Canon Kabushiki Kaisha

Toshiyuki Chikuma

Kiichiro Takahashi

Hitoshi Nishikori

Naoji Otsuka

Osamu Iwasaki

Hidehiko Kanda

Minoru Teshigawara

Norihiro Kawatoko

Jiro Moriyama

Masashi Hayashi

Hirokazu Tanaka

Atsushi Sakamoto

Yuji Hamasaki

Takeshi Yazawa

Aya Hayashi

Yutaka Kano

Hirokazu Yoshikawa

Yuhei Oikawa

Hitoshi Sugimoto

Tetsuya Edamura

Takatoshi Nakano

Kohei Sato

Wakako Yamamoto

Yuji Konno

Satoshi Seki

Kenichi Oonuki

Kaneji Yamada

Takuya Fukasawa

Susumu Hirosawa

Hiroshi Taira

Kei Kosaka

Wakako Tanaka

Hinako Ojiro

Aya Sugimoto

Hiroshi Tajika

Masao Kato

Kentaro Yano

Mitsuhiro Ono

Daigoro Kanematsu

Tsutomu Takahashi

Daisaku Ide

Hideaki Takamiya

Naoji Ohtsuka

Hisatsugu Naito

An ejection apparatus includes an ejection head, and a recessed portion, a wiper, an installation unit, and a moving unit configured to move the blade and the ejection head relative to each other, wherein the wiper performs a wiping operation for wiping the ejection head to wipe the ejection port after wiping the recessed portion, and wherein in the wiping operation, a first wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a first distance in a direction perpendicular to the ejection port surface, and a second wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a second distance in the direction perpendicular to the ejection port surface, the second distance being larger than the first distance.

Ejection apparatus and wiping method

An ejection apparatus includes an ejection head having an ejection port surface and configured to eject a liquid to a recording medium for recording, a wiper configured to wipe the surface, and a moving unit configured to relatively move the wiper and the head to move the wiper in a first direction along the surface with respect to the head. The apparatus performs a first mode for performing the wiping while relatively moving the wiper and the head at a first speed, and a second mode for performing the wiping while relatively moving the wiper and the head at a second speed higher than the first speed. When the apparatus performs the wiping after the recording and then performs subsequent recording, the apparatus performs the second mode. When the apparatus performs the wiping after the recording and then performs no subsequent recording, the apparatus performs the first mode.

A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Printing apparatus and control method therefor

A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value, based on the first and second information.

Printing apparatus and discharge status judgment method

A printing apparatus using a printhead that includes an inspection circuit for inspecting an ink discharge status for each nozzle performs an inspection processing. The apparatus selects a nozzle as a target of inspection of the ink discharge status, sets a threshold value for inspecting a detection result of a temperature detection element corresponding to the selected nozzle, and uses the inspection circuit and the set threshold value. The apparatus receives, from the printhead, an inspection result for the selected nozzle, determines, based on the received inspection result, a threshold value to be used by the inspection circuit for inspecting the discharge status of the selected nozzle in a subsequent inspection, and stores the determined threshold value in a memory.

An image forming apparatus includes a printhead in which a plurality of element substrates for discharging a print material are arranged; a heating unit that maintains a temperature within the element substrate at a target temperature for each of the plurality of element substrates; a detection unit that detects the temperature within the element substrate for each of the plurality of element substrates; and a control unit that, for each of the plurality of element substrates, compares a highest temperature within the element substrate that is detected by the detection unit with a predetermined threshold, and if the highest temperature exceeds the predetermined threshold, sets the target temperature for the element substrate at a temperature which is higher than a target temperature set when the highest temperature does not exceed the predetermined threshold and lower than the predetermined threshold.

Image forming apparatus and control method therefor

An object of the present disclosure is to acquire an accurate temperature of a print head. The present disclosure is an ink jet printing apparatus comprising a print head, a transmission unit configured to transmit a control signal, and a detection unit configured to detect a temperature by reading an output of a Di sensor after the transmission, and as drive conditions for driving a printing element, there is a plurality of drive conditions whose driving cycle of the printing element is different from one another, within a predetermined period in length in accordance with the driving cycle, transmission of a control signal and temperature detection are performed, a part of a line used for transmission of the control signal and a part of a line connected with the Di sensor are in common.

Ink jet printing apparatus, control method thereof and storage medium

A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value based on the first and second information.

A recording apparatus includes a recording head that includes a plurality of recording devices containing ink, first and second heating devices, and first and second detection devices. The recording devices each generate energy for ejection of the ink, the first and second heating devices respectively heat the ink in a vicinity of recording devices located at first and second positions of the recording devices, and the first and second detection devices respectively detect temperatures in the vicinity of the recording devices located at the first and second positions. The recording apparatus includes an acquisition unit configured to acquire information relating to a representative temperature of the temperatures detected by the first and second detection devices, and a decision unit configured to decide an upper limit of driving power of each of the first and second heating devices.

Recording apparatus and recording method

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

In a case in which a cumulative value &#x3a3;Nure of wetting coefficients is less than a wetting threshold value THNure, printing is carried out on a unit area through a print mode in which an image is completed through a first number of instances of a scan, and in a case in which the cumulative value &#x3a3;Nure is equal to or greater than the wetting threshold value THNure, printing is carried out on a unit area through a print mode in which an image is completed through a second number of instances of the scan, where the second number is greater than the first number.

Printing apparatus and printing method

In an ink jet printing apparatus and control method using a plurality of parts of a printing unit, ink ejection can be immediately started. First and second heating units heat first and second parts of the printing unit. Each of the first and second heating units performs heating when the temperature of each of the first and second parts of the printing unit is lower than a reference temperature, and stops heating when the temperature of each of the first and second parts of the printing unit is at least equal to the reference temperature. A control unit controls ejecting of ink from the printing unit such that the printing unit starts ejecting ink according to both first and second information, the first and second information indicating that the temperature of the first and second parts of the printing unit once reached the reference temperature under certain circumstances.

Ink jet printing apparatus and method for controlling ink jet printing apparatus

There is provided an image processing apparatus in which in a case of tone-expressing one pixel corresponding to a plurality of areas (printing resolution) in a multi-pass print, it is possible to output a uniform image without graininess or density unevenness over all-tone regions from a low-density region to a high-density region. To this end, by referring to dot patterns in which a print or a non-print of dots onto each pixel (area) corresponding to a printing resolution are in advance defined, quantization data is converted into binary data having the higher printing resolution. At this time, the dot patterns are prepared to be different from each other for M times of scans in a multi-pass print of M passes. In consequence, it is possible to restrict a variation of a coverage ratio due to a printing position displacement in each printing scan.

Image processing apparatus and image processing method

A printing apparatus comprising, a printhead including an element array in which a plurality of printing elements are arrayed, scanning unit configured to reciprocally scan the printhead, driving unit configured to time-divisionally drive the printing elements, conveyance unit configured to convey a printing medium, and setting unit configured to set a driving order, wherein the conveyance unit performs a first conveyance operation of conveying the printing medium by a conveyance amount which is an integer multiple of a width of the group of the time-divisional driving, and a second conveyance operation of conveying the printing medium by a conveyance amount which is not an integer multiple of the width of the group, and the setting unit sets the driving order in the time-divisional driving for each scan based on the conveyance amount by the conveyance unit.

Printing apparatus and processing method thereof

Growing community of inventors

Kawasaki, Japan

Toshiyuki Chikuma