WO2021054696A1

WO2021054696A1 - Display device, server, and method for correcting display device

Info

Publication number: WO2021054696A1
Application number: PCT/KR2020/012431
Authority: WO
Inventors: 김광민
Original assignee: 삼성전자주식회사
Priority date: 2019-09-20
Filing date: 2020-09-15
Publication date: 2021-03-25
Also published as: KR20210034279A

Abstract

The disclosed invention provides: a display device in which color correction can be conveniently performed using a mobile device without connecting additional equipment; a server; and a method for correcting the display device. A display device according to one embodiment comprises: a plurality of display panels; a plurality of module controllers for controlling the plurality of display panels, respectively; and a communication unit for communicating with the server. When a command for color correction is input, the plurality of module controllers control the plurality of display panels to each display a configuration pattern, which includes configuration information for the display panel, and a white image used for white balance adjustment. When the communication unit receives correction information for compensating for color deviation between the plurality of display panels from the server, the plurality of module controllers adjust the configuration information on the basis of the received correction information.

Description

Display device, server and method of calibration of display device

The disclosed invention relates to a display device including a plurality of display panels, a server for managing such a display device, and a method of correcting the color or brightness of the display device.

A display device including a plurality of display panels is a device that displays one image by combining images output from each display panel, such as a multivision system, video wall, signage, etc. It can be referred to by various names.

Such a display device may display one source image by outputting a plurality of partial images constituting one source image through a plurality of display panels, respectively.

A plurality of display panels, which are physically separate devices, each have independent characteristics. Accordingly, color deviation may occur between a plurality of display panels.

The disclosed invention provides a display device, a server, and a method of calibrating a display device that can conveniently perform color correction using a mobile device without connecting additional equipment.

A display device according to an embodiment includes a plurality of display panels; A plurality of module controllers respectively controlling the plurality of display panels; And a communication unit that communicates with the server; wherein, when a command for color correction is input, the plurality of module controllers are configured to adjust a setting pattern including setting information of the display panel and a white balance. A white image to be used is controlled to be displayed, and when the communication unit receives correction information for compensating for color deviation between the plurality of display panels from the server, the setting information is adjusted based on the received correction information.

The setting information may include at least one of an RGB gain value, an RGB offset value, and a brightness value of a light source.

The communication unit may include a plurality of communication units respectively corresponding to the plurality of display panels.

The plurality of communication units may each receive correction information for a corresponding display panel.

Each of the plurality of module controllers may adjust the setting information based on correction information for a display panel controlled by the plurality of module controllers.

According to an exemplary embodiment, the server includes: a communication unit configured to receive an image of a display device or information about an image of the display device, which has captured a display device including a plurality of display modules from a mobile device; And generating correction information for compensating for color deviation between the plurality of display modules based on information on the image of the display device and setting information of each of the plurality of display modules, and the communication unit displays the correction information. It includes; a control unit for controlling the transmission to the device.

The information on the image of the display device may include at least one of a plurality of color coordinate values respectively corresponding to the plurality of display modules and a plurality of luminance values respectively corresponding to the plurality of display modules.

The communication unit may receive setting information of each of the plurality of display modules from the mobile device.

When the communication unit receives the image of the display device from the mobile device, the controller recognizes a plurality of setting patterns from the received image of the display device, and Setting information can be obtained.

When the communication unit receives the image of the display device from the mobile device, the controller may obtain information about the image of the display device from the received image of the display device.

The controller may generate correction information for each of the plurality of display modules based on information about the image of the display device, target image information, and setting information of each of the plurality of display modules.

The setting information includes at least one of an RGB gain value, an RGB offset value, and a brightness value of a light source, and the correction information includes a correction value for an RGB gain, an RGB offset. It may include at least one of a correction value for and a correction value for brightness of the light source.

The controller may calculate a correction value for an RGB gain of each of the plurality of display modules based on the plurality of color coordinate values, target color coordinate values, and RGB gain values included in the setting information.

The communication unit may receive an illuminance sensor value from the mobile device.

The control unit sets a target luminance value based on the received illuminance sensor value, and a plurality of display modules based on the target luminance value, the plurality of luminance values, and brightness values of a plurality of light sources included in the setting information A correction value for the brightness of each light source can be calculated.

The control unit may obtain distance information between the viewers of each of the plurality of display modules based on the image of the display device.

The controller sets a target luminance value based on distance information from the viewer, and a plurality of display modules based on the target luminance value, the plurality of luminance values, and luminance values of a plurality of light sources included in the setting information. A correction value for the brightness of each light source can be calculated.

The correction information includes a plurality of set of correction values for each of the plurality of display modules, and the controller may control the communication unit to transmit a set of correction values for each to the plurality of display modules.

In a method for calibrating a display device including a plurality of display modules according to an embodiment, an image of a display device photographing a display device displaying a setting pattern and a white image from a mobile device or information about the image of the display device Receive; Generating correction information for compensating for color deviation between the plurality of display modules based on information about the image of the display device and setting information of each of the plurality of display modules; And transmitting the correction information to the display device.

Recognizing the setting pattern to obtain the setting information; may further include.

It may further include; receiving the setting information from the mobile device.

The generating of the correction information includes generating correction information for each of the plurality of display modules based on information about the image of the display device, target image information, and setting information of each of the plurality of display modules; can do.

It may further include; receiving an illuminance sensor value from the mobile device.

Generating the correction information may include setting a target luminance value based on the received illuminance sensor value, and based on the target luminance value, the plurality of luminance values, and luminance values of a plurality of light sources included in the setting information. It may include; calculating a correction value for the brightness of the light source of each of the plurality of display modules.

Generating the correction information may include acquiring distance information from the viewers of each of the plurality of display modules based on the image of the display device.

Generating the correction information may include setting a target luminance value based on distance information from the viewer, and based on the target luminance value, the plurality of luminance values, and luminance values of a plurality of light sources included in the setting information. It may include; calculating a correction value for the brightness of the light source of each of the plurality of display modules.

According to the method for calibrating a display device, a server, and a display device according to an aspect of the disclosed invention, color correction can be conveniently performed using a mobile device without connecting separate equipment.

1 is an external view illustrating an example of a display device according to an exemplary embodiment.

2 is a diagram illustrating an example of an image displayed on a display device according to an exemplary embodiment.

3 is a diagram schematically illustrating a process of performing color correction by a display device and a server according to an exemplary embodiment.

4 is a control block diagram of a display device according to an exemplary embodiment.

5 is a diagram illustrating an example of an image displayed on a display device according to an exemplary embodiment for color correction.

6 is a diagram illustrating an example of information included in a setting pattern displayed on a display device according to an exemplary embodiment.

7 and 8 are diagrams illustrating a mobile device photographing a display device according to an exemplary embodiment.

9 is a control block diagram of a server according to an embodiment.

10 is a table showing an example of image information used by a server to generate correction information according to an embodiment.

11 is a diagram illustrating an image of a display device received by a server according to an exemplary embodiment divided into a plurality of regions.

12 is a table showing an example of correction information for luminance generated by a server according to an embodiment.

13 and 14 are diagrams for explaining an operation in which a server obtains distance information between a display device and a viewer according to an exemplary embodiment.

15 is a table showing an example of correction information for an RGB gain generated by a server according to an embodiment.

16 is a table showing an example of correction information for one display module generated by a server according to an embodiment.

17 and 18 are flowcharts illustrating a method of calibrating a display device according to an exemplary embodiment.

The same reference numerals refer to the same elements throughout the specification. This specification does not describe all elements of the embodiments, and general content in the technical field to which the present invention belongs or overlapping content between the embodiments will be omitted. The term'unit, module, member, block' used in the specification may be implemented in software or hardware, and according to embodiments, a plurality of'units, modules, members, blocks' may be implemented as one component, It is also possible for one'unit, module, member, block' to include a plurality of components.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only the case of being directly connected, but also the case of indirect connection, and the indirect connection includes connection through a wireless communication network. do.

In addition, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Throughout the specification, when a component controls another component, this is not only when the component directly controls another component, but also through another component between a component and another component. Includes cases. In this case, signals transmitted between the components may be different.

In addition, when a component transmits or transmits a signal or data to another component, this means that there is another component between the component and the other component unless otherwise stated, and through this component. It does not exclude transmission or transmission, and it is possible to change the shape of the transmitted signal or data.

Singular expressions include plural expressions, unless the context clearly makes exceptions.

The expressions of ordinal numbers such as "first" and "second" are for distinguishing a plurality of elements or information from each other, and do not define an order between them.

In each step, an identification code is used to identify each step and does not describe the order of each step, and each step may be implemented differently from the specified order unless a specific order is clearly stated in the context.

Hereinafter, exemplary embodiments of a display device, a server, and a method of calibrating the display device according to an aspect will be described in detail with reference to the accompanying drawings.

1 is an external view illustrating an example of a display device according to an exemplary embodiment, and FIG. 2 is a diagram illustrating an example of an image displayed on a display device according to an exemplary embodiment.

Referring to FIG. 1, a display device 1 according to an exemplary embodiment may include a plurality of display modules 100. As shown in FIG. 1, a plurality of display modules 100 may be arranged in two dimensions or may be arranged in one dimension.

The display device 1 may be managed by a server 200 connected wirelessly.

The plurality of display modules 100 may independently display an image. When the plurality of display modules 100 are set to the video wall mode or the multi-vision mode, a plurality of images displayed by the plurality of display modules 100 may be combined to implement one image. Alternatively, when the plurality of display modules 100 are not set to the video wall mode or the multi-vision mode, the plurality of display modules 100 may each display independent images. In this case, the same image or different images may be displayed.

2, the first display module 100-1, the second display module 100-2, the third display module 100-3, and the fourth display module 100-4 in a clockwise direction. When a source image is input to the display device 1, the first display module 100-1, the second display module 100-2, the third display module 100-3, and the fourth display are The source image may be delivered according to a loop-out method or a daisy-chain method according to the order of the module 100-4.

The first display module 100-1 displays a first partial image I ₁ allocated to itself among all source images, and the second display module 100-2 displays a second partial image I 1 allocated to itself among all source images. A partial image (I ₂ ) is displayed, and the third display module (100-3) displays a third partial image (I ₃ ) allocated to itself among all the source images, and the fourth display module (100-4) _{A fourth partial image (I 4} ) allocated to itself among all the source images may be displayed. For example, each display module may enlarge and display a source image to display a partial image allocated to it.

This type of display device 1 can be referred to by various names such as multi-vision system, video wall, and signage, and can be used for various purposes such as billboards, information boards, and billboards used indoors or outdoors while implementing a large screen. have. Regardless of what name it is referred to and for what purpose, any display device including a plurality of display modules may be the display device 1 according to an exemplary embodiment.

In the examples of FIGS. 1 and 2, a display device in which a total of four display modules are arranged in a 2x2 matrix is exemplified, but this is only an example applicable to the display device 1, and the display module included in the display device 1 There are no restrictions on the number or arrangement method. The number of display modules may be one or more, and in the case of two or more, the arrangement may be one-dimensional or two-dimensional.

However, in an exemplary embodiment to be described later, a display device in which a total of four display modules are arranged in a 2x2 matrix as shown in FIGS. 1 and 2 will be described as an example for detailed description.

Each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 includes a display panel that displays an image and a controller that controls the display panel. Since the characteristics of the display panels included in each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 are different, even if the same color is displayed, the color actually displayed to the viewer may be different for each display panel. The color deviation between the display panels causes the quality of the image to deteriorate. Accordingly, the display device 1 and the server 200 according to an exemplary embodiment perform correction to compensate for color deviation between display panels.

Referring to FIG. 3, ① display device 1 includes a setting pattern and white balance including setting information of a corresponding display module in each of a plurality of display modules 100-1, 100-2, 100-3, and 100-4. Displays the white image used for adjustment. In an embodiment to be described later, the setting information of the display module means setting information of the display panel included in the display module.

② When the mobile device 300 photographs the

display device

1, and ③ transmits the photographed image or information on the photographed image to the

server

200, ④ the server 200 is based on the information on the photographed image. Thus, correction information for compensating for color deviation between the plurality of display modules 100-1, 100-2, 100-3, and 100-4 is generated.

⑤ When the server 200 transmits the generated correction information to the display device 1, ⑥ the display device 1 can adjust the setting information based on the received correction information.

According to this method, color correction of the display device can be performed without connecting complex equipment to the display device for color correction of the display device such as a separate PC, camera equipment, and cables, and the display device without calling a professional engineer. The administrator of the company can easily perform color correction. Hereinafter, each operation performed by the display device 1 and the server 200 will be described in detail.

Referring to FIG. 4, the display device 1 may include n number of display modules 100-1, ... 100 -n. Here, n represents an integer of 2 or more.

Each display module 100 includes a communication unit 110 that communicates with a server, a display panel 130 that displays an image, and a module controller 120 that controls the display panel 130, and the module controller 120 When a color correction command is input, the display panel 130 controls the display panel 130 to display a setting pattern including setting information of the display panel and a white image used for white balance adjustment, and the communication unit 110 transmits the display panel from the server 200 to the display panel. Upon receiving correction information for compensating for color deviation between them, setting information is adjusted based on the received correction information.

The communication unit 110 may exchange data with the server 200 through various wireless communication methods. For example, correction information for the corresponding display panel 130 may be received, and the communication unit 110 of the first display module 100-1 is a display included in the first display module 100-1. Receives correction information for the panel 130, and the communication unit 110 of the n-th display module 100-n receives correction information for the display panel 130 included in the n-th display module 100-n can do.

The module controller 120 may include at least one memory 121 in which a program for performing the above-described operation and an operation described later is stored, and at least one processor 122 for executing the stored program. In addition, at least one memory 121 may store data necessary to perform the above-described operation and the following-described operation. For example, unique information of the display module 100 may be stored in at least one memory 121.

At least one memory 121 and at least one processor 122 may be integrated on one chip or may be physically separated.

The display panel 130 may employ one of various types of panels such as an LCD panel and an LED panel. For example, when the display panel 130 employs an LCD panel, it may include a liquid crystal panel and a backlight unit including a light source. As another example, when the display panel 130 employs an LED panel, an LED light source may be provided in each of a plurality of pixels constituting the display panel 130.

The module controller 120 included in the plurality of display modules 100-1, ..., 100-n may each perform the above-described operation to adjust setting information of the display panel 130 that it controls, When color correction is performed in this manner, color deviation between the display panels 130 included in the plurality of display modules 100-1, ..., 100-n may be compensated.

As mentioned above, for specific explanation, the display device 1 having n=4 and arranged in a 2x2 matrix will be described as an example.

5 is a diagram illustrating an example of an image displayed on a display device according to an exemplary embodiment for color correction, and FIG. 6 is a diagram illustrating an example of information included in a setting pattern displayed on the display device according to an exemplary embodiment. .

When the color correction mode of the display device 1 is activated, the plurality of display modules 100-1, 100-2, 100-3 and 100-4 each includes a setting pattern ( P1, P2, P3, P4) and a white image (I _W ) used for white balance adjustment can be displayed. The white image I _W is an image in which a plurality of pixels constituting the display panel 130 display a white color.

The color correction mode of the display device 1 may be activated by input of a color correction command, and the color correction command may be input from a user through an input device of the display device 1 such as a remote controller.

The setting information of the display panel 130 may include a setting parameter related to color or brightness and a parameter value thereof, for example, at least one of an RGB gain value, an RGB offset value, and a brightness value of a light source. It can contain one.

In addition, the setting pattern may further include unique information of the corresponding display module 100. For example, the unique information of the display module 100 may include at least one of identification information of the display module 100, an IP address, a location in the display device 1, and whether or not a video wall mode is set. have.

The module controller 120 generates a setting pattern including setting information of the display panel 130 described above, or including setting information of the display panel 130 and unique information of the display module 100, and the generated setting pattern The display panel 130 may be controlled to display.

The setting pattern may be any one capable of displaying various information according to certain rules such as a QR code and a barcode, and the display device 1 according to an exemplary embodiment does not place any limitation on the type of the displayed setting pattern.

Each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 may generate a setting pattern according to the above-described method. For example, in the second setting pattern P2 generated by the module controller 120 of the second display module 100-2, as shown in FIG. 6, identification information of the second display module 100-2 , IP address, a display including unique information of the second display module 100-2 including whether or not the video wall mode is set and a location in the display device 1, a gain value of each RGB, and a brightness value of a light source It may include setting information of the panel 130. In the example of FIG. 6, the brightness value of the light source is a relative value selected from 0 to 100, and the brightness when the light source is turned off is set to 0, and the brightness when the brightness of the light source is maximized is set to 100.

Similarly, the module controller 120 of the first display module 100-1 includes identification information of the first display module 100-1, an IP address, whether the video wall mode is set, and a location within the display device 1 Generating the first setting pattern P1 including the unique information of the first display module 100-1 including the setting information for the display panel 130 including the gain value of each RGB and the brightness value of the light source Then, the display panel 130 of the first display module 100-1 may be controlled to display the generated first setting pattern P1.

In addition, the module controller 120 of the third display module 100-3 includes identification information of the third display module 100-3, an IP address, whether or not a video wall mode is set, and a location within the display device 1. Generating a third setting pattern P3 including setting information for the display panel 130 including unique information of the third display module 100-3 including RGB gain values and brightness values of light sources Then, the display panel 130 may be controlled to display the generated third setting pattern P3.

In addition, the module controller 120 of the fourth display module 100-4 includes identification information of the fourth display module 100-4, an IP address, whether the video wall mode is set, and a location within the display device 1. Generating a fourth setting pattern P4 including setting information for the display panel 130 including unique information of the fourth display module 100-4 including a gain value of each RGB and a brightness value of a light source Then, the display panel 130 may be controlled to display the generated fourth setting pattern P4.

_{As described above, the white image I W} and the setting patterns P1, P2, P3 are included in the plurality of display modules 100-1, 100-2, 100-3, and 100-4 included in the display device 1. When, P4) is displayed, as shown in FIG. 7, the user can take a picture of the display device 1 using a camera mounted on the mobile device 300. Here, the user may be an administrator of the display device 1 or a professional engineer. The mobile device 300 may be a device equipped with a camera, such as a smartphone, a tablet PC, or a PDA, and performing wireless communication with the server 200.

_{The image I D} of the display device captured by the mobile device 300 may be transmitted to the server 200.

As shown in FIG. 7, the mobile device 300 may _{transmit only the image I D} of the display device, but as shown in FIG. 8, the mobile device 300 may transmit a plurality of setting patterns P1 and P2. , P3, P4) can be recognized, and the setting information and unique information included in a plurality of setting patterns (P1, P2, P3, P4) can be transmitted to the server 200 together with _{the image (I D) of the display device.} Do. In this case, a QR code or barcode recognition function mounted on the mobile device 300 may be used.

On the other hand, it is also possible that the mobile device 300 to analyze the image (I _D) of the display device, and transmits the information about the image (I _D) of the display device to the server 200. The information on the image of the display device may include at least one of a color coordinate value and a luminance value of _{the image I D of the display device.} In an exemplary embodiment to be described later, for convenience of description, information about an image of a display device will be referred to as image information. Details will be described in an embodiment of the server 200.

9 is a control block diagram of a server according to an embodiment.

9, the server 200 according to an embodiment is a communication unit receives information, that is, image information on the image (I _D) of the image (I _D) or a display device of the display device from the mobile device 300 A plurality of display modules 100 based on the image 210 and the image I _D or image information of the display device and the setting information of each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. -1, 100-2, 100-3, 100-4), a control unit 220 that generates correction information for compensating for color deviation, and controls the communication unit 110 to transmit the correction information to the display device 1 ).

The communication unit 210 may exchange data with the mobile device 300 and the display device 1 by employing one of various wireless communication methods. The communication method used to exchange data with the mobile device 300 and the communication method used to exchange data with the display device 1 may be the same or different.

The controller 220 includes at least one memory 221 in which a program for performing the above-described operation and an operation described later is stored, and at least one processor 222 for executing the stored program. In addition, data necessary for performing the above-described operation and the following-described operation may be stored non-temporarily or temporarily in the at least one memory 121.

When the pattern recognition is not performed in the mobile device 300 as illustrated in FIG. 7 described above, the controller 220 of the server 200 receives from the image I _{D of the display device received from the mobile device 300.} Recognizing a plurality of setting patterns P1, P2, P3, P4 respectively corresponding to the plurality of display modules 100-1, 100-2, 100-3, and 100-4, and the recognized plurality of setting patterns P1 , P2, P3, P4), setting information and unique information for each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 may be obtained.

Alternatively, when pattern recognition is performed by the mobile device 300 as illustrated in FIG. 8 described above, the mobile device 300 may transmit setting information and unique information acquired through pattern recognition to the server 200. . The control unit 220 of the server 200 uses the setting information of each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 received from the mobile device 300 to generate correction information. I can.

FIG. 10 is a table showing an example of image information used by a server to generate correction information according to an embodiment, and FIG. 11 is a table showing an image of a display device received by the server according to an embodiment. It is a drawing.

As described above, the plurality of display modules 100-1, 100-2, 100-3, and 100-4 included in the display device 1 each display _{a white image I W for white balance adjustment.} I can. _{The image I D} of the display device captured by the mobile device 300 may _{include a white image I W} displayed on each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. _{In addition, the white image included in the image I D} of the display device may be viewed as a white image displayed to the viewer.

_{Accordingly, information about the image I D} of the display device _{, for example, the color coordinate value and the luminance value of the image I D} of the display device as shown in FIG. 10 are the color coordinate values and luminance values of the white image displayed to the viewer. It can be seen as representing a value. In the example of FIG. 10, CIE xy color coordinates were used.

When the communication unit 210 receives the image I _D of the display device from the mobile device 300, the control unit 220 _{analyzes the image I D} of the display device to analyze information about the image of the display device, that is, color coordinates. Value and luminance value can be obtained. Here, the color coordinate value and the luminance value will be referred to as an image information value set.

In addition, the controller 220 may obtain a plurality of image information value sets corresponding to the plurality of display modules 100-1, 100-2, 100-3, and 100-4, respectively.

Specifically, as shown in FIG. 11, a boundary B between the plurality of display modules 100-1, 100-2, 100-3, and 100-4 is displayed on _{the image I D of the display device.} I can. _{The controller 220 recognizes this boundary from the image I D} of the display device _and includes a first area I _D -1 including a white image I W displayed by the first display module 100-1, a second display module 100-2 is displayed, a second region that contains a white image (I _W) _(D I -2), a third display module (100-3) is a white image (I _W) displayed The included third area I _D -3 and the fourth area I _D _{-4 including the white image I W} displayed by the fourth display module 100-4 may be distinguished, respectively.

_{The controller 220 analyzes the image I D} of the display device to obtain a set of image information values for each of the plurality of regions I _D -1, I _D -2, I _D -3, and I _{D -4.} I can. The image information value set for the first region I _D -1 is an image information value set corresponding to the first display module 100-1, and the image information value set for the second region I _D -2 is The image information value set corresponding to the second display module 100-2, and the image information value set for the third area I _D -3 is an image information value set corresponding to the third display module 100-3 And the image information value set for the fourth area I _D -4 is an image information value set corresponding to the fourth display module 100-4. Here, the set of image information values corresponding to the display module may represent a set of image information values of a white image displayed by the display module.

Alternatively, the mobile device 300 may perform the above-described analysis and transmit information about the image of the display device as illustrated in FIG. 10 to the server 200.

Characteristics of the display panel 130 even if the module controller 120 included in the plurality of display modules 100-1, 100-2, 100-3, and 100-4 outputs the same control signal to display a white image Accordingly, color coordinates of images actually displayed on the display panel 130 may be different from each other as illustrated in FIG. 10.

In addition, according to the characteristics of the display panel 130, the luminances of images that are actually displayed may be different from each other. This difference in color coordinates or luminance is referred to as color deviation.

In order to compensate for such color deviation, the controller 220 provides correction information based on information about the image of the display device and setting information of each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. Can be created. In this case, target image information such as target color coordinates and target luminance may be considered. In other words, it is possible to calculate how the current setting information should be corrected in order to match the current image information acquired by the analysis to the target image information.

The correction information may include at least one of a correction value for RGB gain, a correction value for RGB offset, and a correction value for brightness of a light source.

First, an operation in which the controller 220 generates a correction value for luminance will be described.

When the mobile device 300 transmits the image I _D of the display device or information related thereto to the server 200, the illuminance sensor value may be transmitted together. The illuminance sensor value transmitted by the mobile device 300 may be an illuminance value measured by an illuminance sensor built in the mobile device 300. Accordingly, the illuminance sensor value transmitted from the mobile device 300 may represent illuminance of a space in which the display device 1 is located.

The controller 220 may set the target luminance based on the transmitted illuminance sensor value. The controller 220 may set the target luminance in consideration of visibility of the display device 1 in a space where the display device 1 is located.

As an example, the target luminance may be set as a multiple of the illuminance sensor value, and as shown in FIG. 12, when the illuminance sensor value is 200 nit, the target luminance may be set to 400 nit, which is twice the illuminance sensor value.

The control unit 220 is based on the setting information of each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4, information about the image I _D of the display device, and a plurality of A correction value for the brightness value of each light source of each of the display modules 100-1, 100-2, 100-3, and 100-4 may be calculated. The setting information used herein may be a brightness value of a light source _{, and the information about the image I D} of the display device may be a brightness value as illustrated in FIG. 10.

That is, the control unit 220 is the first display module 100 from the current light source brightness value (setting information), the target brightness value (=400) and the image I _{D of the display device 100-1.} Based on the luminance value corresponding to -1) (the luminance value of the first region (I _D -1) = 500), a correction value (= 72) for the brightness of the light source of the first display module 100-1 is calculated. can do.

In addition, the control unit 220 includes the second display module 100 in the current light source brightness value (setting information), the target brightness value (=400), and the image I _{D of the display device.} A correction value (=61) for the brightness of the light source of the second display module 100-2 is calculated based on the luminance value corresponding to -2) (the luminance value of the second region (I _{D -2) = 425).} can do.

In addition, the control unit 220 includes the current light source brightness value (setting information) of the third display module 100-3, the target brightness value (=400), and the third display module 100 in the _{image I D of the display device.} Based on the luminance value corresponding to -3) (the luminance value of the third area (I _D -3) = 425), a correction value (=80) for the brightness of the light source of the third display module 100-3 is calculated. can do.

In addition, the control unit 220 includes the fourth display module 100 in the brightness value (setting information) of the current light source of the fourth display module 100-4, the target luminance value (=400), and the image I _{D of the display device.} Based on the luminance value corresponding to -4) (the luminance value of the fourth area (I _D -4) = 440), a correction value (=56) for the brightness of the light source of the fourth display module 100-4 is calculated. can do.

When the control unit 220 calculates a correction value for the brightness of the light source, it is also possible to use distance information from the viewers of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. To this end, the controller 220 may obtain distance information from the viewer based on _{the image I D of the display device.}

For example, when the display device 1 is positioned higher than the viewer, as shown in FIG. 13, _{the width of the display device 1 displayed on the image I D} of the display device becomes narrower as it goes upward.

Conversely, when the display device 1 is positioned lower than the viewer, as shown in FIG. 14, the width of the display device 1 displayed in the _{image I D of the display device becomes narrower downward.}

Accordingly, the distance information between the viewer and the plurality of display modules 100-1, 100-2, 100-3, and 100-4 is the upper edge E of the display device 1 shown in _{the image I D of the display device.} The ratio of the length of _U ) and the length of the lower edge (E _B _{) or the angle between the left edge (E L} ) or the right edge (E _R ) of the display device (1) and the vertical line _{shown in the image (I D) of the display device} Can be obtained based on.

When the display device 1 is positioned higher than the viewer, the display module 100-1 positioned in an upper row among the plurality of display modules 100-1, 100-2, 100-3, and 100-4. , 100-2), the distance from the viewer increases, and the viewer may look darker. Accordingly, the controller 220 may increase a correction value for the brightness of the light source of the display modules 100-1 and 100-2 located in the upper row. In this case, the amount of increase may be determined based on the obtained distance information.

When the display device 1 is positioned lower than the viewer, the display module 100-3 positioned in a lower row among the plurality of display modules 100-1, 100-2, 100-3, and 100-4. , 100-4), the distance from the viewer increases, and the viewer may look darker. Accordingly, the controller 220 may increase a correction value for the brightness of the light source of the display modules 100-3 and 100-4 located in a lower row. In this case, the amount of increase may be determined based on the obtained distance information.

As described above, the correction information may include a correction value for RGB gain. The controller 220 includes a plurality of color coordinate values, target color coordinate values, and a plurality of display modules 100-1, 100-2, 100-3, and 100-4 included in information about _{the image I D} of the display device, respectively. A correction value for the RGB gain of each of the plurality of display modules 100-1, 100-2, 100-3 and 100-4 may be calculated based on the RGB gain included in the setting information of.

The target color coordinate value may be set as a default value, may be input from a user, and the user may change the default value.

As illustrated in FIG. 16, correction information for one display module 100-2 may include a set of correction values for a plurality of setting parameters. For example, if the setting parameters include R gain, G gain, B gain, and brightness of the light source, each of the correction values for these setting parameters forms a set of correction values.

16 shows correction information for one display module 100-2, but the control unit 220 is a diagram for each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. Correction information as shown in FIG. 16 may be generated. Accordingly, the correction information generated by the controller 220 may include a plurality of sets of correction values for each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4.

Numerical values used in the embodiments described so far are merely arbitrary numbers for exemplification or understanding of a specific case, and thus embodiments of the display device 1 and the server 200 are not limited to these values.

The control unit 220 may transmit the generated correction information to the display apparatus 1 through the communication unit 210.

As described above, the unique information included in the setting pattern includes the IP address of the display module 100. Accordingly, in transmitting the correction information, correction information for the plurality of display modules 100-1, 100-2, 100-3 and 100-4 may be transmitted to each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4. For example, the communication unit 210 transmits correction information for the first display module 100-1 to the first display module 100-1, and the correction information for the second display module 100-2 is Transmitted to the second display module (100-2), and the correction information for the third display module (100-3) is transmitted to the third display module (100-3), and to the fourth display module (100-4). The correction information may be transmitted to the fourth display module 100-4.

Alternatively, the entire correction information may be transmitted to one of the plurality of display modules 100-1, 100-2, 100-3, and 100-4, and the correction information may be transmitted in a loop-out or daisy chain method.

As described above, the plurality of display modules 100-1, 100-2, 100-3 and 100-4 may adjust the setting information based on the correction information generated by the server 200. Specifically, the plurality of display modules 100-1, 100-2, 100-3, and 100-4 may each adjust the RGB gain based on the correction value for the RGB gain, and the correction value for the brightness of the light source The brightness of the light source can be adjusted on the basis.

In this way, when the plurality of display modules 100-1, 100-2, 100-3, and 100-4 adjust the setting information, the plurality of display modules 100-1, 100-2, 100-3, and 100-4 ) Color deviation between images displayed on each of them may be reduced.

Meanwhile, it is also possible to apply the above-described embodiment to the display device 1 composed of a single display module. That is, the server 200 or the mobile device 300 generates correction information for the display device 1 based on information about the image of the display device 1, target image information, and setting information of the display device 1 In addition, the display device 1 may display an image matching the target image information by adjusting at least one of an RGB gain, a brightness of a light source, and an RGB offset based on the generated correction information.

Hereinafter, a method of calibrating a display device according to an exemplary embodiment will be described. A method of calibrating a display device according to an embodiment relates to a method of calibrating the color or brightness of the display device 1 according to the above-described embodiment, and correction information for correcting the color or brightness of the display device 1 is It may be generated by the server 200 or by the mobile device 300. Therefore, it goes without saying that the contents described above with reference to FIGS. 1 to 16 may also be applied to a method of calibrating a display device according to an exemplary embodiment, even if there is no separate mention.

Referring to FIG. 17, the display device 1 may generate a setting pattern including setting information of the display module 100 (411 ). The setting information of the display module 100 may include a setting parameter related to color or brightness and a parameter value thereof, and may include, for example, at least one of an RGB gain value, an RGB offset value, and a brightness value of a light source. . In addition, the setting pattern may include not only setting information, but also unique information including at least one of identification information of the display module 100, an IP address, a location in the display device 1, and whether or not a video wall mode is set. The generation of such a setting pattern may be performed in each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4.

The display device 1 displays a setting pattern and a white image for white balance adjustment (412 ). Each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4 may display a setting pattern and a white image that they have created.

The mobile device 300 photographs the display device 1 displaying the setting pattern and the white image (421). In this case, a camera provided in the mobile device 300 may be used.

The mobile device 300 may transmit the captured image of the display device or information about the image of the display device to the server 200.

The server 200 receives an image of the display device or information about the display device from the mobile device 300 (431). When the image of the display device is received, the server 200 analyzes the image of the display device to obtain information about the image of the display device. Information about an image of the display device may include at least one of a color coordinate value and a luminance value. In this case, the server 200 may obtain a plurality of color coordinate values or a plurality of luminance values respectively corresponding to the plurality of display modules 100-1, 100-2, 100-3, and 100-4. A detailed description of this is as described above with reference to FIG. 11.

The server 200 generates correction information based on information about an image of the display device and setting information (432). Here, the setting information is information included in the setting pattern displayed on the display device 1, and the mobile device 300 may recognize the setting pattern to obtain setting information included in the setting pattern, or the server 200 By recognizing the setting pattern, setting information included in the setting pattern may be obtained.

The server 200 may calculate a correction value for the RGB gain based on the target color coordinate value, the color coordinate value included in the image information, and the RGB gain value included in the setting information. That is, it is possible to calculate how to correct the current RGB gain in order to match the color coordinate value (the color coordinate value of the image displayed to the viewer) included in the image information to the target color coordinate value.

In addition, the server 200 may calculate a correction value for the brightness value of the light source based on the target brightness value, the brightness value included in the image information, and the brightness value of the light source included in the setting information. That is, it is possible to calculate how to correct the brightness of the current light source in order to match the luminance value included in the image information (the luminance value of the image displayed to the viewer) to the target luminance value.

The correction information generated by the server 200 is correction information for each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4.

The server 200 transmits the generated correction information to the display device 1 (433).

The display device 1 may receive correction information from the server 200 (413) and adjust the setting information based on the correction information (414 ). Specifically, the plurality of display modules 100-1, 100-2, 100-3, and 100-4 may each adjust the RGB gain based on the correction value for the RGB gain, and the correction value for the brightness of the light source The brightness of the light source can be adjusted on the basis.

A method of calibrating a display device according to an exemplary embodiment may include only some of the above-described processes depending on the performing entity. For example, if the display device 1 is a subject performing the method of calibrating the display device, steps 411, 412, 413, and 414 among the above-described processes may be included in the calibration method of the display device.

Alternatively, if the server 200 performs the method of calibrating the display device, steps 431, 432, and 433 among the above-described processes may be included in the calibration method of the display device.

Meanwhile, the mobile device 300 may perform a method of calibrating the display device. Hereinafter, it will be described with reference to FIG. 18.

Referring to FIG. 18, the display apparatus 1 generates a setting pattern including setting information of the display module 100 (411 ), and displays a setting pattern and a white image for white balance adjustment (412 ). The detailed description is as described in FIG. 17.

The mobile device 300 photographs the display device 1 displaying the setting pattern and the white image (421 ), recognizes the setting pattern, and acquires setting information of each of the plurality of display modules (423 ).

In addition, the mobile device 300 analyzes the captured image of the display device to obtain information about the image of the display device (424). Information about an image of the display device may include at least one of a color coordinate value and a luminance value.

The mobile device 300 generates correction information based on information about an image of the display device and setting information (425). The correction information may include at least one of a correction value for RGB gain, a correction value for RGB offset, and a correction value for brightness of a light source.

The mobile device 300 may calculate a correction value for the RGB gain based on the target color coordinate value, the color coordinate value included in the image information, and the RGB gain value included in the setting information. That is, it is possible to calculate how to correct the current RGB gain in order to match the color coordinate value (the color coordinate value of the image displayed to the viewer) included in the image information to the target color coordinate value.

In addition, the mobile device 300 may calculate a correction value for the brightness value of the light source based on the target brightness value, the brightness value included in the image information, and the brightness value of the light source included in the setting information. That is, in order to match the luminance value included in the image information (the luminance value of the image displayed to the viewer) to the target luminance value, how to correct the brightness of the current light source can be calculated.

The correction information generated by the mobile device 300 is correction information for each of the plurality of display modules 100-1, 100-2, 100-3, and 100-4.

The mobile device 300 transmits the generated correction information to the display device 1 (426).

The display device 1 may receive correction information from the server 200 (413) and adjust the setting information based on the correction information (414 ).

That is, the processes performed by the server 200 in the embodiment of FIG. 17 are performed by the mobile device 300 in the embodiment of FIG. 18. To this end, the mobile device 300 may include a memory in which a program for performing the above-described processes is stored and a processor for executing the stored program. Such a program may be installed on the mobile device 300 by default, or a user may download a program from an external server and install it on the mobile device 300.

The recording medium according to an embodiment is a computer-readable recording medium in which a program for executing the method of FIG. 17 is recorded.

The detailed description above is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosed contents, and/or the technology or knowledge in the art. The above-described embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in the specific application fields and uses of the present invention are also possible. Therefore, the detailed description of the invention is not intended to limit the invention to the disclosed embodiment. In addition, the appended claims should be construed as including other embodiments.

Claims

A plurality of display panels;

A plurality of module controllers respectively controlling the plurality of display panels; And

Including; a communication unit that communicates with the server,

The plurality of module controllers,

When a command for color correction is input, each of the plurality of display panels is controlled to display a setting pattern including setting information of the display panel and a white image used for white balance adjustment, and the communication unit When receiving correction information for compensating for color deviation between the display panels of the display device, the setting information is adjusted based on the received correction information.
The method of claim 1,

The above setting information,

A display device including at least one of an RGB gain value, an RGB offset value, and a brightness value of a light source.
The method of claim 1,

The communication unit,

A display device including a plurality of communication units respectively corresponding to the plurality of display panels.
The method of claim 3,

The plurality of communication units,

A display device that receives correction information for each corresponding display panel.
The method of claim 4,

The plurality of module controllers,

A display device that adjusts the setting information based on correction information for a display panel each controlled by the display panel.
A communication unit configured to receive an image of a display device photographing a display device including a plurality of display modules from a mobile device or information about an image of the display device; And

Generates correction information for compensating for color deviation between the plurality of display modules based on information about the image of the display device and setting information of each of the plurality of display modules, and the communication unit transmits the correction information to the display device. Server comprising a; control unit for controlling to be transmitted to.
The method of claim 6,

Information about the image of the display device,

A server including at least one of a plurality of color coordinate values respectively corresponding to the plurality of display modules and a plurality of luminance values respectively corresponding to the plurality of display modules.
The method of claim 6,

The communication unit,

Server for receiving setting information of each of the plurality of display modules from the mobile device.
The method of claim 6,

The control unit,

When the communication unit receives the image of the display device from the mobile device, recognizes a plurality of setting patterns from the received image of the display device, and obtains setting information of each of the plurality of display modules from the plurality of setting patterns Server.
The method of claim 6,

The control unit,

When the communication unit receives the image of the display device from the mobile device, the server obtains information about the image of the display device from the received image of the display device.
The method of claim 6,

The control unit,

A server that generates correction information for each of the plurality of display modules based on information about the image of the display device, target image information, and setting information of each of the plurality of display modules.
The method of claim 7,

The above setting information,

Including at least one of an RGB gain value, an RGB offset value, and a brightness value of the light source,

The correction information,

A server including at least one of a correction value for RGB gain, a correction value for RGB offset, and a correction value for brightness of a light source.
The method of claim 12,

The control unit,

A server that calculates a correction value for the RGB gains of each of the plurality of display modules based on the plurality of color coordinate values, target color coordinate values, and RGB gain values included in the setting information.
In the correction method of a display device including a plurality of display modules,

Receiving an image of a display device photographing a display device displaying a setting pattern and a white image from a mobile device or information about an image of the display device;

Generating correction information for compensating for color deviation between the plurality of display modules based on information about the image of the display device and setting information of each of the plurality of display modules;

Transmitting the correction information to the display device.
The method of claim 14,

Information about the image of the display device,

A method of calibrating a display device comprising at least one of a plurality of color coordinate values respectively corresponding to the plurality of display modules and a plurality of luminance values respectively corresponding to the plurality of display modules.