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:
Oct. 26, 2004
Filed:
Nov. 30, 1999
Michael Chen, Hsin-Chu, TW;
Avision Inc., Hsin-Chu Hsien, TW;
Abstract
The present invention provides an optical scanner that adjusts the image-induced voltage by controlling the exposure time of the sensors. The optical scanner comprises a scanning module comprising a plurality of color detectors for detecting light of different colors when scanning a document to generate corresponding electric charge, a cathode-ray tube for providing light to the document, a power supply for supplying power to the cathode-ray tube, and a control circuit for controlling operations of the optical scanner and the power supply. The control circuit controls an exposure time of each of the color detectors according to the sensitivity of the color detector to its corresponding color of light so that the amount of electric charge generated by each of the color detectors during each exposure is controlled and properly scaled.