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:
Jul. 28, 2015
Filed:
Sep. 17, 2009
Chunhong Zhou, Oceanside, CA (US);
Avraham I. Caspi, La Jolla, CA (US);
Kelly H. Mcclure, Simi Valley, CA (US);
Matthew J. Mcmahon, Washington, DC (US);
Arup Roy, Valencia, CA (US);
Robert J. Greenberg, Los Angeles, CA (US);
Chunhong Zhou, Oceanside, CA (US);
Avraham I. Caspi, La Jolla, CA (US);
Kelly H. McClure, Simi Valley, CA (US);
Matthew J. McMahon, Washington, DC (US);
Arup Roy, Valencia, CA (US);
Robert J. Greenberg, Los Angeles, CA (US);
Second Sight Medical Products, Inc., Sylmar, CA (US);
Abstract
Techniques and functional electrical stimulation to eliminate discomfort during electrical stimulation of the retina are provided. According to a first technique, discomfort is eliminated through control of timing group assignment. According to a second technique, discomfort is eliminated through an edge detection method. According to a third technique, brightness clipping is used to eliminate discomfort. According to a fourth technique, direct reduction of current is obtained by scaling it down by a factor which is dependent on the sum of current in all electrodes. According to a fifth technique, the current being fed to each electrode is adjusted, by dividing it by a weighted sum of currents fed to the surrounding electrodes. According to a sixth technique, a method based on the current summation effect is used. According to a seventh technique, a large return electrode is used. According to an eighth technique, the return electrode is used for a pseudo-multi-polar stimulation.