Apple still exploring haptic touch for iPhones, iPads   Patently
Apple  Haptic technology allows users to "feel" buttons on a
touch-screen device by providing localized feedback when users'
fingers touch button or control areas. A patent application
filed in late March showed Apple's version of haptic technology,
a process that would use piezoelectric actuators under the
display to provide feedback.  A new patent application,
uncovered by Patently Apple, shows that Apple is taking its
haptic inquiry a step further. Apple's new displays for touch-
screen devices would be flexible, allowing for a layer of the
screen to actually raise itself when a button or control area is
available for use.  This multitiered haptic system would allow
for an even smoother user experience, especially for users who
are visually impaired.  But Apple's system is much more advanced
than just raising a button. The displays Apple is envisioning
include the ability to flex and bend to the point of creating
multilevel topographical maps,