Introduction An LED display control system, also known as an LED asynchronous controller, is the core component of an LED graphic display screen. The LED display controller receives screen display information from the computer's serial port, stores it in the frame memory, and generates the serial display data and scanning control timing required by the LED display screen according to the partitioned driving method. It is the core component of an LED graphic display screen.
Classification Simply put, it is divided into: single/dual-color control cards, multi-color control cards, and full-color control cards. LED displays have gradually entered the civilian market, such as storefront screens, various indoor and outdoor square screens, and other strip-shaped screens. The USB flash drive LED control card solves this problem. Using the most common and inexpensive information transmission medium, the USB flash drive, even if the user does not have a computer, can use a computer in an internet cafe, at home, or with a friend to edit content and update the display screen. The USB flash drive does not need to be constantly plugged into the display screen or its extension cable; after plugging it in, the information is stored in the screen within seconds, and then the USB flash drive can be removed. The USB flash drive LED control card has common serial communication functions, and users who want to communicate directly with a computer can connect and use it directly. Using USB flash drives to transmit LED display screen content has been gradually applied to LED displays throughout the country.
LED displays primarily display various texts, symbols, and graphics. The displayed information is edited by a computer, pre-loaded into the LED display's frame memory via an RS232/485 serial port, and then displayed screen by screen in a loop. It offers a rich variety of display modes and can operate offline. Due to its flexible control, ease of operation, and low cost, LED displays are widely used in various industries.
Synchronous LED control cards are mainly used for real-time display of video, text, and notifications. They are primarily used for indoor or outdoor full-color large-screen displays. The operation of a synchronous LED control card system is essentially equivalent to that of a computer monitor; it maps the image on the computer monitor point-to-point in real-time at a refresh rate of at least 60 frames per second. It typically has multi-grayscale color display capabilities, achieving multimedia advertising effects. Its main characteristics are: real-time performance, rich expressiveness, relatively complex operation, and high price. A typical synchronous LED display control card system consists of a sending card, a receiving card, and a DVI graphics card.
Asynchronous LED display control cards, also known as offline LED control cards or offline cards, are mainly used to display various texts, symbols, graphics, or animations. The displayed information is edited by a computer and pre-loaded into the LED display's frame memory via an RS232/485 serial port. It is then displayed and played back screen by screen in a loop, offering a rich and varied display experience. Its main features are: simple operation, low price, and wide applicability. Simple asynchronous LED control cards can only display digital clocks, text, and special characters. Graphic asynchronous LED control cards, in addition to having the functions of a simple control system, are characterized by their ability to control the display screen content in designated areas.
