[Wear-Hard] Heavy MyVu Crystal Modifications

[Brian Kuriyama]

Crap, Accidentally hit the send button, my last email wasn't finished,
here's the complete one:
-------------------------------------------
So, I was wondering how ballzy people here are. If they rip apart several
hundred (if not potentially thousands) of dollars worth of displays to build
their equipment, whats another $300 right?

So, my UX's retarded Intel GMA950 chipset will not output to "TV out" and
VGA output at the same time, if I wanted to add my HMD as a 4th screen to
the setup without disabling my 22inch, I would need to use a USB to VGA
adapter of sorts. Problem is, my display controller only takes composite
video *natively*! And that's where a little digging began. I remember
working with Kopin's display drivers before and I know they don't skimp on
functionality. Especially for a display as useful as a full color VGA one!

While looking up the driver chip found in my MyVy Crystal headset, I came
across the datasheet for it!!!
http://www.kopin.com/data/SSD1502.pdf

What's awesome is that it notes under 'Features":

Digital input formats:
-  NTSC and PAL video (support rectangle and square pixel variants)
-  BT656, with sync information in SAV/EAV blocks (8-bit words @ 27MHz)
-  4:2:2 YCbCr (8-bit words @ 27MHz or 16-bit words @ 13.5MHz)
-  16-bit RGB (5,6,5) @ 13.5 MHz
- VESA VGA video
-  480p RGB/YCbCr with separate sync signals which Hsync, Vsync and Pixel
clock (Pclk) (24-
bit words @ 25-36MHz).
-  Serial wire interface for YCbCr video input source

While I haven't gone too much into the specifics for it yet, it appears that
it shouldn't be too difficult to rewire the controller, or make a separate
board for the chip to take a VGA signal. Even if the driver doesn't take VGA
natively, I'm sure one of the Philips video decoders do!

The problem with this approach is that not only is reballing and remounting
BGA packages like the one found in the MyVu controller extremely difficult,
but there is no application circuit to copy and figure out how exactly this
chip will respond to our/my intended setup. This looks like an extremely
useful driver for a display, and despite the somewhat difficult
documentation, If we were able to source these, we could possbily have very
interesing display controllers produced, specifically tailored to wearable
applications!


Just an idea~
-Brian
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