In this project, we propose the design and implementation of low-energy tokens for smart interaction with capacitive touch-enabled devices by associating the token's identity with its contact, or touch.
The proposed token's design features two key novel technical components: (1) a through-touch-sensor low-energy communication method for token identification and (2) a touch-sensor energy harvesting technique.
The communication mechanism involves the token transmitting its identity (ID) directly through the touch-sensor by artificially modifying the effective capacitance between the touch-sensor and token surfaces. This approach consumes significantly lower energy compared to traditional electrical signal modulation approaches.
By enabling the token to harvest energy from touch-screen sensors or touch-surfaces, the token is rendered battery-free.