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Re: re HMDs

Just take the cones off the speakers

Atoms has finally been released!
www.doldev.freeserve.co.uk

----- Original Message -----
From: Johannes Spielmann <>
To: Samuel J. Brockington <>
Cc: <>; D. Joshua Marker <>
Sent: 08 August 1999 12:10
Subject: Re: re HMDs

> "Samuel J. Brockington" schrieb:
>
> > why are we mucking with motors,
> > I saw a set up, where two mirrors were glued onto speakers, so that the
> > mirror tilted when the speaker bounced, two speakers one for horizontal,
> > and one for verticle. by controling the wave form through the speakers
you
> > draw with the beam, all you have to do is run scanning waveforms into
the
> > speaker, (which is built for high frequency signals) and then synchrosie
> > the blinking of the light.
> > the had part would be syncronising the left right and the up down to
each
> > other and to the blinking of the light, but if one controller was
> > outputing all the waveforms?
> >
> > right now Were learning the 68hc11, but its only a 2mhtz chip? so that
> > just barly takes care of 80x25 char 5x7 dots, I ordered a mouser catalog
> > to look for faster parts because the only way i say  to do it with
> > HC11'sthrough a serial interface, was to have one chip accept all the
> > incomeing charectors off the serial line and draw the 5x7 font into a
> > video memory, and to have another chip shovel the control singnal out
the
> > back as fast as it could, but that saves mucking with gears and spining
> > things, once you align the optics so the laser hits both mirrors, its
all
> > electrical engineering?
> >
> > thoughts?
> > thanks
> >
> > sam
> >
> > --
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>
> Nice idea.
>
> But then again we have vibration problems.
> As far as I guess you would need a rather high amplitude and high
frequencies.
> So I guess power consumption would be a problem.
> How about sound? Wouldn't this thing produce sonic waves? Taking usual
refresh
> rates, you'd have about, hmm, 60 kHz horizontal and up to 100 Hz vertical,
and
> one of them is *hearable*!
>
> Why not put that into one thing without a mirror? Using the same principle
as
> the Braunsche tube does, you'd only have to have a signal, a light, which
> you'd have to translate to a screen. Why not do this with magnets? I think
I
> heard about some sort of laser display with exactly that some time ago,
but I
> don't know how it developed.
>
> Anybody watched the pilot movie to "Viper"?
> They used a display there that looked quite interesting.
> It looked like a simple white pad, on which the picture was projected from
a
> small sort of tube, connected to cables going somewhere away from the
body. I
> guess they produced the picture somewhere and sent it to the display via
glass
> fiber.
> Any ideas what it was?
>
> Johannes!
>
>
>
> --
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>
>

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