Seiko Epson Corporation

Shinshu University

Takuma Hayashi

Toshiaki Kakutani

Akito Sato

Yuma Fukuzawa

Naoki Sudo

Tomonaga Hasegawa

Hitoshi Takaai

Daisuke Matsumoto

Masahiro Fukazawa

Yasutoshi Takeuchi

Takayuki Shimosaka

Toshinori Murata

Kazuyuki Katagiri

Yasuko Takahashi

Tomoko Yanagidaira

Shunichiro Taniguchi

Yukihiro Kobayashi

Kenji Sano

Akiko Horiuchi

Ikuo Konishi

The print headincludes a nozzle region NAin which a distance between a nozzle arrayY and a nozzle arrayC is a distance Dand a nozzle region NAin which a distance between a nozzle arrayY and a nozzle arrayC is a distance D. When a ratio of sizes of a plurality of ink droplets ejected from nozzles of a nozzle region NAis defined as a first ratio and a ratio of sizes of a plurality of ink droplets ejected from nozzles of a nozzle region NAis defined as a second ratio, a control sectionexecutes a first print in which a ratio of ink droplets having a size other than a maximum size in the second ratio is smaller than a ratio of ink droplets having a size other than a maximum size in the first ratio.

Printing device and printing method

A recording device includes a vertical array type recording head, and when an image is recorded by performing main scanning a plurality of times, by forward scanning, sub scanning, and return scanning, with a range of first nozzles of a first nozzle group adjacent in a second direction to a second nozzle group corresponding to a first chromatic color having a lowest discharge ratio among a plurality of chromatic liquids as a first range, and a range of first nozzles of the first nozzle group adjacent in a second direction to a second nozzle group corresponding to a chromatic color other than the first chromatic color of the plurality of chromatic colors as a second range, performs first recording control in which a discharge ratio of an achromatic liquid by the first range is made higher than a discharge ratio of the achromatic liquid by any second range.

Recording device and recording method

It is possible to perform formation of a first pattern, a second pattern, a third pattern and a fourth pattern, a control unit is configured to execute first control and second control or first control and third control, the first control of forming a first patch in which the first and third patterns are disposed without performing conveyance operation, the second control of forming a second patch in which the first and second patterns are disposed and a third patch in which the third and fourth patterns are disposed and the third control of forming a fourth patch in which the first and fourth patterns are disposed and a fifth patch in which the second and third patterns are disposed.

Recording apparatus and recording method

A plurality of nozzle rows include a first nozzle row including first nozzles, a second nozzle row including second nozzles, and a third nozzle row including third nozzles. The third nozzle row is provided between the first nozzle row and the second nozzle row in a relative movement direction. When the first ink from the first nozzle is replaced at least by the second ink from the second nozzle and the third ink from the third nozzle, an edge portion of an output image to be formed is formed in such a manner that a first use rate is lower than a second use rate, the first use rate being a use rate of the second nozzle for the edge portion of the output image, the second use rate being a use rate of the second nozzle for a non-edge portion of the output image.

Recording control device and recording control method

A recording device includes a recording head and a control unit. When recording a raster line forming a partial image of a image, using, of a nozzle row, a plurality of OL nozzles in a positional relationship to record a common raster line, the control unit performs recording using the OL nozzles of a first range, in a range of the OL nozzles in a first direction, when a recording condition is a first recording condition, and performs recording using the OL nozzles of a second range narrower than the first range, of the range of the OL nozzles in the first direction, when the recording condition is a second recording condition in which a density difference, in the image, between the partial image and an image other than the partial image is greater than in the first recording condition.

A recording device includes a recording unit configured to execute recording on a recording medium using a color material of cyan, magenta, yellow, and black, and a control unit configured to control recording executed by the recording unit, wherein the control unit causes the recording unit to record an edge region of black data included in image data using at least the color material of black, causes the recording unit to record an inner region on an inner side of the edge region of the black data using at least the color material of cyan, magenta, and yellow, and sets the amount of the color material of black per unit area of the edge region to be greater than the amount of the color material of black per unit area of the inner region.

Recording device and method setting amount of black in edge region greater than amount of black in inner region

A recording control device includes: a test pattern recording control unit; a correction value calculating unit that calculates a correction value of the ink amount of each nozzle, based on a reading value of the ink recording area of the recorded test pattern; and a correction recording control unit, in which the maximum ink amount of the ink recording area corresponding to the reading value used by the correction value calculating unit to calculate the correction value is smaller when a medium type of a recording medium on which the test pattern is recorded is a second recording medium in which the ink is easier to bleed than a first recording medium than when the medium type of the recording medium on which the test pattern is recorded is the first recording medium.

Recording control device, recording apparatus, and recording control method

A recording head has two or more first nozzle rows from which an ink droplet of a first color is discharged, two or more second nozzle rows from which an ink droplet of a second color is discharged, and two or more third nozzle rows from which an ink droplet of a third color is discharged. In a plurality of nozzle rows from which an ink droplet is discharged on the same line along the relative movement direction, a distance between the first nozzle row and the second nozzle row in the relative movement direction is fixed, and a plurality of distances are present regarding a distance between the first nozzle row and the third nozzle row in the relative movement direction. Concerning an amount-of-ink upper limit that is an upper limit of an amount of ink that is dischargeable per unit area of the print substrate, first printing in which an amount-of-ink upper limit for a combination of the first nozzle row and the third nozzle row is smaller than an amount-of-ink upper limit for a combination of the first nozzle row and the second nozzle row is performed.

Printing apparatus and printing method

Provided is a method for manufacturing a liquid ejecting head which includes a plurality of chips, each of which includes a plurality of segments, each segment including a pressure generating chamber communicating with a nozzle opening through which liquid is discharged, a diaphragm which is a portion of the pressure generating chamber, and a pressure generating unit causing a pressure change in the pressure generating chamber through the diaphragm, the method including measuring natural frequencies of the plurality of segments included in each of the chips, classifying the chips into ranks using the maximum value of the natural frequencies of the chips as a reference, and manufacturing the liquid ejecting head which includes the chips selected based on the ranks.

Method for manufacturing liquid ejecting head and liquid ejecting head

A print apparatus that is configured to cause a print head provided with nozzles and a printing substrate to move relatively, eject an ink from the nozzles, and record dots onto the printing substrate includes a print control unit. The print control unit is configured to perform a control for ejecting the ink from the nozzles, and the print control unit modifies a proportion at which dots are formed adjacent to one another depending on an ejected amount of ink.

Print apparatus, print method, and serial printer

A printing control apparatus which discharges ink from nozzles, while moving a printing head that includes at least a first nozzle row in which a plurality of nozzles capable of discharging a same type of ink are arranged in a predetermined nozzle row direction and a second nozzle row in which a plurality of nozzles capable of discharging the same type of ink are arranged in the nozzle row direction, in a main scanning direction intersecting with the nozzle row direction, in which, when, out of a group of raster lines corresponds to odd-numbered positions in the nozzle row direction and a group of raster lines which corresponds to even-numbered positions in the nozzle row direction, one group of the raster lines is printed by discharging the ink from the nozzle row out of the first nozzle row and the second nozzle row, which precedes during the movement.

Printing control apparatus and printing control method

An image processing device includes a storing section configured to store a predetermined dither mask, a defective nozzle detecting section configured to detect a defective nozzle, and an interpolation processing section configured to specify a mask position corresponding to a position of the detected defective nozzle among mask positions included in the dither mask, and alter a threshold of a predetermined mask position so that a dot of the predetermined mask position included in the dither mask becomes ON when a dot of the specified mask position is ON.

Image processing device, dither mask generation method, and program

When dot data indicating whether or not a dot is to be formed is formed based on the gradation value for each pixel forming an image, dots belonging to a plurality of pixel groups are printed in a common region in an overlapping manner, and the distribution of dots formed in the common region has a noise characteristic possessing a peak in the spatial frequency region on the high-frequency side. In a case where first and second pixels belonging, respectively, to two pixel groups are proximal pixels in the common region in a predetermined gradation range in which probabilities k1 and k2 at which a dot is formed in the first and second pixels are such that k1&#x3c;0.5 and k2&#x3c;0.5, a probability K of a dot being formed in both of the proximal pixels is set to be close to k1&#xb7;k2.

A printing control apparatus includes a dither halftone component configured to convert printing data into a multi-value dot pattern. A reference pattern is a pattern that includes a first dot row in which two or more dots are arranged side by side in a main scanning direction and a second dot or second dot row that is arranged side by side in the main scanning direction, the second dot or second dot row having a number of dots not greater than a number of dots of the first dot row including a dot adjacent in an oblique direction with respect to the main scanning direction to a predetermined dot included in the first dot row. The dither halftone component carries out halftoning by using a mask pattern with which a probability that the reference pattern occurs in a dot pattern that is generated is substantially high.

When dot data indicating whether or not a dot is formed on the basis of the gradation value for each pixel, dots belonging to a plurality of pixel groups having different printing conditions are printed in a common region in an overlapping manner, and the distribution of dots in the common region has a noise characteristic possessing a peak in the spatial frequency region on the high-frequency side. In a case where first and second pixels belonging to two pixel groups are proximal pixels in the common region in a predetermined gradation range in which probabilities k1 and k2 at which a dot is formed in the first and second pixels are such that k1&#x3c;0.5 and k2&#x3c;0.5, a probability K of a dot in both of the proximal pixels is set to be close to k1&#xb7;k2.

Growing community of inventors

Nagano, Japan

Takuma Hayashi