Patent ID: 6147780
Filing Date: 2000-11-14
Classification: H04N

Abstract:
A scanning device comprising:a housing having a transparent platform installed on its top for placing a document;a scanning module installed inside the housing slidable along a front-and-rear direction for scanning the document, the scanning module comprising:a carrier;a sensor installed inside the carrier slidable along a left-right direction, the sensor comprising a plurality of sensing units linearly arranged along a left-right direction for taking image samples of the document; anda positioning device for fixing the sensor inside the carrier comprising:a switchable device installed on the carrier having a positioning side;a positioning chip installed on the sensor; andan elastic device installed between the carrier and the sensor for pulling the positioning chip of the sensor toward the positioning side of the switchable device; anda driving device for driving the scanning module forward and backward to scan the document;wherein when the scanning module scans the document along the front-and-rear direction, the positioning side of the switchable device fixes the positioning chip of the positioning device at non-repeating sampling positions inside the carrier to increase the resolution of the sensor.