4k with PASSIVE 3D - What's the current tech/offerings? - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 45 Old 05-10-2017, 07:05 PM
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It's 3840x2160p on both active and passive 4K because it upscales it to fit the screen but the source is only 1920x1080p so technically that's all it is.

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post #32 of 45 Old 03-17-2019, 08:20 PM
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Is there a big difference for passive 3D between 1080p and 4K sets? I'm looking at a Pansonic 47 ET5 for $150 or a LG 55 UH8500 for $425. Is it worth the higher cost for 4K 3D?

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Originally Posted by Irishdoom View Post
I had no intention of getting back in the TV market. I was happy with my main TV, a Panasonic TCL-ET5 55" Passive 3d TV. Well, out of the blue the other day it developed horizontal black lines all the way across. (I'm still looking into what could be causing this or what my options are - I'm almost positive I'm out of warranty though, as I bought it a couple years ago.)

Anyhow, I hadn't gotten into the 4k game and had no intention to yet, but with this development it might force my hand. The thing is I like having 3D as an option, have many 3D movies, and have NO interest in going back to 'active' 3D. Since I've been out of the loop for a couple of years, I'm not sure what the lay of the land is. I found one or two passive 3d 4k TVs, but it's hard to find them as sites don't seem to differentiate between passive and active. What are some current good offerings in this area (55 being likely my max size) and what is the price range I can get a set like this at? I see you can get a 55" 4k for dirt cheap, but the only passive 3D models I've seen are over $2k.

I've always found great recommendations here, so I thought I'd try again!
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post #33 of 45 Old 03-18-2019, 04:03 AM
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Is there a big difference for passive 3D between 1080p and 4K sets? I'm looking at a Pansonic 47 ET5 for $150 or a LG 55 UH8500 for $425. Is it worth the higher cost for 4K 3D?
Definitely get the 4K 3D set. The 4K Passive 3D sets are able to interlace the dual 1080p images so it's able to display both the Left and Right images simultaneously by interleaving the lines, so you get significantly less visual artifacts vs 1080p sets. On a 1080p 3D set it can only display dual 1080x540 pixels per frame so you lose half resolution this way. Ultimately this becomes noticeable as if there is a large visual difference in the image between Left and Right you can see it as aliasing (jagged edges, essentially) in the image. It varies according to the content you're watching however, but this issue is pretty much non-existent on 4K Passive 3D sets.
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post #34 of 45 Old 03-18-2019, 04:24 AM
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Choose a 4K/2160p 3D TV instead of a 1080p 3D TV! With a 4K/2160p screen, you do not lose any resolution when you view a 3D Blu-ray.

I have a 2K/1080p 3D TV and the half resolution can be seen if you know what to look for. But if you have lots of Half-SBS or Half-OU/TAB encoded files, a 2K/1080p 3D TV is just fine, since the source matches the display.
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post #35 of 45 Old 03-18-2019, 10:17 AM
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I have an option to buy a LG UB8500 from 2014. Still good even though it is older 4k?

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Is there a big difference for passive 3D between 1080p and 4K sets? I'm looking at a Pansonic 47 ET5 for $150 or a LG 55 UH8500 for $425. Is it worth the higher cost for 4K 3D?
Definitely get the 4K 3D set. The 4K Passive 3D sets are able to interlace the dual 1080p images so it's able to display both the Left and Right images simultaneously by interleaving the lines, so you get significantly less visual artifacts vs 1080p sets. On a 1080p 3D set it can only display dual 1080x540 pixels per frame so you lose half resolution this way. Ultimately this becomes noticeable as if there is a large visual difference in the image between Left and Right you can see it as aliasing (jagged edges, essentially) in the image. It varies according to the content you're watching however, but this issue is pretty much non-existent on 4K Passive 3D sets.
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Choose a 4K/2160p 3D TV instead of a 1080p 3D TV! With a 4K/2160p screen, you do not lose any resolution when you view a 3D Blu-ray.

I have a 2K/1080p 3D TV and the half resolution can be seen if you know what to look for. But if you have lots of Half-SBS or Half-OU/TAB encoded files, a 2K/1080p 3D TV is just fine, since the source matches the display.
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post #36 of 45 Old 03-18-2019, 11:50 AM
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UB models have worse crosstalk, def. get the UH model if you can but UB is still pretty good as long as you don't sit too close. I have a 49" model. Need to be at least 8 eight feet.

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post #37 of 45 Old 03-18-2019, 08:22 PM
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I have an option to buy a LG UB8500 from 2014. Still good even though it is older 4k?
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UB models have worse crosstalk, def. get the UH model if you can but UB is still pretty good as long as you don't sit too close. I have a 49" model. Need to be at least 8 eight feet.
I think Tomtastic's covered it. I'd go for the 2016 models as well, the UH85/95 models support HDR/DV so if you're in for 3D you should just get the last generation of TV's that supported it even if it costs a bit more upfront. If you can get an OLED series 6 (C6, E6 or G6) that's also an excellent choice but need to beware Image Retention/burn-in if you are buying 2nd hand as well as while you're using it (need to show colour slides to reveal it however + any polariser misalignments).
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post #38 of 45 Old 03-19-2019, 01:17 AM
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I have an option to buy a LG UB8500 from 2014. Still good even though it is older 4k?
UB8500 is good, but UH8500 is better because supports HDR10 and Dolby Vision.
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post #39 of 45 Old 03-19-2019, 01:57 AM
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I have a X900F as my main already so was just looking at a tv for good 3D. So the LG UB8500 is solid for 4K 3D blurays? The UH sold already.

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I have an option to buy a LG UB8500 from 2014. Still good even though it is older 4k?
UB8500 is good, but UH8500 is better because supports HDR10 and Dolby Vision.
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post #40 of 45 Old 03-19-2019, 02:17 AM
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I have a X900F as my main already so was just looking at a tv for good 3D. So the LG UB8500 is solid for 4K 3D blurays? The UH sold already.
Yes, UB8500 is OK for 3D. You can test the TV set before you buy?
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post #41 of 45 Old 03-19-2019, 09:09 AM
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Yes what should i look for to make sure 3d is working properly?

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I have a X900F as my main already so was just looking at a tv for good 3D. So the LG UB8500 is solid for 4K 3D blurays? The UH sold already.
Yes, UB8500 is OK for 3D. You can test the TV set before you buy?
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post #42 of 45 Old 03-19-2019, 10:34 AM
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Yes what should i look for to make sure 3d is working properly?
With a pair of passive filter 3D glasses, sit right in front of the TV, dead center vertically and horizontally, at least 6-7 feet / 2 meters away with a 3D Blu-ray movie playing - you should see almost perfect 3D image, with no crosstalk between left and right eye or faint "ghost" images behind objects. Subtitles can reveal bad crosstalk easily.

The least the crosstalk and ghosting, the better the alignment of the FPR layer.

Some crosstalk and ghosting should appear if you move away from the dead center of the screen.

If you can't find any position without minimal or no crosstalk or ghosting - the FPR layer is misaligned and that TV should be avoided.
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post #43 of 45 Old 07-08-2019, 10:12 PM
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Update: I found a good deal on a E6 OLED. Looks great.

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Originally Posted by TC119 View Post
Yes what should i look for to make sure 3d is working properly?
With a pair of passive filter 3D glasses, sit right in front of the TV, dead center vertically and horizontally, at least 6-7 feet / 2 meters away with a 3D Blu-ray movie playing - you should see almost perfect 3D image, with no crosstalk between left and right eye or faint "ghost" images behind objects. Subtitles can reveal bad crosstalk easily.

The least the crosstalk and ghosting, the better the alignment of the FPR layer.

Some crosstalk and ghosting should appear if you move away from the dead center of the screen.

If you can't find any position without minimal or no crosstalk or ghosting - the FPR layer is misaligned and that TV should be avoided.
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post #44 of 45 Old 07-09-2019, 12:22 PM
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holy 2016 post batman!
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post #45 of 45 Old 07-09-2019, 08:21 PM
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Update: I found a good deal on a E6 OLED. Looks great.
That's a good thing. The E6 generally is the best 3D you're likely to get on a TV.
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