LCD display with ILI9341 driver on Arduino

Hi guys.

I've bought one of these and am struggling to get the examples from this source to work: GitHub - gmtii/ili9341-arduino: ILI9341 2.2 LCD library. My device is identical to the one in matchy's photo in post #24.

Forgive my complete ineptitude; Do the inputs of the screen sink or source current? I am using a non-inverting 4050B and notice that TheCoolest's post #7 illustration seems to suggest he's using an inverting 4050. If this is correct, am I likely to have blown it up?