Display Problem?! Or no problem at all?!

hey there!
have 2011 15" mbp hi res antiglare. works flawlessly until have discovered problem:
when wake mbp sleep, meaning opening again, (like once week, not often) there red glare kinda thing @ both sides of it. bad until put in password , lot better. goes away when close lid again , wake again. doesn't (as said, once week maybe) , has happened 3 times now. starting worry me, since warranty valid until 20th of june only. suggestions? can't take apple store right now, because of problem occurring not often. suggest? similar problems known?

 

i suggest getting camera, taking pictures next time happens, going apple store. if can't reproduce problem directly in store, show them pictures , see have say.

 

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