Newsgroups: comp.sys.amiga.graphics
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!batcomputer!cornell!johnhlee
From: johnhlee@CS.Cornell.EDU (John H. Lee)
Subject: Re:  Screen blankers
Message-ID: <1991Apr5.213251.14971@cs.cornell.edu>
Sender: news@cs.cornell.edu (USENET news user)
Nntp-Posting-Host: gefion.cs.cornell.edu
Reply-To: johnhlee@cs.cornell.edu (John H. Lee)
Organization: Cornell Univ. CS Dept, Ithaca NY 14853
References: <1991Apr4.143420.24871@milton.u.washington.edu> <yorkw.670779439@stable.ecn.purdue.edu> <frank.3738@morpheus.UUCP>
Date: Fri, 5 Apr 1991 21:32:51 GMT
Lines: 17

In article <frank.3738@morpheus.UUCP> frank@morpheus.UUCP (Frank McPherson) writes:
>It is not necessary for a screen blanker to make the screen entirely blank.
>The point of using a screen blanker is to make sure no one pixel on your
>screen stays active for hours.

Um, the purpose of a screen blanker is to reduce the amount of time pixels
are active.  Flashing a pixel on/off at a 50% duty cycle will burn a pixel
just as well as turning the pixel on constantly, just not as quickly.  A
screen blanker should *blank* the screen, not draw a pretty pattern that
does just as nice a job of burning as an image of a window.  It's worse if
the screen blanker doesn't turn on pixels evenly across the screen, making
one portion darker than the rest.

-------------------------------------------------------------------------------
The DiskDoctor threatens the crew!  Next time on AmigaDos: The Next Generation.
	John Lee		Internet: johnhlee@cs.cornell.edu
The above opinions of those of the user, and not of this machine.
