I'm using one to drive a printer here at work, and from what I see - the answer is that it won't work.
USB LPT adapters don't emulate a hardware printer port - they add their own software LPT port. LCD's require hardware level access to the printer port in order to send control codes.
I know it's not the concrete "failed attempt" that you're looking for, but that's pretty much what we figured out a year ago.
If somebody begs to differ, I'd like to see it.