> 20 years ago, StereoGraphics in San Rafael was
NOT getting rich on their
> "Crystal Eyes" LCD shutter glasses. They were using SGI workstations at
On Wed, 6 Oct 2010, Tony Duell wrote:
Around then (I think it was 1988)(, I got to try a 3D
imaging system
using LCD shutter spectacles. The flicker drove me mad (it was very
noticeable), no way could I have worked with that for very long. I
assume they've increased the frame rate by now.
There seems to be a lot of variation in how much flicker people can or
will put up with. That's why SG went for the 120Hz, instead of the [at
that time] much more common 60Hz. Do British TVs have a 50Hz flicker?
SGs financial problems were not primarily technical. They arose from such
behaviors as listing investments as "income", and a relaxed "California
style" corporate culture that included "working from home" by employees
with jobs inappropriate for that, such as receptionist.
I do have a couple of sets of LED spectacles and the
(fairly simple)
control unit for use with muy E&S PS390. One day I must get round to
getting all that working again...
OK, I understand the principle behind LCD shutter glasses. And they
certainly were a major step up from Lipton's original spinning wheel.
But how do LED spectacles work?
--
Grumpy Ol' Fred cisin at
xenosoft.com