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:
Sep. 05, 2006
Filed:
Apr. 25, 2000
Kurt Spears, Fort Collins, CO (US);
Edward S Beeman, Windsor, CO (US);
James C Albritton-mcdonald, Bellvue, CO (US);
Kurt Spears, Fort Collins, CO (US);
Edward S Beeman, Windsor, CO (US);
James C Albritton-McDonald, Bellvue, CO (US);
Hewlett-Packard Development Company, LP., Houston, TX (US);
Abstract
In an image scanner, multiple exposures are used for each scan line, and only part of the pixels for each scan line are used for each exposure. For example, with two exposures, half the pixels may be used for the first exposure, and half for the second exposure. For each exposure, half of the charges are shifted out rapidly and discarded, without waiting for the A/D conversion time. As a result, for each exposure, the time required to empty the charge shift register is greatly reduced, reducing the thermal noise for all pixels.