MightyTrace

Abstract

In this paper, we present a new technology to perform multi Tangible User Interface (TUI) tracking on standard LCdisplays. A lot of existing technologies for tangible user interface tracking use back-or front-projection setups, but they suffer from poor image quality, shadow casting, nonergonomic interaction, and/or large installations. Thus, we introduce a principle that allows using the InfrActables' technology [3] on a large LC-display. It combines simultaneous multiuser input on a display with the advantages of a large flat screen. We use infrared photodiodes (IR-LEDs) mounted behind the display's LCmatrix to track infrared diodes in front of the screen. After initial tests concerning the infrared transparency and sensor characteristics, we developed a proof of concept consisting of 384 sensors, which are addressed through a modular master-slave circuit. Using several interaction devices, multiuser interaction is possible.

From Table–System to Tabletop: Integrating Technology into Interactive Surfaces

“…In 2008, MightyTrace was introduced by Hofer et al [17]. This system focuses on integrating all technical components into the tabletop.…”

Flatir

“…All objects (not only finger touch) on the screen reflect a certain amount of this light, which can then be detected. MightyTrace [8] also uses a sensor array behind the LC-display, but tracks only active devices and does not support touch. HD Touch [9] is another work, which uses LC-displays for displaying the image.…”

“…In the future, it is planned to combine the presented setup with a TUI tracking or additional touch detection system to improve accuracy. It might be even possible to combine our approach with a TUI technology like ThinSight [7], [8] or MightyTrace [9].…”