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학술지 A Light-Driven Vibrotactile Actuator with a Polymer Bimorph Film for Localized Haptic Rendering
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저자
황인욱, 김형준, 문성철, 윤성률, 강태준
발행일
202102
출처
ACS Applied Materials & Interfaces, v.13 no.5, pp.6597-6605
ISSN
1944-8244
출판사
American Chemical Society (ACS)
DOI
https://dx.doi.org/10.1021/acsami.0c19003
협약과제
20ZS1200, 인간중심의 자율지능시스템 원천기술연구, 김도현
초록
A vibrotactile actuator driven by light energy is developed to produce dynamic stimulations for haptic rendering on a thin-film structure. The actuator is constructed by adopting a thermal bimorph membrane structure of poly(3,4-ethylenedioxythiophene) doped with p-toluenesulfonate (PEDOT-Tos) coated onto a polyethylene terephthalate (PET) film. Upon irradiation of near-infrared (NIR) light, the light energy absorbed at the PEDOT-Tos layer is converted into thermoelastic bending deformation due to the mismatch in coefficient of thermal expansion between PEDOT-Tos and PET. Since the light-induced deformation is reversible, spatially localized, and rapidly controllable with designed light signals, the proposed actuator can produce vibrotactile stimulation over 10 dB at arbitrary areas in the human-sensitive frequency range from 125 to 300 Hz using a low input power of μ2.6 mW mm-2, as compared with a complex electrical circuit and high input power needed to achieve such actuation performance. Together with its simple structure based on light-driven actuation, the advent of this actuator could open up new ways to achieve substantial advances in rendering textures at a flexible touch interface.
키워드
actuator, PEDOT, photothermal, thermoelastic, vibrotactile
KSP 제안 키워드
4-Ethylenedioxythiophene(EDOT), Bending deformation, Coefficient of thermal expansion, Energy absorbed, Frequency Range, Haptic rendering, Light energy, Light-driven, Light-induced, Low input power, Membrane structures