Patent ID: 7828403
Filing Date: 2010-11-09
Classification: B41J

Abstract:
1. A method for printing an image using a printer including a paper path having a transition position as paper is advanced in a page advance direction, and including a printhead having a plurality of dot forming elements, the method comprising the steps of: a. providing a print mask for printing in a first print mode with a first number of the plurality of dot forming elements, the print mask including mask data arranged in mask sections corresponding to sets of complimentary dot forming elements; b. printing a portion of the image with the first number of the plurality of dot forming elements in the first print mode using the print mask; c. switching to a subsampled print mask for a second print mode as the paper is advanced past the transition position near a trailing edge of the paper, the switching step including: i) decreasing the mask size by deactivating every Nth set of mask data from each mask section corresponding to complementary dot forming elements; and ii) shifting mask data in a same direction as the page advance direction; and d. printing a portion of the image near the trailing edge of the paper with the subsampled print mask corresponding to a second number of the plurality of dot forming elements, such that the second number is less than the first number.