The two boards are called the power board and the driver board.
Power supply board with power supply interface.
The driver board, the one attached to the LCD.
The LCD driver board is often called A\/D (analog\/digital 1 board), which in a sense reflects the main function of the driver board. LCD screen to display images, the need for digital video signal, LCD screen driver is to complete the conversion from analog signal to digital signal (or from a digital signal to another digital signal conversion), and under the control of the image control unit to drive the LCD screen display image function module. The LCD driver board usually contains the main control chip, MCU microcontroller, ROM memory, power module, power interface, VGA video signal input interface, OSD key board interface, high pressure board interface, LVDS\/TTL drive screen signal interface and so on.