Variable pitch electrode array
First Claim
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1. An implantable electrode array comprising:
- an array body;
a plurality of electrodes spaced across said array body at varying intervals, wherein said intervals are smaller toward a central portion of said array body and increase toward an outer edge of said array body; and
said electrodes are of varying size.
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Abstract
The present invention is an implantable electrode array having electrodes with variable pitch and variable size. Electrode arrays of the prior art provide electrodes with a common spacing and size. However, this is not how the human body is arranged. As an example, the retina has closely spaced retinal receptors near the fovea. Those receptors are spaced farther apart, farther away from the fovea. Further, the amount of electrical current required to stimulate the perception of light increases with distance from the fovea. Hence, larger electrodes are required to transfer the necessary current farther away from the fovea.
54 Citations
20 Claims
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1. An implantable electrode array comprising:
- an array body;
a plurality of electrodes spaced across said array body at varying intervals, wherein said intervals are smaller toward a central portion of said array body and increase toward an outer edge of said array body; and
said electrodes are of varying size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- an array body;
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13. An implantable retinal electrode array comprising:
- an array body;
a plurality of electrodes spaced across said array body at varying intervals. - View Dependent Claims (14, 15, 16)
- an array body;
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17. An implantable cortical electrode array comprising:
- an array body;
a plurality of spike electrodes spaced across said array body at varying intervals. - View Dependent Claims (18, 19, 20)
- an array body;
Specification