TEI 10 | Program / An LED-based Multitouch Sensor For LCD Screens

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An LED-based multitouch sensor for LCD screens

Florian Echtler (Technische Universit�t M�nchen)
Thomas Pototschnig (Technische Universit�t M�nchen)
Gudrun Klinker (Technische Universit�t M�nchen)

Abstract

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.

Document

http://tei-conf.org/10/uploads/Program/p227.pdf

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Demo Video (link to target) (edit comment) - echtler @ January 27, 2010, at 02:58 PM

Here's a video of the system in action.

Software (link to target) (edit comment) - echtler @ February 01, 2010, at 08:22 AM

BTW: all of this is already integrated into libTISCH (http://tisch.sf.net/) - give it a try!

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