JP2011062840A - Inkjet recording apparatus and inkjet recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately suppress deviation of ink landing positions, regarding an inkjet recording apparatus configured to move a recording head having ejection arrays where a plurality of ejection ports are disposed side by side, with respect to a recording medium and eject the ink from the recording head to record on the recording medium. <P>SOLUTION: The inkjet recording apparatus includes: an acquisition means which obtains pieces of information about landing positions of the ink ejected from the recording head 20 to the recording medium P while moving the recording head 20 at a predetermined speed in a predetermined direction with respect to the recording medium P; and a correction control means configured to, in order to suppress the deviation of the ink landing positions, perform correction control of the ink ejection to be performed while moving the recording head 20 at the predetermined speed in the predetermined direction with respect to the recording medium P, based on the landing position information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus and an ink jet recording method for performing recording on a recording medium by ejecting ink from the recording head while moving a recording head having an ejection port array in which a plurality of ejection ports are arranged with respect to the recording medium. .

  An ink jet recording apparatus ejects ink (recording liquid), that is, ink droplets, from an ink ejection port of a recording head (printing head) and attaches (lands) the ink onto a recording medium, thereby including an image (including characters and lines). Record. However, conventionally, the recording head is not accurately positioned with respect to the carrier or carriage that supports the recording head, and for example, an ejection port array composed of a plurality of ejection ports is inclined with respect to the recording medium conveyance direction, which is a desired direction. Therefore, image formation could not be performed properly. In such a case, if an attempt is made to record a line that extends straight in the conveyance direction of the recording medium on the recording medium, a line inclined according to the inclination of the ejection port array is recorded, and the line is shifted and connected. There was a problem.

  In addition, in an ink jet recording apparatus in which a plurality of such recording heads are arranged in parallel and each recording head discharges different color inks to perform color printing, slight adhesion deviation (landing deviation) of ink causes linear quality. Causes deterioration. It is known that such landing deviation occurs when the recording head is mounted in a state where the ejection port array is inclined from a desired direction as described above.

  In order to prevent such deterioration of image quality due to the inclination of the ink discharge port array, Patent Document 1 makes the data selected by the inclination of the ink discharge port array variable and electrically corrects the landing deviation of the ink due to the inclination. The technology to do is disclosed.

JP 2004-009489 A

  Ink landing deviation occurs when the ink discharge port array is located on a plane parallel to the recording medium but is inclined with respect to a predetermined direction in the plane. However, there are other causes of ink landing deviation. Specifically, ink landing deviation also occurs when the ejection port array is inclined with respect to the recording medium on a plane intersecting the recording medium. This is because the interval between the discharge port at the upstream end in the recording medium transport direction in a certain discharge port array and the recording medium, and the discharge port at the downstream end in the recording medium transport direction in the same discharge port array and the recording medium. This is a case where there is a difference between the intervals.

  By the way, when the ejection port array is positioned on a plane intersecting with the recording medium, the ink landing deviation is caused by the movement direction (scanning direction) of the recording head with respect to the recording medium, that is, the moving speed (scanning). It varies depending on whether the (speed) is positive or negative. However, the ink landing deviation in such a case is not sufficiently considered in Japanese Patent Application Laid-Open No. 2004-151867.

  Therefore, the present invention was devised in view of such a point, and the purpose of the present invention is to prevent ink landing deviation even when the ejection port array is positioned on a plane intersecting the recording medium. It is to suppress appropriately.

  The present invention relates to an ink jet recording apparatus that performs recording on a recording medium by ejecting ink from the recording head while moving a recording head having an ejection port array in which a plurality of ejection ports are arranged with respect to the recording medium. The present invention also resides in an ink jet recording method using the same ink jet recording apparatus.

  The present invention acquires the landing position information of a plurality of inks ejected from a recording head on a recording medium, and discharges ink based on the landing position information so as to suppress the landing deviation of the ink. A configuration for correction control is provided. Preferably, the landing position information is landing position information of a plurality of inks ejected while moving the recording head with respect to the recording medium at a predetermined speed in a predetermined direction. Then, based on the landing position information, the ejection control of ink performed while moving the recording head with respect to the recording medium at the predetermined speed in the predetermined direction is corrected and controlled. For this purpose, the ink jet recording apparatus according to the present invention preferably includes an acquisition unit that acquires landing position information and a correction control unit that corrects and controls ink ejection. For this purpose, the ink jet recording method according to the present invention preferably includes an acquisition step of acquiring landing position information and a correction control step of correcting and controlling ink ejection.

  Specifically, in such ink ejection correction control, first, a correction value corresponding to a predetermined speed in a predetermined direction is calculated based on the landing position information so as to suppress ink landing deviation. . This is preferably performed by the correction value calculation means of the ink jet recording apparatus. Then, using the calculated correction value, it is possible to perform correction control of ink ejection while moving the recording head with respect to the recording medium at the predetermined speed in the predetermined direction corresponding to the correction value. This is preferably performed by the ink ejection correction control means of the ink jet recording apparatus.

  Preferably, first, the first landing position information and the second landing position information can be acquired by the landing position information acquisition means. The first landing position information is landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the recording head with respect to the recording medium at a first speed in the first direction. The second landing position information has the same magnitude as the first speed, and the recording medium moves while moving the recording head with respect to the recording medium at a second speed in the second direction opposite to the first direction. Is the landing position information of a plurality of inks ejected from the recording head. Then, the landing deviation amount is calculated by the landing deviation amount calculation means based on these, and the landing deviation amount caused only by the inclination of the ejection port array on the plane parallel to the opposite recording medium. Thus, the landing deviation amount caused only by the inclination of the discharge port array in the plane intersecting at right angles can be calculated. The landing deviation amount caused only by the inclination of the ejection port array on a plane parallel to the opposed recording medium is the main landing deviation amount. Further, the landing deviation amounts caused only by the inclination of the ejection port array in the plane perpendicular to the opposing recording medium are the first landing deviation amount and the second landing deviation amount. The first landing deviation amount is the landing deviation amount caused only by the inclination of the ejection port array in the plane perpendicular to the opposing recording medium, and is ejected while moving the recording head at the first speed. This is the amount of landing deviation regarding the ink that has been applied. The second landing deviation amount is the landing deviation amount caused only by the inclination of the ejection port array in the plane perpendicular to the opposite recording medium, and the recording head is moved at the second speed. This is the amount of landing deviation related to the discharged ink. Thereafter, the third landing position information can be calculated by the landing position information calculation means based on the main landing deviation amount, the first landing deviation amount, and the second landing deviation amount. The third landing position information is recorded on the recording medium while moving the recording head relative to the recording medium at a third speed in the third direction, which is the same direction as either the first direction or the second direction. The landing position information of a plurality of inks ejected from the ink. Preferably, the correction control means moves the recording head relative to the recording medium at a third speed in the third direction based on the third landing position information so as to suppress ink landing deviation. Then, the ink discharge control is corrected and controlled.

  The present invention acquires landing position information of a plurality of ejected inks while moving the recording head at a predetermined speed in a predetermined direction, and based on the acquired information, the recording head at the predetermined speed so as to suppress ink landing deviation. And a configuration for correcting and controlling ink ejection performed while moving the. Therefore, according to the present invention, it is possible to appropriately suppress ink landing deviation.

It is a figure for demonstrating the internal structure of the inkjet recording device which concerns on 1st Embodiment. FIG. 3 is a schematic diagram for explaining the arrangement of ejection ports in a recording head. It is a figure for demonstrating the control structure of the inkjet recording device of FIG. It is a figure for demonstrating the pattern for detecting the landing position shift of an ink. FIG. 5 is a diagram for explaining formation of the pattern of FIG. 4 on a recording medium. It is a graph showing the value read from the pattern of FIG. FIG. 6 is a diagram for explaining an ink landing position deviation when the ejection port array has a parallel in-plane inclination. FIG. 6 is a diagram for explaining an ink landing position deviation when an ejection port array has an in-plane inclination. It is a figure for demonstrating one correction method of the landing position shift of an ink. It is a figure for demonstrating one correction method of the landing position shift of an ink. It is a figure for demonstrating one correction method of the landing position shift of an ink. 6 is a flowchart illustrating a process of acquiring ink landing position information. FIG. 4 is a diagram for explaining an example of the inclination of the recording head according to the first embodiment. 3 is a flowchart illustrating an ink discharge control process according to the first embodiment. It is the figure which represented typically the line created using control of a 1st embodiment. It is the figure which represented typically the line created using control of a 1st embodiment. It is a graph showing the influence in the scanning direction of the in-plane inclination of the ejection port array. FIG. 18 is a diagram for explaining a model of the ejection port array of the recording head used for deriving the result of FIG. 17. It is the figure which represented typically the relationship between an inclination component and deviation | shift amount.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the first embodiment will be described.

  FIG. 1 is a perspective view of an inside or a mechanism portion of an ink jet recording apparatus (hereinafter referred to as a recording apparatus) 10 according to the first embodiment in a state where an exterior is removed.

  The recording apparatus 10 according to the first embodiment includes a paper feed unit 12, a paper feed unit 14, a paper discharge unit 16, and a carriage unit 18. The carriage unit 18 includes a recording head 20. By controlling these operations by a control unit, that is, a control device to be described later, the recording apparatus 10 can eject ink onto the recording medium P at a desired timing to form a desired image. As the recording medium P, paper, plastic, film or the like can be used.

  The paper feed unit 12 includes a paper feed roller and the like for feeding the recording medium P (not shown in FIG. 1) stacked on the pressure plate 22. The driving force to the paper feed roller is transmitted from a motor (hereinafter also referred to as “conveyance motor”) provided in the paper feed unit 12 by a drive transmission gear and a planetary gear.

  The paper feeding unit 14 includes a transport roller 26 that transports the recording medium P and a PE (Paper End) sensor (not shown). The transport roller 26 is in contact with a driven roller 28 that follows the transport roller 26. The recording medium P is sent between the transport roller 26 and the driven roller 28. The driven roller 28 urges the driven roller holder that holds the driven roller 28 by a driven roller spring, so that the driven roller 28 comes into pressure contact with the transport roller 26 to generate the transport force of the recording medium P. The recording position of the recording medium P can be set by detecting the leading end of the recording medium P that has been conveyed using a PE sensor. The driving force of the transport roller 26 is transmitted from the transport motor through a timing belt and a pulley.

  A carriage unit 18 is movably provided downstream of the conveyance roller 26 in the conveyance direction of the recording medium P, and a recording head 20 for forming an image based on image information is provided therein. As the recording head 20, an inkjet recording head is used in which a plurality of ink tanks (ink cartridges) 30 corresponding to the respective color inks can be individually replaced. Here, one recording head 20 is provided for five ink tanks 30. However, a recording head may be provided for each ink tank.

  The recording head 20 is configured so that heat can be applied to ink by an electrothermal transducer (heater). Then, the film of the ink is boiled by this heat, and the ink is ejected from the nozzles (ejection ports) of the recording head 20 using the pressure change caused by the growth or contraction of the bubbles in the ink. Can record images. The recording head 20 may be configured with other configurations, for example, an inkjet recording head that ejects ink using a piezo element.

  The carriage unit 18 includes a carriage 32 on which the recording head 20 can be mounted. The carriage 32 is guided by a guide shaft 34 and a guide rail 36 so as to be capable of reciprocating in the direction indicated by the arrow X (scanning direction). The scanning direction X is a direction intersecting (orthogonal in the present example) with respect to the direction (conveying direction) in which the recording medium P represented by the arrow Y is conveyed. The carriage 32 is driven by a carriage motor 38 via a timing belt or the like. In order to detect the position of the carriage 32, a code strip 40 with markings is provided in parallel to the timing belt, and a carriage substrate provided with an encoder sensor is mounted on the carriage 32. The mark on the code strip 40 is read by the encoder sensor. The recording head 20 can be fixed to the carriage 32 by turning the head set lever 42 and operating it.

  An optical sensor 33 is attached to the carriage 32 so as to optically read an image or pattern recorded on the recording medium P in order to adjust the landing position of the ink ejected from the recording head 20. The optical sensor 33 includes a light emitting LED and a light receiving sensor for receiving light emitted from the LED and reflected by the recording medium so that the amount of light reflected by the recording medium P can be detected. It has become. However, various sensors can be used as the optical sensor 33. The optical sensor 33 is used to acquire ink landing position information.

  In such a configuration, when an image is formed or recorded on the recording medium P, the recording medium P is first transported to the image forming position by the rollers 26 and 28. Then, ink is ejected from the recording head 20 while the carriage 32 is moved in the scanning direction X by the carriage motor 38.

  The paper discharge unit 16 includes a paper discharge roller 44 and the like. The paper discharge roller 44 and the like are configured to be driven by the rotational force of the transport roller 26 being transmitted. With such a configuration, the recording medium P on which an image is recorded by passing through the carriage unit 18 is conveyed so as to be sandwiched between the discharge rollers 44 and the like, and is discharged onto the discharge tray.

  In short, the recording head 20 and the ink cartridge 30 are detachably mounted on the carriage 32. The ink droplets land on the recording medium P by ejecting ink droplets from the ejection ports of the recording head 20 to the recording medium P while scanning the recording head 20 in the scanning direction X. On the other hand, the recording medium P is conveyed by a predetermined amount, for example, in a conveyance direction Y which is a direction orthogonal to the scanning direction X by a conveyance mechanism including the paper feeding unit 14. By combining the conveyance of the recording medium P in the conveyance direction, the scanning of the recording head 20 in the scanning direction, and the ejection of ink, various images can be recorded on the recording medium P. .

  FIG. 2 is a schematic diagram for explaining the arrangement of the plurality of ejection ports 50 in the recording head 20. In the recording head 20, a plurality of ejection ports 50 are arranged side by side for each ink cartridge 30. A group of the plurality of ejection openings 50 for each ink cartridge 30 is referred to as an ejection opening array 52. Here, since five ink cartridges 30 are provided, five ejection port arrays are provided in the recording head 20, and they are arranged side by side in the scanning direction X. However, in FIG. 2, only one arbitrary discharge port array 52 out of the five discharge port arrays is shown for the sake of simplicity. Each ejection port array 52 is designed to be parallel to the transport direction Y when the recording head 20 is attached to the carriage. In addition, the plurality of ejection ports 50 of each ejection port array 52 are arranged at an equal distance from the recording medium P that has been sent to a position opposed by the transport mechanism when the recording head 20 is attached to the carriage. Designed to be Here, one discharge port array 52 is composed of 1200 discharge ports 50 arranged in the transport direction Y at a 1200 dpi pitch. A discharge port (downstream end discharge port) 50d provided at the downstream end in the transport direction Y is defined as 0seg, and a discharge port (upstream end discharge port) 50u provided at the upstream end thereof is defined as 1199seg. However, each ejection port array can be divided into one or a plurality of groups for ink ejection control, and an ink ejection operation is enabled for each group.

  In the following, for ease of explanation, a description will be given with respect to one ejection port array 52 associated with one arbitrary cartridge 30. In addition, here, one discharge port array 52 is represented as a group of a plurality of discharge ports 50 arranged in a row, but is not limited to this, and for example, forms two or more parallel rows. A plurality of discharge ports 50 arranged in a row may be collected. Further, the length of the ejection port array may be different between different ejection port arrays.

  FIG. 3 is a block diagram showing the basic configuration of the control device in the recording apparatus 10 of the first embodiment. The CPU 60 executes a control program stored in the ROM 62. The RAM 64 is used as a work area when the CPU 60 performs control. A nonvolatile memory 66 is incorporated. The ASIC 68 controls the carriage motor 38 and the paper transport motor 74 via the motor drivers 70 and 72 under the control of the CPU 60 to perform the transport operation of the recording medium P and the scan of the recording head 20.

  When the recording head 20 reaches a position where ink should be ejected, the control device controls the ejection of ink from each ejection port 50 so that ink is ejected from the ejection port that should perform the ejection operation. As described above, ink is ejected from each ejection port 50 of the recording head 20 by the operation of an electrothermal converter, that is, a heater. The ejection port array 52 of the recording head 20 can be divided into one or a plurality of groups, and an ink ejection operation can be performed for each group. In order to enable such ink ejection operation, a heater driving circuit (heater driving circuit) is provided. In a heater driving circuit (not shown), a group is selected and set by inputting a selection signal to an AND circuit element for each heater. As will be apparent from the description below, a group (number of divisions) is set based on the inclination of the recording head 20 or the ejection port array 52, and a group selection signal corresponding to the set group is input to the circuit element. . In addition to this, a recording data signal formed based on image data (image information) to be recorded on the recording medium P is input to the circuit element. When the group selection signal is “1” and the recording data signal is “1”, the heater is activated. In the recording apparatus 10, ink droplets can be ejected simultaneously from all the ejection ports 50. Further, ink droplets can be ejected only from any one ejection port 50.

  By the way, it is known that when the recording head 20 is mounted so that the ejection port array 52 is inclined from a desired position, ink landing deviation occurs. The landing deviation of ink due to the inclination of the ejection port array 52 can be evaluated from the landing position relationship of a plurality of inks. Therefore, a method for obtaining information for making it possible to evaluate such a landing deviation of ink, that is, a method for obtaining landing position information of a plurality of inks will be described.

  FIG. 4 is a diagram illustrating a print pattern of the first embodiment, which is printed on the recording medium P in order to determine the landing deviation of ink. The print pattern is configured as a combination of patterns 80 as shown in FIG. Each pattern 80 is an image of horizontal 8 dots and vertical 300 dots with a 1200 dpi pitch as shown in FIG. 4B. In each of the block patterns 82, 84, 86, 88, and 90 in FIG. Patterns 80 are arranged in the scanning direction X at intervals of 8 dots. Each of these block patterns 82, 84, 86, 88, 90 includes a reference block pattern (reference block pattern) 82a, 84a, 86a, 88a, 90a. Also, each of these 82, 84, 86, 88, 90 includes block patterns (corresponding block patterns) 82b, 84b, 86b, 88b, 90b associated with each of these 82a, 84a, 86a, 88a. ing. However, in FIG. 4, the reference block pattern and the corresponding block pattern are shown shifted in the transport direction Y, but the reference block pattern and the corresponding block pattern are formed so as to overlap without being shifted in the transport direction Y. The With respect to each reference block pattern, each corresponding block pattern is formed so as to be shifted by a predetermined amount in the scanning direction X to plus or minus. More specifically, first, the corresponding block pattern 82b is shifted by −4 dots from the reference block pattern 82a in the scanning direction X. The corresponding block pattern 84b is shifted by −2 dots from the reference block pattern 84a in the scanning direction X. The corresponding block pattern 88b is shifted by +2 dots from the reference block pattern 88a in the scanning direction X. Then, the corresponding block pattern 90b is shifted by +4 dots from the reference block pattern 90a in the scanning direction X. The corresponding block pattern 86b is not intentionally shifted from the reference block pattern 86a, but is formed so as to overlap therewith.

  Further, the formation of the print pattern described with reference to FIG. 4 will be further described with reference to FIG. The recording head 20 has an ejection port array 52 composed of 1200 ejection ports 50 arranged in a row as described above. In the pattern printing of FIG. 4, 300 (total 600) ejection ports 50 at both ends of the 1200 ejection port arrays 52 are used. A group of 300 discharge ports 50 at the upstream end with respect to the conveyance direction Y of the recording medium P is referred to as an upstream group 54u, and a group of 300 discharge ports 50 at the downstream end is defined as a downstream group. 54d.

  In the discharge port array 52 shown in FIG. 5, the upstream end discharge port 50 u and the downstream end discharge port 50 d are shifted by 40 μm in the scanning direction X. That is, the recording head 20 is attached to be inclined with respect to the transport direction Y. First, the reference block patterns 82a, 84a, 86a, 88a, and 90a are formed on the recording medium P by the 300 ejection ports 50 of the upstream group 54u while scanning the recording head 20 in the positive scanning direction X +. . Thereafter, the recording head 20 is returned to the original state. On the other hand, the recording medium P is transported by a predetermined amount so that the corresponding block pattern can be formed by ejecting ink from the 300 ejection ports 50 of the downstream side group 54d so as to overlap the reference block patterns as described above. . A corresponding block pattern is formed on the reference block pattern from 300 discharge ports 50 of the downstream group 54d while scanning the recording head 20 in the positive scanning direction X + with the recording medium P being conveyed by a predetermined amount. Ink is discharged. As described above, the corresponding block pattern is formed so as to overlap the reference block pattern so as to be shifted by a predetermined amount with respect to the reference block pattern. Finally, all five block patterns 82, 84, 86, 88, 90 surrounded by dotted lines are formed. Each of the five block patterns in FIG. 5 is detected by the optical sensor 33, and an output value is obtained. The result of the output value is shown in FIG. The output value tends to increase as the ink density increases. In FIG. 6, the vertical axis represents the output value (the larger the upper part in FIG. 6), and the horizontal axis represents the value corresponding to each block pattern. Specifically, the horizontal axis of FIG. 6 represents the target shift amount (unit: dot) of the corresponding block pattern from the reference block pattern in each block pattern. In FIG. 6, since the output value from the block pattern 84 with the target deviation amount of −2 dots is the highest (the two patterns overlap), the downstream group 54d is in the scanning direction X with respect to the upstream group 54u. It can be seen that +2 dots (about 40 μm) are shifted. As described above, it is possible to acquire the landing position information of a plurality of inks using the optical sensor 33, specifically, the amount of landing deviation of ink caused by the inclination of the ejection port array 52.

  However, in the above example, the ejection port array 52 is inclined only on a plane parallel to the opposed recording medium P. However, the inclination of the ejection port array 52 is as described below. It's not just a tilt. Therefore, for ink ejection control, such a process is performed for each scanning speed that is the moving speed of the recording head 20, for example, for each positive and negative scanning speed (for each different scanning direction).

  Here, as described above, the landing position information of a plurality of inks can be acquired using the ink density in the pattern formed on the recording medium P. However, different methods may be employed for obtaining such information. However, the landing position information to be acquired is not limited to the ink landing deviation amount itself, but includes various data and values corresponding to the ink landing deviation amount, data and values that are affected by the inclination of the ejection port array 52, and the like. It may be information. For example, the landing position information to be acquired can be an output value or a detection value as shown in FIG.

  Here, the inclination of the ejection port array 52 of the recording head 20 will be described with reference to FIGS. However, in order to make the description easier, in the following description, one discharge port array 52 is composed of only ten discharge ports 50 arranged in series.

  The inclination of the ejection port array 52 can be decomposed into two kinds of inclinations (inclination components), and ink landing deviation may occur due to these inclinations. In other words, the cause of ink landing deviation is two types of inclination of the ejection port array. One of the two types of inclination is an inclination (hereinafter referred to as parallel in-plane inclination) IP of the ejection port array on a plane parallel to the opposed recording medium. The other is an ejection port array inclination (hereinafter referred to as an in-plane inclination) IC in a plane that intersects at right angles to the opposite recording medium. When the intersecting in-plane inclination IC is in the ejection port array 52, the interval between the upstream end ejection port 50u and the recording medium P in the ejection port array 52 (upstream side spacing), and the downstream end ejection in the ejection port array 52 The distance between the outlet 50d and the recording medium P (the downstream distance) is different.

  In FIG. 7A, neither the in-plane inclination IP nor the in-plane inclination IC occurs, and the ejection port array 52 is positioned in a plane parallel to the recording medium P so as to be aligned in the transport direction Y. 2 is a schematic diagram of a recording head 20. FIG. FIG. 7B is a diagram of a line 100 of 1 dot width recorded on the recording medium P while scanning the recording head 20 of FIG. 7A in the scanning direction X +. Thus, when the recording head 20 is properly positioned and the ejection port arrays 52 are arranged in parallel to the conveyance direction Y of the recording medium P, the line 100 is parallel to the conveyance direction Y, so-called landing deviation. Does not occur.

  In such a case, as shown in FIG. 7C, the recording head 20 is inclined with respect to the conveyance direction Y of the recording medium P in a plane parallel to the opposing recording medium P. Consider the case where it is attached. The recording head 20 in FIG. 7C is inclined so that the downstream discharge port 50d is displaced by a distance A from the upstream discharge port 50u in the scanning direction X +. FIG. 7D shows a line 102 having a width of 1 dot obtained by ejecting ink onto the recording medium P while scanning the recording head 20 in the state of FIG. 7C in the scanning direction X +. FIG. FIG. 7E shows a line 104 having a width of 1 dot obtained by ejecting ink while scanning the recording head 20 in the scanning direction X− opposite to that in FIG. FIG. As is clear from these figures, both the line 102 and the line 104 have an inclination that matches the inclination of the ejection port array 102 shown in FIG. Thus, the landing deviation caused only by the parallel in-plane inclination IP of the ejection port array 52 does not change depending on the scanning direction of the recording head 20.

  Next, the in-plane inclination IC will be described with reference to FIG. FIG. 8A shows a schematic view of the recording head 20 and the ejection port array 52 shown in FIG. Therefore, the line 106 in FIG. 8B obtained by ejecting ink from the recording head 20 in FIG. 8A while scanning in the scanning direction X + is parallel to the transport direction Y. Further, a line 108 in FIG. 8C obtained by scanning the recording head 20 in FIG. 8A in the scanning direction X− and discharging ink therefrom is also parallel to the transport direction Y. That is, in this case, landing deviation due to the scanning direction of the recording head 20 does not occur.

  In contrast to such a case, consider a case where only the in-plane inclination IC is generated in the recording head 20, as shown in FIG. As apparent from FIG. 8D, in the transport direction Y of the recording medium P, the upstream end ejection port 50u is separated by a distance B from the opposed recording medium P rather than the downstream end ejection port 50d. ing.

  When the recording head 20 in the state shown in FIG. 8D is scanned in the scanning direction X + and ink is then ejected, a one-dot line 110 is formed, as shown in FIG. 8E. Become a line. On the other hand, when the recording head 20 in the state shown in FIG. 8D is scanned in the scanning direction X− while ejecting ink, a 1-dot line 112 is formed, and the line 112 is changed to FIG. It becomes a line as shown in. As described above, when the recording head 20 has the in-plane inclination IC, the formed lines have different inclinations due to different scanning directions, that is, different scanning speeds. Note that since the ejection port array 52 of the recording head 20 in FIG. 8D has only the in-plane inclination IC, the inclinations of the lines 110 and 112 are the same. That is, the amount of deviation in the scanning direction X of the dot 110u formed of ink from the upstream end discharge port 50u and the dot 110d formed of ink from the downstream end discharge port 50d is the same as that of the same dot 112u and dot 112d. The shift amount in the direction X is the same shift amount C.

  Here, the reason why such landing deviation occurs will be described with reference to FIG. When the ink droplet 114 is ejected from the upstream end ejection port 50u while moving the recording head 20 in the scanning direction X +, two types of forces act on the ejected ink droplet 114. These are a speed vector 116 corresponding to the scanning speed and a speed vector 118 corresponding to the ejection speed of the ink droplet 114, as indicated by vectors. That is, a velocity vector 120 obtained by synthesizing these velocity vectors 116 and 118 acts on the ink droplet 114. As a result, the ink droplet 114 ejected from the upstream end ejection port 50u having the widest gap with the recording medium P is located at a position away from the lower position of the ejection port 50u at the timing when the ink droplet 114 is ejected by a distance D. Land. On the other hand, the same force also acts on the ink droplets 122 ejected from the ejection port 50d having the narrowest gap with the recording medium P. However, since the downstream end ejection port 50d is closer to the recording medium P than the upstream end ejection port 50u, the ink droplet 122 is located at a position E away from the position below the ejection port 50d when the ink droplet 122 is ejected. Although landing, the distance E is shorter than the distance D. Therefore, the line formed by the ink ejected from the recording head 20 in FIG. 8D during scanning is inclined as shown in FIGS. 8E and 8F.

  When the scanning direction, that is, the positive / negative of the scanning speed is changed, the direction of the force acting on the ink droplet is also reversed. Therefore, as shown in FIGS. 8E and 8F, the slope of the line formed by the ink ejected from the recording head 20 in FIG. 8D also changes.

  As described above, depending on whether the inclination of the ejection port array 52 of the recording head 20 is the in-plane inclination IP, the in-plane inclination IC, or a combined inclination of both, The deviation tendency of the ink landing position is different. Therefore, correction control considering these is required.

  On the other hand, it is conceivable to divide the ejection port array 52 of the recording head 20 into a plurality of groups and to simply shift the timing of ejecting ink for each group so as to suppress such landing position deviation. Such a case will be described with reference to FIGS.

  First, the case where the recording head 20 has only the in-plane inclination IP as described with reference to FIG. 7 will be described. Here, a case is considered in which the deviation (“A” in FIG. 7) in the scanning direction X between the upstream end discharge port 50u and the downstream end discharge port 50d is 40 μm. In this case, if a line having a width of 1 dot and a length of 20 dots is simply recorded on the recording medium P by reciprocating the recording head 20 in one pass, as shown in FIG. Will occur.

  Therefore, in order to suppress such landing deviation, one ejection port array 52 is divided into a plurality of groups, and ink is ejected from the ejection ports for each group. This will be described with reference to FIG. 9B and FIG.

  In the recording head 20 of FIG. 10A, ten ejection ports 50 are aligned at a 1200 dpi pitch. The discharge port array formed by them has only a parallel in-plane inclination IP, and there is a deviation of 40 μm between the upstream end discharge port 50u and the downstream end discharge port 50d. 10B, the portion 132 of the image data 130 is a portion where the recording data (signal) is “1”, and the other portion 134 has the recording data (signal) “ This is the portion that becomes “0”. That is, here, the image data is a line having a width of 1 dot. When ink is ejected at the same time from all the ejection ports 50 of the ejection port array 52 while scanning the recording head 20 in the scanning direction X +, the inclination coincides with the inclination of the ejection port array 52 as shown in FIG. As described above, a line having a line is drawn.

  Therefore, based on the landing deviation amount such as 40 μm obtained by the detection as described above, the discharge port arrays 52 are divided into two groups here. First, at the timing when the downstream end ejection port 50d reaches the position corresponding to the portion 132 of the image data 130, ink is ejected only from the ejection ports of one group (in this case, the downstream group) (FIG. 10D). See black circle). Next, at the timing when the recording head 20 scans one pixel in the scanning direction X + side, ink is ejected only from the ejection ports of the other group (in this case, the upstream group) (see FIG. 10E).

  The ink ejection control including such grouping is similarly applied to the case where the recording head 20 is scanned in the X-direction. However, the order of ink ejection from the upstream group ejection ports and ink ejection from the downstream group ejection ports differs depending on the scanning direction. By performing such correction control, as shown in FIG. 9B, the ink landing deviation amount can be halved to 21 μm, which is about half, and the quality of the ruled line can be improved.

  Next, the case where the recording head 20 has only the in-plane inclination CP as described with reference to FIG. 8 will be described with reference to FIG. Specifically, the difference B between the upstream space and the downstream space is 0.4 mm, the scanning speed of the recording head 20 is 40 inches / s, the ink discharge speed from the discharge port is 12 m / s, and the width is 1 pass. A line of 20 pixels of 1 dot is recorded back and forth. Then, as shown in FIG. 11A, the printed line has a maximum width of 34 μm. On the other hand, when ink ejection control with correction as described with reference to FIGS. 9 and 10 is performed, landing deviation is not detected in printing related to scanning in the X + direction as shown in FIG. 11B. Cannot improve. Further, when the scanning speed is set to 25 inches / s, even if such control is not performed, the force acting on the ink becomes small as shown in FIG. However, as in the case shown in FIG. 11B, when such control is performed, the landing deviation cannot be improved as shown in FIG. 11D.

  Therefore, it is understood that when there is an undesired in-plane inclination IC in the ejection port array 52, different corrections need to be applied depending on whether the scanning speed is positive or negative, that is, the scanning direction, and the scanning speed.

  Therefore, in ink ejection control, first, a control device (for example, CPU) ejects from the recording head 20 to the recording medium P while moving the recording head 20 relative to the recording medium P at a predetermined speed in a predetermined direction. The landing position information of the plurality of inks obtained is acquired. This corresponds to acquiring information affected by the inclination of the ejection port array 52. Next, based on this, the control device calculates a correction value corresponding to the predetermined speed of the recording head 20. Then, the control device uses the calculated correction value to perform correction control of ink ejection performed while moving the recording head 20 with respect to the recording medium P at a predetermined speed in a predetermined direction corresponding to the correction value. To do. This is applied for each moving direction and moving speed of the recording head. A part of the control device constitutes a part of the acquisition unit, and another part constitutes a correction control unit. The correction value calculation means and the ink ejection correction control means are each constituted by a part of the control device.

  Hereinafter, the ink ejection correction control will be described more specifically. Here, first, landing position information in the positive scanning direction X + (forward direction) and landing position information in the negative scanning direction X− (reverse direction) are detected at each of the two types of movement speeds. (Acquired). This will be described based on the flowchart of FIG.

  In the recording apparatus 10 of the first embodiment, two types of speeds, 25 ips and 40 ips, are employed. First, the speed is set to 25 ips in step S101. In step S103, the direction is set to the forward direction. These correspond to setting the scanning speed of the recording head 20 to +25 ips. Next, in step S105, a printing pattern as described with reference to FIGS. 4 and 5 is printed on the test recording medium P, and in step S107, the characteristics of the printing pattern, that is, as described with reference to FIG. Information is detected. The detection of such information is to detect the amount of landing deviation (or the amount of inclination) from the target position of the ink that has landed on the recording medium P, and a plurality of information ejected from the ejection ports 50 of the ejection port array 52. This substantially corresponds to acquisition of ink landing position information. Then, the ink landing deviation amount is calculated by searching for data stored in the ROM or the like obtained in advance based on experiments or the like using such detection values, or by performing a predetermined calculation. The The calculated value is stored (stored) in the non-volatile memory 66 in step S109 as landing position information here.

  Next, in step S111, it is determined whether or not the steps from step S105 to step S109 have been completed in all directions with respect to the speed of 25 ips. Here, a negative determination is made because these steps are not completed with respect to the backward direction at a speed of 25 ips. If a negative determination is made in step S111, step S103 is executed.

  In step S103, which is executed when the result in step S111 is negative, the backward direction, which is the remaining direction, is set as the direction. This corresponds to setting the scanning speed of the recording head 20 to −25 ips. Then, Step S105 to Step S109 are executed with respect to the scanning speed of −25 ips. In step S111 thus reached, affirmative determination is made because steps S105 to S109 are executed in both the forward direction and the backward direction at a speed of 25 ips.

  Next, in step S113, it is determined whether or not steps S105 to S109 have been executed for all scanning speeds, that is, all speeds and all directions. Here, since those steps are not executed for the speed of 40 ips, a negative determination is made. If a negative determination is made in step S113, step S101 is executed.

  As described above, according to the flowchart of FIG. 12, steps S105 to S109 are executed for the entire scanning speed (+25 ips, −25 ips, +40 ips, −40 ips) of the recording head 20. Then, by making an affirmative determination in step S113, the sequence for obtaining the landing position information ends.

  Here, as shown in FIG. 13, a case where the recording head 20 is mounted inclined will be described. In this case, the ejection port array 52 is inclined with respect to the transport direction of the recording medium P (the upstream end ejection port 50u is in the forward direction X + of the scanning direction X of the recording head 20 with respect to the downstream end ejection port 50d. 40 μm off.) In this case, the difference between the upstream space and the downstream space is 0.2 mm (the upstream space is 0.2 mm wider than the downstream space). Further, the discharge port array 52 is as described with reference to FIG. Table 1 shows a calculation example of the landing position information (here, the landing deviation amount or the inclination amount) that must be obtained in accordance with the flowchart of FIG. The calculation was performed assuming that the ejection speed of the ink droplets from each ejection port 50 was 12 m / s. However, on the basis of the dots formed by the ink discharged from the downstream end discharge port 50d, the landing deviation amount of the dots generated by the ink discharged from the upstream end discharge port 50u is expressed as “+” for the forward direction and “−” for the reverse direction. ing.

  Further, Table 2 shows correction values calculated by the first embodiment under the conditions in Table 1. The unit is 1/2400 dpi (about 10 μm). The correction value is set in advance by searching data stored in advance in the ROM or the like based on the various landing position information (for example, the output value or the value in Table 1). It is calculated by performing a calculation using a predetermined calculation formula.

  Ink ejection correction control is executed using the correction value obtained for each scanning speed of the recording head 20 in this manner. However, in the first embodiment, correction in units of 1200 dpi is performed. These correction values are stored for use until the recording head 20 is removed from the carriage 32 and the same or another recording head 20 is attached to the carriage 32. However, the acquisition of the landing position information and the calculation of the correction value may be executed every time the power of the recording apparatus 10 is turned on or when the operation period of the recording apparatus 10 exceeds a predetermined time.

  FIG. 14 shows a flowchart of ink discharge correction control. In step S201, the mode (number of passes, moving speed of the recording head 20, etc.) is determined. In step S203, the direction (forward direction, backward direction) is determined. In step S205, a correction value corresponding to the scanning speed (speed and direction) is acquired (calculated (read)). Ink is ejected from each ejection port 50 while performing correction using the correction value acquired in step S207. If all the recordings are not finished in step S209, step S203 is executed, and if not, the process is finished.

  FIG. 15 shows a line having a width of 1 dot and a length of 2400 dots printed with the moving speed of the recording head 20 being 40 inches / s and performing the ink ejection correction control using the correction value. In recording while the recording head 20 is scanned in the forward direction, which is the X + direction, three-division inclination correction corresponding to the correction value +6 is applied (the discharge port array 52 is divided into three groups). On the other hand, in printing while scanning in the backward direction which is the −X direction, one-division correction corresponding to the correction value +2 is applied (the discharge port array 52 is divided into one group). In the ejection of ink in the forward direction, if such correction is not performed, a maximum landing deviation of 60 μm (“F” in FIG. 15) occurs. On the other hand, the amount of landing deviation can be suppressed to a maximum of 22 μm (“G” in FIG. 15) by such correction control.

  FIG. 16 shows a line having a width of 1 dot and a length of 2400 dots, recorded while performing the ink ejection correction control using the correction value with the moving speed of the recording head being 25 inches / s. In recording while the recording head 20 is scanned in the forward direction, which is the + X direction, inclination correction of three divisions corresponding to the correction value +5 is applied (the discharge port array 52 is divided into three groups). On the other hand, in printing while scanning in the backward direction, which is the −X direction, two-division inclination correction corresponding to the correction value +3 is applied (the discharge port array 52 is divided into two groups). . If such correction is not performed, landing deviation of up to 51 μm (“H” in FIG. 16) and up to 29 μm in the backward direction occur in recording in the forward direction. On the other hand, when such correction using the correction value is applied, the landing deviation amount can be suppressed to a maximum of 25 μm in the forward direction (“I” in FIG. 16) and to a maximum of 21 μm in the reverse direction. Become.

  As described above, here, when ink is ejected while reciprocating the recording head 20, landing position information at the speed in the forward direction and landing position information at the speed in the backward direction are first acquired. The In other words, the first landing position information related to the ejected ink is acquired while moving the recording head 20 with respect to the recording medium P at the first speed in the first direction (for example, +40 ips). Also, second landing position information about the ink ejected while moving the recording head 20 at a second speed (for example, −40 ips) in the second direction opposite to the first direction with respect to the recording medium P is acquired. Is done. Next, a first correction value (for example, +6) corresponding to the first velocity is calculated based on the first landing position information, and a second correction value (corresponding to the second velocity based on the second landing position information) ( For example, +2) is calculated. Then, the ejection control of the ink performed while moving the recording head 20 relative to the recording medium P at the first speed using the first correction value is corrected and controlled, and the recording head is moved at the second speed using the second correction value. Ink ejection performed while moving the recording medium is corrected and controlled. By doing so, it is possible to appropriately suppress ink landing deviation.

  Next, a second embodiment according to the present invention will be described. The second embodiment is different from the first embodiment regarding acquisition of landing position information. Other than that, it is almost the same. Therefore, the following mainly describes the differences and the related matters. In the following, constituent elements corresponding to the constituent elements that have already been described are assigned the same reference numerals, and redundant description thereof will be omitted.

  The second embodiment differs from the first embodiment in that the amount of landing deviation due to only the parallel in-plane inclination IP and the amount of landing deviation due to only the in-plane inclination IC at a specific moving speed of the recording head 20 are obtained. The point is that the correction control as described above is performed using these values, which are held in a memory or the like. For this purpose, a part of the control device constitutes a landing position information acquisition unit, another part constitutes a landing deviation amount calculation unit, and another part stores the calculated landing deviation amount in a memory or the like. Storage means for storing the information in the storage device, and another part of the storage device constitutes landing position information calculation means.

  The parallel in-plane inclination IP similarly affects the ink landing position regardless of the scanning speed. On the other hand, the in-plane inclination IC has different influences on the ink landing position depending on the moving speed and moving direction of the recording head. The speed dependence of the amount of landing deviation due to the in-plane inclination IC was calculated for each direction. The result is shown in FIG. The recording head 20 of the model used for the calculation has only the in-plane inclination IC as shown in FIG. The ink droplet ejection speed was 12 m / s. However, in FIG. 17, the dot landing deviation amount (inclination amount) due to the ink ejected from the upstream end ejection port 50u is set to “+” in the forward direction with reference to the dot due to the ink ejected from the downstream end ejection port 50d. The backward direction is represented as “−”. This notation and the like is similarly applied to other descriptions below.

  From the graph of FIG. 17, it can be seen that the amount of deviation due to the in-plane inclination IC is proportional to the scanning speed of the recording head. Further, it can be seen from FIG. 17 that the tendency of landing deviation in the forward direction and the tendency of landing deviation in the backward direction have symmetry. Thus, it is not necessary to actually detect such information for all scanning speeds of the printhead, and by obtaining such information for one moving speed in both directions, information at other moving speeds ( For example, it is possible to estimate (calculate) landing position information). This results in shortening the acquisition time of such information.

  A method of obtaining the landing deviation amount due to the in-plane inclination IP and the landing deviation amount due to the in-plane inclination IC will be described with reference to FIG. However, the inclination of the ejection port array 52 of the recording head 20 is as described with reference to FIG. 13. In this configuration, the magnitude of the ink ejection speed is assumed to be constant. A line L1 in FIG. 19A is a line formed by ink ejected while moving the recording head 20 in the forward direction, that is, while scanning in the scanning direction X +. A line L2 in FIG. 19B is a line formed by ink ejected while scanning the recording head 20 in the scanning direction X-.

  First, landing position information in the forward direction and the backward direction is acquired at a specific moving speed (here, 25 inches / s). Here, a landing deviation amount is detected. The landing deviation amount in the forward direction is D1, and the landing deviation amount in the backward direction is D2. The amount of landing deviation obtained here is affected by both the deviation due to the parallel in-plane inclination IP and the deviation due to the in-plane inclination IC. The forward landing deviation amount X1 and the backward landing deviation amount X2 caused only by the in-plane inclination IC have a relationship of Expression (1) and Expression (2), respectively.

  Further, the landing deviation amount (main landing deviation amount) Z caused only by the parallel in-plane inclination IP has a relationship of Expression (3) and Expression (4) (see FIG. 18C).

  Based on these relationships, the landing deviation amounts X1, X2, and Z when the speed is 25 ips are calculated as shown in the following equations (5) to (7).

  The amount of landing deviation due to only the in-plane inclination IP is 40 μm, and the amount of landing deviation due to only the in-plane inclination IC is 11 μm in the forward direction X + and −11 μm in the backward direction X−. These landing deviation amounts are stored in a memory or the like, and necessary landing position information is obtained by using them each time control is performed in the first embodiment. Then, correction control as described in the first embodiment is executed.

  When the landing deviation amount for the scanning speeds +25 ips and −25 ips, that is, the landing position information is calculated from the X1, X2, and Z landing deviation amounts, the forward landing deviation amount is 51 (= 40 + 11) μm, and the backward landing deviation amount is 29 (= 40-11) μm. In this way, it is possible to reproduce the amount of landing deviation in the reciprocation.

  Further, the landing deviation amount when the scanning speed is +40 inch / s and −40 inch / s can be calculated from X1, X2, and Z when the scanning speed is +25 inch / s and −25 inch / s. Specifically, the landing deviation amount in the forward direction is 58 (= 40 + 11 × 40/25) μm, and the landing deviation amount in the backward direction is 22 (= 40−11 × 40/25) μm. This is consistent with the amount of deviation in Table 1.

  Based on these, by performing ink ejection correction control as in the first embodiment, the same effects as those described in the first embodiment can be obtained.

  As described above, here, first, the recording head with respect to the recording medium P is first moved while moving the recording head 20 with respect to the recording medium P at the first speed in the first direction (+25 ips in the above description). First landing position information of the ink ejected from 20 is acquired. In addition, the recording head 20 is moved with respect to the recording medium P at the second speed (−25 ips in the above description) in the second direction opposite to the first direction and having the same magnitude as the first speed. The second landing position information of the ink ejected from the recording head 20 is acquired. The main landing deviation amount Z caused only by the parallel in-plane inclination IP at these moving speeds (25 ips in the above description), the first landing deviation amount X1 in the first direction caused only by the in-plane inclination IC, and A second landing deviation amount X2 in the second direction is calculated and stored. The first landing deviation amount is an amount relating to ink ejected while moving the recording head at the first speed, and the second landing deviation amount is an amount relating to ink ejected while moving the recording head at the second speed. is there. When ink is ejected while moving the recording head 20 at the first speed or the second speed, the first landing position information and the second landing position information are stored using the stored landing deviation amounts Z, X1, and X2. To be acquired. As a result, as described in the first embodiment, it is possible to perform ink ejection correction control. The acquisition of the first landing position information or the second landing position information using these landing deviation amounts Z, X1, and X2 corresponds to the acquisition of the third landing position information corresponding to the third speed in the third direction. To do.

  On the other hand, when ink is ejected from the recording head 20 while moving the recording head 20 at different moving speeds, landing position information at different speeds is acquired using the stored landing deviation amounts Z, X1, and X2. Is done. Specifically, based on these landing deviation amounts Z, X1, and X2, the first ′ landing position information at the first ′ velocity in the first direction (+40 ips in the above description) and the second ′ ′ further in the second direction. Second ′ landing position information at the speed (−40 ips in the above description) is calculated. Then, a first 'correction value corresponding to the first' speed is based on the first 'landing position information, and a second' correction value corresponding to the second 'speed is based on the second' landing position information. Calculated. Accordingly, it is possible to correct and control ink ejection while using the first ′ correction value and the second ′ correction value according to the moving speed of the recording head. The first 'speed and the second' speed correspond to the third speed in the third direction, and the first 'landing position information and the second' landing position information correspond to the third landing position information. The first 'correction value and the second' correction value correspond to the third correction value.

  When ink is discharged from the discharge port only when the control device 10 moves the recording head in one direction, one landing at a predetermined speed in the one direction using the landing deviation amounts Z, X1, and X2. The position information may be calculated. In this case, only a correction value at a predetermined speed in one direction is obtained. Ink ejection performed while moving the recording head at the predetermined speed can be corrected and controlled using the correction value.

  It should be noted that a configuration and method for acquiring landing position information of a plurality of inks, a configuration and method for calculating correction values, a configuration and method for correction control, and the like adopted in both the above embodiments. Each may have other configurations and methods. Also, the composite type of both the above embodiments is allowed in the present invention.

  As mentioned above, although this invention was demonstrated based on embodiment etc., this invention is not limited to these. The present invention includes all modifications, applications, and equivalents included in the spirit of the present invention defined by the claims.

DESCRIPTION OF SYMBOLS 10 Inkjet recording device 20 Recording head 32 Carriage 50 Ejection port 52 Ejection port row P Recording medium

Claims (6)

An inkjet recording apparatus that performs recording on the recording medium by ejecting ink from the recording head while moving a recording head having an ejection port array in which a plurality of ejection ports are arranged with respect to the recording medium,
Acquisition means for acquiring landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the recording head with respect to the recording medium at a predetermined speed in a predetermined direction;
Ink performed while moving the recording head with respect to the recording medium at the predetermined speed in the predetermined direction based on the landing position information acquired by the acquisition means so as to suppress ink landing deviation. An ink jet recording apparatus comprising: correction control means for correcting and controlling the discharge of the ink. The correction control means includes
Correction value calculation means for calculating a correction value corresponding to the predetermined speed in the predetermined direction based on the landing position information acquired by the acquisition means so as to suppress ink landing deviation;
Using the correction value calculated by the correction value calculation means, the ink ejection performed while moving the recording head relative to the recording medium at the predetermined speed in the predetermined direction corresponding to the correction value is corrected. The inkjet recording apparatus according to claim 1, further comprising an ink discharge correction control unit that controls the inkjet recording apparatus. The acquisition means includes
First landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the recording head with respect to the recording medium at a first speed in a first direction; and The recording head is moved relative to the recording medium at a second speed in the second direction opposite to the first direction and having the same magnitude as the first speed. Landing position information acquisition means for acquiring second landing position information of a plurality of inks ejected from the recording head;
Based on the first landing position information and the second landing position information, the main landing deviation amount caused only by the inclination of the ejection port array on the plane parallel to the opposed recording medium, A first landing deviation amount caused only by the inclination of the ejection port array in a plane perpendicular to the recording medium, the first ink relating to the ink ejected while moving the recording head at the first speed. The amount of landing deviation and the amount of second landing deviation caused only by the inclination of the ejection port array in the plane perpendicular to the recording medium facing each other, and the recording head is moved at the second speed. A landing deviation amount calculating means for calculating a second landing deviation amount relating to the ejected ink,
Based on the main landing deviation amount, the first landing deviation amount, and the second landing deviation amount, the recording is performed at a third speed in a third direction that is the same direction as either the first direction or the second direction. Landing position information calculating means for calculating third landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the head with respect to the recording medium;
With
The correction control means moves the recording head relative to the recording medium at the third speed in the third direction based on the third landing position information so as to suppress ink landing deviation. The ink jet recording apparatus according to claim 1, wherein the discharge control of the ink is performed with correction control. An inkjet recording method for performing recording on the recording medium by ejecting ink from the recording head while moving a recording head having an ejection port array in which a plurality of ejection ports are arranged with respect to the recording medium,
An acquisition step of acquiring landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the recording head with respect to the recording medium at a predetermined speed in a predetermined direction;
Correction for correcting and controlling ejection of ink while moving the recording head relative to the recording medium at the predetermined speed in the predetermined direction based on the landing position information so as to suppress ink landing deviation. An inkjet recording method comprising: a control step. The correction control step includes
A correction value calculating step for calculating a correction value corresponding to the predetermined speed in the predetermined direction based on the landing position information so as to suppress ink landing deviation;
An ink discharge correction control step for correcting and controlling ink discharge using the correction value while moving the recording head with respect to the recording medium at the predetermined speed in the predetermined direction corresponding to the correction value; The inkjet recording method according to claim 4, comprising: The obtaining step includes
First landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the recording head with respect to the recording medium at a first speed in a first direction; and The recording head is moved relative to the recording medium at a second speed in the second direction opposite to the first direction and having the same magnitude as the first speed. A landing position information acquisition step of acquiring second landing position information of a plurality of inks ejected from the recording head;
Based on the first landing position information and the second landing position information, the main landing deviation amount caused only by the inclination of the ejection port array on the plane parallel to the opposed recording medium, A first landing deviation amount caused only by the inclination of the ejection port array in a plane perpendicular to the recording medium, the first ink relating to the ink ejected while moving the recording head at the first speed. The amount of landing deviation and the amount of second landing deviation caused only by the inclination of the ejection port array in the plane perpendicular to the recording medium facing each other, and the recording head is moved at the second speed. A landing deviation amount calculating step for calculating a second landing deviation amount relating to the ink ejected while the
Based on the main landing deviation amount, the first landing deviation amount, and the second landing deviation amount, the recording is performed at a third speed in a third direction that is the same direction as either the first direction or the second direction. A landing position information calculating step of calculating third landing position information of a plurality of inks ejected from the recording head with respect to the recording medium while moving the head with respect to the recording medium;
With
In the correction control step, the recording head is moved relative to the recording medium at the third speed in the third direction based on the third landing position information so as to suppress ink landing deviation. 6. The ink jet recording method according to claim 4, wherein the ejection of the ink performed while being corrected is controlled.

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