How does the LED screen control card control the LED screen?
Tags: led, screen, control
Published: 2024-05-28 02:56:53


The LED screen control card is one of the key components of the [LED display screen](https://www.sostron.com/product?category=2). It is responsible for converting the input screen information into data and control signals that the LED screen can display. The following is a detailed introduction to the working principle and functions of the LED screen control card: 

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/9uw8igj6uy5iw2ok463h.jpeg)

1. Overview of LED display controller:

The LED display controller is one of the core components of the LED display, also known as the LED asynchronous control system or LED display control card. Its main function is to receive screen display information from the computer serial port and store it in the frame memory. Then, the LED display controller generates the serial display data and scan control timing required for the LED display according to the set partition driving method. [Here is the knowledge about synchronous control and asynchronous control of LED display. ](https://www.sostron.com/service/faq/3618)

2. Working principle of embedded real-time + offline two-in-one controller:

The embedded real-time + offline two-in-one controller usually consists of four parts: DVI transmission controller or 1000M network card, CPU, memory (SD card), and display scan driver. After booting, the system initializes, and the CPU reads the display content stored by the user from the memory (SD card) and sends it to the LED display to restore the user-edited content. When the CPU detects that real-time information is being sent, it will automatically switch the data channel and update the content on the LED screen in real-time display.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ojrpq3wzd2ngicsojk94.png)

3. Audio processing of embedded real-time + offline two-in-one controller:

In the offline state, the controller has a built-in audio processor that can be used to play audio offline. In the real-time state, the audio is collected in real time through the DVI sending controller or 1000M network card, and then played through the audio playback chip. Therefore, the audio function of the controller can be switched between real-time and offline. [Provide you with the working principle of LED lamp beads. ](https://www.sostron.com/service/faq/7842)

4. Applicable scenarios of real-time + offline two-in-one controller:

The real-time + offline two-in-one controller is suitable for many scenarios, and the LED display can be used without connecting to a computer. This kind of controller is suitable for various information release occasions, but it is not suitable for television screens and ultra-large display screens. [Provide you with the characteristics, application scenarios and prospects of LED flexible screens. ](https://www.sostron.com/news/2348)

5. Controller’s group screen control and offline playback functions:

The control card usually has an Ethernet (LAN) interface, which can be easily networked. Through the computer in the LAN, the networked LED display can be controlled to realize group screen networking to publish information. In addition, the controller can play various animation and video files offline without connecting to a computer.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/xghp178e729xvq3tm7lz.png)
6. Gray scale requirements of LED display:

LED displays usually need to have certain grayscale capabilities when displaying images to restore the true effect of the image. On a monochrome LED screen, although patterns can be displayed, the image is more like a black and white photo, so a certain gray level is required. LED full-color screens can better restore the effect of color pictures because they have higher grayscale capabilities. [LED displays are divided into single-color, dual-color and full-color types. ](https://www.sostron.com/service/faq/3651)

To sum up, the LED screen control card realizes the display function of the LED display screen by controlling data conversion and signal transmission, and has a variety of applications and flexibility in different scenarios.

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/x23lx4f5y32texyzq89i.png)
Thank you for watching. I hope we can solve your problems. Sostron is a professional [LED display manufacturer](https://sostron.com/about). We provide all kinds of displays, display leasing and display solutions around the world. If you want to know: [How do LED display companies respond to the AR/VR market?](https://dev.to/sostrondylan/how-do-led-display-companies-respond-to-the-arvr-market-43k5) Please click read.

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