Abstract: 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.

Abstract: 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.

Abstract: Although a conventional method of inspecting an ink discharge state in which the temperature change of the heater is detected enables accurate and high-speed inspection, due to the situation in which the inspection was performed, appropriate post-processing depending on the situation cannot be executed based on a result of the inspection. Therefore, it is necessary to determine the ink discharge state in detail. According to an embodiment of the present invention, a plurality of modes are provided in accordance with the purpose of performing an inspection of the ink discharge state, and a discharge inspection threshold is provided for each of these modes. By selectively executing or continuously executing these modes, it is possible to determine the ink discharge state in more detail.

Abstract: 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.

Abstract: A printing apparatus, that 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.

Abstract: An image forming apparatus comprises: 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 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.

Abstract: According to an embodiment of this invention, a printing apparatus using a printhead that includes an inspection circuit for inspecting an ink discharge status for each nozzle performs the following 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 elements 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.

Abstract: An image forming apparatus 101 capable of performing printing with a high image quality, and a control method of the image forming apparatus 101 are provided. For this purpose, a threshold value Dt is preliminarily set that allows printing without occurrence of blur, for each of preliminarily set monitoring areas A. In the case where a print duty for each of the monitoring areas A has exceeded the threshold value Dt, an ejection frequency of ink and conveying speed of a print medium are reduced in association therebetween.

Abstract: 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.

Abstract: 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.

Abstract: With respect to an area quantized by using an area of part in a quantization pattern and also without using an area of the other part in the quantization pattern in quantized data, a mask pattern part corresponding to the area of the part among mask pattern parts constituted by dividing a mask pattern is applied.

Abstract: In a printing apparatus including a printhead and a print control unit, wherein the printhead includes two nozzle arrays, each arranged in a first direction and including nozzles arranged along a second direction, the print control unit performs a first operation of expanding print data onto a memory, a second operation of selecting, for each nozzle array, some of the nozzles as non-driving nozzles and the remaining nozzles as driving nozzles, and a third operation of distributing the expanded print data to the two nozzle arrays such that dots corresponding to the non-driving nozzles of one nozzle array are printed by the driving nozzles of the other nozzle array.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each array including nozzles arrayed in a second direction, a determining unit for determining discharge nozzles and non-discharge nozzles for each array, a conveying unit for conveying a sheet to the first direction, a unit configured to perform (a) determining printing data such that dots corresponding to the non-discharge nozzles in one array are printed by the discharge nozzles in another array, (b) inserting null data into the printing data based on a shift amount of between printing positions of the two nozzle array, and (c) newly determining discharge nozzles and non-discharge nozzles by the determining unit based on the printing data including the null data.

Abstract: With respect to an area quantized by using an area of part in a quantization pattern and also without using an area of the other part in the quantization pattern in quantized data, a mask pattern part corresponding to the area of the part among mask pattern parts constituted by dividing a mask pattern is applied.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each including nozzles arrayed along a second direction, a conveying unit for conveying a sheet in the first direction, a driving unit for driving the printhead so that each nozzle performs preliminary discharge on the sheet, and a unit configured to perform selecting some nozzles as non-driving nozzles and the remaining nozzles as driving nozzles for every column data in image data, determining image data to be assigned to each array as a first data so that a dot corresponding the non-driving nozzle in one of the two arrays is printed by the driving nozzle in the other, determining data for preliminary discharge as a second data so that each driving nozzle performs preliminary discharge, and ORing the first and second data.

Abstract: A sheet is conveyed with no slack between a first conveying path and a second conveying path, thus allowing a high-quality image to be printed on the sheet and suppressing a possible sheet jam. A conveying path with a changeable conveying path length is provided between a first conveying path including a pair of downstream side conveying rollers and a pair of downstream side conveying rollers and a second conveying path including a pair of downstream side conveying rollers and a pair of downstream side conveying rollers.

Abstract: According to an embodiment, a printing apparatus for printing an image on a print medium by a printhead while relatively scanning the printhead, and discharging ink from the printhead to the print medium is controlled as follows. That is, a time corresponding to a print resolution in a scanning direction of the printhead is divided into a plurality of times, and these print elements are time-divisionally driven by using the divided times as driving timings. At this time, it is controlled to form a plurality of groups each including a predetermined number of adjacent print elements of the print elements, and change the driving timings for each of the groups using the divided time as a unit.

Abstract: In the case of printing a test pattern with an inkjet print apparatus, two printing modes are prepared. In one printing mode, a preliminary ejection on the printing medium is performed during printing of a test pattern, and in the other printing mode, the preliminary ejection on the printing medium is not performed during printing of a test pattern. For a test pattern that is, if the test pattern is printed under the same condition as that for an actual image, convenient for a subsequent correction, the preliminary ejection on the printing medium is performed during printing of the test pattern. On the other hand, for a test pattern in which, if an irrelevant dot is printed within the pattern, inconvenience is taken into consideration in a subsequent correction, the preliminary ejection on the printing medium is not performed during printing of the test pattern.

Abstract: The invention provides a printing apparatus and a recovery method therefore which can minimize ink consumption in a recovery process for a print head of the apparatus. The invention has a control unit to cause a print head to eject ink from nozzles arrayed on the print head so as to recover ink ejecting function of the nozzles, and a specification unit to specify a set print mode selected from among a plurality of print modes. The print modes define number and position of nozzles in use for printing an image. The control unit executes a first preliminary ejection process before or after printing an image on a print medium. The first preliminary ejection process has selectively ejecting ink from both of the nozzles in use selected by the currently set print mode and the unused nozzles in the vicinity of the nozzles in use.

Abstract: A printing apparatus comprising a printhead including two nozzle arrays neighboring in a first direction, each array including nozzles arrayed in a second direction, a determining unit for determining discharge nozzles and non-discharge nozzles for each array, a conveying unit for conveying a sheet to the first direction, a unit configured to perform (a) determining printing data such that dots corresponding to the non-discharge nozzles in one array are printed by the discharge nozzles in another array, (b) inserting null data into the printing data based on a shift amount of between printing positions of the two nozzle array, and (c) newly determining discharge nozzles and non-discharge nozzles by the determining unit based on the printing data including the null data.