A microfabricated electrostatic haptic display for persons with visual impairments.
Identifieur interne : 004739 ( Ncbi/Curation ); précédent : 004738; suivant : 004740A microfabricated electrostatic haptic display for persons with visual impairments.
Auteurs : H. Tang [États-Unis] ; D J BeebeSource :
- IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society [ 1063-6528 ] ; 1998.
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Abstract
An electrostatic haptic display with three 7 x 7 electrode arrays of three different sizes was fabricated on a 4-in wafer using lithographic microfabrication techniques. The display utilizes electrostatic stimulation to generate a tactile sensation of texture on a scanning finger. The tactile sensation appeared to be a result of increased friction and vibration due to the electrostatic forces between the finger skin and the electrodes. Various spatial tactile patterns (lines, circles, squares, and triangles, etc.) can be presented on the display. Experiments of threshold, line separation, and pattern recognition were performed on subjects with visual impairments to study the spatial resolution and information transmission on arrays of variant electrode size and spacing. Two columns with two-column spacing can be resolved with 80% accuracy on the small array, for a spatial resolution of 5.8 mm in terms of edge-to-edge electrode distance. The overall percentages of correct recognition for the patterns were 68.3, 72.1, and 71.3% on the small, medium, and large arrays, respectively. While subject is an important factor for both threshold and pattern recognition, electrode size was statistically significant for threshold only. Frequency and duty cycle of the stimulation waveform did not show statistical significance.
PubMed: 9749901
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pubmed:9749901Le document en format XML
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<author><name sortKey="Tang, H" sort="Tang, H" uniqKey="Tang H" first="H" last="Tang">H. Tang</name>
<affiliation wicri:level="2"><nlm:affiliation>Beckman Institute for Advanced Science and Technology, Urbana, IL 61801, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
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<placeName><region type="state">Illinois</region>
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<author><name sortKey="Beebe, D J" sort="Beebe, D J" uniqKey="Beebe D" first="D J" last="Beebe">D J Beebe</name>
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<author><name sortKey="Tang, H" sort="Tang, H" uniqKey="Tang H" first="H" last="Tang">H. Tang</name>
<affiliation wicri:level="2"><nlm:affiliation>Beckman Institute for Advanced Science and Technology, Urbana, IL 61801, USA.</nlm:affiliation>
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<series><title level="j">IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term>
<term>Blindness</term>
<term>Computer Graphics</term>
<term>Electric Stimulation</term>
<term>Female</term>
<term>Humans</term>
<term>Male</term>
<term>Pattern Recognition, Automated</term>
<term>Sensory Aids</term>
<term>Touch</term>
<term>User-Computer Interface</term>
<term>Vision Disorders</term>
<term>Visually Impaired Persons (rehabilitation)</term>
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<keywords scheme="MESH" qualifier="rehabilitation" xml:lang="en"><term>Visually Impaired Persons</term>
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<term>Blindness</term>
<term>Computer Graphics</term>
<term>Electric Stimulation</term>
<term>Female</term>
<term>Humans</term>
<term>Male</term>
<term>Pattern Recognition, Automated</term>
<term>Sensory Aids</term>
<term>Touch</term>
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<front><div type="abstract" xml:lang="en">An electrostatic haptic display with three 7 x 7 electrode arrays of three different sizes was fabricated on a 4-in wafer using lithographic microfabrication techniques. The display utilizes electrostatic stimulation to generate a tactile sensation of texture on a scanning finger. The tactile sensation appeared to be a result of increased friction and vibration due to the electrostatic forces between the finger skin and the electrodes. Various spatial tactile patterns (lines, circles, squares, and triangles, etc.) can be presented on the display. Experiments of threshold, line separation, and pattern recognition were performed on subjects with visual impairments to study the spatial resolution and information transmission on arrays of variant electrode size and spacing. Two columns with two-column spacing can be resolved with 80% accuracy on the small array, for a spatial resolution of 5.8 mm in terms of edge-to-edge electrode distance. The overall percentages of correct recognition for the patterns were 68.3, 72.1, and 71.3% on the small, medium, and large arrays, respectively. While subject is an important factor for both threshold and pattern recognition, electrode size was statistically significant for threshold only. Frequency and duty cycle of the stimulation waveform did not show statistical significance.</div>
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