Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site bbnccv.UUCP
Path: utzoo!linus!philabs!cmcl2!harvard!bbnccv!rupprech
From: rupprech@bbnccv.UUCP (Wolfgang Rupprecht)
Newsgroups: net.micro.pc,net.micro
Subject: Re: IBM Graphics improvement
Message-ID: <85@bbnccv.UUCP>
Date: Mon, 30-Sep-85 22:13:21 EDT
Article-I.D.: bbnccv.85
Posted: Mon Sep 30 22:13:21 1985
Date-Received: Wed, 2-Oct-85 11:08:31 EDT
References: <579@tekigm.UUCP>
Reply-To: rupprech@bbnccv.UUCP (Wolfgang Rupprecht)
Distribution: net
Organization: Bolt Beranek and Newman, Cambridge, MA
Lines: 21
Xref: linus net.micro.pc:5179 net.micro:10926
Summary: 

In article <579@tekigm.UUCP> timothym@tekigm.UUCP (Timothy D Margeson) writes:
>For this enhanced method, say we want to have a color somewhere between
>the violet above and red. In this case we turn on the red gun for one
>pixel time as above, BUT, we only turn the blue gun on for 1/2 a pixel
>time.

Initially, this is what I thought too. Unfortunately, this would
require them to effectively run the monitor at TWICE its normal
bandwidth. It could also cause bizarre shadow effects on higher res
(.21 mm triad spacing) monitors. The red-violet of your example would
most likely look like a small violet pixel with a faint red shadow to
the left and right.

I suggest that they are really modulating the colors by 'interlacing'.
The red-violet in the above example would be created by having the
pixel be red-and-blue (ie. violet) for one frame and only red for the
next frame. This has the advantage of not raising the bandwidth
requirements of the monitor. I wonder if that form of 30 hz color
flicker is visible. Anybody know?

				-wr


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