Patent ID: 7770993

Claim:
A printing device, comprising: a memory that stores a matrix including thresholds for each of respective pixels, the threshold corresponding to each pixel of image data, the memory being further configured to store a correction value; a print head having a plurality of nozzles capable of ejecting ink on a print medium and of forming one or more types of ink dots on the print medium; an ink dot setting unit that determines an ink dot setting for each pixel of image data by comparing a gradation of the each pixel with, from among the thresholds in the matrix stored in the memory, a threshold corresponding to the each pixel of image data; a print head controller that controls ejection of ink from each nozzle of the print head on the basis of an ink dot setting determined by the ink dot setting controller; and a threshold matrix correction unit that executes adding or subtracting the correction value to or from the threshold of the matrix stored in the memory, in response to ink output characteristics of each nozzle of the print head, the adding or subtracting the correction value being executed for pixels that are determined to have splash bending, wherein the threshold matrix correction unit, in a case that an amount of space between ink dots formed by adjacent nozzles is larger than the predetermined value, is configured to subtract the correction value from a threshold in the matrix such that a probability of an ink dot being formed for the subject pixel is increased, or a size of an ink dot formed for the subject pixel is increased, and after adding or subtracting the correction value, the threshold matrix before adding or subtracting the correction value is deleted from the memory.