Browse Prior Art Database

PS/2: Gyroscopic Mouse Device

IP.com Disclosure Number: IPCOM000107972D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 2 page(s) / 115K

Publishing Venue

IBM

Related People

Johnson, WJ: AUTHOR [+4]

Abstract

Many implementations for detecting workstation mouse movement can be found on the market. All have their various drawbacks. A mouse device using a ball and roller apparatus picks up particles of what it rolls over and as a consequence must be frequently cleaned. A light- pad mouse device functions correctly only when located on the light- pad. The light-pad must be kept clean by the user. The various implementations on the market today can be improved upon in reliability and accuracy. This invention improves the overall quality of the workstation mouse.

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This is the abbreviated version, containing approximately 52% of the total text.

PS/2: Gyroscopic Mouse Device

       Many implementations for detecting workstation mouse
movement can be found on the market.  All have their various
drawbacks.  A mouse device using a ball and roller apparatus picks up
particles of what it rolls over and as a consequence must be
frequently cleaned.  A light- pad mouse device functions correctly
only when located on the light- pad.  The light-pad must be kept
clean by the user.  The various implementations on the market today
can be improved upon in reliability and accuracy. This invention
improves the overall quality of the workstation mouse.

      An IBM PS/2* workstation comes with a mouse.  The mouse is an
integral part of software use today.  Everything from the latest in
operating system and application interfaces make the mouse and its
associated display pointer one of the preferred methods of user
interaction.

      This invention describes a new method of determining
directional movement for a mouse.  This new method incorporates a
gyroscope into a workstation mouse device. The gyroscope and its
associated inertia detectional circuits provide movement detection
for the device.

      A gyroscope is defined as consisting of a spinning mass.  The
spin axis turns between two low-friction supports and maintains
angular orientation with respect to inertial coordinates when not
subjected to external torque.  External torque is generated by any
movement of the gyroscope with respect to its present spatial
coordinates.  The greater the force of movement, the greater the
amount of opposing torque generated by the gyroscope in an attempt to
resist the movement.  Gyroscopes are currently used in many
technological fields today.  A gyrocompass incorporates a gyroscope
and is used as a navigational device providing a stable directional
reference for aircraft and spacecraft. Large gyroscopes are used as
gyrostabilizers to reduce the side-to-side rolling of a ship at sea.

      When a user moves the mouse device, the movement relates to the
gyroscope as external force in the form of torque.  The torque's
amount of force, direction and duration are picked up by the
gyroscope's associated detectional circuits within the mouse.  The
detectional circuits translate the applied directional force into
mouse movement signals for the duration of the movement.  These
signals are sent on to the workstation mouse port just as a mouse
incorporating a ball and roller or reflected light does currently.

      The gyroscope's detectional circuits perform a conversion of
two analog signals into a single signal.  The force of the mouse's
movement creates a quantity of torque which is one of the analog
signals.  The velocity...