mur@. wrote:


There are these:

https://www.bestbuy.com/site/nvidia-...CABEgJUuvD_BwE

but don't know if they'd work for what I want. They say they're wireless, but
what transmits the signal?

Those are similar to these. This is not what the glasses
do, but the concept in this article shows how you can
do stereoscopic projection. The Nvidia glasses are
a variation on the "View Master" concept of glasses.

https://en.wikipedia.org/wiki/Anaglyph_3D

The NVidia glasses are some sort of liquid crystal shutter.
One eye is blacked out, during one frame of the LCD screen.
Then, the glasses switch and the other eye is blacked out,
and a second frame presented on the LCD screen. The
presentation of the two different images, one for each
eye, and the persistence of vision, gives "fake 3D".
The objects in each image have to be shifted slight
to give "depth" in the human brain.

It requires a display with a 2X refresh rate.

At one time, there was a connector on the video
card faceplate, with a logic signal to switch the
glasses back and forth. This synchronizes what the glasses
are doing, with the screen updates.

It requires that the correct NVidia driver is loaded,
plus a means is needed of wiring up the glasses.

Because LCD screens have "latency" from connector to
screen, some adjustment may be needed, to temporally center
the presented images, with the blanking of one eye on
the glasses. Some LCD monitors have a thru-delay of
four frames (a *long* delay). CRTs don't have a delay
for processing, from VGA connector to the screen. CRTs
only go that fast, if you drop the resolution setting.

So those glasses don't present a display, they just modulate
the light so that each eye sees a slightly different image,
and it allows 3D presentation as a result. It's similar
to red/green glasses, only without using gel filters.
And requires L-R-L-R sequence of LCD monitor images
by the video card. The NVidia driver knows how to do
that. The application also has to know you want that,
to feed the correct data to NVidia.

The glasses can be used for Mechanical CAD, to review OpenGL
3D images of solid objects, in eye-popping projection. You
can view a rotating tea pot, and the "spout" pokes out
of the screen at you.

If the glasses had a battery in the frame of the glasses,
and the glasses used Wifi for the sync signal, this would
make the glasses wireless. This allows more freedom when
sitting at your desk.

*******

http://www.nvidia.co.uk/object/3d-vi...nology-uk.html

Requirements include: 120Hz monitor.

The majority of consumer monitors are nominal 60Hz type
and unsuited to this. Dropping the effect to 30Hz is a bit
disturbing (first person shooter latency, reduced game framerate).

http://www.nvidia.co.uk/object/3d-vi...ements-uk.html

There is at least one gamer monitor rated for 144Hz refresh,
so it would be fast enough. The 144Hz monitor uses a TN panel
as far as I know. Such a monitor only has correct colors,
if you sit centered in front of the screen.

This idea has always been a "fringe" thing, for people with
money to waste :-) I don't know if there is nausea or not.
You'd need to find a review on the web, to learn more.

I don't even know a good technical term for these. They're
not really Anaglyphic, and they should not screw up the
color. But the idea is the same, to fool the human brain,
with two different visual fields intended for stereoscopy.

Paul