07218310 is referenced by 111 patents and cites 75 patents.

Method and apparatus for providing high strength, low frequency tactile sensations using an inertial actuator in a haptic feedback interface device, such as an actuator driving an oscillating inertial mass. A commanded low frequency is modulated or combined with a higher frequency at which the tactile sensations feel stronger, where the resulting signal is used to output a tactile sensation at the higher frequency and convey the commanded low frequency to the user. One embodiment provides higher frequency pulse bursts at the desired low frequency wherein the higher frequency pulse bursts are at or near a resonant frequency of the actuator; other embodiments modulate or otherwise vary the amplitude of the higher frequency signal according to the desired low frequency.

Title
Providing enhanced haptic feedback effects
Application Number
9/908184
Publication Number
7218310 (B2)
Application Date
July 17, 2001
Publication Date
May 15, 2007
Inventor
Alex Goldenberg
Mountain View
CA, US
Adam C Braun
Sunnyvale
CA, US
Kollin M Tierling
Campbell
CA, US
Agent
Thelen Reid Brown Raysman & Steiner
Assignee
Immersion Corporation
CA, US
IPC
G06F 3/00
G09G 5/00
View Original Source