An LED-based multitouch sensor for LCD screens

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 flatscreenbased 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, massproduced infrared LEDs. The LCD surface remains unmodified, resulting in a pleasant haptic experience for the user. Author Keywords multitouch, sensor hardware, optical sensor, led sensing ACM Classification Keywords H.5.2 Information Interfaces and Presentation: Miscellaneous General Terms Experimentation, Human Factors

• Type: Conference
• Year: 2010
• Where: TEI
• Authors: Florian Echtler, Thomas Pototschnig, Gudrun Klinker
• Keywords: Hardware, Multitouch Sensor, Multitouch Sensor Concepts, Sensor, TEI 2010