KR20050090836A - (a) multi vision system - Google Patents

Abstract

The present invention relates to a video display device, and more particularly, to a multi-vision system that can easily control a plurality of video display devices using only one serial port of the PC, and a video signal supply unit for supplying a plurality of video signals and And a multi vision unit configured to receive at least one video signal from the video signal supply unit and display the video signal on the corresponding video display device, and automatically determine the number of the video display devices constituting the multi vision unit. It consists of a PC that controls the video display device to execute the desired function according to the user's demands, and it is possible to easily implement a multi vision system that requires expensive equipment by using only a notebook or a PC, and to provide more functions. Video display device because it has auto detection function. By simply connecting, it is recognized automatically and each image display device can be identified so that individual control or collective control can be easily implemented.

Description

Multi vision system {(A) multi vision system}

The present invention relates to a video display device, and more particularly, to a multi-vision system for easily controlling a plurality of video display devices using only one serial port of a PC.

A general multivision system is a system for enlarging or reducing a single image and outputting the image to a screen. The multivision system is connected to a plurality of image output means to form a multivision system. Is a system for outputting.

The multi-vision system described above is installed in front of an exhibition hall or a predetermined event hall and is used for the purpose of advertising by outputting an image required for the exhibition or event, and also in a place equipped with a karaoke system such as karaoke, etc. The multi-vision system is often used for a display device that outputs subtitles to induce user's interest.

However, the above-described multi-vision system has to be connected to several display devices, so the size of the multi-vision system becomes large, so that the installation is not easy when the place is narrow, and the installation cost is expensive, so it is difficult to install easily. There was this.

Hereinafter, a multivision system according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram showing a multi-vision system according to the prior art.

As shown in FIG. 1, the multi-vision system according to the related art includes a video signal supply unit 10 for supplying a plurality of video signals, a multi vision unit 30 including at least one video display device, and the video. The multi-vision control unit 20 controls the video signal supplied through the signal supply unit 10 to be displayed in a predetermined area in the image display device constituting the multi vision unit 30.

In this case, the video signal supply unit 10 is composed of first to third video signal supply units 11, 12, 13 to supply a plurality of video signal sources, and the first to third video signal supply units 11. After inputting different video signals from the 12 and 13 to the multi-vision control unit 20, the video signals must be connected to a plurality of video display devices forming the multi vision unit 30.

That is, the multi vision unit 30 is a cathode ray tube monitor or a liquid crystal display device, and an image display device of the same type is connected to a predetermined port of the multi vision control unit 20. In other words, there is no connection between the image display devices, and is connected to the multi-vision control unit 20.

In addition, the multi vision unit 30 is configured in the form of n matrices, but the display device 1-n (31c) in the display device 1-1 (31a) in the first row and the display device 2-1 (in the second row) ( In 32a), it can be seen that the control signal of the multi-vision control unit 20 is connected to each display device such as the display device 2-n (32c).

In the conventional multivision system configured as described above, when a video signal is input from the video signal supply unit 10, the multivision control unit 20 outputs the same video signal according to a user's request as shown in FIG. It may be displayed on all video display devices forming the unit 30, and as shown in FIG. 2 (b) by displaying one video signal through all the video display devices forming the multi vision unit 30, The video display device may be used as a single video display device.

In this case, the one video signal is to be displayed through all the video display devices forming the multi vision unit 30 as follows.

That is, when a video signal is input through the video signal input unit 10, the multivision controller 20 divides the image by the number of video display devices forming the multi vision unit 30, and the divided image is Outputs the video signal to the video display device at the designated location so that it can be displayed on the video display device.

In addition, as illustrated in FIG. 2C, a plurality of screens may be configured by inputting different video signals to each video display device.

However, in the multi-vision system according to the related art, the video signal input through the video signal input unit 10 is input to the multi-vision control unit 20 so that only the video signal is input to the video display device constituting the multi vision unit 30. Since no control is possible, only the application of the image display device such as brightness, contrast, color, image magnification, image reduction, and the like, has a problem in that it cannot control and use the original functions provided by the image display device.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to easily control a plurality of video display devices configuring a multi vision unit using only one serial port of a PC.

In addition, it is possible not only to build a multi-vision using a single PC, but also to allow individual or collective control of a plurality of video display devices constituting a multi-vision.

The multi-vision system according to the present invention for achieving the above object is composed of a video signal supply unit for supplying a plurality of video signals, and at least one video display device, and receives the video signal from the video signal supply unit corresponding video It consists of a multi vision unit for displaying on a display device, and a PC for automatically identifying the number of video display devices constituting the multi vision unit and controlling a desired function to be executed on the video display device according to a user's request. It has its features.

Preferably, the video display device constituting the multi vision unit is connected to the serial port of the PC by a serial cable.

More preferably, the image display device constituting the multi vision unit may further include a microcomputer for outputting a corresponding control signal according to a user request command input through the PC, and selectively connecting to the serial port of the PC according to the control signal of the microcomputer. It is configured to include a switching unit that has the characteristics.

Hereinafter, a multi-vision system according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing a multi-vision system according to the present invention, Figure 4 is a view showing a connection state between the image display device and a PC shown in FIG.

As shown in FIG. 3, the multi-vision system according to the present invention comprises a video signal supply unit 100 for supplying a plurality of video signals, and at least one video display device, and receives a video signal from the video signal supply unit. Multi-vision unit 300 for receiving the input and display on the video display device, the number of the video display device constituting the multi-vision unit 300 is automatically identified, and desired for the video display device according to user requirements PC 200 is configured to control the function to be executed.

The video signal supply unit 100 is composed of first to third video signal supply units 101 to 103 to supply a plurality of video signals, and the multi vision unit 300 also displays a plurality or one video signals. In order to do so, the first to sixth image display devices 301 to 306 are connected in serial.

That is, when the video signal output through the first to third video signal supply units 101, 102, 103 is directly connected only to the fourth video display device 304, the fourth video display device 304 is provided. Is connected in series with the fifth image display device 305, the fifth image display device 305 is a sixth image display device 306, and the sixth image display device 306 is a third image display device. 303 and the third image display device 301 are serially connected to the second image display device 302 and the second image display device 302 to the first image display device 301.

In addition, the PC 200 may also directly connect only the serial port of the PC 200 and the fourth image display device 304, similarly to the serial connection of the video signal input unit 100 and the multi vision unit 300. When connected, the remaining video display devices are connected by serial cable.

The multi vision system according to the present invention automatically assigns an ID to each video display device 301 to 306 connected to the multi vision unit 300 through software of the PC 200 and simultaneously displays the connected video. Know the total number of devices.

After such automatic detection, the user controls to execute a desired function on a specific video display device or all video display devices through the software of the PC 200. For example, the PC 200 software serializes all the functions that the video display device can provide, such as brightness, contrast, color, and zoom, by powering on / off the video display device or changing the input selection. Instruct the video display device via a cable to be processed.

Therefore, in the production line, necessary adjustments can be made to a plurality of video display devices at the same time, and information on the success or failure or the current state is obtained by receiving feedback from the video display device of the result or status of the adjustment after the adjustment is completed. You can find out.

A connection relationship between the PC 200 and the image display device for implementing the above-described operations will be described with reference to FIG. 4 by referring to the fourth image display device 304 and the fifth image display device 305, for example. .

That is, as shown in FIG. 4, when a user request command is transmitted through the Tx of the serial cable connected to the serial port 201 of the PC 200, the microcomputer 304a of the fourth image display device 304. After receiving this command (Rx) and grasping the corresponding command and outputs a switching control signal if it is a command suitable for the user, it receives a request command transmitted from the PC 200 by turning on the switching unit 304b.

Here, the packet structure between the PC 200 and the microcomputer 304a of the image display device is defined as follows.

1) Master to Slave

Slave address Packet size Command parameter CRC

2) Slave to Master

Slave address Packet size Reply parameter CRC

At this time, the slave address is the ID of the video display device to receive and receive the command indicated by the software of the PC, and only the PC can be the master in communication, and the video display devices can operate dependently or ripple according to the command of the master. The slave is a slave.

The slave can never initiate communication voluntarily. Therefore, if the slave address is '0', the command can be executed in a batch on all currently connected video display devices, and the video display device should ignore packets whose ID and slave address do not match after completion. do.

In addition, the packet size indicates the size of the corresponding packet. Since the size of the parameter is determined according to the command and the reply, the size of the packet may vary, and the command instructs the PC to perform a desired operation on the image display device. As a result, all functions provided by the image display device such as brightness, contrast, color, image enlargement and reduction, and power on / off may be commands.

In the case of the reply, it may trigger the operation of the video display device according to the command, but may request the status information of the video display device. A reply is a response to a command for requesting status information of a video display device, and a command for requesting a reply from the video display device should never be sent to all video display devices in a batch. Because the master is the PC alone, the command can be sent at any time, but if two video display devices that are slaves attempt to communicate at the same time, the data transmitted to the PC is corrupted due to the collision.

The parameter is a parameter or additional information about a command or a reply, and there is no size limitation on the parameter. The parameter may have a size greater than or equal to '0' according to the command and the reply.

Lastly, the CRC stands for Cyclic Redundancy Checking and is used to detect whether there is an error in the continuous data transmitted.

The multi vision system according to the present invention transmits a command for notifying the start of auto detection in the PC 200 to all the image display devices of the multi vision unit 300, and the image display device 100 starts the auto detection. When receiving a command to inform the switch off the switch 304b by using a switch control pin connected to the microcomputer (304a) in the image display device.

Therefore, in the disconnected state, only one image display device capable of receiving a command from the PC exists, and all other image display devices cannot receive the command from the PC.

That is, the PC 200 generates a series of IDs and transmits a command for assigning them to the video display device, and the video display device sends the ID transmitted from the PC 200 to its own ID when its switch is open. Recognize and store as, and if the ID is sent to the PC to the reply to confirm that the PC 200 has received the corresponding ID.

Therefore, if the switch 304b is connected to the on state using the switch control pin after transmitting a reply for the given ID, the switch is transmitted from the PC 200 in the on state connected to the switch. All IDs are ignored.

If there is no reply to confirm that the corresponding ID has been given from the video display device while repeating the above-described process, the PC 200 generates an ID and transmits the ID to the video display device. If there is no further reply while repeating a predetermined number of times to check the PC 200 that the corresponding ID has been assigned, it means that there is no more connected video display device. Therefore, the auto detection ends when there is no video display device connected.

As described above, the multi-vision system according to the present invention has the following effects.

First, a multi-vision system that requires expensive equipment can be easily implemented with a notebook or PC alone, and can provide more functions.

Second, since there is an auto detection function, it is automatically recognized by simply connecting video display devices, and each of the video display devices can be identified so that individual control or collective control can be easily implemented.

Third, all functions and services provided by the video display device to the user can be controlled using a PC or a laptop, so no separate control equipment is required.

Fourth, by using the software to control the video display device from a PC or laptop, it is possible to control the video display without purchasing other equipment for new or changed functions, thereby minimizing maintenance costs.

1 is a block diagram illustrating a multi vision system according to the prior art.

2 is a diagram illustrating an example of a multi-vision screen according to the related art.

3 is a block diagram illustrating a multi vision system according to the present invention.

4 is a diagram showing the detailed configuration of the PC and the multi-vision unit shown in FIG.

Explanation of symbols for main parts of the drawings

100; Video signal input sections 101 to 103: First to third video signal input sections

200: PC 300: multi vision unit

301 to 306: first to sixth image display devices

304a, 305a: Micom 304b, 305b: Switch

Claims (3)

A video signal supply unit for supplying a plurality of video signals; A multi vision unit comprising at least one image display device and receiving the image signal from the image signal supply unit and displaying the image signal on the image display device; And, And a PC configured to automatically determine the number of video display devices configuring the multi vision unit and to control a function to be executed on the video display device according to a user's request. The method of claim 1, The video display device forming the multi vision unit is connected to the serial port of the PC by a serial cable. The method of claim 1, The video display device configuring the multi vision unit And a switching unit for selectively connecting a control signal according to a user request command input through the PC, and a switching unit selectively connecting to the serial port of the PC according to the control signal of the microcomputer.