Patent attributes
A new form of 3-dimensional display is provided, employing ultrasonic emitters and receivers that share hardware. The illusion of user interface elements are simulated within an Actuation Area by overlapping ultrasound emitted from different emitters at areas coinciding with modeled elements' surfaces. In some embodiments, the period and phase of the ultrasonic waves are varied relative to one another to create a more compelling simulation of object surfaces. Resistance to movement and haptic feedback are also provided in some techniques, more accurately simulating the actuation of objects. In other embodiments, also applicable to touch screens, the ultrasound hardware provides such haptic feedback in addition to finger or stylus location when actuating a touch screen display. A new method for determining the location and direction of finger or stylus actuation pressure is also provided.
