Lift detection adapted for navigation on a transparent...

Details Lift detection adapted for navigation on a transparent... Lift detection adapted for navigation on a transparent...

2006-08-25

2008-10-28

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S559380

Reexamination Certificate

active

07442916

ABSTRACT:
A pointing device such as an optical mouse is equipped with a top surface lift detection system that is able to provide lift detection whether the pointing device sits on a transparent structure or on an opaque structure. The top surface lift detection system relies on the separate detection of a light beam that reflects off the surface upon which the pointing device sits to detect lift whether the pointing devices sits on an opaque surface or a transparent surface.

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patent: 2007/0013661 (2007-01-01), Theytaz et al.
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