WO2013051063A1

WO2013051063A1 - Image display system, control device, and display module

Info

Publication number: WO2013051063A1
Application number: PCT/JP2011/005624
Authority: WO
Inventors: 宮原　浩二; 洋平三木; 久野　徹也; 万里子須賀
Original assignee: 三菱電機株式会社
Priority date: 2011-10-06
Filing date: 2011-10-06
Publication date: 2013-04-11
Also published as: JPWO2013051063A1; JP5761359B2

Abstract

The purpose of the present invention is to provide an image display system capable of making border portions between display modules less prominent and preventing degradation of image quality, even when the display modules have been installed in an imprecise manner. In order to achieve the purpose described above, this image display system is provided with: an association information storage unit (11) for storing brightness correction values corresponding to spacing values between display modules (2); a brightness correction value output unit (12) for acquiring, when a spacing value between display modules (2) has been inputted, a brightness correction value corresponding to the spacing value from the association information storage unit (11) and outputting the brightness correction value to a brightness correction unit (13); and the brightness correction unit (13) for correcting, on the basis of the brightness correction value outputted from the brightness correction value output unit (12), the brightness of a plurality of pixels corresponding to a plurality of light-emitting elements located in the vicinity of the border between display modules (2) from among a plurality of pixels constituting the inputted image data.

Description

Image display system, control device, and display module

The present invention relates to an image display system, a control device, and a display module for displaying an image on an image display device configured by arranging a plurality of display modules.

There is known an image display apparatus in which a plurality of display modules in which a plurality of light emitting elements are arranged at equal intervals are arranged in the vertical and horizontal directions to constitute one large screen as a whole. When joining display modules constituting such an image display device, if the gap between the adjacent display modules becomes wider than the distance between adjacent light emitting elements in the display module due to installation displacement, The seam portion appears as a dark line, causing image quality degradation.

However, it takes installation time and installation cost to arrange all the display modules so that the distance between the seams is the same as the distance between the light emitting elements. Therefore, conventionally, among the plurality of light emitting elements arranged in the display module, the brightness of the light emitting element in the vicinity of the joint is corrected so as to be higher than the brightness of the light emitting element in the center portion, thereby making the dark line in the joint portion inconspicuous. (For example, refer to Patent Document 1).

JP 2004-86165 A (paragraph 0289)

However, in the above-mentioned Patent Document 1, it is not considered how much the luminance of the light emitting elements in the vicinity of the joint of each display module is corrected, that is, how to set the luminance correction value. For example, when the luminance correction is performed with the same correction value for each display module, since the interval varies depending on the set of display modules, there is a problem in that a seam portion where dark lines are not eliminated remains and deterioration in image quality cannot be prevented. . In addition, when the interval between the seams between the display modules is narrower than the interval between the light emitting elements, luminance correction with a luminance correction value that makes the luminance of the light emitting elements in the vicinity of the seam higher than the luminance of the light emitting elements in the central portion, There is a problem that the joint portion becomes a bright line and causes deterioration in image quality.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an image display system that can prevent a deterioration in image quality by making a joint portion between display modules inconspicuous.

An image display system according to the present invention includes a control device that corrects luminance of input image data and outputs corrected image data, and the corrected image data from the control device in which a plurality of light emitting elements are arranged. An image display system that displays an image corresponding to the corrected image data on an image display device configured by arranging the plurality of display modules. The apparatus receives an interval value between a first display module of the plurality of display modules and a second display module of the plurality of display modules adjacent to the first display module. A luminance correction value output unit for outputting a luminance correction value for correcting the luminance of the image data corresponding to the input interval value, and the luminance correction value output unit Based on the output luminance correction value, among a plurality of pixels constituting the image data, a plurality of pixels on the first line in the first display module and adjacent to the second display module And a luminance correction unit for correcting the luminance of a plurality of pixels corresponding to the light emitting element.

The control device according to the present invention corrects the brightness of the input image data, outputs the corrected image data to a plurality of display modules in which a plurality of light emitting elements are arranged, and the plurality of display modules are arranged. A display device configured to display an image corresponding to the corrected image data on the first display module of the plurality of display modules and the first display module. A luminance correction value for correcting the luminance of the image data corresponding to the input interval value when an interval value between the second display modules of the plurality of adjacent display modules is input. A luminance correction value output unit for outputting the first display module among the plurality of pixels constituting the image data based on the luminance correction value output from the luminance correction value output unit. A in Yuru, characterized in that it comprises a brightness correcting unit for correcting the luminance of a plurality of pixels corresponding to the plurality of light emitting elements located on the first line adjacent to the second display module.

The display module according to the present invention is a display module in which a plurality of light emitting elements are arrayed together with an image display device that displays a plurality of arrayed images, and is an interval value between adjacent display modules. And a luminance correction value storage unit that stores a luminance correction value for correcting the luminance of the input image data, and the image data based on the luminance correction value stored in the luminance correction value storage unit. And a luminance correction unit that corrects the luminance of a plurality of pixels corresponding to the plurality of light emitting elements on a line adjacent to the adjacent display module.

According to the image display system, the control device, and the display module of the present invention, the luminance of the light emitting element in the vicinity of the seam is corrected with the brightness correction value according to the interval between the seams between the display modules. The resulting dark line or bright line can be made inconspicuous and image quality deterioration can be prevented.

1 is a configuration diagram of an image display system according to Embodiment 1. FIG. FIG. 4 illustrates a display module according to Embodiment 1; FIG. 3 is a diagram for explaining a gap between joints between display modules according to Embodiment 1; FIG. 3 is a diagram for explaining a correspondence relationship between the image display device and image data in the first embodiment. FIG. 3 illustrates an example of an image display device according to Embodiment 1; 3 is a flowchart showing an operation according to the first embodiment. FIG. 6 is a diagram illustrating an example of a luminance correction value stored in a correspondence information storage unit according to the first embodiment. FIG. 6 is a diagram for explaining an example of a method for setting a luminance correction value according to the first embodiment. FIG. 6 is a diagram for explaining luminance correction of image data according to the first embodiment. 6 is a diagram for explaining another example of luminance correction of image data according to Embodiment 1. FIG. FIG. 10 is a diagram illustrating another example of the brightness correction value stored in the correspondence information storage unit according to the first embodiment. 6 is a diagram for explaining another example of luminance correction of image data according to Embodiment 1. FIG. 6 is a diagram for explaining another example of luminance correction of image data according to Embodiment 1. FIG. FIG. 3 is a configuration diagram of an image display system according to a second embodiment. 9 is a flowchart showing an operation according to the second embodiment. FIG. 6 is a configuration diagram of an image display system according to a third embodiment. FIG. 6 is a configuration diagram of a captured image analysis unit according to a third embodiment. 10 is a flowchart showing a joint interval calculation process operation according to the third embodiment. The figure which represented the image display apparatus corresponding to the captured image data which concerns on Embodiment 3 with a rectangular coordinate system.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an image display system according to the first embodiment. FIG. 2 is a diagram for explaining the display module according to the first embodiment. FIG. 3 is a diagram for explaining the interval between the seams between the display modules according to the first embodiment. FIG. 4 is a diagram for explaining the correspondence between the image display device and the image data in the first embodiment. FIG. 5 is a diagram illustrating an example of the image display apparatus according to the first embodiment. FIG. 6 is a flowchart showing the operation according to the first embodiment. FIG. 7 is a diagram illustrating an example of the luminance correction value stored in the correspondence information storage unit according to the first embodiment. FIG. 8 is a diagram for explaining an example of the method of setting the luminance correction value according to the first embodiment. FIG. 9 is a diagram for explaining luminance correction of image data according to the first embodiment. FIG. 10 is a diagram for explaining another example of luminance correction of image data according to the first embodiment. FIG. 11 shows another example of the luminance correction value stored in the correspondence information storage unit according to the first embodiment. FIG. 12 is a diagram for explaining another example of luminance correction of image data according to the first embodiment. FIG. 13 is a diagram for explaining another example of luminance correction of image data according to the first embodiment.

As shown in FIG. 1, the image display system according to the first embodiment of the present invention corrects the luminance of input image data for display and outputs the corrected image data. And a plurality of display modules 2 for outputting image data. The image data is data regarding luminance information of a plurality of pixels constituting the image, and is input to the control device 1 from an external device such as a PC (Personal Computer) or a TV (Television).

First, the details of the display module 2 will be described. As shown in FIG. 2, the display module 2 has a plurality of light emitting elements 4 arranged at equal intervals in the vertical and horizontal directions. Here, the light emitting elements 4 are arranged in 10 rows × 10 columns in one display module 2. The light emitting element 4 is comprised from LED (Light Emitting Diode), and the one light emitting element 4 respond | corresponds to 1 pixel on image data. That is, one pixel is expressed by one light emitting element 4. By arranging a plurality of display modules 2 in which a plurality of light emitting elements 4 are arranged in the vertical and horizontal directions, an image display device 3 that displays one large screen image as a whole is configured.

At this time, the display modules 2 are arranged so that the interval between the adjacent display modules 2, that is, the interval between the joints, is the same as the interval between the light emitting elements 4 arranged in the display module 2. As shown in FIG. 3, the distance between the display module 2-1 and the display module 2-2 is set such that the light emitting elements 4 arranged in the rightmost column of the display module 2-1 and the display module 2-2. It is the distance between the light emitting elements 4 arranged in the leftmost column. The same applies to the interval between the vertical seams, and the interval between the display module 2-1 and the display module 2-3 includes the light emitting elements 4 arranged in the bottom row of the display module 2-1, This is the distance between the light emitting elements 4 arranged in the uppermost row of the display module 2-4. When the interval between the seams between the display modules 2 and the interval between the adjacent light emitting elements 4 in the display module 2 are not the same, the display module 2 is misplaced.

Referring back to FIG. 1, the details of the image display system will be described. The control device 1 includes a correspondence information storage unit 11, a luminance correction value output unit 12, a luminance correction unit 13, and an image dividing unit 14. The display module 2 includes a light emission control unit 21.

In the correspondence information storage unit 11, the interval value of the joint between the adjacent display modules 2 and the brightness correction value are stored in association with each other in advance. The luminance correction value is a value for correcting the luminance of the pixels constituting the image data, and the value differs depending on the interval value of the joint between the display modules 2. In other words, when the interval value of the joint between the display modules 2 is larger than the interval value between the adjacent light emitting elements 4 in the display module 2, the luminance correction value is set to (correction) the luminance of the correction target pixel than when the image data is input. When the interval value of the joint between the display modules 2 is smaller than the interval value between the light emitting elements 4, the luminance of the correction target pixel is made lower than that at the time of image data input. Value. Details of the luminance correction value will be described later.

The brightness correction value output unit 12 receives the interval value of the joint between the first display module and the second display module adjacent to the first display module, and the display module number corresponding to the interval value. Is done. When these pieces of information are input, the luminance correction value output unit 12 acquires a luminance correction value corresponding to the input interval value from the correspondence information storage unit 11. Then, the luminance correction value output unit 12 outputs the acquired luminance correction value and display module number to the luminance correction unit 13. For example, when the interval value between the display module M1 and the display module M2 shown in FIG. 4 is input, the luminance correction value output unit 12 displays the numbers of the display modules M1 and M2 and the luminance correction value corresponding to the interval value. Will be output.

Based on the brightness correction value input from the brightness correction value output unit 12 and the display module number, the brightness correction unit 13 includes the first display module and the second display module among the plurality of pixels constituting the input image data. The luminance of the pixel corresponding to the light emitting element 4 in the vicinity of the joint with the display module is corrected, and the image data after the luminance correction is output. Specifically, the luminance correction unit 13 specifies pixels corresponding to the light emitting elements 4 in the vicinity of the joint between the first display module and the second display module as correction target pixels from the display module numbers, and these pixels. The brightness correction value is added to.

Here, the vicinity of the seam refers to the first line within the first display module and adjacent to the second display module. In FIG. 4, when the first display module corresponds to the display module M1 and the second display module corresponds to the display module M2, the rightmost column of the display module M1 is the first line. That is, the brightness correction unit 13 corrects the brightness of the pixel group A including a plurality of pixels (pixels in the rightmost column) corresponding to the plurality of light emitting elements 4 on the first line.

In addition to the first line, the vicinity of the joint may include the second line in the second display module and adjacent to the first display module. In FIG. 4, the leftmost column of the display module M2 is the second line. The brightness correction unit 13 also corrects the brightness of the pixel group B composed of a plurality of pixels (pixels in the leftmost column) corresponding to the plurality of light emitting elements 4 on the second line. By doing so, the luminance correction unit 13 corrects the luminance of the pixel group A and the pixel group B to be displayed on the light emitting elements 4 on both sides of the joint portion between the display modules 2. Or even if a bright line occurs, this dark line or bright line can be eliminated in a balanced manner.

The plurality of light emitting elements 4 on the first (second) line does not necessarily indicate all the light emitting elements 4 in the row or column in the display module 2. That is, the luminance correction unit 13 does not necessarily perform luminance correction on all the pixels constituting the pixel group A (pixel group B). Further, the first line and the second line are not limited to one row or one column in the display module, and may be a plurality of rows or a plurality of columns.

The image dividing unit 14 divides the image data after luminance correction input from the luminance correcting unit 13 into a plurality of image data (hereinafter referred to as divided image data), and each of the plurality of divided image data corresponds to each display module. Output to 2. The image dividing unit 14 grasps the correspondence between the divided image data and the display module 2.

The image dividing unit 14 may not divide the image data, and the luminance correcting unit 13 may output the image data after the luminance correction to each display module 2 as it is. In that case, each display module 2 receives only the data for the display itself of the transmitted image data.

The light emission control unit 21 reads the luminance of the divided image data output from the image dividing unit 14, and causes the light emitting element 4 to emit light based on the read luminance. Since a predetermined pixel (for example, the pixel group A in FIG. 4) of the plurality of pixels constituting the divided image data has been subjected to luminance correction by the luminance correction unit 13, as a result, a light emitting element corresponding to the luminance corrected pixel 4 (for example, the light emitting element 4 on the first line in FIG. 4) is corrected. That is, the luminance correction unit 13 corrects the luminance of the pixels constituting the divided image data, and as a result, the luminance of the light emitting element 4 is corrected. When the light emitting element 4 emits light, a divided image is displayed on the display module 2, and one image (an image corresponding to the corrected image data) is displayed on the image display device 3. .

Next, the operation of the first embodiment of the present invention will be described with reference to FIGS. Here, the image display device 3 shown in FIG. 5 will be described as an example. The image display device 3 shown in FIG. 5 is configured by arranging the display modules 2 in which the light emitting elements 4 are arranged in 10 rows × 10 columns in 2 rows × 3 columns. The interval value between the light emitting elements 4 is 4 mm. The interval value between the display modules 2-5 and 2-6 constituting the image display device 3 is 8 mm, and the interval is wider than 4 mm. The interval value between the display modules 2-7 and 2-10 is 2 mm. The interval is narrower than 4 mm, and in both cases, installation displacement occurs. Therefore, when an image without luminance correction is displayed on the image display device 3, a dark line is generated at the joint between the display modules 2-5 and 2-6, and the joint between the display modules 2-7 and 2-10 is generated. As a result, a bright line is generated in the image display device 3, which causes deterioration of image quality.

First, as shown in FIG. 6, the brightness correction setting processing operation in the control device 1 before image data is input will be described (step S1 to step S4).

When the display module 2 is arranged and the image display device 3 is assembled, the interval value of the joint between the adjacent display modules 2 and the display module number are input to the luminance correction value output unit 12 from the outside of the control device 1. (Step S1).

The distance between the adjacent display modules 2 is measured by, for example, a person in charge of installing the display module 2. This person in charge of installation installs each set of vertical and horizontal sets as shown in FIG. 5 such as display modules 2-5 and 2-6, display modules 2-6 and 2-7, display modules 2-5, 2-8, The interval value of the seam is measured for the display module 2. Here, since there is a misalignment between the display modules 2-5 and 2-6 and between the display modules 2-7 and 2-10, the display module number and the distance between the joints (8 mm, 2 mm) are the brightness. It is input to the correction value output unit 12.

When the interval value of the seam of each set in which installation deviation has occurred is input, the luminance correction value output unit 12 acquires the luminance correction value corresponding to each interval value (8 mm, 2 mm) from the corresponding information storage unit 11. (Step S2).

In the correspondence information storage unit 11, as shown in the table (a) of FIG. 7, the luminance correction value corresponding to the interval value of the joint is stored. The brightness correction value is a value that increases the brightness when the image data is input when the interval value is larger than 4 mm, and the brightness is lower than that when the image data is input when the interval value is less than 4 mm. A specific value may be a value that is proportional to the interval value, or may be determined based on an empirical rule. Here, as an example, the luminance correction value corresponding to the interval value 8 mm is 8, and the luminance correction value corresponding to the interval value 2 mm is −3. The luminance correction unit 13 acquires these values. In the table (a), the brightness correction value corresponding to the interval value from 1 mm to 8 mm in 1 mm units is stored. However, the present invention is not limited to this, and the step size of the interval value and the range of the interval value are arbitrary. It can be set to. The same applies to the following.

Further, as shown in the table (b) of FIG. 7, the correspondence information storage unit 11 may store a plurality of luminance correction values corresponding to the joint interval values. In this case, the brightness correction value is stored as an array, for example. Even when the luminance correction values are arranged in this manner, the values may be proportional to the interval values or may be determined based on empirical rules as long as the values correspond to the interval values. Here, as an example, the luminance correction value corresponding to the interval value of 8 mm is stored in the correspondence information storage unit 11 as k8, and the luminance correction value corresponding to the interval value of 2 mm is stored as k2. An example of this setting method is shown below.

First, a plurality of base values that are arbitrary values that do not depend on the interval value of the joint between the display modules 2 are determined. For example, when the light emitting elements 4 are arranged in 10 rows × 10 columns in the display module 2, the number of base values may be set to 10 (number 1 to number 10). In the example of FIG. 8, the base values are set to +3, +1, +3, +2,. When the number of light emitting elements 4 differs vertically and horizontally (for example, 10 rows × 15 columns), two types of 10 base values and 15 base values may be prepared.

∙ Multiply each of the base values set in this way by a coefficient corresponding to the joint interval value. For example, when the joint interval value increases by 50% from 4 mm, 1.5 is multiplied, and when the joint interval value decreases by 50, -1.5 is multiplied. In this way, the brightness correction value is obtained by multiplying the base value by the coefficient corresponding to the interval value of the joint.

In the example of FIG. 8, when the interval value of the seam is 8 mm, the interval value increases from 4 mm to 100%, and therefore, a plurality of base values are multiplied by a coefficient 2 respectively. Therefore, the luminance correction value k8 is composed of +6, +2, +6, +4,. When the interval value of the seam is 2 mm, the interval value is reduced by 50% from 4 mm. Therefore, each of the plurality of base values is multiplied by a coefficient −1.5. Therefore, the luminance correction value k2 is configured from −4.5, −1.5, −4.5, −3,.

As described above, the correspondence information storage unit 11 has the luminance correction values as shown in the tables (a) and (b) of FIG. 7, that is, the luminance correction values corresponding to the joint interval values between the display modules 2. Since it is stored, even if the interval value of the seam varies depending on the set of the display modules 2, it is possible to perform luminance correction suitable for each display module 2. That is, when a dark line is generated at a joint portion in one set of display modules 2, the brightness is corrected by the brightness correction value F that increases the brightness of the display modules 2, while the interval of the seams is set in another set of display modules 2. If the dark line generated at the seam portion is deeper, the display module 2 can be corrected for luminance with a luminance correction value larger than the luminance correction value F described above. Further, when the interval between the seams is narrow in another set of the display modules 2 and a bright line is generated at the seam portion, the brightness correction can be performed with a brightness correction value that lowers the brightness of the display modules 2.

Returning to FIG. 4, the luminance correction value output unit 12 outputs the luminance correction value acquired from the correspondence information storage unit 11 and the display module number corresponding to the input interval value to the luminance correction unit 13 (step S3). ).

When the luminance correction value and the display module number are input from the luminance correction value output unit 12, the luminance correction unit 13 holds these and waits (step S4). This completes the brightness correction setting process.

Next, after the brightness correction setting process is completed, processing operations from when image data is input to the control device 1 until an image is displayed on the image display device 3 will be described (step S5 to step S8).

When image data is input from an external device after the luminance correction setting process is completed (step S5), the luminance correction unit 13 displays a display module among a plurality of pixels constituting the image data based on the luminance correction value. The luminance of the pixel at the position corresponding to the vicinity of the joint between the two is corrected (step S6).

When the luminance correction value shown in the table (a) in FIG. 7 is input from the luminance correction value output unit 12, the luminance correction unit 13, as shown in FIG. An interval value of 8 mm is set for a plurality of pixels (pixel group A1) corresponding to the plurality of light emitting elements 4 in the display module 2-5 and on the line (rightmost column) adjacent to the display module 2-6. The corresponding brightness correction value 8 is added. More specifically, the pixel group A1 indicates the 10th row and 10th column from the 1st row and the 10th column on the image data.

As described above, when the input interval value is larger than the interval value between the light emitting elements 4 in the display module 2, the luminance correction value output unit 12 is in the display module 2-5 and the display module 2-6. 8 as a luminance correction value corresponding to the interval value of 8 mm so that the luminance of the plurality of pixels (pixel group A1) corresponding to the plurality of light emitting elements 4 on the line adjacent to is higher than the luminance at the time of input. And the luminance correction unit 13 adds the luminance correction value 8 to a plurality of pixels constituting the pixel group A1, so that the luminance correction unit 13 is suitable for a dark line generated at a joint portion between the display module 2-5 and the display module 2-6. Brightness correction can be performed and can be made inconspicuous.

In addition, as described above, the luminance correction unit 13 includes a plurality of pixels (corresponding to the plurality of light emitting elements 4 on the line (leftmost column) adjacent to the display module 2-5 in the display module 2-6). The brightness correction value 8 may be added to the pixel group B1). More specifically, the pixel group B1 indicates the first row and eleventh column to the tenth row and eleventh column on the image data.

As described above, when the input interval value is larger than the interval value between the light emitting elements 4 in the display module 2, the luminance correction value output unit 12 has the display module 2-5 and the display module 2-5. The luminance correction value 8 may be output so that the luminance of the plurality of pixels (pixel group B1) corresponding to the plurality of light emitting elements 4 on the adjacent line is higher than the luminance at the time of input. The unit 13 adds the brightness correction value 8 to a plurality of pixels constituting the pixel group B1. By doing so, the luminance of the pixel group A1 and the pixel group B1 displayed on the light emitting elements 4 on both sides of the joint portion between the display modules 2-5 and 2-6 is corrected, so that the dark lines generated in the joint portion are balanced. It can be made inconspicuous.

Similarly, the luminance correction unit 13 is a pixel in the pixel group C1, D1 (corresponding to the 10th row 21st column to the 10th row 30th column and the 11th row 21st column to the 11th row 30th column on the image data). The brightness correction value -3 corresponding to the interval value of 2 mm is added to the brightness of.

As described above, when the input interval value is smaller than the interval value between the light emitting elements 4 in the display module 2, the luminance correction value output unit 12 is in the display module 2-7 and the display module 2-10. A luminance correction value -3 corresponding to the interval value of 2 mm is output so that the luminance of the plurality of pixels (pixel group C1) corresponding to the plurality of light emitting elements 4 on the line adjacent to the pixel is lower than the luminance at the time of input. Since the luminance correction unit 13 adds the luminance correction value -3 to the plurality of pixels constituting the pixel group C1, it is preferable for the bright line generated at the joint portion between the display module 2-7 and the display module 2-10. Brightness correction can be performed and can be made inconspicuous. The same applies to the pixel group D1.

When the luminance correction value shown in the table (b) of FIG. 7 is input from the luminance correction value output unit 12, the luminance correction unit 13 applies the pixel group A1 (or B1, or both) as shown in FIG. The brightness correction value k8 is added to the pixel group C1 (or D1, or both), and the brightness correction value k2 is added. In this case, among the plurality of pixels whose luminance is corrected, different luminance correction values are added to some pixels and other pixels. For example, among a plurality of pixels constituting the pixel group A1, the luminance correction value 6 is added to some pixels, 2 is added to another pixel, and the luminance correction value 4 is added to the other pixels. Is added. In addition, the luminance correction value −4.5 is added to some of the plurality of pixels constituting the pixel group C1, and the luminance correction value −1.5 is added to some of the other pixels. Is added with the luminance correction value -3.

As described above, the luminance correction value output unit 12 is configured such that some of the plurality of pixels (pixel groups A1, B1, C1, and D1) corresponding to the plurality of light emitting elements on the line of the display module 2 and others. Even when a luminance correction value different from that of the pixel is output and the luminance correction unit 13 performs the luminance correction based on the luminance correction value, the interval with respect to the dark line or the bright line generated at the joint portion between the display modules 2 is also determined. A suitable luminance correction according to the value can be performed and can be made inconspicuous.

Then, the luminance correction unit 13 outputs the image data after adding the luminance correction value (after luminance correction) to the image dividing unit 14.

The image dividing unit 14 divides the input image data into a plurality of divided image data, and outputs the divided image data to the corresponding display modules 2 (step S7).

When the divided image data is input to each display module 2, the light emission control unit 21 reads the luminance of each pixel constituting the divided image data. And the light emission control part 21 makes each light emitting element 4 light-emit with the read brightness | luminance, and displays a divided image on the display module 2 (step S8).

At this time, since the luminance of the pixel groups A1, B1, C1, and D1 in the divided image data input to the display module 2 is corrected, the light emitting element 4 and the display module 2 in the rightmost column of the display module 2-5. The light emitting elements 4 in the leftmost column of −6 are corrected so as to increase the luminance, and the light emitting elements 4 in the lowermost row of the display module 2-7 and the light emitting elements 4 in the uppermost row of the display module 2 become lower in luminance. Will be corrected.

As a result, when viewed as the entire screen of the image display device 3, the dark line generated at the joint portion between the display modules 2-5 and 2-6 indicates that the luminance of the light emitting element 4 near the joint is in accordance with the interval value. Since it is corrected to be higher, it will not stand out. Further, the bright line generated at the joint portion between the display modules 2-7 and 2-10 is not noticeable because the luminance of the light emitting element 4 in the vicinity of the joint is corrected so as to decrease according to the interval value.

As described above, according to the first embodiment of the present invention, the luminance of the light emitting element in the vicinity of the joint is corrected with the luminance correction value corresponding to the interval value of the seam for the display module 2 in which the installation deviation occurs. Therefore, even when the interval between the seams varies depending on the set of the display modules 2, suitable luminance correction is performed for each, and the seam portion of the entire image displayed on the image display device 3 is made inconspicuous, thereby degrading the image quality. Can be prevented.

Further, when the interval value between the display modules 2 is narrower than that between the light emitting elements 4, luminance correction is performed so as to reduce the luminance of the light emitting elements 4 in the vicinity of the seams, so that the bright line at the seam portion is displayed. It is less noticeable and image quality deterioration can be prevented.

Also, the luminance of a plurality of pixels displayed on the light emitting elements 4 on both sides of the joint portion between the display modules 2 can be corrected, and dark lines or bright lines generated in the joint portion can be made inconspicuous with good balance.

In the meantime, the luminance correction value is stored in the correspondence information storage unit 11, and the luminance correction value output unit 12 acquires the luminance correction value from the correspondence information storage unit 11 and outputs it to the luminance correction unit 13. However, it is not limited to this. When the interval value of the joint is input, the luminance correction value output unit 12 may generate a luminance correction value corresponding to the interval value and output the generated luminance correction value to the luminance correction unit 13. The same applies to the following.

Here, as shown in the table (c) of FIG. 11, the correspondence information storage unit 11 stores a plurality of luminance correction values corresponding to the interval value of the seam and having a luminance difference of a predetermined value or more. May be. Here, a luminance difference of 5 or more is given. The table (c) stores an array of two luminance correction values. For example, when the interval value is 8 mm, the luminance correction value k10 is an array of +8, +1, +8, +1,. , +8, +1, +8,... +8, and the luminance difference is 7. In the case of an interval value of 2 mm, the luminance correction value k9 is an array of −6, −1, −6, −1,... -1, and −1, −6, −1, −6,. The brightness difference is 5. Therefore, the luminance correction values k9 and k10 have a luminance difference of 5 or more.

Further, in order to have a predetermined luminance difference, as shown in the table (d) of FIG. 11, a luminance correction value with an opposite sign may be used for a part of the plurality of luminance correction values. For example, when the interval value is 8 mm, the luminance correction value k12 is set to an array of +5, -2, +5, -2, ..- 2 and an array of -2, +5, -2, +5,. The luminance difference is 7. When the interval value is 2 mm, the luminance correction value k11 is set to an array of -4, +1, -4, +1, ... +1 and an array of +1, -4, +1, -4, ... -4, The luminance difference is 5. Therefore, the brightness correction values k11 and k12 have a brightness difference of 5 or more. However, even when the brightness correction values of both codes are used in this way, as a whole pixel group subjected to brightness correction, when the interval value between the display modules 2 is larger than the interval value between the light emitting elements 4, When the luminance is higher than that at the time of input and the interval value between the display modules 2 is smaller than the interval value of the light emitting element 4, the luminance must be lower than that at the time of input. Therefore, when the interval value between certain display modules 2 is 8 mm, the luminance correction value may be an array of +5, -2, +5, -2, -2, but the luminance of the entire pixel group is lowered. It must not be -5, +2, -5, +2,.

Here, the predetermined luminance difference is set to 5 or more. However, as to how much the predetermined luminance difference is to be given, a suitable value may be calculated in advance by a test or the like. Moreover, the value based on an empirical rule may be sufficient.

When the luminance correction value output unit 12 outputs, for example, the luminance correction value k10, the luminance correction unit 13 adds the luminance correction value 8 to some pixels of the pixel group A1, as shown in FIG. A luminance correction value 1 is added to the pixel. Therefore, the luminance correction value added to some of the pixels in the pixel group A1 is a value that is a predetermined luminance difference 7 higher than the luminance correction value added to the other pixels. Further, the luminance correction value 8 is added to the pixel in the pixel group B1 adjacent to the pixel to which the luminance correction value 1 in the pixel group A1 is added, and the luminance correction value 8 in the pixel group A1 is added. A luminance correction value 1 lower by a predetermined luminance difference 7 is added to the pixels in the pixel group B1 adjacent to the pixel.

When the luminance correction value output unit 12 outputs the luminance correction value k12, the luminance correction unit 13 adds the luminance correction value +5 to some pixels of the pixel group A1, as shown in FIG. The luminance correction value -2 is added to the pixels. Therefore, the luminance correction value added to some of the pixels in the pixel group A1 is a value that is a predetermined luminance difference 7 higher than the luminance correction value added to the other pixels. Further, the luminance correction value +5 is added to the pixel in the pixel group B1 adjacent to the pixel to which the luminance correction value -2 in the pixel group A1 is added, and the luminance correction value +5 in the pixel group A1 is added. A luminance correction value -2 having a predetermined luminance difference of 7 is added to the pixels in the pixel group B1 adjacent to the pixel.

As described above, the luminance correction value output unit 12 outputs a luminance correction value output to some of the plurality of pixels constituting the pixel group A1 by a predetermined difference from the luminance correction value output to other pixels. A luminance correction value to be output to a pixel adjacent to a part of the pixels of the pixel group A1 among the plurality of pixels constituting the pixel group B1 adjacent to the pixel group A1 as well as other values of the pixel group A1. The luminance correction unit 13 performs a luminance correction based on the luminance correction value, which is lower than the luminance correction value output to the pixel adjacent to the pixel, and thereby the luminance of the plurality of light emitting elements 4 in the vicinity of the joint. Therefore, it is possible to prevent the occurrence of a boundary line between the vicinity of the seam and the central portion (portion other than the vicinity of the seam) in the display module, and further prevent deterioration of the image quality. it can.

That is, when the interval between the display modules 2 is widened, if the brightness of all the light emitting elements 4 in the vicinity of the joint is corrected to be higher than that at the time of input, the dark line in the joint portion becomes inconspicuous. In the display module, the luminance difference between the central portion of the display module and the vicinity of the joint becomes large (the vicinity of the joint becomes too bright), and a boundary line may be generated between these regions. However, as described above, the luminance of the light emitting element 4 in the vicinity of the joint is thinned out and corrected so that the dark line in the joint can be made inconspicuous, and the boundary generated between the central portion and the vicinity of the joint in the display module. It is also possible to prevent the generation of lines, thereby further preventing image quality deterioration. The same applies to the case of preventing the occurrence of bright lines near the joint between display modules.

Here, in order to give a predetermined luminance difference between the luminance correction value output to some of the pixels constituting the pixel group and the luminance correction value output to other pixels, the tables (c) and (c) in FIG. As shown in d), a value in which brightness correction values having a predetermined brightness difference are alternately arranged is used, but the present invention is not limited to this. For example, +8, +1, +1, +8,. Thus, it may be aperiodic, or may be arranged so as to have a luminance difference in stages, such as +8, +3, +1, +3, +8,.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to the drawings. FIG. 14 is a configuration diagram of an image display system according to the second embodiment. FIG. 15 is a flowchart showing the operation according to the second embodiment. Portions corresponding to the configuration of the image display system according to the first embodiment are denoted by the same reference numerals as those in FIG.

In the image display system according to the second embodiment, as shown in FIG. 14, each display module 2 includes a luminance correction value storage unit 22 and a luminance correction unit 23, and the display module 2 performs luminance correction of the image data. This is different from the first embodiment.

The luminance correction value storage unit 22 displays the luminance correction value corresponding to the interval value of the seam between the first display module and the second display module input from the luminance correction value output unit 11 of the control device 1 and the display. The module number is stored.

When the divided image data is input from the image dividing unit 14 of the control device 1, the luminance correction unit 23 configures the divided image data based on the luminance correction value obtained from the luminance correction value storage unit 22 and the display module number. Among the plurality of pixels, the luminance of the pixel corresponding to the light emitting element 4 in the vicinity of the joint between the first display module and the second display module is corrected. That is, the luminance correction unit 23 in the first display module includes the first pixel adjacent to the second display module in the first display module among the plurality of pixels constituting the input divided image data. The luminance of a plurality of pixels corresponding to the plurality of light emitting elements 4 on the line is corrected. The luminance correction unit 23 in the second display module is on a second line within the second display module and adjacent to the first display module among the plurality of pixels constituting the input divided image data. The luminance of a plurality of pixels corresponding to the plurality of light emitting elements 4 is corrected.

As in the first embodiment, the plurality of light emitting elements 4 on the first (second) line does not necessarily indicate all the light emitting elements 4 in the row or column in the display module 2. Further, the first (second) line is not limited to one row or one column in the display module, and may be a plurality of rows or a plurality of columns.

The operation in the second embodiment of the present invention will be described with reference to FIGS. As an example for explaining this operation, the image display device 3 shown in FIG. 5 is used as in the first embodiment. The interval value of the joint between the display modules 2 and the conditions such as the combination of the display modules 2 in which the installation deviation occurs are the same as in the first embodiment.

First, the luminance correction setting processing operation in the display module 2 before image data is input will be described (step S01 to step S05).

When the display module 2 is arranged and the image display device 3 is assembled, the interval value (8 mm) between the display modules 2-5 and 2-6 shown in FIG. The interval value (2 mm) between the seams 7 and 2-10 and the display module number corresponding to the interval value between these seams are input to the luminance correction value output unit 12 (step S01).

The luminance correction value output unit 12 acquires a luminance correction value corresponding to the input joint interval value (8 mm, 2 mm) from the correspondence information storage unit 11 (step S02).

Then, the luminance correction value output unit 12 outputs the luminance correction value corresponding to the interval value of 8 mm and the display module number to the luminance correction value storage unit 22 of the display modules 2-5 and 2-6. 7 and 2-10, the brightness correction value corresponding to the interval value of 2 mm and the display module number are output to the brightness correction value storage unit 22 (step S03).

Each of the display modules 2-5, 2-6, 2-7, 2-10 receives the luminance correction value corresponding to the interval value and the display module number from the luminance correction value output unit 12, and the luminance correction value storage unit When these are stored in 22 (step S04), the luminance correction unit 23 acquires and holds these pieces of information from the luminance correction value storage unit 22, and stands by (step S05). This completes the brightness correction setting process.

Next, after the brightness correction setting process is completed, the processing operation from when the image data is input to the control device 1 until the image is displayed on the image display device 3 will be described (step S06 to step S09).

When image data is input from an external device after completion of the brightness correction setting process (step S06), the image dividing unit 14 divides the input image data into a plurality of divided image data, and the corresponding display modules are provided. 2 is output to the luminance correction unit 23 (step S07).

The luminance correction unit 23 of each display module 2-5, 2-6, 2-7, 2-10 is based on the luminance correction value that has been held, and is in the vicinity of the seam among the plurality of pixels constituting the divided image data. The luminance of the pixel at the position corresponding to is corrected (step S08). For example, the luminance correction unit 23 in the display module 2-5 includes a plurality of pixels constituting the input divided image data in the display module 2-5 based on the input luminance correction value and the display module number. Thus, the luminance of the pixel corresponding to the light emitting element 4 on the line adjacent to the display module 2-6 (pixel in the rightmost column) is corrected. The same applies to the other display modules 2. The luminance of the pixels in the leftmost column in the display module 2-6, the lowermost row in the display module 2-7, and the uppermost row in the display module 2-10 is corrected.

The light emission control unit 23 of each display module 2-5, 2-6, 2-7, 2-10 reads the luminance of each pixel constituting the luminance-corrected divided image data. And each light emitting element 4 is light-emitted with the read brightness | luminance, and a divided image is displayed on each display module (step S09). At this time, the luminance of the light emitting elements 4 in the rightmost column of the display module 2-5 and the leftmost column of the display module 2-6 is higher than that when the divided image data is input. The luminance of the light emitting elements 4 in the uppermost row of the module 2-10 is corrected so as to be lower than that when the divided image data is input.

As a result, when viewed as the entire screen of the image display device 3, the dark line generated at the joint between the display modules 2-5 and 2-6 is corrected so that the luminance of the light emitting element 4 in the vicinity of the joint is increased. Because it is inconspicuous. Further, the bright line generated at the joint portion between the display modules 2-7 and 2-10 is not conspicuous because the brightness of the light emitting element 4 in the vicinity of the joint is corrected to be low.

As described above, according to the second embodiment of the present invention, as in the first embodiment, light emission in the vicinity of the joint is performed with respect to the display module 2 in which the installation deviation has occurred with a luminance correction value corresponding to the interval value of the joint. Since the luminance of the element is corrected, even when the interval of the seam varies depending on the set of the display modules 2, appropriate luminance correction is performed for each, and the seam portion of the entire image displayed on the image display device 3 is obtained. Can be made inconspicuous and image quality deterioration can be prevented.

Embodiment 3 FIG.
Embodiment 3 of the present invention will be described below with reference to the drawings. FIG. 16 is a configuration diagram of an image display system according to the third embodiment. FIG. 17 is a configuration diagram of a captured image analysis unit according to the third embodiment. FIG. 18 is a flowchart showing the calculation processing operation of the joint interval value according to the third embodiment. FIG. 19 is a diagram showing an image display device corresponding to captured image data according to the third embodiment in an orthogonal coordinate system. Portions corresponding to the configuration of the image display system according to the first embodiment are denoted by the same reference numerals as those in FIG.

In the image display system according to the third embodiment, the image display device 3 in which the display module 2 is assembled is picked up by an image pickup device such as an external camera, and the control device 1 analyzes the picked-up image data so that the interval value of the seam is obtained. Is different from the first embodiment in that

As illustrated in FIG. 16, when captured image data is input, the captured image analysis unit 15 provided in the control device 1 analyzes the input captured image data and displays between the display modules 2 in which the installation deviation occurs. The interval value of the joint is calculated and output to the luminance correction value output unit 12. As illustrated in FIG. 17, the captured image analysis unit 15 includes a captured image data input unit 150, an interval value calculation unit 151, and an installation deviation determination unit 152.

The captured image data input unit 150 is an interface through which captured image data is input from the imaging device, and outputs the input captured image data to the interval value calculation unit 151.

The interval value calculation unit 151 uses a captured image data output from the captured image data input unit 150, a first display module constituting the image display device 3 for captured image data, and a second adjacent to the first display module. The interval value of the joint between the display module and the interval value between the adjacent light emitting elements 4 in the display module 2 is calculated. Details of the calculation method will be described later.

The installation deviation determination unit 152 compares the interval value between the seams between the display modules 2 calculated by the interval value calculation unit 151 and the interval value between the light emitting elements 4, and determines whether or not there is an installation deviation between the display modules 2. Determine whether. When it is determined that the installation deviation has occurred, the interval value of the joint between the display modules 2 and the display module number are output to the luminance correction value output unit 12. When it is determined that there is no installation deviation, a signal indicating that there is no installation deviation is output to the luminance correction value output unit 12.

The operation of the interval value calculation process performed by the captured image data analysis unit 15 will be described with reference to FIGS.

When the captured image data is input (step S001), the captured image data input unit 150 outputs the captured image data to the interval value calculation unit 151. The captured image data is an image display device 3 configured by arranging a plurality of display modules 2, and needs to be image data in a state where the light emitting elements 4 at the four corners of each display module 2 emit light. is there. Here, as shown in FIG. 19, the following description will be made using captured image data of the image display device 3 in which the display module 2 in which the plurality of light emitting elements 4 are arranged is arranged in N rows × N columns.

The interval value calculation unit 151 performs a coordinate conversion process so that the vertical and horizontal directions of the image display device 3 of the input captured image data become horizontal and vertical, and analyzes the image data using the xy coordinates in the orthogonal coordinate system. The interval value between the light emitting elements 4 and the interval value between the display modules 2 are calculated.

First, the interval value calculation unit 151 calculates an interval value between the light emitting elements 4 based on the xy coordinates of the light emitting elements 4 at the four corners in each display module 4 (step S002). As shown in FIG. 19, the coordinates (0,0) of the light emitting element 4 at the upper left corner of the display module 2-11 and the coordinates (c, 0) of the light emitting element 4 at the upper right corner of the display module 2-1N are marked. Then, the horizontal length c of the image display device 3 is calculated. Here, it is assumed that the value c is equal to the value of the horizontal length of the actual image display device 3.

Next, when the length c is divided by the number obtained by subtracting 1 from the number of the light emitting elements 4 existing in one row of the image display device 3, the interval value between the light emitting elements 4 is obtained. For example, in the image display device 3 shown in FIG. 19, ten light emitting elements 4 are arranged in one row in one display module 2, and therefore exist in one row in the image display device 3. The number of light emitting elements 4 to be performed is 10N. Therefore, the interval value between the light emitting elements 4 is c / (10N-1). The same applies to the interval value between the light emitting elements 4 in the vertical direction.

18, the interval value calculation unit 151 next calculates the interval value of the joint between the display modules 2 (step S003). Here, the display module 2-11 has the coordinates (a, 0) of the light emitting element 4 at the upper right corner and the coordinates (b, 0) of the light emitting element 4 at the upper left corner of the display module 2-12 as marks. The interval value (ba) of the joint between 2-11 and 2-12 is calculated. The interval value calculating unit 151 calculates the calculated interval value c / (10N-1) between the light emitting elements 4 and the interval value (ba) of the joint between the display modules 2-11 and 2-12. Output to.

The installation deviation determination unit 152 compares the interval value c / (10N-1) between the light emitting elements 4 with the interval value (ba) of the joint between the display modules 2-11 and 2-12, and displays the display module 2- It is determined whether or not there is any installation deviation between 11 and 2-12 (step S004).

If both are the same value (step S005-Yes), the installation deviation determination unit 152 determines that there is no installation deviation between the display modules 2-11 and 2-12 (step S006).

If they are not the same value (step S005-No), the installation deviation determination unit 152 determines that there is an installation deviation between the display modules 2-11 and 2-12 (step S007). Then, the installation deviation determination unit 152 outputs the joint gap value (b−a) between the display modules 2-11 and 2-12 to the luminance correction value output unit 12 (step S008).

When the above processing for all the combinations of the display modules 2 is completed (step S009-Yes), the captured image data analysis unit 15 ends the calculation processing of the interval value of the joint between the display modules 2. If the above processing has not been completed for all the combinations of the display modules 2 (step S009-No), the captured image data analysis unit 15 applies to the display modules 2 different from the display modules 2-11 and 2-12. Thus, the processing from step S003 is repeated.

As described above, the control device 1 performs the brightness correction setting process and the brightness correction process based on the interval value of the joint between the display modules 2 calculated by the captured image analysis unit 15. Since this is the same as the first embodiment, the description thereof is omitted.

As described above, according to the third embodiment of the present invention, the captured image analysis unit 15 analyzes the captured image data of the image display device 3 captured by the imaging device, thereby displaying a display in which an installation shift has occurred. Since the interval value of the joint between the modules 2 is calculated, in addition to the effect of the first embodiment, the work load of the person in charge of installation can be greatly reduced. That is, it is not necessary for the person in charge of installation to measure the interval values of the joints between the display modules 2 one by one, and only the captured image data of the image display device 3 captured by the imaging device is output to the control device 1. Since the brightness correction setting process is automatically completed, the workload can be greatly reduced.

It should be noted that the control device 1 according to the second embodiment can achieve the same effects as those of the present embodiment by including the captured image analysis unit 15.

DESCRIPTION OF SYMBOLS 1 Control apparatus 11 Corresponding information storage part 12 Brightness correction value output part 13 Brightness correction part 14 Image division part 15 Captured image analysis part 150 Captured image data input part 151 Interval value calculation part 152 Installation deviation determination part 2 Display module 21 Light emission control part 22 brightness correction value storage unit 23 brightness correction unit 3 image display device 4 light emitting element

Claims

A control device for correcting the luminance of the input image data and outputting the corrected image data; a plurality of display modules in which a plurality of light emitting elements are arranged and the corrected image data from the control device is input; An image display system that displays an image corresponding to the corrected image data on an image display device configured by arranging the plurality of display modules.
The control device includes:
When an interval value between the first display module of the plurality of display modules and the second display module of the plurality of display modules adjacent to the first display module is input, A luminance correction value output unit that outputs a luminance correction value for correcting the luminance of the image data corresponding to the input interval value;
Based on the brightness correction value output from the brightness correction value output unit, among the plurality of pixels constituting the image data, the second display module is adjacent to the second display module in the first display module. An image display system comprising: a luminance correction unit configured to correct the luminance of a plurality of pixels corresponding to the plurality of light emitting elements on one line.
The luminance correction value output unit corresponds to the plurality of light emitting elements on the first line when the inputted interval value is larger than an interval value between the adjacent light emitting elements in the display module. Output a luminance correction value that increases the luminance of the plurality of pixels higher than the input luminance, and when the input interval value is smaller than the interval value between the adjacent light emitting elements in the display module, 2. The image display according to claim 1, wherein a luminance correction value that outputs a luminance of the plurality of pixels corresponding to the plurality of light emitting elements on the first line is lower than a luminance at the time of input. system.
The brightness correction unit is located in the second display module among the plurality of pixels constituting the image data based on the brightness correction value output from the brightness correction value output unit, and 3. The image display system according to claim 1, wherein brightness of a plurality of pixels corresponding to the plurality of light emitting elements on the second line adjacent to the line is corrected.
The brightness correction value output unit, when the input interval value is larger than the interval value between the adjacent light emitting elements, the plurality of pixels corresponding to the plurality of light emitting elements on the second line. Output a brightness correction value that makes the brightness of the input higher than the input brightness,
When the input interval value is smaller than the interval value between the adjacent light emitting elements, the luminance of the plurality of pixels corresponding to the plurality of light emitting elements on the second line is greater than the luminance at the time of input. The image display system according to claim 3, wherein a luminance correction value for lowering is also output.
The luminance correction value output unit outputs a luminance correction value to be output to some of the plurality of pixels corresponding to the plurality of light emitting elements on the first line to other pixels. A value that is a predetermined difference higher than the value,
Of the plurality of pixels corresponding to the plurality of light emitting elements on the second line, the partial pixel of the plurality of pixels corresponding to the plurality of light emitting elements on the first line. The luminance correction value output to the pixel adjacent to the pixel is determined based on the luminance correction value output to the pixel adjacent to the other pixel among the plurality of pixels corresponding to the plurality of light emitting elements on the first line. The image display system according to claim 3 or 4, wherein a predetermined difference is set to a low value.
The control device calculates an interval value between the first display module and the second display module based on captured image data of the image display device captured by the imaging device, and outputs the brightness correction value The image display system according to claim 1, further comprising a captured image analysis unit that outputs to the unit.
The captured image analysis unit includes:
An interval value calculation unit that calculates an interval value between the first display module and the second display module and an interval value between the adjacent light emitting elements in the display module from the captured image data;
When the interval value between the display modules calculated by the interval value calculation unit is compared with the interval value between the light emitting elements to determine an installation error, and when it is determined that an installation error has occurred, the display module The image display system according to claim 6, further comprising an installation deviation determination unit that outputs an interval value therebetween to the luminance correction value output unit.
The brightness of the input image data is corrected, the corrected image data is output to a plurality of display modules in which a plurality of light emitting elements are arranged, and the image display device configured by arranging the plurality of display modules in the image display device A control device that displays an image corresponding to the corrected image data,
When an interval value between the first display module of the plurality of display modules and the second display module of the plurality of display modules adjacent to the first display module is input, A luminance correction value output unit that outputs a luminance correction value for correcting the luminance of the image data corresponding to the input interval value;
Based on the brightness correction value output from the brightness correction value output unit, among the plurality of pixels constituting the image data, the second display module is adjacent to the second display module in the first display module. And a luminance correction unit that corrects luminance of a plurality of pixels corresponding to the plurality of light emitting elements on one line.
A display module in which a plurality of light-emitting elements are arranged, and a plurality of light-emitting elements are arranged to form an image display device that displays an image.
A luminance correction value storage unit that stores a luminance correction value for correcting the luminance of the input image data in correspondence with the interval value between adjacent display modules;
A plurality of pixels corresponding to a plurality of light emitting elements on a line adjacent to the adjacent display module among a plurality of pixels constituting the image data, based on the luminance correction value stored in the luminance correction value storage unit. A display module comprising: a luminance correction unit that corrects the luminance of the pixels.
The luminance correction value stored in the luminance correction value storage unit is a plurality of the light emitting elements on the line when the interval value is larger than the interval value between the adjacent light emitting elements in the display module. If the interval value is smaller than the interval value between the adjacent light emitting elements in the display module, the plurality of pixels on the line The display module according to claim 9, wherein the display module has a value for lowering the luminance of the plurality of pixels corresponding to the light emitting element than that at the time of input.