Could be an app or theme that's causing this issue Any update for this phone would only really consist of security patch update Try going into the phone app and dial *#0*# At the top you will see three different coloured test cards If the lines dissappear on those test cards. Then you will have an app or theme that's causing the problem.
You can always try wiping the Partition Cashe on the phone. Tends to help clear out the old cookies and data that could be causing the problem
There was a article in Sammobile site about this issue effecting your model after updating the software update and it was claimed that Samsung is reported to say that they will do a new screen replacement for free and you would need to contact Samsung support for further advice on this matter. Samsung had acknowledged that it was the software update causing this issue.