Canon Kabushiki Kaisha

Gc Corporation

Fumiko Suzuki

Norihiro Kawatoko

Hirokazu Tanaka

Tsukasa Doi

Atsuhiko Masuyama

Kiichiro Takahashi

Hitoshi Nishikori

Mayuko Yamagata

Osamu Iwasaki

Satoshi Seki

Satoshi Masuda

Gou Sasaki

Tomoki Yamamuro

Yutaka Kano

Yoshiyuki Honda

Mitsuhiro Ono

Nobuhiro Kitabatake

Akitoshi Yamada

Junichi Nakagawa

Ryosuke Iguchi

Masashi Hayashi

Tomoyuki Tenkawa

Tatsunosuke Miyano

An object of the present invention is to efficiently perform a reading operation for printing position adjustment with high accuracy. A printing apparatus prints, on a print medium, adjustment patterns for adjusting a printing position on the print medium and corresponding respectively to printing position adjustment items. In this printing, the printing apparatus prints the adjustment patterns while conveying the print medium in a forward direction with a conveying unit. Then, the conveying unit conveys the print medium in a backward direction until the adjustment patterns are moved beyond a reading position of a reading unit in the backward direction. Thereafter, the conveying unit conveys the print medium in the forward direction again to cause the adjustment patterns to reach the reading position. Thereafter, the reading unit reads the adjustment patterns continuously at the reading position while the conveying unit conveys the print medium in the forward direction.

Printing apparatus and printing method

Recording data for recording an achromatic color image having a high lightness is generated as follows. A first color material and a second color material which has a hue complementary to that of the first color material are used to record the image. Recording data is generated such that a recording amount of the first color material and a recording amount of the second color material are larger than a recording amount of another color material, and such that a pixel where it is determined that the first color material is to be recorded and a pixel where it is determined that the second color material is to be recorded are at positions different from each other.

Image processing apparatus and method to generate recording data

An image printing apparatus can print an image in which graininess is suppressed while using a color material of light blue. To achieve this, the color material of light blue satisfies the following condition.&#x394;&#x2265;(&#x394;)&#x3e;0 and&#x394;&#x2265;(&#x394;)&#x3e;0Here, &#x394;Lrepresents a difference in lightness between cyan ink and a blank area, &#x394;Lrepresents a difference in lightness between magenta ink and the blank area, and &#x394;Lrepresents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition.+()/2&#x2264;&#x2212;()/2Here, hrepresents a hue of the cyan ink, hrepresents a hue of the magenta ink, hrepresents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hrepresents a hue of the light blue ink.

Image printing apparatus and image printing method

A light blue ink discharge opening array unit is located between cyan ink discharge opening array units, between the magenta ink discharge opening array units, and not between the black ink discharge opening array unit.

Recording head and inkjet recording apparatus

A discharge port array unit including discharge ports having a small discharge port diameter is not arranged in a position adjacent to a discharge port array unit generating a strong airflow, and a discharge port array unit including discharge port array having not a small discharge port diameter is arranged in the position adjacent to the discharge port array unit generating a strong airflow.

Driving orders of driving blocks are controlled with regard to each of multiple types of ink so that landing positions of ink from the driving blocks differ in multiple scans, and in the mask patterns used, there is a relatively small number of superimposed pixels among pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to one type of ink and one scan and pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to another type of ink and the one scan.

Recording apparatus and recording method

An image printing apparatus can print an image in which graininess is suppressed while using a color material of light blue. To achieve this, the color material of light blue satisfies the following condition.&#x394;&#x2267;(&#x394;)&#x3e;0 and&#x394;&#x2267;(&#x394;)&#x3e;0Here, &#x394;Lrepresents a difference in lightness between cyan ink and a blank area, &#x394;Lrepresents a difference in lightness between magenta ink and the blank area, and &#x394;Lrepresents a difference in lightness between light blue ink and the blank area. Further, the color material of light blue satisfies the following condition.+()/2&#x2266;&#x2212;()/2Here, hrepresents a hue of the cyan ink, hrepresents a hue of the magenta ink, hrepresents a hue of the image printed with the cyan ink and the magenta ink in the same amount, and hrepresents a hue of the light blue ink.

Recording is performs that suppresses ink discharge position deviation between scans while suppressing graininess in a case of using multiple types of ink.

Recording apparatus for reducing discharge position deviation of discharged ink, and recording method for the same

A recording apparatus includes a recording head including a plurality of recording elements arranged in a predetermined direction, and a determination unit configured to determine a first mode in which a specified image is recorded or a second mode in which a pattern is recorded in each of recording scannings in forward and backward directions to form an adjustment pattern for adjusting a recording position in the intersecting direction of the recording head, and the recording position of the recording head in accordance with the formed adjustment pattern is adjusted, in which a driving unit controls driving of the recording elements in a manner that a correspondence relationship between positions in the predetermined direction and the intersecting direction among a plurality of dots that form the same column is varied or is the same in the recording scannings in the forward and backward directions in accordance with the determined mode.

The driving order of driving blocks is controlled so that ink landing positions from driving blocks differ from each other in multiple scans. Recording data is generated so that, of pixels where ink is discharged in one scan, the number of pixels adjacent at both sides in the scanning direction to pixels where ink is discharged in another scan is greater than the number of pixels not adjacent at both sides in the scanning direction to pixels where ink is discharged the other scan.

A dental syringe that facilitates the expulsion of air from a syringe body when dental material is injected into the syringe body from a discharge port of the syringe body and the discharge of the dental material from the syringe body during use for treatment. The syringe includes a syringe body, a plunger, and an O-ring that is mounted in an engagement groove formed at a front end portion of the plunger. The engagement groove includes a shallow groove at the front end side and a deep groove at the rear end side. When the dental material is injected into the syringe body, the O-ring engages with the shallow groove, and when discharging the dental material, the O-ring engages with the deep groove.

Dental syringe

In a printing apparatus including a printhead and a print control unit, wherein the printhead includes two nozzle arrays, each arranged in a first direction and including nozzles arranged along a second direction, the print control unit performs a first operation of expanding print data onto a memory, a second operation of selecting, for each nozzle array, some of the nozzles as non-driving nozzles and the remaining nozzles as driving nozzles, and a third operation of distributing the expanded print data to the two nozzle arrays such that dots corresponding to the non-driving nozzles of one nozzle array are printed by the driving nozzles of the other nozzle array.

Printing apparatus and driving control method for printhead

A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each array including nozzles arrayed in a second direction, a determining unit for determining discharge nozzles and non-discharge nozzles for each array, a conveying unit for conveying a sheet to the first direction, a unit configured to perform (a) determining printing data such that dots corresponding to the non-discharge nozzles in one array are printed by the discharge nozzles in another array, (b) inserting null data into the printing data based on a shift amount of between printing positions of the two nozzle array, and (c) newly determining discharge nozzles and non-discharge nozzles by the determining unit based on the printing data including the null data.

Printing apparatus and driving method therefor

A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each including nozzles arrayed along a second direction, a conveying unit for conveying a sheet in the first direction, a driving unit for driving the printhead so that each nozzle performs preliminary discharge on the sheet, and a unit configured to perform selecting some nozzles as non-driving nozzles and the remaining nozzles as driving nozzles for every column data in image data, determining image data to be assigned to each array as a first data so that a dot corresponding the non-driving nozzle in one of the two arrays is printed by the driving nozzle in the other, determining data for preliminary discharge as a second data so that each driving nozzle performs preliminary discharge, and ORing the first and second data.

If a plurality of ejection openings at identical positions in an array direction in which ejection openings are arrayed have experienced an ejection failure, complementary nozzles are selected so that the distance between ejection openings at both ends of the plurality of ejection openings in a cross direction crossing the array direction is the shortest.

Growing community of inventors

Kawasaki, Japan

Fumiko Suzuki