Phosphor glows - the image decays away and is overwhelmed by the next
frame/sweep.
LCD's extinguish the frame before the next image.
But the persistence of the human eye should be around 14fps, give or
take.
After that, the illusion of movement kicks in.
How the hell are you guys coping in a non-didge cinema with a 24fps
rate?
There, half the time you're looking at a dark screen.
That's a hellofalot slower than an LCD and has the same total
extinguishment for longer periods.
It would have to be impossible.
So if cinema is acceptable, we must be looking at a different effect
than simple 'persistence of vision'.
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 28/09/2007, at 4:21 AM, Chuck Norcutt wrote:
> Hmmm. I find your answer unsatisfying. Although a CRT lights each
> pixel with an electron beam sweeping across the phosphors the beam is
> moving at an extremely fast rate. So fast that it hits every single
> pixel once every 16.7 ms if the refresh rate is 60 Hz and faster than
> that if the refresh rate is higher. Obviously, the phosphors have to
> have a persistence at least as long as 16.7 ms else they'd go dark
> before the beam came around again... that awful flicker.
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