Method of measuring the movement of an input device

Details Method of measuring the movement of an input device Method of measuring the movement of an input device

2003-06-04

2008-03-04

Nguyen, Tu T (Department: 2886)

Optics: measuring and testing

By light interference

Having partially reflecting plates in series

Reexamination Certificate

active

07339683

ABSTRACT:
A method of and an input device for measuring scroll or click movement of an object and the input device relative to each other, includes determining the presence of the object on a window of the input device. Lower frequencies of an output signal from single sensor unit are separated and used for determining both the scroll and click motions. This allows measuring scroll movement and click movement with one sensor unit of the input device and reduction of costs and size of the input device.

REFERENCES:
patent: 6707027 (2004-03-01), Liess et al.
patent: 2002/0093663 (2002-07-01), Tsai
patent: 2003/0016365 (2003-01-01), Liess et al.
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patent: WO0237124 (2002-05-01), None
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patent: WO03037410 (2003-05-01), None
patent: WO03102717 (2003-12-01), None
M. Liess et. al. A miniturized multidirectional optical motion sensor and input device based on laser self-mixing; Dec. 2002; pp. 2001-2006; vol. 13 No. 12.

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