saver display with no shift in both the moving direction and the moving timing. Further, by writing a code during the blanking period of the digital video signal, the display timing can be controlled for each frame, for example. Further, it is not necessary to provide a separate control cable. Further, since the screen saver code can be written by the signal processing circuit 12 by software, for example, no dedicated circuit is required.
  • a program for realizing the functions of the signal processing circuit 12 and the CPU 13 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed.
  • the screen saver function may be synchronized among the plurality of display devices 1.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” includes a medium that holds a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • the program may be stored in a predetermined server, and the program may be distributed (downloaded or the like) via a communication line in response to a request from another device.
  • the LCD 11 may be another video display device such as an organic EL display (organic electroluminescence display) or a projector.
  • the transmission of the control signal between the LCD 11 and the signal processing device 12 is not limited to wired communication but may be wireless.
  • ⁇ Appendix 1> A first function unit that inputs a video signal and displays an enlarged partial image in an image based on the video signal in cooperation with another display device;
  • a second functional unit for displaying a predetermined first image while moving the first image;
  • a predetermined code representing the movement status of the first image by the second function unit is written in a blanking period of the video signal,
  • a signal processing circuit for outputting to the other display device;
  • a display device comprising: ⁇ Appendix 2> The display device according to claim 1, wherein the predetermined code is written for each frame of the video signal.
  • ⁇ Appendix 5> A first function for inputting a video signal and cooperating with another display device to enlarge and display a partial image in the image based on the video signal, and a second function for displaying a predetermined first image while moving
  • the display method used When operating both the first function and the second function, a predetermined code representing the movement status of the first image by the second function is written in the blanking period of the video signal, A display method characterized by outputting to a display device.

Abstract

This display device (1) is provided with: a multiscreen display function in which a digital video signal is inputted, and cooperation is performed with another display device to expand and display a partial image in the image on the basis of the digital video signal; and a screen saver function in which a moving prescribed screen saver image is displayed. The display device (1) is further provided with a signal processing circuit (12) which, in cases when both the multiscreen display function and the screen saver function are operated, writes prescribed screen-saver code during the blanking period of the digital video signal, said prescribed screen-saver code expressing the screen-saver-image movement status executed by the screen saver function, and outputs said prescribed screen-saver code to the other display device.

Description

表示装置及び表示方法Display device and display method
　本発明は、マルチディスプレイシステムを構成する際に用いて好適な表示装置及び表示方法に関する。 The present invention relates to a display device and a display method suitable for use in configuring a multi-display system.
　ディスプレイ（表示装置）には、ディスプレイ単体の機能として、スクリーンセーバー機能を備えたものがある。スクリーンセーバー機能とは、ディスプレイ画面の焼付き防止のために、表示された画像を、例えば一定時間おきに左右上下方向に移動させるものである（例えば、特許文献１参照）。 Some displays (display devices) have a screen saver function as a single display function. The screen saver function is to move a displayed image in the horizontal and vertical directions at regular intervals, for example, to prevent burn-in of the display screen (see, for example, Patent Document 1).
　一方、複数のディスプレイを用いて映像表示を行うマルチディスプレイシステムには、１画面の画像を複数のディスプレイを用いて拡大表示できるようにしたものがある。このようなシステムは、例えば各ディスプレイにマルチディスプレイに対応するための機能をもたせることで構成することができる。すなわち、このようなシステムでは、例えば、各ディスプレイに、映像信号に基づく１画面中の１部の領域を全画面で表示できるようにする機能をもたせる。さらに、各ディスプレイで、ディスプレイ毎に表示する領域を選択できるようしておく。さらに、各ディスプレイを近接させて所定の配列で設置するとともに、同一の映像信号を各ディスプレイに入力する。そして、各ディスプレイで、予め設定された各１部の領域を全画面表示することで、複数のディスプレイを用いて１画面の映像を拡大表示することができる。 On the other hand, there is a multi-display system that displays images using a plurality of displays, which can enlarge and display an image of one screen using a plurality of displays. Such a system can be configured, for example, by providing each display with a function for supporting multiple displays. That is, in such a system, for example, each display is provided with a function of displaying a part of the area in one screen based on the video signal on the entire screen. Further, it is possible to select an area to be displayed for each display on each display. Further, the displays are placed close to each other in a predetermined arrangement, and the same video signal is input to each display. Then, by displaying each preset one-part area on the entire screen on each display, it is possible to enlarge and display one screen image using a plurality of displays.
特開２０００－６６６４８号公報JP 2000-66648 A
　しかしながら、上述したスクリーンセーバー機能を備えたディスプレイを複数用いてマルチディスプレイシステムを構成した場合に、スクリーンセーバー機能を動作させると、次のような課題が生じることがある。図６から図８を参照して説明する。図６から図８は、本発明の課題を説明するために本出願人において作成した図面である。図６は、スクリーンセーバー機能の動作を説明するための説明図である。図７は、４台のディスプレイでマルチディスプレイシステムを構成した場合にスクリーンセーバー機能を動作させる例を説明するための説明図である。図８は、４台のディスプレイでマルチディスプレイシステムを構成した場合に、スクリーンセーバー機能を動作させる他の例を説明するための説明図である。 However, when a multi-display system is configured using a plurality of displays having the screen saver function described above, the following problems may occur when the screen saver function is operated. This will be described with reference to FIGS. 6 to 8 are drawings created by the present applicant in order to explain the problems of the present invention. FIG. 6 is an explanatory diagram for explaining the operation of the screen saver function. FIG. 7 is an explanatory diagram for explaining an example of operating the screen saver function when a multi-display system is configured with four displays. FIG. 8 is an explanatory diagram for explaining another example of operating the screen saver function when a multi-display system is configured with four displays.
　また、図６（ｂ）は、図６（ａ）に示したスクリーンセーバー用画像２０を用いてディスプレイ１０でスクリーンセーバー機能を動作させた場合の表示例を示している。スクリーンセーバー用画像２０は、背景画像の中央部に矩形画像を含む画像である。スクリーンセーバー用画像２０は、例えばスクリーンセーバー機能の動作開始直前の表示画像を、その輝度を調節する等してそのまま用いるものとしており、予めスクリーンセーバー機能用に用意した専用の画像とすることができる。このスクリーンセーバー用画像２０を一定時間置きに左右上下方向に移動させた場合、図６（ｂ）に示したようにディスプレイ１０に表示される画像は、画像２１、画像２２、画像２３、画像２４、画像２１、・・・と変化する。なお、各画像２０～２４には一点鎖線で中心線を示している。 FIG. 6B shows a display example when the screen saver function is operated on the display 10 using the screen saver image 20 shown in FIG. The screen saver image 20 is an image including a rectangular image at the center of the background image. As the screen saver image 20, for example, the display image immediately before the start of the operation of the screen saver function is used as it is by adjusting the brightness thereof, and can be a dedicated image prepared for the screen saver function in advance. When the screen saver image 20 is moved in the horizontal and vertical directions at regular intervals, the images displayed on the display 10 as shown in FIG. 6B are the image 21, the image 22, the image 23, the image 24, The image 21 changes as follows. In each of the images 20 to 24, a center line is indicated by a one-dot chain line.
　一方、図７は、図６（ａ）に示したディスプレイ１０を４台使用してマルチディスプレイシステムを構成した場合に、スクリーンセーバー機能を動作させたときの表示画面の変化の一例を示している。図７に示した動作例では、ディスプレイ１０と同一構成の４台のディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄを、左上、左下、右下及び右上に配置している。ディスプレイ１０ａは、図６（ａ）の画像２０中の左上の部分領域２０１の画像を全画面表示する。ディスプレイ１０ｂは、図６（ａ）の画像２０中の左下の部分領域２０２の画像を全画面表示する。ディスプレイ１０ｃは、図６（ａ）の画像２０中の右下の部分領域２０３の画像を全画面表示する。そして、ディスプレイ１０ｄは、図６（ａ）の画像２０中の右上の部分領域２０４の画像を全画面表示する。 On the other hand, FIG. 7 shows an example of a change in the display screen when the screen saver function is operated in the case where the multi-display system is configured by using four displays 10 shown in FIG. In the operation example illustrated in FIG. 7, four displays 10 a, 10 b, 10 c, and 10 d having the same configuration as the display 10 are arranged in the upper left, lower left, lower right, and upper right. The display 10a displays the image of the upper left partial area 201 in the image 20 of FIG. The display 10b displays the image of the lower left partial area 202 in the image 20 of FIG. The display 10c displays the image of the lower right partial area 203 in the image 20 of FIG. Then, the display 10d displays the image of the upper right partial area 204 in the image 20 of FIG.
　図７に示したようにディスプレイ１０ａに表示される画像は、画像３１ａ、画像３２ａ、画像３３ａ、画像３４ａ、画像３１ａ、・・・と変化する。また、ディスプレイ１０ｂに表示される画像は、画像３１ｂ、画像３２ｂ、画像３３ｂ、画像３４ｂ、画像３１ｂ、・・・と変化する。また、ディスプレイ１０ｃに表示される画像は、画像３１ｃ、画像３２ｃ、画像３３ｃ、画像３４ｃ、画像３１ｃ、・・・と変化する。そして、ディスプレイ１０ｄに表示される画像は、画像３１ｄ、画像３２ｄ、画像３３ｄ、画像３４ｄ、画像３１ｄ、・・・と変化する。ここで、画像３１ａ、３１ｂ、３１ｃ及び３１ｄが同時に表示される画像である。画像３２ａ、３２ｂ、３２ｃ及び３２ｄが同時に表示される画像である。画像３３ａ、３３ｂ、３３ｃ及び３３ｄが同時に表示される画像である。そして、画像３４ａ、３４ｂ、３４ｃ及び３４ｄが同時に表示される画像である。 As shown in FIG. 7, the image displayed on the display 10a changes to an image 31a, an image 32a, an image 33a, an image 34a, an image 31a,. Further, the image displayed on the display 10b changes to an image 31b, an image 32b, an image 33b, an image 34b, an image 31b,. Also, the image displayed on the display 10c changes to an image 31c, an image 32c, an image 33c, an image 34c, an image 31c,. Then, the image displayed on the display 10d changes to an image 31d, an image 32d, an image 33d, an image 34d, an image 31d,. Here, the images 31a, 31b, 31c, and 31d are images displayed simultaneously. Images 32a, 32b, 32c, and 32d are images that are displayed simultaneously. Images 33a, 33b, 33c, and 33d are images that are displayed simultaneously. The images 34a, 34b, 34c, and 34d are images that are displayed simultaneously.
　図７に示した動作例では、４台のディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄで拡大表示される画像は、図６（ｂ）に示した画像２１、２２、２３及び２４と相似している。すなわち、４台のディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄで形成される画像が、１枚の画像として正しく表示されている。この場合、各ディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄ間で、画像表示動作の動作タイミングと動作方向とがともに同期している。 In the operation example shown in FIG. 7, the images enlarged and displayed on the four displays 10a, 10b, 10c, and 10d are similar to the images 21, 22, 23, and 24 shown in FIG. That is, the images formed by the four displays 10a, 10b, 10c, and 10d are correctly displayed as one image. In this case, the operation timing and the operation direction of the image display operation are synchronized between the displays 10a, 10b, 10c and 10d.
　他方、図８は、図６（ａ）に示したディスプレイ１０を４台使用してマルチディスプレイシステムを構成した場合に、スクリーンセーバー機能を動作させたときの表示画面の変化の他の例を示している。４台のディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄの構成、配置、表示領域等は、図７に示したものと同一である。ただし、図８に示した動作例では、各ディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄ間で、画像表示動作の動作タイミングと動作方向とが同期していない。そのため、４台のディスプレイ１０ａ、１０ｂ、１０ｃ及び１０ｄで形成される画像は、１枚の画像として正しく表示されていない。 On the other hand, FIG. 8 shows another example of the change in the display screen when the screen saver function is operated when the multi-display system is configured by using the four displays 10 shown in FIG. Yes. The configuration, arrangement, display area and the like of the four displays 10a, 10b, 10c and 10d are the same as those shown in FIG. However, in the operation example shown in FIG. 8, the operation timing and the operation direction of the image display operation are not synchronized between the displays 10a, 10b, 10c, and 10d. Therefore, the images formed by the four displays 10a, 10b, 10c, and 10d are not correctly displayed as one image.
　なお、図８に示した例では、ディスプレイ１０ａに表示される画像は、画像４１ａ、画像４２ａ、画像４３ａ、画像４４ａ、画像４１ａ、・・・と変化する。また、ディスプレイ１０ｂに表示される画像は、画像４１ｂ、画像４２ｂ、画像４３ｂ、画像４４ｂ、画像４１ｂ、・・・と変化する。また、ディスプレイ１０ｃに表示される画像は、画像４１ｃ、画像４２ｃ、画像４３ｃ、画像４４ｃ、画像４１ｃ、・・・と変化する。そして、ディスプレイ１０ｄに表示される画像は、画像４１ｄ、画像４２ｄ、画像４３ｄ、画像４４ｄ、画像４１ｄ、・・・と変化する。ここで、画像４１ａ、４１ｂ、４１ｃ及び４１ｄが同時に表示される画像である。画像４２ａ、４２ｂ、４２ｃ及び４２ｄが同時に表示される画像である。画像４３ａ、４３ｂ、４３ｃ及び４３ｄが同時に表示される画像である。そして、画像４４ａ、４４ｂ、４４ｃ及び４４ｄが同時に表示される画像である。 In the example shown in FIG. 8, the image displayed on the display 10a changes to an image 41a, an image 42a, an image 43a, an image 44a, an image 41a,. Further, the image displayed on the display 10b changes to an image 41b, an image 42b, an image 43b, an image 44b, an image 41b,. Further, the image displayed on the display 10c changes to an image 41c, an image 42c, an image 43c, an image 44c, an image 41c,. The image displayed on the display 10d changes to an image 41d, an image 42d, an image 43d, an image 44d, an image 41d,. Here, the images 41a, 41b, 41c and 41d are images displayed simultaneously. Images 42a, 42b, 42c, and 42d are images that are displayed simultaneously. Images 43a, 43b, 43c, and 43d are images that are displayed simultaneously. The images 44a, 44b, 44c, and 44d are images that are displayed simultaneously.
　図８に示したように、マルチディスプレイシステムでスクリーンセーバー機能を動作させた場合、各ディスプレイで映像移動方向や移動タイミングの同期が取れていないと、各ディスプレイが画像を移動させる方向およびタイミングが一致しなくなる。すなわち、マルチディスプレイシステムでスクリーンセーバー機能を使用した場合には、スクリーンセーバー用の表示画像の移動方向や移動タイミングにずれが生じてしまうことがあるという課題がある。この場合、全体で見たときに、統一感のない表示となってしまい、商品性を著しく損なっている。 As shown in FIG. 8, when the screen saver function is operated in a multi-display system, the direction and timing of moving images on each display coincide with each other unless the video movement direction and movement timing are synchronized on each display. Disappear. That is, when the screen saver function is used in the multi-display system, there is a problem that a shift may occur in the moving direction and the moving timing of the screen saver display image. In this case, when it sees as a whole, it becomes a display without a sense of unity, and the merchantability is remarkably impaired.
　また、各ディスプレイ間の同期を取るために、ＲＳ－２３２Ｃ（Ｒｅｃｏｍｍｅｎｄｅｄ　Ｓｔａｎｄａｒｄ　２３２　ｖｅｒｓｉｏｎ　Ｃ）やＬＡＮ（Ｌｏｃａｌ　Ａｒｅａ　Ｎｅｔｗｏｒｋ）等の通信を使用する方法も考えられる。しかし、そのような方法では、機器間の通信に時間がかかり、その遅延時間のため、各ディスプレイを一体化して動作させることは困難である。 Also, in order to synchronize each display, a method using communication such as RS-232C (Recommended Standard 232 version C) or LAN (Local Area Network) is also conceivable. However, in such a method, it takes time for communication between devices, and due to the delay time, it is difficult to operate each display in an integrated manner.
　本発明は、上記の事情を考慮してなされたものであり、上記の課題を解決することができる表示装置及び表示方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device and a display method that can solve the above-described problems.
　上記課題を解決するため、本発明の表示装置は、映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能部と、所定の第１画像を移動させながら表示する第２機能部と、前記第１機能部と前記第２機能部との両方を動作させる場合に、前記第２機能部による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力する信号処理回路と、を備えることを特徴する。 In order to solve the above-described problems, a display device according to the present invention includes a first function unit that inputs a video signal and displays a partial image in the image based on the video signal in an enlarged manner in cooperation with another display device; When moving both the second functional unit that displays the first image while moving the first functional unit and the first functional unit and the second functional unit, the movement status of the first image by the second functional unit is determined. And a signal processing circuit that writes a predetermined code to be displayed in the blanking period of the video signal and outputs the code to the other display device.
　また、本発明の表示方法は、映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能と、所定の第１画像を移動させながら表示する第２機能とを用いた表示方法であって、前記第１機能と前記第２機能との両方を動作させる場合に、前記第２機能による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力することを特徴する。 The display method of the present invention also includes a first function for inputting a video signal and enlarging and displaying a partial image in the image based on the video signal in cooperation with another display device, and moving a predetermined first image. A display method using the second function for displaying the image, and when both the first function and the second function are operated, a predetermined state representing a movement state of the first image by the second function Is written in the blanking period of the video signal and is output to the other display device.
　本発明によれば、第２機能（例えばスクリーンセーバー機能）による第１画像（例えばスクリーンセーバー用画像）の移動状況を表す所定のコードを、映像信号のブランキング期間に書き込んで他の表示装置に出力する。したがって、他の表示装置は、所定のコードを読み出すことで、容易に、所定のコードを書き込んだ表示装置における第１画像の移動状況に同期させて、第１画像を表示することができる。よって、複数の表示装置を用いて拡大画像を表示する場合であっても、複数の表示装置間で、第１画像の移動方向や移動タイミングにずれが生じないようにすることができる。 According to the present invention, the predetermined code indicating the movement status of the first image (for example, screen saver image) by the second function (for example, screen saver function) is written in the blanking period of the video signal and output to another display device. . Therefore, the other display device can easily display the first image in synchronization with the movement state of the first image in the display device in which the predetermined code is written by reading the predetermined code. Therefore, even when a magnified image is displayed using a plurality of display devices, it is possible to prevent a shift in the movement direction and movement timing of the first image between the plurality of display devices.
本発明による表示装置の一実施形態の構成例を示したブロック図である。It is the block diagram which showed the example of a structure of one Embodiment of the display apparatus by this invention. 図１の表示装置１に入力されるデジタル映像信号のデータフォーマットの一例を示した図である。It is the figure which showed an example of the data format of the digital video signal input into the display apparatus 1 of FIG. 図１の表示装置１に入力されるデジタル映像信号のデータフォーマットの他の例を示した図である。It is the figure which showed the other example of the data format of the digital video signal input into the display apparatus 1 of FIG. 図１の表示装置１の動作例を示したフローチャートである。3 is a flowchart illustrating an operation example of the display device 1 of FIG. 1. 図１の表示装置１を複数用いて構成したマルチディスプレイシステムの一例を説明するための図である。It is a figure for demonstrating an example of the multi-display system comprised using multiple display apparatuses 1 of FIG. スクリーンセーバー機能の動作例を示した図である。It is the figure which showed the operation example of the screen saver function. マルチディスプレイシステムにおけるスクリーンセーバー機能の動作例を示した図である。It is the figure which showed the operation example of the screen saver function in a multi-display system. マルチディスプレイシステムにおけるスクリーンセーバー機能の他の動作例を示した図である。It is the figure which showed the other operation example of the screen saver function in a multi-display system.
　以下、図面を参照して本発明の一実施形態について説明する。図１に示したディスプレイ１は、ＬＣＤ（Ｌｉｑｕｉｄ　Ｃｒｙｓｔａｌ　Ｄｉｓｐｌａｙ；液晶ディスプレイ）１１、信号処理回路１２、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）１３、操作部１４、入力端子１５及び出力端子１６を備えている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The display 1 shown in FIG. 1 includes an LCD (Liquid Crystal Display) 11, a signal processing circuit 12, a CPU (Central Processing Unit) 13, an operation unit 14, an input terminal 15, and an output terminal 16.
　ＬＣＤ１１は、液晶パネルと、その駆動回路等を有して構成されている。ＬＣＤ１１は、信号処理回路１２から供給される制御信号に基づいて画像を表示する。 The LCD 11 has a liquid crystal panel and a drive circuit thereof. The LCD 11 displays an image based on the control signal supplied from the signal processing circuit 12.
　信号処理回路１２は、ＣＰＵ１３と所定の制御信号を送受信しながら、入力端子１５から入力されたデジタル映像信号からの信号検出、同デジタル映像信号のデコード、同デジタル映像信号が示す画像に対する画質調整、スケーリング処理等を行い、所定の制御信号を生成してＬＣＤ１１に供給する。信号処理回路１２は、内部に演算装置のほか、揮発及び不揮発のメモリやデジタル映像信号の入出力用回路や汎用入出力回路等の周辺装置を備えるデジタル信号処理装置である。信号処理装置１２は、内部の不揮発メモリに記憶されているプログラムを実行することで内部のハードウェアを用いて所定の処理を行う。 The signal processing circuit 12 transmits and receives a predetermined control signal to and from the CPU 13, detects a signal from the digital video signal input from the input terminal 15, decodes the digital video signal, adjusts the image quality of the image indicated by the digital video signal, A scaling process or the like is performed to generate a predetermined control signal and supply it to the LCD 11. The signal processing circuit 12 is a digital signal processing device that includes peripheral devices such as a volatile and nonvolatile memory, a digital video signal input / output circuit, and a general-purpose input / output circuit in addition to an arithmetic device. The signal processing device 12 performs a predetermined process using internal hardware by executing a program stored in an internal nonvolatile memory.
　信号処理回路１２は、さらに、スクリーンセーバー用のコードをデジタル映像信号のブランキング期間に書込み、出力端子１６から出力する機能を備えている。信号処理回路１２は、また、複数フレーム分の揮発性のフレームメモリや、所定の画像を格納する不揮発性のフレームメモリを有し、これらのメモリに記憶されている画像情報に基づいてスクリーンセーバー用画像を表示する機能（以下、スクリーンセーバー機能と呼ぶ）を備えている。スクリーンセーバー機能は、所定のスクリーンセーバー用画像を移動させながらＬＣＤ１１の画面上に表示する機能である。スクリーンセーバー機能は、例えば、ユーザが操作部１５に所定の操作を行うことで動作を開始したり、信号処理回路１２に入力されたデジタル映像信号中の映像信号に一定時間所定の変化が起こらなかった場合に動作を開始したりする。 The signal processing circuit 12 further has a function of writing a screen saver code in the blanking period of the digital video signal and outputting it from the output terminal 16. The signal processing circuit 12 also has a volatile frame memory for a plurality of frames and a non-volatile frame memory for storing a predetermined image. Based on the image information stored in these memories, the screen saver image Is provided (hereinafter referred to as a screen saver function). The screen saver function is a function for displaying a predetermined screen saver image on the screen of the LCD 11 while moving it. For example, the screen saver function does not start when the user performs a predetermined operation on the operation unit 15, or a predetermined change does not occur in the video signal in the digital video signal input to the signal processing circuit 12. Or start the operation.
　さらに、信号処理回路１２は、ＣＰＵ１３と所定の制御信号を送受信しながら、同一構成の他の複数の表示装置１とともにマルチディスプレイシステムを構成して、映像を拡大して表示するための機能（以下、マルチスクリーン表示機能と呼ぶ）を備えている。なお、マルチスクリーン表示機能は、タイルマトリクス機能等とも呼ばれる。
　つまり、信号処理回路１２は、上記各機能を実現する機能部である。 Furthermore, the signal processing circuit 12 constitutes a multi-display system together with a plurality of other display devices 1 having the same configuration while transmitting / receiving a predetermined control signal to / from the CPU 13 and enlarges and displays a video (hereinafter referred to as a function) Called a multi-screen display function). Note that the multi-screen display function is also called a tile matrix function or the like.
That is, the signal processing circuit 12 is a functional unit that implements the above functions.
　スクリーンセーバー用コードとは、表示装置１でスクリーンセーバー機能を動作させた場合に、スクリーンセーバー用の表示画像の移動方向、移動量や移動タイミング等をフレーム単位（あるいは所定の複数フレーム単位）で符号化して表したデータである。ここで、スクリーンセーバー用の表示画像は、所定のスクリーンセーバー用初期画像を時間経過にともなって移動させた画像である。そして、スクリーンセーバー用初期画像は、表示装置１（すなわち信号処理回路１２等）内の所定の記憶装置に予め格納しておいた画像としたり、スクリーンセーバー機能が動作する直前の画像の輝度等を調節した画像としたりすることができる。また、スクリーンセーバー用の表示画像の移動方向や移動量は、１フレーム前（あるいは所定の複数フレーム前）を基準として、例えば、上、右上、右、右下、下、左下、左、左上等の所定の方向を表す情報と、その方向の移動量を表す情報とを、符号化したデータを用いて表される。ただし、移動量は、例えば常に一定の値にすることとしておけば、省略することができる。符号化したデータとは、例えば上、右上、右等の移動方向を、１、２、３等の数値情報に変換したものである。移動タイミングは、例えば、当該フレームにおいて、１フレーム前（あるいは所定の複数フレーム前）を基準として、画像を移動させる又は移動させないということを表す情報を、符号化したデータ（例えば「１」や「０」）を用いて表される。すなわち、スクリーンセーバー用コードは、移動前の画像を基準として（あるいは移動後の画像と移動前の画像との差分を用いて）、スクリーンセーバー用表示画像の移動状況を表すための情報である。スクリーンセーバー用の表示画像とスクリーンセーバー用コードとが分かれば、各フレームで表示すべきスクリーンセーバー用の表示画像を求めることができる。 The screen saver code is expressed by encoding the moving direction, moving amount, moving timing, etc. of the display image for the screen saver in units of frames (or in units of predetermined plural frames) when the screen saver function is operated on the display device 1. Data. Here, the display image for the screen saver is an image obtained by moving a predetermined initial image for the screen saver over time. The initial screen saver image is an image stored in advance in a predetermined storage device in the display device 1 (that is, the signal processing circuit 12 or the like), or the brightness or the like of the image immediately before the screen saver function is operated is adjusted. Or an image. Further, the moving direction and the moving amount of the display image for the screen saver are, for example, upper, upper right, right, lower right, lower, lower left, left, upper left, etc. on the basis of one frame before (or a plurality of predetermined frames before). Information representing a predetermined direction and information representing the amount of movement in that direction are represented using encoded data. However, if the movement amount is always set to a constant value, it can be omitted. The encoded data is obtained by converting the movement direction such as upper, upper right, and right into numerical information such as 1, 2, 3, and the like. The movement timing is, for example, information indicating that an image is moved or not moved with reference to one frame before (or a plurality of predetermined frames before) in the frame, encoded data (for example, “1” or “ 0 "). That is, the screen saver code is information for indicating the movement state of the screen saver display image with reference to the image before movement (or using the difference between the image after movement and the image before movement). If the display image for the screen saver and the screen saver code are known, the display image for the screen saver to be displayed in each frame can be obtained.
　ＣＰＵ１３は、マイクロコントローラ等とも呼ばれる半導体情報処理装置であり、内部に演算装置のほか、揮発及び不揮発のメモリ、汎用入出力回路、シリアル信号の入出力回路等の周辺装置を備えている。ＣＰＵ１３は、内部の不揮発メモリに記憶されているプログラムを実行することで内部のハードウェアを用いて所定の処理を行う。ＣＰＵ１３は、例えば、信号処理回路１２と所定の制御信号を送受信することで、ＬＣＤ１１に所定の設定画面を表示させながら、操作部１４の操作に応じて所定のパラメータを設定する。例えば、ＣＰＵ１３は、操作部１４の操作に応じて、スクリーンセーバー機能やマルチスクリーン表示機能で用いる複数のパラメータを設定する。 The CPU 13 is a semiconductor information processing device also called a microcontroller or the like, and includes peripheral devices such as a volatile and nonvolatile memory, a general-purpose input / output circuit, and a serial signal input / output circuit in addition to an arithmetic device. The CPU 13 performs a predetermined process using internal hardware by executing a program stored in the internal nonvolatile memory. For example, the CPU 13 transmits and receives a predetermined control signal to and from the signal processing circuit 12 to set a predetermined parameter according to the operation of the operation unit 14 while displaying a predetermined setting screen on the LCD 11. For example, the CPU 13 sets a plurality of parameters used in the screen saver function and the multi-screen display function in accordance with the operation of the operation unit 14.
　操作部１４は、ユーザからの指示を入力するための入力装置であり、押しボタンやカーソルキー等とそれらための検知回路とを含んで構成されている。ユーザは、操作部１４に対して所定の操作を行うことで、各種設定を行う。操作部１４が検知した操作内容を表す情報は、ＣＰＵ１３へ出力される。なお、操作部１４は、さらにリモートコントロール装置用の受信装置を含むようにして、無線信号を用いて各種入力操作を行うようにしてもよい。 The operation unit 14 is an input device for inputting an instruction from the user, and includes a push button, a cursor key, and a detection circuit for them. The user performs various settings by performing a predetermined operation on the operation unit 14. Information representing the operation content detected by the operation unit 14 is output to the CPU 13. Note that the operation unit 14 may further include a receiving device for a remote control device, and may perform various input operations using wireless signals.
　入力端子１５は、所定形式のデジタル映像信号用ケーブルが接続される端子である。入力端子１５は、接続されたデジタル映像信号用ケーブルを介して入力されたデジタル映像信号を、信号処理回路１２へ入力する。 The input terminal 15 is a terminal to which a predetermined format digital video signal cable is connected. The input terminal 15 inputs a digital video signal input via the connected digital video signal cable to the signal processing circuit 12.
　出力端子１６は、所定形式のデジタル映像信号用ケーブルが接続される端子である。出力端子１６は、接続されたデジタル映像信号用ケーブルを介して信号処理回路１２から出力されたデジタル映像信号を出力する。 The output terminal 16 is a terminal to which a predetermined format digital video signal cable is connected. The output terminal 16 outputs the digital video signal output from the signal processing circuit 12 via the connected digital video signal cable.
　ここで、図２及び図３を参照して入力端子１５及び出力端子１６で入出力されるデジタル映像信号の形式について説明する。図２は、例えば外部の信号源から入力されるデジタル映像信号のデータフォーマットの一例を示す図である。図３は、図２に示したデジタル映像信号に対して、本実施形態の表示装置１でスクリーンセーバー用コードＣを書き込んだデジタル映像信号のデータフォーマットの一例を示す図である。 Here, the format of the digital video signal input / output at the input terminal 15 and the output terminal 16 will be described with reference to FIGS. FIG. 2 is a diagram illustrating an example of a data format of a digital video signal input from, for example, an external signal source. FIG. 3 is a diagram showing an example of the data format of the digital video signal in which the screen saver code C is written in the display device 1 of the present embodiment with respect to the digital video signal shown in FIG.
　図２に示したデジタル映像信号は、１フレーム分（すなわち１画面分）の映像信号の格納領域である映像信号部Ｍと、フレーム毎のブランキング期間（すなわち水平ブランキング期間）に対応する領域であるブランキング期間部Ｂとを１組にして、これらを繰り返し含むことで構成されている。ブランキング期間部Ｂには、フレーム単位で映像表示を同期させるための映像同期信号Ｓを含んでいる。 The digital video signal shown in FIG. 2 is an area corresponding to a video signal portion M that is an area for storing a video signal for one frame (that is, one screen) and a blanking period for each frame (that is, a horizontal blanking period) The blanking period portion B is a set, and these are repeatedly included. The blanking period portion B includes a video synchronization signal S for synchronizing video display in units of frames.
　また、図３に示したデジタル映像信号も、図２と同様に、映像信号部Ｍとブランキング期間部Ｂとを１組として、これらを繰り返し含むことで構成されている。ただし、図３に示したデジタル映像信号は、図２と異なり、ブランキング期間部Ｂに、スクリーンセーバー用コードＣを含んでいる。スクリーンセーバー用コードＣは、信号処理回路１２によって書き込まれる。その際、映像信号部Ｍと、映像同期信号Ｓとは、スクリーンセーバー用コードＣを書き込む前後で特に変更されない。 Also, the digital video signal shown in FIG. 3 is configured by repeatedly including a video signal part M and a blanking period part B as a set, similarly to FIG. However, the digital video signal shown in FIG. 3 includes a screen saver code C in the blanking period portion B, unlike FIG. The screen saver code C is written by the signal processing circuit 12. At that time, the video signal portion M and the video synchronization signal S are not particularly changed before and after the screen saver code C is written.
　次に、図４及び図５を参照して、図１に示した表示装置１の動作例について説明する。図４は、図１に示した表示装置１の動作例を説明するためのフローチャートである。図４に示した処理は、スクリーンセーバー機能の動作中に、信号処理回路１２によって（あるいは信号処理回路１２及びＣＰＵ１３によって）実行される。ただし、以下では、信号処理回路１２が実行することとして説明を行う。 Next, an example of the operation of the display device 1 shown in FIG. 1 will be described with reference to FIGS. FIG. 4 is a flowchart for explaining an operation example of the display device 1 shown in FIG. The processing shown in FIG. 4 is executed by the signal processing circuit 12 (or by the signal processing circuit 12 and the CPU 13) during the operation of the screen saver function. However, the following description will be made assuming that the signal processing circuit 12 executes.
　なお、この動作例は、図５（ａ）に示したマルチディスプレイシステム１００における動作例である。図５（ａ）に示したマルチディスプレイシステム１００は、図１に示した表示装置１と同一構成である４台のディスプレイ（１）１ａ、ディスプレイ（２）１ｂ、ディスプレイ（３）１ｃ及びディスプレイ（４）１ｄを用いて構成されている。 Note that this operation example is an operation example in the multi-display system 100 shown in FIG. The multi-display system 100 shown in FIG. 5A includes four displays (1) 1a, a display (2) 1b, a display (3) 1c, and a display (shown in the same configuration as the display device 1 shown in FIG. 4) It is configured using 1d.
　図５（ａ）に示したように、ディスプレイ（１）１ａ、ディスプレイ（２）１ｂ、ディスプレイ（３）１ｃ及びディスプレイ（４）１ｄは、表示画面に向かって左上、左下、右下及び右上にそれぞれ配置される位置関係を有して設置されている。また、ディスプレイ（１）１ａ、ディスプレイ（２）１ｂ、ディスプレイ（３）１ｃ及びディスプレイ（４）１ｄでは、括弧で囲って示した番号順にデジタル映像信号が伝送される。 As shown in FIG. 5A, the display (1) 1a, the display (2) 1b, the display (3) 1c, and the display (4) 1d are located on the upper left, lower left, lower right, and upper right toward the display screen. They are installed in a positional relationship. Further, in the display (1) 1a, the display (2) 1b, the display (3) 1c, and the display (4) 1d, digital video signals are transmitted in the order indicated by numbers in parentheses.
　また、図５（ｂ）に示したように、デジタル映像信号を発生する信号源２とディスプレイ（１）１ａとがケーブル３ａを介して接続されている。この場合、信号源２に接続されているケーブル３ａは、ディスプレイ（１）１ａの入力端子（図１の入力端子１５に対応する。以下、同様。）に接続されている。また、ディスプレイ（１）１ａの出力端子（図１の出力端子１６に対応する。以下、同様。）と、ディスプレイ（２）１ｂの入力端子とが、ケーブル３ｂで接続されている。また、ディスプレイ（２）１ｂの出力端子と、ディスプレイ（３）１ｃの入力端子とが、ケーブル３ｃで接続されている。さらに、ディスプレイ（３）１ｃの出力端子と、ディスプレイ（４）１ｄの入力端子とが、ケーブル３ｄで接続されている。 Further, as shown in FIG. 5B, a signal source 2 for generating a digital video signal and a display (1) 1a are connected via a cable 3a. In this case, the cable 3a connected to the signal source 2 is connected to the input terminal of the display (1) 1a (corresponding to the input terminal 15 in FIG. 1, the same applies hereinafter). Further, the output terminal of the display (1) 1a (corresponding to the output terminal 16 of FIG. 1; the same applies hereinafter) and the input terminal of the display (2) 1b are connected by a cable 3b. The output terminal of the display (2) 1b and the input terminal of the display (3) 1c are connected by a cable 3c. Furthermore, the output terminal of the display (3) 1c and the input terminal of the display (4) 1d are connected by a cable 3d.
　なお、図４に示した動作例は、各ディスプレイ（１）１ａ、（２）１ｂ、（３）１ｃ及び（４）１ｄで、スクリーンセーバー機能と、マルチスクリーン表示機能とを同時に動作させる場合の動作の一例である。ただし、これらのスクリーンセーバー機能とマルチスクリーン表示機能とは、次のような複数のパラメータを予め設定した上で実行される。 The operation example shown in FIG. 4 is an operation in the case where the screen saver function and the multi-screen display function are simultaneously operated on each display (1) 1a, (2) 1b, (3) 1c, and (4) 1d. It is an example. However, the screen saver function and the multi-screen display function are executed after presetting a plurality of parameters as follows.
　すなわち、スクリーンセーバー機能では、外部の信号源２から直接（あるいは最初に）デジタル映像信号が入力される表示装置１に対して、その旨を示すパラメータを設定しておく。例えば、外部の信号源２から直接、デジタル映像信号が入力される表示装置１を「プライマリ」として設定する。そして、それ以外の表示装置１（すなわち他の表示装置１からデジタル映像信号が入力される表示装置１）を、すべて「セカンダリ」として設定する。図５（ｂ）に示した構成例では、ディスプレイ（１）１ａが「プライマリ」であり、他のディスプレイ（２）１ｂ、（３）１ｃ及び（４）１ｄが「セカンダリ」である。ユーザは、スクリーンセーバー機能を動作させる前に操作部１４に所定の操作を行って、各表示装置１に「プライマリ」又は「セカンダリ」のパラメータを設定しておく。 That is, in the screen saver function, a parameter indicating the fact is set for the display device 1 to which a digital video signal is input directly (or first) from the external signal source 2. For example, the display device 1 to which a digital video signal is directly input from the external signal source 2 is set as “primary”. All other display devices 1 (that is, the display device 1 to which the digital video signal is input from the other display device 1) are set as “secondary”. In the configuration example shown in FIG. 5B, the display (1) 1a is “primary”, and the other displays (2) 1b, (3) 1c, and (4) 1d are “secondary”. The user performs a predetermined operation on the operation unit 14 before operating the screen saver function, and sets a parameter of “primary” or “secondary” in each display device 1.
　他方、マルチスクリーン表示機能では、マルチディスプレイシステムを構成する複数の表示装置１に対して、マルチスクリーン表示機能を動作させることを示すパラメータと、表示装置１の台数を表すパラメータと、自装置が配置されている位置を表すパラメータとを設定しておく。図５（ａ）に示した配置では、ディスプレイ（１）１ａ、（２）１ｂ、（３）１ｃ及び（４）１ｄのすべてに、「マルチスクリーン表示機能を動作させること」及び台数が「４台」であること示すパラメータを設定する。そして、ディスプレイ（１）１ａには配置が「左上」であること、ディスプレイ（２）１ｂには「左下」であること、ディスプレイ（３）１ｃには「右下」であること、そして、ディスプレイ（４）１ｄには「左上」であることを設定しておく。このように設定することで、ディスプレイ（１）１ａでは、デジタル映像信号が示す１画面中の画像の左上４分の１の矩形領域の部分画像が、全画面表示される。ディスプレイ（２）１ｂでは、デジタル映像信号が示す１画面中の画像の左下４分の１の矩形領域の部分画像が、全画面表示される。ディスプレイ（３）１ｃでは、デジタル映像信号が示す１画面中の画像の右下４分の１の矩形領域の部分画像が、全画面表示される。そして、ディスプレイ（４）１ｄでは、デジタル映像信号が示す１画面中の画像の右上４分の１の矩形領域の部分画像が、全画面表示される。マルチスクリーン表示機能では、この設定に従って、デジタル映像信号が示す１画面中の画像が、ディスプレイ（１）１ａ、（２）１ｂ、（３）１ｃ及び（４）１ｄの４枚の画面を用いて拡大表示される。 On the other hand, in the multi-screen display function, a parameter indicating that the multi-screen display function is operated for a plurality of display devices 1 constituting the multi-display system, a parameter indicating the number of display devices 1, and the own device are arranged. A parameter that represents the position being set is set in advance. In the arrangement shown in FIG. 5A, all of the displays (1) 1a, (2) 1b, (3) 1c and (4) 1d are “operating the multi-screen display function” and the number is “4”. Set the parameter to indicate that it is a “stand”. The display (1) 1a is “upper left”, the display (2) 1b is “lower left”, the display (3) 1c is “lower right”, and the display (4) Set 1d to be “upper left”. By setting in this way, on the display (1) 1a, the partial image of the rectangular area in the upper left quarter of the image in one screen indicated by the digital video signal is displayed on the full screen. On the display (2) 1b, the partial image of the rectangular area in the lower left quarter of the image in one screen indicated by the digital video signal is displayed on the full screen. On the display (3) 1c, the partial image of the rectangular region in the lower right quarter of the image in one screen indicated by the digital video signal is displayed on the full screen. On the display (4) 1d, the partial image of the rectangular area in the upper right quarter of the image in one screen indicated by the digital video signal is displayed in full screen. In the multi-screen display function, according to this setting, an image in one screen indicated by the digital video signal is displayed using four screens of displays (1) 1a, (2) 1b, (3) 1c and (4) 1d. Enlarged display.
　いま、スクリーンセーバー機能が動作を開始したとすると、各ディスプレイ（１）１ａ、（２）１ｂ、（３）１ｃ及び（４）１ｄの信号処理回路１２は、入力端子１５から所定量（すなわち所定時間あるいはフレーム分）のデジタル映像信号を入力して、フレームメモリに記憶する（ステップＳ１）。次に、信号処理回路１２は、自装置が「プライマリ」に設定されている否かを判定する（ステップＳ２）。一方、自装置がディスプレイ（１）１ａの場合は「プライマリ」に設定されていると判定され（ステップＳ２でＹＥＳ）、他方、自装置がディスプレイ（２）１ｂ、（３）１ｃ及び（４）１ｄの場合は「セカンダリ」に設定されているので、「プライマリ」に設定されていないと判定される（ステップＳ２でＮＯ）。 Assuming that the screen saver function starts to operate, the signal processing circuits 12 of the displays (1) 1a, (2) 1b, (3) 1c, and (4) 1d are supplied from the input terminal 15 by a predetermined amount (that is, a predetermined time). Alternatively, the digital video signal for the frame) is input and stored in the frame memory (step S1). Next, the signal processing circuit 12 determines whether or not the device itself is set to “primary” (step S2). On the other hand, if the own device is the display (1) 1a, it is determined that the device is set to “primary” (YES in step S2), while the own device is the display (2) 1b, (3) 1c, and (4). In the case of 1d, since it is set to “secondary”, it is determined that it is not set to “primary” (NO in step S2).
　ステップＳ２でＹＥＳとなった場合（すなわちディスプレイ（１）１ａの場合）、信号処理回路１２は、所定のスクリーンセーバー用画像の移動方向と移動タイミングを決定する（ステップＳ３）。移動方向と移動タイミングは、例えば予め登録されている所定のパターンに従って決定したり、疑似乱数を発生する関数等を用いて決定したりすることができる。 When YES is determined in step S2 (that is, in the case of the display (1) 1a), the signal processing circuit 12 determines a moving direction and a moving timing of a predetermined screen saver image (step S3). The moving direction and the moving timing can be determined according to a predetermined pattern registered in advance, for example, or can be determined using a function that generates pseudo-random numbers.
　次に、信号処理回路１２は、ステップＳ３で決定した移動方向と移動タイミングに基づいて、スクリーンセーバー用コードを生成する（ステップＳ４）。次に、信号処理回路１２は、図３に示したように、ステップＳ１で入力したデジタル映像信号中のブランキング期間部Ｂに、ステップＳ４で生成したスクリーンセーバー用コードＣを書き込む（ステップＳ５）。 Next, the signal processing circuit 12 generates a screen saver code based on the movement direction and movement timing determined in step S3 (step S4). Next, as shown in FIG. 3, the signal processing circuit 12 writes the screen saver code C generated in step S4 into the blanking period portion B in the digital video signal input in step S1 (step S5).
　次に、信号処理回路１２は、ステップＳ５でブランキング期間部Ｂにスクリーンセーバー用コードＣを書き込んだデジタル映像信号を、ループスルー信号として出力端子１６から出力する（ステップＳ６）。 Next, the signal processing circuit 12 outputs the digital video signal in which the screen saver code C is written in the blanking period portion B in step S5 from the output terminal 16 as a loop-through signal (step S6).
　次に、信号処理回路１２は、ステップＳ４で生成したスクリーンセーバー用コードＣによって決定される（すなわちステップＳ３で決定された）スクリーンセーバー用画像の移動方向と移動タイミングに基づいて自装置に設定されている部分領域に対応したスクリーンセーバー用部分画像を生成する（ステップＳ７）。 Next, the signal processing circuit 12 is set in its own apparatus based on the moving direction and moving timing of the screen saver image determined by the screen saver code C generated in step S4 (that is, determined in step S3). A screen saver partial image corresponding to the partial area is generated (step S7).
　次に、信号処理回路１２は、ステップＳ７で生成した部分画像を、ＬＣＤ１１で全画面表示する（ステップＳ８）。 Next, the signal processing circuit 12 displays the partial image generated in step S7 on the full screen on the LCD 11 (step S8).
　一方、ステップＳ２でＮＯとなった場合（すなわち自装置がディスプレイ（２）１ｂ、（３）１ｃ又は（４）１ｄの場合）、信号処理回路１２は、デジタル映像信号中のブランキング期間部Ｂに書き込まれているスクリーンセーバー用コードＣを読み出す（ステップＳ９）。 On the other hand, when NO is determined in step S2 (that is, when the device is the display (2) 1b, (3) 1c, or (4) 1d), the signal processing circuit 12 performs the blanking period portion B in the digital video signal. Is read out (step S9).
　次に、信号処理回路１２は、ステップＳ１で入力したデジタル映像信号を、ループスルー信号として出力端子１５から出力する（ステップＳ６）。 Next, the signal processing circuit 12 outputs the digital video signal input in step S1 from the output terminal 15 as a loop-through signal (step S6).
　次に、信号処理回路１２は、ステップＳ９で読み出したスクリーンセーバー用コードＣによって決定されるスクリーンセーバー用画像の移動方向と移動タイミングに基づいて自装置に設定されている部分領域に対応したスクリーンセーバー用部分画像を生成する（ステップＳ７）。 Next, the signal processing circuit 12 uses the screen saver partial image corresponding to the partial area set in the own apparatus based on the moving direction and moving timing of the screen saver image determined by the screen saver code C read out in step S9. Is generated (step S7).
　次に、信号処理回路１２は、ステップＳ７で生成した部分画像を、ＬＣＤ１１で全画面表示する（ステップＳ８）。 Next, the signal processing circuit 12 displays the partial image generated in step S7 on the full screen on the LCD 11 (step S8).
　図４に示した処理を、図５に示したマルチディスプレイシステム１００を構成する各ディスプレイ（１）１ａ、（２）１ｂ、（３）１ｃ及び（４）１ｄの信号処理回路１２で行うと、図５（ｂ）に示したようにデジタル映像信号中のブランキング期間部Ｂの内容が変化する。すなわち、信号源２から出力されたデジタル映像信号中のブランキング期間部Ｂ１にはスクリーンセーバー用コードＣは含まれていない。 When the processing shown in FIG. 4 is performed by the signal processing circuit 12 of each display (1) 1a, (2) 1b, (3) 1c and (4) 1d constituting the multi-display system 100 shown in FIG. As shown in FIG. 5B, the content of the blanking period portion B in the digital video signal changes. That is, the screen saver code C is not included in the blanking period B1 in the digital video signal output from the signal source 2.
　次に、ディスプレイ（１）１ａから出力されたデジタル映像信号中のブランキング期間部Ｂ２にはスクリーンセーバー用コードＣが含まれている。このスクリーンセーバー用コードＣは、プライマリに設定されているディスプレイ（１）１ａのスクリーンセーバーの動作状況（移動方向、移動タイミング）を元に生成されたものである。 Next, the screen saver code C is included in the blanking period portion B2 in the digital video signal output from the display (1) 1a. This screen saver code C is generated based on the operation status (movement direction, movement timing) of the screen saver of the display (1) 1a set as the primary.
　次に、ディスプレイ（２）１ｂは、ディスプレイ（１）１ａから出力されたデジタル映像信号を入力し、ブランキング期間部Ｂ２を読み取る。そして、スクリーンセーバー用コードＣが書かれていれば、それを読込み、その情報に従い、スクリーンセーバー用画像の移動方向および移動タイミングを決定し、スクリーンセーバー機能を実行する。また、ディスプレイ（２）１ｂは、ディスプレイ（１）１ａから入力したデジタル映像信号をそのまま出力する。すなわち、入力したデジタル映像信号中のブランキング期間部Ｂ２と、出力したデジタル映像信号中のブランキング期間部Ｂ３とは内容が同一である。 Next, the display (2) 1b receives the digital video signal output from the display (1) 1a and reads the blanking period portion B2. If the screen saver code C is written, it is read, and the moving direction and moving timing of the screen saver image are determined according to the information, and the screen saver function is executed. The display (2) 1b outputs the digital video signal input from the display (1) 1a as it is. That is, the content of the blanking period part B2 in the input digital video signal and the blanking period part B3 in the output digital video signal are the same.
　ディスプレイ（３）１ｃ及びディスプレイ（４）１ｄも、ディスプレイ（２）１ｂと同様の動作をする。したがって、ディスプレイ（２）１ｂからディスプレイ（３）１ｃに入力されたデジタル映像信号中のブランキング期間部Ｂ３と、ディスプレイ（３）１ｃからディスプレイ（４）１ｄに入力されたデジタル映像信号中のブランキング期間部Ｂ４とは内容が同一である。 The display (3) 1c and the display (4) 1d operate in the same manner as the display (2) 1b. Therefore, the blanking period B3 in the digital video signal input from the display (2) 1b to the display (3) 1c and the blank in the digital video signal input from the display (3) 1c to the display (4) 1d. The content is the same as that of the ranking period part B4.
　以上のように、本実施形態の表示装置１によれば、マルチディスプレイシステムを構成してスクリーンセーバー機能を使用した場合に、移動方向および移動タイミング共に、ずれのないスクリーンセーバー表示を提供できる。また、デジタル映像信号のブランキング期間にコードを書込むことにより、表示タイミングを例えば１フレーム毎に制御することが可能である。また、制御用のケーブルを別に設ける必要がない。さらに、スクリーンセーバー用コードの書込みは信号処理回路１２により、例えばソフトウェア的に行えるため、専用の回路を必要としない。 As described above, according to the display device 1 of the present embodiment, when a multi-display system is configured and the screen saver function is used, it is possible to provide a screen saver display with no shift in both the moving direction and the moving timing. Further, by writing a code during the blanking period of the digital video signal, the display timing can be controlled for each frame, for example. Further, it is not necessary to provide a separate control cable. Further, since the screen saver code can be written by the signal processing circuit 12 by software, for example, no dedicated circuit is required.
　また、図１における信号処理回路１２やＣＰＵ１３等の機能を実現するためのプログラムをコンピュータ読み取り可能な記録媒体に記録して、この記録媒体に記録されたプログラムをコンピュータシステムに読み込ませ、実行することにより複数の表示装置１間でスクリーンセーバー機能を同期させるようにしてもよい。なお、ここでいう「コンピュータシステム」とは、ＯＳや周辺機器等のハードウェアを含むものとする。 Also, a program for realizing the functions of the signal processing circuit 12 and the CPU 13 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Thus, the screen saver function may be synchronized among the plurality of display devices 1. Here, the “computer system” includes an OS and hardware such as peripheral devices.
　また、「コンピュータシステム」は、ＷＷＷシステムを利用している場合であれば、ホームページ提供環境（あるいは表示環境）も含むものとする。
　また、「コンピュータ読み取り可能な記録媒体」とは、フレキシブルディスク、光磁気ディスク、ＲＯＭ、ＣＤ－ＲＯＭ等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置のことをいう。さらに「コンピュータ読み取り可能な記録媒体」とは、サーバやクライアントとなるコンピュータシステム内部の揮発性メモリのように、一定時間プログラムを保持しているものを含むものとする。また上記プログラムは、前述した機能の一部を実現するためのものであっても良く、さらに前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるものであってもよい。また、上記のプログラムを所定のサーバに記憶させておき、他の装置からの要求に応じて、当該プログラムを通信回線を介して配信（ダウンロード等）させるようにしてもよい。 Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” includes a medium that holds a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. Alternatively, the program may be stored in a predetermined server, and the program may be distributed (downloaded or the like) via a communication line in response to a request from another device.
　以上、この発明の実施形態について図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計等も含まれる。例えば、ＬＣＤ１１は、有機ＥＬディスプレイ（ｏｒｇａｎｉｃ　ｅｌｅｃｔｒｏｌｕｍｉｎｅｓｃｅｎｃｅ　ｄｉｓｐｌａｙ）、プロジェクタ等の他の映像表示装置であってもよい。また、ＬＣＤ１１と信号処理装置１２との間の制御信号の伝送は、有線に限らず、無線であってもよい。 As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes a design and the like within the scope not departing from the gist of the present invention. For example, the LCD 11 may be another video display device such as an organic EL display (organic electroluminescence display) or a projector. Further, the transmission of the control signal between the LCD 11 and the signal processing device 12 is not limited to wired communication but may be wireless.
　なお、本発明の態様は、次のように示すことができる。
〈付記１〉
　映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能部と、
　所定の第１画像を移動させながら表示する第２機能部と、
　前記第１機能部と前記第２機能部との両方を動作させる場合に、前記第２機能部による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力する信号処理回路と、
　を備えることを特徴する表示装置。
〈付記２〉
　前記所定のコードが、前記映像信号のフレーム毎に書き込まれたものである
　ことを特徴する請求項１に記載の表示装置。
〈付記３〉
　前記所定のコードが、前記第１画像の移動方向と移動タイミングとを表すものである
　ことを特徴する請求項１又は２に記載の表示装置。
〈付記４〉
　前記移動状況が、所定フレーム前の前記第１画像の移動状況を基準として生成されたものである
　ことを特徴する請求項１から３のいずれか１項に記載の表示装置。
〈付記５〉
　映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能と、所定の第１画像を移動させながら表示する第２機能とを用いた表示方法であって、
　前記第１機能と前記第２機能との両方を動作させる場合に、前記第２機能による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力する
　ことを特徴する表示方法。 In addition, the aspect of this invention can be shown as follows.
<Appendix 1>
A first function unit that inputs a video signal and displays an enlarged partial image in an image based on the video signal in cooperation with another display device;
A second functional unit for displaying a predetermined first image while moving the first image;
When operating both the first function unit and the second function unit, a predetermined code representing the movement status of the first image by the second function unit is written in a blanking period of the video signal, A signal processing circuit for outputting to the other display device;
A display device comprising:
<Appendix 2>
The display device according to claim 1, wherein the predetermined code is written for each frame of the video signal.
<Appendix 3>
The display device according to claim 1, wherein the predetermined code represents a moving direction and a moving timing of the first image.
<Appendix 4>
The display device according to any one of claims 1 to 3, wherein the movement status is generated based on a movement status of the first image before a predetermined frame.
<Appendix 5>
A first function for inputting a video signal and cooperating with another display device to enlarge and display a partial image in the image based on the video signal, and a second function for displaying a predetermined first image while moving The display method used,
When operating both the first function and the second function, a predetermined code representing the movement status of the first image by the second function is written in the blanking period of the video signal, A display method characterized by outputting to a display device.
１　表示装置
１１　ＬＣＤ
１２　信号処理回路
１３　ＣＰＵ
１４　操作部
１５　入力端子
１６　出力端子
Ｃ　スクリーンセーバー用コード
Ｂ　ブランキング期間部 1 Display device 11 LCD
12 signal processing circuit 13 CPU
14 Operation part 15 Input terminal 16 Output terminal C Screen saver code B Blanking period part

Claims (5)

  1. 　映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能部と、
    　所定の第１画像を移動させながら表示する第２機能部と、
    　前記第１機能部と前記第２機能部との両方を動作させる場合に、前記第２機能部による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力する信号処理回路と、
    　を備えることを特徴する表示装置。     A first function unit that inputs a video signal and displays an enlarged partial image in an image based on the video signal in cooperation with another display device;
    A second functional unit for displaying a predetermined first image while moving the first image;
    When operating both the first function unit and the second function unit, a predetermined code representing the movement status of the first image by the second function unit is written in a blanking period of the video signal, A signal processing circuit for outputting to the other display device;
    A display device comprising:
  2. 　前記所定のコードが、前記映像信号のフレーム毎に書き込まれたものである
    　ことを特徴する請求項１に記載の表示装置。     The display device according to claim 1, wherein the predetermined code is written for each frame of the video signal.
  3. 　前記所定のコードが、前記第１画像の移動方向と移動タイミングとを表すものである
    　ことを特徴する請求項１又は２に記載の表示装置。     The display device according to claim 1, wherein the predetermined code represents a moving direction and a moving timing of the first image.
  4. 　前記移動状況が、所定フレーム前の前記第１画像の移動状況を基準として生成されたものである
    　ことを特徴する請求項１から３のいずれか１項に記載の表示装置。     The display device according to any one of claims 1 to 3, wherein the movement status is generated based on a movement status of the first image before a predetermined frame.
  5. 　映像信号を入力し、他の表示装置と協働して前記映像信号に基づく画像中の部分画像を拡大表示する第１機能と、所定の第１画像を移動させながら表示する第２機能とを用いた表示方法であって、
    　前記第１機能と前記第２機能との両方を動作させる場合に、前記第２機能による前記第１画像の移動状況を表す所定のコードを、前記映像信号のブランキング期間に書き込み、前記他の表示装置に出力する
    　ことを特徴する表示方法。     A first function for inputting a video signal and cooperating with another display device to enlarge and display a partial image in the image based on the video signal, and a second function for displaying a predetermined first image while moving The display method used,
    When operating both the first function and the second function, a predetermined code representing the movement status of the first image by the second function is written in the blanking period of the video signal, A display method characterized by outputting to a display device.
PCT/JP2012/065432 2012-06-15 2012-06-15 Display device, and display method WO2013186933A1 (en)

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JPH10207682A (en) * 1997-01-17 1998-08-07 Fujitsu Ltd Picture display system
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JPH10207682A (en) * 1997-01-17 1998-08-07 Fujitsu Ltd Picture display system
JP2001337663A (en) * 2000-05-29 2001-12-07 Oki Electric Ind Co Ltd Method, terminal unit and system for screen display
JP2006033673A (en) * 2004-07-21 2006-02-02 Victor Co Of Japan Ltd Image transmission and display system
JP2006235241A (en) * 2005-02-24 2006-09-07 Nec Display Solutions Ltd Display device and large-sized display device using the same

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