Optical touch panel

Details Optical touch panel Optical touch panel

2007-11-18

2009-08-11

Eisen, Alexander (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S173000

Reexamination Certificate

active

07573465

ABSTRACT:
An optical touch panel including a support, an optical light guide illumination assembly arranged along and above at least most of a periphery of the support to define a detection region, the assembly including at least one optical light guide and a light source arranged for directing light along the at least one optical light guide, at least one light detector, arranged to detect changes in the light received from the optical light guide illumination assembly produced by the presence of an object in the detection region and detection circuitry receiving at least one output from the at least one light detector and providing an output indication of the two dimensional location of the object present in the detection region.

REFERENCES:
patent: 7099553 (2006-08-01), Graham et al.
patent: 7163326 (2007-01-01), Cassarly et al.
patent: 7333094 (2008-02-01), Lieberman et al.
patent: 2004/0061689 (2004-04-01), Ito
patent: 2005/0248540 (2005-11-01), Newton

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