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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!gatech!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!pacbell.com!well!louis
- From: louis@well.sf.ca.us (Louis Jaffe)
- Subject: Re: What causes monitor flicker?
- Message-ID: <BtJww5.8rs@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- References: <1992Aug25.133857.22266@news.columbia.edu>
- Date: Tue, 25 Aug 1992 18:04:53 GMT
- Lines: 16
-
- It's a known characteristic of human vision that flicker is more
- perceptible with a bright field. Hence your observation of it in
- the desktop display. Flicker is also more perceptible in peripheral
- vision than looking straight on. Stand a few feet away and look to
- the side of your CRT-- it'll probably appear to flicker much more.
-
- Persistence of the phosphor is one factor in hiding or revealing flicker.
- A high-persistence phosphor glows longer after the electron beam has
- scanned past. But if the persistence is too high you get ghosting on
- moving cursors, scrolling, etc.
-
- Still another factor is scan line interlacing. I'll leave it to
- a more articulate and technically qualified person to explain that.
-
- LJ
-
-