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Posted by Gene E. Bloch on 10/06/87 11:45
On 4/17/2006, ~P~ posted this:
> Jeff...
>
> Pixel response time has nothing to do with what this - you do get that don't
> you? Flicker is not possible with LCD - period. You don't have to believe
> it, but you shouldn't say it because it isn't accurate.
>
> Judder is possible - and is more an element of 24fps material that is shown
> on 60fps displays.
>
> Stairstepping is possible - and is an element of interlaced material being
> shown on progressive scan displays.
>
> But, while LCD flat panels have poor pixel response time, they will NOT
> flicker. They never go 'off' unless told to - so no flicker is possible.
>
> Most of all: What about LCD projection? DLP projection? LCoS? None of
> those are nearly as slow as LCD flat panels in terms of response time, and
> none of them suffer from this issue either. Of those, only plasma is
> phosphor based.
>
> But please - keep explaining it as magazines being inaccurate, manufacturers
> fudging specs, and LCDs refreshing to the same state they are already in.
> That'll eventually convince me that you are right - I'm sure. ;o) Really -
> lighten up.
>
>
> "Jeff Rife" <wevsr@nabs.net> wrote in message
> news:MPG.1eae0b4411a9593b98a483@news.nabs.net...
> Gene E. Bloch (spamfree@nobody.invalid) wrote in alt.tv.tech.hdtv:
>> Two complete progressive scans, at 1/60 second each, equals 33 msec by
>> *my* math. Please show me how a 15 ms response time equates to two
>> complete progressive scans by *your* math.
>
> Who cares about two complete scans? By the time the second scan is
> starting, *none** of the pixels have finished changing from the first scan.
> Thus, *every* pixel gets changed again before it finishes changing for
> the first time.
>
> In addition, some manufacturers fudge their specs (say it isn't so!) so
> that an LCD rated at 15ms can only achieve that in very specific
> circumstances (usually white to black or black to white). Other changes
> can require more time...sometimes as much as twice as long. If that's
> the case, then some pixels will get *two* new change requests before it
> finishes changing for the first time.
Tell me, ~P~, do you think Jeff Rife will ever get it? I think it's
time to go our separate ways...
What a picture - Jeff Rife in the foreground, back toward the viewer,
watching you and me silhouetted against the sundown as we ride off into
the West ... Flicker-free.
Gino
--
Gene E. Bloch (Gino)
letters617blochg3251
(replace the numbers by "at" and "dotcom")
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