KR100545921B1 - Control device of LED display board using TV output signal - Google Patents

Abstract

The present invention stores a signal of 256 colors or more and controls RAM A 104 and RAM B 105 controlled by Ping Pong Type, PC 101 generating a TFT LCD output signal, and TFT provided from the PC 101 Image data from V_Sync, DE, DCLK of the LCD output signal is extracted from the PC 101 while generating Coloum Address and Line Address signals used to store them in the RAM A 104 and RAM B (B) respectively. Stable LED by generating the double reference clock based on the frequency of the LED clock signal and the image acquisition control device 102 that converts the RGB data signal of the TFT LCD output signal to the data signal format of the LED module through a look up table Oscillator 107 to generate clock signal and control signal, and LED control signal generator for generating control signal address, chip selector, out enable, and latch of the dynamic type LED module from the signal of the oscillator 107, respectively Using the 108 and the V_Sync signal of the TFT LCD output signal provided from the PC 101, the image data in the RAM B 105 while storing the image data in the RAM A 104 in an odd frame. RAM control device 103 that controls to output a signal and controls to output image data signals stored in RAM A 104 while storing image data in RAM B 105 in even frames ), LED data signal conversion device (106) to adjust the data value of the LED module to match the control signal input from the LED control signal generator 108 in time to indicate more than 60 frames per second and 256 colors or more ) Are made as basic features of the technical configuration.

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Description

CONTROL APPARATUS OF LED ELECTRIC SIGN USING THE TFT LCD OUTPUT SIGNAL using LED output signal

1 is a block diagram showing a control device for an LED display using a TFT LCD output signal according to the present invention.

Figure 2 is a control signal waveform diagram of a dynamic type LED module applied to the control device of the LED display board using a TFT LCD output signal according to the present invention.

Figure 3 is a connection block diagram showing a Dynamic Type applied to the control device of the LED display board using a TFT LCD output signal according to the present invention.

4 is a waveform diagram showing a TFT LCD control signal applied to the control device of the LED display board using the TFT LCD output signal according to the present invention.

* Explanation of reference numerals for main parts of drawings *

101: PC

102: image acquisition control device

103: RAM control device

104: RAM A

105: RAM B

106: LED data signal converter

107: Oscillator

108: LED control signal generator

The present invention relates to a control device for an LED display board using a TV output signal, and more specifically, a dynamic type LED module display device can be used to display a video displayed on a computer screen very inexpensively and easily. It relates to a control device for an LED display board using a TV output signal that can provide more clear and no noise during display by controlling the Ping Pong Type to store signals of 256 colors or more in RAM B.

In general, the use of LED billboards is used for advertising purposes because of its excellent visual effect as opposed to a written or general simple signal (still screen), and such LED billboard signs are widely used in various places such as hospitals, railways, airports, and highways It is utilized and provides various information such as various information and guidance through the electronic board very effectively.

However, such a display device can be expected to have an excellent publicity effect, but has a disadvantage in that it is difficult to utilize because it is too expensive to install and manage compared to an advertisement device providing a general signboard or still image.

In particular, when the content to be provided through the electronic display board is intended to represent a video that is not a combination of simple characters or a light or a light, there is a problem in that a very expensive module must be used, and the content displayed on the computer screen is displayed on the LED display board. In order to display on the device, a signal conversion device is required. In the related art, the driving circuit is very complicated due to A/D conversion of RGB image data from the feature connector of the graphic card. .

In addition, in the related art, it is not only possible to display a color of 256 colors or more by connecting to the LED display device of the existing Dynamic Type, and there is also a problem in that a very expensive LED module must be used by connecting to the LED module device of the Static Type.

The present invention has been devised in view of the above problems, and its purpose is to perform A/D conversion using a graphic card feature connector to display a video of 60 frames or more per second on a conventional LED display device. Using a dynamic type LED module display that is very inexpensive compared to the static method without using a complicated driving device, it is possible to display the video displayed on the computer screen more cheaply and easily, and displays more than 256 colors of signals in RAM A and RAM B It is in the development of a control device for an LED display board that uses a TV output signal that can provide clear and no noise when displaying a video by controlling it with a Ping Pong Type.

To achieve the above object, the control device of the LED display board using the RF output signal according to the present invention,
RAM A and RAM B, which are controlled by the Ping Pong Type and store signals of 256 colors or more,
PC that generates TFT LCD output signal,
While generating video data from V_Sync, DE, DCLK of the TFT LCD output signal provided from the PC 101 and storing them in the RAM A 104 and RAM B, respectively, generating the Coloum Address, Line Address signal and the PC An image acquisition control device for converting the RGB data signal of the TFT LCD output signal provided from the data module format of the LED module through a look up table;
Oscillator to generate a stable LED clock signal and control signal by generating twice the reference clock based on the frequency of the LED clock signal,
LED control signal generator for generating the control signal address, chip selector, out enable, latch of the dynamic type LED module from the signal of the oscillator (107), respectively
By using the V_Sync signal of the TFT LCD output signal provided from the PC, the odd frame controls to output the image data signal in the RAM B while storing the image data in the RAM A, and in the even frame A RAM control device for controlling to output image data signals stored in the RAM A while storing the image data in the RAM B;
Technical configuration that includes an LED data signal converter that adjusts the data value of the LED module to match the control signal input from the LED control signal generator in time so that it can display more than 60 frames and 256 colors per second. The basic features of the top.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings, and through these embodiments, objects, features, and advantages of the present invention may be more easily understood.
1 is a block diagram showing a control device for an LED display board using a TFT LCD output signal according to the present invention, and FIG. 2 is a dynamic type LCD module applied to a control device for an LED display board using a TFT LCD output signal according to the present invention Control signal waveform diagram, Figure 3 is a connection block diagram showing the Dynamic Type applied to the control device of the LED display board using the TFT LCD output signal according to the present invention, Figure 4 is a LED display board using a TFT LCD output signal according to the present invention It is a waveform diagram showing the TFT LCD control signal applied to the control device.
In the present invention, the dynamic type LED display board is a method that drives the LED display module of the display board system, and is a concept that is contrasted with the static method.

As illustrated in FIG. 1, the control device of the LED display board using the TV LCD output signal according to the present invention stores signals of 256 colors or more and controls RAM A 104 and RAM B 105 controlled by a Ping Pong Type, Image data is extracted from the PC 101 generating the TFT LCD output signal and V_Sync, DE, DCLK of the TFT LCD output signal provided from the PC 101 and stored in RAM A 104 and RAM B (B), respectively. The image acquisition control device 102 converts the RGB data signal of the TFT LCD output signal provided from the PC 101 into a data signal format of the LED module through a look up table while generating a coloum address and line address signal used to make , Oscillator 107 to generate a stable LED clock signal and control signal by generating twice the reference clock based on the frequency of the LED clock signal, and control of the dynamic type LED module from the signal of the oscillator 107 RAM A (104) in odd frames using the V_Sync signal of the TFT LCD output signal provided from the LED control signal generator (108) and the PC (101) that generate signals Address, Chip Selector, Out enable, and latch, respectively. ) While controlling to output the image data signal in RAM B (105) while storing image data, and in even frame, the image data is stored in RAM B (105) while storing image data in RAM B (105). A RAM control device 103 that controls to output an image data signal, and a control signal input from the LED control signal generator 108 to input the data value of the LED module to indicate more than 60 frames and 256 colors per second. It consists of a configuration including a LED data signal converter 106 for adjusting to match with time.

More specifically, in the present invention, the PC 101 is an industrial computer, and is designed to generate a TFT LCD output signal and output image data appearing on the screen to a TFT LCD connector (not shown).

In the present invention, the image acquisition control device 102 is used to extract image data from V_Sync, DE, DCLK of TFT LCD output signals provided from the PC 101 and store them in RAM A 104 and RAM B (B), respectively. While generating the Coloum Address and Line Address signals, the RGB data signal of the TFT LCD output signal provided from the PC 101 is converted into the data signal format of the LED module through a look up table.

In the present invention, the Oscillator 107 generates a double reference clock based on the frequency of the LED clock signal so that a stable LED clock signal and a control signal can be generated.

In the present invention, the LED control signal generator 108 generates a control signal address, chip selector, out enable, and latch of the dynamic type LED module from the signal of the oscillator 107, respectively.

In the present invention, the RAM control device 103 uses the V_Sync signal of the TFT LCD output signal provided from the PC 101 to store the image data in the RAM A 104 in the odd frame while in the RAM B 105. It controls to output the image data signal, and controls to output the image data signal stored in RAM A 104 while storing the image data in RAM B 105 in the even frame.

In the present invention, RAM A (104) and RAM B (105) are preferably composed of SRAM type to store signals of 256 colors or more and controlled by Ping Pong Type.

In the present invention, the LED data signal converter 106 adjusts the data value of the LED module to match the control signal input from the LED control signal generator 108 in time so that it can display more than 60 frames and 256 colors per second. do.

As described above, the control device of the LED display board using the TV LCD output signal according to the present invention uses a graphic card feature connector to display a video of 60 frames per second or more on a conventional LED display panel display device. Instead of using a complicated driving device to convert to /D, the dynamic type LED module display, which is very inexpensive compared to the static method, can be used to display the video displayed on the computer screen very cheaply and easily, and 256 in RAM A and RAM B. It has an excellent effect to store a signal over color and control it with a ping pong type at the same time to provide a clear and clear noise when displaying a video.

Claims (1)

RAM A (104) and RAM B (105), which are controlled by the Ping Pong Type and store signals of 256 colors or more, PC 101 that generates a TFT LCD output signal, Generates Coloum Address, Line Address signals used to extract image data from V_Sync, DE, DCLK of TFT LCD output signals provided from the PC 101 and store them in the RAM A 104 and RAM B (B) respectively. And an image acquisition control device 102 for converting the RGB data signal of the TFT LCD output signal provided from the PC 101 into a data signal format of the LED module through a look up table. Oscillator (107) for generating a stable LED clock signal and control signal by generating a double reference clock based on the frequency of the LED clock signal, LED control signal generator 108 for generating a control signal address, chip selector, out enable, latch of the dynamic type LED module from the signal of the oscillator 107, respectively, By using the V_Sync signal of the TFT LCD output signal provided from the PC 101, in the odd frame, the image data is stored in the RAM A 104 and the image data signal in the RAM B 105 is output. A RAM control device 103 that controls and outputs image data signals stored in the RAM A 104 while storing image data in the RAM B 105 in even frames; Includes an LED data signal conversion device (106) that adjusts the data value of the LED module to match the control signal input from the LED control signal generator (108) in time to display more than 60 frames and 256 colors per second. The control device of the LED display board using the TV LCD output signal, characterized in that made by.

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