The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2012
Filed:
Jul. 08, 2011
Samip Shah, Lake Forest, CA (US);
Amy Chu Peishuan Hines, Monterey Park, CA (US);
Dao Min Zhou, Saugus, CA (US);
Robert J. Greenberg, Los Angeles, CA (US);
Mark S. Humayun, Glendale, CA (US);
James D. Weiland, Valencia, CA (US);
Samip Shah, Lake Forest, CA (US);
Amy Chu Peishuan Hines, Monterey Park, CA (US);
Dao Min Zhou, Saugus, CA (US);
Robert J. Greenberg, Los Angeles, CA (US);
Mark S. Humayun, Glendale, CA (US);
James D. Weiland, Valencia, CA (US);
Second Sight Medical Products, Inc., Sylmar, CA (US);
Abstract
A critical element of a retinal prosthesis is the stimulating electrode array, which is placed in close proximity to the retina. It is via this interface that a retinal prosthesis electrically stimulates nerve cells to produce the perception of light. The impedance load seen by the current driver consists of the tissue resistance and the complex electrode impedance. The results show that the tissue resistance of the retina is significantly greater than that of the vitreous humor in the eye. Circuit models of the electrode-retina interface are used to parameterize the different contributors to the overall impedance.