a) Scalable Topology b) Hover (white) c) Touch (green) d) Touch, tap and grab e) Rotation Figure 1. a) I/O Braid with spiraling capacitive sensing lines forms repeating 3´3 sensing matrices. b) Braided fiber optics allows integrated lighting. c) Visuals serve as feedback with intensity and color. d) I/O Braid is suitable for eyes-free interactions, as it allows rich gesture input anywhere along the cord. e) Besides touch sensing, the topology provides a robust rotation mechanism.
ABSTRACTWe introduce I/O Braid, an interactive textile cord with embedded sensing and visual feedback. I/O Braid senses proximity, touch, and twist through a spiraling, repeating braiding topology of touch matrices. This sensing topology is uniquely scalable, requiring only a few sensing lines to cover the whole length of a cord. The same topology allows us to embed fiber optic strands to integrate co-located visual feedback.We provide an overview of the enabling braiding techniques, design considerations, and approaches to gesture detection. These allow us to derive a set of interaction techniques, which we demonstrate with different form factors and capabilities. Our applications illustrate how I/O Braid can invisibly augment everyday objects, such as touch-sensitive headphones and interactive drawstrings on garments, while enabling discoverability and feedback through embedded light sources.
ExpressivityWe are interested in extending the I/O Braid gesture set. For example, we plan to investigate support for several of the popular gestures from the elicitation study, such as slide, as they should be possible to recognize using the current architecture. We are also interested in reflectometry [37] to sense the position of a touch on the cord. Combining I/O Braid with near field radio or bioimpedance [23, 24] may