Laura Winfield

US Patent:

20070236450, Oct 11, 2007

Filed:

Mar 21, 2007

Appl. No.:

11/726391

Inventors:

James Colgate - Evanston IL, US
Michael Peshkin - Chicago IL, US
John Glassmire - Chicago IL, US
Laura Winfield - Evanston IL, US

International Classification:

G09G 5/00

US Classification:

345156000

Abstract:

A haptic device provides indirect haptic feedback and virtual texture sensations to a user by modulation of friction of a touch surface of the device in response to one or more sensed parameters and/or time. The sensed parameters can include, but are not limited to, sensed position of the user's finger, derivatives of sensed finger position such as velocity and/or acceleration, sensed finger pressure, and/or sensed direction of motion of the finger. The touch surface is adapted to be touched by a user's bare finger, thumb or other appendage and/or by an instrument such as a stylus held by the user.