I'm really sorry to bump a 4 year old thread, but every time I've found people discussing this issue, they've linked to this thread.
I've recently purchased the LG DM2780D from eBay and it came with the wrong glasses (the Cinema 3D ones) and I have experienced the purple ghosting. I've searched online to get the Monitor 3D glasses, but every time I've seen someone selling them they've been around £21 each!
If anyone here knows, I would like to ask if anyone can recommend where to get the correct glasses for cheaper, or if anyone knows of other glasses that are compatible with the DM2780D and where to get them?
Sorry again for bumping this thread, but this seems like the best place to get answers.
Thank you.