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:
Jun. 01, 2010
Filed:
Dec. 03, 2007
Patrick Lichtsteiner, Lucerne, CH;
Tobi Delbruck, Zürich, CH;
Patrick Lichtsteiner, Lucerne, CH;
Tobi Delbruck, Zürich, CH;
Universitaet Zuerich, Zuerich, CH;
Abstract
A photoarray includes a one-dimensional or two-dimensional array of cells, each having a photosensor generating a sensor signal dependent on a light intensity at the cell, a first capacitor charged by a time-derivative of a current, at least one threshold detector detecting if a voltage over the first capacitor exceeds a threshold value and generating an output signal if it does, and a discharge device for discharging the first capacitor after occurrence of the output signal. Such a cell generates an event only when the incoming light intensity changes, which reduces the amount of data to be processed from the photoarray.