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Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

F. Echtler, T. Pototschnig, G. Klinker
An LED-based Multitouch Sensor for LCD Screens
TEI 2010, January 25 - 27, Cambridge, MA, USA, pp. 227-230. (bib)

In recent years, a large number of multitouch sensor concepts have been presented. Particularly optical sensors are highly popular due to their versatility. However, especially camera-based systems often require a significant amount of space behind the screen and are not well suited to flatscreen-based setups. While integrated sensors for flatscreens have already been presented, they are mostly complex, expensive or both. To address these problems, a novel type of multitouch sensor is presented which extends a common LCD monitor with multitouch capabilities without significant depth requirements. The sensor consists of a homogeneous matrix of cheap, mass-produced infrared LEDs. The LCD surface remains unmodified, resulting in a pleasant haptic experience for the user.
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