An AD board (adapter board) is an electronic module responsible for converting and transmitting video signals between the image source (e.g. a computer or media player) and the display panel, typically an LCD-TFT. It enables connecting the display to popular interfaces like HDMI, DVI, VGA or Composite (CVBS), which may not be directly supported by the panel. The built-in controller analyzes the incoming signal and adapts it to the requirements of the specific panel in terms of resolution, refresh rate, control signals and voltage levels.
Depending on the model, an AD board may also offer LED backlight control, source selection, conversion to formats such as RGB, LVDS or eDP, and on-screen menus (OSD). Such modules are commonly used in industrial and medical devices, digital signage systems, prototypes and upgrades of older displays.
