Abstract: The present invention provides an image scanning device having an upper housing and a lower housing. The upper hosing includes at least a scanning module for outputting digitalized image signals. Thus, a user can place a document facing up on a document plate and therefore be able to examine the wrinkles, alignment and inclination.

Abstract: An image scanner performing multiple scanning operations for a single scan line is disclosed. The additional scanning operations are performed between two adjacent pixels. For a double scanning mode, the CCD performs one scanning operation for a scan line at a first position. Then, the CCD is moved from the first position to a second position along the X-direction to perform the other scanning operation at the second position. The distance between the first and the second positions is a half of the distance between two adjacent pixels. The scanning data of the two scanning operations are alternatively arranged and converted into final image data. By this way, a low-pixel-density CCD can be used to obtain a high-pixel-density scanning quality.

Abstract: A device for adjusting the position of platform of a scanner and calibrating the depth of field of an opto-mechanic module of the scanner. The device includes an exposed driving element for moving a supporting element of the platform. A first embodiment includes a nut incorporated with an exposed flange for turning, and a stud fixed on a lower base. A second embodiment includes a driving slant element movably mounted on the lower case and activated by a screw exposed outwards; and a driven portion formed on an upper case that support the platform. The devices are simple in structure and easy to be used.

Abstract: A device for adjusting the position of platform of a scanner and calibrating the depth of field of an opto-mechanic module of the scanner. The device includes an exposed driving element for moving a supporting element of the platform. A first embodiment includes a nut incorporated with an exposed flange for turning, and a stud fixed on a lower base. A second embodiment includes a driving slant element movably mounted on the lower case and activated by a screw exposed outwards; and a driven portion formed on an upper case that support the platform. The devices are simple in structure and easy to be used.

Abstract: An image scanner performing multiple scanning operations for a single scan line is disclosed. The additional scanning operations are performed between two adjacent pixels. For a double scanning mode, the CCD performs one scanning operation for a scan line at a first position. Then, the CCD is moved from the first position to a second position along the X-direction to perform the other scanning operation at the second position. The distance between the first and the second positions is a half of the distance between two adjacent pixels. The scanning data of the two scanning operations are alternatively arranged and converted into final image data. By this way, a low-pixel-density CCD can be used to obtain a high-pixel-density scanning quality.