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Self-powered, ultra-sensitive, flexible tactile sensors based on contact electrification

United States Patent

9,921,678
March 20, 2018
View the Complete Patent at the US Patent & Trademark Office
A tactile sensor for sensing touch from a human finger includes a triboelectric layer and includes a material that becomes electrically charged after being in contact with the finger. The first side of a first conductive layer is in contact with the second side of triboelectric layer. The first side of a dielectric layer is in contact with the first conductive layer and the second side of the dielectric layer is in contact with a second conductive layer. When the triboelectric layer becomes electrically charged after being in contact with the finger, the first conductive layer and the second conductive layer are subjected to an electric field, which has a first field strength at the first conductive layer and a second field strength, different from the first field strength, at the second conductive layer. A plurality of tactile sensors can be arranged as a keyboard.
Wang; Zhong Lin (Atlanta, GA), Zhu; Guang (Atlanta, GA)
Georgia Tech Research Corporation (Atlanta, GA)
14/ 818,908
20160070392
August 5, 2015
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support under agreement No. DE-FG02-07ER46394, awarded by the Department of Energy. The government has certain rights in the invention.