LED display screen is an emerging information dissemination medium, which is widely used in indoor and outdoor advertising exhibitions, sports venues and other occasions.
It has the advantages of high brightness, bright colors, good clarity and high reliability.
Follow this article and let us learn more about how the receiving card works.
If you have any questions, please feel free to contact us.
What is a receiving card?
In electronic equipment, a receiving card refers to a device that receives external signals and decodes them.
Receiving cards are usually used in LED displays, digital radio and television systems, electronic signboards.
To receive external signals and convert them into the format required by the display or device.
Working principle of receiving card
The working principle of the receiving card can be summarized into two steps: decoding and driving display.
Decoding is to convert external signals into a format that can be recognized by the computer, and driving display is to convert the signals output by the computer into the signals required by the LED display.
Specifically, the receiving card converts the signal into a format suitable for the television or display screen by receiving serial data or parallel data.
During the decoding process, the receiving card will process contrast, brightness, chroma and other aspects to convert the original signal into an image that is more in line with human vision.
Another key function of the receiving card is to drive the display.
By converting the digital signal output by the computer into an analog signal that matches the display screen, the receiving card can convert the digital signal into the electrical signal required by the display screen, thereby realizing the normal operation of the display screen.
Application of receiving card on LED display
Receiving cards are widely used in LED displays. Generally speaking, LED displays are divided into many modules, and each module requires a receiving card to receive, decode signals and control the display.
These receiving cards need to be connected to the control card of the LED display through data lines.
In the application of LED display screens, the performance of the receiving card has an important impact on the display effect.
High-performance receiving cards can achieve faster signal conversion and more precise drive control, thereby achieving higher-quality image display effects.
Application of receiving cards in radio and television systems
Similar to LED displays, equipment in broadcast and television systems also need to receive input signals and decode them.
The application of receiving cards in radio and television systems is to convert input signals into identifiable digital signals, then encode and encrypt the digital signals, and finally convert the digital signals into analog signals for playback.
How to choose a good receiving card?
The resolution of the receiving card
The resolution of the receiving card refers to the maximum number of display pixels it can support, usually expressed in terms of the number of horizontal pixels and the number of vertical pixels.
The resolution determines the display effect of the LED display. A higher resolution can present clearer and more delicate images.
Brightness adjustment range of the receiving card
The brightness adjustment range of the LED receiving card determines the height adjustment ability of the LED display screen in different environments.
The larger height adjustment range allows the LED display to display a clear and bright picture in a sunny outdoor environment, while in a dark environment it can be adjusted to a lower brightness to avoid dazzling light.
Color processing capabilities of the receiving card
Color processing capability refers to the expressiveness and restoration of color by the LED receiving card.
Better color processing capabilities allow the display to present more realistic and vivid colors, making images more realistic.
Refresh frequency of receiving card
The refresh frequency refers to the number of times the LED display screen is refreshed per second, expressed in Hertz (HZ).
A higher refresh frequency can make the image smoother, reduce flickering and smearing, and improve the display effect.
iSEMC's LED video wall has receiving cards suitable for each different model type, which can better display images and maintain stability.
Grayscale of receiving card
The gray level refers to the gray level that the LED receiving card can display.
The higher the gray level, the richer the color levels of the displayed image and the smoother the color transition.
Common grayscale levels include 8-bit, 12-bit, 14-bit, etc. Among them, the 12-bit grayscale can display 4096 levels of grayscale, and the color transition is more delicate.
Final thought
LED sending cards and receiving cards play a vital role in LED display systems.
Through the LED sending card, we can convert display content such as images and text into signals that the display screen can understand;
While the LED receiving card is responsible for receiving data signals and controlling the brightness and color of the LED lamp beads.
The collaborative work of these two components allows the LED display to present high-quality, uniform images and animation effects.
LED sending card and receiving card are essential and important parts to master the working principle of LED display.
In practical applications, it is necessary to select the appropriate sending card and receiving card according to specific needs to ensure the normal operation of the LED display.
