The development of compact electroactive polymer actuators suitable for use in full page Braille displays

Lee J. Gorny, Brian C. Zellers, Minren Lin, Sheng Liu, Qiming Zhang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations

    Abstract

    Piezoceramic actuators, presently used in commercial Braille displays, are limited by the material's relatively small strain and brittle nature. For this reason, it is a challenge to develop full page, compact, graphic Braille displays that are affordable. A newly developed material composed of P(VDF-TrFE-CFE) terpolymer blended with 5% P(VDF-CTFE) electrostrictive actuators exhibits large strains (∼5% at 150V/μm), fast actuation (>5 mm/s), and has a relatively high elastic modulus (1.2 GPa). This material exhibits more than double the elastic energy density and a 50% higher modulus of the original electrostrictive terpolymer. Hence, the potential for viable actuators in compact, full page Braille displays is greater than ever, provided actuators can be manufactured reliably in quantity. This talk presents recent work in scaling production of such rolled actuators. Actuators extend.5 mm, are confined to the 2.5 mm grid spacing of conventional Braille text, generate >0.5 N force and operate at less than 200V, thus meeting the primary requirements for a commercialized Braille display. To manufacture these actuators, cast films are stretched using a roll-to-roll zone drawing machine that is capable of producing quantities of 2 μm thick film with high quality. What follows is a discussion of this machine, the roll-to-roll film stretching process and an assessment of the resulting stretched film for use as linear strain actuators, like those used in our Braille cell.

    Original languageEnglish (US)
    Title of host publicationElectroactive Polymer Actuators and Devices (EAPAD) 2010
    DOIs
    StatePublished - Jun 14 2010
    EventElectroactive Polymer Actuators and Devices (EAPAD) 2010 - San Diego, CA, United States
    Duration: Mar 8 2010Mar 11 2010

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume7642
    ISSN (Print)0277-786X

    Other

    OtherElectroactive Polymer Actuators and Devices (EAPAD) 2010
    CountryUnited States
    CitySan Diego, CA
    Period3/8/103/11/10

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • Cite this

    Gorny, L. J., Zellers, B. C., Lin, M., Liu, S., & Zhang, Q. (2010). The development of compact electroactive polymer actuators suitable for use in full page Braille displays. In Electroactive Polymer Actuators and Devices (EAPAD) 2010 [76420B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7642). https://doi.org/10.1117/12.847467