JP2006043923A - Recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink jet recorder capable of outputting an image stably without increasing the recording time by sustaining the temperature between a plurality of recording element arrays ejecting the same kind of ink as uniformly as possible. <P>SOLUTION: Temperature information of a plurality of recording element arrays ejecting the same kind of ink is acquired, respectively, and recording rate of each recording element array is controlled depending on the temperature information thus acquired. Consequently, recording operation can be sustained at least temporarily even if the temperature of a part of nozzle arrays exceeded a threshold. Even if there is a risk of over temperature rise, interruption time of recording operation is shortened as much as possible and output can be completed in a short time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink jet recording apparatus, and more particularly to a recording operation at an excessive temperature rise in a thermal recording head.

  With the recent spread of information processing equipment such as personal computers, recording devices as image forming terminals have been rapidly developed and spread. In particular, among various recording apparatuses, an ink jet recording apparatus that performs recording on a recording medium such as paper, cloth, a plastic sheet, and an OHP sheet by ejecting ink from an ejection port is a low-noise non-impact recording method. It has excellent features such as high-density and high-speed recording operations, easy compatibility with color recording, and low cost, and is now the mainstream of personal-use recording devices. ing. Further, in recent years, in the ink jet recording apparatus, the recording resolution has been increased and the speed has been dramatically increased, and it has become possible to output higher quality images at high speed.

  In an ink jet recording apparatus, a recording head for ejecting ink according to an image signal is used. The recording head includes a plurality of recording element arrays corresponding to a plurality of colors of ink, and each recording element array includes a plurality of recording elements that can eject predetermined ink. There are several methods for ejecting ink from the recording elements, but the thermal method in which an electrothermal transducer such as a heater is arranged in the ink path of each recording element has excellent drive frequency response. In particular, it is particularly useful because of its many advantages, such as being able to arrange the recording elements at a relatively high density.

  In such an ink jet recording apparatus, in order to further improve the recording resolution and the recording speed, a technique for arranging recording elements at a higher density and ejecting fewer droplets, and further ejecting from each recording element. Technologies for driving at high frequencies have been developed. On the other hand, a configuration in which a plurality of recording element arrays for ejecting the same type of ink are arranged on the same recording head has been proposed and implemented.

  FIG. 1 is a schematic diagram for explaining a configuration in which a plurality of recording element arrays for ejecting the same type of ink are arranged on the same recording head. The recording head 101 is provided with recording element arrays 102 to 106 for a plurality of colors. Each print element array ejects cyan (C), magenta (M), yellow (Y), magenta (M), and cyan (C) inks in order from the left. Reciprocal movement is possible in the direction. While the recording head 101 is moving and scanning at a predetermined speed, ink droplets are ejected from each recording element at a timing corresponding to the image signal, thereby forming an image for one scanning on the recording medium. As shown in the figure, the recording element arrays arranged on the recording head 101 are symmetrical in ink color, so that the recording medium can be used regardless of whether the recording head performs a recording operation in the forward direction or the backward direction in the figure. On the top, ink is applied in the order of cyan, magenta, yellow, magenta, and cyan.

  Conventionally, in a serial type recording apparatus, such bi-directional recording has been a recording method that should be adopted by all means in order to significantly increase the recording speed. However, it is known that in an ink jet recording apparatus, an adverse effect on an image occurs due to a difference in color developability depending on the order of ink application to a recording medium, and it is generally difficult to employ bidirectional recording. It was. However, in the case of a recording head of each color target type as shown in FIG. 1 (hereinafter simply referred to as a symmetric head), the order of ink application to the recording medium is kept constant regardless of whether it is the forward path or the backward path. . Therefore, the problem of color development due to the order of ink application is solved, and more speedy bidirectional recording can be realized.

  When recording an image with such a symmetrical head, for example, the recording data input for cyan is distributed to the two recording element arrays 102 and 106. That is, data not recorded in the recording element array 102 is recorded in the recording element array 106, and data recorded in the recording element array 102 is not recorded in the recording element array 106. Such distribution of print data is preferably distributed as evenly as possible between the two print element arrays, but the method is not particularly defined. For example, it may be distributed to two printing element arrays using mask data stored in a memory in the printing apparatus and having an interpolation relationship with each other.

  By the way, in thermal ink jet recording, a voltage pulse is applied to a heater in each recording element in accordance with a recording signal to cause foaming in the ink, and ink is ejected using this foaming energy. However, in this case, not all of the energy input to the heater is converted into ink ejection energy, and the remaining thermal energy is gradually stored in the recording head. Even if there is some heat storage, if the recording is performed while maintaining a certain speed, the amount of heat storage stays within a predetermined range due to heat radiation from the recording head, and this does not cause a big problem. However, as in recent years, when a large number of printing elements are arranged at a higher density and driven at a higher frequency, the temperature rise situation becomes worse than before, and ink ejection is not possible. Problems arise, such as stabilization and ejection itself. Furthermore, the life of the recording head itself may be reduced by heat, leading to failure. In response to the above problems, several methods for suppressing excessive temperature rise of the recording head in the thermal ink jet recording apparatus have already been proposed and implemented. For example, in Patent Document 1, when the temperature of the recording head is detected and the temperature is equal to or higher than the first threshold, the recording operation is interrupted, and the recording is resumed when the temperature is equal to or lower than the second threshold value smaller than this. A method is disclosed. Patent Document 2 discloses a method for controlling the recording operation by not only acquiring the current temperature of the recording head but also predicting the degree of future temperature rise from image data to be recorded. Further, Patent Document 3 discloses a method of detecting the temperature of the recording head and the ambient temperature where the recording apparatus is placed, and controlling the subsequent recording operation from the relationship between the two.

  Of course, the method disclosed in the patent literature described above can be applied to the above-described symmetrical head.

Japanese Patent Publication No. 03-4394 US Pat. No. 4,910,528 Japanese Patent Laid-Open No. 11-020148

  However, when the method of the above-mentioned patent document is applied to a symmetrical head as it is, it cannot be said that an efficient countermeasure is necessarily taken. In the above-described prior art, since there is a premise that there is only one printing element array that ejects a predetermined color, when the temperature condition of the printing element array exceeds a predetermined value, It was necessary to interrupt the recording of the recording element array or to reduce the number of recording elements applied to the recording. As a result, the recording time has increased. However, in the case of a symmetric head, even when the temperature condition of a certain printing element row becomes a predetermined value or more, there is a printing element row that can be substituted for this printing element row. The present inventors pay attention to this point, and in a recording apparatus using a symmetric head, a recording sequence peculiar to a symmetric head different from the conventional method is performed before adopting the conventional method that increases the recording time. I came to propose to do.

  That is, an object of the present invention is to provide an ink jet recording apparatus that can maintain a uniform temperature between a plurality of recording element arrays that discharge the same type of ink as much as possible and output a stable image without increasing a recording time. Is to provide.

  Therefore, in the present invention, a plurality of recording element arrays each having a plurality of recording elements arranged in a predetermined direction are provided, and at least one set of the recording element arrays among the plurality of recording element arrays supplies the same type of ink. In an ink jet recording apparatus that forms an image on a recording medium by using a dischargeable recording head and ejecting ink according to recording data, temperature information acquisition means for acquiring temperature information of each of the plurality of recording element arrays; And control means for controlling the recording rate of each of the recording element arrays in accordance with the temperature information obtained from the temperature information acquisition means.

  According to the present invention, even if the temperature of some of the nozzle rows exceeds the threshold value, the recording operation can be continued at least temporarily, so that there is a concern about overheating. Even so, the time for interrupting the recording operation can be suppressed as much as possible, and the output can be completed in a short time.

  Embodiments of the present invention will be specifically described below.

  FIG. 2 is a schematic diagram illustrating a configuration of a recording head applied in the present embodiment. The recording apparatus of the present embodiment forms an image with all six colors of Color 0, Color 1, and Color 2, in addition to cyan, magenta, and yellow. Color 0 to Color 2 are not particularly limited, but may include black ink or the like. In the figure, the print head 200 is provided with eight print element rows (hereinafter also referred to as nozzle rows) 201 to 208, and each print element row discharges the ink shown in the figure. Reference numerals 204 to 208 are the configurations of the target heads provided for cyan, magenta, and yellow. The cyan ink is ejected by two recording element arrays of C1 and C2, and the magenta ink is ejected by two recording element arrays each of M1 and M2. It is possible.

  In the recording head of the present embodiment, each recording element array is constituted by two recording element groups indicated by Even and Odd. In one recording element group, a plurality of recording elements are arranged at a pitch of 600 dpi (dots / inch; reference value) in the vertical direction in the figure, and the Even and Odd recording element groups are half pitch from each other in the vertical direction. Arranged in a shifted state. Therefore, by ejecting ink from each recording element while the recording head 200 moves in the direction of the arrow in the figure, an image can be formed on the recording medium at a recording density of 1200 dpi with respect to the vertical direction in the figure.

  Reference numerals 209 to 216 denote diode sensors for measuring the temperature in the vicinity of each printing element array. In the present embodiment, the overheated temperature protection sequence is executed according to the output values of the diode sensors 209 to 216.

  FIG. 3 is a perspective view for explaining a schematic configuration of a recording apparatus applicable in the present embodiment. The recording apparatus 50 of this example is a serial scan type inkjet recording apparatus, and a carriage 53 is guided by guide shafts 51 and 52 so as to be movable in the main scanning direction of an arrow A. The carriage 53 is reciprocated in the main scanning direction by a driving force transmission mechanism such as a carriage motor and a belt for transmitting the driving force. On the carriage 53, a recording head 200 (not shown in FIG. 3) and an ink tank 54 for supplying ink to the recording head 200 are mounted. The recording head 200 and the ink tank 54 may constitute an ink jet cartridge.

  After the paper P as a recording medium is inserted from the insertion port 55 provided at the front end of the apparatus, the transport direction is reversed, and then the paper P is transported in the sub-scanning direction indicated by the arrow B by the feed roller 56. The recording apparatus 50 performs sub-scanning of the paper P by a distance corresponding to the recording operation in which the recording head 200 is moved in the main scanning direction and ink is ejected toward the print area of the paper P on the platen 57. Images are sequentially recorded on the paper P by repeating the transport operation for transporting in the direction.

  FIG. 4 is a block diagram for explaining a control configuration in the ink jet recording apparatus of the present embodiment. In the figure, reference numeral 400 denotes an ink jet recording apparatus main body. A ROM 402 is a control program 403 for controlling the entire printing apparatus, an index pattern 404 storing dot arrangements used when converting from input resolution to output resolution, and used when executing multi-pass printing. In addition, a mask pattern 405 and a sorting mask pattern 406 which is a feature of the present invention are stored.

  Reference numeral 407 denotes a RAM. A RAM 407 develops a work buffer 408 for data development, a print buffer 409 for temporarily storing print data, a mask buffer 410 for developing an even nozzle mask pattern, and a mask pattern for an odd nozzle. The mask buffer 411, the index buffer 412 for developing the index pattern for the Even nozzle, the index buffer 413 for developing the index pattern for the Odd nozzle, and the like.

  A print buffer management module 414 manages each buffer used for recording. Reference numeral 415 denotes a print sequencer module of the printer engine unit that performs a recording operation.

  In the recording apparatus of this embodiment, it is assumed that 4-pass multi-pass recording is performed in normal recording. The multipass recording method will be briefly described below.

  FIG. 5 schematically shows a recording head and a recording pattern for explaining the multipass recording method. P0001 indicates a recording head. Here, for simplicity, it is assumed that it has 16 nozzles. As shown in the drawing, the nozzles are divided into first to fourth nozzle groups, and each nozzle group includes four nozzles. P0002 indicates a mask pattern for multi-pass printing, and the positions where each nozzle performs printing are indicated by black painting. The patterns recorded by each nozzle group are complementary to each other. When these patterns are overlapped, recording of a region corresponding to a 4 × 4 area is completed.

  Each pattern indicated by P0003 to P0006 shows a state in which an image is completed by overlapping recording scans. When each recording scan is completed, the recording medium is conveyed by the width of the nozzle group in the direction of the arrow in the figure. Therefore, the same area of the recording medium (area corresponding to the width of each nozzle group) is configured such that an image is completed only after four recording scans. As described above, each same area of the recording medium is formed by a plurality of nozzle groups in a plurality of scans, thereby reducing nozzle-specific variations, variations in the conveyance accuracy of the recording medium, and the like, and smoothing the image. effective.

  Since the recording rate of each nozzle group is generally (1 / multi-pass number), in the case of 4-pass multi-pass printing as described above, the recording rate is 25%. In this embodiment, the mask pattern of each nozzle group is divided into an Even nozzle and an Odd nozzle and stored in the respective MASK buffers 410 and 411. In this example, four-pass multi-pass printing divided into four printing scans has been described as an example, but multi-pass printing is possible if multi-pass printing is divided into two or more printing scans. The effect of can be obtained. The higher the number of multi-passes, the higher the image quality can be expected, but the throughput decreases.

  In the cyan and magenta inks of the present embodiment, not only print data is distributed to four print scans by multi-pass printing, but also print data is distributed to two nozzle groups.

  FIG. 6 is a schematic diagram for explaining a print data distribution configuration for cyan and magenta inks according to this embodiment. In the figure, reference numeral 601 denotes a mask pattern for multi-pass printing stored in the mask buffer 410 or 411. The vertical direction in the figure indicates the direction in which a plurality of nozzles are arranged on the recording head (sub-scanning direction), and each of the four divided areas is a mask corresponding to a nozzle group divided into four multi-pass numbers. The pattern is shown. Since the number of multi-passes in this embodiment is 4, the recording rate of the mask pattern given to each nozzle group is 25%. In the figure, attention is paid to a mask pattern 602 corresponding to the region shown as the third nozzle group in FIG. 5, and this is shown by a lattice pattern.

  For example, cyan ink will be described as an example. Two nozzle arrays C1 and C2 are prepared for ejecting cyan ink according to this embodiment. Therefore, normally, the pattern 602 thinned out to 25% for multi-pass printing is further divided into two, and 12.5% mask patterns 603 and 604 are prepared for C1 and C2, respectively.

  However, various states are assumed for the arrangement of the recording positions in the recording data, and the recording data is not always uniformly distributed by the multi-pass recording mask 601 and the distribution masks 603 and 604. In the 4-pass mask pattern 601, even if a recording rate of 25% is prepared for each nozzle group, the number of dots actually recorded is not equally divided into four. . There is inevitably some bias between the nozzle groups. The same applies to the distribution masks 603 and 604. Even if the recording rates of the mask patterns 603 and 604 corresponding to the nozzle rows C1 and C2 are set to 12.5% each, the number of dots actually recorded is not evenly distributed to both. Absent. Some deviation is inevitably caused in each nozzle row.

  As described above, when a deviation in the number of recording dots occurs between the nozzle arrays C1 and C2, a difference also occurs in the amount of heat stored in each nozzle array, that is, the temperature detected from the diode sensors 212 and 216. In such a case, conventionally, in order to prevent a recording failure due to heat accumulation, when one of the detected temperatures exceeds a threshold, a measure such as interrupting the recording operation has been taken. However, in this embodiment, before changing the recording operation itself, first, the pattern of the sorting mask is switched.

  FIG. 7 shows a print data distribution configuration used when the temperature detected by the diode sensor 216 of the nozzle row C1 exceeds a predetermined value and the temperature detected by the diode sensor 212 of the nozzle row C2 does not exceed the predetermined value. It is a schematic diagram for demonstrating. In FIG. 6, mask patterns 603 and 604 equally divided by 12.5% are prepared for C1 and C2, respectively, whereas in FIG. 7, 6.25% and C2 are used for C1. 18.75% mask patterns 701 and 702 are prepared. Here, the case where the detected temperature of C1 exceeds the threshold value has been described as an example, but of course, the case where the detected temperature of C2 is high or the detected temperature of M1 or M2 is high will be described with reference to FIG. The mask patterns 701 and 702 thus applied can be applied.

  FIG. 8 is a flowchart for explaining the steps during the recording operation in the recording apparatus of the present embodiment. When the recording operation is started, first, in step S51, the detected temperature in each nozzle row is acquired from the diode sensors 209 to 216.

  In a succeeding step S52, it is determined whether or not any of the plurality of detected temperatures obtained in the step S51 exceeds a predetermined threshold value. If no threshold is exceeded, the process proceeds to step S60, and one print scan is executed.

  If it is determined in step S52 that there is a nozzle row that exceeds the threshold value, the process proceeds to step S53, and it is determined whether or not nozzle rows other than C1, C2, M1, and M2 for which sorting recording is performed are included. .

  If it is determined in step S53 that the nozzle rows other than C1, C2, M1, and M2 for which the distribution recording is performed are included, the process proceeds to step S54, and the overheating sequence is executed. In the present embodiment, this overheating sequence temporarily interrupts the recording operation. While the recording operation is interrupted, the detection values of the diode sensors 209 to 216 are confirmed at predetermined time intervals, and if it is determined that the temperature of all the nozzle arrays has fallen below the threshold value, the process proceeds to step S60 for one recording scan. Execute.

  On the other hand, if it is determined in step S53 that the nozzle rows other than C1, C2, M1, and M2 for which sorting recording is performed are not included, the process proceeds to step S55, and a temperature that actually exceeds the threshold is detected. Determine the nozzle row.

  In a succeeding step S56, it is determined whether or not the temperatures of both of the two nozzle arrays (for example, C1 and C2) that perform the distribution recording have exceeded a threshold value. If it is determined that both exceed the threshold value, it is not possible to take the countermeasure described with reference to FIG. 7, and thus the process proceeds to step S54, and a normal overheating sequence is executed.

  On the other hand, if it is determined in step S56 that both of the two nozzle arrays (for example, C1 and C2) do not exceed the threshold, the process proceeds to step S57, and 18.75 is applied to the nozzle array that does not exceed the threshold. % Mask pattern 702 is set. In step S58, a 6.25% mask pattern 701 is set for the other nozzle row exceeding the threshold value.

  Next, proceeding to step S59, one printing scan is executed in accordance with the mask pattern set at step S57 and step S58.

  When the recording operation for one time is completed in step S59 or step S60, the process proceeds to step S61, and it is determined whether or not all the recording of the image to be recorded has been completed. If it is determined that all recording has been completed, this mode is terminated. If it is determined that there is still image data to be recorded, the process returns to step S51, and the detected temperature in each nozzle row is acquired again for the next recording scan.

  As described above, according to the present embodiment, even when the temperature of some nozzle rows exceeds the threshold, the recording rate of the nozzle row exceeding the threshold is lowered, and at the same time, the nozzle having a relatively low temperature By assigning the corresponding recording data to the columns, the recording operation can be continued at least temporarily. When such a printing operation is repeated for several printing scans, the detected temperature of the nozzle row C1 that has exceeded the threshold value may fall below the threshold value. In this case, as a result, the output of the image can be completed without interrupting the recording operation itself, that is, without reducing the throughput. Further, even after several printing scans in a state where the mask patterns 701 and 702 are applied, even if the detected temperature of the nozzle rows C1 and C2 eventually exceeds the threshold value, several times. Since the heat storage amounts of both are equalized during the recording scan, the time for interrupting the recording operation can be shortened as much as possible.

(Other embodiments)
In the above-described embodiment, the recording method based on multipass recording has been described. However, the effect of the present invention can be exhibited even in a situation where multipass recording is not executed. When multi-pass printing is not executed, no mask pattern is applied to nozzle rows other than C1, C2, M1, and M2. In each recording scan, all of the given recording data is recorded, and the sub-scanning amount of the recording medium is an amount corresponding to the width of the nozzle row.

  In the nozzle rows of C1, C2, M1, and M2, 50% mask patterns can be applied. At this time, a mask pattern having an interpolating relationship is applied to C1 and C2, and a mask pattern having an interpolating relationship is also applied to M1 and M2.

  FIG. 9 is a flowchart for explaining the steps during the recording operation when the multipass is not executed. When the recording operation is started, first, in step S41, the detected temperature in each nozzle row is acquired from the diode sensors 209 to 216.

  In a succeeding step S42, it is determined whether or not there is a temperature exceeding a predetermined threshold among the plurality of detected temperatures obtained in the step S41. If no threshold is exceeded, the process proceeds to step S49, and one printing scan is executed. That is, C1, C2, M1, and M2 perform a one-pass recording scan at a recording rate of 50% and the other nozzle rows at a recording rate of 100%.

  If it is determined in step S42 that there is a nozzle row that exceeds the threshold value, the process proceeds to step S43, and it is determined whether or not nozzle rows other than C1, C2, M1, and M2 for which sorting recording is performed are included. .

  If it is determined in step S43 that nozzle rows other than C1, C2, M1, and M2 for which distribution recording is being performed are included, the process proceeds to step S44, and an overheating sequence is executed. Also in the present embodiment, this overheating sequence temporarily interrupts the recording operation. While the recording operation is interrupted, the detection values of the diode sensors 209 to 216 are confirmed at predetermined time intervals, and if it is determined that the temperature of all the nozzle arrays has fallen below the threshold value, the process proceeds to step S49 and one recording scan is performed. Execute.

  On the other hand, if it is determined in step S43 that the nozzle rows other than C1, C2, M1, and M2 for which sorting recording is performed are not included, the process proceeds to step S45, and a temperature that actually exceeds the threshold is detected. Determine the nozzle row.

  In a succeeding step S46, it is determined whether or not the temperatures of both of the two nozzle rows (for example, C1 and C2) performing the distribution recording have exceeded a threshold value. When it is determined that both exceed the threshold value, the process proceeds to step S44, and a normal overheating sequence is executed.

  On the other hand, if it is determined in step S46 that both of the two nozzle arrays (for example, C1 and C2) do not exceed the threshold value, the process proceeds to step S47, and all the nozzle arrays that do not exceed the threshold value are processed. Sort recorded data. That is, recording data is not given to the other nozzle row exceeding the threshold value.

  Next, the process proceeds to step S48, and one recording scan is executed in accordance with the recording data set in step S47. That is, one-pass printing scan is executed using only nozzle rows that do not exceed the threshold.

  When the recording operation for one time is completed in step S48 or step S49, the process proceeds to step S50, and it is determined whether or not all the recording of the image to be recorded has been completed. If it is determined that all recording has been completed, this mode is terminated. If it is determined that there is still image data to be recorded, the process returns to step S41, and the detected temperature in each nozzle row is acquired again for the next recording scan.

  As described above, according to the present embodiment, when the temperature of a part of the nozzle rows exceeds the threshold value, the nozzle row exceeding the threshold value is not applied to the printing, and the nozzle row having a relatively low temperature is used. Record all recorded data. Thereby, the effect similar to embodiment mentioned above can be acquired.

  In the above-described embodiments, as shown in the respective flowcharts, the temperature of each nozzle row is detected every recording scan, and the distribution of recording data is controlled in units of recording scans. However, the present invention is not limited to such a method. For example, a mode in which the detection of temperature and the distribution of print data are controlled by using several print scans as one unit may be employed. Further, even when the temperature of each nozzle row is detected at the start of a recording job and the same recording method is adopted for all the jobs, the effect of the present invention can be obtained.

  In the above-described two embodiments, the target head described in FIG. 2 is used. However, as long as the recording head has at least one recording element array that can eject the same type of ink, The effect of the present invention can be obtained without using the target head.

  Furthermore, since the configuration and effects of the present invention are different from those of some of the above-mentioned patent documents, even if the technology described in these patent documents is combined with the present invention, each effect is independent. Can get to.

FIG. 5 is a schematic diagram for explaining a configuration in which a plurality of recording element arrays for ejecting the same type of ink are arranged on the same recording head. FIG. 2 is a schematic diagram illustrating a configuration of a recording head applied in an embodiment of the present invention. 1 is a perspective view for explaining a schematic configuration of a recording apparatus applicable in an embodiment of the present invention. It is a block diagram for demonstrating the structure of control in the inkjet recording device of embodiment of this invention. FIG. 3 is a diagram schematically illustrating a recording head and a recording pattern for explaining a multi-pass recording method. FIG. 4 is a schematic diagram for explaining a recording data distribution configuration for cyan and magenta inks according to an embodiment of the present invention. It is a schematic diagram for demonstrating the distribution structure of the recording data at the time of overheating. 4 is a flowchart for explaining a process during a recording operation in the embodiment of the present invention. 4 is a flowchart for explaining a process during a recording operation in the embodiment of the present invention.

Explanation of symbols

200 Recording head 201-208 Recording element array (nozzle array)
209 to 216 Diode sensor 601 4-pass multi-pass mask 602 Mask pattern corresponding to the region of the third nozzle group 603, 604 Sort mask 701, 702 Sort mask

Claims (7)

A recording head having a plurality of recording element arrays configured by arranging a plurality of recording elements in a predetermined direction and capable of ejecting the same type of ink by at least one set of the recording element arrays among the plurality of recording element arrays is used. In an inkjet recording apparatus that forms an image on a recording medium by ejecting ink according to recording data,
Temperature information acquisition means for acquiring temperature information of each of the plurality of recording element arrays;
An ink jet recording apparatus comprising: control means for controlling a recording rate of each of the recording element arrays in accordance with temperature information obtained from the temperature information acquisition means.   The temperature information acquisition means acquires temperature information of each of the plurality of recording element arrays using values detected from a plurality of sensors respectively provided in the vicinity of the plurality of recording element arrays. The inkjet recording apparatus according to claim 1. The inkjet recording apparatus includes a recording main scan that ejects ink from the plurality of recording elements while performing a scanning scan of the recording head, and a sub-scan that conveys the recording medium by a predetermined amount in a direction crossing the recording main scan. Is a serial type inkjet recording apparatus that forms an image on the recording medium by alternately repeating
When the temperature information corresponding to only one of the plurality of printing element arrays ejecting the same type of ink is higher than a predetermined threshold, the control means performs temperature information in at least one printing main scan. Is reduced so as to increase the recording rate of recording element arrays other than the recording element array whose temperature information is determined to be higher than a predetermined threshold. The inkjet recording apparatus according to claim 1, wherein the inkjet recording apparatus is controlled. The recording apparatus further comprises a plurality of types of mask patterns for controlling the recording rate of each of the recording element arrays,
The control unit controls the recording rate by associating an appropriate one of the plurality of types of mask patterns with each of the recording element arrays in accordance with the temperature information obtained from the temperature information acquisition unit. The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus is an ink jet recording apparatus. The inkjet recording apparatus includes a recording main scan that ejects ink from the plurality of recording elements while performing a scanning scan of the recording head, and a sub-scan that conveys the recording medium by a predetermined amount in a direction crossing the recording main scan. Is a serial type inkjet recording apparatus that forms an image on the recording medium by alternately repeating
When the temperature information corresponding to only one of the plurality of printing element arrays ejecting the same type of ink is higher than a predetermined threshold, the control means performs the ink in at least one printing main scan. Recording data to be recorded is controlled to be recorded only by a recording element array other than the recording element array in which the temperature information is determined to be higher than a predetermined threshold among the plurality of recording element arrays that eject the ink. The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus is an ink jet recording apparatus.   The control means controls to temporarily stop printing when temperature information corresponding to all of the plurality of printing element arrays ejecting the same type of ink is higher than a predetermined threshold value. The ink jet recording apparatus according to claim 1.   The recording head applies a voltage to an electrothermal transducer disposed in the recording element, thereby causing foaming in the ink filled in the recording element, and ejecting the ink by the energy of the foaming. The inkjet recording apparatus according to claim 1, wherein the inkjet recording apparatus is a thermal inkjet recording head.

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