SYSTEM AND A METHOD FOR TRACKING INPUT DEVICES ON LC-DISPLAYS

摘要

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, non-ergonomic interaction, and/or large installations. The known drawbacks are eliminated with infrared photodiodes (14) mounted behind a display's LC-matrix (21) to track infrared diodes (3) in front of the LC-matrix (21). The sensors (14) are addressed through a modular master-slave circuit (27, 28). Using several interaction devices (1), multiuser interaction is possible.