look at a LCD controller datasheet (I gave you the link for a b/w 320*240 Pixel controller). There is also described how the interfacing to the LCD is made.
How do you want to drive the LCD? Directly by a micro? This is possible but will take a lot of power. If you need grayscale you have to implement a frame-rate modulation. This is complicated to do it right (or you will get a lot of moiree on the screen).
Here the link: **broken link removed**
They differ also in pixel RAM (internal or external) and in the uP interface. I have already used a S1D13705 (the datasheet I gave you). This one has an internal pixel-RAM and can be connected to nearly every uP. You can use it with 1/4 VGA sized displays (320*240 Pixels) b/w or color.