> >I know this has been discussed before (what were some of the message > >subjects? I'd like to look them up in the archive...), but what would > >it > >take to build your own display? Even it was only mono. I'm sure there > > It depends on the resolution. Take a look at the "moving sign" > schematics > on the internet for a few ideas -- those are bitmapped displays that can > be mechanically scanned. In fact, there are several schematics for > scanned > variants too! Very low resolution, but made with off-the-shelf LED > arrays, > though. > > (virtual clock is a name sticking in my mind) > > Of course, a full resolution mono display would just be a bigger version > of one of these displays -- harder to build with more connections (unless > > multiplexed) but otherwise, very similar. A little creative engineering, > and > multiple shades of "gray" could be reasonable too. I see. I'm guessing shades of gray would be accomplished by strobing the LEDs at a particular speed? I wonder how expensive it would be to use fiber optics to route the light from the LEDs to the eye-piece, so the bulk of the LEDs can be stored in a better location... > A Hercules compliant HMD might have its uses! Yes, that would be good. Would you happen to know where I can find specs on the Hercules standards? > >designs such as this one. Also, as far as experimental wearables are > >concerned, how far would we be able to stray from the standard > >VGA/NTSC > >hardware and protocols? Eliminating that and using a much cleaner > > Why VGA specifically? Make it with one of the other "standards," i.e. > MDA, Herc, CGA, EGA, VGA, QVGA, SVGA, XGA, PGA, or > one of the numerous others I'm leaving out. Well, I was thinking of VGA only because I've seen some people complaining of it's complexity or power consumption in the circuitry. But I suppose sticking to a mono standard such as Hercules would be best in the end. > I'd be willing to bet that there is a single (or maybe double) chip set > that would do one of these standards, and that's pretty cheap. > > It's only a guess, but I would say Hercules, being the best > monochrome graphics standard, and the standard of choice for DTP > and CAD stations (until SVGA got good and cheap), had a lot of > single chip options available. Hmm, I should look around for some specs on some of these. That would certainly save a lot of effort. I was thinking I'd have to get into FPGA programming for it, but maybe not with one of these... :-) Rudy -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org
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