Encoding of size and brightness of percepts in a visual prosthesis

US8527056B2 · kind B2 · utility

Assignee

• Second Sight Medical Products, Inc. · US

Inventors

• Devyani Nanduri · Los Angeles, US
• Mark Humayun · Glendale, US
• James D. Weiland · Valencia, US
• Jessy Dorn · Los Angeles, US
• Robert J. Greenberg · Los Angeles, US
• Ione Fine · Seattle, US

Key dates

• Filing date: Apr 29, 2011
• Grant date: Sep 3, 2013
• Expiry date: Aug 31, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/0543
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Methods of electrically stimulating percepts in a patient with a visual prosthesis are discussed. Changes in amplitude of stimulation increase both the perceived brightness and the perceived size of the precept. Changes in frequency of stimulation change the perceived brightness without altering the perceived size of the percept. Hence, a source image may be mapped to a combination of amplitude and frequency that best induces the desired image.