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:
Jan. 29, 2013
Filed:
Apr. 05, 2007
Mark Nussbächer, Kirchheim Teck, DE;
Giuseppe D'onofrio, Boise, ID (US);
Mark Nussbächer, Kirchheim Teck, DE;
Giuseppe D'onofrio, Boise, ID (US);
Digital Imaging Systems GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
An improved method for photon transfer curve (PTC) testing in an image sensor is described. A cost and time savings is achieved by reducing the number of frames necessary for measurements to two that are generated by illuminating a first plurality of pixel rows at a first intensity level m, a second plurality of pixel rows at a second intensity level t, and so forth up to an nth plurality of pixel rows illuminated at an nth intensity level mwhere m>m>m. The resulting image has 'n' regions each with a different brightness. The highest intensity level essentially saturates the pixels in the nth region. In one example, a four row exposure and five intensity levels are employed in the illuminator sequence. An intelligent light source is pre-programmable with illumination intensity settings and is synchronized to the image sensor using HSYNC and VSYNC signals, for example.