Pixel cell circuit and implant

US10530971B2 · kind B2 · utility

Assignees

• PIXIUM VISION, UNIVERSITE PIERRE ET MARIE CURIE · FR
• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR
• Institut National de la Sante et de la Recherche Medicale (INSERM) · FR

Inventors

• Daniel Matolin · Freital, DE
• Christoph Posch · Bad Fischau, AT
• Benjamin R. Benosman · Pantin, FR

Key dates

• Filing date: Apr 6, 2016
• Grant date: Jan 7, 2020
• Expiry date: Dec 18, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N25/707
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A pixel cell circuit comprises an electrode, one or more main photosensitive elements electrically coupled to the electrode for outputting a stimulation signal to the electrode responsive to light illumination, and a shunt arrangement comprising a shunt switch electrically coupled in parallel across the one or more photosensitive elements, and a control arrangement operatively coupled to the shunt switch and configured for placing the shunt switch in an open state responsive to incident light received at the pixel cell and placing the shunt switch in a closed state if no incident light is received at the pixel cell.