How Do I Determine The Screen Manufacturer For My MacBook Pro Retina Display?
Go to your Applications folder and launch Terminal. Paste in the following and hit return:
ioreg -lw0 | grep "EDID" | sed "/[^<]*</s///" | xxd -p -r | strings -6
Look at the beginning of the second line to see which manufacturer made your display. If it starts with LP then you have an LG display. Samsung displays start with LSN