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From: maj@hpfinote.HP.COM (Mike Jassowski)
Newsgroups: sci.electronics
Subject: Re: HeadsUp Display ( WAS Re: Big Screen Projector from tiny LCD TV ? )
Message-ID: <15880016@hpfinote.HP.COM>
Date: 24 Aug 90 18:52:17 GMT
References: <2916@anasaz.UUCP>
Organization: Hewlett Packard CICD
Lines: 12

speaking of removing the backing on LCDs and projecting light through
them. Has anybody tried to make a heads up display that way? Something
that could be fitted to a helmet or added to glasses. 
----------

 Heads up displays are useful because they are virtual images focused
at infinity.  You don't have to refocus your eyes when you look from a
distant object to the display, and can therefore read the information
faster.  Having a LCD a few inches from your face will be difficult to
even focus on, much less focus quickly.

--Mike