Patent ID: 7271821

Claim:
A printer comprising: a photoconductive drum; a laser unit operable to generate a laser beam; a reflective element positioned to reflect the laser beam onto the photoconductive drum; a controller in communication with the laser unit and the reflective element, the controller configured to scan the laser beam along a plurality of scan lines to form dots on the photoconductive drum, wherein each scan line partially overlaps an adjacent scan line and each dot comprises a plurality of segments, and wherein the controller is configured to generate each of the plurality of segments by directing the laser beam to remove a portion of a desired amount of charge on each scan line; and wherein the controller is configured to operate such that, if the photoconductive drum moves at an expected rate, overlapping scan lines remove the desired amount of charge from each segment and if the photoconductive drum moves at an unexpectedly fast rate such that an amount of overlap of the adjacent scan lines is reduced, a portion of the desired amount of charge is removed from segments formed by non-overlapped scan lines.