LED asynchronous control card (English name: led asynchronous control card) is an offline control component for LED displays. It consists of a CPU, power supply circuit, flash memory, FPGA data processing unit, and interfaces such as USB/serial port/network port. It is equipped with software such as LEDEditor and LEDsign to realize program editing and management [7-8] [10]. There are also designs based on 32-bit ARM processors or Nios II processors. Its data processing module consists of a corresponding CPU, SRAM/SDRAM and Flash memory.
It is divided into three categories: full-color, single and dual-color, and engineering asynchronous control card. It supports USB flash drive updates and LAN/Internet/3G/WIFI communication. The maximum controllable pixel is 307,200 points (640×480). It supports cascading expansion. The control card can run independently by pre-stored program content. It supports video hardware decoding, transparent text overlay, timed playback and automatic brightness adjustment. The onboard storage capacity can reach 32GB (eMMC chip), and the continuous video playback time is up to 30 hours. As a control component of LED displays, the performance of the LED control card directly impacts the display effect. Both full-color and single/dual-color series include various models, supporting 65,536 grayscale levels and multiple scanning methods. Some models feature remote management capabilities, enabling cross-regional cluster control via 3G network access to the internet, supporting remote program editing, status monitoring, and timed on/off switching.
The LED control card market has grown alongside industry development and increasing advertising demand. Asynchronous LED control technology is applied to some control cards, involved in the debugging of LED displays. These control cards possess display functions and various display effects, and provide management and operation settings.
1. The asynchronous technology used in the control card can be used for cluster management and remote control.
2. The control card supports internet access via wired broadband, wireless 3G, or GPRS.
3. Users with the control software installed can control the LED remotely from multiple locations via the internet, with each user operating independently.
4. The data service center is used for information exchange between the control card and user software.
5. Supports displaying multiple windows at any position on a single screen.
6. Supports multi-task scheduling, with the display and special effects calculations of each window handled by a single task.
