The screen controller transmits the information to be displayed to the video processing and control unit for video processing. The gray level control system can control the display screen to display bit data of 8 bits for each primary color, that is, gray levels for each primary color. In the system, the brightness of each primary color of a single module can be adjusted separately, the color balance can be adjusted, and the mosaic phenomenon can be basically eliminated. The brightness consistency of all modules and display modules is good, and the monochrome display has no visual difference.
The video processing and control unit transmits the processed display information to the communication module for long-distance transmission to the display screen. The communication module ensures that the display content of the screen controller is transmitted to the display screen accurately and over a long distance.
The communication module encodes and decodes the transmitted information, performs long-distance transmission and receives data processing. The communication module transmits the display information to the data distribution and scanning unit. The LED display is usually composed of a main controller, a scanning board, a display control unit and an LED display body. The main controller obtains the brightness data of each pixel of a screen from the computer display card, and then assigns it to several scanning boards.
The board is responsible for controlling several rows columns on the LED display screen, and the LED display signals on each row column are cascaded and transmitted through each display control unit in the row in a serial manner, and each display control unit directly faces the LED.
The work of the main controller is to convert the signal of the computer display card into the data and control signal format required by the LED display screen. The function of the display control unit is similar to that of the image display screen, which is generally composed of a shift register latch with a grayscale control function.
The function of the scanning switch is the so-called link between the previous and the next. On the one hand, it accepts the video signal of the main controller, on the other hand, it transmits the data belonging to this level to its own display control units, and at the same time, it also sends the data that does not belong to this level downward.
A cascaded scan pull transmission. The differences in space, time, sequence and other aspects of video signal and LED display data need to be coordinated by a scanning board.
Structure and working principle of LED display screen. The main composition of the LED display taking a more complex synchronous full-color screen as an example 1.
Metal structure frame, its function is to form the inner frame, carry various circuit boards such as display unit boards or modules, and switching power supplies 2. Computer and its peripherals Second, the main function module analysis 1. Video broadcast Through multimedia video control technology and VGA synchronization technology, various forms of video information sources can be easily introduced into the computer network system, such as broadcast TV and satellite TV signals, camera video signals, VCD video signals, computer animation information, etc.
Implement the following functions: Support VGA display, display various computer information, graphics and images. Real-time display of color video images to achieve live broadcast. Rebroadcasting of radio, satellite and cable television signals. Computer broadcast Graphic effects display function: It has the functions of editing, zooming, flowing and animation for graphics and text. Network function Equipped with a standard network interface, it can be connected to other standard networks information inquiry system, municipal publicity network system, etc.
Collect and broadcast real-time data of each database to realize remote network control. Access to the Internet through the network system With a sound interface, it can be connected to audio equipment to achieve sound and image synchronization. Screen controller The screen controller controls the display effect of its corresponding display screen. Video processing and control unit The video processing and control unit performs image processing of the display data, including: The second-level grayscale nonlinear correction can be adjusted automatically or manually.
Automatic or manual stepless brightness adjustment. Image noise reduction processing to ensure a cleaner and smoother image. Image enhancement technology, image edge enhancement technology. Motion compensation technology, chromaticity adjustment function. Visual processing In the system, the brightness of each primary color of a single module can be adjusted separately, the color balance can be adjusted, and the mosaic phenomenon can be basically eliminated.
The emitting light from a diode depends on the energy needed by the bandgap of semiconductor material. For emitting of white color light,more than one layer of semiconductor material is used and phosphor can be used.
It was the time used for common purposes in but their intensity of light was less and emit infrared light. Currently used LED emit light of ultraviolet, visible and infrared wavelength. Older types of LEDs were used in different small size incandescent bulbs, indicator lamps, and 7 segments displays.
Nowadays LEDs producing high-intensity lights are used in buildings and rooms for illumination. There are numerous benefits of LEDs over incandescent lights such as less power usage, longer operating life, less dimensions, etc. The diodes are used traffic signals, cameras, different medical instruments. See you in next post have a good day. I am a professional engineer and graduate from a reputed engineering university also have experience of working as an engineer in different famous industries.
I am also a technical content writer my hobby is to explore new things and share with the world.
0コメント