Default Screen help pliss

Hey guys,

Please help me for resolving my screen. Everytime i reboot or shutdown my phone the screen its like not the best resolution, seems like blury or something. but after i lock and unlock the phone the screen went back to normal. Whats happening with my screen? Its really bugging me. i attached a screen shot so if anyone can see

Thankyou

Sent from my GT-I9500
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