Patent ID: RE42033

Claim:
A single step multi-section exposure scanning method for a scanner having a photo-sensor and a stepper motor, wherein the photo-sensor uses N rows of sensors sensor cells to process each one of a plurality of primary colors and the stepper motor drives the photo-sensor at least one of the photo-sensor and a scan document an exposure distance L for one step of the stepper motor, the scanning method comprising the steps of : moving an at least one of the photo-sensor and the scan document the exposure distance along a L, the movement to change a position of the photo-sensor relative to the scan document; exposing a row of not yet exposed sensor cells after moving each 1/Nth of the exposure distance L; sending out an analogue voltage obtained from a previous row of sensors sensor cells when the next row of sensors sensor cells is exposed; and repeating the above steps the above process until the entire document is scanned, whereby for one step of the stepper motor moving the exposure distance L , N sequential times of exposure with respect to the N rows for the primary color are performed.