Browse Prior Art Database

Mouse with Sensitivity Control

IP.com Disclosure Number: IPCOM000117156D
Original Publication Date: 1996-Jan-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Knox, AR: AUTHOR

Abstract

Disclosed is a means of altering the motional sensitivity of a pointing device independently of the attached system unit.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 60% of the total text.

Mouse with Sensitivity Control

      Disclosed is a means of altering the motional sensitivity of a
pointing device independently of the attached system unit.

      The invention described adds a secondary switching function to
the pointing device.  This is applicable primarily to mice and
tablets, although with modification, it could also be applied to the
Trackpoint and Trackball devices.

      Taking the mouse (most common pointing device) as an example,
X-Y movements are converted to rotational motion by the use of a
massive ball in contact with the desktop or mat causing contacting
rollers inside the mouse to rotate.  These rollers are configured to
provide an independent X and Y output.  The roller rotation is
converted to electrical pulses by a shaft encoder or similar device.
The pulses are then transmitted to the system unit over the mouse
interface and result in the pointer on the screen moving.

      Presently, the sensitivity of the mouse movement to screen
pointer movement ratio is selected by the user in software.  However,
this is a most inconvenient method for "on the fly" resolution
changes.

      The Figure shows a block diagram of the invention.  In
operation, an extra division ratio is added between the pulse source
(shaft encoder for instance) and the mouse's interface and control
logic.  Both the shaft encoder outputs and the divided version of it
are connected to selection logic.  In practice this would be a simple
pair...