Browse Prior Art Database

Proximity Detection in an IBM Untethered Personal Stylus

IP.com Disclosure Number: IPCOM000111722D
Original Publication Date: 1994-Mar-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Schubert, KD: AUTHOR

Abstract

In multimedia applications that use WorkPad*-like devices, such as described in [1], the ability to detect when an untethered personal stylus is taken out of proximity to a WorkPad-like device is necessary. This is needed as both a usability feature and to prevent accidental loss of the stylus. The encryption is a method to warn the user that the Untethered Personal Stylus (UTS) has moved out of proximity from the WorkPad-like device.

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This is the abbreviated version, containing approximately 100% of the total text.

Proximity Detection in an IBM Untethered Personal Stylus

      In multimedia applications that use WorkPad*-like devices, such
as described in [1], the ability to detect when an untethered
personal stylus is taken out of proximity to a WorkPad-like device is
necessary.  This is needed as both a usability feature and to prevent
accidental loss of the stylus.  The encryption is a method to warn
the user that the Untethered Personal Stylus (UTS) has moved out of
proximity from the WorkPad-like device.

      Included within the UTS is the capability of detecting when it
has moved a specific distance away from the WorkPad-like device, as
described in [2].

      The present invention is implemented by providing the UTS with
an audible warning device which beeps when the UTS is approaching a
predetermined proximity distance from the WorkPad-like device.

      Another embodiment is to equip the WorkPad-like device with the
audible warning device.  In this manner, the user will be warned when
the stylus is too far away from the workpad to register its relative
location.

*  Trademark of IBM Corp.

References

[1]  U.S.  Patent 5,117,071.

[2]  U.S.  Patent 4,686,332.