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LumiWatch: On-Arm Projected Graphics and Touch Input  

Robert Xiao, Teng Cao, Ning Guo, Jun Zhuo, Yang Zhang and Chris Harrison (CHI 2018)

Compact, worn computers with projected, on-skin touch interfaces have been a long-standing yet elusive goal, largely written off as science fiction. Such devices offer the potential to mitigate the significant human input/output bottleneck inherent in worn devices with small screens. In this work, we present the first, fully-functional and self-contained projection smartwatch implementation, containing the requisite compute, power, projection and touch-sensing capabilities. Our watch offers roughly 40 cm2 of interactive surface area -- more than five times that of a typical smartwatch display. We demonstrate continuous 2D finger tracking with interactive, rectified graphics, transforming the arm into a touchscreen. We discuss our hardware and software implementation, as well as evaluation results regarding touch accuracy and projection visibility.

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Reference

Robert Xiao, Teng Cao, Ning Guo, Jun Zhuo, Yang Zhang and Chris Harrison. 2018. LumiWatch: On-Arm Projected Graphics and Touch Input. In Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems (CHI '18). ACM, New York, NY, USA. DOI: https://doi.org/10.1145/3173574.3173669

For more resources, please refer to Robert Xiao's site.