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Controlling Haptic Sensations For Vibrotactile Feedback Interface Devices

  • US 20090278819A1
  • Filed: 11/03/2008
  • Published: 11/12/2009
  • Est. Priority Date: 09/28/1999
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a housing manipulatable by a user;

    an actuator coupled to the housing and including an eccentric mass coupled to a rotatable shaft of the actuator defining an axis of rotation; and

    a circuit coupled to the actuator, the circuit configured to produce a control signal such that, when the control signal is received by the actuator, the actuator produces a force effect having a magnitude and a frequency by rotating the mass about the axis of rotation in a first direction, the magnitude of the vibration being based on a duty cycle of the control signal and being independent of the frequency;

    an obstacle member coupled to the actuator, wherein the obstacle member is a spring member including a compliance portion configured to increase energy in the movement of the mass in a second direction opposite to the first direction when the mass comes into contact with the obstacle member.

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