In this chapter we discuss haptic displays that can, under computer control, change their feel from slippery to sticky. These devices, most of which employ ultrasonic vibrations to modulate apparent coeﬃcient of friction, build on a long tradition of displaying haptic information through the control of lateral or shear forces. For instance, one of the earliest studies in the ﬁeld of haptics was Minsky’s [Minsky 95] sandpaper system. Minsky used variations in lateral forces through a joystick to create the sensation of a bumpy surface. The newer displays discussed here are similar, but can be touched by the ﬁngertips directly (thus, they might be considered tactile displays). In addition, they control only frictional resistance to ﬁngertip motion but do not have the ability to apply active forces to the ﬁngertips. Nonetheless, spatial and temporal modulation of friction enables these displays to emulate a wide variety of textures.
|Original language||English (US)|
|Title of host publication||Haptic Rendering|
|Subtitle of host publication||Foundations, Algorithms, and Applications|
|Number of pages||30|
|State||Published - Jan 1 2008|
ASJC Scopus subject areas
- Computer Science(all)