In early 2013 we reported that Apple had recruited a former senior researcher at LG Display, Dr. Lee Jeung-jil, who was in charge of researching OLED printing technology. So it's obvious that Apple is staying on top of this technology so that they can bring this to market when the time is right. To date Apple has several OLED inventions on record (One, two and three). Apple's current invention clearly acknowledges that OLED has better contrast ratios compared to LCDs while continuing to invent supporting technologies to correct certain OLED weaknesses and/or to fine tune the technology for specific applications or devices. Today's patent application relates to processes for realizing a variable optical path length for one or more microcavities in an AMOLED display. In the shorter term, we reported earlier this week that Apple placed orders for new power reducing Oxide LCD Displays for next year's iPad Air.