Screen backlight is too bright on half the display (replacement)

I just replaced the whole display assembly on a 2012 A1466 MacBook Air, the backlight of the screen is really bright and noticable but only on half of the screen, the weird thing is, at times when i boot it up, it does not happen.. but only with the brightness to the max. Then computer goes to sleep, and on wake up it is really noticeable again. Not sure if it is something I can fix myself. Any suggestions?

Pictures of problem