dudewheresmycode wrote:My main issue is that I can't figure out how to get the metal casing off without destroying everything inside and cracking the LCD panel. If I can find an intact bare LCD glass panel (transparent LCD with no backlight & no casing) I could be in business with the controller/boards I have that should still work.
Nice idea! But I'm sorry to say: no way for you to do this!: You will not get access to a bare LCD glass panel nor to an open cell (unless you're interested in buying a huge quantity of them).
By the way: a bare LCD glass would be of no use for you since you need to attach the control circuitry (control PCB) to it (FYI: the C-PCB is part of the module; the PCB on the back of you RPi display simply converts MIPI (DSI interface) to DPI (the display has a 24-bit RGB interface)).
That's why an open cell would be what you need to look for (FYI: open cell is a LCD+C-PCB but without backlight, light guides, optical sheets, chassis etc).
Inside the module might be some kind of double sided adhesive to keep everything in place --> use gentle force (if any) during disassembly.
This is some guessing now since I don't own an 'official RPi Touch display', but: The touch is bonded (=fixed with double sided adhesive) to the LCD module --> you would have to remove it as well for use with your projector.
I also like the idea of using DSI for attaching other displays, but there's no way for doing this atm.
So, you might be better if you start looking for dirt cheap LCD modules with DPI interface (18-bit pr 24-bit color), rip them apart and use them instead. Driving them from the GPIO directly is a piece of cake (i.e. my latest build viewtopic.php?p=1010869#p1010869