Canon Kabushiki Kaisha

Hiroaki Shirakawa

Taku Yokozawa

Yuhei Oikawa

Yosuke Ishii

Mitsutoshi Nagamura

Hiroaki Komatsu

Satoshi Azuma

Hiroshi Taira

Masaki Nitta

Satoshi Hayashi

Kazuo Suzuki

Yasunori Fujimoto

Masaya Uetsuki

Kazuhiko Sato

Hideo Fukazawa

Kouhei Tokuda

Shigeru Watanabe

Takaaki Yamaguchi

Masataka Kato

Hiroki Tajima

Toshimitsu Danzuka

Takayuki Ono

Kazunari Fujii

Mitsuru Kurata

Itaru Watanabe

Toshio Negishi

Toshiro Sugiyama

Naoshi Inoue

Eiichi Adachi

Tsuyoshi Mikoshiba

Syuu Utzui

Takeshi Kouda

A recording apparatus is capable of executing multiple types of different temperature control. A recording head of the recording apparatus has multiple temperature sensors disposed at different positions from each other in the recording head. Each of the multiple types of different temperature control is performed based on representative temperatures acquired using different combinations of the temperature sensors.

Ink jet printing apparatus and ink jet printing method

After printing is performed by driving only some printing elements, the other printing elements are driven so that kogation is deposited on the surface of the other printing elements.

A driving pulse to be applied is changed when an overlapped level of invert timing of driving pulse is large.

Recording elements are driven by changing a driving pulse applied thereto in accordance with information regarding a total number of times the recording elements have been driven.

Inkjet recording apparatus and inkjet recording method

A driving pulse to be applied to a plurality of print elements in a print element array is decided based on the deviation of the discharge amount from the print elements.

Inkjet printing apparatus and inkjet printing method

A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.

Substrate for liquid ejection head, liquid ejection head, and apparatus and method for ejecting liquid

In a case where the temperature difference between first and second time points detected by a first temperature sensor provided in a print head is lower than a threshold temperature, a temperature correction for the first temperature sensor is performed based on a temperature detected by a second temperature sensor provided within a printing apparatus thereof. In a case where the temperature difference is higher than the threshold temperature, a temperature correction for the first temperature sensor is performed without using the temperature detected by the second temperature sensor.

Ink-jet printing apparatus and ink-jet printing method

According to an aspect of the present invention, temperatures at a plurality of different positions in an array direction in an ejection opening array are detected, and heating by a heating element is executed in a case where a temperature difference between the temperatures is higher than a predetermined threshold.

Image recording apparatus, image recording method, and non-transitory computer-readable storage medium

First heating is started at a first time point, and a second heating having higher heating energy than the first heating is started at a second time point subsequent to the first time point.

Ink jet printing apparatus, ink jet printing method, and non-transitory computer-readable storage medium

The present invention relates to an ink jet recording apparatus including a recording head including a plurality of energy generation elements configured to generate thermal energy. The ink jet recording apparatus includes a specification unit and a control unit. The specification unit specifies a pulse width upper limit value of a prepulse during a recording operation based on a minimum pulse width by which ink is discharged by applying a drive pulse to the energy generation elements and a temperature of the recording head during the recording operation. The control unit controls the energy generation elements to be driven using a drive pulse of a prepulse with a pulse width equal to or less than the pulse width upper limit value.

Ink jet recording apparatus

Provided are an inkjet printing apparatus, whereby pulse drive periods and a pause period can be adjusted so as to fall within predetermined periods, while the volume of ink to be ejected is ensured, and a heat generating element driving method therefor. For the inkjet printing apparatus, a pulse signal drive period for a pulse driven previously, a pulse signal drive period for a pulse driven subsequently and a pause period are set to perform ejection of ink droplets one time. When the ejection period exceeds the threshold value, the pulse signal drive period for the pulse driven subsequently and the pause period are reduced to adjust the ejection period to be equal to or lower than a threshold value.

Inkjet printing apparatus and driving method

An inkjet printing apparatus which performs printing by performing scanning using a print head has a problem in that quality of an image of a ruled line is degraded when ink is not ejected for a certain period of time. To address this problem, control is performed such that power for driving the print head for unit regions including pixels having a ruled-line attribute becomes higher than power for driving the print head for unit regions which do not include the pixels having the ruled-line attribute. By this, a high-quality ruled-line image may be printed.

Printing apparatus and printing method

A recording apparatus including a recording head that includes an element array of a plurality of recording elements for discharging a liquid, the plurality of recording elements in the element array being divided into groups, and a drive unit configured to drive the recording head in a driving mode selected from a plurality of driving modes including a continuous driving mode in which recording elements in each of the groups are driven in order from one end and a distributed driving mode in which recording elements in each of the groups are driven such that adjacent recording elements are not driven sequentially.

Recording apparatus and method for controlling recording apparatus

An inkjet recording apparatus predicts the volume of air bubbles generated in a storage section of a recording head based on an input recording job. When the volume of the amount of ink in the storage section of the recording head is less than the predicted volume of air bubbles, a recovery operation is performed.

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Kawasaki, Japan

Hiroaki Shirakawa