KR100746700B1 - System-on-chip based led signal processing apparatus - Google Patents

Abstract

An SOC(System On Chip) based LED(Light Emitting Diode) signal processing device is provided to make control devices for an image display system having plural LEDs as one board by embedding a data processing unit and an LED signal conversion unit in the board, thereby making the system simple and reducing the cost. An SOC based LED signal processing device(100) is connected to one or more LED display devices to output an image to the correspondent LED display device and produced in a board form. The SOC based LED signal processing device is composed of a data processing unit(110) disposed in a semiconductor to store map information indicating the screen form of the LED display device and perform signal processing for outputting image data processed in a PDP(Plasma Display Panel) or LCD(Liquid Crystal Display) screen form, into a PDP or LCD display device(200); an image correction unit correcting image data of the data processing unit correspondingly to the characteristic of an LED screen; a map conversion unit storing the corrected image data in a memory(183), reading the image data from the map information transmitted from the data processing unit, and converting map of the image data into a form of the LED screen; an LED signal processing unit(120) reading the image data to be displayed on the LED display device from the memory through the map conversion unit and generating an LED signal; and an output unit(160) for outputting the generated LED signal to the LED display device. The data processing unit, the image correction unit, the map conversion unit, the LED signal processing unit, and the output unit are embedded in the board.

Description

System-on-chip based LED signal processing device {SYSTEM-ON-CHIP BASED LED SIGNAL PROCESSING APPARATUS}

1 is a block diagram of a system-on-chip based LED signal processing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an LED signal conversion processing unit in FIG. 1. FIG.

3 is a brightness characteristic curve of an LCD display device;

4 is a brightness characteristic curve of the LED display device.

Fig. 5 shows a screen display form in an LCD display device such as an LCD monitor.

6 is an exemplary diagram showing a screen display form in an LED display device;

7 is an exemplary view of address map information according to the present invention.

FIG. 8 is a block diagram illustrating a configuration of an LED signal processing unit illustrated in FIG. 2.

9 and 10 are views for explaining the LED display control unit shown in FIG.

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

100: system-on-chip based LED signal processing device 110: data processing unit

120: LED signal conversion processing unit 121: image correction unit

122: map conversion unit 123: LED signal processing unit

123a: screen selector 123b: LED display control

123c: LED signal generator 124: output processor

125 detection unit 126 main unit

130: LED output port 140: audio input and output device

150: input unit 160: output unit

170: network port 180: storage

181: Romans 182: Ram

183: video memory 200: LED display

300: LCD monitor

The present invention relates to a system-on-chip based LED signal conversion processing apparatus, and more particularly, receives an LCD image signal from a system-on-chip and a system-on-chip, which are arranged in a semiconductor design to perform LCD image signal processing. The present invention relates to a system-on-chip based LED signal processing apparatus having an ASIC equipped with a function of converting a signal into a single board.

In general, an electronic display board or an electronic bulletin board is an electronic application display system for displaying various types of information in a visible still state or a moving picture state. These billboards are widely used for advertising commercials, stadiums, multi-vision, traffic signals, information and messages, the size and application system may vary depending on the intended use, object or location.

In other words, the commercial is used indoors or outdoors, or the color or dual color is mainly used, the stadium is applied to the main stadium or race track, soccer field, baseball field or swimming pool, the multi-vision is used for conference halls, small theaters, horse racing or vehicle loading The traffic signal is used for a railroad having a platform, a ticket gate, a waiting room and a passage, or a road including a city road, a highway, or an induction lamp.

The latest news from stock market and stock market boards, airports indicating arrival or departure, environmental information indicating environmental pollution, factories indicating production status, offices or electronic clocks and media. B) information and messages used for public relations and information transmission by the government or local governments.

In addition, such an electronic board can be roughly classified into a mobile type that can be mounted on a truck, a container, or the like for various events, and a block type that can be used as a substitute for a show or a multicube.

Currently, most electronic display system companies use industrial computers or industrial embedded to implement high-resolution LED displays, PDPs, and LCD displays, and use microcomputer boards to implement LED displays. have.

In the case of implementing an LED display using an industrial computer, since the signal is used by the VGA card or the DVI card of the computer, the digital display is converted to the LED signal through an image converter.

As a result, the image quality is damaged in the process of converting a VGA signal or a DVI signal into a digital signal through a computer and an image converter, and converts the LED signal through a computer, a VGA card or a DVI card, and an image converter. In the process, the image quality deteriorates, the system becomes complicated, the system becomes large, and the cost increases.

In addition, when implementing a small LED system using a microcomputer board, the resolution for controlling the module (16dot × 16dot) is limited, the color representation is monotonous, and communication does not support Ethernet.

The technical problem to be achieved by the present invention is caused by using an industrial computer or an industrial embedded when implementing a high-resolution LED display device as described above, and using a microcomputer board when implementing a small LED display device. To improve the overall problem that has been made.

According to an aspect of the present invention for achieving the technical problem, a device that can be connected to one or more LED display device to output an image to the LED display device in the form of a board, the system-on A semiconductor arrangement designed by a chip (SOC) to store map information indicating a screen format of the LED display device, and perform signal processing for outputting image data processed in a PDP or LCD screen format to a PDP or LCD display device. A data processor and a semiconductor arrangement designed to receive map information of the LED display device from the data processor and convert image data processed in the PDP or LCD screen format into an LED screen format through a map conversion based on the map information. It provides a system-on-chip based LED signal processing device including an LED signal conversion processing unit for outputting to the LED display device The.

Preferably, the LED signal conversion processing unit stores an image correction unit for performing image correction on the image data of the data processing unit according to the LED screen characteristics, and stores the corrected image data in a memory, and stores the map information received from the data processing unit. A map converting unit which reads the image data and performs a map conversion to an LED screen format, and an LED signal which reads the image data to be displayed on the LED display device from the memory through the map converting unit and generates an LED signal. A processing unit and an output processing unit for outputting the generated LED signal to the LED display device.

Preferably, the LED signal conversion processing unit may further include a detection unit detecting a horizontal line and a vertical height of an image to be displayed on the LED display device from the data processing unit.

Preferably, the LED signal processing unit selects a size and position of a screen to be displayed on the LED display device among the screens displayed on the PDP or LCD display device, and turns on the pixels constituting one frame of the selected screen. LED display control unit for processing the / OFF operation divided into a plurality of frames, and the LED signal generation unit for generating an LED signal corresponding to each frame processed by the LED display control unit.

Preferably, the LED display controller may be uniformly distributed over the entire frame, the time point of the ON operation of each pixel when divided into the plurality of frames.

Preferably, the output processing unit may include a bidirectional FIFO memory implemented corresponding to the corresponding LED display to output the LED signal generated by the LED signal processing unit to the LED display.

Preferably, the output processor may further include an amplifier for increasing a signal level in front of the bidirectional FIFO memory.

Preferably, the system-on-chip based LED signal processing apparatus further includes an audio input / output device for inputting and outputting an audio signal to the board, and the data processing unit processes the audio signal and transmits the audio input / output device and the audio signal. Can input and output

Preferably, the system-on-chip based LED signal processing apparatus may further include an input unit for transferring arbitrary data to the data processing unit to the board, and an output unit for outputting data from the data processing unit through an arbitrary network. .

Preferably, the system-on-chip based LED signal processing apparatus may further include at least one network port on the board for performing network communication through any communication protocol in the data processor.

Preferably, the system-on-chip based LED signal processing apparatus may further include a storage unit capable of electromagnetically recording or reading the data so as to input and output data to and from the data processing unit.

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

1 is a block diagram of a system-on-chip based LED signal processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the system-on-chip based LED signal processing apparatus 100 according to an embodiment of the present invention may be connected to one or more LED display devices 200 to advance to each LED display device 200. The set image is displayed and may be manufactured in a single board form.

One or more LED display devices 200 connected to the system-on-chip based LED signal processing device 100 each have an LED screen, and the LED screens are arranged with a number of LEDs, the LEDs of which 3 The primary colors of red (R), green (G), and blue (B) are arranged in a set, and a number of colors can be output by a combination of LEDs that emit light, thereby displaying a still image or a moving picture of a color state.

The system-on-chip based LED signal processing apparatus 100 includes a data processing unit 110 in which a semiconductor arrangement is designed as a system-on-chip (SOC) to display an image on one or more LED display devices 200 connected thereto; LED signal conversion processor 120, LED output port 130, audio input / output device 140, input unit 150, output unit 160, network port 170, It is configured by embedding the storage unit 180 in one board.

The board may be a printed circuit board having an electric pattern formed so that various components can be mounted and electrically connected. The board is designed to be robust and supported so that it can be mounted in the LED display device 200 or in a separate case and such materials are used.

The data processor 110 is a system-on-chip (SOC) semiconductor arrangement designed to perform digital signal processing and input / output of a PDP or LCD image signal.

System-on-a-chip (SOC) utilizes a variety of cores already designed and proven on one chip using ultra-high-density semiconductor design and manufacturing technology and design libraries that can integrate more than 20 million transistors in one chip. It is a semiconductor technology that can construct a system by embedding a core).

System-on-chip (SOC) uses reusable cores, greatly reducing the time to develop new systems, enabling low power, multifunction and miniaturization, and incorporating radio frequency (RF) and analog circuitry And by enabling the movable system to be configured, the LED signal processing apparatus 100 according to the present invention can be manufactured in a board form.

For example, the EM8621L model of SigmaDesign may be used as a system-on-chip of the data processor 110. The basic functions of EM8621L model are 166MHz ARM 4T, 166MHz DDR SDRAM, Video Decoder (RISC), Audio Decoder (DSP), Transport Demux (RISC), and 2D Graphic Accelator. It has various functions such as display driving device, external input / output device, audio input / output device, Mpeg2 display, etc., and it is SOC (System On Chip) with fast processing speed. In addition to these features, it is a system chip that uses various storage devices (CF, HDD, CD-ROM), and can reliably use storage devices and Ethernet by porting Linux.

The data processor 110 converts a digital image signal into an analog VGA signal for LCD or PDP and outputs the same to an LCD or PDP display device (not shown) connected to the output port 160.

In this case, the VGA signal output from the data processing unit 110 through the output port 160 may be image data having HD resolution.

Since the data processing unit 110 can be used in a PDP or LCD system as it supports HD-level VGA resolution, the SOC-based LED signal processing apparatus 100 according to the present invention is an airport guidance system, kiosk, video pay phone, bus. It can replace the controller implemented in the existing PDP or LCD system used in the information guidance system.

In addition, the data processing unit 110 outputs the LCD image signal to be output to the LED display device 200 as an arbitrary image screen through the LED signal conversion processing in the LED signal conversion processing unit 120 to the LED signal conversion processing unit 120. do.

At this time, the LCD image signal output from the data processing unit 110 is input to the LED signal conversion processing unit 120 to convert the LED signal and output the LCD image signal to the LED display device 200 to any image screen as an LED signal Various additional information necessary for the conversion process should be provided.

Therefore, the data processor 110 provides not only the LCD image signal but also various additional information necessary for converting the LCD image signal into an LED signal to the LED signal conversion processor 120.

For example, the LED display device 200 may have different operating characteristics depending on the manufacturer and the model. That is, the LED display device 200 differs in the number of data connector pins and the data order (RGB signal, clock, V-Sync, H-Sync) of the pin order and the pin order for each manufacturer, and with the maximum resolution supported. Therefore, such additional information is needed.

In addition, in order for the LED signal conversion processing unit 120 to convert the LCD image signal received from the data processing unit 110 into an LED signal, the LCD image signal output from the data processing unit 110 and the corresponding LCD display device 200 are displayed. Additional information such as address map information of the screen is required.

The address map information will be described in detail when describing the LED signal conversion processing unit 120.

The data processing unit 110 may store address map information of various LED display devices, or may store only address map information of any one model.

As the method of storing the address map information in the data processor 110, whenever an arbitrary LED display device is connected, the address map information of the corresponding LED display device may be downloaded and stored through the input port 150.

The LED signal conversion processing unit 120 is designed as a semiconductor arrangement as an application specific integrated circuit (ASIC), and the data processing unit 110 receives various specification information including map information along with the LCD image signal, and converts the corresponding LCD image signal through a map conversion. Is converted into an LED signal and output to the LED display device (200).

At this time, the LED signal conversion processing unit 120 receives the LCD image signal directly from the data processing unit 110 and converts it into an LED signal through a map conversion and at the same time the image quality of the display image of the installation environment of the LED display device 200 (indoor, Outdoor) and the LED specification (duty, chip type / lamp type, etc.) can be automatically displayed on the LED display device 200 with the most optimized image quality.

Accordingly, the LED signal conversion processing unit 120 may display the HD LCD resolution digital LCD image output from the data processing unit 110 on the LED display device 200, thereby displaying an HD high resolution screen in the LED display device. Can be expressed.

In this case, the LED signal conversion processing unit 120 receives the digital image signal directly from the data processing unit 110 and processes it. The digital image signal received by the LED signal conversion processing unit 120 from the data processing unit 110 may be converted into an LCD or PDP digital image signal processed for display of the LCD or PDP when the input signal is input to the data processing unit 110 and an arbitrary resolution. Branch may be a DVI signal.

To this end, the LED signal conversion processing unit 120 performs a signal conversion process for reconstructing the image data configured to match the LCD or PDP control, and the format of the DVI signal having an arbitrary resolution to match the LED screen format.

Accordingly, the LED signal conversion processor 120 may digitally receive a digital broadcast signal such as a satellite DMB, terrestrial DMB, or digital TV without a separate conversion device to express digital broadcast to the LED display system 200.

The LED output port 130 outputs the LED signal output from the LED signal conversion processing unit 120 to one or more LED display device 200.

The audio input / output device 140 is a device for inputting / outputting an audio signal such as a speaker or a microphone. The data processor 110 may process an audio signal and input / output an audio signal with the audio input / output device 140.

The input port 150 transfers arbitrary data to the data processor 110. An external multimedia device (not shown) may be connected through the input port 150 to receive source data. Data transmitted to the data processor 110 through the input port 150 includes map information of the LED display device.

The output port 160 is connected to an LCD display device such as an LCD monitor to output an LCD image signal output from the data processor 110 to the LCD monitor. For example, the VGA signal of HD resolution processed by the data processor 110 may be output to the LCD monitor through the output port 160.

The network ports 170 are network ports for performing network communication in the data processing unit 110 through any communication protocol. For example, it may be a LAN, RS 232, UART, expansion port, connector, or the like as shown. Also, although not shown, IEEE 1394 may also be applicable.

The data processor 110 may perform Ethernet communication through the network port 170 to receive and process various image data in real time, and output an LED signal for displaying an image on the LED display device 200.

In addition, a plurality of LED signal processing apparatus 100 can be connected and used through an expansion port, and various functions can be added.

In addition, the connector can be linked to any number of storage devices, such as a hard disk (HDD) or CF memory.

The storage unit 180 may electronically record or read the corresponding data to input / output data with the data processing unit 110.

The storage unit 180 includes a ROM 181, a RAM 182, and a video memory 183 required for the data processing of the data processing unit 110 and the operation of the LED signal conversion processing unit 120.

The video memory 183 stores the digital data of the data processing unit 110 after being signal processed by the LED signal conversion processing unit 120, and then controls the LED output port 130 under the control of the LED signal conversion processing unit 120. Through the LED display system 200 is output.

FIG. 2 is a block diagram illustrating an LED signal conversion processor shown in FIG. 1.

Referring to FIG. 2, the LED signal conversion processor 120 includes an image corrector 121, a map converter 122, an LED signal processor 123, an output processor 124, a detector 125, and a main unit 126. It may be configured to include.

The image corrector 121 receives the image data processed to fit the LCD screen from the data processor 110, changes the gamma correction to match the characteristics of the LED display device 200, and changes the overall brightness according to the brightness of the surrounding screen. Adjust The image data corrected by the image corrector 121 is temporarily stored in the video memory 183 of the storage unit 180 by the data storage operation of the map converter 122, and then in the order of addresses by the map information. Read and map conversion is performed.

3 and 4 are diagrams for describing a correction operation of the image correcting unit. FIG. 3 is a brightness characteristic curve of the LCD display and FIG. 4 is a brightness characteristic curve of the LED display.

3 and 4, it can be seen that the LCD display device and the LED display device have different characteristics of actual brightness of each material according to the absolute brightness value. Therefore, it is necessary to minimize the difference between the LCD display device and the LED display device to convert the image data values so that they can have the same color when viewed with the eyes so that they look like natural colors.

In addition, it is necessary to adjust the overall brightness, contrast, gamma, etc. according to the situation (ambient brightness and user demand). Therefore, when the image correction unit 121 receives the control value for image correction from the data processing unit 110 through the main unit 126, the image correction unit 121 performs image correction accordingly and outputs the color to the LCD monitor through the LED display device. To be displayed.

The image data corrected by the image corrector 121 is temporarily stored in the video memory 183. At this time, the image data stored in the video memory 183 has an LCD display format.

Therefore, the map converter 122 converts the image data having the gamma-corrected LCD display map address through the image corrector 121 into a map address form of the LED display device 200.

The map conversion unit 122 receives map information of the LED display device 200 from the data processing unit 110 through the main unit 126 for map conversion.

The map converter 122 receiving the map information of the LED display device 200 from the data processor 110 temporarily stores the image data corrected by the image corrector 121 in the video memory 183 and then uses the LED signal processor. In response to a request of 123, the stored image data is read and output to the LED signal processor 123 in the order of addresses set in the address map received from the data processor 110. Accordingly, the image data read out from the video memory 183 through the map converter 122 and output to the LED signal processor 123 has an LED display format. The map converting unit 122 stores the image data output from the image correcting unit 121 in the video memory 183, and reads the image data in the address order set in the address map received from the data processing unit 110 and has an LED display format. The process of outputting data is called map transformation.

5 to 7 are diagrams for explaining a map conversion in the map conversion unit, FIG. 5 shows a screen display form in an LCD display device such as an LCD monitor, and FIG. 6 shows a screen display form in an LED display device. 7 shows an example of address map information according to the present invention.

5 and 6, it can be seen that the screen display format for each pixel in the LCD display shown in FIG. 5 is different from the screen display format for each pixel in the LED display shown in FIG. 6. have.

That is, the LCD image signal output from the data processing unit 110 is processed in accordance with the screen display form of the LCD monitor. LCD video signals processed according to the LCD monitor's display format cannot be displayed on the LED display.

Therefore, it is necessary to process the LCD image signal processed in accordance with the screen display form of the LCD monitor in accordance with the screen display form of the LED display device.

One of the processes is a process of converting an address map of each pixel processed according to the screen display form of the LCD display into an address map of each pixel processed according to the screen display form of the LED display.

Meanwhile, the LED display device 200 may have a different screen display form for each model. Therefore, in order to convert the address map of each pixel processed according to the screen display form of the LCD display device into the address map of the pixel corresponding to the screen display form of the LED display device, the image address map of the LED display device is required.

Referring to FIG. 7, five types of address map information from A to E are shown. Here, each address map information shows address map information corresponding to models of five different LED display devices.

Looking at the address map information, it can be divided into two parts. That is, it can be divided into a portion (V_UADD [6.0]) indicating the vertical axis of the screen and a portion (V_LADD [8.0]) indicating the horizontal axis of the screen.

In the portion representing the vertical axis (V_UADD [6.0]), the numbers 0 to 6 represent the vertical axis addresses. A portion representing the horizontal axis (0 to 8 in V_LADD [8.0] represents a horizontal axis address).

7,2,1,0,12,11,10,9,8,6,5,4,3 in order from the left in A map information indicate the order of addresses to be read to generate the LED signal. . That is, the data of the corresponding address is sequentially read from 0 to 12 to generate the LED signal corresponding to the corresponding data.

The LED signal processing unit 123 is converted into the display format of the LED display device 200 by the map converter 122 to generate an LED signal for displaying an arbitrary image on the LED display device 200 from the read image data. do.

To this end, the LED signal processor 123 includes a screen setting unit 123a, an LED display controller 123b, and an LED signal generator 123c as shown in FIG.

The screen selector 123a selects the size and position of the screen to be displayed by the LED display device among the LCD images output to the LCD monitor, and requests corresponding image data to the map converter 122 to input corresponding image data. When the image data is output to the LED display controller 123b.

That is, in general, since the resolution of the LED screen is smaller than that of the LCD screen, the screen displayed on the LCD monitor may include a plurality of small windows that are displayed on one or more LED display devices. Therefore, it is necessary to select the size and position of the screen to be displayed on the actual LED display device among the entire LCD screen.

In this case, the screen selector 123a selects the size and position of the screen to be displayed on the LED display device by using the video horizontal line and the vertical height detected by the detector 125.

The LED display controller 123b adjusts the data output order of each pixel constituting the screen before outputting the portion captured as the screen to be displayed by the screen selector 123a to the LED display device.

In other words, unlike the LCD or PDP video display device, the LED display device can only be turned on or off. Therefore, the LED display device must display at least 256 times (8 bits) at the same time to display the same screen. I can display it. In addition, when the camera is taken in the ON / OFF mode, the screen may flicker when shooting with the camera (such as streaks or shaking when the camera monitor and TV screen are taken). It is necessary to adjust the output order of the data so that it can be taken.

9 and 10, when one screen is to be displayed on the LED display device, the display is divided into 256 frames in the ON / OFF operation for any pixel constituting the screen, and is expressed in any number of times. For example, ON operations performed by 2, 8, 128, and 254 may be equally distributed throughout the entire frame. Also, the display brightness is corrected by changing the displayed brightness according to the frame number.

Therefore, when the original image is 60 Hz when the original display 1 frame is to be displayed on the LED display device, the LED display controller 123b displays the display frequency of the LED display device as 15360 Hz (60 * 256). This eliminates streaks and vibrations even when the camera displays the screen displayed on the LED display.

The LED signal generator 123c generates an LED signal for driving each LED of the LED display device corresponding to the ON / OFF operation set by the LED display controller 123b. At this time, the LED signal generator 123c automatically adjusts the speed of the synchronization signal of the image data in order to smoothly display the display regardless of the screen resolution.

The output processor 124 converts the LED image data signal-processed by the LED signal processor 123 to meet various vendors and specifications and outputs them to the LED display device.

To this end, the output processor 124 includes a bidirectional FIFO memory corresponding to the specification of the LED display device. Therefore, the output processor 124 stores the LED image data output from the LED signal processor 123 in the bidirectional FIFO memory and outputs the LED image data to the LED display device.

In this case, the bidirectional FIFO memory may be designed according to the screen scanning method (STATIC, 1/16 DUTY, 1/8 DUTY, 1/4 DUTY) and display order of the LED display device.

That is, the LED image data signal-processed by the LED signal processing unit 123 is hardware-stored in the bidirectional FIFO of the output processing unit 124 provided to meet various vendors and specifications and then output in real time to the LED display device. will be.

Meanwhile, when the LED display device 200 is located at a long distance through a long cable, the output processor 124 amplifies the signal level before storing the LED image data in the bidirectional FIFO in consideration of data loss caused by the cable. It may include an amplification module.

The detection unit 125 inputs a data enable signal DE, a vertical synchronization signal V-SYNC, a horizontal synchronization signal H-SYNC, and a clock signal CLK among the specification information applied from the data processing unit 110. Receiving the video vertical height and the video horizontal line of the LED display 200 connected to the LED output port 130.

The video vertical height and the video horizontal line detected by the detector 125 are transmitted to the screen selector 123a of the LED signal processor 123 through the main unit 126, and the LED selector 123a is used by the screen selector 123a. 200 to capture the image to be displayed.

The main unit 126 distributes data exchanged between the data processor 110 and the LED signal conversion processor 120. The data processing unit 110 may apply various setting signals to the LED signal conversion processing unit 120 through the main unit 126 and provide map information. Here, the various setting signals may include contrast, brightness, etc. of the screen required for image correction by the LED signal conversion processing unit 120.

On the other hand, the LED signal conversion processing unit 120 provides the data processing unit 110 with a status confirmation signal indicating the operating state of the LED signal conversion processing unit 120 and the LED display device 200 through the main unit 126. The status check signal provided to the data processor 110 may be output to the LCD monitor through an output port or visually displayed through a separate display module (not shown).

It will be described the operation of the system-on-chip based LED signal processing apparatus according to an embodiment configured as described above.

First, the data processor 110 downloads specification information including address map information of the LED display device 200 through the input port 150 and stores the specification information in a memory (not shown) built in the data processor 110.

In the state where the specification information of the LED display device 200 is stored in the data processor 110, the data processor 110 outputs an LCD image signal to the LED signal conversion processor 120.

In addition, the data processing unit 110 transmits the specification information including the address map information of the stored LED display device 200 to the LED signal conversion processing unit 120.

The detection unit 125 of the LED display device 200 includes a data enable signal DE, a vertical synchronization signal V-SYNC, a horizontal synchronization signal H-SYNC, and a clock from among specification information applied from the data processing unit 110. The input signal CLK detects a video vertical height and a video horizontal line of the LED display device 200 connected to the LED output port 130.

The video vertical height and the video horizontal line detected by the detector 125 are transmitted to the screen selector 123a of the LED signal processor 123 through the main unit 126, and the LED selector 123a is used by the screen selector 123a. 200 to capture the image to be displayed.

The image correction unit 121 of the LED signal conversion processing unit 120 receives the image data processed to fit the LCD screen from the data processing unit 110 and changes it to match the characteristics of the LED display device 200 through gamma correction. Adjust the overall brightness according to the surrounding screen brightness.

In this case, when the image correction unit 121 receives the control value for image correction from the data processing unit 110 through the main unit 126, the image correction unit 121 performs image correction according to the color output to the LCD monitor even through the LED display device. To be displayed.

The image data corrected by the image corrector 121 is temporarily stored in the video memory 183. At this time, the image data stored in the video memory 183 has an LCD display format.

Therefore, the map converter 122 converts the image data having the gamma-corrected LCD display map address through the image corrector 121 into a map address form of the LED display device 200.

The map converter 122 receives map information of the LED display device 200 from the data processor 110 through the main unit 126 for map conversion.

The map converter 122 receiving the map information of the LED display device 200 from the data processor 110 temporarily stores the image data corrected by the image corrector 121 in the video memory 183 and then uses the LED signal processor. In response to a request of 123, the stored image data is read and output to the LED signal processor 123 in the order of addresses set in the address map received from the data processor 110. Accordingly, the image data read out from the video memory 183 through the map converter 122 and output to the LED signal processor 123 has an LED display format.

The LED signal processing unit 123 is converted into the display format of the LED display device 200 by the map converter 122 to generate an LED signal for displaying an arbitrary image on the LED display device 200 from the read image data. do.

The screen selector 123a of the LED signal processor 123 selects the size and position of the screen to be displayed by the LED display device among the LCD images output to the LCD monitor, and transmits the image data corresponding thereto to the map converter 122. When the video data is input by request, the video data is output to the LED display controller 123b.

In this case, the screen selector 123a selects the size and position of the screen to be displayed on the LED display device by using the video horizontal line and the vertical height detected by the detector 125.

The LED display controller 123b adjusts the data output order of each pixel constituting the screen before outputting the portion captured as the screen to be displayed by the screen selector 123a to the LED display device.

For example, when the LED display controller 123b wants to display a screen on the LED display device, the LED display controller 123b divides the display into 256 frames in an ON / OFF operation. The ON operation performed by the number of times (for example, 2, 8, 128, 254) is uniformly distributed throughout the entire frame. Also, the display brightness is corrected by changing the displayed brightness according to the frame number.

The LED signal generator 123c generates an LED signal for driving each LED of the LED display device in response to the ON / OFF operation set by the LED display controller 123b. At this time, the LED signal generator 123c automatically adjusts the speed of the synchronization signal of the image data in order to smoothly display the display regardless of the screen resolution.

When signal processing of the LED signal processor 123 is performed, the output processor 124 stores the LED image data output from the LED signal processor 123 in the bidirectional FIFO memory and outputs the LED image data to the LED display device 200.

In this case, when the LED display device 200 is located at a long distance through a long cable, the output processor 124 amplifies the signal level before storing the LED image data in the bidirectional FIFO in consideration of data loss caused by the cable. can do.

In addition, the LED signal conversion processing unit 120 provides the data processing unit 110 with a status confirmation signal indicating an operating state of the LED signal conversion processing unit 120 and the LED display device 200 through the main unit 126. The status check signal provided to the data processor 110 may be output to the LCD monitor through an output port or visually displayed through a separate display module (not shown).

The present invention is not limited to the above described embodiments, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

According to the present invention, a data processing unit which performs digital signal processing and input / output of a PDP or LCD image signal is designed as a semiconductor arrangement by a system-on-chip (SOC), embedded in a board, and map conversion of the digital image signal of the data processing unit is performed. The LED signal conversion processing unit converting the LED signal through the semiconductor arrangement is designed to be embedded on the board, so that a control device for a video display system having a plurality of LEDs can be manufactured in a single board form. Alternatively, the need for a DVI card or video conversion device can minimize the system, simplify the supply of high-quality video, and provide cost savings.

In addition, the LED signal conversion processor can be mounted on the board with an ASIC chip so that it can be mounted on the board with a small size and can be easily programmed and modified to perform a desired operation.

The apparatus may further include an audio input / output device for inputting and outputting an audio signal to the board, and the data processor may provide various audio advertising effects as well as image advertising effects to the image display system by processing various audio signals as well as image signals.

The apparatus further includes an input unit for transferring arbitrary data to the data processing unit and an output unit for outputting data from the data processing unit through an arbitrary network, thereby receiving various types of image data in various formats from the external data processing unit. By processing the signal and displaying it on the PDP or LCD display connected to the output, the board embedded video display control device is applied to the video display device that needs to process data of various data formats as well as the LED display system. Provide the effect of enabling it.

In addition, the board further includes at least one or more network ports for performing network communication through any communication protocol in the data processing unit, thereby inputting and outputting various data through communication such as LAN, Ethernet, RS 232, and IEEE 1394. It is possible to transmit and receive data through wireless as well as wired communication.

The apparatus further includes a data processing unit and a storage unit capable of electronically recording or reading the data so as to input and output data to and from the board, and store various types of image data even when the LED display device is installed alone at a remote place. It can be stored in the unit and expressed through the LED display device, and it can be useful for operating and restoring the LED display device by storing the operation record of the board and the operation record of the LED display device.

Claims (11)

Connected to one or more LED display device to output an image to the corresponding LED display device and can be manufactured in the form of a board, the board Designed as a semiconductor arrangement with a system-on-chip (SOC) to store map information indicating the screen format of the LED display device, and signal processing for outputting image data processed in the PDP or LCD screen format to the PDP or LCD display device. A data processing unit for performing An image correction unit which performs image correction on the image data of the data processing unit according to the characteristics of the LED screen; A map converter configured to store the corrected image data in a memory, read out the image data according to the map information received from the data processor, and perform map conversion into an LED screen format; An LED signal processor for generating an LED signal by reading image data to be displayed on the LED display device from the memory through the map converter; System-on-chip based LED signal processing device including an output processing unit for outputting the generated LED signal to the LED display. delete The method according to claim 1, And a detector configured to detect a horizontal line and a vertical height of an image to be displayed on the LED display from the data processor. The method of claim 1, wherein the LED signal processing unit A screen selection unit for selecting a size and a position of a screen to be displayed by the LED display device among the screens displayed on the PDP or LCD display device An LED display control unit for processing ON / OFF operations of pixels constituting one frame of the selected screen into a plurality of frames; And a LED signal generator for generating an LED signal corresponding to each frame processed by the LED display controller. The method of claim 4, wherein the LED display control unit, The system-on-chip based LED signal processing device of the time point of the ON operation of each pixel is uniformly distributed over the entire frame when divided into the plurality of frames. The method of claim 1, wherein the output processing unit And a bi-directional FIFO memory implemented corresponding to the LED display to output the LED signal generated by the LED signal processor to the LED display. The method according to claim 6, wherein the output processing unit, System-on-chip based LED signal processing device further comprises an amplifier for increasing the signal level in front of the bi-directional FIFO memory. The board of claim 1, wherein the board The apparatus further includes an audio input / output device for inputting and outputting an audio signal. And the data processor processes the audio signal and inputs and outputs the audio signal and the audio signal. The method according to claim 1 or 8, wherein the board An input unit for transferring arbitrary data to the data processing unit; System-on-chip based LED signal processing device further comprising an output unit for outputting data from the data processing unit through any network. The method according to claim 1 or 8, wherein the board And at least one network port for performing network communication through any communication protocol in the data processor. The method according to claim 1 or 8, wherein the board System-on-chip based LED signal processing device further comprises a storage unit for recording or reading the corresponding data electromagnetically so as to input and output data with the data processing unit.

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