Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1994-07-14
1997-04-22
Powell, Mark R.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
345161, 345184, G05B 1500
Patent
active
056235828
ABSTRACT:
An apparatus for interfacing the movement of a shaft with a computer includes a support, a gimbal mechanism having two degrees of freedom, and three electromechanical transducers. When a shaft is engaged with the gimbal mechanism, it can move with three degrees of freedom in a spherical coordinate space, where each degree of freedom is sensed by one of the three transducers. A fourth transducer can be used to sense rotation of the shaft around an axis. The method includes the steps of defining an origin in 3-dimensional space, physically constraining a shaft in the 3-dimensional space such that a portion of the shaft always intersects the origin and such that a portion of the shaft extending beyond the origin defines a radius in a spherical coordinate system, transducing a first electrical signal related to a first angular coordinate of the radius with a first transducer, transducing a second electrical signal related to a second angular coordinate with a second transducer, transducing a third electrical signal related to the length of the radius with a third transducer, and coupling the transducers to a computer.
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Immersion Human Interface Corporation
Loui Martin
Powell Mark R.
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