User input method and apparatus for handheld computers

Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard

Reexamination Certificate

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Details

C345S156000, C345S215000

Reexamination Certificate

active

07071924

ABSTRACT:
A system and method for providing input to a handheld computing device by provisioning the handheld computing device with a projecting device a projecting device for displaying a graphical representation of a keyboard, the graphical representation including key locations capable of being selected by an object, the graphical image displayed in an area proximate the device; a signal detection system for detecting the presence of an object located at a selected key location within the area; and, a mechanism for determining the selected key in response to detecting an object at a corresponding selected key location and registering the selected key as a keystroke in the computing device.

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“The Acceleration Sensing Glove,” http://bsac.eecs.berkeley.edu/˜shollar/fingeracc.html, pp. 1-3, last updated Oct. 29, 2001.

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