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Re: Kopin 320 on a Microcontroller?

Perhaps if there's a group effort put towards obtaining the timings for 320M
from Koping it would help? Afterall what are they going to lose by telling
us the timing for their
product, it should be in the specs anyways. Yet the gain I see is that we'd
put to use their old recycled displays and give them another life...

I dont think I'd like to drive it via parallel or USB port (besides as you
said not having enough bandwidth), I was thinking a VGA signal which should
give it a decent quality and edge over the composite that's currently being
in use with the Motorola driver chip.

With so many displays in the circulation today (heck I even got a pack of 42
myself) I feel it should be a viable solution/idea to try and connect them
with something else than Motorola driver because eventually Motorola will
say NO to sample requests once they figure out what we are doing here. I
mean there must be hundreds of these displays now in posession of various
individuals around the world, surely that number should warrant for some
collective effort :)

thanks,

-pedja

----- Original Message -----
From: "Nicolas Bingham" <>
To: <>
Sent: Tuesday, September 02, 2003 11:22 PM
Subject: Re: Kopin 320 on a Microcontroller?

> I believe the only actual hold up in this area is the availability of the
320M display timings. They are not described in the Kopin datasheet, and I
haven't had any success requesting them from Kopin.
>
> The Motorola driver IC datasheet describes some of the timings, but I
don't know if anyone would be prepared to start working on this until they
had a complete set available (no guesswork).
>
> One of the Motorola driver IC's also had provision for driving a colour
sequential LED backlight to provide a full colour display (as mentioned in
the previous message).
>
> If we work with 8bpp (for 256 colours) and the display resolution is 320 x
240 pixels = 230 kilobytes per colour frame. As far as micros are concerned,
the data rate should be achievable with some of the bigger PIC or Amtel
chips. This is too much for PC parallel ports though, even with rates up to
500kHz or so (dependant on hardware and OS).
>
> Maybe a USB based display driver would be possible but this increases the
cost. Other options include compression (preferably lossless until the data
rate limit is reached).
>
> In short there is more info required before anyone can begin, probably a
few months of development to get a prototype and although probably very
appreciative, a limited market to satisfy.
>
> I wouldn't see any sense in beginning design of a commercial display based
on the 320M now. To drive the small quantities that a lot of the list got
surplus (and I think more boxes of 42 are still available on eBay) the
TekGear RS170 boards / component kits / PCB's / Motorola chips are a good
bet. I agree its a shame it has to be reduced to a composite analog video
signal.
>
> Regards,
>
> Nick
>
> ----- Original Message -----
> From: 
> Date: Wednesday, September 3, 2003 12:09 pm
> Subject: Re: Kopin 320 on a Microcontroller?
>
> > Hi Brian
> >
> > I believe that it should not be that complicated and there wouldnt
> > be too much adc/dac conversion, plus with a microcontroller (I'm
> > thinking some Atmel perhaps) the Kopin 320 grey
> > can maybe become a colour display with a proper back light
> > (basically r/g/b LED controlled by the chip) in stage two (after
> > stage one actually gets the greyscale image displayed)
> >
> > Essentially it boils down to programming the proper timing for the
> > microcontroller to convert the signals properly, while the input
> > at the stage could possibly be RGB or Composite
> > depending on the supporting circuitry infront of the controller.
> >
> >
> > thanks
> >
> > -pedja
> >
> >
> >  ----- Original Message -----
> >  From: Brian Kuriyama
> >  To: 
> >  Sent: Tuesday, September 02, 2003 8:43 PM
> >  Subject: Re: Kopin 320 on a Microcontroller?
> >
> >
> >  uhhhh i think i remember someone did that or at least attempted.
> > but uhhhh i wouldn't dare try to attempt it (partly because i dont
> > know that much crap about adc and dac and don't wanna take the
> > time to learn). Anyways it depends on what you wanna do, and how
> > you wanna do it, but i think you gotta define "generic" in the
> > microcontroller biz lol
> >    ----- Original Message -----
> >    From: 
> >    To: 
> >    Sent: Tuesday, September 02, 2003 1:02 PM
> >    Subject: Kopin 320 on a Microcontroller?
> >
> >
> >    Is anyone working on connecting the Kopin 320 displays (that
> > everyone and their grandmother got by now)
> >    to a generic microcontroller rather than begging Motorola for
> > samples of their chip?
> >
>
>
>
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