Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent
1981-10-16
1983-04-12
Grieb, William H.
Education and demonstration
Communication aids for the handicapped
Tactile reading aid
340407, G09B 2100
Patent
active
043796974
ABSTRACT:
A tactile stimulator is disclosed which comprises a stack of planar sheets of a piezoelectric polymer material, which in the preferred embodiment is PVF.sub.2. Each sheet has two opposed broad flat faces and at least one tactile surface at one longitudinal end. Separate electrodes cover portions of each flat face of the sheets in predetermined patterns. The electrodes from sheet to sheet are mirror images of the corresponding electrode patterns of the next adjacent sheet. Each of the sheets is polarized in the direction of its tactile end such that upon application of a voltage across the electrodes of that sheet, the sheet will longitudinally extend its tactile surface.
REFERENCES:
patent: 3229387 (1966-01-01), Linvill
patent: 3866020 (1975-02-01), Charlesworth
patent: 4283178 (1981-08-01), Tetzlaff
N.S.F. Grant Progress Report entitled "Integrated Electro-Mechanical Transducer Systems" Oct. 1980.
Draft of Article entitled "Cyclindrical PVF.sub.2 Electro-Mechanical Transducers" by Dameron and Linvill, submitted to N.S.F. in a letter dated Oct. 1, 1980.
Final Report to the Small Business Innovation Search Program entitled "Investigation of PVF.sub.2 as a Tactile Stimulator for the Opticon", dated Mar. 31, 1980.
Technical Report No. 4834-3 of the Integrated Circuits Laboratory, Stanford Electronics Laboratories, Stanford University, entitled "PVF.sub.2 Models, Measurements, Device Ideas", by Linvill, Mar. 1978.
Reprint of article from Acoustical Imaging, vol. 8, pp. 387-394, entitled "A Polyvinylidene Fluoride Bow-Tie Imaging Element" by Dameron and Linvill, published 1980.
Grieb William H.
Shaw, Jr. Philip M.
Stanford University
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