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Topic: 3D On a High-End Laser Projector
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Joined: Aug 21, 2023
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Hello everyone. Being fairly versed in video projectors for many years, recently after acquiring a prosumer 3D Panasonic HDC-Z10000 camera, I became fascinated with shooting and viewing 3D content. Its ironic this happens now, years after the 3D craze already ended and at a time that just about everyone (and almost all manufacturers) have totally forgotten about it. I have some doubts that Id love some experienced advice on since (honestly) 3D is all new to me and I really have no idea what I am doing.

For a couple years I've been using an Hitachi LP-WU6500 DLP 5000lm laser projector in my main screening room that has become one of my favorite projectors of all times and that I feel was largely ignored at launch and still today is underrated (now already out of production). This 3D ready machine (that till now of course I've only used to watch 2D content) has a plethora of 3D features and playback capabilities (Frame-pack, SBS, Top-Under, etc) and, as far as I can tell, is DLP Link ready.

My first question set is, DLP-Link means that the unit has a built-in DLP-Link compatible emitter and that all I need is pairing it with DLP-Link compatible glasses? I ask this because I see no "antenna" or anywhere specifically on the projector itself where the signal is supposed to come out from and I wonder if I need to be near or in-line with the unit for the signal to even work. That said, are all DLP-Link glasses the same and they will all work no matter the name brand, after market brand or "cheapo" no brand at all?? And are there "better" glasses, aka more responsive or "brighter" (as I know lack of brightness being a potential issue of 3D projection) or are they basically all the same as all feature the same underlying tech?

And finally my second (and last) question set. Even though the projector is advertised as "3D Ready" with DLP-Link built-in and no need for any external 3D transmitter, on the unit's back there happens to be a VESA connector labeled 3D Sync. Now, am I correct in assuming that a 3D Sync VESA connector is specifically to connect an external 3D transmitter (which is what all of the projector literature tells me specifically there is no need for)? Is it maybe because using a 3D Sync external transmitter (that I assume is to connect RF 3D glasses with) is for those who prefer that to using the built-in DLP Link and compatible glasses feature? If so, is there any benefit (better range/ better transmission signal/better image quality) than DLP-Link? And similarly are there "better" RF glasses, or basically they are all the same no matter the brand or off-brand?

What I have been asking myself (since I still dont have any 3D glasses of any kind) is why a projector has two 3D glass systems and what is the benefit or downside of each. Plus, I have been looking into 3D Sync external transmitters, and they are extremely difficult to find available for purchase and/or are ridiculously expensive.. the RF glasses on the other hand seem to be widely available and fairly inexpensive.

All in all, some pointers in the right direction would be greatly appreciated before I start messing things up, buy gear that I absolutely dont need, or end-up with a bunch that will not even work properly at all.

Thanks in advance for guidelines or recommendation on this as your experience and knowledge hopefully will balance my (still) total idiocy
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You have the general idea of it.

DLP Link actually uses the speed of DLP chips to insert a 'flash' of a full frame of color, sometimes white, sometimes red or something else, between the left eye frame and the right eye frame when it appears on screen.

Left eye frame, white flash, right eye frame, white flash, repeat.

The glasses have a sensor on the front which picks up the flash and syncs to the flash. Going completely 'dark' when the flash is on the screen. The glasses should completely block out the white flash.

SHOULD

Not all glasses are the same and yes, some do a better job blocking the white flash than others do. I have no idea today what glasses are better at this than others. You can also lose sync if you turn your head away from the screen since the sensor on the front of the DLP Link glasses won't be picking up the white flash.

If you take off your glasses and look at the screen while 3D content is being played back, you should see it notably whiter, or perhaps with a red tint, over the entire image, and that's the 'flash' which you are seeing.

It all is happening at 120hz or possibly faster on screen depending on what content you're playing back.

I've not run into DLP Link glasses which haven't worked with my BenQ w1070 projector.

Yes, there are RF sync emitters. You would need to dig into some reading at AVS Forum to really get information on what has been out there. I would think maybe a company like XPand, if they still sell stuff, might have a RF sync emitter you can plug into your projector if you wanted to try RF 3D glasses. I have no experience with 3rd party RF glasses.

I have used the RF sync emitter that JVC sells with a couple JVC projectors, and they have been seamless when used with JVC glasses.
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