The indoor display control card, also known as the LED controller card, is a key component that connects the host system and the LED display panel, responsible for receiving display data from the host, converting it into driving signals that the LED panel can recognize, and controlling the on-off state of each LED pixel. As the "bridge" between the control system and the display terminal, the performance of the control card directly affects the display effect, response speed, and stability of the indoor LED display. Indoor display control cards are usually classified according to the number of controlled pixels, signal interface types, and functional characteristics to adapt to different specifications of indoor LED panels.

The core functions of indoor display control cards include data buffering, grayscale control, and scanning drive. The data buffering module can temporarily store the display data transmitted by the host, ensuring continuous and stable data supply to avoid display interruptions caused by data transmission delays. Grayscale control is crucial for improving the color richness and image layering of indoor LED displays; advanced control cards support high grayscale levels (such as 16-bit or higher), enabling the display to present subtle color changes and smooth gradient effects. The scanning drive module converts the digital data into analog drive signals, controlling the scanning sequence of the LED panel to realize the full-screen display of images or videos.

With the development of intelligent display technology, modern indoor display control cards are increasingly integrated with intelligent features. Many control cards support remote monitoring and management, allowing users to check the working status of the control card and the display panel through a network and perform fault diagnosis and parameter adjustment. Some high-end control cards also have multi-card synchronization capabilities, which can realize seamless splicing and synchronous display of multiple LED panels, meeting the needs of large-size indoor display scenarios such as stage backgrounds and large conference halls. In addition, the miniaturization and low-power design of control cards make them more suitable for installation in limited indoor spaces, while reducing the overall energy consumption of the display system. The compatibility with various operating systems and control software also enhances the usability and versatility of indoor display control cards.