To get the LCD part number type in or copy and paste the following string in to the terminal:
ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6
After executing the command you should receive a set of digits and numbers. If you want to determine the manufacturer of your display, simply take the model number generated in Terminal and type it into Google. Usually various OEM part listings will show the name of the brand for your particular LCD screen.
Macbook Air
Cinema Display