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Passive 3D Displays and Devices in 2020

Posted: 06 Oct 2020, 13:24
by CameraTraveler27
There a amazing amount of technical knowledge on this forum and after my research I'm having a hell of a time finding any 2D/3D displays that use passive 3D polarized glasses. Surely someone is still making them or are available in the aftermarket. The ideal device would be a either be 4K portable display roughly around 15" OR a Windows 10 tablet (or 2-n-1) with about a 15" 4K display. Any leads or keywords you can offer me to help find what I'm looking for would be very appreciated.

Re: Passive 3D Displays and Devices in 2020

Posted: 06 Oct 2020, 15:21
by Chief Blur Buster
For passive, there's a variety of small ones; stereoscopic (2-image) or "holographic" (full side-to-side parallax)?
https://www.magnetic3d.com/products/displays/
https://lookingglassfactory.com

Have you considered active 3D? They work on most high-Hz gaming monitors, with some hacks. Usually stereoscopic displays use a strobe backlight so you can commandeer a display's motion blur reduction mode to do the same thing. But a workaround can be simply sheer Hz -- a generic 240Hz panel can double as a 120Hz shutter-glasses display using software BFI (left-black-right-black frame sequence), using black frames for the shutter-glasses switch time. You will need a shutter glasses controller that can adjust phase/delay. This can be somewhat of a hacky solution.

Re: Passive 3D Displays and Devices in 2020

Posted: 08 Oct 2020, 15:25
by CameraTraveler27
Thank you! I took the time to research the two links you provided and unfortunately Magnetic 3D Displays only make glassesless displays and nothing around 15". Looking Glass is amazing but the kind of content that is compatible with their displays in more 3D models and not VR content. Looks like my best bet is to use active shutter 3D glasses with this 17" 120Hz TN LCD for my portable application. Specs I wouldn't have known to look for without your help so thank you. https://www.amazon.com/dp/B07YBV8RQM/?c ... _lig_dp_it

We also need to create a more stationary, large sit down Three monitor setup. Two final questions I have for you are can active 3D glasses work with a LED (not LCD) display if it's 120Hz? I ask because there are a lot more very affordable large LEDs rather than LCDs.

The other question is if VRR, G-Sync or FreeSync absolutely needed for a display when using Active shutter glasses or would the variable nature of these three technologies actually make the shutter glasses go out of sync with the display?

Re: Passive 3D Displays and Devices in 2020

Posted: 08 Oct 2020, 20:05
by Chief Blur Buster
CameraTraveler27 wrote:
08 Oct 2020, 15:25
Thank you! I took the time to research the two links you provided and unfortunately Magnetic 3D Displays only make glassesless displays and nothing around 15". Looking Glass is amazing but the kind of content that is compatible with their displays in more 3D models and not VR content. Looks like my best bet is to use active shutter 3D glasses with this 17" 120Hz TN LCD for my portable application. Specs I wouldn't have known to look for without your help so thank you. https://www.amazon.com/dp/B07YBV8RQM/?c ... _lig_dp_it
Try a 240Hz TN portable screen with a large blanking intercal (Vertical Total 2250) in Custom Resolution, to allow 120Hz refresh cycles to scan in only 1/240sec so your glasses shutter can be open for a longer period (4ms or so) on completed refresh cycles, since not all pixels refresh at the same time, www.blurbusters.com/scanout
- the need for fast GtG
- the need for a guard period (long VBI or strobe backlight) during eye change
- the need for less crosstalk
- the need for a brighter image.

I also provide consulting services on 3D glasses systems, see https://services.blurbusters.com and contact me mark@blurbusters.com .... as Present()-to-Photons expert ourselves, we can guide a business on such matters.

Refresh rate headroom is your best friend in reducing 3D glasses crosstalk for a non-strobed LCD

VRR is incompatible, unfortunately with active shutter glasses. In theory, passive 3D can be done with VRR.

There are many possible options, but also easy to go the wrong route because of a missed consideration.

Re: Passive 3D Displays and Devices in 2020

Posted: 09 Oct 2020, 12:28
by CameraTraveler27
Thank you Mark. I'm interested in purchasing some time for a phone consultation. I'm available today and just sent you a email with my details.

Re: Passive 3D Displays and Devices in 2020

Posted: 09 Oct 2020, 13:08
by Chief Blur Buster
Emailed. I'm already helping multiple 3D vendors on the confusing Present()-to-Photons black box.

Note: I prefer video calling, as I am deaf, and all my video software (Zoom, Skype, Discord) have closed captioning features or plug-ins nowadays.