US Patent 9162441 Inkjet printer and method

An inkjet printer includes an inkjet head including nozzles arranged in a first direction, a head scanning mechanism moving the inkjet head along a second direction perpendicular to the first direction, a feeding mechanism feeding the recording medium along the first direction, and a storage device storing upstream correction information and downstream correction information. A controller performs a first determination process for determining a correction value for a specific scanning operation by using the upstream correction information when an image is printed on an upstream area adjacent to a specific area corresponding to the specific scanning operation and when no image is printed on a downstream area adjacent to the specific area, and a second determination process for determining the correction value by using the downstream correction information when no image is printed on the upstream area and when an image be printed on the downstream area.