Canon Kabushiki Kaisha

Jiro Moriyama

Hidehiko Kanda

Toshiharu Inui

Hiroshi Tajika

Kiichiro Takahashi

Hitoshi Sugimoto

Atsushi Sakamoto

Toshiyuki Chikuma

Masao Kato

Norihiro Kawatoko

Fumihiro Gotoh

Yuji Hamasaki

Hirokazu Tanaka

Minako Kato

Hiromitsu Hirabayashi

Yutaka Koizumi

Shigeyasu Nagoshi

Toshiaki Hirosawa

Noribumi Koitabashi

Torachika Osada

Masashi Hayashi

Yutaka Kurabayashi

Hisao Yaegashi

Mineo Kaneko

Hidemi Kubota

Isao Ebisawa

Osamu Iwasaki

Naoji Otsuka

Kentaro Yano

Yoshinori Nakagawa

Atsushi Arai

Daigoro Kanematsu

Yuji Akiyama

Atsuhiko Masuyama

Masaya Uetsuki

Nobuyuki Kuwabara

Yoshinori Nakajima

Hideaki Takamiya

Masahiko Umezawa

Haruhiko Moriguchi

Tetsuya Kawanabe

Yoshiyuki Imanaka

Makoto Aoki

Miyuki Matsubara

Yasushi Miura

Hisashi Fukushima

Masaaki Izumida

Tatsuyuki Tokunaga

Masami Izumizaki

Masami Ikeda

Toshio Kashino

Shinichi Sato

Sadayuki Sugama

Kenjiro Watanabe

Makoto Takemura

Hiroshi Sugiyama

Nobuyuki Hirayama

Takaaki Yamaguchi

Nobuyuki Watanabe

Takuya Hatsui

Koji Terasawa

Kimiyuki Hayasaki

Takeshi Okazaki

Souta Takeuchi

Muga Mochizuki

Kousuke Kubo

Hideo Fukazawa

Yoshihisa Takizawa

Masafumi Wataya

Hideto Yokoi

Takashi Uchida

Mayumi Yamamoto

Hideaki Kawamura

Shoji Koike

Takashi Sasaki

Hiroyuki Saito

Takahiro Mori

Yuji Konno

Takeshi Yazawa

Yoshiaki Murayama

Masahiro Takei

Akio Kashiwazaki

Koromo Shirota

Makoto Torigoe

Nobuaki Sakurada

Yoshiaki Takayanagi

Mamoru Sakaki

Tadashi Ishikawa

Miyuki Fujita

Takashi Endo

Masato Katayama

Yoshitaka Watanabe

Tetsuhiro Nitta

Hirokazu Yoshikawa

Susumu Hirosawa

Yoshio Uchikata

Masashi Ogasawara

Yasushi Murayama

Hiroto Matsuda

Hiroshi Yoshino

An ink-jet recording device is capable of correcting a recording position due to a leaning of a printing head and correcting of driving timing between multiple printing heads. Each nozzle row of a printing head is classified into multiple nozzle groups, and the driving timing of the nozzle groups other than the nozzle group serving as a reference of correction of the multiple nozzle groups is adjustable to correct for any leaning of the printing head. Moreover, in the event of performing the driving timing between printing heads, the driving timing of a non-reference printing head is adjustable relative to a reference printing head employed for leaning correction of multiple printing heads.

Ink-jet recording device and ink-jet recording control method

A printing apparatus and a conveyance control method are provided, both capable of detecting a print medium conveying state highly precisely in an entire process of conveying the print medium being printed. For this purpose, the surface of the print medium placed on the belt and the surface of the belt are detected to acquire the moving distance or moving speed of the print medium. Based on the moving distance or moving speed thus obtained, the driving of the belt is controlled. Even in a situation where the object being detected switches from the print medium to the belt in the middle of the conveying operation, the measurement of the moving distance can be performed without interruption by the same detection method using the same optical sensor unit.

Printing apparatus and object conveyance control method

Provided is a print position control method whereby displacement of a print position in a wide range can be corrected very accurately, without reducing a printing speed or increasing a manufacturing cost. Thus, a printing apparatus includes: a first correction unit, for correcting a print position at accuracy equal to the resolution of the printing apparatus; and a second correction unit, for correcting the print position at accuracy higher than the resolution and in the range of an area that corresponds to one pixel of the resolution. With this arrangement, the print position displacement in a wide range equal to or greater than one pixel can be corrected by the first correction unit, and a print position displacement smaller than one pixel can be corrected by the second correction unit. Therefore, correction of a print position displacement in a wide range is enabled at a higher accuracy.

Printing apparatus and control method with adjustment unit correcting the displacement of the print position by pixel unit, and another unit correcting the displacement by the unit smaller than the pixel

This invention reduces an unprinted stripe occurred by edge deviation of a printhead. An inkjet printing apparatus according to this invention can execute a first printing mode in which an image is printed by scanning the printhead in a first region on the printing medium N times and scanning the printhead in a second region adjacent to the first region (N+1) times, and a second mode in which an image is printed by scanning the printhead in the first region M times and scanning the printhead in the second region (M+1) times. The width, in the conveyance direction of the printing medium, of the second region printed in the second printing mode is narrower than the width, in the conveyance direction of the printing medium, of the second region printed in the first printing mode.

Inkjet printing apparatus and inkjet printing method

An ink jet printing apparatus printing on a print medium includes a print head having a plurality of ejection ports for ejecting ink while scanning in a scan direction, and a conveyance unit including a pair of rollers for conveying the print medium in a conveyance direction crossing the scan direction by rotation of the rollers. The rollers are provided at a position at an upper stream side in the conveying direction of the print medium from a print position at which printing by the print head is performed. A detection unit is configured to detect a downstream side end of the print medium conveyed by the pair of rollers, with the detection unit arranged at a position that is a distance from the pair of rollers, in the conveyance direction, corresponding to a length of the print medium. In addition, a change unit is configured to change the ejection ports available for printing according to an error in conveyance detected by the detection unit.

Ink jet printing apparatus

To achieve high-quality printing by controlling an ink-travelling direction by an electrostatic force so that the ink can be accurately applied on a printing medium, the ink is landed on a desired position of the printing medium effectively without disturbing the ink ejection, independent of a difference in the thickness of the printing medium. An electric field between a printing head and the printing medium is generated by applying a voltage to a platen of conductive material positioned immediately below the printing medium. At this point, the voltage applied to the platen is adjusted so that the electric field of a preferable intensity can be generated on a face of the printing head where ejection openings are formed irrespective of the thickness of the printing medium.

Inkjet printing apparatus

A printhead includes a driving unit configured to drive a plurality of heaters, a register configured to input data of a plurality of bits corresponding to the number of heaters, a latch configured holding the data transferred from the register; a generation unit configured to generate a control signal of the driving unit for each heater based on a value of the data and a change in a level of an enable signal including a plurality of pulse signals; and an output unit outputting the control signal generated by the generation unit to the driving unit in synchronism with the pulse signals.

Printhead, printing apparatus, and printhead driving method

A recording apparatus, performing recording by time-division driving of multiple recording elements on a recording head in increments of blocks, includes: a storing unit storing recording data; an obtaining unit obtaining information relating to inclination of the recording elements in the main scanning direction; a changing unit changing, in increments of recording elements, the main scanning direction storage position of recording data stored in the storing unit to be provided to recording elements of a group, configured of consecutive recording elements in each block of the recording elements, based on the obtained information; and a determining unit determining the driving order of the recording elements subjected to time-division driving in increments of the blocks, for each of the scans; wherein recording is performed based on recording data with the main scanning direction storage position having been changed by the changing unit, and the driving order determined by the determining unit.

Recording apparatus

The present invention provides an ink jet printing apparatus and a method for controlling temperature for the ink jet printing apparatus wherein the temperature of a print head, which may lower during printing, is controlled before printing without using any sub-heater to allow a favorable ejection condition to be established without reducing the head temperature below a predetermined value. Thus, scan width information and dot count information are acquired before a carriage starts scanning to determine the heating temperature of the print head on the basis of the information.

Apparatus and method for ink jet printing

To achieve high-quality printing by controlling an ink-traveling direction by an electrostatic force so that the ink can be accurately applied on a printing medium, the ink ejected to areas outside edges of the printing medium is prevented from being attracted to the end portions in margin-less printing. This configuration includes: a platen, made of a conductive material, positioned immediately below the printing medium; an absorber positioned at a side of the edge; and a mesh conductive member disposed on the absorber. A first voltage is applied to the platen, causing polarization in the printing medium, and a second voltage higher than the first voltage is applied to the conductive member. Thereby, ink ejected outside the edges in the margin-less printing, travels straight-forwardly toward the conductive member without being attracted to the end portions, and is absorbed into the absorber via the conductive member.

Inkjet printing apparatus and printing method

There are provided a printing apparatus and printing method capable of collecting unwanted ink mist and achieving high-quality printing by fine ink droplets. According to the method, the charges of a printing medium are removed prior to printing, and an ink mist collecting unit having an electrode of a positive polarity is employed. Floating ink mist is collected such that ink mist generated from discharged ink droplets and negatively charged is moved toward the ink mist collecting unit by the electrostatic force.

Printing apparatus, ink mist collecting method, and printing method

There are provided a printing apparatus and printing method capable of achieving high-quality printing by fine ink droplets, and collecting unwanted ink droplets. According to the method, ink droplets discharged from a printhead are negatively charged by the negative ions in printing. A printing medium is charged positively opposite to the polarity of ink droplets. By the electrostatic force, discharged ink droplets travel toward the printing medium, and the amount of ink droplets attached to the printing medium is increased. In addition, an ink mist collecting unit having a positive electrode is employed to collect floating ink mist.

Printing apparatus and printing method for discharging fine ink droplets using an ion emitter

The apparatus and method can suppress an increase in power consumption and reduce ink density unevenness caused by variations in the amount of ink discharge upon performing printhead temperature retaining control. The printing apparatus, which prints on a print medium by scanning a printhead having a printing element for generating thermal energy, includes a determination unit which predicts a maximum temperature which the printhead reaches in printing, and determines a target temperature based on the predicted maximum temperature, and an adjustment unit which adjusts the temperature of the printhead in printing on the basis of the target temperature.

Printing apparatus, printing system, printhead temperature retaining control method

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Kawasaki, Japan

Jiro Moriyama