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:
Mar. 06, 2001
Filed:
Sep. 16, 1998
Harry T. Garland, Los Altos Hills, CA (US);
Gerald A. May, Saratoga, CA (US);
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The x-ray exposure of an image pixel array (,) is measured by assigning to certain pixels (,) of the array the task of measuring the level of exposure. A target set (,) of pixels from array (,) is selected and divided into a set of exposure pixels (,) and a set of image pixels (,). Both sets of pixels generate and collect electrical charges in proportion to the amount of x-ray exposure experienced by them. The charges collected by the exposure pixels (,) are continuously read out during the capture of an image and compared with a desired exposure level. Once the desired exposure level is reached, as indicated by the exposure pixels (,), the image pixels (,) are read out and an image is produced.