3D Vision Blog

A normal user's look into the world of 3D Stereo Technologies

3D Vision Blog header image 2

LG’s Dual Play Feature to be Available on LG Cinema 3D HDTVs

September 2nd, 2011 · 9 Comments · Other S3D Tech

At the IFA trade show LG is all about 3D technology and even their theme is “DO IT ALL IN 3D”, however one of the interesting features they are demonstrating seems to be getting less attention that in deserves (LG are probably a bit to blame for that as they are not releasing a lot of details about it yet). I’m talking about LG’s Dual Play feature that they are showing with a racing game and Xbox 360 console – essentially using the 3D features of the LG Cinema 3D TVs to show two different views in 2D to two persons playing a game in multiplayer mode. This probably already reminds you about the upcoming Sony PlayStation 3D monitor and the SimulView technology it will have to allow pretty much the same thing on LG’s 3D TV sets and Xbox 360 consoles. The approach however is a bit different for these two, since Sony uses active shutter glasses and LG passive, although they both rely on the 3D capabilities of the displays. And the end result is a nice to have extra feature that Sony will initially support on the PlayStation 3 console and the PlayStation 3D monitor only and it may require extra optimizations to ensure compatibility with specific games. With the LG implementation demonstrated on an Xbox 360 console the end result should be pretty much the same, although the quality may be a bit lower as compared to the active solution that Sony will provide…

The Dual Play feature has to turn a split screen multiplayer game into two separate views each of them seen only by the first or the second player, but not just any game that has split-screen multiplayer mode will do. Have in mind that each player must wear passive glasses with matching polarizing filters, so instead of the left and right filters with different polarization that are typically found in each pair of glasses, each player will wear a pair with either two left or two right lenses getting the same image with both eyes. And you can get to use that extra feature without actually having to get anything special, you can even swap the lenses on two pairs of normal polarized glasses that you got with the LG Cinema 3D HDTV and get the required Left/Left and Right/Right pairs of glasses. Then all you have to do is activate a game’s multiplayer mode (compatible with that function) that will split the screen in two and then set the TV to use this Dual Play function. You may think that it should also work by just manually activating the Top/Bottom or Side by Side 3D input and you will get two different views for each player, but you are forgetting that for this to work you need to send squashed frame output and with multiplayer split screen you get the full frame that is just cropped to fit your part of the screen, meaning that if you try to do that you will get a distorted frame. So if you thought that this extra function would be possible on all passive 3D HDTVs, then you will have to think again as things are not that simple as they may seem. But we’ll have to wait a bit more until LG releases more details about which of their 3D HDTVs will support the Dual Play functions and what other requirements will be there besides the more specific glasses…

Tags: ········

9 responses so far ↓

  • 1 Paul // Sep 4, 2011 at 23:01

    This feature is really allready in the 3d tv’s. To get this feature now with any passive glasses tv all you have to do is break the glasses into two and attach a left side with another left side. Then set the tv into top botto. 3d mode. With a active sutter the only way to do this is to close one eye :)

  • 2 Bloody // Sep 5, 2011 at 00:41

    Well, it should’ve been a new feature requiring compatible games that will support it by outputting the “proper” Over/Under output, so that the stretched image for the players will have the correct aspect ratio. However from the videos I’ve seen from the Dual Play feature in action it seems that the aspect of the image seen by each of the two players is a bit off, just like when stretching normal split screen multiplayer mode by manually activating the Above/Below 3D input mode on your passive 3D HDTV. So as the case is such you can indeed do that easily on any passive 3D HDTV, you just need to swap the lenses of two pairs of glasses to be able to see different views for each player.

    Here is a video of LG’s Dual Play in action: http://www.youtube.com/watch?v=nRgzIRPeSqc

    It is not that hard to get the same results with active shutter glasses, of course getting two pairs of them will be pricier than using cheap passive glasses. I’ve explained how this can be done with the 3D Vision active glasses, but it should be quite similar with other active glasses as well: http://3dvision-blog.com/modifying-the-3d-vision-glasses-to-show-2d-left-or-right-frame-only/

  • 3 dustytech // Sep 5, 2011 at 20:12

    We already did this like a month ago!


  • 4 Mikey // Oct 1, 2011 at 16:51

    All passive 3D TVs can do this, that’s right all even if it was the first to be sold. Now this is a game changer! Get it, GAME changer never mind.

    I’ll admit Sony came up with the idea of full screen split screen first. However why do you think they aren’t suing LG? This is what I think (1) Because the technology already existed. (2) Because they use different methods to get the same result. (3) Because Sony may win but hurt its image. (I’ll explain #3).

    Sony recently came out with the new 24″ PSP 3D TV, months after passive TVs were already being sold. Sony claimed that with this new technology 2 people could play any 2 player split screen game while having the ability for each player to see a full screen. So in actuality Sony was trying to sell you new technology that already existed in all current and previous 3DTVs. So not so new technology.

    But if you want to be able to do this on your current active 3D TV. (1) You have to tinker very carefully with your active shutter glasses, voiding their warranty and possibly breaking them. (2) Wait till Sony or some other active TV manufacture makes special glasses that sync with your particular TVs model. It’s not guaranteed that Sony will do this for all their previous models, considering there are so many. Sony would rather sell you another TV then help update your old one believe me. Even if they did make special glasses though you would still be paying for more expensive active shutter glasses.

    So, once again Passive wins.

    (To active 3D supporters) Na-na na-na boo boo stick your head in doo doo!

  • 5 MCF3778 // Nov 16, 2011 at 06:35

    Just make it possible to plug in any 2 TV’s like dual monitor video cards…. 3D is not for me and I will never pay extra for a niche idea that I will never use!

  • 6 Dave F // Nov 19, 2011 at 16:18


    So just to confirm, 2011 LG Passive TV’s will do this as well?I bought the 55LW5600 at Futureshop and was promised that this feature would work on the TV. However, when I call LG they have no idea if the feature will work or not? Are you sure this will work on the 55lw5600 as long as I flip the passive glasses to left-left and right-right?

  • 7 Santa // Nov 23, 2011 at 15:24

    Dave F.

    Dave … did you try out if the lensswap worked on your LW5600?
    Because I would like to buy the LW659s … and it would be nice to know if Dual Play works on older LG Tv´s then the LW980 Series

  • 8 John // Dec 6, 2011 at 19:19

    What do I need, to display two different images in a setup with a 3D Display (active or passiv) and a computer? I understand the described technology, but not the cabling and the computer/software side.

  • 9 Crags // Feb 19, 2012 at 20:46

    the dual play defo works in all LG Cinema 3D LED TV`s though only the LW980T comes with the dual play glasses all the other models are extra(available on ebay or make your own as shown in the UTUBE video, http://youtu.be/jj5jwIQI8rY ) just goto 3D mode and select the up/down or left/right split screen option respectivly and viola it works.

Leave a Comment