Quick and dirty: "The patent describes an invisible infrared sensor integrated into mobile iOS devices with a built-in camera — which includes iPhones, the iPo

Quick and dirty: "The patent describes an invisible infrared sensor integrated into mobile iOS devices with a built-in camera — which includes iPhones, the iPod Touch and iPad 2. As the Apple patent explains, an infrared sensor in a mobile phone could be used to search for another signal that would say whether it is O.K. to activate and record footage with the phone’s camera."