Printing device and print image processing device
AssigneeSeiko Epson Corporation
InventorHitoshi Yamakado
Life of this patent
Estimating the term…
Abstract
A printing device includes 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 gradient of the each pixel with, from among thresholds in a matrix for each of respective pixels, 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 corrects a predetermined threshold of the matrix depending on ink output characteristics of each nozzle of the print head.
Claims7
A printing device comprising:
- 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 gradient of the each pixel with, from among thresholds in a matrix for each of respective pixels, 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 corrects a predetermined threshold of the matrix depending on ink output characteristics of each nozzle of the print head.
A print image processing device, comprising:
- an ink dot setting controller that determines an ink dot setting for each pixel of image data by comparing a gradient of the each pixel, from among thresholds in a matrix for each respective pixel, with a threshold corresponding to each pixel;
- and
- a threshold matrix correction unit that corrects a threshold of the matrix depending on ink output characteristics of each nozzle of a nozzle head of a printer device, the correction including, in a case that a space between ink dots formed by adjacent nozzles is larger than a predetermined value, correcting the threshold so that a probability of an ink dot being formed for pixels corresponding to the adjacent nozzles is increased, or a size of an ink dot to be formed for the pixels is increased.
A print image processing device, comprising:
- an ink dot setting controller that determines an ink dot setting for each pixel of image data by comparing a gradient of the each pixel with, from among thresholds in a matrix for each respective pixel, a threshold corresponding to the each pixel;
- and
- a threshold matrix correction unit that corrects a threshold of the matrix depending on ink output characteristics of each nozzle of a nozzle head of a printer device, the correction including, in a case that a space between ink dots formed by adjacent nozzles is smaller than a predetermined value, correcting the threshold so that a probability of an ink dot being formed for pixels corresponding to the adjacent nozzles is increased, or a size of an ink dot to be formed for the pixels is increased.
Dependencies are inferred from the claim text.