Verified differences between 3D glasses - AVS Forum
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Old 04-14-2012, 03:32 PM - Thread Starter
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I don't know how much this has been covered here if at all, but I wanted to relate my findings between 3D glasses on Panasonic VT30 plasmas using the TV's 2D to 3D conversion.

I initially compared the Panasonic glasses with an aftermarket set from Dimensional Optics. This was before I calibrated or made any adjustments to the TV's 3D mode other than selecting a particular picture mode. At this point, looking at a gray ramp with no glasses, white balance looked horrible, as expected, with purplish white tones and bluish dark grays. This is common for 3D mode with no glasses on.

Then I looked at the test pattern through the glasses. I double checked to make sure they were on, and there was no doubt they were as the image darkened after pressing the power button and my laptop screen flickered when seen through the lenses. With the Dimensional Optics, the gray ramp still looked terrible, with a very strong blue emphasis at the low end. The high end looked poor as well, though not to the same extent. With the Panasonic glasses, the glasses seemed to filter out the blue emphasis in the dark grays, and the white balance looked better.

Then I measured each pair, taping them one at a time in the optical path of my Jeti spectroradiometer. I triple checked to make sure they stayed on throughout the measurements. The results can be seen in attachment #1. The difference is dramatic.

I tried to calibrate with the aftermarket glasses, but the inaccuracies were too great to correct for without severe side effects. However, I was able to calibrate with the Panasonic glasses and achieve great results (attachment #2).

Since then, on yet another VT30, I've had similar results, but this time with True Depth 3D aftermarket glasses.

 

Donald 3D glasses comparison.pdf 264.4853515625k . file

 

Donald ISF Day 3D.pdf 264.11328125k . file
Attached Files
File Type: pdf Donald ISF Day 3D.pdf (264.1 KB, 34 views)
File Type: pdf Donald 3D glasses comparison.pdf (264.5 KB, 59 views)

ISF/THX calibrator with Jeti 1211 reference spectro
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Old 04-14-2012, 07:34 PM
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Great post! Many have commented on 3D calibration, but to my knowledge none have actually attempted it, let alone posted results. It's good to see measurable results.

Thanks, Chad.

"The wise understand by themselves; fools follow the reports of others"-Tibetan Proverb
 
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Old 04-16-2012, 05:34 PM
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Thank you very much for this thread. I will post more with pictures when I have time. I have a 2011 Mitsubishi RPTV and notice severe "color/tint-shift" with 'cheaper' 3D glasses at even the slightest off angle viewing and terrible color banding in animated movies with fine color gradients of sky and flesh tones. The Mitsubishi branded Xpand glasses don't have these issues (off angle color shift is way, way less to the point I never noticed it until I saw it on the cheaper brands you mentioned (I own both) and tried looking for it. The Mitsubishi branded glasses don't alter fine color gradients either.

Again, more findings and pics to follow. Can't believe the makers of these glasses and other owners of them haven't noticed or said anything about this.
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Old 04-16-2012, 06:39 PM
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I have the XPAND 3DGX103 branded "For use with Mitsubishi TVs" (come in Mitsubishi branded packaging), 3ACTIVE Model: A1S01263 3D glasses for 2011 Mitsubishi HDTV's with built-in emitter (just got these) and TrueDepth 3D glasses for 2011 Mitsubishi HDTV's with built-in emitter (pretty sure they come from the same OEM Chinese factory as the 3ACTIVE glasses).

The TrueDepth and 3DACTIVE both seem much lighter than the Xpand and both are less expensive. However, the lens of the Xpand are much more uniform (will try to post pictures and explain what I'm talking about but I'm finding it hard to photograph reflections). 3D and syncing are great on all three brands. Only the TrueDepth and 3DACTIVE have the extreme color shifting and banding (not all material, live action [that I've watch so far] looks OK but the issue is still there even if it's not seen at the time). This appears more in (but not all) animated material with fine color gradients: so far way more in Despicable Me and way less in Toy Story 3 for example.

Pictures to follow.
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Old 04-16-2012, 06:43 PM
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1st picture without glasses, 2nd with 3DACTIVE/TrueDepth, 3rd with Xpand. Note the column in the back right, also note that the blue balloon animal looked worse in person.

WTF - you get what you pay for.
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Old 04-16-2012, 06:50 PM
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Note the glasses have no issue with the flesh tones in Toy Story 3 but check on the curtains on the left. Despicable Me looks terrible in pretty much every seen with people characters and/or sky. None of these issues appear with the Xpand glasses.
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Old 04-16-2012, 06:54 PM
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Here is a last comparison. Note the sky gradient on the left (again, much worse in person and in different scenes of sky) and the guys face.
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Old 04-16-2012, 06:58 PM
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On to color shifting. With the 3DActive and TrueDepth, slight turns of the head up/down or left/right produce the following effects to my eyes and the image's perceived color/tint:

Up/Right - Less Green, More Blue
Down/Left - More Green, Less Blue

The Xpands too have some color shift to be fair but it is ONLY notice at the extremes of off angle viewing and ONLY once you've seen what the 3DActive and TrueDepth do and already know what to look for.

On a side note, I also have some TrueDepth DLP-Link glasses. The HDTV goes into a different "green tinted" mode that the glasses compensate for (turning blacks that have turned greenish back to black for example) but off angle (head turning) views allow the green to come through.

P.S. Despicable Me had been my unofficial 3D test disc ever since it helped me spot the newly released (back in August 2011) Mitsubishi WD-92840's 3D issue that was later fixed with a firmware update.
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Old 04-16-2012, 07:14 PM
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Under a bright fluorescence (not incandescent) light, you can (IN PERSON) clearly see a nonuniform "rainbow-ish" layer on the surface of the lenses that the Xpands do not have. I could only ever photograph it with my phone's camera and even then they didn't turn out that great but I attached them anyway to give some kind of example of what I'm talking about. You can probability see it better just by looking at the thumbnails unopened as the originals are blurry and pixelated.
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Old 04-17-2012, 05:00 AM
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Just cleaned and looked at the lenses on my True Depth glasses(under florescent lighting).I see,light pink and green areas on the lenses on the front side and dull greenish grey on the inside.As I move the glasses and view the front,the light pink and green blotches change from uniform pink to uniform green.None of the 3D viewing I've done so far have produced any of the effects seen in your photos.The tv screen is darker overall when viewing 3D in general(tv has settings for this).While viewing the Masters I did not notice any color shifting when turning my head.
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Old 04-17-2012, 06:00 AM
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Thankfully the 3DActive and TrueDepth glasses don't do the above for all material/colors, except for the color shift. Hopefully most people are looking directly at the screen though. Just don't turn to talk to someone else in the room. ;-)

Maybe I got 2 random glasses made by 3DActive and 2 random glasses made by TrueDepth that have the exact same issues while you lucked up and got a 'good' pair?
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Old 04-19-2012, 05:33 AM
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Ok,guilty....I do turn my head to converse with others in the room while viewing 3D.That was not mentioned in the instruction manual?
I checked the 2nd pair of glasses I own and they're like the first pair.I am watching a new Sharp tv and wondering if its the tv itself giving you the artifacts your seeing?I don't think I'm the only one that got the 2 "good" pairs of glasses.Is there a blu-ray disc that has some form of test patterns for checking the aspects of 3D glasses,curious? : )
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Old 04-19-2012, 11:25 AM
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I would think it's the glasses and HDTV together and only those combinations as the Xpand X103's don't do it (X104 don't either - briefly had a chance to check a pair of them). My post above clearly mention the HDTV involved. The glasses (3DActive and the TrueDepth) are model/versions made expressly for the Mitsubishi 2011 840 series and don't work with Sharp HDTV's.
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Old 04-21-2012, 02:59 AM
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I understood which glasses and tv you are using.When I saw your photos I thought holy cow,something is clearly wrong there.I just got all the 3D stuff and if it looked like anything in your photos I probably would've returned it.Its strange the Truedepth glasses work good for the Sharp tvs and not the Mitsubishi?I don't think it has anything to do with the prices of the glasses,but the way they work together(as you said).It would be interesting to know if this happens with LG,Samsung,Sony or other manufacturers sets.
Just trying to say the Truedepth glasses work good for the Sharp equipment,why your seeing what you are on the Mitsubishi is anyones guess,rather odd.Good thing you picked up the Xpands!
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Old 04-21-2012, 08:41 AM
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What is truly amazing are the good reviews of the 3Active and TrueDepth Mitsubishi glasses. Either the reviewers are new to 3D, haven't watched many 3D movies before posting a review (they surely haven't watched Despicable Me) or they are not as critical viewers as they think the are.

The color shift is really not that big a deal, it's just WAY more pronounced with both brands and took me a little by surprise (again, no review mentioned it). ALL (everyone feel free to research this point online) active 3D glasses have a slight color 'difference' (as compared to what you see from the screen without them own) and a variance between the lens (to help separation of the two images).

These glasses produce some sort of color banding apparition with certain color gradients. Most scenes and images are fine but when certain sky, skin tone or other particular color gradients appear, so does the color banding. Just re-watched The Green Lantern 3D and I would say about 95% of the film appeared OK through the 3Active/TrueDepth Mitsubishi glasses. There were some scenes of the sky with the sun set low, one flash of green from the ring, etc. that showed the color banding. Note that in motion, sky scenes with the color banding appear somewhat unsettling as the camera moves and the bands move about and undulate around. Also, note that I have some TrueDepth DLP-Link glasses that have none of these issues (of course DLP-Link has that whole image green tint thing going and I prefer not to use DLP-Link).

I personally just wanted a different pair of glasses for myself that were different from the Xpands I hand out to guest. The 3Active got me thinking rechargeable. Oh well.

I'm keeping both brands. They are both light weight, sync fast and comfortable. Most live action movies have and should appear OK through the majority of scenes. Computer animated movies could or could not be an issue depending on the color gradients used in each scene (color banding will definitely more likely appear) and how many scenes total that will bring out the issue. I didn't re-watch Toy Story 3 from beginning to end but it appeared it would be OK overall. Some DirecTV 3D shows had some banding and I'm sure some Xbox 360 and PS3 3D titles would also: again depending on if they have certain color gradients that set it off.

For everyday use, I could see using the 3Active and TrueDepth as they do feel good wearing them both. But for 'critical' movie viewing in which I don't want to be thinking "is there going to be color banding in this scene?" all the time in the back of my head, I'll be using the Xpand X103's.

I will definitely give the 3Active and TrueDepth glasses out to guests as most have never appeared to consider themselves critical viewers like the reviewers of both glasses all over the web.

I did post a review of the 3Active glasses on Amazon and tried to link here but they removed the link.
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Old 04-15-2013, 06:06 AM
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I know this thread is a year old but I was wondering if ChadB had any further findings based on his experiences over the past year.

Since I am having a Sharp LC-80LE844U delivered on Thursday and will eventually contact ChadB for a calibration, I am interested in how Sharp's 3D glasses (AN-3DG30) compare to other manufacturers on this set.

TIA,

Bob
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