Seiko Epson Corporation

Toru Miyamoto

Hirokazu Nunokawa

Bunji Ishimoto

Masahiko Yoshida

Tatsuya Nakano

Yoichi Kakehashi

Hitoshi Yamakado

Toru Takahashi

Yu Gu

Kazuyoshi Tanase

Hirokazu Kasahara

Gu Yu

Hiroshi Wada

Takamitsu Kondo

Kimitaka Kamijo

Tomohiro Yuda

Tsuyoshi Sano

Osamu Shinkawa

Shinichi Arazaki

Naoki Kayahara

Yusuke Mizutaki

Atsushi Nagahara

Tomohito Nakano

Hideaki Kasahara

Mitsuhisa Ando

Naoki Maruyama

A discharge position adjusting method includes: moving a first nozzle row and a second nozzle row in scanning directions, each of the first and second nozzle rows having a plurality of nozzles that eject liquid droplets, the first and second nozzle rows being disposed at different locations in a predetermined direction, the scanning directions intersecting the predetermined direction; forming a first image by ejecting liquid droplets from the first nozzle row, and forming a second image by ejecting liquid droplets from the second nozzle row; and adjusting positions at which liquid droplets are to be placed by using the first and second images. The first and second images are created during the moving of the first and second nozzle rows.

Discharge position adjusting method and droplet ejecting apparatus

A liquid droplet ejecting method which includes forming an image which is configured by a raster which is completed using liquid droplet ejecting operations of n times by alternately repeating a transport operation, and a liquid droplet ejecting operation in which liquid droplets are ejected on the medium while moving a first head which includes a plurality of nozzles, and a second head which aligns on the upstream side of the first head, in a scanning direction which intersects the transport direction in a scanning manner, in which, in a liquid droplet ejecting operation after a liquid droplet ejecting operation in which a first nozzle column and a second nozzle column are used in one liquid droplet ejecting operation, the number of times m (blank time) in which a liquid droplet ejecting operation of not using the second nozzle column is continuously executed is less than 0.5n.

Liquid droplet ejecting method and liquid droplet ejecting apparatus

An ink set includes a first black ink which includes water, less than 0.3 mass % of carbon black, and a resin, in which a solid content in the ink is 20 times or more a content of the carbon black; a second black ink which includes water, 0.3 mass % or more and less than 0.6 mass % of carbon black, and a resin, in which a solid content in the ink is 10 times or more a content of the carbon black; a third black ink which includes water, 0.6 mass % or more and less than 1.5 mass % of carbon black, and a resin, in which a solid content in the ink is twice or more a content of the carbon black; and a fourth black ink which includes water, 1.5 mass % to 10 mass % of carbon black, and a resin.

Ink set and recording method

A liquid ejecting apparatus includes a plurality of nozzles; a moving portion which moves the plurality of nozzles to the medium; and a control portion which controls the plurality of nozzles and the moving portion. The plurality of nozzles include a first-type nozzle group which records dots using a nozzle use rate which is less than a first threshold value; a second-type nozzle group which records dots using a nozzle use rate which is the first threshold value or more, and less than a second threshold value; and a third-type nozzle group which records dots using a nozzle use rate of the second threshold value or more. The control portion executes multipass recording in which recording of dots is completed using main scanning passes of N times, ejects the liquid in order of ejecting of the first-type nozzle group and the third-type nozzle group with respect to a first region, ejects the liquid using the second-type nozzle group with respect to a second region which is close to the first region, and ejects the liquid in order of ejecting of the third-type nozzle group and the first-type nozzle group with respect to a third region which is close to the second region, but is not close to the first region.

Liquid ejecting apparatus and liquid ejecting method

A droplet discharging method includes: forming a plurality of dots on a first region of a medium, on a second region which is positioned in a &#x2212;Y direction from the first region, and on a third region which is positioned in the &#x2212;Y direction from the second region. The dots are formed on the first region by using a first head and a second head to cause a second head use ratio to be constant, the dots are formed on the second region by using the first head and the second head so as to cause the second head use ratio to be increased from a value less than a first set value to a value greater than a second set value greater than the first set value in the &#x2212;Y direction, and the dots are formed on the third region by using the second head.

Droplet discharging method and droplet discharging apparatus

A droplet discharging method includes: forming a plurality of dots on a first region of a medium, on a second region which is positioned in a &#x2212;Y direction from the first region, and on a third region which is positioned in the &#x2212;Y direction from the second region. The dots are formed on the first region by using a first head, the dots are formed on the second region by using the first head and a second head so that a second head use ratio is increased from a value less than a first set value to a value greater than a second set value greater than the first set value in the &#x2212;Y direction, and the dots are formed on the third region by using the first head and the second head to cause the second head use ratio to be constant.

To minimize any decrease in image quality, even in an instance in which there is a displacement in a landing position of a fluid in a region in which nozzle rows overlap, (A) a fluid-ejecting device including: a first nozzle column; (B) a second nozzle column, the second nozzle column being arranged so as to form an overlapping region; and (C) a control part for causing the fluid to be ejected so that in each of a plurality of raster lines arranged in a row in the predetermined direction in the overlapping region, dots to be formed are apportioned between the first nozzles and the second nozzles; the control part causing the fluid to be ejected so that there are produced.

Fluid-ejecting device and fluid-ejecting method for ejecting a fluid by a first nozzle column and a second nozzle column that form an overlapping region

A head unit is provided that includes a plurality of head groups having a first head and a second head in a direction which crosses a transport direction of a medium. Color difference is obtained which indicates difference in color between patches formed for each band using dots having the same dot diameter from among a plurality of patches based on the result of color measurement performed on a test pattern which includes the plurality of patches for each band, the plurality of patches being formed for each head group using dots having different dot diameters. The amount of first ink and the amount of second ink, which are respectively ejected from the first head and the second head which are included in all the head groups, are adjusted such that the dot diameter becomes the dot diameter which is determined based on the color difference.

Printing apparatus and printing method

A dither mask is used in a halftone process that is performed by the printer that includes the preceding and following heads. The dither mask includes preceding and following head storage regions. The preceding head storage region is used for a printing portion of the preceding head. The following head storage region is used for a printing portion of the following head. The dither mask is generated by determining, using comprehensive evaluation values, storage elements in which thresholds are to be stored under the condition that dots are permitted to be formed by the preceding and following heads at the same position in the region corresponding the overlapping regions.

Method for manufacturing printing device

A loss of print quality is suppressed even when the recording medium is skewed by the paper feed roller. A distance D, which is the length of separation between a black nozzle line BT of an upstream head unit and a yellow nozzle line YT of a downstream head unit, is a distance corresponding to the distance offset the conveyance distance of the recording medium when the paper feed roller turns a half revolution from the conveyance distance of the recording medium when the paper feed roller turns an integer number of revolutions.

Fluid ejection device and method of manufacturing a fluid ejection device

For each of a plurality of reference colors located at prescribed coordinates in a first color space (e.g., the RGB color space), there are associated, on an individual pixel row basis, correction vectors indicating correction amounts in the first color space. For each pixel datum of image data of first tone values (e.g., 256 tone values) of the first color space prior to a color conversion process, a correction process is carried out on the basis of the correction vector that has been associated with the pixel row to which a given pixel belongs, the correction vector also being associated with the reference color of a location surrounding the coordinates that indicate the pixel data in the first color space. The color conversion process and the halftoning process are carried out on image data composed of the pixel data that has been subjected to the correction process.

Line printing device and method performing color conversion and halftoning on image data subjected to correction based on correction vectors associated with a pixel row and reference color

A liquid ejection device includes first and second heads. A first color conversion table is for converting a tone value of a first color space of a pixel, for which the liquid is ejected from the first head, to a tone value of a second color space corresponding with a color of the liquid, and a second color conversion table is for converting a tone value of the first color space of a pixel, for which the liquid is ejected from the second head, to a tone value of the second color space. For a pixel of an overlapping portion for which the liquid is ejected from the first and second heads, a tone value of the first color space is converted to a tone value of the second color space according to a third color conversion table created based on the first and second color conversion tables.

Liquid ejection device and liquid ejection method

A recording apparatus of this invention includes a head; a transport mechanism that transports a medium in a transport direction with respect to the head, according to a target transport amount to be targeted; a memory that stores a plurality of correction values associated with a relative position of the head and the medium; and a controller that controls the transport mechanism based on the target transport amount that has been corrected, after correcting the target transport amount based on correction values, which are in number according to a size of the target transport amount, and which include the correction value according to the relative position when transporting by the target transport amount.

Recording apparatus and transport method

A liquid ejection method includes determining, according to image data, an ejection pixel that is a pixel at which a liquid is to be ejected and a non-ejection pixel that is a pixel at which a liquid is not to be ejected; determining, according to the image data, a nozzle requiring flushing; and ejecting liquid from the nozzle requiring flushing to the non-ejection pixel adjacent to the ejection pixel, the non-ejection pixel being among pixels associated with the nozzle requiring flushing.

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Shiojiri, Japan

Toru Miyamoto