After the EULA post, i started to browse treads in reddit and i found about this problem, i would like to know why it happens. It has to do with the AMOLED matrix? for example, the capacitor in the pixel circuit delaying the pixel due to charge time? or what is the reason of this problem.
Knowledge, the ever growing and most powerful tool known. Pick it up! the common fools are scared of it!
As far as I understand the people on reddit, it is a time-invariant issue, so no fading or something like that. Rather that "on" pixels are contaminating "off" pixels in the near neighborhood. Some people used the word "height", so it may be that only pixels in the same column are affected. Hence, it looks like on-pixels smear themselves vertically over nearby off-pixels. Like applying a vertical motion blur in Photoshop with 10-20 pixels kernel height and a low opacity of the filtered image, but only visible at off-pixels. But I may be wrong.
I'm wondering how bright pixels with RGB(1,1,1) are, which wouldn't show this smearing. If the display would be able to correctly apply the the standard 2.2-gamma, a black limited to 1 instead of 0 would still lead a contrast ratio of (1/255)^2.2 = 1:20000, which would be enough in my opinion.
Could it be caused by something much more simple? The low persistence mode flashes an image for 2 milliseconds and then goes to black. This only applies to non-black pixels. The true black pixels are not flashed, as they are black, so your brain sees them as fully persistent...
In a B/W example like below
Wwww Wbbw Wbbw Wwww
The white pixels around the edge are flashed as low persistence, but the black pixels in the middle are not... As there is nothing to flash. So, the black pixels are essentially persisting longer than the white pixels; causing your brain to see it as blur.
As i understand, its a display problem not a perception one, because you can't have a persistence illusion when you don't have any visual stimulus in that area, the problem keeps happening with low persistence turned off, even, it could be worse.
Knowledge, the ever growing and most powerful tool known. Pick it up! the common fools are scared of it!
"equusvenustas" wrote: As i understand, its a display problem not a perception one, because you can't have a persistence illusion when you don't have any visual stimulus in that area, the problem keeps happening with low persistence turned off, even, it could be worse.
A display problem would be easier to fix. Maybe not in DK2, but before CV1.
I wonder if a neutral density filter would hide it? It would darken the entire image but could also darken the near blacks to near near black. A little bit of diffusion action could also eliminate screen door.
But folks need to remember these are dev kits and not the final product. It's not a big deal if it isn't as immersive as some would like. Overall, it's still an improvement over DK1.
But... but... but... I just NEED to know about the Baba! The Baba has me hypmotized! :shock:
Of course we can't know for sure, but when top guys at oculus talk about how much better consumer will be, this might be the kind of thing they are talking about.
I was wondering about the smearing people are talking about (I don't have mine yet) and was wondering if it was phosphorescence of the OLED "phosphors" since that is kind of how they actually work. Phosphorescence is a an exponential decay in the light emission which is initiated by an electrical current but decays after the current is turned off. If light areas leave curly trails as people move the HMD in circles (kind of hard to describe) then it could be phosphorescence.
But if it is an overall glow that won't decay away after a few seconds, it could be the drivers are just never turning all the way off and the very slight current is enough to light up the display to where the human eye can see it.
But either way a neutral filter could possibly make it less noticeable.
But... but... but... I just NEED to know about the Baba! The Baba has me hypmotized! :shock:
