While reading about the night clock, I got the information that on past models, it was restricted to be used only by shots of 12hours at a time. There isn't that restriction on the S7. I read that in order to avoid burning in the screen, Always On shifts constantly the clocks' pixels ever so slightly so that the eye can't notice it. Does the same process applies to the night clock? I prefer its look to the Always On display, and would like to use it all day long. Is there a danger of burn in?