I have been looking for
so long, seven years, indeed, for a monitor and stand which can fit in a carry on, is full HD and no smaller than 19". I have settled on the LL-S201A but gosh, how can I recommend that when it's so expensive? And the stand is still a problem.
Look at the
http://www.sceptre.com/overview-496.html it's a 21.5" diagonal with the whole shebang being 19.56” x 11.49” x 1.22”. This is, indeed, carry on sized, the second dimension is the biggest problem usually but below 12" is probably not a problem, the AOC e2351f was 21.7"x13.5" for example and that doesn't fit anywhere. And look, VESA mount! And only 12V @ 2A which can be done with a very very small and cheap
adapter if the shipped one is too big. And has digital input. Ticks all the boxes and only costs 100 bucks on
Amazon.
The stand is still not solved.
As for stand, it'd be incredible if we could find this stand from Yiynova
https://images-na.ssl-images-amazon.com/images/I/41U+f7mu8fL.jpg the newer version which I have is
https://www.ebay.com/itm/New-VESA-stand-for-YiyNova-15-19-22-Tablet-/122213620734 available but not cheap. However, I found
https://www.amazon.com/dp/B01N0VNIA9/?tag=theminutiae-20 which will probably double the weight of the monitor
and require some additional purchases from eBay to replace all the screws with thumbscrews but it'd be definitely one of the more stable stands one could buy and even the longest piece is only 14", compare the sizing
https://images-na.ssl-images-amazon.com/images/I/71lwNisL5TL._SL1500_.jpg image to
https://m.media-amazon.com/images/S.../fSvCQsRHCB._CR0,77,3311,1883_UX300_TTW__.jpg this show of parts -- and it would lift the monitor off the table which is rare for a portable stand. Finally the Ergomart Limbo might be an option but I do not how easy it is to make it completely flat for travel
https://www.ebay.com/itm/292515453398 . It is possible this
https://www.aliexpress.com/item/x/32814637118.html would fit -- the center line is claimed to be 6.7" so the 12" high monitor would fit. I have no idea how stable it would be when it's only 6.3" wide, however.
I tried a mic tripod and the results were not satisfactory. It would need to be much wider however the K&M 19685 is a good start if anyone wants to experiment with this. There's also
https://www.thomann.de/gb/millenium_vesa_stand_mount.htm but I do not know where to get it in North America, the K&M is relatively widely available.