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From: dth@cs.brown.edu (Dzung T. Hoang)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Loop Omnisync non-interlaced monitors (anyone have one?)
Message-ID: <72906@brunix.UUCP>
Date: 20 Apr 91 17:48:51 GMT
References: <1991Apr17.164509.19165@d.cs.okstate.edu> <1991Apr19.185311.6972@leland.Stanford.EDU> <28109@uflorida.cis.ufl.EDU> <1991Apr20.013922.2643@leland.Stanford.EDU>
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Reply-To: dth@cs.brown.edu (Dzung T. Hoang)
Organization: Brown University Department of Computer Science
Lines: 16


In all the calculations of refresh rate and how 60Hz or less implies
flickering, one important factor has been left out--the phosphor.  The
phosphor on the monitor screen lights up for some time after an electron
hits it.  This length of time is variable and is determined by the
"persistence" of the phosphor.  A monitor with a higher persistence
phosphor will be less likely to show flicker even at 60Hz.  But then
the high persistence can pose other problems, such as trails when doing
animation.

Television is interlaced and each pixel is effectively refreshed at a
rate of 30Hz.  How many of you notice flicker on the tv screen?
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Dzung T. Hoang
dth@cs.brown.edu
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