Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1996-11-13
1999-09-28
Mullen, Thomas
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, 345163, 341 20, 463 30, G09G 508
Patent
active
059596139
ABSTRACT:
A method and apparatus for shaping force signals for a force feedback device. A source wave is provided and is defined by a set of control parameters (including a steady state magnitude, a frequency value and a duration value) and modified by a set of impulse parameters (including an impulse magnitude, and a settle time representing a time required for the impulse magnitude to change to the steady-state magnitude). Optionally, application parameters specifying a direction of force signal and trigger parameters specifying activating buttons can also be provided for the source wave. Using a host processor or a local processor, the force signal is formed from the source wave and the sets of control parameters and impulse parameters, where the force signal includes an impulse signal followed by a continual steady-state signal after an expiration of the settle time. A feel sensation is generated to a user of the force feedback device as physical forces produced by actuators on the force feedback device in response to the force signal. The steady-state magnitude value is lower than a magnitude value of a non-impulse-shaped force signal required to create a corresponding feel sensation having a similar apparent sensation to the user.
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Rosenberg, Louis B.,The Use of Virtual Fi
Braun Adam C.
Rosenberg Louis B.
Immersion Corporation
Mannava Ashok
Mullen Thomas
Riegel James R.
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