Simply speaking, the LED display is composed of a number of display units (unit display panels or unit display cabinets) that can be combined and spliced, together with a suitable controller (main control board or control system). Therefore, a variety of display panels (or unit cabinets) with different control technology controllers can form a variety of LED display screens to meet the needs of different environments and different display requirements.
First, the main components of the LED display (take the more complex synchronous full color screen as an example)
1. Metal structure frame, which functions to form an inner frame, and is equipped with various circuit boards such as display unit boards or modules, and a switching power supply.
2. Display unit: It is the main part of the LED display, which is composed of LED lights and drive circuits. The indoor screen is a unit display panel of various specifications, and the outdoor screen is a module cabinet.
3. Scanning control board: The function of the circuit board is data buffering, which generates various scanning signals and duty cycle gray level control signals.
4. Switching power supply: Turn 220V AC into various DC power and supply it to various circuits.
5. Transmission cable: The display data generated by the main controller and various control signals are transmitted to the screen by the twisted pair cable.
6. Main controller: buffers the input RGB digital video signal, converts the gray scale, reorganizes, and generates various control signals.
7. Dedicated display card and multimedia card: In addition to the basic functions of the computer display card, it also outputs digital RGB signals and lines, fields, blanking and other signals to the main controller. In addition to the above functions, multimedia can also convert the input analog Video signal into a digital RGB signal (ie, video capture).
8, the computer and its peripherals
Figure 1 LED display system composition
OBD Connector Section.
OBD:On Board Diagnostics.
One is to connect to the OBD interface of the vehicle through a special data line. Reading out the data and displaying it on the matching display screen is basically equivalent to adding a driving computer display screen. At ordinary times, the connecting cable can be plugged into the OBD interface all the time without removing it, and only the fixed display screen is needed. The owner can choose the data to be displayed by himself
OBD Connector Section
ShenZhen Antenk Electronics Co,Ltd , https://www.antenkcon.com