Field focusing and mapping in an electrode array
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United States of America Patent
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Issued Date -
Nov 23, 2006
app pub date -
Jul 25, 2006
filing date -
Jan 31, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention is a system for mapping a high resolution image to a lower resolution electrode array and, by applying varying stimulus to neighboring electrodes, creating a perceived image greater in resolution than the electrode array. The invention is applicable to a wide range of neural stimulation devices including artificial vision and artificial hearing. By applying a sub-threshold stimulus to two neighboring electrodes where the sum of the stimuli is above the threshold of perception, a perception is created in neural tissue between the two electrodes. By adjusting the stimulus on neighboring electrodes, the location of stimulation can be altered. Further, noise can be applied to the stimulating electrode or its neighboring electrodes to reduce the threshold of stimulation.
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