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.

A printing apparatus according to the present invention includes a printhead with a plurality of print elements for generating energy used for printing an image on a print medium, a first temperature detection element and a second temperature detection element at positions different in a direction of a print element array in which the plurality of print elements are arrayed. The apparatus corrects a signal concerning a head temperature based on an output from the first temperature detection element, and corrects, based on the corrected signal concerning the head temperature, a signal concerning a head temperature output from the second temperature detection element.

An image recording apparatus includes a recording head including a plurality of nozzles from which ink is ejected, a memory, and one or more hardware processors coupled to the recording head and the memory. The one or more hardware processors are configured to: determine, for each of the plurality of nozzles, whether a position of the corresponding nozzle is a position to eject ink; determine whether a successive ejection operation is necessary for a nozzle out of the plurality of nozzles, whose position is determined as the position to eject ink; and cause ink to be successively ejected at the position to eject ink at a predetermined successive ejection frequency from the nozzle that is determined to have the necessity of the successive ejection operation.

An object of the present invention is to quickly correct a temperature sensor for an ejection head by, both efficiently and in a brief time, estimating a detected temperature of the temperature sensor for the ejection head in a case where the temperature of the ejection head of liquid becomes sufficiently close to an environment temperature. The temperature of a print head 1 is detected by a diode sensor 17 and the environment temperature is detected by a thermistor 10. Based on a change in the detected temperature of the diode sensor 17 at the time of filling of ink for the print head 1, the detected temperature of the diode sensor 17 in a case where the temperature of the print head 1 becomes close to the environment temperature is estimated as an estimated detected temperature. Based on a difference between the estimated detected temperature and the environment temperature, a correction value of the detected temperature of the diode sensor 17 is set.

A liquid ejecting head includes a flow passage member and an energy generating element. The flow passage member includes an individual flow passage including a nozzle and a pressure generating chamber communicating with the nozzle, a supply-side common flow passage, and a drain-side common flow passage. The energy generating element effects a pressure change in the liquid in the pressure generating chamber to discharge the liquid from the nozzle. The individual flow passage includes a supply-side individual flow passage between the supply-side common flow passage and the nozzle and a drain-side individual flow passage between the nozzle and the drain-side common flow passage. A second partition wall that separates a plurality of the drain-side individual flow passages from each other is thicker than a first partition wall that separates a plurality of the supply-side individual flow passages from each other.

A liquid discharge apparatus includes an apparatus body, a liquid discharge head configured to discharge a liquid and be removably attached to the apparatus body, and a temperature detection device configured to detect a temperature of the liquid discharge head. The temperature detection device includes a temperature detector disposed in the apparatus body and configured to be in line contact with the liquid discharge head.

Examples disclosed herein relate to an imaging device. Examples include a method for increasing the temperature of the imaging device by determining an internal temperature of the imaging device; determining if a start-up routine is to be initiated; pausing the start-up routine if the internal temperature is below a threshold temperature; and energizing at least one of a fan or heating element of the imaging device when the internal temperature is below the threshold temperature.

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.

Devices and method for performing temperature measurements in a printhead. In one embodiment, a printhead includes at least one row of jetting channels configured to jet droplets of a print fluid using piezoelectric actuators. A drive circuit includes an input voltage generator that applies a step voltage to a piezoelectric actuator of a jetting channel, and an output voltage detector that detects an output voltage across the piezoelectric actuator over time in response to the step voltage. The drive circuit also includes a temperature detector that determines a voltage response to the step voltage at the piezoelectric actuator based on the output voltage over time, and determines a temperature measurement for the piezoelectric actuator based on the voltage response of the piezoelectric actuator.

There is provided an image recording apparatus including: a head; a driving element; a controller configured to output, to the driving element, a driving signal having a first voltage level or a second voltage level greater than the first voltage level; and a moving mechanism causing one of the recording medium and the head to move relative to the other of the recording medium and the head. The controller sets the voltage level of the driving signal to be the first voltage level in a case that the controller causes the head to move relative to the recording medium at the first velocity; and the controller sets the voltage level of the driving signal to be the second voltage level in a case that the controller causes the head to move relative to the recording medium at the second velocity.