Can't say I have heard of anything causing that outside of a malfunction in the phone. Sounds like something's wrong with the hardware of the phone, specifically the screen. Thinking that's something where you MIGHT end up needing a replacement device, but hopefully I'm wrong and it's something else and someone may be able to help on that matter!
Every pixel is individual structure, so if you are having it uniformally then the problem is a hardware failure. I would take it in for a replacement. i dont want to say a screen replacement will fix it because the problem could be on the motherboard of the phone.
If you can send it to Samsung, don't get a Verizon replacement. I have went through 7 and they have all had screen issues. I've had that issue you described the green screen, in one of my 7 replacements. Please send it to Samsung its the only way you won't get screwed.