Canon Kabushiki Kaisha

Yosuke Ishii

Taku Yokozawa

Yuhei Oikawa

Hiroaki Shirakawa

Mitsutoshi Nagamura

Hiroaki Komatsu

Kazuo Suzuki

Satoshi Azuma

Hiroshi Taira

Kazuhiko Sato

Masaki Nitta

Satoshi Hayashi

Rie Takekoshi

Kei Yoshizawa

Keita Ishimi

Tatsuo Shimmoto

A generation unit, which is configured to process image data to generate print data for applying an ink and a reaction liquid such that the print data corresponds to respective passes, generates print data for the ink such that the ink is applied only in a pass of which the elapsed time after application of the reaction liquid to the print medium is equal to or longer than the first time and shorter than the second time. The first time is from the timing where the reaction liquid is applied to the print medium up to the timing where adjacent droplets of the applied reaction liquid come into contact with each other and coalesce to form a reaction liquid film. The second time is from the timing where the reaction liquid is applied to the print medium up to the timing where the formed reaction liquid film is dissolved.

Image processing apparatus, image processing method, printing apparatus, and storage medium

A technique for suppressing ejection failure at an ejection port, which is caused by reaction of reaction liquid and ink during a wiping operation, is to be provided. Before the ejection port surface, on which the first ejection port array that is capable of ejecting the ink and the second ejection port array that is capable of ejecting the reaction liquid which reacts with the ink are formed, is wiped by the maintenance unit that is capable of receiving the ink and the reaction liquid, ink that does not contribute to printing is ejected to an area of the maintenance unit between an area abutted by the first ejection port array during the wiping and an area abutted by the second ejection port array during the wiping.

Printing apparatus and maintenance method

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

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

The invention prevents inconveniences from being caused by ejection failure and unintended mixing of different colors. To this end, the invention performs preliminary ejection of ink after a wiping action to sweep mist adhering to a face of a printing head, in which an ejection opening is formed. Moreover, the amount of ink to be wastefully consumed by the preliminary ejection after the wiping is reduced. To this end, the number of preliminary ejections is regulated. The degree of adherence of mist to the ejection-opening-formed face depends on the amount of printing (the number of printed sheets, the number of ink ejections for printing, or the like). So, at the time of the preliminary ejection after the wiping, the number of ink ejections in the preliminary ejection is regulated in accordance with the amount of printing that has been done since the last wiping action.

Inkjet printing apparatus and method of controlling the same

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.

Growing community of inventors

Kawasaki, Japan

Yosuke Ishii