LED advertising screen how to use notebook control
Generally, senior technicians of LED display screen know that LED advertising screen needs to have high display performance and effect, but for the convenience of control, the LED advertising screen control system should have sufficient input and output interfaces and remote communication functions. The system structure of our LED advertising screen controller based on HDMI1.3 technology. The system can be divided into: 6 analog inputs, 1 VGA input, 2 DVI inputs, status indication, real-time clock and optical fiber data transmission models according to functions.
At present, LED advertising screens mainly include synchronous display and offline display according to the data transmission method. The LED advertising screen control introduced in this paper is a synchronous display system, that is, a set of embedded systems are used to provide video sources for the LED advertising screen, which can not only reduce costs, but also has high feasibility and flexibility, and is easy to construct. . The independent video LED advertising screen system is completely out of the control of the computer, and it can realize functions such as communication, video playback, data distribution, and scanning control. Since the controller controls the large frame data, it is necessary to distribute the data provided by the video source, and correctly send the data of different rows and columns to different controllers.
The data correction sub-module receives the data input from the front end, and stores the data in the SDRAM after performing point-by-point correction. Then the field data is divided into 8 groups and sent to the LED advertising screen distributor at the same time.
The FPGA reads in the input data according to the timing relationship and performs the next processing. Since the parameters of the LED advertising screen cannot be completely consistent during the production process, in order to obtain a good image display effect, the LED tubes must be screened.
When the data is distributed and sent, the signals are all transmitted in the form of LVDS. Because this system adopts MCU+FPGA structure, it can realize real network remote operation. It can not only be used as a general LED advertising screen controller, but also can form a large outdoor advertising media network with each display node. According to HDMI technology to control the LED advertising screen, the brightness is suitable, the resolution is fine, the field scanning frequency is high, and the pixels are high, which can be used for outdoor broadcast applications. The design is calibrated at a single point, so that purchasers can relax the requirements of LEDs in terms of brightness and color, and the cost of related purchases is also reduced.
