Future iPhones May Have Always-On Display

Apple has patented a new display technology that will allow their iPhones to have always-on displays with almost no battery cost whatsoever. This doesn't mean the whole display would be lit at all times. In reality, only part of it would be activated using a secondary backlight system located under the main one. According to Apple, the objective is to give feedback to the user at all times, even when the main display is turned off:

http://gizmodo.com/5094416/future-ip...ays+on-display