I'm an electronics newb. How would recommend connecting this to the Pi's composite or HDMI jacks? Is some intermediate board necessary? Is it necessary to connect via GPIO?
I found the datasheet (http://beyondinfinite.com/lcd/Library/S ... 7DH52.pdf/
) on it just now.
If you call yourself an electronics newb then this is not a good project. Making a connection with the display is a huge challenge for anyone that does not have the correct socket to plug it into. Its a shame since there are many mobile device displays like this one that are cheap.
If you could make he electrical connection then the data sheet has all the signal information, you would have to program the GPIO, HDMI could be used but would need a lot of interface circuitry (again not really suitable for a "newb") At first glance it looks like the display requires that you set up 6 bits of Red, Green and Blue data then pulse a clock signal. Also there is a sync signal to indicate start of frame and start of line. So, using GPIO, you would need extra GPIO pins or equivalent (like output and latch each of R,G,B)
As a rule, if there is any part of the data sheet that you dont understand then you are going to find it very difficult to design a circuit from scratch.
if you really want to try, then go on, give it a go, some people find it better to learn that way. You will almost certainly need a microscope to solder a connection to it.