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:
Dec. 07, 2010
Filed:
Nov. 08, 2006
Mark Nussbächer, Teck, DE;
Mark Nussbächer, Teck, DE;
Digital Imaging Systems GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
An improved on chip test method for determining the photon transfer curve (PTC) and dark current in an image sensor is described. Cost and time savings is achieved by reducing the number of frames necessary for the measurements to three including two exposure frames and one frame for dark current testing. A conventional test involving 'n' different exposure times each with two frames is replaced by implementing a snap shot mode where a first plurality of pixel rows are exposed for a time t, a second plurality of pixel rows are exposed for a time t, and so forth up to an nth plurality of pixel rows exposed for a time twhere the total number of pixel rows equals a frame and t>t>t. The resulting image has 'n' regions each with a different brightness that become progressively brighter from top to bottom of the image.