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:
Apr. 15, 2003
Filed:
Sep. 08, 1999
Michael Chen, Hsin-Chu, TW;
Avison Inc., Hsinchu, TW;
Abstract
The invention relates to an optical scanner for saving power. The optical scanner comprises a scanning module for scanning a document to generate corresponding image signals, a cold cathode ray tube for supplying lights to the document when scanning the document, a power source for supplying electric power to the cold cathode ray tube, and a control circuit for controlling operations of the scanner. When the scanning module is in an idle state, the control circuit controls the active period of each of the power source's duty cycles to reduce the electric power supplied to the cold cathode ray tube so that the cold cathode ray tube can be maintained in a warm state and the startup time for warming the cold cathode ray tube to scan the document is reduced.