GelTouch: Localized Tactile Feedback Through Thin, Programmable Gel
summary
A 2 mm transparent layer of poly(N-isopropylacrylamide) gel sits over a touchscreen and locally stiffens above 32 °C, activated by ITO heating, engraved ITO outlines, or resistive wire. A working 7 in prototype uses a 6x4 tactile array to create buttons, sliders and a thumbstick, the gel becoming 25 times stiffer when heated and users detecting edges about 95% of the time; activation takes ~2 s and relaxation 3–4 s.
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chapters (10)
- 0:00Introduction and award
- 0:45What is GelTouch
- 2:30How GelTouch works
- 4:57Hydrogel details
- 7:02Activation techniques
- 8:48Hydrogel feel demonstration
- 9:34Evaluation results
- 10:41Prototype applications
- 11:46Future improvements
- 13:12Summary and Q&A
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