I have had this purple ghosting issue too with the LG DM2350D TV/Monitor. I wrote this on another forum about the FPG-200F glasses that came with it
I did some tests with the clip on glasses and if you rotate the lenses about 45 degrees anti-clockwise, the purple ghosting disappears and there is only a slight ghosting visible from time to time. As I don't use the clip on glasses normally I've loosened a screw on each lens so that I can adjust them. As this is far from ideal, I may even go further and try and fit them inside a pair of used RealD glasses or even a pair of anaglyph glasses of which I have dozens. It's a definite improvement when rotated though. Basically, every time the purple ghosting appears (especially when in the background) it takes you out of the 3D illusion instantly as you become consciously aware that the background is in fact "the screen", rather than giving the illusion that it is in the distance and behind the stereo window. This reduction of the purple ghosting means that you can watch the 3D as it is meant to be viewed. Interestingly, I have noticed that those 3D scenes which have been properly produced don't get any purple ghosting at all. Even some scenes that I have watched that have a huge disparity don't display any purple ghosting at all. Can anyone explain why this is? Why isn't the ghosting evident all the time?
I have been in contact with LG and after telling them the screen's serial number and forwarding a "proof of purchase" invoice I am hoping to receive a new pair of glasses. Now, the worrying thing is that after I gave him the serial number, the LG rep came back to me later and said the correct glasses are...and then gave me a long number. So does that imply that the original glasses in the box where incorrect then? More like they were just a bog-standard pair of passive 3D glasses rather than a pair that matched the LCD panel polarization. What a weird way to sell a 3D TV.
Now even though I am keeping my 3D TV as overall I really like it and enjoy the fact that I can now watch Blu-ray 3Ds, LG, as a company have proven to be pretty unreliable. Here are my experiences with them....
1) I first bought the LG D2342P but there was a problem when viewing Blu-ray 3D...the image was all juddery and unwatchable. Also, LG had neglected to include a monitor stand in the box. After several phone calls and lots of hassle between LG and Play as to who's responsibility it was to replace the screen, I finally sent it back to Play. That happened only after I threatened legal action with the Play customer service....boy have they gone downhill since the takeover. Meanwhile, during all of that, LG sent out the missing part when I didn't need it any more. That was the first bad experience.
2) I decided to buy the LG DM2350D instead from Amazon and I just want to say that they are a superb merchant...no hassles whatsoever and a clear statement of their return's policy. For a few weeks though I noticed these brightness fluctuations while watching Blu-ray 3D. At first I ignored it thinking it was the disc or player but after a while it became unwatchable. It really was distracting and there was no mention of how to adjust the settings to clear it up etc. I spoke to the LG rep and he had "no knowledge" of this issue. In the end I solved it by changing the settings to either "Expert1" or "Expert2" which have some ISF logo next to them. Now that might seem like ignorance on my part but why isn't this "brightness fluctuation" or "dynamic iris" mentioned in the manual at all? It is a very noticeable phenomenon and I couldn't imagine anyone wanting to watch anything in that way, with every scene brightening and then darkening. It's really distracting.
3) Finally, currently in the process of sorting out the 3D glasses issue as mentioned above.
Once I get these new glasses my 3D TV should be doing what I hoped it would do on day one when I spent my hard earned dosh on it. I'm happy now but boy has it been a long road for this 3D fan to get 3D in the home.
Now we just need the 3D content to improve. Roll on Hugo Blu-ray 3D(02 April UK release) and House of Wax at the end of the year hopefully.