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. 2020 Jul 22;6(30):eabb5769. doi: 10.1126/sciadv.abb5769

Fig. 5. 3D touchless BCP structural color sensing display.

Fig. 5

(A) Schematic illustration of humidity-sensitive SC change in an LiTFSI-doped IHN BCP PC. (B) Schematic of two-terminal parallel-type 3D touchless sensing display with an LiTFSI-doped IHN BCP PC. Height 1 (h1) is higher than height 2 (h2). (C) Variation of relative humidity as a function of the finger-to-PC distance. (D) Photographs of LiTFSI-doped IHN BCP PCs in various relative humidity conditions from 40 to 90 RH%. (E) Photograph showing SC of an LiTFSI-doped IHN BCP PC when a finger is close to the surface. (F) Capacitance change of a 3D touchless sensing display with an LiTFSI-doped IHN BCP PC upon variation of finger-to-PC distance from 15, 9, 5, and 3 mm. (G) Variation in capacitance of the 3D touchless sensing display upon repetitive alteration of the finger-to-PC distance. Schematic (H) and photograph (I) of arrays for 3D touchless sensing displays. (J) 3D capacitance change map obtained from the arrays of 3D touchless sensing displays with a finger close to the surface of the arrays. Photo credit: H.S.K., Yonsei University.