KR102494620B1 - LED Signboard and Driving Method Thereof - Google Patents

Abstract

The present invention is an LED electric display board and a method of driving the electric display board. The LED electric display board according to an embodiment of the present invention comprises: a plurality of SCU units each extracting image data of different areas under its jurisdiction from unit video frames provided externally; and a plurality of driver board units which receive (pre)extracted image data from different areas and provide them to a plurality of pre-connected LED modules to implement images of unit video frames on the screen, and is composed of multiple LED modules, multiple drive board units, and multiple SCU units. One LED module, one drive board unit, one drive board part, and one SCU part can be integrated to form one integrated LED module device. Accordingly, the present invention can overcome existing data transmission problems and cost increase problems.

Description

LED signboard and its driving method {LED Signboard and Driving Method Thereof}

The present invention is an LED signboard and a driving method of the signboard, and more specifically, an LED module, an SCU card, and a drive board are configured as one integral unit, so that one SCU card is one LED module (eg: 256 pixel × 256 pixel) It relates to an LED display board operating in a manner of controlling and a driving method of the display board.

In general, multi-display devices using a plurality of LED modules are installed in various indoor and outdoor exhibitions, concert halls, and stadiums to serve to provide various image information. A display device using such an LED module is connected and installed in a state in which a plurality of LED modules are regularly arranged in horizontal and vertical directions in order to implement a large screen. A multi-display device using these LED modules may be used as a single LED module as a whole, each LED module may be used independently, or several LED modules may be bundled together and used as a single LED module. A variety of dramatic and beautiful images may be provided.

Since the multi-display device is operated by an external power source, many switching mode power supplies (SMPS) are provided to stably operate the multi-display device. The stability of the power supply is improved by adopting a power supply method called SMPS for the external AC voltage controlled by the controller.

However, in the conventional method using a plurality of LED modules, the LED module and the SCU card providing data to the LED module are configured in a separate form. As a result, several LED modules are controlled by the SCU card, so if a problem occurs in the SCU card, a problem occurs in data transmission such as screen off or noise in the connected module.

In addition, it is necessary to control the LED module as much as the resolution that the SCU card supports (eg, if it supports 256 × 256 pixels), but due to the nature of the module, it does not support 100% of the resolution that the SCU card has. Failure to do so results in cost increases.

For example, module manufacturing is not manufactured according to a specific standard or standard. For example, if the module is manufactured in a wide type with a size of 256 × 200 pixels, vertical resolution pixel loss occurs when a display is configured by combining several modules. do.

In addition, since several drive boards are mounted on the LED module, the speed and amount of packets transmitted from the SCU are limited.

Korean Registered Patent Publication No. 10-1892289 (2018.08.21) Korea Patent Registration No. 10-1954713 (2019.02.27)

An embodiment of the present invention consists of an LED module, an SCU card, and a drive board as one integral unit and operates in a manner in which one SCU card controls one LED module (eg, 256 pixel × 256 pixel), and its Its purpose is to provide a driving method for an electric display board.

An LED display board according to an embodiment of the present invention includes a plurality of SCU (Switch Control Unit) units each extracting image data of different regions under its jurisdiction from a unit video frame provided from the outside, and and a plurality of driver board units that receive image data and provide them to a plurality of pre-connected LED modules to realize images of the unit video frames on a screen, wherein the plurality of LED modules and the plurality of drive board units And composed of a plurality of SCU units, one LED module, one drive board unit and one SCU unit are integrated to form one integrated LED module device.

One side of each of the drive board parts may be coupled to each of the LED modules, and the other side of each of the drive board parts may be coupled to each of the SCU units to form an integral body.

The LED module, the drive board unit, and the SCU unit may be combined in a 1:1:1 ratio and configured in a plurality of equal numbers.

The plurality of LED modules are manufactured to have horizontal and vertical resolutions of 256 × 256 pixels so that one character of Hangul can be expressed on 16 × 16 pixels, and can operate in combination with each other.

Each drive board unit and each SCU unit integrally coupled on each of the LED modules can process image data of 256 × 256 pixels horizontally and vertically in accordance with their jurisdictional area in the input image data.

When the LED module, the drive board part, and the SCU part are coupled in a 1:1:1 ratio, they may be combined by securing a separation space for heat dissipation.

In addition, the driving method of the LED signboard according to an embodiment of the present invention is composed of a plurality of LED modules, a plurality of drive board parts, and a plurality of SCU parts, and one LED module, one drive board part, and one SCU part are integrated. As a driving method of an LED display board constituting one integrated LED module device, the plurality of SCU units extracting image data of different areas under their control from unit video frames provided from the outside, respectively, and the plurality of SCU units. A drive board of the unit receives the extracted different image data and provides them to a plurality of pre-connected LED modules, so that the image of the unit video frame is implemented on a screen.

According to an embodiment of the present invention, an LED module, a drive (board) that drives the LED module, and an SCU card that provides image data to the drive board are integrally formed to process the resolution of the same pixel size, such as an electronic signboard. Configuration of the display may be easy.

In addition, the embodiment of the present invention can overcome the existing data transmission problem, cost increase problem, content speed and packet amount limitation problem by configuring the processing resolution of the LED module, the drive board and the SCU card to be the same. There will be.

1 is a block diagram illustrating the detailed structure of an LED signboard according to an embodiment of the present invention;
2 is a view for explaining an LED module constituting the LED display panel of FIG. 1;
3 is a view showing that the LED module, the drive board and the SCU card of FIG. 2 are integrally configured; and
4 is a flowchart illustrating a driving process of the LED display board of FIG. 1 .

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

1 is a block diagram illustrating a detailed structure of an LED signboard according to an embodiment of the present invention.

As shown in FIG. 1, the LED display board 90 according to an embodiment of the present invention includes an interface unit 100, a controller 110, an SCU (unit) 120, a power voltage generator 130, and a scan driver. 141, the data driver 143, the LED display panel (sub) 150, and a part or all of the discharge performing unit 160.

Here, "including part or all" means that some components such as the interface unit 100 or the discharge performing unit 160 are omitted to configure the LED display board 90 or some components such as the scan driver 141 It means that the element can be integrated with other components such as the data driver 143, and will be described as including all of them to help a sufficient understanding of the present invention.

First, the interface unit 100 is a video board such as a graphic card, and converts image data input from an external device such as a set-top box (STB) to the resolution of the LED display board 90 or the LED display panel 150. It can play the role of converting and outputting it. Here, the image data may consist of, for example, R, G, and B video data of 8 bits or more, and the interface unit 100 generates a clock signal (DCLK) suitable for the resolution of the LED display board (90) and a vertical/horizontal synchronization signal (Vsync). , Hsync) and the like are generated. Afterwards, the interface unit 100 provides vertical/horizontal synchronization signals and image data to the controller 110 . For example, the interface unit 100 or the controller 110 according to an embodiment of the present invention may convert image data provided from the set-top box to provide a series of image video frames having a resolution of 1024 × 1024 pixels.

In addition, the interface unit 100 includes a tuner for receiving a specific broadcast program provided by an external broadcasting station, a demodulator for demodulating a video signal input through the tuner, and a demultiplexer for separating the demodulated video signal into video/audio data and additional information. , a decoding unit for decoding the separated video/audio data, and an audio processing unit for converting the decoded audio data into a format suitable for a speaker.

The controller 110 may include a CPU or an MPU, and may be configured as a timing controller. The controller 110 generates control signals for controlling the scan driver 141 and the data driver 143 to display the input RGB image data on the LED display panel 150 . In addition, the controller 110 may express grayscale information of R, G, and B data using the logic voltage Vlog provided from the power voltage generator 130 . For example, when gray level information of R is generated using a logic voltage of 3.3V, 8-bit information '10001001' can be generated by expressing 3.3V as 1 and OV as 0.

The controller 110 uses a gate control signal for controlling the scan driver 141, such as a gate shift clock (GSC), a gate output enable (GOE), and a gate start pulse (GSP). ), etc. can occur. Here, GSC is a signal that determines the on/off time of a switching element connected to a light emitting element such as R, G, B LED (or OLED), and GOE is a signal that controls the output of the scan driver 141. signal, and GSP may correspond to a signal indicating the first driving line of the screen among one vertical synchronization signal.

In addition, the controller 110 may generate a source sampling clock (SSC), a source output enable (SOE), a source start pulse (SSP), and the like as data control signals. Here, the SSC is used as a sampling clock for latching data in the data driver 143, and the SOE transfers data latched by the SSC to the display panel 240. SSP is a signal notifying the start of data latch or sampling during one horizontal synchronization period.

More specifically, if the data driver 143 is composed of, for example, Texas Instruments TCL 5958 series IC, the controller 110 according to an embodiment of the present invention includes the corresponding IC, data signal, and S CLK (serial data shift clock), LAT, and G CLK (Grayscale (GS) pulse width modulation (PWM) reference clock). Here, the data signal is grayscale data of R, G, and B. In addition, S CLK is a signal for shifting data input to the data driver 143 to a shift register (ex. 48-bit common shift register, MSB) by synchronizing the rising edge of S CLK. Data stored in the shift register is shifted MSB on each S CLK rising edge. Also, LAT is a signal for latching data from MSB to memory (ex. GS data memory) on the falling edge. And, G CLK is a signal for increasing the GS counter by one at each G CLK rising edge for PWM control. Since the above various signals can be changed as much as possible, the embodiments of the present invention will not be particularly limited to the above contents.

Based on the above, the controller 110 may include a control signal generator (not shown) and a data rearrangement unit (not shown). Here, assuming that the time required to display the image of the unit frame on the LED display panel 150 is 16.7 ms, the control signal generation unit generates the control signal so that the image of the unit frame can be displayed within the corresponding time. In addition, the data reordering unit may reprocess input RGB image data to be suitable for the LED display panel 150 . For example, an operation of converting 8-bit data into 64-bit data may be performed.

Although the SCU 120 may be integrally configured in the controller 110, each unit LED module provides image data for the corrected luminance pixel image transmitted through the controller 110. In other words, the LED display panel 150 of FIG. 1 may be composed of a plurality of LED modules, and therefore, the SCU 120 determines the (pixel) coordinates of the LED module under its jurisdiction in the video frame provided by the controller 110. It can be seen that image data corresponding to is extracted and provided to the data driver 143 . Although described in detail later, the LED display panel 150 according to an embodiment of the present invention may be configured by combining LED modules each supporting a resolution of 256 × 256 pixels in a square or rectangular shape. At this time, each LED module may be named a first LED module, a second LED module, and the like, and the SCU 120 extracts and provides image data provided to each LED module from input data. Here, extracting may be used as a meaning of generating.

For example, as shown in FIG. 1, when a video frame having a resolution of 1024 × 1024 is output from the controller 110 and the video frame of the same content is provided to each SCU 120, each SCU 120 In the video frame image, the split image corresponding to the region of jurisdiction of the user may be provided to the data driver 143 in charge of the video frame image. For example, suppose that a unit video frame of 1024 × 1024 is divided into 4 regions. In this case, the split image of the first region is extracted from the first SCU and provided to the pre-connected data driver (or first data driver) 143, and the split image of the second region is extracted from the second SCU and pre-connected. Data processing is performed in the form of being provided to the data driver 143, that is, the second data driver.

Of course, it is preferable that the SCU 120 according to the embodiment of the present invention is manufactured and used to process a resolution of the same size as that of each LED module under its jurisdiction. In other words, if the resolution of the LED module is manufactured to support a resolution of 200 × 200 pixels, the data driver 143 is of course the same, but in the case of the SCU 120, it is preferable to be manufactured and used to match the corresponding resolution. Therefore, it is preferable that the processing resolution of the SCU 120 matches the resolution of the LED module. In this case, even if a problem occurs in one SCU 120, the operation of other LED modules is not affected.

The power voltage generation unit 130 receives external commercial power, that is, an AC voltage of 110V or 220V, and generates and outputs DC voltages of various levels. For example, for the controller 110, a voltage of DC 3.3V can be generated and provided as a logic voltage to express gray levels, and for the scan driver 141, a voltage of DC 4.5V can be generated as a gate-on voltage (Vdd). Voltages of various sizes may be generated and provided. Of course, when the controller 110, the scan driver 141, and the data driver 143 are configured in the form of ICs, the Vcc voltage input to the ICs may be generated.

The scan driver 141 receives the gate on/off voltage (Vdd/Vss) provided from the power supply voltage generator 130 and applies the corresponding voltage to the LED display panel 150 under the control of the controller 110. . However, in the embodiment of the present invention, the gate-off voltage is designed as the ground voltage. The gate-on voltage Vdd is sequentially provided to the display panel 240 from scan line 1 (GL1) to scan line N (GLn) to implement a unit frame image. Of course, the scan driver 141 operates in response to the scan signal generated by the controller 110 according to an embodiment of the present invention. To this end, the scan driver 141 may include a power voltage source and a switching element connected to each scan line. Of course, a TFT element may be used as such a switching element, but a transistor (TR) and a MOSFET may also be used.

The data driver 143 converts video data of R, G, and B provided serially from the controller 110 into parallel, converting digital data into analog current or duty-on current (ex. pulse current). , and video data corresponding to one horizontal line can be simultaneously provided to the LED display panel 150 and sequentially for each horizontal line. According to an embodiment of the present invention, the data driver 143 converts video data in parallel and can simultaneously provide data to 256 data lines in order to implement pixels of 256 pixels simultaneously. It is to provide data simultaneously on one horizontal line made up of 256 lines. For example, digital information of video data provided from the controller 110 is converted into analog current capable of expressing color gradations and provided to the LED display panel 150 . Of course, the analog current may be a current in the form of a pulse. At this time, it is preferable that the data driver 143 also outputs unit frame data in synchronization with the gate signal provided to the scan driver 141 .

The configuration of the data driver 143 can be configured in various ways depending on whether the light emitting element, that is, the LED element is driven with a constant current or a constant voltage. For example, the data driver 143 may be a Texas Instruments TLC5958 series IC.

When the LED display panel 150 is composed of a plurality of LED modules, the data driver 143 according to an embodiment of the present invention operates to output divided images provided by the SCU 120 to each LED module. Therefore, as shown in FIG. 1, the data driver 143 may be configured in the form of a single IC chip to handle the operation of a plurality of LED modules, respectively, but in the embodiment of the present invention, the data driver 143 is physically separated from each other to provide a plurality of data It is preferable to be configured in a form having a driver 143. Accordingly, the first LED module may be connected to the first data driver, and the first SCU may be connected to the first data driver to be integrated into one unit. Accordingly, when one LED module, data driver, or SCU operates abnormally, a corresponding integrated device can be quickly replaced and a new device can be configured to quickly cope with the failure.

In the LED display panel 150, a plurality of scan lines and data lines are formed to define pixel areas that cross each other, and R, G, and B light emitting elements such as LEDs (or OLEDs) are formed in the intersecting pixel areas. do. After the power voltage is applied to each scan line of the LED display panel 150, when a current path is formed between the ground and the ground through the data driver 143, light is emitted through the data line connected to the corresponding scan line provided with the power voltage. The elements generate current corresponding to their own gradation information. The brightness of the LED display panel 150 according to the embodiment of the present invention is adjusted according to the amount of charge flowing through the current path, and an image is displayed. Of course, since the light emitting element can be driven by a constant voltage, the embodiment of the present invention will not be particularly limited to the above.

In summary, the LED electronic display board 90 according to an embodiment of the present invention includes a plurality of LED modules, that is, an LED display panel 150 including a light emitting unit and a plurality of LED modules constituting the LED display panel 150 for driving. It includes a peripheral circuit for Of course, in the embodiment of the present invention, an eco-friendly device, the LED, is exemplified, but it will not be particularly limited thereto. A plurality of LED modules may be configured by arranging and combining them in a matrix form. Here, the term "LED module" usually means an individual unit of LED light emitting part for assembly, but in addition to this, one or more printed circuit boards (PCBs) are combined with a (lower) cover to form a configuration, and the LED element It also refers to the LED light emitting part formed in various shapes such as being manufactured in the form of a chip formed on a PCB substrate in the process of a production line and coupled to the substrate. Therefore, in the embodiments of the present invention, the concepts of such terms will not be particularly limited. That is, a module may be understood as a light emitting unit of an individual unit that can be combined. However, in the embodiment of the present invention, since it is possible to divide and drive one large electronic display board into a plurality of areas, the combination of LED modules will not be particularly limited.

A plurality of LED light emitting units, that is, modules in a matrix form constituting the LED display panel 150 operate by receiving power for each line, such as a row or column. Normally, LED elements operate by receiving DC voltage, so the voltage provided may be slightly different depending on which color LED element is driven, and red (R), green (G), and blue (B) LEDs are operated as one Information or data of various colors can be implemented on the screen with pixels. Of course, since the LED element can be driven with constant voltage or constant current, it will not be particularly limited to any one form in the embodiment of the present invention. Since the LED element is a self-luminous element that emits light on its own without a backlight like LCD, it is possible to express gray directly according to the magnitude of the voltage, so pixel data is displayed on the screen by the voltage provided to the R, G, and B LED elements. It can be seen that it is implemented in the form of a video. Of course, the dimming control of the LED element may be performed by adjusting the application time of the applied voltage, that is, through PWM control.

The peripheral circuit unit typically includes a parallel power supply unit (SMPS) that implements pixels by providing voltages of different magnitudes to LED elements. Of course, the parallel power supply unit may be a modified form of the power supply voltage generator 130 or may be configured separately. The parallel power supply unit converts, for example, commercial power of AC 220V provided from the outside into DC, and adjusts the level, or size, of the converted DC voltage under the control of a power control monitoring unit or an integrated control device to determine the value of pixel data. It is expressed on the LED display panel 150. For example, if LED elements of G and B among R, G, and B constituting a pixel are turned off and only R is driven with the maximum voltage, the corresponding pixel is implemented as a red pixel. At this time, it can be seen that gradation is expressed by adjusting the intensity of the voltage applied to R. For example, the parallel power supply unit may be configured to divide a voltage of a designated level into a plurality of sizes by, for example, a resistor divider, and then select an appropriate divided voltage according to pixel data values and supply it to the LED element. Since the parallel power supply unit according to an embodiment of the present invention line drives a plurality of LED light emitting units, it is possible to provide a plurality of voltages in parallel. To this end, the parallel power supply unit (SMPS) may include a plurality of power supply units (eg, SMPS). Each power supply unit is responsible for power supplied to each line. Of course, power supplied to each line may be controlled by the control of the power control monitoring unit.

When each scan line of the LED display panel 150 is discharging, the discharge performer 160 discharges parasitic charges generated by the parasitic capacitor of each scan line to the ground. At this time, the discharge performer 160 may be controlled by the controller 110 . Of course, the control time is performed between the time when the power voltage Vdd provided to scan line 1 is cut off and the power voltage supplied to scan line 2 is supplied.

The discharge performing unit 160 performs a discharge operation on a plurality of scan lines formed on the LED display panel 150 . In other words, it creates a discharge path for each scan line. The discharge performing unit 160 according to an embodiment of the present invention performs a discharge operation by controlling one discharge line commonly connected to a plurality of scan lines in a sequential driving method. For example, the discharge performer 160 may perform a discharge operation under the control of the controller 110 to form a discharge path by connecting a specific scan line to the ground through a discharge resistor. Through this, all parasitic charges caused by parasitic capacitors formed on each scan line are discharged to the ground. Accordingly, in the sequential driving method, the controller 110 may provide the same type of control signal to the discharge performing unit 160 for each scan line through one control line.

The discharge performing unit 160 includes a switching element that operates on and off according to a control signal received from the controller 110, and may further include elements for stably performing a discharge operation. For example, a rectifying element for preventing reverse flow may be included between each scan line and a switching element connected to the ground. Additionally, resistors may be included to reduce EMI, noise, or peak current. This resistor may be connected to the cathode terminal of the diode and one terminal of the switching element, or may be connected between the switching element and the ground.

FIG. 2 is a view illustrating the overall configuration of an LED module constituting the LED display panel of FIG. 1, and FIG. 3 is a view showing an integrated LED module device in which the LED module, the drive board, and the SCU card of FIG. 2 are integrally configured. .

3, the (LED) drive board 203_1 includes peripheral circuits of the LED display panel 150 of FIG. 141), the data driver 143, and the discharge performing unit 160 may mean that at least one component is configured on a board, that is, a printed circuit board (PCB).

As shown in FIGS. 2 and 3 , the LED display panel 150 of FIG. 1 according to the embodiment of the present invention constitutes one display by combining a plurality of integrated LED module devices. In order to implement one unit video frame on the screen, it can be integrated and operated, but it is also possible to operate separately to implement video images with different content (eg, the first advertisement video and the second advertisement video, etc.) on the screen. Anything is possible. In other words, for example, when six LED modules are combined and configured, one advertisement image can be implemented in the corresponding six LED modules. However, in the case of separate driving, it is possible to implement different advertising images on the screen by separating the areas of the six LED modules. Therefore, in the embodiment of the present invention, it will not be particularly limited to integrated driving or separate driving.

Above all, it is preferable that the LED modules 200_1 to 200_N according to an embodiment of the present invention are formed in multiples of 16 × 16 pixels in width and length so as to express one character of Hangul. The resolution of 16 × 16 pixels is suitable for expressing one character of Hangul. Accordingly, each of the LED modules 200_1 and 200_N shown in FIG. 2 preferably has a horizontal and vertical resolution of 256 × 256 pixels. In the embodiment of the present invention, it is preferable that all LED modules 200_1 to 200_N constituting the LED display board 90 of FIG. 1 are manufactured and used to have the same resolution. For example, in the LED display panel 150 of FIG. 1 according to an embodiment of the present invention, as can be seen in FIG. It can be configured in the form of implementing an image of one unit video frame image through this. When three LED modules are provided in each column, a total of six LED modules are configured so that a landscape-to-length ratio can form a landscape, that is, a wide type. In the case of an electric sign board, the driving frequency is 30Hz ~ 60Hz, so in the case of 60Hz, 60 video frames per second are implemented on the screen to implement one content in 6 modules. Content images of different contents, such as commercials, can be implemented. Of course, in the case of such division driving, since the driving frequency can be operated differently, the embodiment of the present invention will not be particularly limited to any one form.

In the embodiment of the present invention, the LED driver board 203_1 in the form of a combination of a data driver or a scan driver responsible for realizing images of the LED modules 200_1 to 200_N may be configured for each LED module 200_1 to 200_N. In addition, on the corresponding LED drive board 203_1, the LED drive board 203_1 will be configured in a form in which an SCU card 205_1 that extracts and provides image data corresponding to an image of a specific area from the entire video frame image is combined. can Accordingly, one LED module 200_1, one LED drive board 203_1, and one SCU card 205_1 are configured in a 1:1:1 and integrated form.

For example, in the lower cover of the LED display panel 150 of FIG. 1, one LED module 200_1, one LED drive board 203_1 and one SCU card 205_1 are integrated to form a plurality of LEDs. Modules 200_1 to 200_N are configured. This is well shown in FIG. 2 . In an embodiment of the present invention, the LED module 200_1 in which the LED driver board 203_1 and the SCU card 205_1 are integrated may be named 'integrated LED module device' or 'integrated unit LED module'. Figure 3 shows an integrated LED module device according to an embodiment of the present invention. Each of the LED module 200_1, the LED driver board 203_1, and the SCU card 205_1 are formed to process the same resolution, such as a resolution of 256 × 256 pixels in horizontal and vertical resolution. Accordingly, when an abnormal operation occurs in one integrated LED module device, the normal operation of the LED display board 90 of FIG. 1 can be quickly implemented by replacing only the corresponding device. In addition, by manufacturing and configuring the LED driver board 203_1 or the SCU card 205_1 to match the resolution of the LED modules 200_1 to 200_N, the content processing speed can be rapidly increased, and the throughput of (data) packets is also constant. can keep it This is because all integrated unit LED modules are identically configured to process image data with a resolution of 256 × 256 pixels.

According to the above configuration, for example, when a video frame of 1024 × 1024 resolution is input from the outside, the first integrated LED module device of the LED display panel 150 of FIG. By extracting the image of the first region, the image is implemented in the LEDs constituting the first LED module 200_1. Since a typical LED implements one pixel in the form of integrating elements of red, green, and blue (this is referred to as a sub-pixel), an image can be implemented according to pixel values of 256 gray levels. In addition, the second integrated LED module device on the right side of the first integrated LED module device extracts images of the second area of the 257th to 513th in the horizontal direction and the 1st to 256th in the vertical direction to form the second LED module 200_2. Implements an image on the constituent LEDs. On the other hand, the third integrated LED module device located below the first integrated LED module device corresponds to the 1st to 256th horizontally and 257th to 513th vertically for the same input video frame of 1024 × 1024 resolution. By extracting the image data of the three regions, an image is implemented in the LED constituting the third LED module 200_3. Therefore, it can be seen that the fourth integrated LED module device extracts and processes the image data of the fourth area corresponding to the 257th to 513th horizontal and vertical positions, respectively.

In this way, the SCU 120 of FIG. 1 or the SCU card 205_1 of FIG. 3 according to an embodiment of the present invention receives image data of a unit video frame of the same size and extracts image data of an area under its jurisdiction. It is provided as a connected LED driver board. To this end, the SCU 120 or the SCU card 205_1 pre-stores pixel coordinate values or coordinate information about which area to be extracted from the input unit video frame, and uses this to specify a specific area whenever a series of unit video frames are input. Image data of the region can be extracted. Of course, in the embodiment of the present invention, an input unit video frame is divided into a size of 256 × 256 pixel resolution, and when the divided image data is received and processed, a separate divider is provided, and the SCU 120 or The SCU card 205_1 may not be configured. Therefore, in the embodiment of the present invention, it will not be particularly limited to any one of the above methods.

In addition, the LED module (200_1), LED drive board (203_1), and SCU card (205_1) of FIG. 3 constituting the integrated LED module device according to the embodiment of the present invention are formed in various forms on the board to be integrally configured. A coupling means may be included. For example, since the LED drive board 203_1 and the SCU card 205_1 are composed of a substrate such as a PCB, they may be spaced apart at regular intervals to prevent heat generation. Of course, the same applies to the LED module 200_1 and the LED drive board 203_1. The coupling means may be formed in the form of a pillar, that is, a pin or a protrusion, and coupling may be performed. Alternatively, various types of changes may be made, such as additionally configuring a separate heat dissipation plate (or a heat dissipation sheet, a heat dissipation member, etc.) so that heat is not transferred to other components to be coupled. In addition, in the case of the LED drive board 203_1, it may be configured in the form of an FPCB or integrally formed on the substrate of the LED modules 200_1 to 200_N. In this case, the LED modules 200_1 to 200_N )), since the SCU card 205_1 can be integrally configured, the embodiment of the present invention will not be particularly limited to the integrated form.

4 is a flowchart illustrating a driving process of the LED display board of FIG. 1 .

Referring to FIG. 4 together with FIGS. 1 and 2 for convenience of explanation, the LED display board 90 according to an embodiment of the present invention is composed of a plurality of LED modules 200_1 to 200_N, a plurality of drive board units, and a plurality of SCU units. However, one LED module (200_1), one drive board unit (203_1) and one SCU unit (205_1) are integrated as an LED signboard constituting one integrated LED module device, and a plurality of SCU units are : Extracts image data of different regions under its control from a (series) unit video frame provided by a set-top box, an interface unit or controller in FIG. 1, etc. (S400).

For example, when image data of a unit video frame having a resolution of 1024 × 1024 is input, the first SCU unit constituting the plurality of SCU units receives image data of the first region, and the second SCU unit receives image data of the second region. , And it can be seen that the third SCU unit and the fourth SCU extract image data of the third and fourth regions, respectively. To this end, each SCU unit may pre-store pixel coordinate values for extracting image data of each region from the input unit video frame and extract image data corresponding to the corresponding pixel coordinate values based on this. In the case of using pixel coordinate values, the area can be extracted using relative coordinates with the center of the unit video frame as (0, 0). An area can be extracted using absolute coordinates of 0, 0) or (1, 1).

In addition, a plurality of drive board units of the LED display board 90 receive (pre-)extracted image data of different regions and provide them to a plurality of pre-connected LED modules 200_1 to 200_N, respectively, to display unit video frames on the screen. It operates to implement an image of (S410). That is, as shown in FIG. 1 , the plurality of drive board units are controlled by the controller 110 or the SCU 120 to provide pixel data for implementing an image to the plurality of LED modules 200_1 to 200_N. As described above, an image may be realized by simultaneously driving a plurality of LED modules 200_1 to 200_N in a scan line manner. Here, the pixel data may be regarded as a voltage value for operating the LED light emitting element constituting the pixel. Of course, in the case of current driving, the corresponding voltage value may be a current value.

In addition to the above, the LED display board 90 of FIG. 1 can perform various operations, and since other details have been sufficiently described above, they will be replaced with those contents.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and is common in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications and implementations are possible by those with knowledge of, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

100: interface unit 110: controller
120: SCU (Switch Control Unit) 130: power voltage generator
141: scan driver 143: data driver
150: LED display panel 160: discharge performing unit
200_1: LED module 203_1: (LED) drive board (sub)
205_1: SCU card

Claims (7)

A plurality of SCU (Switch Control Unit) units each extracting image data of different areas under its jurisdiction from unit video frames provided from the outside; and
A plurality of driver board units that receive the extracted image data of different regions and provide them to a plurality of previously connected LED modules to realize images of the unit video frames on a screen;
Consisting of the plurality of LED modules, the plurality of drive board parts, and the plurality of SCU parts, one LED module, one drive board part, and one SCU part are integrated to form one integrated LED module device,
One side surface of each of the drive board parts is coupled to one side surface of each of the LED modules, and the other side surface of each drive board part is coupled to one side surface of each SCU part to form an integral body,
The LED module, the drive board part, and the SCU part are combined in a 1: 1: 1 ratio and composed of a plurality of equal numbers,
A first LED module of the plurality of LED modules is connected to a first data driver of the plurality of drive board units, and a first SCU of the plurality of SCU units is connected to the first data driver, and the first LED module extracted from the first SCU is connected to the first LED module of the plurality of LED modules. The image data of the area is implemented in the first LED module,
A second LED module of the plurality of LED modules is connected to a second data driver of the plurality of drive board units, and a second SCU of the plurality of SCU units is connected to the second data driver to obtain a second LED module extracted from the second SCU. An LED display board that implements image data of an area in the second LED module. delete delete According to claim 1,
The plurality of LED modules are manufactured to have horizontal and vertical resolutions of 256 × 256 pixels so that one character of Hangul can be expressed on 16 × 16 pixels, and operate in combination with each other. According to claim 4,
Each drive board unit and each SCU unit integrally coupled on each LED module process image data of 256 × 256 pixels in width and length corresponding to their area of jurisdiction in the input image data. According to claim 1,
When the LED module, the drive board part, and the SCU part are combined 1:1:1, respectively, the LED sign board is combined by securing a space for heat dissipation. It consists of a plurality of LED modules, a plurality of drive board parts, and a plurality of SCU parts, and one LED module, one drive board part, and one SCU part are integrated to form one integrated LED module device, and each drive board part One side surface is coupled to one side surface of each LED module, and the other side surface of each drive board unit is coupled to one side surface of each SCU unit to form an integral body, and the LED module, the drive board unit, and the SCU unit 1: As a driving method of an LED signboard composed of a plurality of equal numbers that are combined 1: 1,
extracting, by the plurality of SCU units, image data of different regions controlled by the plurality of SCU units from unit video frames provided from the outside; and
The plurality of drive board units receiving the extracted different image data and providing them to a plurality of pre-connected LED modules so that the image of the unit video frame is implemented on a screen; Including,
A first LED module of the plurality of LED modules is connected to a first data driver of the plurality of drive board units, and a first SCU of the plurality of SCU units is connected to the first data driver, and the first LED module extracted from the first SCU is connected to the first LED module of the plurality of LED modules. The image data of the area is implemented in the first LED module,
A second LED module of the plurality of LED modules is connected to a second data driver of the plurality of drive board units, and a second SCU of the plurality of SCU units is connected to the second data driver to obtain a second LED module extracted from the second SCU. A method of driving an LED display board that implements image data of an area in the second LED module.

Images