[opendtv] Re: Spam Filter?
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 10 Jan 2005 11:25:10 -0600
cbenham@xxxxxxxxxxx wrote:
> The rise and fall time (persistance) for most TV CRT displays is slightly
> less than
> 5 milliseconds.
No. For TV set CRTS, the rise time is effectively instantaneous; it
is the time it takes the beam diameter to pass a single point. The
fall time for the fluoresece is not zero and varies with phosphor type,
but 5 milliseconds is very long for CRTs, becuase their fluorescence
decay is indeed pretty much exponential. The phosphorescence
decay is nonexponential.
Doug McDonald
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