Re: Plasma vs LCD Refresh Rates

On May 28, 12:01 am, Jan B <nos...@xxxxxxxxx> wrote:
On Tue, 27 May 2008 20:54:55 -0700 (PDT), "www.locoworks.com"

...

However, plasma displays "blink" and need a higher Refresh rate in the
panel to increase the frequency of the blinking. This is needed also
without any MCFI, but in principle, low frame rate judder of 24Hz film
material is visible also on a plasma display so it could benefit from
MCFI.
/Jan

Why do you say "plasma displays blink"? CRTs (good old fashioned
tubes) have a refresh effect because the phosphor coating the screen
is activated by a single electron beam that is swept across the screen
line by line. After activation, a clump of phosphor fades until the
beam has completed all the rest of the screen and returned to that
clump. My understanding is that while each cell of the plasma display
also relies on an activated phosphor coating to produce visible light,
the cells are independently addressable. That is, every cell is under
simultaneous control, so there is no fade interval as there is in a
CRT. Even if the cells cannot be held in a state of constant
activation and must indeed be refreshed periodically, that refresh can
be independent (and hence of a far higher rate) than the video frame
rate.

Dan (Woj...)

.

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