Blogs
on May 31, 2024
The led display control card is the key data conversion part of the control display. We also often say synchronous control card, asynchronous control card and so on. The following will introduce an LED control card from the control mode of the control card.
1. What is a led display controller
LED display controller, also known as LED asynchronous control system or LED display control card, is the core component of LED graphic display. It is responsible for receiving the screen display information from the computer serial port, putting it into the frame memory, and generating the serial display data and scanning control timing required by the LED display according to the partition drive mode.
2. How does the embedded real-time + offline two-in-one controller control the display
Embedded real-time + offline display, mainly composed of four parts: DVI sending controller or 1000M network card, CPU, memory (SD card), and display scanning driver. After power on, the system is initialized, and the CPU takes out the display content stored by the user from the memory (SD card), and sends it to the LED display to restore the content edited by the user. (The content edited by the user is sent to the controller through LAN communication). When the CPU detects that real-time information is sent, it will automatically switch the data channel to make the display screen turn into real-time display. Real-time display is the highest priority of the display.
3. Audio processing problem of embedded real-time + offline two-in-one controller
In the offline state, the controller has its own audio processor, which can play audio offline. But in the real-time state, the audio is passed through, and the DVI sends the real-time collection of audio by the controller (or 1000M network card), and sends it to the controller through the 1000M network cable, and then plays it see through led screen the audio playback chip. Therefore, the audio of the controller can be switched arbitrarily in real time and offline.
4. Which occasions are real-time + offline two-in-one controllers suitable for?
Real-time + offline two-in-one controller, suitable for many occasions. And the display screen can be used without turning on the computer. The LED display completely abandons the concept of asynchronous synchronization, which is a revolution in the application of display screens.
Unsuitable places: TV screens, super large display screens
5. Can the controller realize group screen control?
The control card has an Ethernet (local area network) interface for easy networking. Control the networked display screen through the computer in the local area network, which is suitable for group screen networking to release information.
6. Can the controller play animations and videos offline?
The controller can directly accept files in various video formats, and the software automatically processes them into the size suitable for the display screen, without cutting them into bitmaps, and sends them to the control card directly in the format of MPEG4, AVI, FLV, BMP, etc.
7. Does the LED display need to display pictures in gray scale?
The pictures on the computer are all in full color. If you want to truly restore the effect, only the full-color LED screen can do it. On a single-color LED screen, only patterns can be displayed, and pictures displayed on a two-color LED screen are more like black and white photos (they must also have grayscale). The so-called grayscale refers to the indicator of the ability of LED to display pictures. If there is no grayscale, it can only display text and patterns.