JP2011244356A - Display apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display apparatus capable of enlarging a setting screen displayed on a multiple configuration display device so as to be read from a position apart therefrom.SOLUTION: A master display 10 on the uppermost stream side specifies a display 10 which is necessary for enlarging and displaying a setting screen. Then, setting screen information for indicating a setting screen, magnified scale factor information, a display ID of the specified display, and a mode-2 command are sent to the display 10 on the downstream side, namely, a slave display. When the mode-2 command is received, and in a case where the received display ID includes an own display ID, the slave display enlarges a portion to be displayed on the own display from the setting screen indicated by the setting screen information to a magnified scale factor indicated by the magnified scale factor information to be superimposed on the image information so as to be displayed on a display device 14.

Description

  The present invention relates to a display device capable of enlarging and displaying information on a multi-display device including a plurality of display devices.

  In a multi-configuration multi-display device composed of a plurality of display devices having a liquid crystal panel (hereinafter referred to as “display”), when operating the display, the display is operated as far as possible from the display. However, the area of the menu screen displayed on the display is usually determined in accordance with the size of the display alone and the amount of information. Further, even if the display has a function of expanding the menu screen, the size of the area that can be expanded is limited by the size of the display.

  When adjusting or setting a plurality of displays, each setting menu screen is displayed on the screen of each display using a remote controller (hereinafter referred to as “remote controller”) or the like. However, in a multi-display device, in order to set while confirming the setting state of the display to be adjusted, the operation is performed away from the display so that the entire view can be seen, but if it is too far from the display, characters displayed on the setting menu screen are displayed. Smaller and harder to see. When the number of displays constituting the multi-display device increases, there is a problem that it is necessary to move away from each other in order to look over the entire display, and it becomes more difficult to see.

  There is a display device described in Patent Document 1 as a conventional technique. This display device is constituted by a display device corresponding to a plurality of displays, and displays a menu screen on one of the plurality of displays. The display size of the menu screen can be set to an arbitrary size by operating the remote controller or the main body operation unit, and the menu screen can be displayed on an arbitrary display.

JP 2006-352511 A

  In the conventional technology, a multi-configuration including a small number of displays, for example, a multi-configuration such as a 2 × 2 configuration or a 3 × 3 configuration, does not need to be far away from the display in order to look around. Therefore, the conventional technique is an effective technique because the menu screen can be viewed from the position. However, when there is a large amount of information to be displayed on the menu screen, or in a multi-configuration composed of many displays, it is necessary to move away from the display in order to see the whole. I can't. On the contrary, in order to visually recognize the display of the menu, it is necessary to approach the display, and the whole cannot be looked over. Although the display size of the menu screen can be set to an arbitrary size, it cannot be enlarged beyond the screen size of one display.

  An object of the present invention is to provide a display device that can be enlarged so that a setting screen displayed on a multi-configuration display device can be read from a remote position.

The present invention includes display means for displaying image information representing an image or setting screen information representing a setting screen for performing setting of the own apparatus, and a plurality of display means arranged adjacent to each other at predetermined positions. Including a plurality of display devices capable of enlarging image information to be displayed on one display means and displaying the information on the display means of the plurality of display devices,
Each display device
Master-slave setting means for setting one of the plurality of display devices as a master display device and setting the remaining display devices other than the master display device as slave display devices;
Specifying means for specifying a display device necessary for displaying an enlarged setting screen in which the size of the setting screen indicated by the setting screen information of the predetermined display device is enlarged to a predetermined magnification;
Transmitting means for transmitting identification information for identifying the display device specified by the specifying means, enlargement magnification information indicating a predetermined magnification, and setting screen information to the display device set as the slave display device by the master-slave setting means; ,
Receiving means for receiving identification information, magnification information and setting screen information transmitted by the transmitting means of the other display device;
When the identification information received by the receiving unit matches the identification information of the own display device, the portion of the setting screen indicated by the setting screen information received by the receiving unit is specified to be displayed on the own display device, and the specified setting And display control means for enlarging the screen portion to the magnification indicated by the enlargement magnification information received by the receiving means, and causing the display means to display enlarged setting screen partial information representing the enlarged setting screen portion. Display device.

The present invention further includes an operating device for operating the display device,
Each display device further includes an effective means for enabling the operation performed on the operation device only to the main display device,
The display control means causes the display means of the main display device to display setting screen information of the predetermined display device,
The predetermined magnification is a magnification set by an operating device in response to a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means.

In the present invention, the setting screen indicated by the setting screen information includes a selection item for selecting one display device from the plurality of display devices,
The predetermined display device is a display device set by an operation device in response to a selection item of a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means. And

In the present invention, the display means includes a liquid crystal panel and a frame portion provided on the periphery of the liquid crystal panel,
Of the image information and the setting screen information, frame correction means for performing frame correction so that only the image information is displayed on the frame portion is included.

  According to the present invention, each of the plurality of display devices has display means for displaying image information representing an image or setting screen information representing a setting screen for performing setting of the own device, and is adjacent to each other in advance. It is arranged at a predetermined arrangement position. The plurality of display devices can enlarge and display image information to be displayed on one display unit on the display unit of the plurality of display units. Each display device further includes a master / slave setting unit, a specifying unit, a transmitting unit, a receiving unit, and a display control unit. The master-slave setting unit sets one of the plurality of display devices as a main display device, and sets the remaining display devices other than the main display device as a slave display device. The specifying means specifies a display device necessary for displaying an enlarged setting screen in which the size of the setting screen indicated by the setting screen information of the predetermined display device is enlarged to a predetermined magnification. The transmitting means transmits identification information for identifying the display device specified by the specifying means, enlargement magnification information indicating a predetermined magnification, and setting screen information to the display device set to the slave display device by the master-slave setting device. To do. The receiving unit receives the identification information, the magnification information, and the setting screen information transmitted by the transmitting unit of the other display device. When the identification information received by the receiving means matches the identification information of the own display device, the display control means is a portion to be displayed on the own display device in the setting screen indicated by the setting screen information received by the receiving means. , The specified setting screen portion is enlarged to the magnification indicated by the enlargement magnification information received by the receiving means, and the enlarged setting screen portion information representing the enlarged setting screen portion is displayed on the display means. Therefore, the setting screen displayed on the multi-configuration display device can be enlarged so that it can be read from a remote position.

  According to the invention, the operating device operates the display device. The effective means enables each display device to perform an operation performed on the operation device only on the main display device. The display control means causes the display means of the main display device to display the predetermined setting screen information of the display device. The predetermined magnification is a magnification set by the operating device in response to a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means. Therefore, even if the display device is composed of a plurality of display devices, the enlargement magnification can be designated for one display device by the operation device.

  According to the invention, the setting screen indicated by the setting screen information includes a selection item for selecting one display device from the plurality of display devices. The predetermined display device is a display device set by an operating device in response to a selection item of a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means. Therefore, even if the display device is composed of a plurality of display devices, one display device can be selected as the display to be adjusted by the operation device.

  According to the invention, the display means includes a liquid crystal panel and a frame portion provided on the periphery of the liquid crystal panel. Then, the frame correction means performs frame correction so that only the image information of the image information and the setting screen information is displayed on the frame portion. Therefore, it is possible to prevent the image information from being extended and to prevent loss of character information such as setting items and setting information displayed on the setting screen.

It is a block diagram which shows the structure and connection of the multi-display apparatus 1 which is one Embodiment of this invention. 2 is a block diagram showing a configuration of a display 10. FIG. It is a figure which shows the connector of RS-232C input connection part 18 and RS-232C output connection part 19. FIG. 3 is a block diagram showing a configuration of a scaler unit 11. FIG. It is a figure for demonstrating frame correction. 2 is an external view of a remote control 30. FIG. 4 is a diagram for explaining the operation of the multi-display device 1 by the remote controller 30. FIG. It is a figure which shows the example of a screen displayed on a master display and a slave display. It is a figure which shows an example of the adjustment menu screen 40 of display ID. It is a figure for demonstrating the change of the color of the display ID information. It is a figure which shows an example of the adjustment menu screen 40c after the background of the display ID information 41 was changed into red. It is a figure for demonstrating switching from the adjustment menu screen 40c to the expansion menu screen 42. FIG. It is a figure for demonstrating the change of the setting screen accompanying a MENU button press. It is a figure which shows an example of the enlarged menu screen 42a expanded by operation by the enlarged menu screen 42. FIG. 3 is a circuit diagram for controlling validity / invalidity of a remote controller 30. FIG. 5 is a diagram illustrating an example of an enlarged menu screen 44. FIG. It is a figure which shows the example of a display before and behind expansion. It is a figure for demonstrating frame correction with respect to a setting screen. It is a flowchart which shows the process sequence of the master slave determination process which CPU21 performs.

It is a flowchart which shows the process sequence of the master process which CPU21 of a master display performs.

It is a flowchart which shows the process sequence of the slave process which CPU21 of a slave display performs. It is a flowchart which shows the process sequence of the magnification / start point information processing which CPU21 performs. It is a flowchart which shows the process sequence of the target display specific process which CPU21 performs. It is a flowchart which shows the process sequence of the enlarged display process which CPU21 performs.

  FIG. 1 is a block diagram showing the configuration and connection of a multi-display device 1 according to an embodiment of the present invention. The multi-display device 1 that is a display device includes a plurality of display devices (hereinafter referred to as “displays”) 10 and a remote controller (hereinafter referred to as “remote control”) 30 described later.

  The multi-display device 1 shown in FIG. 1 has a configuration in which nine displays 10 are arranged in three rows on the left and right in three stages (hereinafter referred to as “3 × 3 configuration”). Hereinafter, when it is necessary to distinguish each display 10, subscripts “a” to “i” are attached to the reference mark “10” of the display 10 to distinguish each display 10 and are common to the displays 10a to 10i. If it is not necessary to distinguish, the display 10 is used.

  The display 10 includes an RS-232C (Recommended Standard 232 version C) input connection unit 18 and an RS-232C output connection unit 19. RS-232C is the name of the serial communication standard. The RS-232C input connection unit 18 and the RS-232C output connection unit 19 are also distinguished from each other by adding subscripts “a” to “i”. The displays 10a to 10i include RS-232C input connection portions 18a to 18i and RS-232C output connection portions 19a to 19i, respectively. The RS-232C input connection unit 18 that is a receiving unit includes a connector for inputting a signal and a reception unit that receives information. The RS-232C output connection unit 19 serving as a transmission unit includes a connector for outputting a signal and a transmission unit for transmitting information. The reception unit sends the received information to the scaler unit 11, and the transmission unit transmits the information received from the scaler unit 11.

  The RS-232C input connection unit 18 is connected to the other end of the RS-232C connection cable whose one end is connected to the RS-232C output connection unit 19 of the upstream display 10. The connection with the RS-232C connection cable is a daisy chain connection. In the multi-display device 1, the connection configuration and the connection order are defined in advance. For example, the display on the right side is sequentially displayed starting from the display 10 in the uppermost leftmost column toward the display screen of the multi-display device 1. The display 10 in the rightmost column is connected to the display 10 in the leftmost column in the next stage, and is connected to the display 10 in the rightmost column in the lowermost stage as the end point. Although an example in which a connection configuration is defined will be described below, information indicating the connected configuration may be set in each display by enabling free connection without providing a definition. The predetermined connection configuration and connection order are predetermined arrangement positions.

  In the multi-display device 1 shown in FIG. 1, the RS-232C output connection unit 19a and the RS-232C input connection unit 18b are connected by the RS-232C connection cable K1, and the RS-232C connection cable K2 -232C output connection portion 19b and RS-232C input connection portion 18c are connected, and thereafter, similarly to the RS-232C connection cable K8, the RS-232C output connection portion 19 of the upstream display 10 and the downstream side The RS-232C input connection unit 18 of the display 10 is connected.

  FIG. 2 is a block diagram showing the configuration of the display 10. In addition to the RS-232C input connection unit 18 and the RS-232C output connection unit 19 described above, the display 10 includes a scaler unit 11, a first memory 12, a second memory 13, a display unit 14, a light receiving unit 15, and an image signal input. Unit 16 and a local area network (abbreviated as LAN) connection unit 17.

  The scaler unit 11 includes an integrated circuit unit including a central processing unit (hereinafter referred to as “CPU”) 21, a display control circuit unit 22, and an on-screen display (abbreviated as OSD) circuit unit 23, which will be described later. Is done. The first memory 12 is constituted by, for example, a semiconductor memory, and stores information such as cable check (hereinafter referred to as “Cable_ck”) register information described later, enlargement magnification information described later, start point information described later, and a display ID. The display ID is identification information for identifying each display device. The second memory 13 is configured by, for example, a semiconductor memory, and stores a control program executed by the CPU, information on the multi-display device 1, information on RS-232C, and the like. Information is written to the first memory 12 and the second memory 13 and information is read from the first memory 12 and the second memory 13 by the CPU.

  The display device 14 that is a display means is constituted by a liquid crystal panel, for example, and displays information such as image information received from the scaler unit 11 on the liquid crystal panel. The light receiving unit 15 receives an optical signal transmitted from a remote controller 30 described later, and sends information represented by the optical signal to the scaler unit 11.

The image signal input unit 16 includes a connector to which an image signal input from an external device is input. An image signal input from an external device is, for example, an analog signal output from a personal computer, a DVI (Digital Visual Interface) signal or a display port (DisplayPort) signal, a composite signal output from an audio / video device, a component signal, or HDMI (High-Definition Multimedia
Interface) signal. The LAN connection unit 17 includes a connector for connecting a LAN cable, and controls transmission / reception of information via the LAN. The LAN connection unit 17 sends information to be received to the scaler unit 11 and transmits information received from the scaler unit 11.

  FIG. 3 is a diagram illustrating connectors of the RS-232C input connection unit 18 and the RS-232C output connection unit 19. The connector of the RS-232C input connection unit 18 includes terminals A1 to A9, and the connector of the RS-232C output connection unit 19 includes terminals B1 to B9.

  The terminal A9 of the connector of the RS-232C input connection portion 18 is connected to the other end of the first resistance element R1 whose one end is connected to the ground and the scaler portion 11. A signal from the terminal A9 to the scaler unit 11 is a Cable_ck signal. The terminal B9 of the connector of the RS-232C output connection unit 19 is connected to the cathode of a diode D whose anode is connected to a power source, for example, a + 5V power source. The first resistance element R1, the diode D, the RS-232C input connection unit 18, and the RS-232C output connection unit 19 are master-slave setting units.

  When the connector of the RS-232C input connection unit 18 is connected to the connector of the upstream RS-232C output connection unit 19 by the connection cable for RS-232C, the terminal A9 of the connector of the RS-232C input connection unit 18 is upstream. It is connected to the terminal B9 of the connector of the RS-232C output connection portion 19 on the side. When the terminal A9 is connected to the terminal B9, the terminal B9 is connected to the power supply via the diode D, so the Cable_ck signal is a voltage obtained by subtracting the voltage drop of the diode D from the voltage of the power supply (hereinafter referred to as “high level”). )become. When the connector of the RS-232C input connecting portion 18 is not connected to the connector of the upstream RS-232C output connecting portion 19 by the RS-232C connecting cable, the terminal A9 is connected to the ground by the first resistance element R1. Therefore, the Cable_ck signal becomes a ground voltage (hereinafter referred to as “low level”).

  Therefore, the scaler unit 11 knows that the own display 10 is connected to the upstream display 10 and the own display 10 is downstream when the Cable_ck signal is at a high level. Further, when the Cable_ck signal is at a low level, it can be seen that the other display 10 is not connected to the upstream side of the own display 10 and the own display 10 is the most upstream side. When the Cable_ck signal is at the high level, the scaler unit 11 stores “1” indicating that the Cable_ck signal is at the high level as the Cable_ck register information in the first memory 12, and when the Cable_ck signal is at the low level. , “0” indicating that the Cable_ck signal is at a low level is stored in the first memory 12 as the Cable_ck register information.

  The most upstream display 10 is a main display (hereinafter referred to as “master display”), and all the other displays 10 on the downstream side of the master display are slave displays (hereinafter referred to as “slave displays”). The master display, which is the main display device, transmits an automatic ID distribution command (to be described later) to the downstream slave display in order to determine the display ID. The slave display which is the slave display device that has received the automatic ID distribution command determines each display ID and transfers the automatic ID distribution command to the downstream slave display.

  The terminals A2 and A3 of the connector of the RS-232C input connection unit 18 and the terminals B2 and B3 of the connector of the RS-232C output connection unit 19 are serial communication terminals and are connected to the scaler unit 11. A signal from the terminal A3 to the scaler unit 11 is an RS232C_in_TxD signal, and a signal from the terminal A2 to the scaler unit 11 is an RS232C_in_RxD signal. A signal from the scaler unit 11 to the terminal B3 is an RS232C_out_RxD signal, and a signal from the scaler unit 11 to the terminal B2 is an RS232C_out_TxD signal.

  FIG. 4 is a block diagram illustrating a configuration of the scaler unit 11. The scaler unit 11 is configured by an integrated circuit unit including a CPU 21, a display control circuit unit 22, and an OSD circuit unit 23. The CPU 21 executes the control program stored in the second memory 13 to control the display control circuit unit 22 and the OSD circuit unit 23, as well as the display 14, the light receiving unit 15, the image signal input unit 16, and the LAN connection. Control unit 17, RS-232C input connection unit 18 and RS-232C output connection unit 19. The display control circuit unit 22 includes a frame correction unit 221, an enlargement processing unit 222, and an OSD superimposing unit 223.

  FIG. 5 is a diagram for explaining frame correction. FIG. 5A is a display example in which frame correction is not performed when image information representing an image is displayed at twice magnification, and FIG. 5B is a display example in which frame correction is performed. .

  The unenlarged image information is displayed on one display 10 frame by frame. When enlarging an image twice, the vertical and horizontal lengths are each doubled, so that one frame of the image is divided into four, and the four displays 10 adjacent to the vertical two rows and two columns are An image of each divided part (hereinafter referred to as “divided image”) is displayed. In the example shown in FIG. 5, an example of displaying on four displays 10 a, 10 b, 10 d, and 10 e is shown. FIG. 5 shows the respective indicators 14a, 14b, 14d, and 14e of the four displays 10a, 10b, 10d, and 10e. Each display 14 includes a liquid crystal panel 101 and a frame portion 102. The frame portion 102 is provided on the periphery of the liquid crystal panel 101 so as to surround the liquid crystal panel 101, and holds the liquid crystal panel 101.

  Each divided image obtained by dividing one frame image into four is specified by video position information and video coordinate data. The video position information is information indicating the position of the divided image in one frame image, and is indicated by what column and which level. Specifically, the position of the divided image at the k-th stage in the j-th column is represented by “j × k”. Therefore, when divided into four, 1 × 1 represents a divided image at the position of the first row of the first column, and 2 × 1 is at the position of the first row of the second column. Represents a divided image, 1 × 2 represents a divided image at the second row position of the first column, and 2 × 2 represents a divided image at the second row position of the second column. It represents that.

  Video coordinate data is data representing the cut-out coordinates of a divided image. Specifically, among the pixels constituting one frame image, when the position of the upper left pixel is the origin, the right direction is the X coordinate direction, and the lower direction is the Y coordinate direction, the video coordinate data of the divided image is The coordinates of the start point representing the position of the upper left pixel of the divided image and the coordinates of the end point representing the position of the lower right pixel of the divided image. When performing frame correction, the video coordinate data is represented by the start point and end point of an image (hereinafter referred to as “corrected divided image”) composed of pixels excluding pixels hidden in the frame portion 102 from pixels constituting the divided image. The

  For example, when the number of pixels in one frame after being doubled is 1920 pixels in the X coordinate direction and 1080 pixels in the Y coordinate direction, and the width of the frame portion 102 is 25 pixels, the video position information is 1 × 1. The image coordinate data of the post-correction divided image is that the start point is represented by coordinates (25, 25), the end point is represented by coordinates (934, 515), and the video position information is 2 × 1. In the video coordinate data, the start point is represented by coordinates (984, 25), the end point is represented by coordinates (1894, 514), and the video coordinate data of the post-correction divided image whose video position information is 1 × 2 is the start point. The image coordinate data of the post-correction divided image having the coordinates (25,565), the end point represented by the coordinates (934,1054), and the image position information of 2 × 2, the start point is the coordinates (985,565). The end point is the coordinate (1894, Represented by 054).

  In response to an instruction from the CPU 21, the frame correction unit 221 that is a frame correction unit displays image information represented by an image signal sent from the image signal input unit 16. The discontinuity is corrected, and the corrected image information is sent to the enlargement processing unit 222. In FIG. 5A, since the frame correction is not performed, the images displayed on the adjacent liquid crystal panel 101 appear to be discontinuous on both sides of the frame portion 102. In FIG. 5B, the frame correction unit 221 corrects the image so that it is hidden behind the frame portion 102, so that both sides of the frame portion 102 are the frame portions 102 and the images appear to be continuous.

  The enlargement processing unit 222 enlarges the image information received from the frame correction unit 221 at an enlargement magnification instructed by the CPU 21, and sends the enlarged image information to the OSD superimposing unit 223. The OSD superimposing unit 223 superimposes the setting screen information received from the OSD enlargement processing unit 233 on the image information received from the enlargement processing unit 222, and sends the superimposed image information to the display unit 14. Superposition is to synthesize the image information and the setting screen information and replace the image information at the position where the setting screen information is displayed with the setting screen information.

  The OSD circuit unit 23 includes an OSD generation unit 231 and an OSD enlargement processing unit 232. In response to an instruction from the CPU 21, the OSD generation unit 231 generates setting screen information for OSD display based on the OSD coordinate data and the OSD position information received from the CPU 21, and the generated setting screen information is displayed in the OSD enlargement processing unit 232. Send to. OSD coordinate data and OSD position information correspond to video coordinate data and video position information for image information, respectively. However, as will be described later, when frame correction is not performed on the setting screen, for example, the OSD coordinate data for the divided setting screen that is a setting screen divided into four has OSD position information of 1 × 1. For the division setting screen, the start point is represented by coordinates (0, 0) and the end point is represented by coordinates (959, 539). Further, the OSD coordinate data of the division setting screen with the OSD position information of 2 × 1 indicates that the start point is represented by coordinates (960, 0), the end point is represented by coordinates (1919, 539), and the OSD position information is 1 ×. The OSD coordinate data of the division setting screen, which is 2, the start point is represented by coordinates (0,540), the end point is represented by coordinates (959,1079), and the OSD position information is OSD position information 2D2. In the coordinate data, the start point is represented by coordinates (960, 540) and the end point is represented by coordinates (1919, 1079). The OSD enlargement processing unit 232 enlarges the setting screen information received from the OSD generation unit 231 at an enlargement magnification instructed by the CPU 21, and sends the enlarged setting screen information to the OSD superimposing unit 223. The CPU 21 is a specifying unit and a display control unit.

  FIG. 6 is an external view of the remote controller 30. The remote controller 30 as an operation device is a device for operating the display 10 and transmits operation information for operating the display 10 to the display 10 as an optical signal.

  The remote controller 30 as an operation device includes operation buttons such as a POWER button 31, an INPUT button 32, a MUTE button 33, a MENU button 34, a DISPLAY button 35, a MODE button 36, a SIZE button 37, and a cursor button 38. The POWER button 31 is an operation button for turning on or off the display 10. The INPUT button 32 is an operation button for switching a signal selected from among a plurality of signals input to the image signal input unit 16. The MUTE button 33 is an operation button for stopping or restarting audio output. The MENU button 34 is an operation button for displaying the setting screen and switching the setting screen. The DISPLAY button 35 is an operation button for displaying information related to the display 10. The MODE button 36 is an operation button for switching the color mode. The SIZE button 37 is an operation button for switching the screen size. The cursor button 38 is an operation button for moving the cursor displayed on the screen up, down, left and right, instructing increase / decrease in volume, and instructing increase / decrease in luminance.

  FIG. 7 is a diagram for explaining the operation of the multi-display device 1 by the remote controller 30. The remote controller 30 can operate by transmitting operation information to any of the displays 10. However, in order to limit the operation target to one display 10, control is performed so that operation information can be transmitted only to the master display, as will be described later with reference to FIG. Therefore, the remote controller 30 cannot transmit operation information to the slave display.

  The multi-display device 1 shown in FIG. 7 is connected with the configuration shown in FIG. 1 by a connection cable for RS-232C, the display 10a is a master display, and the displays 10b to 10i are slave displays. Therefore, the remote controller 30 can transmit operation information only to the display 10a which is a master display.

  FIG. 8 is a diagram illustrating an example of a screen displayed on the master display and the slave display. In the following, a case where the setting screen is enlarged and displayed three times will be described as an example. When the MENU button 34 of the remote controller 30 is pressed, operation information indicating that the MENU button 34 is pressed is transmitted to the display 10a that is a master display.

  The display 10a which is a master display displays the adjustment menu screen 40 of the own display 10a on the center of the liquid crystal panel 101 of the own display 10a. The displays 10b to 10i, which are slave displays, display display ID information 41b to 41i representing the display ID of the own display on the upper left of each liquid crystal panel 101.

  As described above, the adjustment menu screen 40 is displayed on the master display, and the display ID information 41 representing the respective display IDs is displayed on the slave display. Therefore, the adjuster has which display at which position. Can be recognized, and the complexity of adjusting the display 10 can be improved.

  FIG. 9 is a diagram illustrating an example of the display ID adjustment menu screen 40. The adjustment menu screen 40 displays an adjustment menu 401 (denoted as “ADJUSTMENT MENU” in the figure) 401 that is the title of the screen and OSD information stored in the first memory 12 of the display 10 itself. The OSD information is setting screen information representing the adjustment menu screen 40. For example, the display ID (denoted as “DISPLAY ID”) 402, manual or automatic (denoted as “MANUAL AUTO” in the diagram) 407, contrast (in the diagram). For example, “BLACK LEVEL” 403, black level (“CONTRAST” in the figure) 404, color (“COLOR” in the figure) 405, white balance (in the figure “WHITE BALANCE”) 406, etc. This is information set in the display 10.

  In the configuration shown in FIG. 1, the display ID of each display 10 is “1” for the display 10a, “2” for the display 10b, “3” for the display 10c, and “4” for the display 10d. Yes, the display 10e is “5”, the display 10f is “6”, the display 10g is “7”, the display 10h is “8”, and the display 10i is “9”. The item of display ID is a selection item. The display 10 having the display ID set in the “DISPLAY ID” 402 which is the display ID of the adjustment menu screen 40 is a predetermined display device.

  FIG. 9A is an example of the adjustment menu screen 40a of the display 10a displayed on the liquid crystal panel 101 of the display 10a. The display ID 402 of the adjustment menu screen 40a is “1”. FIG. 9B shows the display ID 402 of the adjustment menu screen 40a in response to the adjustment menu screen 40a displayed on the liquid crystal panel 101 of the display 10a which is the master display. It is an example of the adjustment menu screen 40b in the state changed to “9”. In the adjustment menu screen 40b, the display ID 402 is “9”, but the other OSD information remains the OSD information of the display 10a.

  FIG. 10 is a diagram for explaining a change in the color of the display ID information 41. FIG. 10A shows display ID information 41i1 displayed on the liquid crystal panel 101 of the display 10i which is a slave display when the adjustment menu screen 40a of the display 10a is displayed on the liquid crystal panel 101 of the display 10a. The display ID information 41i1 is displayed with, for example, a blue background color.

  FIG. 10B shows display ID information 41i2 displayed on the liquid crystal panel 101 of the display 10i which is a slave display when the adjustment menu screen 40b of the display 10i is displayed on the liquid crystal panel 101 of the display 10a. The display ID information 41i2 is displayed with, for example, a red background color. Thus, by changing the color of the display ID information 41 from blue to a conspicuous red, the adjustment menu screen 40 of the display 10 on which the red display ID information 41 is displayed is displayed on the display 14 of the master display. Can make it easier to understand.

  FIG. 11 is a diagram illustrating an example of the adjustment menu screen 40c after the background of the display ID information 41 is changed to red. FIG. 11 is an adjustment menu screen 40b shown in FIG. 9B. After the display ID 402 is changed from “1” to “9” by the remote controller 30, it is displayed on the display 14 of the display 10a which is a master display. It is an example of the adjustment menu screen 40c of the display 10i to be performed.

  The display 10 a that is a master display acquires the OSD information of the display 10 i from the display 10 i with the display ID “9” changed on the adjustment menu screen 40 b, and stores the acquired OSD information in the first memory 12. Also, the acquired OSD information is reflected on the adjustment menu screen 40b, the adjustment menu screen 40c is displayed, and the cursor 408 is moved from the display ID 402 to “MANUAL” of “MANUAL AUTO” 407 which is manual or automatic. In the adjustment menu screen 40c shown in FIG. 11, the display ID is “9”, and the OSD information other than the display ID is also updated to the OSD information of the display 10i. Furthermore, the display 10a which is a master display transfers the acquired OSD information to the slave display in order to share the updated OSD information with the slave display. The slave display stores the transferred OSD information in each first memory 12.

  FIG. 12 is a diagram for explaining switching from the adjustment menu screen 40 c to the enlarged menu screen 42. FIG. 12A is the same as the adjustment menu screen 40c shown in FIG. When the MENU button 34 of the remote controller 30 is pressed in a state where the adjustment menu screen 40c is displayed on the display 10a that is the master display, the display 14 of the display 10a that is the master display is shown in FIG. The enlarged menu screen 42 is displayed.

  On the enlarged menu screen 42, an enlarged menu (denoted as “EXPAND MENU” in the figure) 421 which is the title of the screen and enlarged information stored in the first memory 12 of the display 10 are displayed. The enlarged information is setting screen information representing the enlarged menu screen 42. For example, the display ID (denoted as “DISPLAY ID” in the figure) 422, the horizontal size (denoted as “H-SIZE” in the figure) 423, and the vertical size (depicted in the figure). , “V-SIZE” 424, image enlargement (denoted as “IMAGE EXPAND” in the figure) 425, OSD magnification (denoted as “OSD EXPAND” in the figure) 426, OSD display start point ID (“OSD POSITION” in the figure) This is information set in the display 10 for 427 and the like. The OSD magnification information indicating the OSD magnification is a predetermined magnification and is also referred to as enlargement magnification information.

  FIG. 13 is a diagram for explaining a change in the setting screen when the MENU button 34 is pressed. In a state where no setting screen is displayed, the process proceeds to step R1. In step R1, when the MENU button 34 is pressed while the setting screen is not displayed, the process proceeds to step R2, and in step R2, the adjustment menu screen 40 is displayed. In step R3, when the MENU button 34 is pressed while the adjustment menu screen 40 is displayed, the process proceeds to step R4. In step R4, the enlarged menu screen 42 is displayed. In step R5, when the MENU button 34 is pressed while the enlarged menu screen 42 is displayed, the process proceeds to step R6. In step R6, the display of the enlarged menu screen 42 is erased and any setting screen is displayed. It will be in a state that is not. The adjustment menu screen 40 and the enlarged menu screen 42 are setting screens.

  FIG. 14 is a diagram showing an enlarged menu screen 42a enlarged by an operation on the enlarged menu screen 42. As shown in FIG. When “OSD EXPAND” 426 that is the OSD magnification of the enlarged menu screen 42 is set to “3” by the remote controller 30 on the enlarged menu screen 42 shown in FIG. 12B, the enlarged menu shown in FIG. An enlarged menu screen 42 a obtained by enlarging the screen 42 three times is displayed on the multi-display device 1.

  FIG. 15 is a circuit diagram for controlling validity / invalidity of the remote controller 30. The display 10 further includes a second resistance element R2, an OR circuit 25 that is an OR circuit, and drivers 26 and 27. The output of the light receiving unit 15 is connected to one input terminal of the logical sum circuit 25, and the IR_EN signal output from the scaler unit 11 is connected to the other input terminal of the logical sum circuit 25, and the output of the logical sum circuit 25. The terminal is connected to the scaler unit 11. The other input terminal of the OR circuit 25 is connected to the other end of the second resistance element R2 having one end connected to the ground. The second resistance element R2 and the OR circuit 25 are effective means.

  The display 10a, which is a master display, sets the IR_EN signal to a low level. When the IR_EN signal is at a low level, the light receiving unit 15 can send information represented by the optical signal received from the remote controller 30 to the scaler unit 11. The displays 10b to 10i that are slave displays set the IR_EN signal to a high level. When the IR_EN signal is at a high level, the output of the OR circuit 25 is always at a high level, and the light receiving unit 15 cannot send information represented by the optical signal received from the remote controller 30 to the scaler unit 11.

  That is, the scaler unit 11 makes it effective to receive operation information from the remote controller 30 by setting the IR_EN signal to a low level, and receives operation information from the remote controller 30 by setting the IR_EN signal to a high level. Can be invalidated. Therefore, only the master display can receive the operation information obtained by operating the remote controller 30, so that the slave display can be prevented from being operated simultaneously.

  FIG. 16 is a diagram illustrating an example of the enlarged menu screen 44. FIG. 17 is a diagram illustrating a display example before and after enlargement. The operation of each display 10 when the enlargement magnification is changed will be described with reference to FIGS. In the enlarged menu screen 44, a display with a display ID “4” is set as the display 10 to be adjusted.

  The enlarged menu screen 44 shown in FIG. 16 shows a state in which “OSD EXPAND” 426 that is the OSD magnification of the enlarged menu screen 44 is changed from “1” to “2” on the remote controller 30. FIG. 17 is a diagram illustrating a display example before and after enlargement. FIG. 17A shows a state where the enlarged menu screen 44a is displayed on the display 10a when “2” is input to the OSD magnification “OSD EXPAND” 426, and the setting change is still completed. The enlarged menu screen 44a is not enlarged. FIG. 17B shows a state in which the OSD magnification is changed to “2” and the enlarged menu screen 44b enlarged twice is displayed on the displays 10a, 10b, 10d, and 10e.

  The display 10a, which is a master display, specifies the display 10 necessary for displaying the enlarged enlarged menu screen 44b. If the OSD magnification is set to “2”, the enlargement menu screen 44a is enlarged twice, so that four displays 10 are necessary. Since the OSD display start point ID “OSD POSITION” 427 on the enlarged menu screen 44a is “1”, the display that is the starting point is the display 10a that is the master display. In order to display the enlarged menu screen 44b that is doubled from the display 10a, the display 10a and the displays 10b, 10d, and 10e adjacent to the display 10a are required. 10a, 10b, 10d, and 10e are specified as necessary displays 10.

  The display 10a transmits the identified display ID of the display 10 and enlarged information representing the enlarged menu screen 44b to the slave display. The display 10a generates a portion to be displayed on the display unit 14 of the display 10a in the enlarged enlarged menu screen 44b, and causes the display unit 14 to display the generated portion of the enlarged menu screen 44b. Among the slave displays that have received the display ID and the enlarged information, the display 10 in which any one of the received display IDs matches the own display ID stores the received enlarged information in the first memory 12, Based on the received enlarged information, a portion to be displayed on the display unit 14 of the own display 10 in the enlarged enlarged menu screen 44b is generated, and the generated portion of the enlarged menu screen 44b is displayed on the display unit 14. The OSD information and the enlarged information are setting screen information. In the enlarged setting screen, information indicating a portion to be displayed on the display 14 of each display 10 is enlarged setting screen partial information.

  When displaying image information for each frame, the display 10a stores OSD information in the first memory 12 in order to synchronize with the video display timing. By storing in the first memory 12, the OSD information is read out in synchronization with the video timing. The enlargement menu screen 44 can be operated in the same way as when the adjuster is a single display that is not multi-configured. However, the display 10a only adjusts information that has been changed by operating the remote controller 30 among the enlargement information. To the display 10. The display 10 to be adjusted that has received the changed information updates the enlarged information stored in the first memory 12 based on the received changed information. Each display 10 reads the OSD information and the enlarged information from the first memory 12 in the frame period, and displays the adjustment menu screen or the enlarged menu screen based on the read OSD information and the enlarged information. The menu screen is updated and displayed on a new setting screen at regular intervals. The period of the frame is a period for updating the frame, for example, a period of 60 Hz, but the frequency is changed according to the application.

  FIG. 18 is a diagram for explaining frame correction for the setting screen. The display control circuit unit 22 performs frame correction by the frame correction unit 221 so that the image appears to be hidden by the frame correction unit 221 in order to eliminate the lengthwise and horizontal extension of the image by the frame unit 102. An image 46 a shown in FIGS. 18A and 18B is a corrected image corrected by the frame correction unit 221, and the image appears to be hidden by the frame portion 102.

  However, when the frame correction is performed on the setting screen, a part of the character information indicating the setting item, the setting content, etc., for example, “DISPLAY ID” which is a display ID, as in the adjustment menu screen 45a shown in FIG. "402" and white balance "WHITE BALANCE" 406 and a part of character information representing their contents are hidden on the frame portion 102 and are not displayed, which hinders the setting operation. The OSD enlargement processing unit 232 enlarges the setting screen information on the setting screen such as the adjustment menu screen or the enlargement menu screen without performing frame correction. FIG. 18B shows an enlarged adjustment menu screen 45b without performing frame correction by the OSD enlargement processing unit 232, and setting items and setting contents displayed on the adjustment menu screen 45b, for example, display IDs. Missing character information representing items such as “DISPLAY ID” 402 and white balance “WHITE BALANCE” 406 and the like does not occur.

  FIG. 19 is a flowchart showing a processing procedure of master slave determination processing executed by the CPU 21. When the display 10 is turned on and becomes operable, the process proceeds to step A1.

  In step A <b> 1, the CPU 21 stores the Cable_ck logic in the first memory 12. Specifically, the CPU 21 stores “1” as the Cable_ck register information in the first memory 12 when the Cable_ck signal is high level, and sets “0” as the Cable_ck register information when the Cable_ck signal is low level. Store in the first memory 12. In step A2, the CPU 21 determines whether or not the Cable_ck logic is “1”. If the Cable_ck register information stored in the first memory 12 is not “1”, it is determined that the Cable_ck logic is not “1”, and the process proceeds to Step A3. If the Cable_ck register information stored in the first memory 12 is “1”, it is determined that the Cable_ck logic is “1”, and the process proceeds to Step A5.

  In step A3, the CPU 21 validates the signal of the light receiving unit 15 by outputting IR_EN = 0. That is, by setting the IR_EN signal to a low level, the operation information represented by the optical signal received by the light receiving unit 15 is sent to the CPU 21 of the scaler unit 11. In step A4, the CPU 21 determines to operate the own display as a master display. In step A5, the CPU 21 invalidates the signal of the light receiving unit 15 by outputting IR_EN = 1. That is, by setting the IR_EN signal to a high level, the operation information represented by the optical signal received by the light receiving unit 15 is prevented from being sent to the CPU 21 of the scaler unit 11. In step A6, the CPU 21 determines to operate its own display as a slave display.

  FIG. 20 is a flowchart showing a processing procedure of master processing executed by the CPU 21 of the master display. After step A4 shown in FIG. 19, the process proceeds to step A10.

  In step A10, the CPU 21 determines whether or not an ID has been set. When the display ID stored in the first memory 12 is not “0”, it is determined that the ID has been set, and the process proceeds to Step A13. When the display ID stored in the first memory 12 is “0”, it is determined that the ID has not been set, and the process proceeds to step A11. In step A11, the CPU 21 sets the display ID of the own display 10 to “1”. That is, “1” is stored as the display ID stored in the first memory 12.

  In step A <b> 12, the CPU 21 transmits an automatic ID distribution command (hereinafter referred to as “distribution command”) and a display ID “1” to the downstream display 10. The automatic ID distribution command is a command for instructing the slave display to allocate its own display ID. The slave display that has received the automatic ID distribution command adds a value obtained by adding “1” to the received display ID. The display ID is confirmed, and the confirmed display ID is stored in the first memory 12, and the automatic ID distribution command and the confirmed display ID are transmitted to the slave display further downstream. The slave display to which the downstream slave display is not connected determines the display ID of its own display 10, stores the determined display ID in the first memory 12, and then sequentially completes the automatic ID distribution command via the upstream slave display. And send it to the master display. When the master display receives the end of the automatic ID distribution command, the master display can recognize that the display IDs of all the displays 10 have been determined and the display ID allocation has been completed.

  In step A13, the CPU 21 determines whether or not a MENU operation has been performed. When operation information indicating that the MENU button 34 has been operated by the remote controller 30 is received from the light receiving unit 15, it is determined that the MENU operation has been performed, and the process proceeds to Step A14. If operation information indicating that the MENU button 34 is operated by the remote controller 30 is not received from the light receiving unit 15, it is determined that the MENU operation has not been performed, and the process returns to Step A13.

  In step A14, the CPU 21 sets the mode to “1”. That is, the mode is stored in the first memory 12, and the CPU 21 sets the stored mode to “1” and sets the mode 1. Mode 1 is a mode for displaying the own display 10, and the slave display sets the own display 10 to mode 1 when receiving the mode 1 command. Mode 2 is an enlarged display mode, and the slave display sets its own display 10 to mode 2 when receiving the mode 2 command. Mode 3 is a mode for erasing the OSD, and the slave display sets its own display 10 to mode 3 when receiving the mode 3 command.

  In step A15, the CPU 21 performs OSD display of setting information, that is, OSD information. That is, the CPU 21 causes the OSD circuit unit 23 to generate adjustment menu screen information based on the OSD information stored in the first memory 12, and sends the generated adjustment menu screen information to the OSD superimposing unit 223. The OSD superimposing unit 223 causes the adjustment menu screen information to be superimposed on the image information and displayed on the display unit 14.

  In step A16, the CPU 21 transmits a mode 1 command to the downstream slave display. The mode 1 command is a command for setting the slave display to mode 1. In step A <b> 17, the CPU 21 determines what is the operation with the remote controller 30. When the operation information from the light receiving unit 15 indicates that the operation on the remote controller 30 is an input of a display ID, the process proceeds to step A18. When the operation information from the light receiving unit 15 indicates that the operation on the remote controller 30 is a press of the MENU button 34, the process proceeds to step A30.

  In step A18, the CPU 21 determines whether or not the display ID included in the operation information indicating that the operation on the remote controller 30 is an input of the display ID matches the own display ID. When it coincides with its own display ID, it proceeds to step A22, and when it does not coincide with its own display ID, it proceeds to step A19. In step A19, the CPU 21 transmits the setting information acquisition command and the input display ID to the downstream slave display. The setting information acquisition command is a command that causes the display 10 to transmit the setting information set in the display 10 having the display ID that matches the input display ID, that is, the OSD information, to the master display.

  In step A20, the CPU 21 determines whether or not setting information has been received. When setting information is received, the process proceeds to step A21. When setting information is not received, the process proceeds to step A23. In step A <b> 21, the CPU 21 stores the received setting information in the first memory 12. In step A22, the CPU 21 performs OSD display of the setting information stored in the first memory 12, and returns to step A17. The OSD display is to display setting screen information representing a setting screen superimposed on image information. That is, the CPU 21 causes the OSD circuit unit 23 to generate adjustment menu screen information based on setting information stored in the first memory 12, that is, OSD information, and sends the generated adjustment menu screen information to the OSD superimposing unit 223. Return to Step A17. The CPU 21 causes the OSD superimposing unit 223 to superimpose the adjustment menu screen information on the image information and display the information on the display device 14.

  In step A23, the CPU 21 determines whether or not a timeout has occurred. When the monitoring time, for example, 30 seconds has elapsed since the setting information acquisition command was transmitted in step A19, the process proceeds to step A24. The monitoring time is determined based on the response characteristics of each display 10 and is usually about 30 seconds to 1 minute, but is set to 30 seconds in this embodiment. When the monitoring time has not elapsed since the setting information acquisition command was transmitted in step A19, the process returns to step A20.

  In step A24, the CPU 21 generates error display information indicating that the setting information acquisition command has timed out, sends the generated error display information to the OSD superimposing unit 223, and displays the error display information on the display unit 14 to display the error display information in step A17. Return to.

  In step A30, the CPU 21 determines what the current mode is. When the current mode is mode 1, the process proceeds to step A31. When the current mode is mode 2, the process proceeds to step A37. When the current mode is mode 3, the process returns to step A14. In step A31, the CPU 21 sets the mode to “2”. That is, the CPU 21 sets the mode stored in the first memory 12 to “2” and sets the mode 2.

  In step A32, the CPU 21 executes enlargement / start point information processing, which will be described later with reference to FIG. The enlargement magnification / start point information processing determines an enlargement magnification that is a magnification for enlarging the setting screen, and a display 10 that is a starting point of the enlargement setting screen enlarged at the enlargement magnification. The starting point information, that is, the OSD display starting point ID is information indicating the display ID of the display 10 that is the starting point of the enlargement setting screen. In step A33, the CPU 21 executes a target display specifying process described later with reference to FIG. The target display specifying process is a process for specifying the display 10 necessary for enlarging and displaying the setting screen.

  In step A34, the CPU 21 reads the setting information and the target display ID from the first memory 12, and transmits the read setting information and the target display ID and the mode 2 command to the downstream display 10, that is, the slave display. The target display ID is the display ID of the display specified by the target display specifying process in step A33. At this time, the CPU 21 includes the enlargement magnification and the OSD display start point ID in the setting information and transmits it to the slave display.

  In step A35, the CPU 21 determines whether or not the target display ID includes its own display ID. When the target display ID includes the own display ID, the process proceeds to step A36, and when the target display ID does not include the own display ID, the process returns to step A17. In step A36, the CPU 21 executes an enlarged display process described later, and returns to step A17.

  In step A37, the CPU 21 sets the mode to “3”. That is, the CPU 21 sets the mode stored in the first memory 12 to “3” and sets the mode 3. In step A38, the CPU 21 deletes the display of the setting information. That is, the display of the setting screen or the enlarged setting screen displayed superimposed on the display 14 is terminated. In step A39, the CPU 21 transmits the mode 3 command to the downstream display 10, that is, the slave display, and returns to step A17.

  FIG. 22 is a flowchart showing a processing procedure of slave processing executed by the CPU 21 of the slave display. After step A6 shown in FIG. 19, the process proceeds to step A40.

  In step A40, the CPU 21 determines whether a command has been received. When a command is received, the process proceeds to step A41. When no command is received, the process returns to step A40. In step A41, the CPU 21 determines a received command, that is, what the received command is. When the received command is a distribution command, the process proceeds to step A42. When the received command is a mode 1 command, the process proceeds to step A46. When the received command is a mode 2 command, the process proceeds to step A50. Is a mode 3 command, the process proceeds to step A56, and when the received command is a setting information acquisition command, the process proceeds to step A60.

  In step A42, the CPU 21 receives the ID. That is, the display ID transmitted by the master display or the upstream slave display by the distribution command is received. In step A43, the CPU 21 sets ID = ID + 1. That is, the CPU 21 adds “1” to the received display ID. In step A44, the CPU 21 stores and sets the display ID after addition in the first memory 12 as its own display ID. In step A45, the CPU 21 transmits the distribution command and the display ID after addition to the downstream display 10, and returns to step A40.

  In step A46, the CPU 21 displays its own display ID. Specifically, the self display ID is displayed with a blue background color at the upper left of the screen, as displayed by the displays 10b to 10i which are the slave displays in FIG. In step A47, the CPU 21 transmits a mode 1 command to the downstream display 10, and returns to step A40.

  In step A50, the CPU 21 receives the ID. That is, the display ID transmitted by the master display or the upstream slave display by the mode 2 command is received. In step A51, the CPU 21 receives setting information. That is, the setting information transmitted by the master display or the upstream slave display by the mode 2 command is received. The received setting information includes the enlargement magnification and the OSD display start point ID. In step A <b> 52, the CPU 21 stores the received display ID and setting information in the first memory 12. In step A53, the CPU 21 transmits the mode 2 command and the received display ID and setting information to the downstream display 10.

  In step A54, the CPU 21 determines whether or not the received display ID includes its own display ID. When the received display ID includes the own display ID, the process proceeds to step A55, and when the received display ID does not include the own display ID, the process returns to step A40. In step A55, the CPU 21 executes an enlarged display process described later, and returns to step A40. In step A56, the CPU 21 deletes the display of the setting information. That is, the display of the setting screen or the enlarged setting screen displayed superimposed on the display 14 is terminated. In step A57, the CPU 21 transmits a mode 3 command to the downstream display 10, and returns to step A40.

  In step A60, the CPU 21 receives the ID. That is, the display ID transmitted by the master display or the upstream slave display by the setting information acquisition command is received. In step A61, the CPU 21 determines whether or not the received display ID includes its own display ID. When the received display ID includes the own display ID, the process proceeds to step A62, and when the received display ID does not include the own display ID, the process proceeds to step A64.

  In step A62, the CPU 21 displays its own display ID. Specifically, the self-display ID is displayed on the upper left of the screen as displayed on the display 10i which is the slave display in FIG. At this time, a red background color is displayed. In step A63, the CPU 21 reads the setting information of its own display from the first memory 12, transmits the read setting information to the upstream display 10, and returns to step A40.

  In step A64, the CPU 21 transmits the received display ID and setting information acquisition command to the downstream display 10. In step A65, the CPU 21 determines whether or not setting information has been received from the downstream display 10. When the setting information is received from the downstream display 10, the process proceeds to step A66, and when the setting information is not received from the downstream display 10, the process returns to step A65. In step A66, the CPU 21 transmits the received setting information to the upstream display 10, and returns to step A40.

  FIG. 22 is a flowchart showing a processing procedure of enlargement / start point information processing executed by the CPU 21. When the enlargement / start point information processing is executed in step A32 of the flowchart shown in FIG. 20, the process proceeds to step B1. In step B1, the CPU 21 sets “Dn” as the OSD display start point ID, “n” as the OSD magnification, Xmax as the number of horizontal displays, Ymax as the number of vertical displays, and Dmax as the total number of displays, and the enlargement magnification / start point. End information processing.

  The OSD display start point ID is a value set in “OSD POSITION” on the enlargement menu screen 42 and is the display ID of the display serving as the starting point of the enlargement setting screen. The starting point of the enlargement setting screen is the display ID of the display on which the upper left portion of the enlargement screen is displayed. The OSD magnification is a value set in “OSD EXPAND” on the enlargement menu screen 42 and is an enlargement magnification for enlarging the setting screen. The number of horizontal displays is the number of columns of the display 10 arranged in the horizontal direction of the multi-display device 1. The number of vertical displays is the number of stages of the display 10 arranged in the vertical direction of the multi-display device 1. The total number of displays is the number of displays 10 constituting the multi-display device 1.

  FIG. 23 is a flowchart illustrating a processing procedure of target display specifying processing executed by the CPU 21. When the target display specifying process is executed in step A33 of the flowchart shown in FIG. 20, the process proceeds to step C1.

  In step C1, the CPU 21 determines whether “Dmax ÷ n” is less than “n”. When “Dmax ÷ n” is less than “n”, the target display specifying process is terminated, and when “Dmax ÷ n” is not less than “n”, the process proceeds to Step C2. By determining whether or not “Dmax ÷ n” is less than “n”, it is determined how many times the enlarged display of the setting screen is possible. For example, in a multi-display having a 5 × 5 configuration, Dmax = 25, and enlargement of 5 times or less is possible. For example, if n = 5, it is determined as “NO”, and the process proceeds to step C2. If n = 6, it is determined as “YES”, and the target display specifying process is terminated.

  In step C2, the CPU 21 sets B = 1, that is, sets the variable B to “1”. In step C3, the CPU 21 sets A = 1, that is, sets the variable A to “1”. In step C4, the CPU 21 sets D (A, B) to “Dn + (Xmax × (A−1)) + (B−1)”. That is, the variable D (A, B) is a variable for calculating the number of displays necessary for displaying the target display, that is, the enlargement setting screen with the OSD magnification n times.

  A of D (A, B) indicates the number of stages in the number of stages, and B indicates the number of columns in the number of columns. For example, in a 5 × 5 configuration, to enlarge at an OSD magnification of 3 times, an enlargement setting screen is displayed on nine displays 10. Specifically, when the OSD display start point ID is “1”, the enlargement setting screen is divided into nine, and the position of the display is expressed by coordinates (x, y) between the number of columns x and the number of steps y. , 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3 ) Will be displayed on the nine displays 10 arranged in (). The variable D (A, B) does not exceed the total display number Dmax. Hereinafter, the coordinates (x, y) are referred to as OSD division coordinates.

  In step C5, the CPU 21 determines whether or not A = n. When the value of the variable A is equal to the OSD magnification n, it is determined that A = n, and the process proceeds to step C6. When the value of the variable A is not equal to the OSD magnification n, it is determined that A = n is not satisfied, and the process proceeds to step C8. move on. In step C6, the CPU 21 determines whether or not B = n. When the value of the variable B is equal to the OSD magnification n, it is determined that B = n, and the process proceeds to step C7. When the value of the variable B is not equal to the OSD magnification n, it is determined that B = n, and the process proceeds to step C9. move on. In step C7, the CPU 21 determines whether or not D (A, B) is equal to or less than Dmax. When D (A, B) is equal to or less than Dmax, the target display specifying process is terminated. When D (A, B) is not equal to or less than Dmax, the process proceeds to step C10.

  In Step C8, the CPU 21 sets A = A + 1, that is, adds “1” to the variable A, and returns to Step C4. In step C9, the CPU 21 sets B = B + 1, that is, adds “1” to the variable B, and returns to step C3. In step C10, the CPU 21 displays screen over error information indicating a screen over error on the display unit 14, and ends the target display specifying process.

  FIG. 24 is a flowchart showing the procedure of the enlarged display process executed by the CPU 21. When the enlarged display process is executed in step A36 of the flowchart shown in FIG. 20 or step A55 of the flowchart shown in FIG. 21, the process proceeds to step D1.

  In step D1, the CPU 21 causes the OSD generation unit 231 to generate OSD data to be displayed from the OSD division coordinates. The OSD division coordinates are the coordinates (x, y) described above. That is, the CPU 21 causes the OSD generation unit 231 to generate OSD data to be displayed based on the coordinates (x, y) described above. The OSD data is setting screen information of a setting screen.

  In step D2, the CPU 21 causes the OSD enlargement processing unit 232 to enlarge the OSD data based on the OSD magnification n. The OSD magnification n is an enlargement magnification. In step D3, the CPU 21 sends the enlarged OSD data to the OSD superimposing unit 223, superimposes the OSD data on the image information, and ends the enlarged display process.

  In the above-described embodiment, the display 10a is a master display. However, the display 10a is not necessarily a master display. Any one of the displays 10b to 10i is a master display, and the other display 10 is a slave display. It is also possible.

  In the above-described embodiment, the multi-display device 1 is realized with a 3 × 3 configuration. However, the present invention is not limited to this configuration, and an m × n configuration (m and n are m> 3 and n> 3). (Integer integer) may be used. The larger the number of m and n is, the more it is necessary to move away from the multi-display device 1 in order to look over the whole, and the effect of being able to enlarge the setting screen can be exhibited.

  As described above, each of the plurality of displays 10 includes a display 14 for displaying image information representing an image or setting screen information representing a setting screen for setting the own device, and is preliminarily defined adjacently. Arranged in the connection configuration and connection order. The plurality of displays 10 can enlarge and display image information to be displayed on one display 14 on the displays 14 of the plurality of displays 10. Each display 10 includes a first resistance element R1, a diode D, an RS-232C input connection unit 18 and an RS-232C output connection unit 19, a CPU 21, an RS-232C output connection unit 19, and an RS-232C input connection unit 18. And further including. The first resistance element R1, the diode D, the RS-232C input connection unit 18 and the RS-232C output connection unit 19 use one of the plurality of displays 10 as a master display, and the remaining display 10 excluding the master display as a slave display. Set to. CPU21 specifies the display 10 required in order to display the expansion setting screen which expanded the magnitude | size of the setting screen which the setting screen information of a predetermined display apparatus shows to the predetermined magnification. The RS-232C output connection unit 19 is a display specified by the CPU 21 on the display 10 set as the slave display by the first resistance element R1, the diode D, the RS-232C input connection unit 18 and the RS-232C output connection unit 19. Display ID for identifying 10, enlargement magnification information indicating a predetermined magnification, and setting screen information are transmitted. The RS-232C input connection unit 18 receives the display ID, the magnification information, and the setting screen information transmitted by the RS-232C output connection unit 19 of another display. Then, when the display ID received by the RS-232C input connection unit 18 matches the display ID of the own display 10, the CPU 21 among the setting screens indicated by the setting screen information received by the RS-232C input connection unit 18, The part to be displayed on the display 10 is specified, the part of the specified setting screen is enlarged to the magnification indicated by the enlargement magnification information received by the RS-232C input connection unit 18, and the enlarged part representing the part of the setting screen is enlarged. The setting screen partial information is displayed on the display 14. Therefore, the setting screen displayed on the multi-configuration display 10 can be enlarged so that it can be read from a remote position.

  Further, the remote controller 30 operates the display 10. In the second resistance element R2 and the OR circuit 25, each display 10 validates the operation performed by the remote controller 30 only for the master display. The CPU 21 displays the preset display device setting screen information on the display 14 of the master display. The predetermined magnification is a magnification set by the remote controller 30 in response to the setting screen indicated by the setting screen information displayed on the display 14 of the master display by the CPU 21. Therefore, even if the display device is composed of a plurality of displays 10, an enlargement magnification can be designated by the remote controller 30 for one display 10.

  Further, the setting screen indicated by the setting screen information includes a display ID item for selecting one display 10 from the plurality of displays 10. The predetermined display device is the display 10 set by the remote controller 30 in response to the item of display ID of the setting screen indicated by the setting screen information displayed on the indicator 14 of the master display by the CPU 21. Therefore, even if the display device includes a plurality of displays 10, one display 10 can be selected as the display 10 to be adjusted by the remote controller 30.

  Further, the display 14 includes a liquid crystal panel 101 and a frame portion 102 provided on the periphery of the liquid crystal panel 101. The frame correction unit 221 performs frame correction so that only the image information of the image information and the setting screen information is displayed on the frame unit 102. Therefore, it is possible to prevent the image information from being extended and to prevent loss of character information such as setting items and setting information displayed on the setting screen.

DESCRIPTION OF SYMBOLS 1 Multi display apparatus 10 Display 11 Scaler part 12 1st memory 13 2nd memory 14 Display 15 Light-receiving part 16 Image signal input part 17 LAN connection part 18 RS-232C input connection part 19 RS-232C output connection part 21 CPU
DESCRIPTION OF SYMBOLS 22 Display control circuit part 23 OSD circuit part 101 Liquid crystal panel 102 Frame part 221 Frame correction part 222 Enlargement process part 223 OSD superimposition part 231 OSD production | generation part 232 OSD enlargement process part D Diode K1-K8 Connection cable R1 1st resistance element R2 1st 2 resistance elements

Claims (4)

A plurality of display devices each having display means for displaying image information representing an image or setting screen information representing a setting screen for performing setting of the own device and arranged adjacent to each other at predetermined arrangement positions; A plurality of display devices capable of enlarging image information to be displayed on one display means and displaying them on the display means of the plurality of display devices,
Each display device
Master-slave setting means for setting one of the plurality of display devices as a master display device and setting the remaining display devices other than the master display device as slave display devices;
Specifying means for specifying a display device necessary for displaying an enlarged setting screen in which the size of the setting screen indicated by the setting screen information of the predetermined display device is enlarged to a predetermined magnification;
Transmitting means for transmitting identification information for identifying the display device specified by the specifying means, enlargement magnification information indicating a predetermined magnification, and setting screen information to the display device set as the slave display device by the master-slave setting means; ,
Receiving means for receiving identification information, magnification information and setting screen information transmitted by the transmitting means of the other display device;
When the identification information received by the receiving unit matches the identification information of the own display device, the portion of the setting screen indicated by the setting screen information received by the receiving unit is specified to be displayed on the own display device, and the specified setting And display control means for enlarging the screen portion to the magnification indicated by the enlargement magnification information received by the receiving means, and causing the display means to display enlarged setting screen partial information representing the enlarged setting screen portion. Display device. An operating device for operating the display device;
Each display device further includes an effective means for enabling the operation performed on the operation device only to the main display device,
The display control means causes the display means of the main display device to display setting screen information of the predetermined display device,
The predetermined magnification is a magnification set by an operating device in response to a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means. The display device described in 1. The setting screen indicated by the setting screen information includes a selection item for selecting one display device from the plurality of display devices,
The predetermined display device is a display device set by an operation device in response to a selection item of a setting screen indicated by setting screen information displayed on the display means of the main display device by the display control means. The display device according to claim 2. The display means includes a liquid crystal panel and a frame portion provided on the periphery of the liquid crystal panel,
The frame correction means for performing frame correction so that only the image information is displayed on the frame portion of the image information and the setting screen information is included. Display device.

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