Popular IT channel Linus Tech Tip on 3D

[Just_Discovered_3D]

Originally Posted by trialobite

I think we’re pretty much in a agreement here, but if any prospective projector buyers read this thread, I would like to say that you will likely be sacrificing a LOT of quality to get those 2 projectors for a polarized rig, versus spending the same money on a single projector with active glasses. I’ve been running PJ’s for around 15 years, and recommend spending the top end of your budget on one high-quality unit. If your budget is $1000 (or any other arbitrary number) you’ll get much better performance, brightness, contrast, and black levels by spending that money on a $950 projector and $50 active glasses, rather than 2 projectors and the polarizer. There is such a huge jump from Home Theater projectors in the $300-$500 range, to the $1000 range, to the $3000-$5000 range. I fully agree with the rest of your post that for individual buyers, active glasses are convenient and easy to use. Unless you have an unlimited budget or plan on regularly doing showings for more than 4 people at a time, the best use of your budget is going to be on a higher quality single projector.

Personally I'm in a holding pattern on the pricier projectors as the neat new laser projectors are a complete no-go for gaming (2D or 3D), and no projector has yet broken the 60 Hz barrier for 4K. Supposedly they could currently display 4K 3D, with a software patch, which would be fine for me, but since it has not yet happened I'm holding off for that next evolution in projection.

Originally Posted by Jlardonio

If you have a lot of people, family(kids and grown ups) and/or friends, in a party or something like that that you want to show a great 3D movie... you think that with an projector/TV you'd be able to do it with those active glasses? Have to explain them to sync and some having inverted signal and to correct? Having all that hassle that the 3D experience would be good? Let's say, some 12 to 20 people, would you be able to project the movie to them all with glasses and not being most of the first minutes giving instructions so the glasses would be working normally? Would that be a good 3D experience? Some out of the picture and others having to be instructed about the use of the tech to watch a movie with the possibility of 1 pair or two not working?

I have 16 pair of glasses and i just paid for 1 pair, the rest was LG offers with the TV and a pair that the theater offered me. Even if i needed more it would be inexpensive and easy to get. And they would have just to put them on and watch, that really simple move.



And with light in the room? And your skin reflecting the light of the room and movie because of the intensity? Maybe you're mixing subjects... when i say that i lower the tv power to 10% i'm saying that the tv is so bright that i need it to be on that level to have an good experience like if i was in a cinema room even without the same conditions(black room and no lights) and you with your projector must have your settings that match the needs to work with your glasses that compared to passive glasses don't let so much light to pass and possible match with my TV intensity or close.

Like i said. People need standardization on 3D and passive 3D is a game winner. Maybe one day we'll have the autostereoscopic TV/projection to replace the glasses but until then the passive 3D is the most successful way to watch 3D for most of the consumers if we want the format to survive.

Explaining how to fix inversion isn't an issue that I have found because it does not happen often, and if it does happen it is inverted for everyone, so I'll see it and can fix it for everyone with the invert sync option on the projector.

For the glasses that have the Invert button on them, my experience has been that folks like to have fun clicking it. I know I have fun with it myself sometimes, as it can, particularly with at-home 3D conversions, have interesting effects.

Regarding light reflection, in DLP link mode the projector sets itself to a very bright output, which would cause reflection issues except the active glasses greatly eliminate it. They also enhance the contrast of the image. There's also a strong immunity to ghosting

On the glasses themselves, 16 pairs of active glasses would be an expense for sure. While they can be had cheaper elsewhere, glancing at US Amazon shows that it would cost between $180 and $292. Despite their increased weight, I am told by my prescription-glasses-wearing pals that wearing active glasses over their normal glasses is more comfortable than wearing the passive RealD glasses over their normal glasses. The RealD glasses have small lenses, thick frames, and are not ergonomic.

In the past you've mentioned clip-on passive glasses, which would be more comfortable than active, but wearing two pairs of glasses does not seem to be an issue.

Originally Posted by revgen

This article explains why DLP projectors don't suffer from crosstalk.



https://www.projectorreviews.com/hom...on-technology/

The best way to avoid issue #2 on DLP projectors is to use RF glasses instead of DLP-Link.

Thanks. RF glasses would be interesting for sure, since they do not deactivate themselves when looking away from the screen.

When my glasses have lost sync, due to scenes being too dark on a screen that might not be reflective enough, I still have not noticed ghosting, just a mild color shifting and the image turning flat.