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From: kevinc@cs.athabascau.ca (Kevin Crocker)
Newsgroups: comp.windows.ms
Subject: Re: Interlaced monitors
Message-ID: <1540@aupair.cs.athabascau.ca>
Date: 15 Mar 91 20:09:08 GMT
References: <6919@mace.cc.purdue.edu> <1991Mar6.174932.14469@cbnews.att.com> <70457004@bfmny0.BFM.COM> <1991Mar15.023840.28733@rti.rti.org>
Organization: Athabasca University
Lines: 35

bcw@rti.rti.org (Bruce Wright) writes:

>A number of years ago when I worked with some medical imaging
>hardware, I made the comment that some manufacturer's hardware
>had more of a visible flicker problem than others, and that I
>could see the flicker with a couple of the monitors even when
>I looked directly at the screen (the cones in the center of the

>Turned out I was about the only one in the lab who could see the 
>flicker on those monitors unless the others looked at the monitors
>"out of the corners of their eyes" when they could see it too.

Just out of information, I did do a controlled study of several
monitors and video cardw -- BUT, I did it for personal reasons and only
had a few other people involved.  I suffer from a reasonably rare eye
disease that creates problems with my perception of both horizontal and
vertical edges.  This includes typefaces and especially grpahics that
have edges in hte vertical and horizontal range.

Almost all monitors have flicker to me because of my sensitivity to the
edges of all the various video tests.  

Right now I'm running a 21" Taxan with a scan rate up around 78kHz (I
hope I remembered that right) and a video card that can put out a
signal for non-interlaced 1280x1024 by 256.  I can still see flicker
and refresh.  What I can't see is the edges of all these wonderful
windows on my screen so I end up clicking on the wrong thing all the
time.  I doubt if there are many netters that can still see flicker on
something equivalent to what I'm using.

Kevin
-- 
Kevin "auric" Crocker Athabasca University 
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