Apple Reveals Wildly Intelligent Multi-Tiered Haptics System

from www.patentlyapple.com:

>>Tiered Haptics Could be applied to Flexible OLED Displays Including Video Glasses

According to Apple, the display screen noted in FIG. 10 may be any suitable type of display screen which may allow haptic interaction. For example, in some embodiments, the display screen may be a flexible organic light emitting diode screen (OLED), a graphene sheet, or any other suitable flexible display screen or any suitable combinations thereof. In some embodiments, display screen 1002 may be substantially inflexible, and may not form contoured screen surfaces. In some embodiments, display screen 1002 may include a protective cover such as, for example, clear plastic (e.g., Lexan) or any other suitable substantially transparent material. Common usages of Lexan include space and sports helmets, clear high-performance windshields and aircraft canopies, and bullet-resistant windows. 

 Update May 4, 2012: The video below covers the basics of Haptics that may be of interest to some.