Synchronous control led display are widely used to display the animation, video and TV programs. It is often composed with the red, green and blue colors, each color has 256 gray grade, so the total gray grade of the screen is 16.7 million. Because of this, the display can have vivid and clearly images.
The control of this display is synchronous control systems, and requires a computer to support it. When the led display works, the control computer should work together. The led display shows the information on the computer in real time. If the control computer or the monitor was turn-off, the led display will not work.
Synchronous control systems include:
①Sending card: which is installed at the control computer, and send the information to the receiving card. One led display needs one sending card. And if the displays is not far away from each other, we can use one sending card to control several displays
②Receiving card: which is installed at the led display cabinet, and receive the information from the sending card, and transfer it to the led modules. One led display cabinet needs one receiving card.
③Video card: which is installed at the computer, and realized the video displaying function.