Brian,
Without a data sheet, it would be pretty much impossible to figure this one out. Namely because it's probably a COG (chip on glass) type of display, where everything is integrated into one unit. I'm not familiar with that exact display, but given the fact that it has 40 pins, it won't be an easy task to figure out. Depending on the age of the technology, Sharp has been pretty helpful at giving datasheets. But, if it's something that's custom made or fairly new, I doubt you'll be able to find much info on it. Sorry