Fig. 5.

Tactile sensing devices of gesture recognitions for VR applications. (A to C) Schematic illustration of the triboelectric yarn sensor array (A), working principle (B), and the wearable sign-to-speech translation system (C). Reproduced with permission from [101]. Copyright 2020, Springer Nature. (D to F) Photograph of the gesture recognition wristband sensor (D), working principle (E), and gesture data processing (F). Reproduced with permission from [102]. Copyright 2022, John Wiley and Sons. (G to K) Schematic depicting the possible flow of body information with the epicentral sensor (G), illustration of measuring the epicentral motions of fingers (H) with the insert scanning electron microscopy (SEM) image of the cracked sensor (scale bar, 40 μm), photograph of the sensor conformably on skin (I), depiction of skin deformations for different finger bending motions (J), and photograph of the system for gesture duplication (K). Reproduced with permission from [104]. Copyright 2020, Springer Nature.