TableHop: An actuated fabric display using transparent electrodes

TableHop:An actuated fabric displayusing transparent electrodesDeepak Sahoo, Kasper Hornbk, Sriram SubramanianUniversity of Sussex, University of Copenhagen, University of Sussex,United Kingdom. Denmark. United Kingdom.

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Rich interaction, unique applicationsSelf-actuated (Occlusion)Output device2

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inFORMUIST 13

Actuated DisplaysRich interaction, unique applicationsSelf-actuated (Occlusion)Output device3

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GHOSTERC

Output device4

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ObakeUIST 13

Rich interaction, unique applicationsUser-deformed (not actuated)Input device5

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Troiano et al.AVI 14

Elastic display Rich interaction, unique applicationsUser-deformed (not actuated)Input device6

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Elastic display Rich interaction, unique applicationsUser-deformed (not actuated)Input device7

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TableHopActuatedDisplaysElasticDisplays

Output device8

TableHop 9

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Shape of deformation12

Electrode under side of fabricUniform forceFlatter shape12

Shape of deformation13

Electrode upper side of fabricNon-uniform forceSmoother shapeAnalytical solution340% stretching13

Highly stretchable fabric100% pure spandex fabricMore than 500% stretchable before tearingMore than 300% stretchable with full recovery

Transparent electrodesIndium Tin Oxide coated PET> 80% transparent75 mm bending radius of curvature

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No electric shock

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Calibration: Deformation15

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Calibration: Deformation

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HysteresisBetter HV supply

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Calibration: Speed17

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Calibration: Speed (280 ms 3.6 Hz)

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Better HV supply18

Calibration: Vibration (12 Hz)19

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Calibration: Vibration (1 kV, 1.8 mm)

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Mechanical + electronic responseBetter HV supply20

Applications

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Fabric restores to actuated position after user intervention..25

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DiscussionMild tactile feedback 0.1N force, 12 HzDeformation + vibration signalVisual + tactile cues

Electrostatic actuationLower power consumption (W/mm2)Low mass (100s gm), size (10s cm)Cheap, low noise and scalable

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soft fabric and non-rigid actuation27

Electrode addressingPassive matrix addressingRow and column selection

H-bridge connectionCharging (HV) and discharging (GND)Unselect (HV/2)

Active matrix addressingCustom electrode design

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High-impedance modeSegment addressing28

SummaryAn actuated fabric-displayOffer improved interactionShape-changing display + vibro-tactile feedbackSimple implementation Design guidelinesScalable (portable + low-energy)Novel application and user-experience

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Deepak Sahoo1, Kasper Hornbk2, Sriram Subramanian11University of Sussex, UK. 2University of Copenhagen, Denmark.

TableHop:An actuated fabric displayusing transparent electrodes30

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