Controlling back lights directly?
I've been trying to find solutions for controlling lcd backlighting directly. I see there is some software solutions but if it doesn't set the LED brighness directly then it's not really what I want - even a 'black' LCD display dives off a lot of light in the dark. Everything I've found so far consists arduino's or fusion brains to custom pic circuits. It's gotta be easier than this. AFAICT all of the touch screens I'm considering using are LED back lit. Couldn't I just power the LED's directly using a simple circuit that varies the duty cycle based on either the instrument cluster lighting or a pot as an input?
Which brings me to another question. I need a display that I can get at the LED wiring. One of the displays I'm considering is the Lilliput 669GL-70NP/C/T-HB-RV. I've been able to find from pictures that there is a 4 and a 2x30 conductor ribbon cable connecting the display to the controller board, but there is also a two wire connection as well. I've been told that this display powers the LEDs through a single jack - is this it? I can't find any technical docs to figure this out for myself so can anyone confirm this?