The LED display receiving card is an important part of the LED display control system.
It is responsible for receiving image data from the sending card (or main controller) and converting this data into signals suitable for LED screen display.
The following is a detailed introduction to the LED display receiving card:
Definition and function
Definition: The LED display receiving card, also known as the LED receiving card or receiving board, is a key component in the LED display control system.
Function:
1. Receive data: Receive multimedia data such as images, videos, and text from the sending card or main controller.
2. Data conversion: Convert the received data into signals that can be recognized by the LED screen according to a specific protocol and format.
3. Drive display: Drive the pixels on the LED display through the converted signal to display according to the predetermined content.
Structure and composition
The LED display receiving card is usually composed of multiple key components, including:
Main control chip: The core part of the receiving card, responsible for receiving instructions, data processing and signal transmission.
Memory chip: Used to store information on various display contents so that it can be called at any time when needed.
Decoding chip: Interpret the information in the storage chip and convert it into corresponding electrical signals.
Clock chip: Provides accurate clock signal to ensure the accuracy and stability of signal transmission.
Driver: Converts the electrical signal sent by the decoding chip into the current and voltage signal required to drive the LED light-emitting diode.
Working principle
The working principle of the LED display receiving card can be simply summarized as the following steps:
1. Data reception: The main controller transmits the display content data to the main control chip of the receiving card through the sending card.
2. Data storage: The main control chip stores the received data in the storage chip for subsequent processing and calling.
3. Data processing: The main control chip processes the data in the storage chip according to a predetermined sequence and issues corresponding instructions.
4. Signal conversion: The decoding chip obtains instructions from the storage chip and decodes them, converting them into electrical signals suitable for LED screen display.
5. Drive display: The driver converts the electrical signal sent by the decoding chip into the current and voltage signals required to drive the LED light-emitting diode, thereby realizing the control and display of various positions of the display.
Selection and calculation
Selecting a suitable LED display receiving card is essential to ensure the normal operation and performance of the LED display. When selecting and calculating the receiving card, the following factors need to be considered:
Screen size: Determine the length, width and height of the LED screen to understand the required number of pixels.
Resolution: Determine the required resolution based on the size of the screen and the viewing distance.
Data transmission rate: The data transmission rate determines the refresh rate of the screen. A high refresh rate can bring better dynamic effects but also increase costs.
Receiving card load capacity: Different receiving cards have different load capacities, that is, the number of pixels of the LED screen that each receiving card can control. When calculating the number of receiving cards, it is necessary to ensure that the total load capacity of the receiving card is greater than or equal to the total number of pixels of the LED screen.
Application scenarios
LED display receiving cards are widely used in various occasions, including billboards, large propaganda slogans, floor advertisements, LED stages, etc. It enables LED screens to display various images, videos and text content in real time and accurately, becoming an indispensable part of modern urban landscapes and commercial propaganda.
In summary, the LED display receiving card is one of the key components in the LED display control system. It controls and displays the LED screen by receiving, converting and driving signals.
When selecting and using a receiving card, you need to fully consider its performance parameters and application scenarios to ensure the normal operation and optimal effect of the LED display.