Seiko Epson Corporation

Takashi Doi

Jun Hoshii

Ayako Kobayashi

Yoshihiko Matsuzawa

Michinao Osawa

In a printing chip overlapping area being an area in which a first printing chip and a second printing chip overlap with each other when viewed from a second direction, ink is discharged so that a first overlapping area and a second overlapping area at least partially do not overlap with each other when viewed from the second direction. In the first overlapping area, a nozzle usage ratio of a first nozzle row and a nozzle usage ratio of a third nozzle row are neither 0% nor 100%. In the second overlapping area, a nozzle usage ratio of a second nozzle row and a nozzle usage ratio of a fourth nozzle row are neither 0% nor 100%.

Printing apparatus and printing method

A printing apparatus includes a print chip that has a first nozzle group with a common input voltage; a print controller that controls to print a test image containing a first test region and a second test region which are printed upon input of a first voltage and a second voltage, respectively, the second voltage being different from the first voltage; an image capturing unit that image-captures a plurality of regions formed by dividing the test image; a density detector that detects densities of a first detection target region and a second detection target region in captured images; and a voltage calibrator that calibrates the input voltage based on the densities of the first detection target region and the second detection target region and values of the first voltage and the second voltage, wherein positions of the first detection target region and the second detection target region are identical.

Printing apparatus and method for calibrating input voltage in printing apparatus

Provided is a liquid droplet discharging method including: based on a first correction quantity table correlating to discharging of the first nozzle row, a second correction quantity table correlating to discharging of the second nozzle row, a relative usage ratio of the first nozzle row to the second nozzle row (=a usage rate of the first nozzle row/a usage rate of the second nozzle row), and a third correction quantity table correlating to discharging of a predetermined value Hk which is the relative usage ratio, correcting a liquid droplet quantity, per a unit area in print media, discharged from the first nozzle row and/or the second nozzle row.

Liquid droplet discharging method and liquid droplet discharging apparatus

A printing method includes forming on a medium a test pattern including a first patch, a second patch, and a plurality of patches interposed between the first patch and the second patch in such a way that the patches are aligned in a predetermined direction, scanning the test pattern with an optical sensor along the predetermined direction. Widths of the first and second patches in the predetermined direction and widths thereof in an intersectional direction intersecting the predetermined direction are greater than a spot size of the optical sensor. The width of each of the plurality of patches in the intersectional direction is greater than the spot size, and the width of each of the plurality of patches in the predetermined direction is smaller than the spot size.

Printing method, printing apparatus, and medium

An image output controller is capable of directly or indirectly controlling a printer printing a color chart and a color measuring apparatus carrying out color measurement for the color chart. When color authentication is executed for an optionally set image, a process is carried out in relation to user's setting or automatic optimization including at least one of a printing position of the color chart, a layout of the color chart and a color value of the color chart. The printer is controlled according to a printing condition based on the user's setting or the automatic optimization so that the color chart is printed on a sheet of predetermined printing paper. The color measuring apparatus is controlled so as to carry out color measurement for the printed color chart.

Growing community of inventors

Matsumoto, Japan

Takashi Doi