Almost all. I can't really help with that -- there should be some sort of controller or interface chip/circuit there, but that's all I know. I've not learned much of that sort of stuff yet.
I will say that I once had a TTL LCD panel, 9in diagonal IIRC -- but it was very strange in a number of other respects in addition to protocol. I'd gotten it from eBay, and it arrived a bare LCD -- by which I mean that it was *just* the panel and control circuitry. You could see right through it -- I was to provide my own backing for it, and backlight as well! Plus the connector was an odd number of pins -- no key pin, longer on one side than the other. Weird, weird surface mount thing. Not having any use for it, I recycled the panel and wrote off the (fortunately fairly minimal) expense.
'Twas a Sharp panel, as I recall. I may still have the datasheet -- I'm making some adjustments after installing Linux Mint right now on the machine that would have that document. I'll look when it's done... should be a half hour or so. Who knows? Maybe it comes with backing and backlight now... if not, it's still possibly useful if you throw it on an overhead projector (remember those? :D ) -- I've seen that exact use case in school, years ago... it's doable. I don't know if it screws with the panel, though...