I have been trying to make a discrete led display blacker.
At first it seemed like a easy solved problem, but it led me through an interesting path.
In order to solve it you need to look at other technologies and how they solved it in the first place. Have you ever wondered how CRTs and LCDs accomplish black?
CRTs do it with tints and eye tricks (perceived contrast). LCDs with polarization (or at least this is what I think, because you can't see the white diffusers behind)
