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Vibrotactile haptic feedback devices

  • US 6,693,622 B1
  • Filed: 08/18/2000
  • Issued: 02/17/2004
  • Est. Priority Date: 07/01/1999
  • Status: Active Grant
First Claim
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1. A haptic feedback device for providing vibrotactile sensations to a user, said haptic feedback device coupled to a host computer and comprising:

  • a housing grasped by said user;

    a first actuator coupled to said housing;

    a mass, wherein said mass can be oscillated by said actuator, and wherein a coupling provided between said first actuator and said mass or between said mass and said housing has a compliance that can be varied, wherein varying said compliance allows vibrotactile sensations having different magnitudes for a given drive signal to be output to said user grasping said housing, wherein said compliance is provided by a flexure coupling said mass to said housing, wherein said first actuator is grounded to said housing and moves said mass which includes a magnet; and

    a second actuator, said second actuator being grounded and providing a magnetic force on said mass to provide a variable tension in said flexure.

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