KR100876963B1 - System for video wall using wireless network and method thereof - Google Patents

Abstract

Disclosed are a video wall system utilizing a wireless network and a method of operating the same. That is, according to the present invention, according to a control signal input from a separate control device, the first video signal input from a plurality of video output devices are compressed in a predetermined manner to convert into a second video signal, the converted second A wireless transmission device for converting and transmitting an image signal and the control signal into a wireless signal; And a plurality of unit cells including a thin film transistor-liquid crystal display (TFT-LCD), receiving the second image signal and the control signal transmitted from the wireless transmission device, and receiving the received control signal. The display apparatus may include a display device configured to display the received second image signal through a corresponding thin film transistor-liquid crystal display among the plurality of thin film transistor-liquid crystal display devices, thereby wirelessly transmitting a control signal for image signal and signal processing. Can be provided to implement the image.

Video Wall, Ultra Wide Band (UWB)

Description

Video wall system using wireless network and its operation method {SYSTEM FOR VIDEO WALL USING WIRELESS NETWORK AND METHOD THEREOF}

The following drawings, which are attached in this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 is a schematic structural diagram of a video wall system according to the prior art;

2 shows a schematic configuration diagram of a display apparatus according to the prior art.

3 is a schematic structural diagram of a video wall system utilizing a wireless network according to an embodiment of the present invention.

4 is a schematic configuration diagram of a wireless transmitting device according to the present invention;

5 is a schematic configuration diagram of a display device according to the present invention;

6 is a schematic structural diagram of a radio receiving apparatus according to the present invention;

7 is a schematic configuration diagram of a control board according to the present invention.

       8 is a flowchart illustrating a video wall system operating method utilizing a wireless network according to the present invention.

Explanation of symbols on the main parts of the drawings

100: wireless transmission device 110: video encoder (Video Encoder)

120: wireless transmitter 130: first system controller

140: antenna 200: display device

210: wireless receiver 211: wireless receiver

212: Video Decoder 213: Second System Control Unit

220: control board 221: analog-to-digital converter

222: switching unit 223: third control system

224: storage device

230: thin film transistor-liquid crystal display device (TFT-LCD)

300: video output device 400: control terminal

500: sound processing device

The present invention relates to a video wall system, and more particularly, to a video wall system using a wireless network that implements an image by wirelessly receiving a video signal and a control signal for signal processing using a wireless network. .

The video wall system combines several TFT-LCDs to realize a single large screen, receives various multimedia video signals from a computer, a DVD player, a CCTV, and the like, and is formed on the screen formed by the TFT-LCD combinations. Refers to a kind of large display device displayed on. Since the video wall system can be customized in various sizes and ratios according to the number of TFT-LCDs forming the screen, the video wall system is applied to a wide range of fields such as airports, cinemas, companies, public places, and control centers.

1 shows a schematic configuration diagram of a video wall system according to the prior art.

As shown in FIG. 1, the conventional video wall system includes a display device capable of implementing various sizes of screens desired by a consumer from 30 inches to 500 inches by combining a plurality of TFT-LCDs 11. 10); A multi-image processing apparatus 20 which receives various image signals output from the image output apparatus 30 such as a PC, a DVD, a VCR, a camera, a TV, a cable TV, a satellite broadcast, and provides them to the display apparatus 10; And a control terminal 40 for controlling the display device.

 In addition, as shown in FIG. 2, the display apparatus 10 is attached to each TFT-LCD 11 individually, and the image signal and the control terminal 40 input from the multiple image processing unit 20. And a control board 12 for receiving and processing a control signal input from the same, thereby expanding, reducing, and dividing an image displayed according to the control signal.

However, in the above-described video wall system according to the related art, wired wiring for transmitting image signals between the image output apparatus 30 and the display apparatus 10 is made. For this reason, the conventional video wall system has a limitation in the system installation position due to wired wiring, and as the size of the display device 10 increases, internal wiring increases, which causes an inevitable increase in its size.

In addition, each of the control boards 12 separately attached to the TFT-LCD 11 receives the control signals through an RS-232C cable wired in a serial connection form. Therefore, in the conventional video wall system, even when one control signal is transmitted to a specific control board 12, all the control boards attached to the entire unit cell, that is, the respective TFT-LCDs 11, are transmitted. 12) has an inefficient signal transmission scheme that must be transmitted to In addition, in the case of continuously transmitting the control signal, there is a problem in that it does not properly receive and process the control signal transmitted from each control board 12 due to the signal delay.

Furthermore, when the number of TFT-LCDs 11 increases, the wiring length of the RS-232C cable also naturally increases. Therefore, the conventional video wall system must provide a separate amplifier for preventing signal attenuation on the wiring, which causes problems such as cost increase and system size increase in system configuration.

Accordingly, the present invention was created to solve the problems inherent in the prior art as described above, and an object of the present invention is to wirelessly receive and process image signals and control signals through a wireless network, and display them on a large screen. The present invention provides a video wall system using a network and a method of operating the same.

According to an aspect of the present invention for achieving the above object, there is provided a video wall system utilizing a wireless network: the system from a plurality of video output devices in accordance with a control signal input from a separate control device; A wireless transmission device for compressing an input first video signal into a second video signal by compressing the predetermined first video signal, and converting and transmitting the converted second video signal and the control signal into a wireless signal; And a plurality of unit cells including a thin film transistor-liquid crystal display (TFT-LCD), receiving the second image signal and the control signal transmitted from the wireless transmission device, and receiving the received control signal. The display device may include a display device configured to display the received second image signal through a corresponding thin film transistor liquid crystal display device among the plurality of thin film transistor liquid crystal display devices.

In the above configuration, the system may further include a sound processing device for receiving and processing a sound signal according to the first video signal input from the plurality of video output devices.

In the above configuration, the wireless transmission apparatus compresses each first video signal input from the plurality of video output devices in the predetermined manner to convert the first video signal into the second video signal, and converts the second video signal into the converted second video signal. A video encoder for assigning and outputting a unique channel number; A wireless transmitter which converts each of the second image signal and the control signal assigned with the unique channel number into a wireless signal and wirelessly transmits through an antenna provided; And a first system controller configured to control an operation of the wireless transmitter according to the control signal input from the separate control device.

In the above configuration, the video encoder compresses each of the input first video signals using an MPEG method and converts the first video signals into second video signals.

In the above configuration, the wireless transmitter converts the second video signal and the control signal into the wireless signal of a UWB (Ultra Wide Band) scheme.

In the above configuration, each unit cell receives a plurality of second video signals and control signals transmitted from the radio transmitting apparatus, and converts the received second video signals into the first video signals and outputs the radio signals. A receiving device; A control board for selectively outputting the first image signal according to the control signal received through the wireless receiving device; And the thin film transistor-liquid crystal display device which receives the first image signal output through the control board and displays a screen according thereto.

In the above configuration, the wireless receiving apparatus may include: a wireless receiving unit configured to receive the plurality of second image signals and control signals assigned with unique channel numbers through separate antennas; A video decoder which decodes a specific second video signal of the plurality of second video signals received through the wireless receiver, converts the first video signal into a first video signal, and outputs the first video signal; And a second system controller configured to receive the control signal to control operations of the wireless receiver and the video decoder.

In the above configuration, the video decoder may enlarge, reduce, and divide the specific second video signal into the first video signal through selective operation control of the second system controller.

In the above configuration, the control board, the analog-to-digital conversion unit for performing a digital conversion for the analog video signal included in the first video signal received from the wireless receiving device; A switching unit for selectively transferring the output signal of the analog-digital conversion unit and the digital image signal included in the first image signal received from the wireless receiving device to the thin film transistor-liquid crystal display device; And a third control system configured to control operations of the analog-digital converter and the switching unit according to the control signal.

In the above configuration, the plurality of video output devices are devices for outputting video signals including at least one of a PC, a DVD, a VCR, a camera, a TV, a PDA, and a PMP.

According to yet another aspect of the present invention, there is provided a method for operating a video wall system utilizing a wireless network, the method comprising: transmitting a first video signal from a plurality of video output devices and a separate control device from a wireless transmitting device; Receiving a control signal; b) the radio transmitting apparatus compresses each of the first video signals in a predetermined manner to convert them into a second video signal, and assigns a unique channel number to each of the converted second video signals; c) converting and outputting, by the wireless transmitting apparatus, the second video signal and the control signal to which the unique channel number is assigned, into a wireless signal; d) receiving, by a plurality of unit cells constituting a display apparatus, the plurality of second image signals and the control signal transmitted from the wireless transmitting apparatus; e) converting each of the unit cells into a first image signal by converting a second image signal having a specific channel among the plurality of second image signals; And f) each unit cell displaying the converted first image signal according to the control signal.

In the above configuration, in step b), the wireless transmission apparatus compresses the first video signal using an MPEG method and converts the first video signal into the second video signal.

In the above configuration, in step c), the wireless transmitter converts the second video signal and the control signal into the UWB (Ultra Wide Band) method.

In the above configuration, the step e) may include the unique channel number mapped to itself among the plurality of second video signals having respective unique channels according to the control signal received from the wireless transmitting apparatus. And decodes only the second video signal to which the second video signal has been assigned.

In the above configuration, in step e), each unit cell selectively enlarges, reduces, and divides the second image signal of the specific channel according to the control signal to convert the unit image into the first image signal.

In the above configuration, step f) comprises: f-1) identifying signal components of the first video signal; And f-2) determining a transmission route of the first video signal according to the signal component of the first video signal, and transmitting and displaying the first video signal through the determined transmission route.

In the above configuration, step f-1) determines whether the first video signal is an analog video signal or a digital video signal.

In the above configuration, in step f-2, when the first video signal is an analog video signal, after performing analog-to-digital conversion, the converted video signal is displayed through the thin film transistor-liquid crystal display.

In the above configuration, in step f-2, when the first image signal is a digital image signal, the first image signal is directly displayed through a corresponding thin film transistor-liquid crystal display device.

(Example)

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic structural diagram of a video wall system utilizing a wireless network according to an embodiment of the present invention.

As shown in FIG. 3, the system includes a plurality of video signals output from the plurality of video output apparatuses 300 (hereinafter, referred to as 'first video signals') and control signals transmitted from the control terminal 400. A wireless transmission apparatus 100 which receives the received signal and converts it into a wireless signal; A display device 200 for receiving the radio signal transmitted from the radio transmission apparatus 100 and displaying a corresponding image according to the radio signal; And an audio processing apparatus 500 for receiving and processing an audio signal according to the first video signal.

The video output device 300 is not only a device fixedly arranged at a specific place such as a TV, a desktop PC, a DVD, and a VCR, but also a portable device such as a PDA and a PMP, which is portable and outputs a predetermined video signal. Various types of devices such as terminals are applicable.

The wireless transmission apparatus 100 may compress a first image signal input from a plurality of image output apparatuses 300 according to the control signal by using an MPEG method (hereinafter, 'second image signal'). And converts the converted second video signal and control signal into a UWB (Ultra Wide Band) wireless signal for transmission.

For this operation, as shown in FIG. 4, the apparatus 100 for transmitting wirelessly transmits each first image signal input from the plurality of image output apparatuses 300 to MPEG-2 / 4. A video encoder for converting the second video signal into a second video signal and compressing the second video signal by assigning a unique channel number to the second video signal; A wireless transmitter 120 for wirelessly transmitting the second video signal assigned the unique channel number and the control signal to the UWB-type wireless signal and wirelessly transmitting the antenna 140; And a first system controller 130 for controlling the operation of the wireless transmitter 120 according to the control signal input from the control terminal 400.

Herein, the wireless transmitter 120 converts the plurality of second video signals and the control signals into UWB wireless signals, and includes a multiple band OFDM alliance (MBOA) and a direct sequence code (DS-CDMA). The MAC protocol is implemented to allow multiple access with various types of UWB devices such as Division Multiple Access. For reference, the wireless transmitter 120 implements the transmission distance of the wireless signal converted by the UWB method to 20m or more, the wireless transmission speed is 400Mbps or more, the wireless transmission power is -42dBm or less, the wireless reception sensitivity is -80dBm or more It is desirable to.

On the other hand, the control signal provided from the control terminal 400 is transmitted and received in a serial communication, that is, RS-232C method in a wired section, the wired section is implemented via an RS-232C cable.

As shown in FIG. 5, the display apparatus 200 includes a plurality of unit cells Cell and A including a thin film transistor-liquid crystal display device (TFT-LCD, 230). Receives the second video signal and the control signal transmitted from the 100, and includes the received second video signal in the corresponding unit cell (A) of the plurality of unit cells (A) according to the received control signal The display is displayed on the thin film transistor-liquid crystal display device 230.

Each unit cell A constituting the display apparatus 200 receives a plurality of second image signals and control signals transmitted from the wireless transmission apparatus 100, and receives the received second image signals. A wireless receiver 210 converting and outputting the first image signal; A control board 220 selectively outputting the first video signal according to the control signal received through the wireless receiving device 210; And the thin film transistor-liquid crystal display device 230 which receives the first image signal output through the control board 220 and displays a screen according thereto.

As shown in FIG. 6, the wireless receiving apparatus 210 includes a wireless receiving unit 211 for receiving the plurality of second image signals and control signals assigned with a unique channel number through a separate antenna 214; A video decoder (212) which decodes a specific second video signal of the plurality of second video signals received through the wireless receiver 211, converts the first video signal into a first video signal, and outputs the first video signal; And a second system controller 213 for receiving the control signal and controlling the operations of the wireless receiver 211 and the video decoder 212. Here, the wireless receiver 211 has the same structure as the wireless transmitter 120 and includes various types of UWB devices such as Multiple Band OFDM Alliance (MBOA) and Direct Sequence-Code Division Multiple Access (DS-CDMA). Implement the MAC protocol to allow multiple access of multiple nodes. The video decoder 212 enlarges, reduces, and divides the second video signal in a decoding process through selective operation control of the second system controller 213, and converts the second video signal into the first video signal. .

As illustrated in FIG. 7, the control board 220 performs an analog-to-digital converter 221 for digitally converting an analog video signal included in a first video signal received from the wireless receiver 210. ); A switching unit 222 for selectively transmitting the digital image signal included in the output signal of the analog-to-digital converter 221 and the first image signal received from the wireless receiver 210 to the thin film transistor liquid crystal display device. ); And a third control system 223 for controlling the operations of the analog-digital converter 221 and the switching unit 222 according to the control signal. And a storage device 224 for double buffering of the first image signal.

Hereinafter, a video wall system operating method using a wireless network according to an embodiment of the present invention will be described with reference to FIG. 8. 8 is a flowchart illustrating a method of operating a video wall system using a wireless network according to an embodiment of the present invention.

First, the wireless transmission apparatus 100 receives the first image signal transmitted from the plurality of image output devices 300 and the control signal transmitted from the control terminal 400 (S110). That is, the first video signal is received through the wireless transmission device 100 video cable or the AV cable, and the control signal is received from the control terminal 400 through the RS-232C cable.

Next, the wireless transmitting apparatus 100 compresses each of the first video signals in a predetermined manner to convert the first video signal into a second video signal, and assigns a unique channel number to each of the converted second video signals (S120). ). That is, the wireless transmission apparatus 100 compresses each of the first image signals input from the plurality of image output apparatuses 300 through the video encoder 110 in the MPEG-2 / 4 scheme to the second. A video signal is converted into a video signal, and a unique channel number is assigned to each converted second video signal and output.

Then, the wireless transmitter converts the second video signal and the control signal to which the unique channel number is assigned, into a UWB-type wireless signal, and outputs the same through the antenna 140 (S130).

Thereafter, the plurality of unit cells A constituting the display apparatus 200 receive the plurality of second image signals and the control signals transmitted from the wireless transmitting apparatus 100 (S140). That is, each unit cell A constituting the display apparatus 200 receives both the second image signal and the control signal wirelessly transmitted through the wireless receiving apparatus 210.

Then, each unit cell A converts a second video signal having a specific channel among the plurality of second video signals into a first video signal (S150). That is, the wireless reception apparatus 210 may determine a channel number corresponding to itself among the plurality of second image signals having a unique channel through the video decoder 212 based on the control signal received from the wireless transmission apparatus 100. Only the second video signal is decoded and converted into the first video signal. Meanwhile, the wireless reception device 210 enlarges, reduces, and divides the second video signal of the corresponding channel number into the first video signal through the video decoder 212 as needed by the control signal.

Finally, each unit cell A displays the first image signal converted according to the control signal (S160). That is, the control board 220 determines whether the converted first video signal is an analog video signal or a digital video signal, and when the first video signal is an analog video signal, through the analog-to-digital converter 221. Analog-to-digital conversion is performed, and the converted first image signal is transferred to the thin film transistor-liquid crystal display 230 through the switching unit 222 for display. Meanwhile, when the first image signal is a digital image signal, the first image signal is transferred to the corresponding thin film transistor liquid crystal display device directly through the switching unit 222 for display.

As can be seen from the above, in the video wall system utilizing the wireless network according to the present invention, a video signal output device and a display device are connected to a video signal using a UWB (Ultra Wide Band) wireless network instead of a wire. And by transmitting and receiving a control signal, there is no restriction on the installation, it is possible to freely install in a variety of positions according to the individual doctor, such as the pillar or ceiling, as well as the wall surface which is a typical installation position,

In addition, the present invention includes a UWB-type wireless receiver in each unit cell constituting the display device, thereby halving the internal wiring for image signal transmission and control signal transmission of the display device. It is possible to configure a large screen of super power saving type.

In addition, the present invention is not only a device fixedly arranged in a specific place such as a TV, a desktop PC, a DVD, and a VCR, but also a variety of forms, such as a PDA and a PMP, which are easily portable and output a predetermined video signal. As the device is applied, it is possible to create a new concept of additional service.

Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (19)

According to a control signal input from a separate control device, a first video signal input from a plurality of video output devices is compressed in a predetermined manner to convert to a second video signal, and a unique channel number in the converted second video signal A wireless transmitting device which transmits the wirelessly with the control signal by applying a; And Comprising a plurality of unit cells (Cell) including a thin film transistor-liquid crystal display (TFT-LCD), and receives the radio signal transmitted from the wireless transmission device to correspond to the unique channel number of the plurality of unit cells And a display device for driving the specific unit cell according to the control signal to display the second image signal through the thin film transistor-liquid crystal display device. The wireless transmission apparatus compresses each first video signal input from the plurality of video output devices in the predetermined manner to convert the first video signal into the second video signal, and assigns a unique channel number to the converted second video signal. A video encoder for assigning and outputting the video encoder; A wireless transmitter which converts each of the second image signal and the control signal assigned with the unique channel number into a wireless signal and wirelessly transmits through an antenna provided; And And a first system controller configured to control the operation of the wireless transmitter in response to the control signal input from the separate control apparatus. The system of claim 1, wherein the system is And a sound processing device for receiving and processing an audio signal corresponding to the first video signal input from the plurality of video output devices. delete The method of claim 1, wherein the video encoder, The video wall system utilizing the wireless network, characterized in that for compressing each of the input first video signal in an MPEG (MPEG) method to convert to the second video signal. The wireless transmitter of claim 1, And converting the second video signal and the control signal into the wireless signal of a UWB (Ultra Wide Band) method. The method of claim 1, wherein each unit cell, A wireless reception device configured to receive a plurality of second video signals and control signals transmitted from the wireless transmission device, convert the received second video signal into the first video signal, and output the converted first video signal; A control board for selectively outputting the first image signal according to the control signal received through the wireless receiving device; And And the thin film transistor-liquid crystal display device which receives the first image signal output through the control board and displays a screen according to the first image signal. The wireless receiver of claim 6, A wireless receiver configured to receive the plurality of second image signals and control signals assigned with unique channel numbers through separate antennas; A video decoder configured to decode a second video signal having a specific unique channel number among the plurality of second video signals received through the wireless receiver, convert the second video signal into a first video signal, and output the first video signal; And And a second system controller configured to receive the control signal and to control operations of the wireless receiver and the video decoder. The method of claim 7, wherein the video decoder, The video wall system using the wireless network, characterized in that for expanding, reducing, and dividing the specific second video signal into the first video signal through selective operation control of the second system controller. The method of claim 6 or 7, wherein the control board, An analog-to-digital converter configured to perform digital conversion on the analog video signal included in the first video signal received from the wireless receiver; A switching unit for selectively transferring the output signal of the analog-digital conversion unit and the digital image signal included in the first image signal received from the wireless receiving device to the thin film transistor-liquid crystal display device; And And a third control system configured to control the operation of the analog-digital converter and the switching unit according to the control signal. The image output apparatus of claim 1, A video wall system using a wireless network, characterized in that the device for outputting a video signal including at least one of a PC, DVD, VCR, camera, TV, PDA, and PMP. a) receiving, by the wireless transmitting apparatus, a first image signal transmitted from a plurality of image output apparatuses and a control signal transmitted from a separate control apparatus; b) the wireless transmitting apparatus compresses each of the first image signals in a predetermined manner and converts the first image signal into a second image signal, and uniquely corresponding to each unit cell constituting a display device in the converted second image signal. Assigning a channel number; c) converting and outputting, by the wireless transmitting apparatus, the second video signal and the control signal to which the unique channel number is assigned, into a wireless signal; d) receiving, by a plurality of unit cells constituting the display device, the radio signal transmitted from the radio transmitter; e) converting each of the plurality of unit cells into a first image signal by converting a second image signal having a specific unique channel number among the plurality of second image signals; And f) each of the plurality of unit cells displaying the converted first image signal according to the control signal; In step e), each unit cell enlarges, reduces, and divides the second video signal according to the control signal to convert the second video signal into the first video signal. Operating method. The method of claim 11, wherein b), And transmitting the first video signal by MPEG using the wireless transmission device and converting the first video signal into the second video signal. The method of claim 11, wherein step c) And transmitting the second video signal and the control signal into the wireless signal of a UWB (Ultra Wide Band) scheme by the wireless transmitting apparatus. The method of claim 11, wherein step e) Decoding only the second video signal given the unique channel number mapped to itself among the plurality of second video signals each having a unique channel according to the control signal received from the wireless transmitting apparatus. And converting the video signal into the first video signal. delete The method of claim 11, wherein f) is, f-1) identifying signal components of the first video signal; And f-2) determining a transmission route of the first video signal according to the signal component of the first video signal, and transmitting and displaying the first video signal through the determined transmission route. How to operate a video wall system using a wireless network. The method of claim 16, wherein f-1) comprises: And determining whether the first video signal is an analog video signal or a digital video signal. 18. The method of claim 16 or 17, wherein f-2) comprises: And if the first video signal is an analog video signal, after performing analog-to-digital conversion, displaying the converted video signal through a corresponding thin film transistor-liquid crystal display. 18. The method of claim 16 or 17, wherein f-2) comprises: And when the first image signal is a digital image signal, directly displaying the first image signal through a corresponding thin film transistor-liquid crystal display device.

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