KR20040059521A - Electric bulletin board for processing image with variety characteristic and scaling - Google Patents

Abstract

PURPOSE: A high resolution electric bulletin board for performing various image source processing and scaling is provided to edit images by images type having different signal systems and to supply the high quality of image screen. CONSTITUTION: A high resolution electric bulletin board for performing various image source processing and scaling includes an image input block(1), a main image signal control block(11), a monitor block(17) and a display panel(30). The image input block(1) processes the analog and digital related image signals obtained from the image supplying member to an image data of a sequential scan method. The main image signal control block(11) performs the scaling of the image data outputted from the image input block(1) to be fully displayed on the screen. The monitor block(17) monitors the image data processed at the main image signal control block(11). And, the display panel(30) is consist of a plurality of light emission devices(LEDs) so as to display the image data in the form of image outputted from the image signal control block(11).

Description

Various image sources and scaling high-definition electronic display {ELECTRIC BULLETIN BOARD FOR PROCESSING IMAGE WITH VARIETY CHARACTERISTIC AND SCALING}

The present invention relates to an electric sign. In particular, the present invention relates to various image sources and scaling display boards for providing a high-quality image screen of a sequential scanning method by editing and processing each image having a different signal system.

In general, the electronic display board is composed of a combination of the brightness of each pixel based on the three primary colors of red, green, and blue, and the display device uses a light emitting diode such as a light emitting diode, a fluorescent lamp, or a discharge light. Recently, LCD is also used. Such an electronic signboard is installed outdoors to provide various people with the necessary information or advertisements with various graphics or videos.

Existing electronic signboards generally implement the above by converting analog video signals into digital video signals. In other words, the conventional television broadcasting signal is an analog video signal. In Korea, NTSC and other regions are composed of analog video signals such as PAL / SECAM. The video signal output from the video equipment was also an analog video signal. Therefore, the existing electronic board had to be converted to digital video signal in order to display the analog video signal. In addition, the inventor of the patent registration No. 252619 has been registered a technology for switching to a sequential scanning method using a double speed converter to improve the coarse screen and resolution of interlaced scanning due to NTSC method.

But in the future, digital video systems will be the mainstay. Reflecting this, in recent years, digital video systems such as high-definition HDTV and SDTV have been widely implemented. Therefore, in recent years, while accepting this high-definition digital video signal, there is an urgent need for a high-definition picture of the screen of the electronic display.

In addition, the recent TV broadcasting is using the NTSC (SECAM) method and digital broadcasting that defines the existing analog broadcasting system. However, the conventional display board only displays the digital video signal converted from the analog video signal, that is, the A / D conversion, and thus, the video signals of various digital broadcasts have not been directly processed in order to be displayed on the display board. The signal system of the digital video signal for broadcasting was different from the signal system of the digital video signal for display. Therefore, it was true that the image quality of the screen image displayed on the display board was degraded.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a variety of image sources and scaling display board for providing a high-quality image screen of the sequential scanning method by editing the image for different signal system. It is.

1 is a block diagram showing an entire system of various image sources and scaling display boards according to the present invention;

2 is a block diagram showing the structure of a display panel using the LED module according to the present invention as a display element;

3 is a block diagram showing the structure of a video input unit and a main video signal controller according to the present invention;

FIG. 4 is a block diagram showing a detailed structure of the main video signal controller in FIG. 3;

Fig. 5 is a block diagram showing the structure of the monitor unit in the present invention.

<Description of the symbols for the main parts of the drawings>

1: Video input unit 3: Video transmission equipment

5: PC graphic 7: Video input / double speed converter circuit

9: PC graphic input circuit unit 11: Main video signal control unit

13 input / output buffer 15 control computer

17 monitor unit 19 signal generator

21: Timing Generator 23: Double Frame Memory

25: 2nd Gamma Conversion / Line Driver 27: Display Controller

29 light emitting driving means 30 display panel

40: analog video signal input unit 41: the first double speed converter

43: A / D converter 50: digital video signal input unit

51: first equalizer / reclocker 53: serial-to-parallel converter

55: second double speed converter 60: high-definition digital video signal input unit

61: second equalizer / reclocker 63: formatter

65: 3rd speed converter 70: A / D converter

80: digital video interface 90: selector

100: A channel image processor 101: B channel image processor

103: micom 107: first buffer driver

109: second buffer driver 200: image processor

201: TMDS Transmitter 203: D / A Converter

105: timing control / fast switching interface

In order to achieve this, various image sources and a scaling-processing signboard of the present invention are a signboard for displaying an image obtained from an image supply means, and sequentially edit the analog and digital video signals obtained from the image supply means. A video input unit for processing the video data of the camera; A main video signal controller configured to scale the video data output from the video input unit to display a full screen; A monitor unit for monitoring whether image data processed by the main image signal controller is properly processed; And a display panel having a LED module as a display element installed at a remote site to display image data output from the main image signal controller as an image.

These and other features will be apparent from the following description with reference to the accompanying drawings.

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

FIG. 1 is a block diagram showing an overall system of various image sources and a scaled display board according to the present invention, and FIG. 2 is a block diagram showing the structure of a display panel using the LED module according to the present invention as a display element.

As shown in Fig. 1, the various image sources and the scaling-processing display board of the present invention (hereinafter referred to as "the display board of the present invention") include an image input unit 1. The video input unit 1 receives video signals from the video transmitting device 3 and the PC graphics 5.

The video transmitting device 3 includes all devices for transmitting analog video signals, digital video signals and high-definition digital video signals. The video transmitting equipment 3 includes, for example, a broadcasting device such as a broadcasting center or a relay satellite; CD player, VTR, DVD, camera, copy machine, scanner, cable TV and the like. As such, the image transmitting device 3 includes both wired and wireless devices for transmitting the above-described signals.

The PC graphic 5 is a video signal edited and processed by a personal computer (PC), which is screen data such as video and graphic characters by a PC. This PC graphic 5 is edited to display general text and / or graphic text-related news and / or advertisements, videos, and the like. The video signal of this PC graphic 5 includes both analog and digital video signals.

The image input unit 1 receives image signals from the image transmitting apparatus 3 and the PC graphic 5. This video signal is a video signal having a different signal system as described above. The video input unit 1 edits the video signal to be displayed on the display panel 30 to be described below. That is, the image input unit 1 processes image data of a sequential scanning method so that the analog and digital related image signals obtained are classified and edited and displayed on the display panel 30.

To this end, the video input / output unit 1 has a video input / double speed converter circuit section 7 and a PC graphics circuit section 9 built therein. Among them, the video input / speed converter circuit unit 7 sequentially processes an analog video signal, a digital video signal, or a high-quality digital video signal received from the video transmission device 3 so as to be easily displayed on the display panel 30. It converts into digital signal. In addition, the PC graphic circuit unit 9 serves to convert a video signal received from the PC graphic 5 into a digital signal so as to be displayed on the display panel 30.

The image data processed by the image input unit 1 is transmitted to the main image signal controller 11. The main video signal controller 11 scales the received video data so that the received video data is displayed in accordance with various conditions of the display panel 30. The processed image data is output to the input / output buffer 13 through the first gamma correction.

Furthermore, as will be described below, the main video signal controller 11 is composed of two channel image processors, and serves to adjust the full screen to be displayed on the display panel 30. That is, the video signal received and processed by the video input unit 1 is a full screen video signal. However, in the conventional electronic display board, the processing of this full-screen video signal was insufficient, and thus, the display panel 30 was cut out on the display panel 30. Accordingly, the main image signal controller 11 scales, ie, enlarges / reduces the image signal and the image data from the associated image input unit 1 in accordance with various conditions of the display panel 30 so that the image data is displayed on the display panel 30. It is displayed in full screen.

In addition, a control computer 15 is connected to the main video signal controller 11. The control computer 15 displays the video signal from the video transmitting apparatus 3 on the display panel 30 or displays, for example, a screen, an advertisement, or a game content from the PC graphics 5 on the display panel 30. It plays a role of judging whether to express. The control computer 15 sets gamma correction values for the image data processed by the main image signal controller 11 as described above, and processes / controls the display schedule for the display panel 30, brightness for day and night, and the like. Play a role.

In addition, a monitor 17 is connected to the main video signal controller 11. The monitor unit 17 monitors whether the image data processed by the main image signal controller 11 is processed and output in accordance with the general conditions of the display panel 30. To this end, the main video signal controller 11 outputs the same video data as the processed video data output to the buffer 13 to the monitor 17, and the monitor 17 receives the video data and receives the video data. Monitor the data. Therefore, the user can conveniently monitor the display situation of the display panel 30 installed at the remote place through the monitor unit 17, and based on this, the correction / editing of erroneous image data can be easily processed.

When sampling and sampling the video signal and converting it into a digital signal, all signals must be controlled by the timing signal synchronized with the video sync signal, so that stable screen display without distortion or vibration of the screen is generated. This is the signal generator 19 and the timing generator 21. The signal generator 19 and the timing generator 21 are described in detail in Patent Registration No. 252619, which has been registered by the inventor of the present invention, and the description thereof will be omitted. The signal generator 19 and the timing generator 21 are connected to the double frame memory 23 and the secondary gamma conversion / line driver 25 to perform the above-described purpose for the screen image displayed on the display panel 30. .

The double frame memory 23 stores one frame of image data, that is, screen data, to be displayed on the display panel 30, and reads and displays the image data upon display on the display panel 30. In general, the screen image displayed on the display panel 30 is displayed at a very high speed of 60 frames or more and is a large amount of data. Therefore, when a read / write is performed by one memory, rattle occurs and 60 or more frames are displayed. It was true that it was difficult to express. The double frame memory 23 is configured to implement a sequential scanning method of image data output from the buffer 13 by alternately performing frame memory and reading and writing alternately.

In addition, the general video equipment is designed to suit the light emission characteristics of the TV CRT, and when the screen image from the video equipment is displayed on the display panel 30, its color and luminance may be different. However, this is solved in the second gamma conversion / line driver 25 sequentially connected to the double frame memory 23 in the present invention. That is, the secondary gamma conversion / line driver 25 corrects a signal suitably for characteristics of a display device, for example, a light emitting diode, etc., and is connected to the display panel 30 to be remotely installed. Since it is located at the display part and has a considerable distance, it amplifies the signal and serves to reduce the loss in transmission to the display controller 27.

In addition, the display panel 30, which is generally installed outdoors, has a large matrix structure having an LED module as a display element (see FIG. 2). Therefore, since it is impossible to serially transmit the image data of the entire screen to the display panel 30, the image data must be divided and transmitted for each block of the display panel 30 for this reason. This role is played by the display controller 27. The display controller 27 divides the image data divided into a plurality of pieces of the display panel 30 into a display element of the display panel 30 for display of the screen. To this end, the display controller 27 includes a time generator and a field memory. The display controller 27 having this structure and function is described in detail in Patent Registration No. 252619, which has been registered by the inventor of the present invention, and description thereof will be omitted.

Reference numeral 29 denotes light emitting driving means for the display panel 30 using the LED module as the display element.

The display board of the present invention corresponds to the display panel 30 to display the image obtained through the system as described above. However, in order to achieve the object of the present invention in this system, it is important to process the acquired analog and digital related video signals having different signal systems to display on the display panel 30. The role of this process is left up to the video input unit 1. The image signal processed by the image input unit 1 must also be scaled to match the various display panels 30, which is the share of the main image signal controller 11. In addition, it is important to monitor whether the main image signal controller 11 has processed the image data in accordance with various conditions of the display panel, which is the responsibility of the monitor unit 17. Therefore, the electronic display panel of the present invention will be a main portion of the display panel 30 including the image input unit 1, the main image signal control unit 11 and the monitor unit 17 and the LED module for finally displaying the image. Hereinafter, the structure of the video input unit 1, the main video signal controller 11 and the monitor 17 will be described in detail for achieving the object of the present invention.

FIG. 3 is a block diagram showing the structure of the video input unit and the main video signal controller in the present invention, and FIG. 4 is a block diagram showing the detailed structure of the main video signal controller in FIG.

It has been described above that the image input unit 1 in the present invention includes a video input / speed converter 7 and a PC graphics circuit unit 9. Among these, the video input / speed converter 7 is roughly divided into an analog video signal input unit 40, a digital video signal input unit 50, and a high quality video signal input unit 60.

The analog video signal input unit 40 acquires and processes an existing analog video signal for TV broadcasting, that is, NTSC / PAL / SECAM, and includes a first double speed converter 41 and an A / D converter 43. . The first double speed converter 41 processes analog video signals and outputs high-quality red (R), green (G), and blue (B) composite video signals of a sequential scanning method. The first double speed converter 41 incorporates a high-precision copper screen detection circuit and a double speed processing unit. When they display NTSC-type scan players 525 lines (480 effective lines) on a large screen of TV or monitor, they show scan lines and improve problems such as line flicker and line clocking. Therefore, the first double speed converter 41 separates three-dimensional Y / C, interpolates the scan lines, converts them to data of a sequential scan method, and then increases the horizontal resolution to 800 lines of red (R), green (G), and blue. (B) Output a composite video signal.

In addition, the A / D converter 43 adjusts the level of the high-quality red (R), green (G), and blue (B) composite video signals, which are analog signals, through a preamp to a high-performance phase locked loop (PLL) circuit. In response to the clock generated, the red, green, and blue video signals are converted into digital video signals for display of the display panel 30 having 8 to 10 bits.

In addition, the digital video signal input unit 50 is a digital broadcast SDTV signal acquisition and processing, including a first equalizer / reclocker (Equalizer / Reclocker) (51), and also a deserializer (Deserializer) ( 53) and a second double speed converter (Deinterlacer) 55.

The first equalizer / reclocker 50 automatically adjusts the acquired digital video signal, that is, 259M serial digital data, and restores high performance clock and data.

The serial-to-parallel converter 53 serves to convert and generate a serial signal from the first equalizer / reclocker 50 into a 10-bit parallel digital video data and a synchronous clock.

Since the video signal primarily converted to the display panel 30 is an interlaced signal of 525 scan lines, the second double speed converter 55 converts the video signal from the serial-to-parallel converter 53 into a high-definition sequential scanning method. It converts to.

In addition, the high-definition digital video signal input unit 60 is a place for acquiring and processing a high-definition digital broadcast HDTV signal, and includes a second equalizer / reclocker 61, and also includes a deformatter 63 and And a triple speed converter (Deinterlacer) 65.

The second equalizer / reclocker 61 converts the acquired high-definition digital video signal, that is, SMPTE 292M component serial digital video signal, to adaptive cable equalization, restore clock and data, and convert serial data in parallel. It is responsible for generating bit data and sync clock.

The formatter 63 converts 20-bit HDTV parallel data from the second equalizer / reclocker 61 into Luma 10 bits and Chroma 10 bits.

The third double speed converter 65 converts the 1080i HDTV Y Cr / Cb signal output by the formatter 63 into a 1080P Y Cr / Cb signal of 30-bit progressive scanning.

As described above, the video input / speed converter circuit unit 7 receives all video signals for broadcast, that is, analog video signals, digital video signals, or high-quality digital video signals, so as to be displayed on the display panel 30 as the sequential scanning method. Convert. In addition, the video input / speed converter circuit unit 7 replaces only the input terminal PCB according to the video signal inputted as a multi bus type by using a PCB (printing board) connector with the main video signal control unit 11. It is supposed to be.

On the other hand, the PC graphics circuitry 9 includes an A / D converter 70 and a digital video interface 80.

The A / D converter 70 adjusts the level of the red, green, and blue component video signals obtained from the monitor connection port of the PC graphics card through the preamp, and is red, green, and blue by the clock generated by the high performance PLL circuit. A component video signal is converted into an 8 to 10 bit digital video signal, respectively.

In addition, the digital video interface 80 converts the TMDS digital video signal of the DVI 1.0 format obtained from the LCD monitor connection port of the PC graphics card (LCD graphic card) into 8 to 10 bits of red, green and blue video data. And outputs the sync signal and the dot clock in a 1 or 2 pixel / clock mode.

On the other hand, the selector 90 for selecting the video signal to be displayed on the display panel 30 is further connected to each of the video input / speed converter 7 and the PC graphics circuit 9.

The image data processed by the image input unit 1 having the structure as described above is output to the main image signal controller 11. As described above, the main video signal controller 11 scales the video data so that the video data is displayed in full screen in accordance with the general conditions of the display panel 30. That is, the main video signal controller 11 converts the video data output from the video input unit 1 into a signal corresponding to various sizes of the display panel 30, display elements and installation conditions.

In the figure, the main video signal controller 11 is provided with an A channel image processor (hereinafter referred to as "A processor") 100. The A processor 100 includes a scaler and a color / color space converter. Therefore, the A processor 100 is configured to display, for example, red, green, blue or Y Cb / Cr digital video data and related image data of the NTSC, SDTV, and HDTV from the image transmitting device 3 received from the image input unit 1. Restores the red, green, and blue primary color signals through a color space converter, and scales the output screen data to a predetermined aspect ratio (size), i.e., zooms in and out, then brightness, contrast ( By adjusting the contrast, hue, color, sharpness, and gamma, progressive scan data of 8 to 10 bits each for red, green, and blue for the display panel 30 is finally displayed. And a timing signal (progressive scan data / timming signal).

In addition, the main video signal controller 11 is provided with a B channel image processor (hereinafter referred to as "B processor") 101. The B processor 101 receives the red, green, and blue video signals of the VGA, XGA, SXGA, UXGA, and WUXGA resolutions and related image data received from a PC, and is the same as the A processor 100 as described above. The display panel 30 outputs progressive scan data and timing signals for display. In addition, the B processor 101 further includes a function of an On Screen Display (OSD) for displaying subtitles on the screen of the display panel 30.

The functions of the A and B processors 100 and 101 may be set in the control computer of the operating room. Functions of the A and B processors 100 and 101 set in the operating room are received by the MICOM 103 in the drawing, and the microcomputer 103 serves to control the A and B processors 100 and 101.

In addition, the main video signal controller 11 includes a timing control / high speed switching interface 105. This serves to prevent distortion of the screen during switching by receiving image data and timing signals from the A and B processors 100 and 101 in real time and synchronizing the timing of the A and B processors 100 and 101.

As described above, the video signal processed by the main video signal controller 11 is output to the input / output buffer 13 via the first buffer driver 107 and displayed on the display panel 30 as a full screen image. As a result, it is output to the monitor unit 17 through the second buffer driver 109. As described above, the monitor unit 17 receives the video signal from the main video signal controller 11 and monitors whether it is processed in accordance with various conditions of the display panel 30.

Fig. 5 is a block diagram showing the structure of the monitor unit in the present invention.

The monitor unit 17 receives an image data from the main image signal control unit 11 and converts the image data and the synchronization signal in accordance with the standard of the display panel 30 and the display confirmation monitor associated with the image processor 200 and And TMDS transmitter 201 for converting this image data and sync signal to 1 or 2 pixel / clock mode for display on LCD monitor, and D / converter for converting this video data and sync signal to analog video signal for display on CRT monitor. A converter 203 is included.

As described above, the present invention can display both analog and digital video images on the display panel in full screen. In addition, the present invention provides a convenience of selection and assembly because only the input terminal PCB is replaced according to the video signal input to the multi-bus type using the PCB connector. In addition, the present invention provides a high-definition screen image of a sequential scanning method capable of image scaling (enlargement / reduction) at a predetermined aspect ratio with respect to the actual screen image and the number of pixels of the display panel different.

As described above, the present invention has the effect of providing a high-definition video screen of the sequential scanning method and editing processing for each image having a different signal system.

Claims (3)

In the electronic display for displaying an image obtained from the image supply means, An image input unit for dividing and editing analog and digital image signals acquired from the image supply means and processing the image data in a sequential scan method; A main video signal controller configured to scale the video data output from the video input unit to display a full screen; A monitor unit for monitoring whether image data processed by the main image signal controller is properly processed; And And a display panel having a LED module as a display element installed at a remote location to display image data output from the main image signal controller as an image. According to claim 1, wherein the image input unit is composed of a video input / speed converter circuit unit for processing the image signals obtained from various video transmission equipment and a PC graphics circuit unit for processing the image signals obtained from the PC, The video input / speed converter circuit unit A first double speed converter for outputting red, green, and blue composite video signals with increased horizontal resolution by converting the acquired analog video signals into three-dimensional Y / C separated and scanning line interpolated signals. An analog video signal input unit comprising an A / D converter for converting a green and blue composite video signal into a digital video signal; Converting and generating a first equalizer / reclocker to automatically obtain the acquired digital video signal, reconstructing high performance clocks and data, and serial signals from the equalizer / reclocker into parallel digital video data and a synchronous clock. A digital video signal input unit comprising a serial / parallel converter and a second double speed converter for converting the interlaced video signal from the serial / parallel converter into a high quality sequential scanning method; And A second equalizer / reclocker for adaptive cable equalization, reconstructing clock and data, converting the serial data in parallel, and generating a synchronous clock, the second equalizer Deformatter for converting parallel data from the reclocker into luma and chroma signals, and a third double speed converter for converting the Y Cr / Cb signal from the deformatter into a Y Cr / Cb signal of sequential scanning. Including a high-definition digital video signal input unit is configured to replace only the input printed board according to the video signal input to the multi-bus type using the PCB (printing board) connector, and The PC graphics circuitry An A / D converter for adjusting the level of the red, green, and blue component video signals obtained from a PC and converting them into digital video signals; And A digital video interface for converting a digital video signal obtained from a PC into necessary video data and outputting the sync signal and a dot clock at 1 or 2 pixels / clock mode, And a selector for selecting an image signal to be displayed on the display panel is further connected to each of the video input / speed converter circuit unit and the PC graphic input circuit unit. The method of claim 1, The main video signal controller Restoring the image data related to the image signal from the image transmitting device output from the image input unit to the primary color, scaling the image to a predetermined specter ratio for the display panel, and adjusting the screen to output the progressive scan data and timing signals for displaying the display panel. A channel image processor for; Process the video signal related video data from the PC output from the video input unit in the same way as the A-channel image processor to output progressive scan data and timing signals for displaying the display panel and to display subtitles on the display panel. B channel image processor for; A timing control / high speed switching interface configured to receive data and timing signals from the A and B channel image processors to synchronize timing in real time to prevent distortion of the screen during switching; And Includes a MICOM (MICOM) for controlling the functions of the A and B channel image processor, The monitor unit An image processor for converting the image data from the main image signal controller into image data and a synchronization signal in accordance with the standard of the display confirmation monitor; A TMDS transmitter for converting the image data and the synchronization signal into 1 or 2 pixel / clock mode to be displayed on an LCD monitor; And And a D / A converter for converting the image data and the synchronization signal into an analog image signal so as to be displayed on a CRT monitor.