source: http://waclighting.com/sites/waclightin ... dwhite.pdfThe natural transparency of organic materials makes the OLED as sheer as standard glass or plastic when the power is turned off.
(I naively assume that it is possible to manufacture transparent versions of Samsung's high resolution AMOLEDs.)
Oculus already uses low-persistence, which means the display is turned off for the most of the time. It seems like the low-persistence would naturally make transparent OLED a perfect match - instead of wasting 80-90% of time for blackness it could just "disappear" to make other things possible.
Would it be possible to use transparency of the display for internal purposes instead of see-through/AR? For example: to let some sensors see what's behind the display? The opaque case of the headset (or some additional thin opaque layer, if needed) would make the screen perfectly black, so the user wouldn't even be aware, that the headset contains a transparent display.
I've seen a proposal to create cascaded displays, but even more exciting idea is eye-tracking with a possibility to use quite large and capable cameras:
There must be a catch somewhere
The most obvious potential issue I can think of is an unwanted optical distortion caused by optics or non-optimal focus resulting in blurriness. However, the cameras should be right behind the thin OLED, almost touching it, so it probably wouldn't be that bad and maybe it would be possible to counter it with cameras' lenses(?).