Who amongst us knew that Apple had a secret retardation solution for their media players? Surely not I. But there it is in black and white, a granted patent for one of Apple's super secrets of how their display stays so crisp under the most demanding of circumstances. In case you didn't know, Apple's Engineering Team responsible for display and touch technology is as fanatical about their craft as Jonathan Ive is about Industrial Design. Two of the senior display engineer's on this team include Cheng Chen who has a PhD in Liquid crystal physics/optics and is behind Apple's upcoming iPad as is John Zhong who won an honorary award in 2009 from The Society for Information Display (SID) for his exceptional contributions to display technology. Today's granted patent presents us with a basic overview of this team's use of retardation film on media displays so that we could continue to enjoy crisp imagery even when we're wearing sunglasses. At the end of the day, Apple's granted patent may even provide us with a little reasoning behind Apple's recent move to ban protective screen film from the Apple Store.