These cards distribute the image and video information they receive and send it correctly to each of the LEDs and pixels that make up the screen, to create and form a complete image or video. All this process is done in real time, so it is a process that requires speed and complete coordination between all the components of the screen and the Sending Card.
These cards are directly connected to the modules or LED boards, so they have to be located inside the LED screen. The receiving card has several data outputs that, according to their processing capacity, send control information to a certain number of modules or led boards.
Receiving Cards have a limited capacity to process information. According to this capacity, the price of a Receiving Card will vary. In addition, it is possible to integrate auxiliary elements into these cards, such as:
– Interior temperature sensor
A temperature sensor is integrated in the card itself, which informs us about the temperature inside the screen.
–What is the use of knowing the screen’s interior temperature?
With this data, we can program associated functions that can be activated, for example, internal cooling systems to reduce the working temperature.
– Turning fans on and off:
These outputs provide the power to switch LED screen indoor fans on or off. If this function is associated with the temperature of the sensors, we can program them to turn on or off.
– On and off power supplies
In most cases, the content player’s “turn off” feature is used. This way you can visually “turn off” the contents of the screen. However, the screen is still on, but with a much lower consumption. For this reason, it is sometimes interesting to have a physical shutdown control of the power system.
– Colour calibration on LED screens
With use and depending on the quality of the screen, all panels and LED modules may have to be recalibrated. By doing this, we allow the screen to have colour uniformity and complete contrast once again.
This task requires the use of auxiliary tools (calibration video cameras, special software, etc.).
– Smoke detection
Detects smoke levels inside the screen through an ionic sensor. When smoke is detected, it triggers an alarm in the control software and sends the user an alert message. If we use advanced control systems on LED screens, we can synchronize and establish protocols and action orders. For example, we can assign a programming routine so that, in case of detecting smoke, the power system will automatically stop.
– Warning unauthorized access to the LED screen
The cabinets / frames have rear doors to access the internal electronic components. This door sensor triggers an acoustic alarm when it detects an unauthorized opening of the door. This, in turn, sends the user a warning.