WO2022119003A1 - Display device and method for controlling display device - Google Patents

Abstract

A display device according to embodiments may comprise a plurality of interconnected units for transmitting or receiving an image signal and a control signal to or from each other in real time. Each of the units may include: elements for amplifying an image signal, the number of the elements being identical to the number of other units directly connected thereto; and at least one connector provided on a side surface of the unit to enable the unit to transmit or receive an image signal and a control signal to or from M other interconnected units. Each of the units may include a unit control part for scaling an image signal to be suitable for installation locations of the units on the basis of a control signal, and outputting the scaled image signal as an image.

Description

Display device and control method of display device

The present invention relates to a display apparatus and a control method thereof, and more particularly, to a display apparatus including at least one unit capable of displaying a screen.

Recently, the use of indoor or outdoor display devices such as advertisements, kiosks, or electronic signs is increasing. Digital signage is a display bulletin board that delivers information and advertisements by combining various IT technologies such as hardware, software, and content networks.

Digital signage is installed in public places such as airports, subway stations, hotels, hospitals, bus stops, apartment elevators, and banks, which are environments with a lot of floating population that can induce companies' marketing, advertising, training effects, and customer experiences. It consists of a format that alternately exposes multimedia advertisements consisting of , sound and video for each time period, and is attracting attention as the fourth media following TV, Internet, and mobile.

Conventional digital signage only provided limited outdoor advertisements, but recently, digital signage capable of remote control through a network has appeared, and is installed in public or commercial spaces to provide various contents.

A large display device such as a signage is most often used by connecting a plurality of units or modules. In order to install a signage display at a place desired by a consumer, it is common for a professional manpower to be input and to go through a long installation period.

Conventional signage display devices use a method in which products are connected in a daisy chain method and an installer manually assigns IDs according to the daisy chain method. If this method is followed, there are disadvantages in that it is necessary to learn how to use a software program for installation, a lot of time is required for installation, and a high cost is consumed.

The task of allocating IDs to the signage display unit units according to the prior art takes about 1 hour for a skilled person, about 3 hours for a person with software knowledge above a certain level, and 20 hours for an ordinary person. It is also usually impossible.

In addition, since the signage display device according to the prior art can transmit image signals and/or control signals only in one direction, there is a lot of inconvenience in the installation process, and there is a need to perform post-work so that complicated wiring is not visible.

In addition, since the signage display device according to the prior art can transmit an image signal and/or a control signal only in one direction, if one or two units cause a problem, the entire display device cannot display the screen. there was. In order to solve this problem, another conventional signage display apparatus includes a plurality of main controllers for applying image signals, so that even if an image signal received from one main controller is cut off, an image signal received from another main controller is provided. was used to transmit the image by selecting . However, when using the above method, there is a difficulty in matching the synchronization between the different image signals received from the two main controllers, and when a problem occurs in two or more units, the entire display device cannot display the screen. There was a problem.

In order to achieve the above object, the display apparatus according to embodiments of the present invention may include a plurality of interconnected units that transmit and receive an image signal and a control signal to each other in real time.

The unit included in the display device according to the embodiments may include an element for amplifying an image signal as many as the number of N other units directly connected to the unit, and at least one or more M other interconnected units are provided on the side of the unit. It may include a connector for transmitting and receiving video signals and control signals to and from the unit. In addition, it may include a unit sensing unit for detecting the installation positions of the M different interconnected units, and a unit control unit that scales the image signal to fit the installation position of the units based on the control signal and outputs the image as an image.

One of the plurality of interconnected units included in the display apparatus according to the embodiments may be a master unit. In addition, the master unit may receive an image signal from the main control unit included in the display device in real time and transmit it to other interconnected units in real time.

A unit directly or indirectly interconnected with the master unit of the display apparatus according to the embodiments may be assigned an ID including location information. The ID may be assigned based on an (x,y) coordinate system indicating a first direction and a second direction position. The control signal may include IDs for all of the plurality of interconnected units included in the display device.

The display apparatus according to the embodiments includes at least one of a second unit to a fifth unit directly connected to the first unit, and the first unit control unit included in the first unit is an image received from another unit directly connected to the first unit. One of the signals may be selected, and the selected image signal may be scaled and output as an image. Also, one of the second to fifth units may be a master unit.

In addition, the unit detection unit included in the units may detect whether the received image signal is in error. When an error exists in the selected image signal, the first unit controller may reselect one of the image signals other than the selected image signal, scale the reselected image signal, and output it as an image.

In addition, when the connection between the unit providing the selected image signal and the first unit is cut off, the first unit controller reselects one of the image signals other than the selected image information, scales the reselected image signal, and outputs the image. can do.

The elements included in the display apparatus according to the embodiments may amplify the image signal by the number of at least one other unit directly connected to the unit. In addition, the amplified video signal may be transmitted to at least one other directly connected unit, respectively.

The unit control unit included in the plurality of interconnected units included in the display apparatus according to the embodiments may generate an image transmission path through which an image signal received from the main control unit in real time may be transmitted to all units. In addition, when the master board is replaced with another unit, the unit control unit included in the plurality of interconnected units included in the display device may regenerate the image transmission path.

The device included in the display device according to the embodiments may be a field-programmable gate array (FPGA).

A method of controlling a display apparatus according to embodiments includes allocating a unit that receives an image signal directly from a main control unit as a master unit, an ID value corresponding to a first axis to units connected in a first direction from the master unit. The steps of assigning x, assigning y, which is an ID value corresponding to the second axis, to units connected in the second direction from the master unit, and automatically identifying location information of each unit based on the assigned ID may be included, and through this process, an ID in the form of (x,y) indicating location information can be assigned to each unit.

In addition, the control method of the display device according to the embodiments, based on the location information of each unit, further comprising the step of generating an image transmission path through which the master unit can transmit the image to the units included in the display device may include

A method of controlling a display apparatus according to embodiments may be a method of controlling a display apparatus including a first unit and at least two or more of a second unit to a fifth unit directly connected to the first unit, respectively. This is a step in which the first unit control unit included in the first unit selects one of the second image signals to the fifth image signals received from the second unit to the fifth unit, respectively, detecting the first unit included in the first unit additionally determining whether an error exists in the selected video signal, and if there is no error in the selected video signal, the first unit controller scales the selected video signal to output an image suitable for the position of the first unit can do.

A method of controlling a display apparatus according to embodiments may include, when an error exists in a selected image signal, the first unit controller selecting a video signal other than the selected image signal from among the second image signals to the fifth image signals The method may further include outputting, by the first unit control unit, an image suitable for the position of the first unit by scaling another image signal.

The present invention provides a display device including at least one unit capable of transmitting and receiving an image signal and a control signal in real time toward four sides.

By utilizing the display apparatus according to the embodiments, the installation process of the display apparatus having a large screen or the signage display apparatus may be simplified. This saves installation time and cost. After the physical installation of the display device is completed, even an unskilled person can directly complete the software setting of the signage display.

In addition, if the display apparatus according to the embodiments is used, even if an error exists in an image signal transmitted/received in real time between units included in the display apparatus or a unit having a poor signal transmission/reception function exists, an image may be displayed without interruption.

1 is a flowchart illustrating an installation process of a signage display apparatus according to the prior art and an installation process of a display apparatus according to embodiments.

2 is a diagram illustrating a structure of a unit included in a display apparatus according to embodiments.

3 is a diagram illustrating a method of allocating IDs of units included in a display apparatus according to embodiments.

4 is a view for explaining a problem with a display device according to the prior art.

FIG. 5 is a diagram for describing a method of generating, by a display apparatus, an image transmission path between units, according to embodiments.

6 is a flowchart illustrating a process in which a display apparatus assigns an ID to each unit and outputs an image according to embodiments.

7 is a flowchart illustrating a method of selecting another image signal when a unit included in the display apparatus detects an error in a received image signal according to embodiments.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that the object of the present invention may be specifically understood and realized.

In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intentions or customs of users and operators.

Meanwhile, in the present invention, terms such as 'first', 'and/or' 'second' may be used to describe various components, but the components are not limited to the above terms. The above terms are only used for the purpose of distinguishing one component from other components. For example, within the scope not departing from the scope of rights according to the concept of the present invention, the first component may be named as the second component, similarly the second component may also be named as the first component.

These terms should be defined and understood based on the content throughout this specification.

A signage display refers to a display installed in a public or commercial space. It is widely used mainly for advertisements, and is often seen in places with a lot of floating population such as subway stations and bus stops. Such a display device is generally configured such that a plurality of units are connected to each other, and each unit outputs an image suitable for its location so that the set of the entire unit operates as one large display.

Therefore, it is necessary to set the positions of the units so that the units can output images suitable for their respective positions. The signage display apparatus according to the prior art uses a method in which units are unidirectionally connected in a daisy chain method, and an installer manually assigns an ID including location information of the units in accordance with the daisy chain. If this method is followed, there is a problem that time may be consumed excessively unless a person is skilled in using the installation software.

Hereinafter, problems of the method for assigning IDs to units included in the display device 1 according to the prior art will be looked at by using FIGS. 1 to 3 , and an Auto Positioning Function (APF) function of the display device 1 according to embodiments. Find out how to implement it.

Figure 1 (a) is a description of the installation method of the signage display device according to the prior art. According to the prior art, after physically installing the display device, a display device operating program is installed in a PC connected to the display device 1 . After that, it was possible to display the image only when the IP of the PC was set, the PC and the main control unit were connected, the IP was set in the main control unit, and the installer set the LAYOUT by accessing the operating program.

However, in the case of executing the APF function according to the embodiments, it is possible to display an image immediately by executing the APF function after the physical installation of the display device is completed. Therefore, compared to the installation method according to the prior art, it is possible to have the effect of saving the installation time and cost of the display device.

2 illustrates a structure of a unit 1000 capable of implementing functions of a display apparatus according to embodiments. Each unit 1000 may transmit/receive an image signal and a control signal to/from other units 1000 that are directly connected or indirectly connected in real time. The direct connection refers to a state in which each unit 1000 is directly connected to each other through the connector 200 included, and the indirect connection refers to a state in which a specific unit 1000 is connected to another unit 1000 through one or more units 1000 . ) and the state in which signals can be transmitted and received.

For example, when the first unit and the second unit are directly connected, the second unit and the third unit are directly connected, and the third unit and the fourth unit are directly connected, the first unit and the third unit The units are indirectly connected to each other, and it can be seen that the first unit and the fourth unit are also indirectly connected to each other.

In addition, interconnection includes both direct connection and indirect connection, and may refer to a connection state in which one unit 1000 can transmit and receive video signals and/or control signals to and from another unit 1000 .

The device 300 capable of amplifying an image signal as many as the number of directly connected N other units 1000 may be included in the unit 1000 according to the embodiments. The device 300 may be a field-programmable gate array (FPGA).

The side of the unit 1000 according to the embodiments may include a connector 200 for transmitting/receiving an image signal and a control signal to/from the M other interconnected units 1000 . That is, by coupling the connector 200 provided on one side of the first unit and the connector 200 provided on one side of the second unit, the first unit and the second unit may be directly connected.

A unit sensing unit capable of detecting installation positions of other interconnected units 1000 may be provided inside each unit 1000 according to embodiments. In addition, the unit 1000 may include a unit control unit that scales the image signal to fit the installation positions of all units 1000 based on the control signal including the position information and outputs the image as an image.

Using the prior art, it was possible to encode or scale an image stored in a memory or the like to output an image suitable for the location of each unit. However, the display apparatus 1 according to the embodiments may exchange image signals and/or control signals with each other in real time while the interconnected units 1000 display images.

In addition, unlike the prior art, the unit 1000 according to the embodiments receives, in real time, a high-definition image signal input from the outside through a wired communication signal and/or a wireless communication signal or a DVI, HDMI cable, etc. in real time. It is possible to scale appropriately to (1000).

The unit 1000 according to the embodiments may amplify or copy one image signal as much as the number of other directly connected units 1000 by using the device 300 such as an FPGA. The unit controller can output an image to be displayed by each unit 1000 by immediately scaling the image signal received from the other unit 1000 in real time.

That is, the display apparatus 1 according to the embodiments displays an image suitable for the position and size of each unit 1000 by scaling a high-quality image signal by an external input in real time, not the image included in the memory. can do.

3 is a diagram for describing an APF implementation method for automatically allocating IDs including location information to units 1000 included in the display apparatus 1 according to embodiments.

The display apparatus 1 according to embodiments may include a main controller 2000 , and the main controller 2000 may transmit an image signal to the units 1000 . The unit 1000 directly connected to the main control unit 2000 may be regarded as a master unit. The master unit may receive an image signal from the main controller 2000 in real time and transmit it to other interconnected units 1000 in real time.

In addition, the unit 1000 interconnected with the master unit may be given an ID including its own location information. The ID may be assigned based on an (x,y) coordinate system that may indicate positions of the first direction D1 and the second direction D2 . In this case, the first direction D1 may be the x-axis direction with the master unit as the origin, and the second direction D2 may be the y-axis direction with the master unit as the origin. The control signal includes IDs for all of the plurality of interconnected units 1000 included in the display device 1 , and the units 1000 included in the display device 1 transmit and receive control signals to and from each other in real time. The position and the positions of other units 1000 may be determined.

Specifically, referring to FIG. 3A , the first unit 1000 connected to the main controller 2000 becomes a master unit, and the ID may be (0,0). For the units 1000 interconnected with the master unit, each time the units 1000 are directly connected and/or indirectly connected one by one in the first direction D1, an ID corresponding to (x+1,y) is provided in the first direction ( For each unit 1000 directly connected and/or indirectly connected one by one in the opposite direction to D1), an ID corresponding to (x-1,y) is a unit directly connected and/or indirectly connected one by one in the second direction D2 Whenever (1000), the ID corresponding to (x,y+1) is (x,y-1) whenever the unit 1000 is directly connected and/or indirectly connected one by one in the direction opposite to the second direction D2 ) may be automatically assigned.

In addition, each of the units 1000 may check in real time whether a New ID for the added unit 1000 exists, in preparation for a case where the new unit 1000 is additionally connected. The unit control unit included in each unit 1000 may output an image suitable for the position of each unit 1000 by scaling the image signal based on all IDs.

Specifically, referring to FIG. 3B , the second unit 1002 connected to the main controller 2000 may be assigned an ID (0,0) corresponding to the master unit. Since the first unit 1001 is directly connected in the first direction D1, it is given an ID (1,0), and the third unit 1003 is connected in the second direction ( Since it is directly connected in the opposite direction of D2), ID (1, -1) is given, and the fourth unit 1004 is directly connected in the first direction D1 in relation to the first unit 1001, so it has an ID (2,0) is given, and the fifth unit 1005 is directly connected in the second direction D2 in relation to the first unit 1001, so it is given an ID (1,1), and the seventh unit Since 1007 is directly connected in the second direction D2 in the relationship with the fifth unit 1005, ID (1,2) is given, and the sixth unit 1006 is the seventh unit 1007 and Since they are directly connected in the first direction D1 in the relationship of , ID(2,2) may be assigned. Since the tenth unit 1010 is directly connected in the second direction D2 in relation to the second unit 1002 , it is given an ID (0,1), and the eighth unit 1008 is the tenth unit 1010 ), since it is directly connected in the second direction D2, ID (0,2) is given, and the ninth unit 1009 is connected to the first direction D1 in the relationship with the eighth unit 1008. Since it is directly connected in the opposite direction, an ID (-1,2) can be assigned. Since the eleventh unit 1011 is directly connected in a direction opposite to the first direction D1 in relation to the second unit 1002 , ID (-1,0) may be assigned.

According to embodiments, the interconnected units 1000 transmit and receive video signals and control signals in real time in up to four directions, respectively. Therefore, the first unit control unit included in the first unit 1001 of FIG. 3B selects one of the image signals received from the second unit 1002 to the fifth unit 1005, scales it, and outputs it. can At this time, when the unit detection unit included in the first unit 1001 detects that there is an error in the selected image signal, the first unit control unit included in the first unit 1001 detects one of the image signals other than the selected image signal. can be re-selected. The first unit control unit may scale the reselected image signal and output it as an image.

In addition, the first unit control unit included in the first unit 1001 is an image received from another unit 1000 when the connection between the other unit 1000 providing the selected image signal and the first unit 1001 is cut off. One of the signals may be reselected, and the reselected image signal may be scaled and output as an image.

The device 300 included in the units 1000 may amplify or copy the selected image signal in real time as much as the number of directly connected units 1000 and transmit the amplified or copied image signal to other directly connected units 1000 in real time.

For example, since the tenth unit 1010 is directly connected to the second unit 1002, the fifth unit 1005, and the eighth unit 1008, it selects one of the video signals it receives and amplifies it three times. After doing this, the second unit 1002 , the fifth unit 1005 , and the eighth unit 1008 may be transmitted again. Also, for example, since the first unit 1001 is directly connected to the second unit 1002 , the third unit 1003 , the fourth unit 1004 , and the fifth unit 1005 , it receives video signals After selecting one and amplifying it 4 times, it can be transmitted again to each of the second unit 1002 , the third unit 1003 , the fourth unit 1004 , and the fifth unit 1005 .

Hereinafter, a method of generating a path through which the display device 1 according to embodiments transmits an image from the master unit to all other units 1000 will be described with reference to FIGS. 4 to 5 .

4 is a view for explaining a problem with the signage display device 1 according to the prior art.

The first unit 3001 to the eighteenth unit 3018 to be described later in the description of FIG. 4 are units included in the display device 1 according to the prior art, and have a different configuration from the units 1000 described in the present invention. should be understood as

Since the display device 1 according to the prior art has no choice but to transmit a signal in one direction as shown in FIG. 4(a) , when a unit having a transmission/reception problem occurs, all units existing at a position after the problem unit from the main control unit 2000 I had a problem with this not working. Therefore, two main controllers 2000 are provided to duplicate the image signals, and even if there is a problem in one image signal, another image signal is selected and the image is stably transmitted.

According to the prior art, a first master unit directly connected to the first main control unit 2000 is set, and a second master unit directly connected to the second main control unit 2000 is set. The master unit is the closest interconnected unit from one main controller 2000 and the farthest interconnected unit from the other main controller 2000 .

Therefore, referring to FIG. 4A , the first unit 3001 connected to the first main control unit 2000 becomes the master unit, and the first unit 3001 is connected to each other farthest from the second main control unit 2000 . become a unit In addition, the eighteenth unit 3018 connected to the second main controller 2000 becomes the master unit, and the eighteenth unit 3018 becomes the unit connected to each other farthest from the first main controller 2000 .

In the case of using such a prior art, a plurality of main controllers 2000 for transmitting images may exist, and thus a problem of not being synchronized between the image signals transmitted by each of the main controllers 2000 may occur. In addition, when a problem occurs in only one fourth unit 3004 as shown in FIG. 4(b) , the display device 1 operates normally, but as shown in FIG. 4(c), the fourth unit 3004 and the tenth unit 3010 ) When a problem occurs in the two units, there is a problem that the fifth unit 3005 to the ninth unit 3009 connected in the middle does not work.

FIG. 5( a ) shows that the first unit 1001 to the ninth unit 1009 are interconnected to transmit/receive an image signal and a control signal in real time. At this time, since the main control unit 2000 is directly connected to the first unit 1001 , the master unit becomes the first unit 1001 .

FIG. 5B illustrates an embodiment in which the master unit generates an image transmission path through which the image signal received from the main controller 2000 can be transmitted to all other interconnected units 1000 . Each of the units 1000 included in the display device 1 continues to exchange image signals and control signals with other directly connected units 1000, but the image transmission path shown in FIG. ) can be understood as a path for selecting which of the video signals received from the other units 1000 directly connected to each other.

Specifically, the first unit 1001 as the master unit receives the image signal from the main control unit 2000 . The second unit 1002 selects the video signal received from the first unit 1001 among the three units 1000 directly connected, and selects the second unit among the two units 1000 to which the third unit 1003 is directly connected. 2 Selects the video signal received from the unit 1002, selects the video signal received from the third unit 1003 among the three units 1000 to which the fourth unit 1004 is directly connected, the fifth unit ( The video signal received from the fourth unit 1004 is selected among the four units 1000 to which 1005 is directly connected, and the fifth unit 1005 among the three units 1000 to which the sixth unit 1006 is directly connected. ), selects the video signal received from the sixth unit 1006 among the two units 1000 to which the seventh unit 1007 is directly connected, and the eighth unit 1008 directly The video signal received from the seventh unit 1007 among the three connected units 1000 is selected, and the ninth unit 1009 received from the eighth unit 1008 among the two directly connected units 1000 A result of selecting an image signal may be an image transmission path indicated by an arrow in FIG. 5(b) .

FIG. 5( c ) shows positions to which the main control unit 2000 can be connected differently while the display apparatus 1 is operating according to the embodiment of FIG. 5( b ). The units 1000 may include connectors 200 on each of the four sides. Accordingly, the main control unit 2000 may be connected to any of the connectors 200 included in the units 1000 . As the unit 1000 to which the main control unit 2000 is connected changes, the master unit may be replaced.

FIG. 5( d ) shows a display device 1 includes when the main controller 2000 is directly connected to another unit 1000 in the situations of FIGS. 5 ( b ) and 5 ( c ) according to embodiments. It shows that the image transmission path of the units 1000 is regenerated. In this embodiment, the main control unit 2000 is directly connected to the first unit 1001 and is disconnected from the direct connection to the third unit (1003). Accordingly, the third unit 1003 is set as the master unit. FIG. 5(d) shows that in relation to the third unit 1003, which is a new master unit, a new image transmission path is regenerated so that all other units 1000 included in the display device 1 can receive the image signal. Examples are shown.

Hereinafter, with reference to FIG. 6 , a method for scaling and outputting an image signal by receiving an ID to units included in the display apparatus according to embodiments will be described.

A method of controlling a display apparatus according to embodiments may be a method of assigning (x,y) type IDs indicating location information to units. This may include a step (S1010) of assigning an ID to a unit connected to the main control unit as a master unit. In this case, the ID of the master unit may have any value, and the ID of the master unit may be (0,0).

The control method of the display device according to the embodiments may include assigning IDs to units directly connected to the master unit according to the ID of the master unit (S1020), and to all other units indirectly connected to the master unit. It may include the step of assigning an ID (S1030). In addition, the step (S1040) of checking whether there is a unit to which a new ID has been assigned, the step of searching for all IDs assigned to each unit and transmitting it to the unit control unit (S1050), the steps of all units based on the received ID A step of determining the location (S1060), a step of scaling the video signal so that the unit controller included in each unit is suitable for its location based on the location of the identified units (S1071), based on the location of the identified units As such, each unit may include a step of generating an image transmission path through which an image signal can be transmitted to all other units (S1072) and a step of outputting a scaled image of each unit (S1080).

In addition, the control method of the display apparatus according to the embodiments further includes the step of generating an image transmission path through which the master unit can transmit an image to all units included in the display apparatus based on the location information of each unit. may include

Hereinafter, with reference to FIG. 7 , a method in which units included in a display apparatus according to embodiments are controlled in response to an error detected in a received image signal will be described.

The control method of the display apparatus according to the embodiments includes the step of transmitting and receiving image signals in real time with all other units directly connected to each unit (S2010), wherein each unit has an error among at least one or more image signals it receives. arbitrarily selecting one that is not found (S2020), determining whether an error exists in the selected image signal by the unit detection unit (S2030), scaling the selected image signal to match the position of the unit (S2040) and It may include outputting the scaled image signal (S2050).

Specifically, according to embodiments, a method for controlling a display device including at least two of a first unit and a second unit to a fifth unit directly connected to the first unit may include a first unit controller included in the first unit. may include selecting one of the second image signals to the fifth image signals respectively received from the second unit to the fifth unit, and an error occurs in the selected image signal by the first unit detection unit included in the first unit. The method may include determining whether there is an error and outputting an image suitable for the position of the first unit by scaling the selected image signal by the first unit controller when there is no error in the selected image signal. In addition, when the first unit detection unit detects that an error exists in the selected image signal, the first unit control unit may include selecting an image signal other than the selected image signal from among the second image signal to the fifth image signal. In addition, the first unit controller may further include outputting an image suitable for the position of the first unit by scaling another image signal.

As mentioned above, the present invention is not limited to the above-described embodiment. As can be seen from the appended claims, the present invention can be modified by those skilled in the art to which the present invention pertains, and such modifications are within the scope of the present invention.

Claims (15)

1. A display device comprising a plurality of interconnected units for transmitting and receiving video signals and control signals to and from each other in real time,

   The unit is

   an element for amplifying the video signal by the number of N other units directly connected to the unit;

   at least one connector provided on a side surface of the unit to transmit/receive the video signal and the control signal with M other interconnected units;

   a unit detection unit for detecting installation positions of the M different interconnected units; and

   Based on the control signal, the unit control unit for outputting the image by scaling the image signal suitable for the installation position of the units; characterized in that it comprises a

   display device.
2. The method of claim 1,

   One of the plurality of interconnected units included in the display device is a master unit,

   The master unit is

   Receiving the image signal from the main control unit included in the display device in real time, characterized in that it is transmitted to other interconnected units in real time

   display device.
3. 3. The method of claim 2,

   The unit directly or indirectly interconnected with the master unit is given an ID including location information,

   The ID is assigned based on an (x,y) coordinate system that may indicate a first direction and a second direction location,

   wherein the control signal includes the ID for all of the plurality of interconnected units included in the display device.

   display device.
4. 3. The method of claim 2

   The display device includes at least one of a second unit to a fifth unit directly connected to the first unit,

   The first unit control unit included in the first unit,

   Selecting one of the image signals received from another unit directly connected to the first unit, scaling the selected image signal, and outputting the image as an image

   display device.
5. 5. The method of claim 4

   one of the second to fifth units is the master unit

   display device.
6. 5. The method of claim 4

   The unit detection unit detects whether there is an error in the received image signal,

   The first unit control unit

   When an error exists in the selected image signal, one of the image signals other than the selected image signal is reselected, and the reselected image signal is scaled and output as an image.

   display device.
7. 5. The method of claim 4

   When the connection between the unit providing the selected video signal and the first unit is cut off, the first unit control unit reselects one of the video signals other than the selected video signal, and scales the reselected video signal. characterized in that it is output as an image

   display device.
8. 2. The method of claim 1

   The device amplifies the video signal by the number of at least one other unit directly connected to the unit and transmits the amplified video signal to the at least one other unit directly connected to the unit.

   display device.
9. 3. The method of claim 2

   A unit control unit included in a plurality of interconnected units included in the display device generates an image transmission path through which an image signal received from the main control unit in real time can be transmitted to all units

   display device.
10. 10. The method of claim 9

    When the master board is replaced with another unit, the unit control unit included in the plurality of interconnected units included in the display device regenerates the image transmission path

    display device.
11. 2. The method of claim 1

    The device is an FPGA (Field-Programmable Gate Array), characterized in that

    display device.
12. In the control method of a display device that gives an ID of the (x,y) format representing location information to units,

    allocating a unit receiving the video signal directly from the main control unit as a master unit;

    assigning x, which is an ID value corresponding to a first axis, to units connected in a first direction from the master unit;

    assigning an ID value y corresponding to a second axis to units connected in a second direction from the master unit; and

    Comprising the step of automatically identifying the location information of each unit based on the assigned ID

    A method of controlling a display device.
13. 13. The method of claim 12

    Based on the location information of each unit, generating an image transmission path through which the master unit can transmit an image to all units included in the display device; further comprising

    A method of controlling a display device.
14. In the control method of a display device including a first unit and including at least one of a second unit to a fifth unit directly connected to the first unit, respectively,

    selecting, by the first unit control unit included in the first unit, one of the second to fifth image signals respectively received from the second to fifth units;

    determining whether an error exists in the selected image signal by a first unit detecting unit included in the first unit; and

    When there is no error in the selected video signal, the first unit controller scaling the selected video signal to output an image suitable for the position of the first unit

    A method of controlling a display device.
15. 15. The method of claim 14,

    selecting, by the first unit control unit, an image signal other than the selected image signal from among the second image signal to the fifth image signal when an error exists in the selected image signal; and

    The first unit control unit, scaling the other image signal further comprising the step of outputting an image suitable for the position of the first unit

    A method of controlling a display device.

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