How to drive 1080p with only 540 pins?
A LED/LCD display is constructed of multiple panels: 16x16, 64x64, etc depends on the supplier.



These panels are mounted such to produce the 1920 x 1080 pixels

Each panel will have its own interface IC and LED/LCD driver chipset like the tlc59283

How is each panel/module controlled? via a serial interface.

If you look at a 320x240 panel such as this one you will see its interface is only 40pins wide &amp; it clocks through D1:DH1 --> D320:DH240 as it reads in the RED, GREEN, BLUE data line to determine the hue saturation and brightness to be applied to the cell to be illuminated.

Larger displays use more panels and with vertical scan rates of say... 100Hz but with a fixed serial bandwidth per panel... a larger number of data lines are required to address each panel in a parallel fashion. 

http://www.edn.com/design/led/4432914/How-to-design-LED-signage-and-LED-matrix-displays--Part-1

http://www.fujitsu.com/downloads/MICRO/fma/pdf/LCD_Backgrounder.pdf