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Browse Prior Art Database

Three-Dimensional Joystick Via Cavity

IP.com Disclosure Number: IPCOM000099794D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

McLean, JG: AUTHOR [+3]

Abstract

This article describes a device for three-dimensional input to a personal computer system using a joystick in the middle of which a hole is placed into which one sticks a finger. The depth of penetration is measured by light-emitting diode (LED) sensor pairs or other means.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Three-Dimensional Joystick Via Cavity

       This article describes a device for three-dimensional
input to a personal computer system using a joystick in the middle of
which a hole is placed into which one sticks a finger. The depth of
penetration is measured by light-emitting diode (LED) sensor pairs or
other means.

      The drawing shows a three dimensional control joystick. The
front half of the device has been removed for visualization.  This
device allows the user to input three distinct analog signals to the
using device.  A base 1 supports the device and provides the cabling
to the using unit.  A spherical knob 2 rotates within the base and
supplies the standard X and Y analog position data for the joystick.
This can be achieved with any of the standard methods used in
joysticks.  A finger cavity 3 is used to control the Z analog signal.
 The user places his finger in the cavity against a finger button 4.
When the user presses on finger button 4, spring 5 is compressed.

      The compression of the spring 5 provides the Z analog signal.
The disk 6 presses a rubber ball 7 against surface acoustic wave
(SAW) device 8.  The SAW device sends out an analog signal whose
magnitude is dependant upon the amount of area the rubber ball
covers.  This is controlled by the amount of pressure from the user's
finger.  The deformation of the ball should provide a uniform,
accurate measure of pressure and changes in pressure.  The SAW
technique allows accura...