LED display sending card is an electronic device used to control and drive LED display, which plays a vital role in LED display system.
The following is a detailed introduction to LED display sending card:
Basic definition and function
Definition: LED display sending card is an independent control board connected to a computer or other control device, used to receive image or video signals and convert them into signals suitable for driving LED display.
Main functions:
1. Signal reception and conversion: Receive image or video signals from a computer or other signal source, and convert them into a signal format that can be recognized and displayed by the LED display.
2. Data processing: Process the received signal, including color correction, brightness adjustment, grayscale control, etc., to ensure the accuracy and stability of the display effect.
3. Signal transmission: Send the processed signal to the LED display receiving card (LED receiving card) through a specific interface (such as a gigabit network port) to achieve control of the entire LED display.
Composition and working principle
Composition: LED display sending card is usually composed of key components such as DVI module, FPGA controller, gigabit network output module, etc.
Among them, the DVI module is responsible for receiving the video signal, the FPGA controller performs data processing and caching, and the Gigabit Ethernet output module sends the processed data to the receiving card.
Working principle:
1. Signal reception: The DVI decoding chip decodes the received video signal and passes the data and control signal to the FPGA controller.
2. Data processing: The FPGA controller caches in the internal RAM and performs operations such as replacing the clock domain and bit width conversion to process the video signal.
3. Signal transmission: The processed data is sent to the receiving card through the Gigabit Ethernet output module, and the receiving card then distributes the signal to each pixel of the LED display for display.
Features and advantages
Supports multiple input signal interfaces: such as DVI, HDMI, VGA, etc., to adapt to different types of input devices.
Multi-output port design: The sending card usually has multiple output ports, each of which can be connected to one or more LED display modules to achieve control of the entire LED display.
High resolution and high refresh rate: Support high-resolution video input and high-rate refresh rate to ensure the clarity and smoothness of the display effect.
Flexibility and scalability: The scale and layout of LED display screens can be flexibly expanded through cascading and splicing.
Application scenarios
LED display sending cards are widely used in various occasions that require high-definition and large-size displays, such as outdoor billboards, indoor stage backgrounds, stadium displays, commercial exhibition displays, etc.
Precautions
* When using the LED display sending card, it is necessary to ensure its compatibility and stability with the receiving card.
* Regularly maintain and inspect the sending card to ensure its normal operation and extend its service life.
* Select the appropriate sending card model and configuration according to actual needs to meet the display needs of different occasions.
In summary, the LED display sending card is an important part of the LED display system.
It is responsible for converting the video signal into a signal format that the LED display can recognize and display, and sending it to the receiving card through a specific interface for display.
Its high performance, flexibility and scalability make LED display screens widely used in various fields.