JP2020030318A - Video display device and video display system - Google Patents

Abstract

To provide a video display device that makes a non-display area inconspicuous without providing an additional mechanism, the video display device displaying video on a screen constituted by combining a plurality of display modules.SOLUTION: Each display device comprises: a virtual pixel setting unit that sets virtual pixels 701 which are composed of a plurality of pixels being adjacent to each other and arrayed on a pixel area; and a display control unit that displays one pixel portion of a video area corresponding to a position of a display module on a display surface at one virtual pixel 701. The virtual pixel 701 includes at least one display pixel being a pixel contributing to display of a video, and a plurality of non-display pixels which are pixels not contributing to the display of the video and which are arrayed in at least any direction of a horizontal direction and a vertical direction. Width of the non-display area is an integral multiple of a pixel pitch.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a video display device and a video display system that form a single large screen by combining a plurality of display modules such as a rear projection display using a liquid crystal display or a digital micromirror device (DMD). is there.

  The display module includes a pixel region in which pixels are arranged, and a non-pixel region in which pixels formed around the pixel region are not arranged. Therefore, when an image is displayed on a screen configured by combining a plurality of display modules, the non-pixel region is a non-display region where the image is not displayed. Due to the non-display area, there is a problem that the quality of the image is reduced.

  Patent Literature 1 discloses a technique for making a non-display area inconspicuous by a mechanical component having a reflective surface.

JP 2012-108270 A

  Even with the technique of Patent Literature 1, the non-display area cannot be completely invisible, and the joint looks unnatural depending on the viewing direction. In addition, since it is necessary to additionally install mechanical parts, there is a problem that costs and man-hours increase. The present invention has been made in order to solve the above-described problems, and in a video display device that displays video on a screen configured by combining a plurality of display modules, non-display without providing an additional mechanism. The purpose is to make the area inconspicuous.

  The video display device of the present invention is a video display device that includes a plurality of display devices and displays video on a single display surface configured by arranging display modules included in each display device, wherein each display module is Has a pixel region in which a plurality of pixels are arranged, and a non-pixel region surrounding the pixel region and in which no pixels are arranged, and each display device sets a virtual pixel composed of a plurality of adjacent pixels and arranged in the pixel region. A virtual pixel setting unit, and a display control unit that displays, for one virtual pixel, one pixel of an image area corresponding to the position of the display module on the display surface, and the virtual pixel contributes to display of the image. And at least one non-display pixel, which is a pixel that does not contribute to the display of an image and is arranged in at least one of the horizontal direction and the vertical direction. Between Le of the pixel region, is non-display area formed of the installation gap and a non-pixel region of the display module adjacent formation, the width of the non-display area is an integer multiple of the pitch of pixels.

  According to the present invention, the width of the array pattern of non-display pixels can be adjusted to the width of the non-display area. Therefore, it is possible to camouflage the non-display area by the arrangement pattern of the non-display pixels, and to make the non-display area inconspicuous.

FIG. 2 is a diagram illustrating a configuration of a video display device according to the first embodiment. FIG. 2 is a block diagram illustrating a circuit configuration of the display device according to the first embodiment. FIG. 1 is a schematic diagram illustrating a configuration of a video display system according to a first embodiment. It is a schematic diagram of an LCD panel. It is the figure which expanded the butted part of four LCD panels. 4 is a flowchart illustrating an operation of the microcontroller in the video display device according to the first embodiment. FIG. 3 is a diagram illustrating an input image and an enlarged display on an LCD panel. FIG. 9 is a diagram illustrating an array of virtual pixels when the horizontal enlargement ratio and the vertical enlargement ratio are 4. It is an enlarged view of a virtual pixel. It is a figure showing the display picture of a multi-screen. FIG. 8 is a diagram illustrating an array of virtual pixels when the horizontal enlargement ratio and the vertical enlargement ratio are 6. It is an enlarged view of a virtual pixel. It is a figure showing the display picture of a multi-screen. FIG. 4 is a diagram illustrating a relationship between each parameter and luminance efficiency in the video display device. FIG. 7 is a diagram illustrating a grid pattern and a non-pixel region after grid brightness adjustment. FIG. 9 is a schematic diagram illustrating a configuration of a video display system according to a second embodiment. FIG. 13 is a diagram illustrating a display example of the video display device according to the second embodiment. 9 is a flowchart illustrating an operation of the microcontroller in the video display device according to the second embodiment. 5 is a flowchart illustrating an operation of the control device. It is a figure showing a menu screen of a user interface.

<A. First Embodiment>
<A-1. Configuration>
FIG. 1 shows a configuration of a video display device 1000 according to the first embodiment. The video display device 1000 is a display device group including a plurality of display devices 100 to 115. Each of the display devices 100 to 115 includes a liquid crystal (LCD) panel as a single display module. In this specification, an LCD panel is described as an example of a display module, but the display devices 100 to 115 may include another display module. Each of the display devices 100 to 115 has, for example, an input terminal and an output terminal of an RS232C cable, and is daisy-chain connected by a signal cable 10 which is an RS232C cable as shown in FIG. The display device 100 is a master device for communication and control functions, and the display devices 101 to 115 are slave devices for communication and control functions. As shown in FIG. 1, each display device 100-115 is assigned an individual identification number (ID). For example, the ID of the display device 100 is 1. Note that the number of display devices shown in FIG. 1 is an example. The video display device 1000 only needs to be configured with one display device operating as a master device and at least one display device operating as a slave device.

  FIG. 2 is a block diagram illustrating a circuit configuration of the display device 100. Since the circuit configuration of the display devices 101 to 115 is equivalent to that of the display device 100, only the circuit configuration of the display device 100 will be described below. The display device 100 includes an input terminal 1, an output terminal 2, a scaler IC 3, a microcontroller 4, an LCD panel 5, a non-volatile memory 6, and an infrared remote control light receiving unit 7.

  The input terminal 1 is an input terminal for a control signal. The control signal input to the input terminal 1 is output to the microcontroller 4. The output terminal 2 is an output terminal for a control signal. The control signal output from the microcontroller 4 is output to the outside of the display device 100 via the output terminal 2. The scaler IC 3 receives the input of the video signal, processes the video signal, drives the LCD panel 5 to display a video, and adjusts the brightness of the backlight. In this specification, the term "video" includes a moving image and a still image. The microcontroller 4 is connected to the communication control terminal of the scaler IC 3 and controls the scaler IC 3. An input terminal of the microcontroller 4 is connected to an infrared remote control light receiving section 7. The microcontroller 4 receives an OSD (On Screen Display) operation command from an infrared remote controller (not shown) external to the display device 100 via the infrared remote controller light receiving unit 7. The nonvolatile memory 6 is connected to the microcontroller 4. The nonvolatile memory 6 stores each parameter according to the result of the OSD operation.

  FIG. 3 is a schematic diagram illustrating a configuration of the video display system according to the first embodiment. The video display system according to the first embodiment includes a signal source A301, a signal distributor 401, and a video display device 1000. A signal source A301 is connected to a video input terminal of the signal distributor 401 via a video signal cable 311. A video output terminal of the signal distributor 401 is connected to a video input terminal of each of the display devices 100 to 115 via a video signal cable group 321. The signal distributor 401 distributes the video signal from the signal source A to each of the display devices 100 to 115.

  FIG. 4 is a schematic diagram of the LCD panel 5. The LCD panel 5 includes a pixel area 5A where pixels are arranged, and a non-pixel area 5B where no pixels are arranged. The non-pixel region 5B surrounds the rectangular pixel region 5A. The non-pixel region 5B includes an upper side portion in contact with the upper side of the pixel region 5A, a lower side portion in contact with the lower side of the pixel region 5A, a right side portion in contact with the right side of the pixel region 5A, and a left side portion in contact with the left side of the pixel region 5A. Have. The LCD panels 5 of the respective display devices 100 to 115 are arranged in a 4 × 4 configuration to form a single display surface (hereinafter, also referred to as “multi-screen”).

  FIG. 5 is an enlarged view of the butted portion of the four LCD panels 5. Pixel 201 is arranged in pixel area 5A. The pixel 201 includes a red sub-pixel 201r, a green sub-pixel 201g, and a blue sub-pixel 201b. In this specification, the left-right direction and the up-down direction in the LCD panel 5 or the multi-screen are referred to as a horizontal direction and a vertical direction, respectively. The horizontal pixel pitch, which is the horizontal pitch of the pixel 201, is px, and the vertical pixel pitch, which is the vertical pitch of the pixel 201, is py. The width of the upper side of the non-pixel region 5B is buy, the width of the lower side is bdy, the width of the right side is brx, and the width of the left side is blx. Currently, liquid crystal panels with brx = blx = buy = bdy = 0.6 mm and px = py = 0.63 mm are commercially available. The width of the horizontal installation gap of the LCD panel 5 is sx, and the width of the vertical installation gap of the LCD panel 5 is sy.

  In the multi-screen, a non-display area where no image is displayed occurs between the pixel areas 5A of the two LCD panels 5. The non-display area includes a non-pixel area 5 </ b> B and an installation gap between the LCD panel 5. The non-display area is also called a joint. The joint width Gx in the horizontal direction is obtained by the following equation (1).

  Further, the joint width Gy in the vertical direction is obtained by the following equation (2).

  In consideration of camouflaging the non-display area with the grid pattern of non-display pixels described later, it is desirable that the joint width be an integral multiple of the pixel pitch. That is, when the LCD panels 5 are arranged, the widths sx and sy of the installation gap of the LCD panel 5 are adjusted so that the joint widths Gx and Gy satisfy the following equations (3) and (4). Note that nx and ny are integers, and are set to 2 in the following description.

<A-2. Operation>
FIG. 6 is a flowchart showing the operation of the microcontroller 4. Hereinafter, the operation of the microcontroller 4 will be described along the flow of FIG. When the video display device 1000 starts, the microcontroller 4 performs an initialization process (step S11). In this step, the microcontroller 4 performs the initial setting of the peripheral ICs such as the memory in the microcontroller 4, the input terminal 1, the output terminal 2, and the scaler 3.

  Next, the microcontroller 4 controls communication between the display devices or with a control device external to the display device, and performs a command process related to the communication (step S12). Then, the microcontroller 4 performs a command process related to the OSD and the remote control operation (step S13). Thereafter, the microcontroller 4 performs an image enlargement display process (step S14). In this step, the microcontroller 4 controls the scaler IC3. The scaler IC 3 enlarges and displays the input image on the LCD panel 5 under the control of the microcontroller 4. Next, the microcontroller 4 performs a lattice brightness control process (step S15). In this step, the microcontroller 4 controls the scaler IC 3 and causes the scaler IC 3 to adjust the grid luminance. The grid luminance will be described later. Further, the microcontroller 4 performs a brightness control process (Step S16). In this step, the microcontroller 4 controls the scaler IC3. Under the control of the microcontroller 4, the scaler IC 3 adjusts the backlight of the LCD panel 5 to perform brightness control. Steps S12 to S16 constitute a main loop and are repeatedly executed.

  FIG. 7A illustrates an input image from the signal distributor 401 to each of the display devices 100 to 115 of the image display device 1000. This input video is called an original video. The video display device 1000 enlarges the original video and displays it on the multi-screen (step S14 in FIG. 6). Specifically, the microcontroller 4 grasps the installation position of the LCD panel 5 on the multi-screen from the ID of the display device, and specifies the image area 702 of the original image corresponding to the installation position. Then, the scaler IC 3 enlarges and displays the image area 702 on the LCD panel 5 at an enlargement rate set by OSD or communication processing. FIG. 7B shows an image area 702 enlarged and displayed on the LCD panel 5.

  The scaler IC 3 sets a virtual pixel 701 on the LCD panel 5 when performing the enlarged display. The virtual pixel 701 is composed of a plurality of adjacent pixels 201 and displays one pixel of the original video. The number of the pixels 201 constituting the virtual pixel 701 is determined by the horizontal enlargement ratio mx and the vertical enlargement ratio my of the LCD panel 5. The horizontal enlargement ratio mx and the vertical enlargement ratio my are enlargement ratios of images on the LCD panel 5 in the horizontal and vertical directions. The horizontal enlargement ratio mx and the vertical enlargement ratio my are determined in the microcontroller 4 in response to the communication in step S12 in FIG. 6 or the operation of the OSD in step S13.

  FIG. 8 shows an arrangement of the virtual pixels 701 when the horizontal enlargement ratio mx and the vertical enlargement ratio my are four. FIG. 9 is an enlarged view of one virtual pixel 701 in FIG. 8 and 9, the virtual pixel 701 is composed of 16 pixels 201 arranged in a 4 × 4 arrangement. The pixel pitch of the virtual pixel 701 is four times the pixel pitch px and py of the pixel 201 in each of the horizontal direction and the vertical direction.

  Of the pixels 201 constituting the virtual pixel 701, the pixel 201 that contributes to the display of an image is called a display pixel, and the pixel 201 that does not contribute to the display of an image is called a non-display pixel. The non-display pixels are arranged in the horizontal direction and the vertical direction over the entire pixel region 5A, and constitute a grid pattern 703 that camouflages the non-display region of the multi-screen. The width of the grid pattern 703 is defined by the number of pixels 201 equal to nx and ny in the above equations (3) and (4). 8 and 9, the width of the grid pattern 703 is defined by two pixels 201. Thereby, the width of the grid pattern 703 becomes equal to the joint width. Here, the case where the non-display pixels are arranged in the horizontal direction and the vertical direction to form the grid pattern 703 is described, but the non-display pixels may be arranged in only one of the horizontal direction and the vertical direction. . Thereby, an effect of camouflaging the non-display area formed in either the horizontal direction or the vertical direction can be obtained.

  In the examples of FIGS. 8 and 9, among the pixels 201 constituting the virtual pixel 701, four pixels 201 at the upper right corner are display pixels that contribute to display of an image, and the other 12 pixels 201 are grid pixels. These are non-display pixels that form the pattern 703. In the virtual pixel 701, the numbers of connections qx and qy of the display pixels in the horizontal direction and the vertical direction are each two. Information for one pixel of the original image is displayed on four display pixels of the virtual pixel 701. Further, the interval between the non-pixel region 5B and the lattice pattern 703 is equal to the lattice interval of the lattice pattern 703. Therefore, the grid pattern 703 and the non-display area are integrally formed to form a uniform grid pattern, and the non-display area is camouflaged.

  FIG. 10 shows a multi-screen display image on the LCD panel 5 of FIGS. 8 and 9. The multi-screen is composed of 16 4 × 4 LCD panels 5. In the multi-screen, there is a non-display area where no image is displayed due to the installation gap between the non-pixel area 5B of the LCD panel 5 and the adjacent LCD panel 5. However, since the grid pattern 703 and the non-display area are integrated to form a uniform grid pattern, the non-display area is inconspicuous. Assuming that the number of pixels of the LCD panel 5 is 1920 × 1080, the number of virtual horizontal pixels dot_h on a unit surface, that is, one LCD panel 5 is 480, and the number of virtual vertical pixels dot_v on a unit surface is 270. The number of virtual horizontal pixels dot_h on the unit surface is the number of virtual pixels 701 in the horizontal direction of one LCD panel 5, and the number of virtual vertical pixels dot_v on the unit surface is the number of virtual pixels 701 in the vertical direction of one LCD panel 5. Is a number. Since the grid pattern 703 does not contribute to the display of an image, the light emission area of the multi-screen is 25% of the original. Therefore, the light emission luminance efficiency of the multi-screen is 25% as compared with the case where the lattice pattern 703 does not exist.

  FIG. 11 shows an array of virtual pixels 701 when the horizontal enlargement ratio mx and the vertical enlargement ratio my are 6. FIG. 12 is an enlarged view of one virtual pixel 701 in FIG. 11 and 12, the virtual pixel 701 is composed of 36 pixels 201 arranged in 6 × 6. The pixel pitch of the virtual pixel 701 is six times the pixel pitch px and py of the pixel 201 in each of the horizontal direction and the vertical direction.

  In the virtual pixel 701 in FIGS. 11 and 12, 16 × 4 × 4 pixels 201 at the upper right corner are display pixels contributing to display of an image, and the other 20 pixels 201 constitute a grid pattern 703. It is a display pixel. The width of the grid pattern 703 is defined by two pixels 201. In the virtual pixel 701, the number of connections qx in the horizontal direction and the number of connections qy in the vertical direction of the display pixels are 4 respectively. Information for one pixel of the original image is displayed on 16 display pixels of the virtual pixel 701. Further, the interval between the non-pixel region 5B and the lattice pattern 703 is equal to the lattice interval of the lattice pattern 703. Therefore, the grid pattern 703 and the non-display area are integrated to form a uniform grid pattern, and the non-display area is camouflaged.

  FIG. 13 shows a multi-screen display image on the LCD panel 5 of FIGS. 11 and 12. The multi-screen is composed of 36 6 × 6 LCD panels 5. In FIG. 13, as in FIG. 10, since the grid pattern 703 and the non-display area are integrated to form a uniform grid pattern, the non-display area is inconspicuous. Assuming that the number of pixels of the LCD panel 5 is 1920 × 1080, the number of virtual horizontal pixels dot_h on the unit surface is 320, and the number of virtual vertical pixels dot_v on the unit surface is 180. Since the grid pattern 703 does not contribute to the display of an image, the light emission area of the multi-screen is 44.4% of the original. Therefore, the light emission luminance efficiency of the multi-screen is 44.4% when the lattice pattern 703 does not exist.

  FIG. 14 shows the relationship between each parameter and the luminance efficiency in the video display device 1000. The number of pixels of the LCD panel 5 is 1920 × 1080. The parameters of the video display device 1000 include a horizontal enlargement ratio mx, a vertical enlargement ratio my, the number of connected pixels qx in the horizontal direction, the number of connected pixels qy in the vertical direction, the horizontal pixel pitch px [mm], and the vertical pixel pitch py. [Mm], width brx [mm] of the right side of the non-pixel region 5B, width blx [mm] of the left side of the non-pixel region 5B, nx, width sx [mm] of the horizontal installation gap of the LCD panel 5, The width of the upper side of the non-pixel region 5B buy [mm], the width of the lower side of the non-pixel region 5B bdy [mm], the vertical grid width ny, the installation gap width sy [mm] of the LCD panel 5 in the vertical direction, the unit surface , And the virtual vertical pixel number dot_v of the unit surface. The luminance adjustment value α [PWM,%] shown in FIG. 14 is the duty (0-100%) of the PWM control of the backlight, and is set to the value shown in FIG. 14 in step S16 of FIG. That is, the scaler IC 3 functions as a display luminance correction unit that corrects the luminance of the display pixel according to the horizontal magnification mx and the vertical magnification my. The relative luminance shown in FIG. 14 is a relative luminance value where the luminance value when the horizontal enlargement ratio mx and the vertical enlargement ratio my are each 3 is 100. By setting the brightness adjustment value α to the value shown in FIG. 14, a constant brightness value is always obtained in each of the cases where the horizontal enlargement ratio mx and the vertical enlargement ratio my are changed.

  In step S15 of FIG. 6, the scaler IC3 adjusts the grid luminance. The lattice luminance is the luminance of the lattice pattern 703, that is, the luminance of the non-display pixels. The scaler IC3 controls the grid luminance to be close to the reflection luminance of the non-pixel region 5B. As described above, the scaler IC 3 functions as a non-display luminance correction unit that corrects the luminance of non-display pixels. The value of the grid luminance is set by the user by visual adjustment or the like in step S13 in FIG. Before the adjustment of the grid luminance, the grid luminance differs from the reflection luminance of the non-pixel area 5B, so that the grid pattern 703 and the non-pixel area 5B look different as shown in FIG. However, after the adjustment of the grid luminance, the difference between the grid pattern 703 and the non-pixel area 5B becomes inconspicuous, as shown in FIG.

<A-3. Effect>
The image display device 1000 according to the first embodiment includes a plurality of display devices 100 to 115, and displays an image on a single display surface configured by arranging display modules included in each of the display devices 100 to 115. Each display module has a pixel region 5A in which a plurality of pixels 201 are arranged, and a non-pixel region 5B surrounding the pixel region 5A and in which the pixels 201 are not arranged. Each of the display devices 100 to 115 includes a microcontroller 4 that functions as a virtual pixel setting unit and a display control unit. The virtual pixel setting unit sets a virtual pixel 701 composed of a plurality of adjacent pixels 201 and arranged in the pixel area 5A. The display control unit displays, on one virtual pixel 701, one pixel of the image area corresponding to the position of the display module on the display surface. Thereby, the image is enlarged and displayed.

  The virtual pixel 701 includes at least one display pixel that contributes to display of an image and a plurality of non-display pixels 201 that do not contribute to display of an image and are arranged in at least one of the horizontal direction and the vertical direction. Pixels. Between the pixel regions 5A of the adjacent display modules, a non-display region including the installation gap of the adjacent display modules and the non-pixel region 5B is formed. The widths Gx and Gy of the non-display area are integer multiples of the pitches px and py of the pixels 201. Thus, the width of the pattern of the non-pixel region 5B becomes the same as the width of the non-display region, so that the non-display region can be made inconspicuous without lowering the resolution of the image.

  Further, the microcontroller 4 functions as a display brightness correction unit. The display luminance correction unit corrects the luminance of the display pixel according to the area ratio between the display pixel and the non-display pixel in the virtual pixel 701. Therefore, a change in the display luminance of the multi-screen due to a change in the magnification of the image is reduced.

  Further, the microcontroller 4 functions as a non-display luminance correction unit. The non-display luminance correction unit corrects the luminance of the non-display pixels according to the reflection luminance of the non-pixel area 5B. Therefore, the pattern of the non-display pixels and the non-pixel region 5B look the same, and the non-pixel region 5B becomes inconspicuous.

<B. Second Embodiment>
In the first embodiment, a video signal from one signal source is input to the video display device 1000, and the video is enlarged and displayed in the entire area of the multi-screen. On the other hand, in the second embodiment, video signals from a plurality of signal sources are input to the video display device 1000. The multi-screen is divided into a main screen area and a sub-screen area for each LCD panel 5. The LCD panel 5, which forms the main screen area, enlarges and displays an image as in the first embodiment. On the other hand, the LCD panel 5 constituting the sub-screen area displays the input video without enlargement. Thus, images from different signal sources are displayed between the LCD panel 5 forming the main screen area and the LCD panel 5 forming the sub-screen area, and further between the LCD panels forming the sub-screen area. It is possible.

<B-1. Configuration>
FIG. 16 is a schematic diagram illustrating a configuration of the video display system according to the second embodiment. The video display system according to the second embodiment includes eight signal sources A301 to H308, a matrix switcher 501, a control device 502, and a video display device 1000. A plurality of video input terminals of the matrix switcher 501 are connected to signal sources A301-H308 via video signal cables 311-318. The matrix switcher 501 operates as a video signal selection device that selects a video signal from the video signals of the plurality of signal sources A301-H308 and outputs the video signal to each of the display devices 100-115. A video output terminal of the matrix switcher 501 is connected to a video input terminal of each of the display devices 100 to 115 included in the video display device 1000 via a video signal cable group 321.

  The control device 502 includes communication control output terminals A and B. The communication control output terminal A is connected to the communication control input terminal of the matrix switcher 501 via the cable 331. The communication control output terminal B is connected to the input terminal 1 of each of the display devices 100 to 115 configuring the video display device 1000 via the cable 332.

<B-2. Operation>
FIG. 17 illustrates a display example of the video display device 1000 according to the second embodiment. The multi-screen of the video display device 1000 is configured such that the LCD panels 5 of the display devices 100 to 115 are arranged in 4 × 4.

  The video signal from the signal source A301 is supplied to the display device (ID = 6-8, 10-12, 14-16) via the matrix switcher 501. The video signals of the other signal sources B302-H308 are supplied to the display devices (ID = 1-5, 9, 13) via the matrix switcher 501, respectively.

  The control device 502 instructs whether or not to perform enlarged display on each display device by the communication control means. Here, the control device 502 sets an enlarged display in which the horizontal enlargement ratio mx and the vertical enlargement ratio my are 3 for the display devices with ID = 6-8, 10-12, and 14-16, and ID = 1-5. , 9, 13 are set to non-enlarged display. A display device for which enlarged display is set is also referred to as an enlarged display device.

  FIG. 18 is a flowchart showing the operation of the microcontroller 4 according to the second embodiment. The flow in FIG. 18 is obtained by adding step S13A between steps S13 and S14 of the flow in FIG. In step S13A, the microcontroller 4 determines whether or not there is an enlarged display. If the microcontroller 4 determines in step S13A that there is an enlarged display, the process proceeds to step S14. If the microcontroller 4 determines that there is no enlarged display, the process skips steps S14 and S15 and proceeds to step S16.

  FIG. 19 is a flowchart showing the operation of the control device 502. The control device 502 includes a storage device for storing various information (not shown in FIG. 16). When the video display system starts, the control device 502 reads the setting values stored in the storage device (Step S21). Then, the control device 502 performs an initial setting of the matrix switcher 501 and the display devices 100 to 115 using the setting values read in step S21 (step S22).

  Next, the control device 502 receives a setting change by the user (step S23). Next, the control device 502 determines whether there is a setting change in step S23 (step S24). When there is a setting change, the control device 502 changes the setting of the matrix switcher 501 (step S25), and changes the setting of the display devices 100 to 115 (step S26).

  After step S26 or when there is no setting change in step S24, the control device 502 determines whether or not a termination operation has been performed by the user (step S27). If there is no end operation in step S27, the operation of the control device 502 returns to step S23. If there is an end operation in step S27, the control device 502 stores the set values of the matrix switcher 501 and the display devices 100 to 115 in the storage device (step S28), and ends the processing.

  FIG. 20 shows a menu screen 600 of the user interface used for changing the user settings in step S23 of FIG. The menu screen 600 displays a chart 601, a main screen area designation menu 602, 603, an ID list 604, an enter button 605, a reset button 606, a cancel button 607, and an end button 608.

  The chart 601 displays the ID of each of the display devices 100 to 115 in a rectangular frame along the arrangement of the LCD panel 5 forming the multi-screen. Thereby, the arrangement of the display devices 100 to 115 on the multi-screen is shown. The color difference on the chart 601 indicates whether the display output of each of the display devices 100 to 115 has been selected.

  The designated menu 602 is a designated menu for the main screen area. The designated items in the designated menu 602 are TOP LEFT ID, HORIZONTAL COUNT, VERTICAL COUNT, and SOURCE. The TOP LEFT ID represents the ID of the display device forming the upper left corner of the main screen area. HORIZONTAL COUNT and VERTICAL COUNT represent the numbers of the display devices constituting the main screen area in the horizontal and vertical directions, respectively. SOURCE represents a signal source of an image displayed in the main screen area.

  The designation menu 603 is a menu for designating a display device constituting the sub-screen area in combination with a signal source of an image displayed in the sub-screen area. The user specifies the display device ID for each signal source displayed in the specification menu 603.

  The ID list 604 is a list of display device IDs. The IDs of the display devices specified by the specified menus 602 and 603 are distinguished from the others by a method such as being grayed out or shaded in the ID list 604.

  The enter button 605 is an enter button for setting change contents. When the enter button 605 is operated, the settings are confirmed. A reset button 606 is a reset button for setting change contents. When the reset button 606 is operated, the setting content is reset to a predetermined value. When the cancel button 607 is operated, the setting content returns to the previous saved value. When the end button 608 is operated, the current setting values are saved (step S28 in FIG. 19), and the process ends.

<B-3. Effect>
The video display system according to the second embodiment outputs a plurality of display devices 100 to 115 having display modules and a video signal selected from the video signals of the plurality of signal sources 301 to 308 to each of the plurality of display devices 100 to 115. The system includes a matrix switcher 501 as a video signal selection device, and a control device 502 for designating a plurality of display devices as a magnified display device for performing magnified display of a video. The display modules are arranged to form a single display surface. Each display module has a pixel region 5A in which a plurality of pixels 201 are arranged, and a non-pixel region 5B surrounding the pixel region 5A and in which the pixels 201 are not arranged. Each of the display devices 100 to 115 includes a virtual pixel setting unit and a microcontroller 4 that functions as a display control unit. The virtual pixel setting unit sets a virtual pixel 701 composed of a plurality of adjacent pixels 201 and arranged in the pixel area 5A, when the virtual pixel 701 is designated as the enlarged display device. The display control unit controls display of an image in the pixel region 5A. The virtual pixel 701 includes at least one display pixel that contributes to display of an image and a plurality of non-display pixels 201 that do not contribute to display of an image and that extends in at least one of the horizontal direction and the vertical direction. Pixels. The width Gx, Gy of the non-display area formed between the pixel areas 5A of the adjacent display modules and the installation gap of the adjacent display modules and the non-pixel area 5B is an integral multiple of the pitch px, py of the pixel 201. . The display control unit displays one pixel of an image corresponding to the position of the display module on the display surface in one virtual pixel 701 in the enlarged display device, and displays one pixel in other display devices. One pixel of an image is displayed on the pixel 201. Therefore, according to the image display system of the second embodiment, it is possible to display images of a plurality of signal sources on a multi-screen and to enlarge and display the images on some display devices. Then, as in the first embodiment, the non-display area can be made inconspicuous without lowering the resolution of the image, as in the first embodiment.

  In the present invention, each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted within the scope of the invention.

  1 input terminal, 2 output terminal, 3 scaler IC, 4 microcontroller, 5 LCD panel, 5A pixel area, 5B non-pixel area, 6 nonvolatile memory, 7 infrared remote control light receiving section, 10 signal cable, 100-115 display device, 201 pixel, 201b, 201g, 201r sub-pixel, 301 signal source, 311 video signal cable, 321 video signal cable group, 331, 332 cable, 401 signal distributor, 501 matrix switcher, 502 control device, 600 menu screen, 601 chart 602, 603 designation menu, 604 ID list, 605 decision button, 606 reset button, 607 cancel button, 608 end button, 701 virtual pixel, 702 image area, 703 grid pattern.

Claims (4)

A video display device that includes a plurality of display devices and displays a video on a single display surface configured by arranging display modules included in each of the display devices,
Each of the display modules includes a pixel region in which a plurality of pixels are arranged, and a non-pixel region surrounding the pixel region and in which the pixels are not arranged,
Each said display device,
A virtual pixel setting unit that sets a virtual pixel composed of a plurality of adjacent pixels and arranged in the pixel region;
A display control unit that displays, for one virtual pixel, one pixel of the image area according to the position of the display module on the display surface;
The virtual pixel is at least one display pixel that is the pixel that contributes to the display of the image, and a plurality of pixels that are the pixels that do not contribute to the display of the image and are arranged in at least one of the horizontal direction and the vertical direction. Including non-display pixels,
A non-display area including the installation gap of the adjacent display module and the non-pixel area is formed between the pixel areas of the adjacent display modules,
The width of the non-display area is an integral multiple of the pixel pitch,
Video display device. Each of the display devices includes a display brightness correction unit that corrects the brightness of the display pixel according to an area ratio between the display pixel and the non-display pixel in the virtual pixel.
The video display device according to claim 1. Each of the display devices includes a non-display luminance correction unit that corrects the luminance of the non-display pixels according to the reflection luminance of the non-pixel region.
The video display device according to claim 1. A plurality of display devices having a display module;
A video signal selection device that outputs a video signal selected from video signals of a plurality of signal sources to each of the plurality of display devices,
A control device that specifies the plurality of display devices as an enlarged display device that performs enlarged display of an image,
The display modules are arranged to form a single display surface;
Each said display module,
A pixel region in which a plurality of pixels are arranged, and a non-pixel region surrounding the pixel region and in which the pixels are not arranged,
Each said display device,
When specified to the enlarged display device, a virtual pixel setting unit that sets a virtual pixel composed of a plurality of adjacent pixels and arranged in the pixel region,
A display control unit that controls display of an image in the pixel region,
The virtual pixel is at least one display pixel that contributes to the display of the image, and a plurality of pixels that do not contribute to the display of the image and extend in at least one of the horizontal direction and the vertical direction. And a non-display pixel of
The width of the non-display area formed of the non-pixel area and the installation gap of the adjacent display module formed between the pixel areas of the adjacent display modules is an integral multiple of the pixel pitch,
The display control unit, in the enlargement display device, displays one pixel of an area of the image corresponding to the position of the display module on the display surface in one virtual pixel, In the apparatus, one pixel of the image is displayed on one pixel.
Video display system.