Originally Posted by DoomDash
QD, kinda pointless considering I don't think the human eye can tell the difference.
The human eye can resolve more than you think. An HD TV doesn't come close to filling up your rods and cones right now...I can tell because I've got a 55" in my living room that I work on now and then from a distance of around 4ft and I see the pixels clear as day.
A perfect human eye has a resolution of around 50 CPD (cycles per degree) which translates to 1.2 arc minutes per line pair. If you were looking at a black and white pair of bars smaller than that, they would simply appear gray. That means against a black background, a 0.6 arc minute width line of pink would be slightly visible to you.
If a screen occupies 60 degrees of your field of vision, and assuming you're 20/20, it would need a resolution of around 4,000 - 6,000 pixels across...depending on what you're watching.
I doubt anything higher than 5,000 would really be noticeable to anyone though. This assumes a 60 degree field of view on the screen however.
If you go bigger (and we will over time, remember when people said 17" monitors were as big as you could comfortably view...now people have 30" on their desks) and the screen fills 90 degrees of your vision, it would need to be around 6,000 - 9,000 pixels across.
To give you an idea of a 90 degree screen field of view, look at a 55" (diag, 16:9) screen from a distance of roughly 2 feet.Edited by kweechy - 10/4/11 at 9:42am