Back in CES 2010, Samsung has shown a transparent-laptop prototype, with a 14" display. Today they are revealing the structure of that display. The screen has a 960x540 resolution, and a brightness of 200cd/m2.
The top-emission OLED panel uses a LTPS TFT for its drive element. About 75% percent of each pixel is transparent, says Samsung, and this can be achieved by forming drive elements and organic EL elements (anode electrode, luminescent layer) on gate or source wiring. The OLED elements are made by using a metal stencil mask, and the cathode electrodes are made from a newly developed metal material.