Patent ID: 6388775
Filing Date: 2002-05-14
Classification: H04N

Abstract:
An image scanner comprising:a lower casing having a lower transparent platform on its top for placing a document to be scanned wherein the lower transparent platform can be divided into two separate parts, namely a first part and a second part; a scanning module moveably installed inside the lower casing for scanning the document; an upper casing rotationally connected to the lower casing and having an upper transparent window on its bottom wherein when the upper transparent window of the upper casing is physically attached to the lower transparent window of the lower casing, the upper transparent window is positioned above the first part of the lower transparent platform; a light source moveably installed inside the upper casing and placed above the upper transparent window for providing back light to the document; an automatic document feeder installed inside the upper casing for carrying documents to be scanned through the second part of the lower transparent platform wherein the automatic document feeder comprises a lid rotationally installed on the upper casing and a sensing device for detecting the position of the lid; and a control circuit for controlling operations of the image scanner; wherein when the control circuit senses that the lid is at an â€œonâ€  position through the-sensing device, the scanning module will be moved to a position under the second part of the lower transparent platform such that the documents carried through the second part of the lower transparent platform by the automatic document feeder can be scanned, and when the control circuit senses that the lid is at an â€œoffâ€  position, the light source and the scanning module will be moved under the control of the control circuit to scan a document placed on the first part of the lower transparent platform.