Extended Data Fig. 7: Characterization of the textile keyboard.
From: Large-area display textiles integrated with functional systems
a, Weave diagram of the textile keyboard (yellow: Ag-plated fibre, black: carbon fibre, blue: cotton yarn, grey: cotton yarn). b, Photograph and electrical connection of a 4 × 4 textile keyboard. The red squares indicate the positions of keys. Scale bar, 5 mm. c, Equivalent circuit of a 4 × 4 keyboard. This keyboard worked by reading the voltage between the metallic and carbon fibres (sample voltage, Vs) at an applied voltage (Vcc) of 5 V. d, Pressing responses of a key with resistance variations that were greater than four orders of magnitude. e, Working mechanism of the textile keyboard. f, Voltages (Vs) recorded by pressing individual keys one by one. The correspondence between the key position and its characteristic Vs are indicated by the coordinates in b and f.
