Computer graphics processing and selective visual display system – Display peripheral interface input device
Reexamination Certificate
2006-09-26
2006-09-26
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
C345S157000, C715S701000
Reexamination Certificate
active
07113166
ABSTRACT:
A haptic feedback device including a fluid viscosity-controlled brake that outputs high forces to the device user at low cost while maintaining inherent safety. An interface device includes a manipulandum physically contacted by the user. A sensor senses a position of the manipulandum and outputs a sensor signal. The interface device also includes a brake including a field-controlled fluid having a viscosity that can be controlled by controlling an electric current in a coil, where a resistive force or drag on the manipulandum is controlled by controlling the fluid's viscosity. The fluid can be an electrorheological fluid controlled by an electric field or a magnetorheological fluid controlled by a magnetic field. In one preferred embodiment, the resistive force is controlled by adjusting a degree of contact of the brake with the manipulandum based on the fluid's viscosity. Disclosed embodiments include fishing devices, bicycle simulators, and control knobs.
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Rosenberg Louis B.
Schena Bruce M.
Immersion Corporation
Ritchie David B.
Thelen Reid & Priest LLP
Wu Xiao
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