This is an adaptor board for the T420s and T430s Thinkpads to allow for a 1080p screen.
The board works by converting the LVDS signal from the motherboard into an EDP signal which is used in the 1080p screens. 
The recommended screens are:
  • B140HAN01.1
  • B140HAN01.2
  • B140HAN01.3
  • LP141WF1-SPB1
  • LP140WF1-SPV1
  • LP140WF1-SPK1
  • LTNN140HL02-B01
The first three are matte panels.

It is up to the buyer to buy the correct screen. 

I am an Australian seller.

Please contact me for further details.