WO2016129785A1

WO2016129785A1 - Display device and command transmission method thereof

Info

Publication number: WO2016129785A1
Application number: PCT/KR2015/012563
Authority: WO
Inventors: 조영규; 이장희
Original assignee: 엘지전자 주식회사
Priority date: 2015-02-09
Filing date: 2015-11-20
Publication date: 2016-08-18

Abstract

Disclosed is a device which configures a multi display system. The device which configures a multi display system according to the present invention comprises: a first interface unit which provides a connection path for connection to another device; a second interface unit which is connected to the first interface unit, a first bus, and a second bus; a processor which transmits a first command and receives a second command; a TX line which transmits the first command by connecting the processor to any one of the first bus and the second bus; an RX line which transmits the second command by connecting the processor to any one of the first bus and the second bus; a switching unit which connects the RX line to any one of the first bus and the second bus, or connects the TX line to any one of the first bus and the second bus, wherein the processor controls the switching unit so as to connect the RX line to the first bus and the TX line to the second bus, or connect the RX line to the second bus and the TX line to the first bus.

Description

Display device and its command transmission method

The present invention relates to a method of transmitting a command from a master to a slave by switching a connection of a processor, a first bus, and a second bus in a display device configuring a multi-display system.

In a multi-display system in which a plurality of display devices are connected, a control command for controlling each display device is performed by connecting a PC. In detail, the plurality of display devices may be connected to the PC by daisy chaining, or the plurality of display devices may be connected to the PC to receive a control command from the PC and perform an operation corresponding to the received control command. .

On the other hand, among the control commands transmitted to the display apparatuses, it is sometimes desirable to apply the settings set in one display apparatus to the other display apparatus as it is, such as a time synchronization command. In such a case, connection of a PC is not essential. However, even in this case, as shown in FIG. 1A, it is inconvenient to connect a PC to the multi-display system in order to synchronize the time of the display devices.

Meanwhile, there is a method of directly transmitting a control command such as a time synchronization command from a display device serving as a master to a display device serving as a slave without connecting a PC to the multi display system.

However, in order to transfer the control command directly from the master to the slave, as shown in FIG. There was an inconvenience to switch to a port.

In addition, when the master's IN port and the slave's IN port are connected, the master and the PC cannot be connected, so that the PC can not control the display devices or check the status of the display device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device in a multi-display system including a plurality of display devices. The present invention relates to a method for transmitting a command to a slave.

According to an embodiment of the present invention, an apparatus constituting a multi-display system includes a first interface unit providing a connection path for connecting to another apparatus, a first interface connected to the first interface, and a first bus and a second bus. A second interface unit, a processor for transmitting a first command and receiving a second command, a TX line for connecting the processor and 'one of the first bus and the second bus' to transmit the first command, the processor And an RX line connecting the one of the first bus and the second bus to transfer the second command, and connecting the RX line with any one of the first bus and the second bus. And a switch unit connecting the TX line to any one of the first bus and the second bus, wherein the processor is configured to connect the RX line to the first bus and the TX line to the second bus. To each connected to a switch or to control the switch unit to the RX line to the second bus, so as to respectively couple the TX line with the first bus.

On the other hand, in the command transmission method of the device constituting the multi-display system according to another embodiment of the present invention, the device, the first interface unit for providing a connection path for connecting to the other device, the first A second interface unit connected to an interface and a first bus and a second bus, a processor transmitting a first command and receiving a second command, the processor and 'one of the first bus and the second bus' A TX line for transmitting the first command, and an RX line for connecting the processor and 'any one of the first bus and the second bus' to transmit the second command, and transmitting the command of the device. The method comprises connecting the RX line to the first bus and the TX line to the second bus, and connecting the RX line and the first bus, of the TX line and the second bus. By switching the connection, on the second bus to the RX line, and a step of coupling the TX line with the first bus.

FIG. 1A illustrates a conventional method of controlling a display device constituting a multi-display system by connecting a PC to the multi-display system.

FIG. 1B is a diagram for explaining a conventional method of controlling a display device constituting a multi-display system by connecting a display device to an IN port and an IN port.

2 is a diagram illustrating a multi display system according to an exemplary embodiment.

3 is a block diagram illustrating a configuration of a display device constituting a multi display system according to an exemplary embodiment of the present invention.

4A and 4B are diagrams for explaining connection between an RX line and a TX line, and a first bus and a second bus, according to an exemplary embodiment of the present invention.

FIG. 5 is a flowchart illustrating a command transmission method of a first display apparatus in a state in which a TX line is connected to a first bus and an RX line is connected to a second bus, according to an exemplary embodiment.

FIG. 6 is a diagram for describing a method of transmitting / receiving a command with a second display device in a state in which a TX line is connected to a first bus and an RX line is connected to a second bus according to an embodiment of the present disclosure.

FIG. 7 is a flowchart illustrating a command transmission method of a display apparatus when an external device is connected to a multi display system according to an exemplary embodiment of the present disclosure.

8A to 8C are diagrams for describing a method of transmitting a command of a display apparatus when an external device is connected to a multi display system according to an exemplary embodiment of the present invention.

9A and 9B are diagrams for describing a command flow in a multi-display system connected in a daisy chain manner according to an exemplary embodiment of the present invention.

10A and 10B are diagrams for describing a method of synchronizing time of a plurality of display apparatuses constituting a multi-display system according to an exemplary embodiment.

FIG. 11 is a flowchart illustrating a method of setting a master / slave of a plurality of display devices configuring a multi display system according to an exemplary embodiment of the present invention.

12 is a diagram illustrating a process of transmitting a received user input to other display devices when a user input is received at a first display device according to an embodiment of the present disclosure.

13A to 13E are diagrams for describing a method of setting a master / slave of a plurality of display devices configuring a multi display system according to an exemplary embodiment of the present invention.

FIG. 14 is a diagram illustrating a UI screen for setting a master / slave displayed on a plurality of

display apparatuses

100, 200, 300, and 400 constituting a multi display system according to an exemplary embodiment.

15A to 15C illustrate a method of blocking a user input transmitted to a second display device according to a first user input according to an exemplary embodiment of the present invention.

FIG. 16 is a diagram illustrating a screen in which a first display device is set as a master by a user input according to an exemplary embodiment of the present invention.

17 is a diagram illustrating a UI screen displayed on a plurality of

display apparatuses

100, 200, 300, and 400 constituting a multi display system when a slave setup command is transmitted according to an exemplary embodiment of the present disclosure.

FIG. 18 is a diagram illustrating a method of setting a time synchronization between a first display device and a second, third, and fourth display device, and a method of setting a synchronization period.

19 is a block diagram of a display apparatus 1500 constituting a digital signage system when the multi-display system according to an exemplary embodiment of the present invention is a digital signage system. .

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

2 is a diagram illustrating display devices configuring a multi-display system according to an exemplary embodiment of the present invention.

The device configuring the multi display system may be a display device. In the following description, a device constituting the multi display system is assumed to be a display device. However, the present invention is not limited thereto, and the device constituting the multi display system may be any kind of device capable of transmitting a control command to a plurality of devices constituting the multi display system.

According to FIG. 2, the multi display system 10 may include a plurality of

display devices

100, 200, 300, and 400. In addition, the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system may be connected by

cables

510, 520, and 530.

An external device (not shown) may be connected to the multi display system 10, and a UART may be connected between the external device (not shown) and the first display device 100 or the plurality of

display devices

100, 200, 300, and 400. Universal asynchronous receiver / transmitter) can communicate. Here, UART communication is a serial-based communication method that directly connects a display device and a PC, and refers to a communication method that allows a PC to communicate with or transmit data with a modem or other device.

For UART communication, RS-232C can be used as a communication standard. RS-232C is one of the internationally standardized data communication standards for PCs to exchange data.

The IN and OUT interfaces of the

display apparatuses

100, 200, 300, and 400 may be RS-232C interfaces, and may be an external device (not shown) and the first display apparatus 100 or the plurality of

display apparatuses

100 and 200. , 300 and 400 may be an RS-232C cable.

Accordingly, the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system may be connected to a PC according to the RS-232C standard to receive data from the PC or to transmit data to the PC.

Specifically, RX (Receive) line for data reception and TX (Transmit) line for data transmission may be used for communication using RS-232C. As shown in FIG. 2, when a plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system 10 are connected in a daisy chain manner, a command transmitted from an external device The first display device 100, the second display device 200, and the second display device 100 are connected to each of the plurality of

display devices

100, 200, 300, and 400 and the

cables

510, 520, and 530 through RX (Receive) lines. It may be delivered to each of the third display device 300 and the fourth display device 400.

In addition, the connection of the RX line and the first bus and the connection of the TX line and the second bus, which will be described later, are switched so that the TX line is connected to the first bus and the RX line is connected to the second bus. The command generated by the first display apparatus 100 is transmitted through RX (Receive) lines included in the second, third, and

fourth display apparatuses

200, 300, and 400 and the

cables

510, 520, and 530. The second display apparatus 200 may be transferred to each of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400. A detailed operation thereof will be described later.

Meanwhile, the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system may transmit data to an external device (not shown). For example, as illustrated in FIG. 2, when a plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system 10 are connected in a daisy chain manner, a plurality of display apparatuses may be used. Commands transmitted from (100, 200, 300, 400) may be transmitted to an external device through a TX (Transmit) line included in each of the plurality of

display apparatuses

100, 200, 300, 400 and

cables

510, 520, and 530. Not shown).

In addition, the connection of the RX line and the first bus and the connection of the TX line and the second bus, which will be described later, are switched so that the TX line is connected to the first bus and the RX line is connected to the second bus. If the command is generated in each of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400, the second, third, and

fourth display apparatuses

200, 300, and 400 may be connected to each other. The first display apparatus 100 may be transferred to the first display apparatus 100 through a TX line included in the 510, 520, and 530. A detailed operation thereof will be described later.

Meanwhile, the multi display system 10 is a digital signage system, and the plurality of

display devices

100, 200, 300, and 400 included in the multi display system 10 are digital signage systems. It may be a plurality of display devices constituting the. A display device constituting a digital signage system will be described in detail with reference to FIG. 19.

Meanwhile, in the present exemplary embodiment, communication between an external device and a multi display system or a plurality of display devices configuring the multi display system is described according to the RS-232C standard. However, the present invention is not limited thereto. Specifically, the present invention can be applied to all multi display systems performing communication using a TX-RX communication line such as a UART communication method.

Meanwhile, in the present embodiment, a plurality of display devices are connected in a daisy chain manner, but the present invention is not limited thereto. Specifically, the present invention can be applied to various connection combinations of a plurality of display devices connected by a display device serving as a master and a UART communication method.

3 is a block diagram illustrating a configuration of a display apparatus constituting a multi display system according to an exemplary embodiment.

According to FIG. 3, the apparatus 100 constituting the multi-display system may include a first interface unit 110, a second interface unit 120, a processor 130, and a switch unit 140.

The second interface unit 120 may communicate with an external device or another display device. Specifically, the second interface unit 120 includes a RX (Receive) line for receiving data, and receives a command from an external device or another display device through the RX (Receive) line of the second interface unit 120. Can be. In addition, the second interface unit 120 may include a TX line for data transmission, and may transmit data to an external device or another display device through the TX line of the second interface unit 120. .

The first interface unit 110 may communicate with another display device. In detail, the first interface unit 110 may include a RX (Receive) line for receiving data, and may receive a command from another display device through the RX (Receive) line. In addition, the first interface unit 110 may include a TX (Transmit) line for data transmission, and may transmit a command to another display device through the TX (Transmit) line.

The second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may include the same configuration as the first display apparatus 100. In addition, the second display apparatus 200 and the third display apparatus 300 may have different display devices through the first interface unit and the second interface unit included in each of the second display apparatus 200 and the third display apparatus 300. Communicate with However, the fourth display apparatus 400 may only receive the command as the last display device to which the command received from the PC is transmitted and may not transmit the command to another display device. Therefore, the fourth display apparatus 400 may not include the first interface unit.

Meanwhile, in the present exemplary embodiment, the first display apparatus 100 is connected to an external device and a second display apparatus, and the second interface unit 120 of the first display apparatus 100 is an external device and the first interface unit. It is assumed that 110 is in communication with the second display apparatus 200.

The display apparatus 100 may include a first bus (not shown) connecting the first interface unit 110 and the second interface unit 120.

The first bus (not shown) may connect the first interface unit 110 and the second interface unit 120. In detail, the first bus may be connected to the RX line of the second interface unit 120 and the TX line of the first interface unit 110.

The first bus may be a bus connected to the RX line of the second interface unit 120 to transfer a command received from the external device through the second interface unit 120 to the processor 130.

In addition, the first bus is connected to the RX line of the second interface unit 120, TX line of the first interface unit 110, the first interface to receive a command received through the second interface unit 120 from an external device It may be a bus that transmits to the unit 110 to be transmitted to the second, third and

fourth display apparatuses

200, 300, and 400.

In addition, when the connection between the RX line and the first bus and the connection between the TX line and the second bus are switched, the first bus is connected to the TX line of the first interface unit 110 and generated by the processor 130. May be a bus to be transmitted to the second, third, and

fourth display apparatuses

200, 300, and 400.

The display apparatus 100 may include a second bus (not shown) connecting the first interface unit 110 and the second interface unit 120.

The second bus may connect the first interface unit 110 and the second interface unit 120. In detail, the first bus may be connected to the TX line of the second interface unit 120 and the RX line of the first interface unit 110.

The second bus is connected to the TX line of the second interface unit 120 and the RX line of the first interface unit 110 to connect the first interface from the second, third, and

fourth display devices

200, 300, and 400. It may be a bus to transmit a command received through the unit 110 to an external device (not shown) through the second interface unit 120.

In addition, the second bus may be connected to the TX line of the second interface unit 120 to allow a command generated by the processor 130 to be transmitted to an external device through the second interface unit 120.

In addition, the second bus is connected to the RX line of the first interface unit 110 and received from the second, third, and

fourth display apparatuses

200, 300, and 400 through the first interface unit 110. It may be a bus that delivers instructions to the processor 130.

Regarding the first bus and the second bus, it will be described in more detail with reference to FIG. 4.

The processor 130 may transmit a first command. In detail, the processor 130 may generate a first command and transmit the generated first command through a TX line connecting the processor 130 and 'one of the first bus and the second bus'.

In addition, the processor 130 may receive a second command. In detail, the processor 130 may receive a second command through an RX line connecting the processor 130 and 'any one of the first bus and the second bus'.

The RX line (not shown) may connect the processor 130 and the first bus to receive a command transmitted from an external device from the first bus and transmit the command to the processor 130. In addition, the RX line (not shown) may connect the processor 130 and the second bus to receive a command transmitted from the second display device from the second bus and transmit the command to the processor 130.

The TX line (not shown) may connect the processor 130 to the second bus and transmit a command generated by the processor 130 to the external device to the second bus. In addition, the TX line (not shown) may connect the processor 130 to the first bus and transmit a command generated by the processor 130 to the second display device to the first bus.

Meanwhile, the processor 130 may control the switch unit to connect the RX line to the first bus, the TX line to the second bus, or the RX line to the second bus and the TX line to the first bus, respectively. Can be.

Specifically, the processor 130 switches the connection of the RX line and the first bus, the connection of the TX line and the second bus while the RX line and the first bus are connected and the TX line and the second bus are connected. The switch unit 140 is connected such that the TX line transferring the first command generated by the processor 130 is connected to the first bus and the RX line transferring the second command received from the processor 130 is connected to the second bus. Can be controlled.

In contrast, the processor 130 switches the connection of the RX line and the second bus, the connection of the TX line and the first bus while the RX line and the second bus are connected and the TX line and the first bus are connected. The switch unit 140 is controlled such that the TX line transferring the first command generated by the processor 130 is connected to the second bus, and the RX line delivering the second command received from the processor 130 is connected to the first bus. can do.

The switch unit 140 connects the RX line with any one of the first bus and the second bus by switching the connection of the RX line and the TX line, the first bus, and the second bus under the control of the processor 130. The TX line may be connected to any one of the first bus and the second bus. On the other hand, the switch 140 may be a mux (MUX).

The display unit (not shown) may display a UI screen for controlling the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system.

4 is a diagram illustrating a connection between an RX line and a TX line and a first bus and a second bus.

4A is a diagram illustrating a state in which RX line and TX line are connected to the first bus and the second bus, that is, RX line is connected to the first bus and TX line is connected to the second bus.

Before the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus line 160 is switched, the RX line 131 is connected to the first bus 150 and The TX line 132 is connected to the second bus 160.

Meanwhile, the processor 130 may control the switch unit 140 to switch a connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160. In this case, the switch 140 may be connected to the RX line 131 to the second bus 160 and the TX line 132 to the first bus 150 under the control of the processor 130.

The state in which the connection between the RX line 131 and the TX line 132 and the first bus line 150 and the second bus 160 are switched is illustrated in FIG. 4B.

FIG. 5 is a flowchart illustrating a method of transmitting a command of a first display apparatus in a state in which a connection between an RX line 131 and a TX line 132 is connected to the first bus 150 and the second bus 160. to be.

According to FIG. 5, in the method of transmitting a command of a first display device configuring a multi-display system, connecting the RX line to the first bus and the TX line to the second bus (S510), the first bus and the RX line Switching the connection and the connection between the second bus and the TX line, connecting the RX line to the second bus and the TX line to the first bus (S530), and connecting the first command to the second bus using the first bus. The method may include transmitting to the display device and receiving a command transmitted from the second display device through the second bus (S550).

This will be described in detail with reference to FIG. 6.

FIG. 6 is a diagram illustrating a method of transmitting and receiving a command with a second display apparatus when a connection between a processor, a first bus, and a second bus is switched so that an RX line is connected to a second bus and a TX line is connected to a first bus. to be.

According to FIG. 6, with the RX line 131 connected to the first bus 150 and the TX line 132 connected to the second bus 160, the RX line 131 and the TX line 132 and the first bus are connected. When the connection between the bus 150 and the second bus 160 is switched, the RX line 131 may be connected to the second bus 160, and the TX line 132 may be connected to the first bus 150.

In addition, the processor 130 may transmit a first command to the second display apparatus 200 using the first bus 150. In detail, the processor 130 generates a first command and transmits the generated first command to the TX line 132, the first bus 150 and the first bus connected to the TX line 132 of the processor 130. The transmission may be transmitted to the second display apparatus 200 through the TX line 112 of the first interface unit 110 connected to the 150.

The first command generated and transmitted by the processor 130 while the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150 includes the second, third, and the like. The control command may be any kind of control command capable of controlling the states of the

fourth display apparatuses

200, 300, and 400. For example, the first command may include the second, third and

fourth display apparatuses

200, 300, 400, image, sound, ON / OFF, mode, etc. of the second, third, and

fourth display apparatuses

200, 300, 400. It may be a control command that can control at least one of the functions implemented in (300, 400).

In addition, the first command generated and transmitted by the processor 130 while the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150 may include: It may be a synchronization command for synchronizing the third and

fourth display apparatuses

200, 300, and 400 with the first display apparatus 100.

For example, the first command may be a command for synchronizing setting times of the second, third, and

fourth display apparatuses

200, 300, and 400 with setting times of the first display apparatus 100. Also, the first command may be a command for synchronizing the content playback start time of the first display device with the content playback start time of the second, third, and

fourth display devices

200, 300, and 400.

In addition, the first command generated and transmitted by the processor 130 while the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150 may include: Setting values of the third and

fourth display apparatuses

200, 300, and 400, for example, contrast, brightness, color, sharpness, color density, color temperature, white balance, horizontal / vertical position, horizontal size, volume, language, It may be a command for synchronizing a key, a screen effect, a mode, and the like with the first display apparatus 100.

Meanwhile, the first display apparatus 100 according to another exemplary embodiment may further include an input unit (not shown) that receives a user input. The first command may be a command corresponding to a user input received through an input unit (not shown).

In detail, when a user input is received through an input unit (not shown), the processor 130 generates a first command corresponding to the received user input and transmits the generated first command to the second display apparatus 200. Can be.

For example, when a user input for setting “brightness” of the display unit to a specific value is received through an input unit (not shown), the processor 130 generates a first command to set “brightness” of the display unit to a specific value. 2 may be transmitted to the display apparatus 200.

As another example, the time of the first display apparatus 100, the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may be set to a specific time through an input unit (not shown). When the user input is received, the processor 130 sets the time of the first display apparatus 100 to a specific time received, and the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus. The first command to set the time of the 400 to a specific time may be generated and transmitted to the second display apparatus 200.

As another example, the user input to set the time of the first display apparatus 100 to a specific time through an input unit (not shown) and to periodically synchronize the times of the plurality of display apparatuses constituting the multi-display system 10. When the command is received, the processor 130 periodically generates a first command to set the time of the first display apparatus 100 to a specific time received and to synchronize the setting time with the time of the first display apparatus 100. To the second display apparatus 200.

Meanwhile, the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 is switched so that the RX line 131 of the processor 130 is connected to the second bus 160. When the TX line 132 of the processor 130 is connected to the first bus 150, the processor 130 may receive a second command through the second bus 160. In this case, the second command received by the processor 130 with the RX line 131 connected to the second bus 160 and the TX line 132 connected to the first bus 150 may include a second display device ( 200 may be a command transmitted.

In detail, when the second display apparatus 200 transmits a command, the processor 130 may control the first through the RX line 121, the second bus 160, and the RX line 131 of the second interface unit 120. 2 The command transmitted from the display apparatus 200 may be received. Here, the command transmitted from the second display apparatus 100 may be generated by the third display apparatus 300 and the fourth display apparatus 400 as well as the command generated by the second display apparatus 200. It may include a command transmitted through the (200).

The command transmitted from the second display apparatus 200 may be an ACK command that is a response to the first command received from the second display apparatus. Specifically, as described above, when the command is transmitted from the first display apparatus 100 to the second, third, and

fourth display apparatuses

200, 300, and 400, the second, third, and fourth display apparatuses. The 200, 300, and 400 may generate and transmit ACK commands for the received commands, respectively, and the processor 100 of the first display apparatus may include the second, third, and

fourth display apparatuses

200, 300, and 400. The ACK command transmitted from may be received from the second display apparatus 200. Therefore, the first display apparatus 100 may check whether the second, third, and

fourth display apparatuses

200, 300, and 400 for the first command transmitted from the first display apparatus 100 are received.

In addition, the command transmitted from the second display apparatus 200 may be state information of each of the second, third, and

fourth display apparatuses

200, 300, and 400. For example, the command transmitted from the second display apparatus 200 may include contrast, brightness, color, sharpness, color density, color temperature, and white balance of each of the second, third, and

fourth display apparatuses

200, 300, and 400. , Setting values such as horizontal / vertical position, horizontal size, volume, language, key, screen effect, and mode.

Meanwhile, the first display apparatus 100 may further include a display unit 180, and the processor 130 may determine the second, third, and

fourth display apparatuses

200, 300, and 400 for the first command. The display unit 180 may be controlled to display whether to receive or display setting values of each of the second, third, and

fourth display apparatuses

200, 300, and 400.

As such, the display apparatus 100 according to the present exemplary embodiment may switch the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160, such as a PC. Even when the external device is not connected, the control command generated by the display apparatus 100 may be transmitted to the second display apparatus.

In addition, the display apparatus 100 according to the present exemplary embodiment may switch the connection between the RX line 131 and the TX line 132, the first bus 150, and the second bus 160, and thus the first display apparatus and the first display apparatus may be connected to each other. 2 The command can be sent to the second display device even when the IN port-OUT port connection is maintained without changing the display device to the IN port-IN port connection.

In addition, the display apparatus 100 according to the present exemplary embodiment may use the ACK command or the second, third and fourth display apparatuses of the second, third, and

fourth display apparatuses

200, 300, and 400 for the first command. By displaying the setting values of the respective 200, 300, and 400, the display system 10 determines whether the user has received the first command and the current state of each of the second, third, and

fourth display apparatuses

200, 300, and 400. The first display apparatus 100 may be checked without connecting an external device such as a PC.

According to FIG. 7, connecting the RX line to the first bus and the TX line to the second bus may include transmitting a command transmitted from an external device to the first interface unit and the processor through the first bus (S710). In operation S730, the command transmitted from the second display apparatus or the command generated by the processor may be transmitted to the second interface unit through the second bus.

This will be described in detail with reference to FIG. 8.

8 is a diagram for describing a method of transmitting a command of a display apparatus when an external device is connected to the multi display system.

8A illustrates that the connection between the RX line 131 and the TX line 132, the first bus 150, and the second bus 160 is switched while the first display device is connected to an external device and the second display device. It is a figure for explaining transmission of a previous command.

According to FIG. 8A, the second interface unit 120 may communicate with the external device 600. In detail, the RX line 111 of the second interface unit 110 may be connected to the TX line 612 of the interface unit 610 of the external device to receive a command from the external device. In addition, the TX line 122 of the second interface unit 120 is connected to the RX line 611 of the interface unit 610 of the external device to transmit or transmit the first command generated by the processor 130 to the external device. Commands generated by the second, third, and

fourth display apparatuses

200, 300, and 400 may be transferred.

The command transmitted from the external device may be a control command for controlling the states of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the display system 10.

The external device 600 may be a PC, but is not limited thereto and may be any device capable of transmitting control commands to the plurality of

display devices

100, 200, 300, and 400 constituting the multi-display system.

The command transmitted from the external device 600 may be transmitted to the processor 130 and the second display apparatus 200 of the first display apparatus 100.

Specifically, the command transmitted from the external device 600 is transmitted from the RX line 121 of the second interface unit 120 of the first display device through the TX line 612 and the cable of the interface unit 610 of the external device. Can be received.

In this case, the command received on the RX line 121 of the second interface unit 120 may be transmitted to the RX line 131 through the first bus 150. In addition, the processor 130 may receive a second command through the RX line 131, where the second command may be a command transmitted from the external device 600.

In addition, the command received on the RX line 121 of the second interface unit 120 may be transmitted to the first interface unit 110 through the first bus 150. The command transmitted to the first interface unit 110 may be transmitted to the RX line of the interface unit of the second display apparatus 200 through the TX line 112 and the cable of the first interface unit.

The command transmitted from the second display apparatus 200 or the first command generated from the processor 130 may be transmitted to the external device 600 through the second bus 160.

The first command generated and transmitted by the processor 130 or the command generated by the second, third and

fourth display apparatuses

200, 300, and 400 and transmitted to the external device 600 may be transmitted from an external device. It may be an ACK command that is a response to the transmitted command or may be state information of each of the first, second, third, and

fourth display apparatuses

100, 200, 300, and 400.

The command transmitted from the second display apparatus 200 may be received at the RX line 111 of the first interface unit 110 of the first display apparatus through the TX line and the cable of the interface unit of the second display apparatus 200. have.

In this case, the command received through the RX line 111 of the first interface unit 110 may be transmitted to the second interface unit 120 through the second bus 160. The command transmitted to the second interface unit 120 may be transmitted to the RX line 611 of the interface unit of the external device through the TX line 122 and the cable of the second interface unit.

Here, the command transmitted from the second display apparatus 200 may include a command generated from the second display apparatus 200, a command generated from the third display apparatus 300, and a command generated from the fourth display apparatus 400. can do.

Meanwhile, the first command generated by the processor 130 may be transmitted to the second interface unit 120 through the TX line 132 and the second bus 160. In this case, the command transmitted to the second interface unit 120 may be transmitted to the RX line 611 of the interface unit of the external device through the TX line 122 and the cable of the second interface unit.

8B shows the switching of the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 to connect the RX line to the second bus and the TX line to the first bus. It is a figure explaining one case.

According to FIG. 8B, the processor 130 switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 to connect the RX line 131 to the second bus. At 160, the TX line 132 may be connected to the first bus 150.

When the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150, the processor 130 uses the first bus 150 to display the second display device. The first command may be transmitted to 200. Specifically, the processor 130 generates a first command, and the first bus 150 connected with the TX line 132 of the processor 130 and the TX line 132 of the processor 130. And the second display device 200 through the TX line 122 of the second interface unit 120. The first command may be any kind of control command capable of controlling the states of the second, third and

fourth display apparatuses

200, 300, and 400. In addition, the first command may be a synchronization command for synchronizing the second, third, and

fourth display apparatuses

200, 300, and 400 with the first display apparatus 100.

Meanwhile, when the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150, the processor 130 receives the second command through the second bus 160. can do. Here, the second command may be a command transmitted from the second display apparatus 200. Specifically, when the second display apparatus 200 transmits a command, the processor 130 transmits the transmitted command to the RX line 111, the second bus 160, and the RX line 131 of the first interface unit 110. Can be received.

As described above, the display apparatus 100 according to the present exemplary embodiment switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus line 160 to which an external device is connected. Even in this state, the command generated by the display apparatus 100 may be transmitted to the second display apparatus.

In addition, the first display apparatus 100 may further include an input unit (not shown). In addition to controlling a multi-display system using an external device while the external device is connected, the first display device 100 may use an external device. Without the user's manipulation of the display apparatus 100, the

entire display apparatuses

100, 200, 300, and 400 included in the multi display system 10 may be controlled.

Meanwhile, after the connection between the RX line 131 and the TX line 132, the first bus line 150, and the second bus 160 is switched to transmit the first command to the second display apparatus 200, The processor 130 may control the switch unit 140 to release the switched state. Specifically, when the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150, the first command is transmitted to the second display apparatus 200. 130 again switches the connection of the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 so that the RX line 131 is a TX line on the first bus 150. The switch unit 140 may be controlled so that the 132 is connected to the second bus 160.

As such, after the first display apparatus 100 transmits the first command, the first display apparatus 100 again switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160. The plurality of

display apparatuses

100, 200, 300, and 400 may be controlled by the external device 600 again. In particular, it may be useful when only the time synchronization command needs to be transmitted from the first display apparatus 100 for a short time while being controlled by the external device 600. In detail, while the multi display system 10 is controlled by the external device 600, the multi display system 10 instantly transmits a synchronization command by switching the connection between the processor 130, the first bus 150, and the second bus 160. In addition, the multi display system 10 may be controlled by the external device 600 again by releasing the switching of the connection between the processor 130, the first bus 150, and the second bus 160.

Meanwhile, the processor 130 periodically switches a connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 to generate a first command generated by the processor 130. May be periodically transmitted to the second display apparatus 200.

In detail, the processor 130 normally does not switch the connection between the first bus 150 and the RX line 131 and the connection between the second bus 160 and the TX line 132. While maintaining the state of 8a, the RX line 131 is connected to the second bus 160 by switching the connection between the first bus 150 and the RX line 131 and the connection between the second bus 160 and the X line 132. The TX line 132 may be connected to the first bus 150. In addition, as the connection between the first bus 150 and the RX line 131 and the connection between the second bus 160 and the TX line 132 are switched, the processor 130 may generate the first generated by the processor 130. One command may be transmitted to the second display apparatus 200.

In addition, after transmitting the first command to the second display apparatus 200, the processor 130 connects the first bus 150 and the RX line 131 and the second bus 160 and the TX line 132. By switching the connection again, the switch unit 140 may be controlled such that the RX line 131 is connected to the first bus 150 and the TX line 132 is connected to the second bus 160.

The processor 130 transmits the first command by connecting the RX line 131 to the second bus 160 and the TX line 132 to the first bus 150 and removes the RX line 131. By repeating the process of connecting the TX line 132 to the second bus 160 on the first bus 150 at a predetermined cycle, the second display apparatus 200 periodically repeats the first command generated by the processor 130. ) Can be sent.

The first command transmitted from the first display apparatus 100 to the second display apparatus 200 may be a command for synchronizing the time of the second display apparatus 200 with the first display apparatus 100. In detail, the processor 130 sets the setting time of the first display apparatus 100 and the setting time of the second, third, and

fourth display apparatuses

200, 300, and 400 to set the setting time of the first display apparatus 100. You can send a command to do the same as

In addition, the processor 130 periodically switches the connection between the first bus 150 and the RX line 131 and the connection between the second bus 160 and the TX line 132 so that the second, third, and fourth A command for synchronizing the times of the

display apparatuses

200, 300, and 400 with the first display apparatus 100 may be periodically transmitted to the second display apparatus 200.

As such, by periodically switching the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus line 160, an external device such as a PC connected to the multi display system 10. While receiving a command from the user, the synchronization command generated by the first display device may be periodically transmitted to the second, third, and fourth display devices.

FIG. 8C is a diagram for describing a display apparatus 100 constituting a multi-display system according to another exemplary embodiment.

According to FIG. 8C, the display device 100 may further include a second switch unit 170.

The processor 130 switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 so that the TX line 132 is connected to the first bus 150. While the RX line 131 is connected to the second bus 160, the second switch unit 170 may be controlled to block a command transmitted from the external device 600 and transmitted to the first interface unit 110. .

In detail, as illustrated in FIG. 8C, commands transmitted from an external device while the TX line 132 is connected to the first bus 150 and the RX line 131 is connected to the second bus 160 may include the second, third, and the like. In order to prevent transmission to only the

fourth display apparatuses

200, 300, and 400, the processor 130 may transmit the TX line 132 to the first bus 150 and the RX line 131 to the second bus 160. The second switch unit 170 may be controlled to block a command transmitted from the external device 600 together with the connection to the.

Similarly, second, third, and

fourth display devices

200, 300, and 400 with TX line 132 connected to first bus 150 and RX line 131 connected to second bus 160. In order to prevent only the command transmitted from the command line 200 being transmitted to the external device 600, the processor 130 may include the TX line 132 on the first bus 150 and the RX line 131 on the second bus 160. ) And the second switch unit 170 may be controlled to block a command transmitted to the external device 600.

Meanwhile, in the present exemplary embodiment, the second switch unit 170 is described as being separately from the switch unit 140, but is not limited thereto. For example, the second switch unit 170 may be integrated in the switch unit 140 to perform a function performed by the second switch unit 170 in the switch unit 140.

FIG. 9 illustrates a flow of commands in a multi-display system connected in a daisy chain manner.

The second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may include all components of the first display apparatus 100 illustrated in FIG. 8C. However, the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may not include the switch unit 140 and the second switch unit 170.

9A is controlled by an external device while the first bus 150 and the RX line 131 of the first display apparatus 100 are connected and the second bus 160 and the TX line 132 are connected. A diagram illustrating a multi display system. The plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi-display system are connected in a daisy chain manner, and the first display apparatus 100 may be connected to the external device 600.

According to FIG. 9A, a command transmitted from the external device 600 may be transmitted to the first display apparatus 100 using a cable. In this case, the command transmitted to the first display apparatus 100 may be transmitted to the processor 130 of the first display apparatus and the first interface unit 110 of the first display apparatus through the first bus 150. . In addition, the command transmitted from the external device 600 may be transmitted to the second display apparatus 200 through the first interface unit 110 of the first display apparatus.

Like the first display apparatus 100, the second display apparatus 200 and the third display apparatus 300 may receive a command transmitted by the external device 600 from the processor and transmit the command to the next display apparatus.

The fourth display apparatus 400 may receive a command transmitted from an external device from the third display apparatus 300.

Meanwhile, the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system may transmit a command to an external device.

In detail, the processor of the fourth display apparatus 400 may generate a command and transmit the command to the third display apparatus 300 using the second bus of the fourth display apparatus.

Meanwhile, the processor of the third display apparatus 300 may generate a command and transmit the command to the second display apparatus using the second bus of the third display apparatus, and the command transmitted from the fourth display apparatus 400 may also be transmitted. 3 may be transferred to the second display device through the second bus of the display device.

The processor of the second display apparatus 200 may generate a command and transmit the command to the first display apparatus using the second bus of the second display apparatus, and the command and the third display transmitted from the fourth display apparatus 400. The command transmitted from the device 300 may also be transmitted to the second display device through the second bus of the second display device 200.

The processor 130 of the first display apparatus 100 may generate a first command and transmit the generated first command to the external device 600 using the second bus 160 of the first display apparatus 100. The command transmitted from the device 400, the command transmitted from the third display device 300, and the command transmitted from the second display device 200 may also be transmitted to the external device 600 through the second bus 160 of the first display device. Can be delivered.

9B shows that the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 is switched so that the RX line 131 is connected to the second bus 160. FIG. 1 illustrates a multi-display system controlled by the first display apparatus 100 with the line 132 connected to the first bus 150.

The connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 is switched so that the RX line 131 is connected to the second bus 160 and the TX line 132. ) Is connected to the first bus 150, the processor 130 of the first display device transmits the first command generated by the processor 130 to the second display device 200, the third display device 300, and the first command. 4 may be transmitted to the display apparatus 400.

In detail, the processor 130 of the first display device generates a first command for transmitting to the second display device 200, the third display device 300, and the fourth display device 400, and generates the generated command. May be transmitted to the second display apparatus 200 through the TX line 132, the first bus 150, and the second interface unit 120. Meanwhile, a method of receiving a command transmitted to the second display apparatus 200 by a processor of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 and transferring the command to the next display apparatus. The process is the same as the transfer process of the command transmitted from the external device described with reference to FIG. 9A, and thus will be omitted.

The second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may transmit a command to the first display apparatus 100. In the meantime, a method of transmitting a command to the first display apparatus 100 by the processor of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400, the second display apparatus 200, The process of transmitting the command by the second bus line of the third display apparatus 300 is the same as the process of transmitting the command to the external device described with reference to FIG. 9A, and thus will be omitted.

The first display apparatus 100 may receive a command generated by a processor of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 from the second display apparatus 200. . The command generated by the processor of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may include the second interface unit 120 and the second of the first display apparatus 100. It may be transferred to the processor 130 through the bus 160, the RX line 131.

Meanwhile, in the present exemplary embodiment, the multi display system 10 is described as being composed of four

display apparatuses

100, 200, 300, and 400, but the present invention is not limited thereto. The multi display system 10 may include two display apparatuses, three display apparatuses, or five or more display apparatuses. If only the display apparatuses corresponding to the first display apparatus 100 of the present exemplary embodiment are included, the number of display apparatuses may be included. Regardless, the multi-display system 10 including various numbers of display devices may be implemented.

Meanwhile, in the present embodiment, a plurality of display devices are connected in a daisy chain manner, but the present invention is not limited thereto. Specifically, the present invention can be applied to various connection combinations of a plurality of display devices connected to a display device serving as a master by the UART communication method.

FIG. 10 is a diagram illustrating a method of synchronizing the times of the second, third, and fourth display devices with the times of the first display device according to an exemplary embodiment.

According to FIG. 10A, the first command transmitted from the first display apparatus 100 may determine the time of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400. It may be a command for synchronizing with the time of 100).

Specifically, the processor 130 switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 so that the RX line 131 is connected to the second bus 160. ), When the TX line 132 is connected to the first bus 150, the processor 130 may transmit a first command to the second display apparatus 200. In this case, the first command may be a command for synchronizing the time of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 with the time of the first display apparatus 100. .

The first command may include time information set by the first display device. For example, when the time set in the first display device is “March 24, 2015 15:03:46”, the processor 130 may set the time as “March 24, 2015 15:03:46”. The first command including the information may be transmitted to the second display apparatus 200. The processor of the second display apparatus 200 may receive the first command and set the time of the second display apparatus 200 to “March 24, 2015 15:03:46”. In the same manner, the third display apparatus 300 and the fourth display apparatus 400 may also set the time to “March 24, 2015 15:03:46”.

In addition, the processor 130 of the first display device periodically switches a connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 to provide a time synchronization command. The display apparatus may periodically transmit the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400.

As such, the display apparatus 100 according to the present exemplary embodiment does not connect an external device and does not change the OUT-IN connection between the first display apparatus 100 and the second display apparatus 200 to an IN-IN connection. The plurality of

display apparatuses

100, 200, 300, and 400 may be configured to periodically transmit a time synchronization command to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus to configure a multi-display system. Can synchronize the time.

FIG. 10B illustrates the time of the plurality of

display apparatuses

100, 200, 300, and 400 that the first display apparatus 100 receives time information from a server and configures the multi display system 10 using the received time information. Is a diagram illustrating a method of synchronizing them.

The first display apparatus 100 may further include a communication unit (not shown) for communicating with a server.

The communication unit (not shown) may communicate with the server 700. In detail, the communication unit (not shown) may receive information about a current time from the server 700. The server 700 may be a server that provides a standard time of the region where the display device is located.

The processor 130 may set the time of the first display device to the time provided by the server 700 using the time information received through the communication unit (not shown). In addition, the processor 130 switches the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 so that the RX line 131 is connected to the second bus 160. The TX line 132 is connected to the first bus 150, and the time information received from the server 700 is transmitted to the second display apparatus 200, or the time information received from the server 700 is used. The time information of the first display apparatus 100 may be transmitted to the second display apparatus 200.

The second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 configure the multi display system by setting the time of each display apparatus using the received time information. Times of the plurality of

display apparatuses

100, 200, 300, and 400 may be synchronized.

As described above, according to the present invention, the first display apparatus communicates with a server to receive time information, and the entire plurality of display apparatuses constituting the multi-display system may synchronize time using the received time information. Therefore, each of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi-display system may reduce costs than when the time is set by receiving time information by communicating with a server. It is possible to prevent the setting time of each of the plurality of

display apparatuses

100, 200, 300, and 400 from changing according to the situation of a network in which each of the 100, 200, 300, and 400 is connected to the server.

FIG. 11 is a diagram for describing a method of setting one display device among a plurality of display devices configuring a multi-display system as a master.

Here, the master may transmit a command to other display devices by switching a connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 using a switch unit. Can be. In addition, the master may be a display device directly connected to an external device including an input unit or performing a function of the input unit. Meanwhile, display devices other than the master may be slaves.

According to FIG. 11, in the method of transmitting a command of a display apparatus configuring a multi-display system according to an exemplary embodiment, receiving a user input and transmitting the received user input to a second display apparatus (S1110), a first user input Blocking a user input transmitted to the second display device in response to the received (S1120), setting the first display device as a master (S1130), the RX line 131 and the TX line 132 and the first bus Connecting the RX line to the second bus and the TX line to the first bus (S1140) by switching the connection with the 150 and the second bus 160 (S1140), and a command for setting the second display device as a slave. Transmitting to the second display apparatus using the first bus (S1150), unblocking the user input transmitted to the second display apparatus, connecting the first bus to the TX line, and connecting the second bus to the RX line. To Connecting the TX line to the second bus and the RX line to the first bus by switching (S1160) and the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160; Periodically switching the connection of may include transmitting the first command generated by the processor to the second display device (S1170).

Receiving a user input and transmitting the received user input to the second display apparatus (S1110) will be described in detail with reference to FIG. 12.

12 illustrates a process in which the received user input is transmitted to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 when a user input is received at the first display apparatus 100. Figure is a diagram.

According to FIG. 12, the first display apparatus 100 may include an input unit (not shown) that receives a user input, and the received user input is displayed on the second display through the user

input transmission lines

1010, 1020, and 1030. The device 200 may be transmitted to the device 200, the third display device 300, and the fourth display device 400. Therefore, all of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system 10 may be collectively controlled by a user.

Meanwhile, in the present exemplary embodiment, the user

input transmission lines

1010, 1020, and 1030 are separately connected to the

cables

510, 520, and 530 that transmit commands generated by the external device or the first display apparatus 100. It is not limited to this. For example, the user

input transmission lines

1010, 1020, and 1030 may be included in the

cables

510, 520, and 530, and the user input received from the first display apparatus 100 by the RS-232C communication method may be included. The display apparatus 200 may be transferred to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400.

Meanwhile, when there is a user input for setting the first display apparatus 100 as a master, the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may be set as masters. In order to prevent this, the first display apparatus 100 may block a user input transmitted to the second display apparatus 200.

This will be described in detail with reference to FIG. 13A.

The first display apparatus 100 according to an exemplary embodiment of the present invention may include an input unit 191, a transmitter 192, and a user input transmission line 193. The input unit 191 may receive a user input, and the user input transmission line may transmit the user input received through the input unit 191 to the processor 130 and the transmission unit 192. The transmitter 192 may transfer the received user input to the second display apparatus 200.

The input unit 191 may be connected to the remote control apparatus 200 according to various communication methods such as Bluetooth, WB (Ultra Wideband), ZigBee, RF (Radio Frequency) communication, or infrared (IR) communication. Control signals such as power on / off, channel selection, screen setting, etc. may be received and processed, or may be processed to transmit control signals from the processor 130 to the remote controller 200.

FIG. 13B is a diagram illustrating a first display device in a state in which a user input transmitted to the second display device is blocked.

According to FIG. 13B, the first display apparatus 100 may further include a blocking unit 194. In addition, the processor 130 may control the blocking unit 194 to block a user input transmitted to the second display apparatus 200.

In detail, when a first input of a user is received through the user input receiver 170, the processor 130 controls the blocking unit 194 to block a user input transmitted to the second display apparatus 200. The user input transmitted to the second display 200, the third display device 300, and the fourth display device 400 may be blocked.

The first input may be a user input for displaying a UI window for setting a master / slave, a highlight movement to a menu for setting a master / slave, and a movement of a pointer to a menu for setting a master / slave.

However, the present invention is not limited thereto, and a user may input a specific key of a remote control apparatus (not shown) capable of transmitting a user input to the first display apparatus, or input a specific key mounted on the first display apparatus 100, The user input transmitted to the second display device may be blocked by selecting a specific menu displayed on the display unit of the first display device.

When the second input of the user for setting the first display apparatus 100 as a master is received, the processor 130 may set the first display apparatus 100 as a master. In detail, the processor 130 may select a menu for setting a master / slave on the display screen, input a specific key of the remote control apparatus, input a specific key included in the first display apparatus 100, or input the first display apparatus. When a second user input for setting the first display apparatus 100 as a master is received by selecting a specific menu displayed on the display unit, the first display apparatus 100 may be set as a master.

In addition, when the processor 130 sets the first display device as the master, the first display device 100 switches the connection between the processor 130, the first bus 150, and the second bus 160. The first command may operate as a master for transmitting the second command to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400.

As such, the multi-display system 10 may be blocked by blocking a user input transmitted from the first display apparatus 100 to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400. The plurality of

display apparatuses

100, 200, 300, and 400 may be prevented from being set as the master, and only the first display apparatus 100 may be set as the master.

FIG. 13C illustrates a connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 while switching off a user input transmitted to the second display device. FIG. 1 illustrates a first display device in which a line 131 is connected to the second bus 160 and a TX line 132 is connected to the first bus 150.

According to FIG. 13C, when the first display apparatus 100 is set as a master, the processor 130 connects the RX line 131 and the TX line 132 with the first bus 150 and the second bus 160. By switching, the RX line 131 may be connected to the second bus 160 and the TX line 132 may be connected to the first bus 150.

When the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150, the processor 130 may include the second display device 200 and the third display device 300. In addition, the command for setting the fourth display apparatus 400 as a slave may be transmitted to the second display apparatus using the first bus. Specifically, the RX line 131 is connected to the second bus 160 and the TX line ( When 132 is connected to the first bus 150, the processor 130 may perform a first command for setting the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 as slaves. May be transmitted to the second display apparatus 200 through the TX line 132, the first bus 150, and the TX line 112 of the first interface unit.

In this case, the second display apparatus 200 may set the second display apparatus 200 as a slave using the received command, and transmit the received command to the third display apparatus 300. The third display apparatus 300 may operate in the same manner as the second display apparatus 200, and the fourth display apparatus 400 may set the fourth display apparatus 400 as a slave using the received command. have.

As such, when the first display device is set as the master among the plurality of display devices configuring the multi-display system, the ID of each display device needs to be set by automatically setting the second, third, and fourth display devices as slaves. It is possible to collectively set the IDs of the plurality of display apparatuses.

FIG. 13D illustrates that the user input transmitted to the second display device is unblocked, and the connection between the RX line 131 and the TX line 132 and the first bus 150 and the second bus 160 which have been switched is switched again. The RX line 131 is connected to the first bus 150 and the TX line 132 is connected to the second bus 160.

According to FIG. 13D, the processor 130 unblocks a user input transmitted to the second display device, connects the first bus 150 with the TX line 132, and connects the second bus 160 with the RX line ( The connection of the 131 may be switched again to connect the TX line 132 to the second bus 160 and the RX line 131 to the first bus 150.

As such, after completing the master / slave setting of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system 10, by canceling the transmission of the user input, the multi display is performed using a single remote controller. The plurality of display devices included in the system 10 may be collectively controlled.

In addition, after the master / slave setting is completed, the connection between the switched processor, the first bus, and the second bus is switched again to return to the original state, thereby allowing the external device 600 to include the plurality of devices included in the multi display system 10. Control of the

display apparatuses

100, 200, 300, and 400.

Meanwhile, in the present exemplary embodiment, the input unit 191 is described as being mounted inside the first display apparatus 100, but is not limited thereto. In detail, the input unit 191 may be outside the first display apparatus 100, and communicates with a third interface unit (not shown) of the first display apparatus 100 to transmit a user input to the first display apparatus 100. ) Can be sent.

FIG. 13E periodically switches the connection of the first bus 150 and the RX line 131 and the connection of the second bus 160 and the TX line 132 with the master / slave set, thereby providing the first command. FIG. 4 is a diagram illustrating a method of periodically transmitting to a second display device, a third display device, and a fourth display device.

According to FIG. 13E, the first bus 150 and the RX line 131 of the first display apparatus 100 are set in a state in which the first display apparatus 100 is a master and the

other display apparatuses

200, 300, and 400 slaves are set. ) And the connection between the second bus 160 and the TX line 132 periodically, so that the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150. You can connect to it periodically. In addition, when the RX line 131 is connected to the second bus 160 and the TX line 132 is connected to the first bus 150, the processor 130 may transmit the first command to the second display apparatus 200. have.

In this case, the first command may be a command for synchronizing the setting time of the second, third, and

fourth display apparatuses

200, 300, and 400 with the setting time of the first display apparatus 100. In detail, the processor 130 periodically transmits a time synchronization command to the second display apparatus 200, so that the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 as slaves. The control time may be set to be the same as the first display apparatus 100 that is the master.

display apparatuses

100, 200, 300, and 400 constituting a multi display system.

According to FIG. 14, when a user input for setting setting values of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi-display system is received through the input unit 191, the plurality of constituents of the multi-display system may be configured. Each of the

display apparatuses

100, 200, 300, and 400 may display a UI screen for setting a setting value, and the UI screen includes

menus

1110, 1210, 1310, and 1410 for setting a master / slave. Can be.

According to FIG. 14, the first display apparatus 100, the second display apparatus 200, and the third display apparatus 300 are set as slaves, and the fourth display apparatus 400 is set as masters.

On the other hand, the plurality of

display devices

100, 200, 300, and 400 connected in a daisy chain manner have signals transmitted from the first display device 100 to the second display device 200, the third display device 300, and the fourth display. Since the device 400 is transmitted in order, the input unit 191 is mounted on the first display device 100. In addition, when the input unit 191 is outside the display device, the first display device 100 is directly connected to the input unit 191.

Therefore, when there is a user input for setting a master / slave, the first display apparatus 100 may be set as a master and the second, third, and

fourth display apparatuses

200, 300, and 400 may be set as slaves. have.

FIG. 15 is a diagram illustrating a method of blocking a user input transmitted to a second display device according to a first user input according to an exemplary embodiment of the present disclosure.

The screen of the first display apparatus 100 includes various menus for setting a setting value of the display apparatus 100. Meanwhile, the user input transmission line is connected to the first display apparatus 100, the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400, and the user may set a setting value of the display apparatus. By selecting a menu for setting, the setting values of the plurality of display apparatuses can be collectively set.

However, in the case of the master / slave setting, since the first display device 100 should be the master, the second, the third display device, and the fourth display device, the processor 130 of the first display device is the first user. When an input is received, the blocking unit 194 may be controlled to block a user input transmitted to the second display device.

The first user input may be a movement of a pointer to the master / slave setting menu 1410 as shown in FIG. 15A. In detail, when the user performs the control of the display apparatus using the pointer remote controller, when the pointer 1150 moves to the master / slave setting menu 1110, the processor 130 of the first display apparatus 100 performs a second operation. The blocking unit 194 may be controlled to block a user input transmitted to the display apparatus 200. Accordingly, all user inputs transmitted to the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may be blocked.

As illustrated in FIG. 15B, when the highlight 1160 for moving the menu according to the user's direction key input moves to the master / slave setting menu 1110, the processor 130 may display the second display device 200. The blocking unit 194 may be controlled to block a user input transmitted to the control unit.

Meanwhile, as illustrated in FIG. 15C, a user input transmitted to the

second display apparatuses

200, 300, and 400 may be blocked by a user input for displaying a UI 1180 for setting a master / slave. have. Specifically, when the master / slave setting menu 1170 is selected by the user's input and the UI 1180 for master / slave setting is displayed, the processor 130 transmits the user input to the second display apparatus 200. The blocking unit 194 may be controlled to block the blocking unit 194.

FIG. 16 illustrates a screen in which a first display device is set as a master by a user input.

According to FIG. 16, when a second user input for designating a first display device as a master is received, the processor 130 may set the first display device as a master.

In addition, the processor 130 switches the connection between the first bus 150 and the RX 131 line and the connection between the second bus 160 and the TX line 132 to connect the RX line 131 to the second bus ( A command for connecting the TX line 132 to the first bus 150 and setting the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 as slaves. May be transmitted to the second display apparatus 200 using the first bus 150.

FIG. 17 is displayed on the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system when a command for setting the second display apparatus, the third display apparatus, and the fourth display apparatus as a slave is transmitted. It is a figure which shows a UI screen.

Referring to FIG. 17, the first display apparatus 100 is set as a master according to a user input received through the input unit 191, and the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus are configured as masters. 400 is set as a slave according to the slave setting command transmitted from the first display device.

As illustrated in FIG. 18, the display unit 180 of the first display apparatus 100 may include a menu 1195 for turning on / off synchronization of a plurality of display apparatuses and a menu 1190 for setting a synchronization cycle. Can be displayed.

On the other hand, when a user input for turning on the synchronization mode is received through the input unit 191, the processor 130 switches a connection between the processor 130, the first bus 150, and the second bus 160 to perform a synchronization command. The display may be transmitted to the second display apparatus 200.

In addition, when a user input for setting a synchronization period is received through the input unit 191, the processor 130 inputs a connection between the processor 130, the first bus 150, and the second bus 160 by the user. Each cycle may be switched and a synchronization command may be transmitted to the second display apparatus 200.

Meanwhile, in the present exemplary embodiment, it is described that the user sets the synchronization and the synchronization period of the plurality of

display apparatuses

100, 200, 300, and 400 constituting the multi display system, but is not limited thereto. For example, whether the plurality of

display apparatuses

100, 200, 300, and 400 are synchronized may be set as a default.

Meanwhile, in the present exemplary embodiment, all of the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 have the same configuration, but the present disclosure is not limited thereto. For example, the fourth display apparatus 400 may not include the second interface unit, and the second display apparatus 200, the third display apparatus 300, and the fourth display apparatus 400 may include the switch unit 140. The input unit 191 and the blocking unit 194 may not be included.

Meanwhile, in the present exemplary embodiment, the first display apparatus 100 is set as a master and other display apparatuses are set as slaves according to a user input, but the present invention is not limited thereto. For example, when a plurality of

display apparatuses

100, 200, 300, and 400 are sold in one set, one display apparatus including the input unit 191 is a master and does not include the input unit 191. Another display device may be set to be set as a slave. As another example, when the input unit 191 exists outside the display device, the display device directly connected to the input unit 191 is set as a master, and the display device connected indirectly through another display device is set as a slave. Can be implemented.

The multi-display system may be a digital signage system. Digital signage is used to collectively refer to a display billboard that delivers information and advertisements by combining various IT technologies such as hardware, software, contents, and network. Can be. Such digital signage can be installed and operated in a place where people stay for a certain period of time such as large buildings and businesses with a large floating population such as terminals, government offices, bus stations, department stores, subways, airports, hotels and hospitals, elevators, cinemas, restaurants, shopping malls and shops. Can be.

In addition, stand-alone digital signage, one of the digital signages, is used to convert a signboard or a billboard into a plasma display panel (PDP), liquid crystal display (LCD), light emitting diode (LED), etc. Digital information display, and pre-produced information and advertising content can be stored in the storage unit for manual playback. Another type of networked digital signage is a digital information display via a communication network. The advertisement content may be transmitted, and content may be centrally transmitted and the state of the device may be managed.

The digital signage is, for example, an intelligent network TV capable of supporting at least one or more of a broadcast reception function, a computer support function, and an Internet function, and may have various interfaces such as a handwritten input device, a touch screen, or a spatial remote controller. Such display devices can also support wired or wireless networks to connect to the Internet or other digital devices, such as e-mail, web-browsing, banking or gaming. You can also perform the function of. On the other hand, the display device may use a general-purpose OS standardized for the above functions and support. Thus, the display device can freely add or delete various applications on the general-purpose OS kernel to perform a more user-friendly function.

Referring to FIG. 18, the display apparatus 1500 constituting the digital signage system according to another exemplary embodiment may include a broadcast receiver 1505, a communicator 1510, an external device interface 1515, and a storage 1520. , Input unit 1525, display unit 1530, audio output unit 1535, power supply unit 1540, first interface unit 1545, second interface unit 1550, processor 1555, switch unit 1560 And a remote control device 1600.

Here, the configuration shown in Figure 18 is an embodiment for explaining the present invention, some configurations may be deleted, added or a plurality of configurations may be integrated into one module according to the needs of those skilled in the art This configuration is also the present invention Belongs to the scope of rights.

The broadcast receiver 1505 may refer to a configuration of a general digital broadcast receiver including a tuner, a demodulator, and the like.

A tuner (not shown) may tune a specific broadcast channel according to a channel tuning command and receive a broadcast signal for the tuned specific broadcast channel.

The demodulator (not shown) may separate the received broadcast signal into a video signal, an audio signal, and a data signal associated with a broadcast program, and may restore the separated video signal, the audio signal, and the data signal into a form capable of outputting. .

The communication unit 1510 includes an Ethernet terminal for a wired network, a wireless LAN (Wi-Fi) for a wireless network, a wireless broadband (Wibro), a world interoperability for microwave access (Wimax), and high speed (HSDPA). Downlink Packet Access) communication standard and the like, and it can transmit and receive data. In addition, the communication unit 1510 may select and receive a desired application from among applications that are open to the public through the network.

In addition, the communication unit 1510 may transmit or receive data with another user or another electronic device through the connected network or another network linked to the connected network.

In addition, the communication unit 1510 may access a predetermined web page through a connected network or another network linked to the connected network. That is, by accessing a predetermined web page through the network, it is possible to send or receive data with the server.

In addition, the display apparatus 1500 constituting the digital signage system may be connected to a server through the communication unit 1510 to receive and output content.

In addition, the communication unit 1510 may receive content or data provided by a content provider or a network operator. That is, the communication unit 1510 may receive content such as a movie, an advertisement, a game, a VOD, a broadcast signal, and related information provided from a content provider or a network provider through a network.

In addition, the communication unit 1510 may receive the update information and the update file of the firmware provided by the network operator, and may transmit data to the Internet or the content provider or the network operator.

The communication unit 1510 may select and receive a desired application from among applications that are open to the public, through a network.

The external device interface 1515 may connect the external device and the digital signage 1500. Meanwhile, the display device may be connected to an external device such as a digital versatile disc (DVD), a blu-ray disc player, a game device, a camera, a camcorder, a PC, a tablet PC, a smartphone, and the like through the external device interface 1515. Can be connected by wire / wireless. In addition, the external device interface 1515 may receive an application or a list of applications in the adjacent external device and transmit the received application to the processor 1555 or the storage 1520.

The storage unit 1520 may store content received from a server or a mobile device, metadata of the content, and the like. In addition, the storage unit 1520 may temporarily store audio, video, and data signals received through the external device interface 1515 or the communication unit 1510. In addition, the storage unit 1520 may receive and store an application or a list of applications input through the external device interface 1515 or the communication unit 1510. The storage unit 1520 may be embodied as an EEPROM (Electrically Erasable Programmable Read-Only Memory).

The input unit 1525 may transmit a signal input by the user to the processor 1555 or may transmit a signal of the processor 1555 to the user. For example, the input unit 1525 may be configured such as power on / off, channel selection, screen setting, etc. from the remote control device 1600 according to various communication methods such as a radio frequency (RF) communication method and an infrared (IR) communication method. The control signal may be received and processed or the control signal of the processor 1555 may be transmitted to the remote control device 1600.

The display unit 1530 converts an image signal, a data signal, an OSD signal, or an image signal, data signal, etc. received from the external device interface 2030 processed by the controller 2054 into R, G, and B signals, respectively. Generate a signal. The display unit 2060 may be a PDP, an LCD, an OLED, a flexible display, a 3D display, or the like.

In addition, the display 1530 may display a UI screen for setting a setting value of the digital signage 1500 under the control of the processor 1555. In addition, when the state information of the plurality of digital signages configuring the multi display system is received through the second interface unit 1550, the display unit 1530 may display the received state information under the control of the processor 1555. Can be.

The audio output unit 1535 may receive a signal processed by the processor 1555, for example, a stereo signal, a 3.1 channel signal, a 5.1 channel signal, or 6 channels, and output the audio.

The power supply unit 1540 performs a power supply role required for each configuration for the display apparatus 1500 constituting the digital signage. For example, the power supply unit 1540 may include a processor 1555 that may be implemented in the form of a System On Chip (SOC), a display unit 1530 for displaying an image, and an audio output for audio output. Power may be supplied to the unit 1535.

The remote control device 1600 transmits a user input to the input unit 1525. To this end, the remote controller 2100 is, for example, Bluetooth (Bluetooth), RF (Radio Frequency) communication, Infrared (IR) communication, UWB (Ultra Wideband), ZigBee (RS-232, RS-485, etc.) Can be used.

The processor 1555 may control the display unit 1530 to process an image signal and display an image corresponding to the image signal. In addition, the image signal processed by the processor 1555 may be transmitted to the external output device through the external device interface unit 1515.

The audio signal processed by the processor 1555 may be audio output to the audio output unit 1535. In addition, the voice signal processed by the processor 1555 may be input to the external output device through the external device interface unit 1515.

In addition, the processor 1555 may control overall operations in the display apparatus 1500 constituting the digital signage system.

In addition, the processor 1555 may control the display apparatus 1500 by a user command or an internal program input through the input unit 1525, and access the network to display an application or a list of applications desired by the user. You can download it to mine.

In addition, when the video and audio of the channel selected by the user are received through the broadcast receiving unit 1505, the processor 1555 may output the received video or audio through the display unit 180 or the audio output unit 185. do.

In addition, the processor 1555 may output an image signal from an external device input through the external device interface unit 1515, for example, a camera or a camcorder, according to an external device image playback command received through the input unit 1525. The audio signal may be output through the display unit 1530 or the audio output unit 1535.

The processor 1555 may control the display unit 180 to display an image, for example, a broadcast image input through the broadcast receiving unit 1505 or an external input through the external device interface unit 1515. The input image, the image input through the communication unit 1510, or the image stored in the storage unit 1520 may be controlled to be displayed on the display unit 1530. In this case, the image displayed on the display unit 1530 may be a still image or a video, and may be a 2D image or a 3D image.

In addition, the processor 1555 may control the content stored in the display apparatus 1500, the received broadcast content, or the external input content input from the outside to be reproduced. It may be in various forms such as still images, connected web screens, and document files.

Meanwhile, the input unit 1525, the display unit 1530, the first interface unit 1545, the second interface unit 1550, the processor 1555, and the switch unit 1560 are the input units 191 described with reference to FIGS. 2 to 14. ), The display unit 180, the first interface unit 150, the second interface unit 160, the processor 130, and the switch unit 140 may perform all functions.

On the other hand, the processor (130, 1555) is generally in charge of controlling the device, and may be used interchangeably with terms such as a central processing unit, a microprocessor, a controller.

The present invention described above can be embodied as computer readable codes on a medium in which a program is recorded. The computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. This also includes those implemented in the form of carrier waves (eg, transmission over the Internet). In addition, the computer may include the controller 180 of the terminal. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims

An apparatus for configuring a multi-display system,

A first interface unit providing a connection path for connection with another device;

A second interface connected to the first interface via a first bus and a second bus;

A processor that transmits a first command and receives a second command;

A TX line connecting the processor and 'one of the first bus and the second bus' to transmit the first command;

An RX line connecting the processor and 'one of the first bus and the second bus' to transfer the second command; And

A switch unit connecting the RX line with any one of the first bus and the second bus, or connecting the TX line with any one of the first bus and the second bus,

The processor,

The switch unit to connect the RX line to the first bus, the TX line to the second bus, or the RX line to the second bus, and the TX line to the first bus, respectively. To control

Devices that make up a multi-display system.
The method of claim 1,

The first interface unit communicates with the second device,

The processor,

When the RX line is connected to the second bus and the TX line is connected to the first bus,

Send the first command to the second device using the first bus,

Receive the second command through the second bus,

The second command,

A command sent from the second device

Devices that make up a multi-display system.
The method of claim 2,

The processor,

Periodically connecting the RX line to the second bus and the TX line to the first bus, and periodically transmitting the first command to the second display device using the first bus.

Devices that make up a multi-display system.
The method of claim 2,

The first command,

Command for synchronizing the time of the second device with the time of the device

Devices that make up a multi-display system.
The method of claim 4, wherein

Further comprising a communication unit for communicating with the server,

The processor,

Setting the time of the device using the time information received from the server

Devices that make up a multi-display system.
The method of claim 1,

The first interface unit communicates with the second device,

The second interface unit communicates with an external device,

The first bus,

In a state in which the RX line is connected to the first bus and the TX line is connected to the second bus, a command transmitted from the external device is transmitted to the first interface unit and the RX line,

The second bus,

When the RX line is connected to the first bus and the TX line is connected to the second bus, a command transmitted from the second display device or a command generated by the processor is transferred to the second interface unit.

Devices that make up a multi-display system.
The method of claim 1,

An input unit to receive a user input;

A transmitter to transmit the received user input to a second device;

Further comprising a blocker to block the user input is transmitted,

The processor,

Control the blocker to block the transmitted user input as a first user input is received,

When a second user input for designating the device as a master is received, set the device as a master, connect the RX line to the second bus, the TX line to the first bus, and the first bus. Transmits the first command to the second display device using;

When the first command is transmitted, control the blocking unit to release blocking of the transmitted user input, connect the RX line to the first bus, the TX line to the second bus,

The first command,

A command for setting the second display device as a slave

Devices that make up a multi-display system.
The method of claim 1,

The second interface unit and the first interface unit,

Communicating with the external device and the second display device using the RS-232C communication protocol, respectively.

Devices that make up a multi-display system.
The method of claim 1,

The device,

The display device further comprises a display unit for displaying an image

Devices that make up a multi-display system.
In the command transmission method of the device constituting the multi-display system,

The device,

A first interface unit providing a connection path for connection with another device;

A second interface connected to the first interface via a first bus and a second bus;

A processor that transmits a first command and receives a second command;

A TX line connecting the processor and 'one of the first bus and the second bus' to transmit the first command; And

An RX line connecting the processor and 'any one of the first bus and the second bus' to transfer the second command;

The command transmission method of the device,

Coupling the RX line to the first bus and the TX line to the second bus; And

Switching the connection of the RX line and the first bus, the connection of the TX line and the second bus, connecting the RX line to the second bus and the TX line to the first bus.

Method for transmitting commands of devices constituting a multi-display system.
The method of claim 10,

The first interface unit,

Communicate with a second device,

The command transmission method of the display device,

When the RX line is connected to the second bus and the TX line is connected to the first bus,

Sending the first command to the second device using the first bus; And

Receiving the second command over the second bus,

The second command,

A command sent from the second device

Method for transmitting commands of devices constituting a multi-display system.
The method of claim 11,

The switching step,

Periodically connecting the RX line to the second bus and the TX line to the first bus, and periodically transmitting the first command to the second display device using the first bus.

Method for transmitting commands of devices constituting a multi-display system.
The method of claim 10,

The command transmission method of the device,

Switching the connection of the RX line and the second bus, the connection of the TX line and the first bus, connecting the RX line to the first bus and the TX line to the second bus; Containing

Method for transmitting commands of devices constituting a multi-display system.
The method of claim 10,

The first interface unit communicates with the second device,

The second interface unit communicates with an external device,

Connecting the RX line to the first bus and the TX line to the second bus,

Transmitting a command transmitted from the external device to the first interface unit and the processor through the first bus; And

Transmitting a command transmitted from the second display device or a command generated by the processor to the second interface unit through the second bus.

Method for transmitting commands of devices constituting a multi-display system.
The method of claim 10,

The command transmission method of the device,

Receiving a user input and transmitting the received user input to a second device;

Blocking the transmitted user input as a first user input is received;

Setting a device as a master when a second user input for designating the device as a master is received;

Connecting the RX line to the second bus, the TX line to the first bus, and transmitting the first command to the second display device using the first bus;

Unblocking the transmitted user input; And

Coupling the RX line to the first bus and the TX line to the second bus,

The first command,

A command for setting the second device as a slave

Method for transmitting commands of devices constituting a multi-display system.