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Proceedings Paper

A compact electroactive polymer actuator suitable for refreshable braille display
Author(s): Kailiang Ren; Sheng Liu; Minren Lin; Yong Wang; Q. M. Zhang
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Paper Abstract

The large strain, high elastic modulus, and easy processing of P(VDF-TrFE-CFE) electrostrictive terpolymer make it very attractive to replace low strain piezoceramics and piezopolymers in many applications with much improved performance. In this paper, a compact polymer actuator is developed utilizing the electrostrictive terpolymer, which is suitable for full page Braille Display and graphic display. Key issues related to the reliability of electroactive polymers used in the compact actuators and for the mass fabrication of these polymer actuators are investigated. Making use of a recently developed conductive polymer, a screen printing deposition method was developed which enables direct deposition very thin conductive polymer electrode layer (< 0.1 &mgr;m) with strongly bonding to the terpolymer surface and short fabrication time. It was observed that the thin conductive polymer electrodes lead to the self-healing of the polymer after electric breakdown. An EAP compact Braille actuator was designed and fabricated with these terpolymer films wound on a spring core. The test results demonstrate that the EAP Braille actuator meets all the functional requirements of actuators for refreshable full Braille display, which offers compact size, reduced cost and weight.

Paper Details

Date Published: 5 April 2007
PDF: 9 pages
Proc. SPIE 6524, Electroactive Polymer Actuators and Devices (EAPAD) 2007, 65241G (5 April 2007); doi: 10.1117/12.715058
Show Author Affiliations
Kailiang Ren, The Pennsylvania State Univ. (United States)
Sheng Liu, The Pennsylvania State Univ. (United States)
Minren Lin, The Pennsylvania State Univ. (United States)
Yong Wang, The Pennsylvania State Univ. (United States)
Q. M. Zhang, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 6524:
Electroactive Polymer Actuators and Devices (EAPAD) 2007
Yoseph Bar-Cohen, Editor(s)

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