JP2010184442A - Recording device and recording control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device which flexibly changes the feeding amount of paper and the number of nozzles used, and reduces the number of times of unnecessary scanning. <P>SOLUTION: The recording device has a recording head having a first nozzle row discharging high-permeability ink and a second nozzle row having the length twice as long as the length of the first nozzle row and discharging low-permeability ink, and decides the availability of recording data by the high-permeability ink in recording data used in a subsequent area to be scanned by the first nozzle row. When deciding that the data are not available, the recording device decides the availability of recording data in which the recording position by the high-permeability ink in recording data used for an area to be scanned which is further dislocated from the subsequent area to be scanned by the length of the first nozzle row and the recording position by the low permeability ink coincide on a pixel basis. The recording device controls the recording mediums so as to transfer them by the length of the second nozzle row when deciding that the data are not available, and transfer them by the length of the first nozzle row when deciding that the data are available. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus that performs recording on a recording medium.

  In recent years, a system for printing image data on a recording medium using both a low penetrability black ink and a high penetrability black ink has been developed. In general, the low penetrability black inks used in such systems are pigment-based inks and the high penetrability black inks are dye-based inks. A low penetrability black ink has a higher optical density than a high penetrability black ink and is therefore suitable for printing text or a wide black area. On the contrary, the highly penetrating black ink has an optical density similar to that of the highly penetrating color ink, and is therefore suitable for printing the color region of the image.

  However, the high penetrability and low penetrability black inks used to print images have different optical densities. Therefore, images printed using inks having different ink permeability often appear discontinuous or appear uneven. In order to solve such a problem, there is a print control method that alleviates the above-mentioned discontinuity and non-uniformity of the image by changing the number of nozzles used and the position of the low permeability black ink and the high permeability color ink. It is disclosed.

  In Patent Document 1, the recording area is recorded with all the recording data to be recorded by performing a plurality of main recording scans using a plurality of different nozzle groups, thereby completing an image. A printing device is described. Patent Document 2 describes a recording apparatus that prevents image deterioration by providing a printing time difference between a low penetrability black ink and a high penetrability color ink.

JP 2002-166536 A JP 2004-188759 A

  However, with the conventional print control method, even when data with different ink compositions do not overlap within the same scan, printing is performed with the number and positions of nozzles suitable for using ink compositions having different penetrability. I was doing control. For this reason, the number of scans is the same as in the case where images with different ink compositions do not overlap within the same scan.

  In view of the above, an object of the present invention is to provide a recording apparatus that flexibly changes the paper feed amount and the number of nozzles used to reduce the number of unnecessary scans.

In order to solve the above-described problem, an inkjet recording apparatus according to the present invention includes a first nozzle row composed of a plurality of nozzles that eject highly permeable ink, and the first nozzle row in the arrangement direction of the first nozzle row. A second nozzle row having a length twice as long as the nozzle row and arranged in parallel in the same direction as the arrangement direction of the first nozzle row and comprising a plurality of nozzles that eject low permeability ink; Including a recording head;
Scanning means for reciprocatingly scanning the recording head in a direction different from the arrangement direction of the first and second nozzle rows;
Conveying means for conveying a recording medium in a direction perpendicular to the scanning direction of the recording head;
First determination means for determining whether or not the recording data used for recording in the next scan target area by the first nozzle row includes recording data used for recording with highly permeable ink;
As a result of the determination by the first determination means, when it is determined that there is no recording data used for recording with highly permeable ink, the length of the first nozzle row is further increased from the next scanning target area. In the recording data used for recording in the scanning target region shifted in the arrangement direction of the first nozzle row, the position where the recording is performed with the high permeability ink and the position where the recording is performed with the low permeability ink are pixels. Second determination means for determining whether there is recording data overlapping in units;
As a result of the determination by the second determination unit, when it is determined that there is no overlapping recording data, the conveyance unit is controlled to convey the recording medium by the length of the second nozzle row. On the other hand, when it is determined that there is overlapped recording data, a transport control unit that controls the transport unit to transport the recording medium by the length of the first nozzle row.

An inkjet recording control method according to the present invention includes a first nozzle row composed of a plurality of nozzles that eject highly permeable ink, and twice the first nozzle row in the arrangement direction of the first nozzle row. A recording head including a second nozzle row having a length and arranged in parallel in the same direction as the arrangement direction of the first nozzle row and comprising a plurality of nozzles that eject low permeability ink, A recording control method executed in an ink jet recording apparatus that records on a recording medium by reciprocating scanning in a direction different from the arrangement direction of the first and second nozzle rows,
A first determination step of determining whether or not the recording data used for recording in the next scanning target area by the first nozzle row includes recording data used for recording with highly permeable ink;
As a result of the determination in the first determination step, when it is determined that there is no recording data used for recording with highly permeable ink, the length of the first nozzle row is further increased from the next scanning target area. In the recording data used for recording in the scanning target region shifted in the arrangement direction of the first nozzle row, the position where the recording is performed with the high permeability ink and the position where the recording is performed with the low permeability ink are pixels. A second determination step of determining whether there is recording data overlapping in units;
A conveying step of conveying a recording medium in a direction perpendicular to the scanning direction of the recording head;
As a result of the determination in the second determination step, when it is determined that there is no overlapping recording data, the recording step is controlled to convey the recording medium by the length of the second nozzle row. On the other hand, when it is determined that there is overlapped recording data, a conveyance control step of controlling the conveyance of the recording medium by the length of the first nozzle row by the conveyance step is provided.

  According to the present invention, it is possible to flexibly change the paper feed amount and the number of nozzles used, and reduce the number of unnecessary scans.

1 is an external perspective view showing an outline of a configuration of an ink jet recording apparatus that is a typical embodiment of the present invention. FIG. 2 is a block configuration diagram centering on a control portion of a recording apparatus in an embodiment according to the present invention. It is a figure which shows the nozzle structure used in a present Example. It is a figure which shows the nozzle structure used in a present Example. It is a flowchart which shows the procedure of the process of the recording control in a present Example. It is a figure explaining operation | movement of a nozzle when the area | region which uses a low permeable ink, and the area | region which uses a highly permeable ink overlap. It is a figure explaining operation | movement of a nozzle when the area | region which uses a low permeable ink, and the area | region which uses a highly permeable ink do not overlap. It is a figure explaining operation | movement of a nozzle when the area | region which uses a low permeable ink, and the area | region which uses a highly permeable ink overlap. It is a figure explaining operation | movement of the nozzle in the case where the area | region using a low permeable ink and the area | region using a highly permeable ink do not overlap in the past.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail, referring drawings. In addition, the same reference number is attached | subjected to the same component and description is abbreviate | omitted. The present invention is not limited to the following examples, and various changes and modifications included in the concept of the present invention described in the claims can be made by further combining them. Therefore, it can naturally be applied to other techniques belonging to the spirit of the present invention.

  In the embodiments described below, a recording apparatus using a recording head according to an ink jet method will be described as an example. In this specification, “recording” (sometimes referred to as “printing”) is not only for forming significant information such as characters and figures, but also for human beings visually perceived regardless of significance. Regardless of whether or not it has been manifested, it also represents a case where an image, a pattern, a pattern, or the like is widely formed on a recording medium or the medium is processed. “Recording medium” refers not only to paper used in general recording apparatuses but also widely to cloth, plastic film, metal plate, glass, ceramics, wood, leather, and the like that can accept ink. Shall. Furthermore, “ink” (sometimes referred to as “liquid”) is to be interpreted broadly in the same way as the definition of “recording (printing)” above. It represents a liquid that can be used for forming a pattern or the like, processing a recording medium, or processing an ink (for example, solidification or insolubilization of a colorant in ink applied to the recording medium).

  Furthermore, unless otherwise specified, the “nozzle” collectively refers to an ejection port or a liquid channel communicating with the ejection port and an element that generates energy used for ink ejection.

<Description of Inkjet Recording Apparatus (FIG. 1)>
FIG. 1 is an external perspective view showing an outline of the configuration of an ink jet recording apparatus which is a typical embodiment of the present invention.

  As shown in FIG. 1, an ink jet recording apparatus (hereinafter referred to as a recording apparatus 100) transmits a driving force generated by a carriage motor M1 to a carriage 102 on which a recording head 103 that performs recording by discharging ink in accordance with an ink jet system is mounted. The information is transmitted from the mechanism 104, and the carriage 102 is reciprocally scanned in the arrow A direction. At the same time, the recording medium P such as recording paper is fed through the paper feeding mechanism 105, conveyed to the recording position in the direction perpendicular to the scanning direction, and ink is ejected from the recording head 103 to the recording medium P at the recording position. To record.

  Further, in order to maintain the state of the recording head 103 satisfactorily, the carriage 102 is moved to the position of the recovery device 110, and the ejection recovery process of the recording head 103 is performed intermittently.

  In addition to mounting the recording head 103 on the carriage 102 of the recording apparatus 100, an ink cartridge 106 for storing ink to be supplied to the recording head 103 is mounted. The ink cartridge 106 is detachable from the carriage 102.

  The recording apparatus 100 shown in FIG. 1 is capable of color recording. For this reason, the carriage 102 contains four inks containing magenta (M), cyan (C), yellow (Y), and black (K) inks, respectively. An ink cartridge is installed. These four ink cartridges are detachable independently.

  The carriage 102 and the recording head 103 can achieve and maintain a required electrical connection by properly contacting the joint surfaces of both members. The recording head 103 selectively discharges ink from a plurality of discharge ports and records by applying energy according to a recording signal. In particular, the recording head 103 of this embodiment employs an ink jet system that ejects ink using thermal energy, and includes an electrothermal transducer to generate thermal energy, which is applied to the electrothermal transducer. Electric energy is converted into thermal energy, and ink is ejected from the ejection port by utilizing pressure changes caused by bubble growth and contraction caused by film boiling caused by applying the thermal energy to the ink. The electrothermal transducer is provided corresponding to each of the ejection ports, and ink is ejected from the corresponding ejection port by applying a pulse voltage to the corresponding electrothermal transducer in accordance with the recording signal.

  As shown in FIG. 1, the carriage 102 is connected to a part of the driving belt 107 of the transmission mechanism 104 that transmits the driving force of the carriage motor M <b> 1, and slides in the direction of arrow A along the guide shaft 113. It is guided and supported freely. Accordingly, the carriage 102 reciprocates along the guide shaft 113 by forward rotation and reverse rotation of the carriage motor M1. In addition, a scale 108 is provided for indicating the absolute position of the carriage 102 along the movement direction (arrow A direction) of the carriage 102. In this embodiment, the scale 108 uses a transparent PET film with black bars printed at the required pitch, one of which is fixed to the chassis 109 and the other is supported by a leaf spring (not shown). Yes.

  Further, the recording apparatus 100 is provided with a platen (not shown) facing the discharge port surface where the discharge port (not shown) of the recording head 103 is formed, and the recording head 103 is driven by the driving force of the carriage motor M1. At the same time as the carriage 102 mounted with is reciprocated, recording is performed over the entire width of the recording medium P conveyed on the platen by supplying a recording signal to the recording head 103 and discharging ink.

  Further, in FIG. 1, 114 is a conveyance roller driven by a conveyance motor M2 to convey the recording medium P, 115 is a pinch roller that abuts the recording medium P against the conveyance roller 114 by a spring (not shown), and 116 is a pinch. A pinch roller holder 117 that rotatably supports the roller 115 is a conveyance roller gear fixed to one end of the conveyance roller 114. Then, the conveyance roller 114 is driven by the rotation of the conveyance motor M2 transmitted to the conveyance roller gear 117 via an intermediate gear (not shown).

  Further, reference numeral 120 denotes a discharge roller for discharging the recording medium P on which the image is formed by the recording head 103 to the outside of the recording apparatus, and is driven by the rotation of the transport motor M2 being transmitted. . The discharge roller 120 abuts on a spur roller (not shown) that presses the recording medium P by a spring (not shown). 122 is a spur holder that rotatably supports the spur roller.

  Further, as shown in FIG. 1, the recording apparatus 100 includes a desired position (for example, a home position) outside the range of reciprocating motion (outside the recording area) for the recording operation of the carriage 102 on which the recording head 103 is mounted. A recovery device 110 for recovering the ejection failure of the recording head 103 is disposed at a position corresponding to the position).

  The recovery device 110 includes a capping mechanism 111 for capping the ejection port surface of the recording head 103 and a wiping mechanism 112 for cleaning the ejection port surface of the recording head 103, and interlocks with the capping of the ejection port surface by the capping mechanism 111. Ink recovery such as forcibly discharging ink from the discharge port by suction means (suction pump or the like) in the recovery device, thereby removing ink or bubbles having increased viscosity in the ink flow path of the recording head 103. Process.

  Further, at the time of non-printing operation or the like, by capping the ejection port surface of the recording head 103 by the capping mechanism 111, the recording head 103 can be protected and ink evaporation and drying can be prevented. On the other hand, the wiping mechanism 112 is disposed in the vicinity of the capping mechanism 111 and wipes ink droplets adhering to the discharge port surface of the recording head 103.

  The capping mechanism 111 and the wiping mechanism 112 can keep the ink ejection state of the recording head 103 normal.

  FIG. 2 is a block diagram showing the control part of the recording apparatus in the embodiment according to the present invention. In the figure, a central processing unit (CPU) 1 controls the entire printing apparatus in accordance with a control procedure program or the like shown in the flowchart of FIG.

  The RAM 3 is a memory area for storing the work area of the CPU and data received by the host I / F unit 10, or a memory area for storing print data (hereinafter also referred to as recording data) and data related to the print data. used. As data related to the recording data, there are the number of dots of the recording data, print area information obtained by counting from the number of dots, and the like.

  The CR control unit 4 controls the drive of the carriage motor. The LF control unit 5 performs motor drive control for line feed. The head control unit 6 is electrically connected to the recording head, and performs drive control of the recording head, such as sensing the temperature of the head with a temperature sensor and performing appropriate temperature control with a temperature heater or the like.

  The print control unit 7 gives control commands necessary for printing to the control units of the CR control unit 4, the LF control unit 5, and the head control unit 6 based on the recording data sent from each control unit. The recording data sent from the data analysis unit 8 is stored on the RAM 3. At that time, the number of dots is counted for each color of the recording data, and the counted number of dots is stored in the RAM 3. Furthermore, print area information is calculated from the counted number of dots and stored in the RAM 3.

  Further, the print control unit 7 determines whether or not the recording data in the scanning target area by the recording head includes the recording data used for recording with the ink having high permeability or low permeability. In addition, the print control unit 7 determines whether there is print data in which print data having different ink penetrability (low penetrability and high penetrability, etc.) overlap in pixel units within the same scanning target region. By this determination, in this embodiment, the number and position of the used nozzles are changed as described later, and the conveyance of the recording medium is controlled. As a result, the number of unnecessary scans can be reduced.

  The data analysis unit 8 analyzes the data received by the host I / F unit 10 and sends it to the print control unit 7 or the print buffer control unit 9. The print buffer controller 9 controls the size and quantity of the memory area for storing the recording data on the RAM 3 from the data analyzed by the data analyzer 8. The host I / F unit 10 receives data sent from a host computer or the like. The data analysis unit 8 analyzes the data received by the host I / F unit 10 and sends it to the print control unit 7. The system bus 11 connects the above-described components to the CPU 1.

  3 and 4 are diagrams showing a nozzle configuration mounted on a recording head used in this embodiment. 3 and 4, the nozzle row in the left column shows the nozzle row that ejects black ink (Bk), and the right column summarizes the nozzle row that ejects other chromatic ink (color ink, Cl) in terms of expression. It shows.

  As shown in FIGS. 3 and 4, the first nozzle row indicated by Cl is composed of a plurality of nozzles that discharge highly permeable ink. The second nozzle row indicated by Bk has a length twice as long as the first nozzle row in the arrangement direction of the first nozzle row, and is in the same direction as the arrangement direction of the first nozzle row. It consists of a plurality of nozzles that are arranged in parallel and eject low-permeability ink.

  In FIG. 3, the low penetrability black ink is ejected by 129 to 256 nozzles, and the high penetrability color ink is ejected by 1 to 128 nozzles. In FIG. 4, low penetrability black ink is ejected from 1 to 256 nozzles, and high penetrability color ink is ejected from 1 to 128 nozzles.

  With the above configuration, in this embodiment, the presence / absence of recording data for printing highly permeable ink (for example, color ink) is determined in a region next to the focused scanning target region (scanning target region). In the determination, if it is determined that there is no recording data for printing highly permeable ink, whether there is data in which data having different ink compositions overlap in the same scanning target area in the next scanning target area. Determine whether. If it is determined that there is no overlapping data, the paper feed amount and the number of low permeability ink nozzles are increased (the number of low permeability ink nozzles is changed as shown in FIGS. 3 to 4). ) Perform print control. As a result, in this embodiment, the number of unnecessary scans can be reduced.

  FIG. 5 is a flowchart showing the procedure of the inkjet recording control process in this embodiment. Hereinafter, a description will be given with reference to the flowchart shown in FIG. The procedures of these flowcharts are realized by the CPU 1 executing a program stored in the ROM 2.

  First, in step S1 shown in FIG. 5, the print control unit 7 determines whether or not there is print data using highly permeable ink in an unprinted area (next scan target area) up to 128 nozzles ahead. For example, as shown in FIG. 6, when the scanning target area A is printed with only the low permeability ink in the first scan, the scanning target area A is an unprinted area with the high permeability ink. In step S1, it is determined whether or not there is recorded data using highly permeable ink in the unprinted area (an example of a first determination). Here, if it is determined that there is recording data with highly penetrating ink, the process proceeds to step S2, and paper feeding is executed for 128 nozzles. For example, this operation is equivalent to the operation from the first scan to the second scan shown in FIG.

  Next, in step S3, printing is performed using a nozzle as shown in FIG. That is, low penetrability black ink is ejected from 129 to 256 nozzles in the second nozzle row, and high penetrability color ink is ejected from 1 to 128 nozzles in the first nozzle row. For example, the second scan shown in FIG. 6 shows this operation, and the scan target area B is printed with the low permeability ink (Bk), and the scan target area A is printed with the high permeability ink (Cl).

  When the recording data using the low permeability ink and the high permeability ink overlap in the same scan target area in units of pixels as in the scan target area A of FIG. 6, the processing as shown in steps S1 to S3 is performed. Done. In that case, as shown in FIG. 6, processing is performed by seven scans. On the other hand, if it is determined in step S1 that there is no recording data with highly permeable ink, the process proceeds to step S4.

  In step S4, the high-permeability ink and the low-permeability ink are overlapped in units of pixels in an unprinted area (scanning target area next to the scanning target area in step S1) from 129 nozzles to 256 nozzles. It is determined whether there is any recorded data.

  This operation will be described with reference to FIG. Now, assume that it is determined in step S1 that there is no highly permeable color ink in the scanning target region C of FIG. In this case, in step S4, it is determined whether or not there is print data in which the high permeability ink and the low permeability ink overlap in pixel units in the next scan target area (scan target area D in FIG. 7). (Example of second determination).

  If it is determined in step S4 that there is no overlapping data, the process proceeds to step S5, and paper feeding is executed for 256 nozzles. For example, this operation is equivalent to the operation from the second scan to the third scan shown in FIG. That is, in this case, the position where the paper feed is normally executed from the position of the second scan to the position of the 3 'scan is executed up to the position of the third scan, and one paper feed operation is skipped.

  Next, in step S6, printing is performed using a nozzle as shown in FIG. That is, low penetrability black ink is ejected from 1 to 256 nozzles in the second nozzle row, and high penetrability color ink is ejected from 1 to 128 nozzles in the first nozzle row. For example, the third scan shown in FIG. 7 shows this operation, and the scan target areas D and E are printed with the low permeability ink (Bk), and the scan target area D is printed with the high permeability ink (Cl).

  Again, refer to step S4. If it is determined in step S4 that there is overlapping data, the process proceeds to step S7, and paper feeding is executed for 128 nozzles. This is the same as the operation in step S2, and is equivalent to the operation from the second scan to the third scan shown in FIG.

  Next, in step S8, printing is performed using a nozzle as shown in FIG. That is, low penetrability black ink is ejected from 129 to 256 nozzles in the second nozzle row, and high penetrability color ink is ejected from 1 to 128 nozzles in the first nozzle row. In this embodiment, in any case, the highly permeable color ink is ejected by 1 to 128 nozzles of the first nozzle row when there is print data.

  As described above, when it is determined in step S4 that there is no print data in which the high permeability ink and the low permeability ink overlap in pixel units, the number of scans is reduced using both inks in the same scan. However, when it is determined that there is overlapping recording data, the high-penetration ink and the low-penetration ink are used in a plurality of scans with respect to the scanning target region without skipping the paper feeding operation. As a result, it is possible to prevent problems such as bleeding due to the use of the high permeability ink and the low permeability ink in the same scanning.

  FIG. 9 shows that, conventionally, there is no recording data using highly permeable ink in the scanning target area C, and there is no recording data in which the low permeable ink and the highly permeable ink overlap in the scanning target area D. It is a figure explaining operation | movement when it determines. Conventionally, as shown in FIG. 9, the scan target region D is also scanned twice, as in the fourth and fifth scans.

  However, in this embodiment, as shown in FIG. 7, the nozzle configuration is changed as shown in FIGS. 2 to 3, and the paper feed is performed for 256 nozzles (three scans from the second scan shown in FIG. 7). Therefore, the number of scans can be reduced as compared with FIG.

DESCRIPTION OF SYMBOLS 100 Recording device 102 Carriage 103 Recording head 104 Transmission mechanism 105 Paper feeding mechanism 106 Ink cartridge 107 Drive belt 108 Scale 109 Chassis 110 Recovery device 111 Capping mechanism 112 Wiping mechanism 113 Guide shaft 114 Conveying roller 115 Pinch roller 116 Pinch roller holder 117 Conveying roller gear 120 discharge roller 122 spur holder

Claims (3)

A first nozzle row composed of a plurality of nozzles that ejects highly permeable ink, and has a length twice as long as the first nozzle row in the arrangement direction of the first nozzle row, A recording head including a second nozzle array that is arranged in parallel in the same direction as the arrangement direction of the nozzle arrays and includes a plurality of nozzles that eject low-permeability ink;
Scanning means for reciprocatingly scanning the recording head in a direction different from the arrangement direction of the first and second nozzle rows;
Conveying means for conveying a recording medium in a direction perpendicular to the scanning direction of the recording head;
First determination means for determining whether or not the recording data used for recording in the next scan target area by the first nozzle row includes recording data used for recording with highly permeable ink;
As a result of the determination by the first determination means, when it is determined that there is no recording data used for recording with highly permeable ink, the length of the first nozzle row is further increased from the next scanning target area. In the recording data used for recording in the scanning target region shifted in the arrangement direction of the first nozzle row, the position where the recording is performed with the high permeability ink and the position where the recording is performed with the low permeability ink are pixels. Second determination means for determining whether there is recording data overlapping in units;
As a result of the determination by the second determination unit, when it is determined that there is no overlapping recording data, the conveyance unit is controlled to convey the recording medium by the length of the second nozzle row. On the other hand, when it is determined that there is overlapped recording data, a conveyance control unit that controls the conveyance unit to convey the recording medium by the length of the first nozzle row is provided. An ink jet recording apparatus.   2. The inkjet recording apparatus according to claim 1, wherein each nozzle of the first nozzle row discharges chromatic color ink, and each nozzle of the second nozzle row discharges black ink. A first nozzle row composed of a plurality of nozzles that ejects highly permeable ink, and has a length twice as long as the first nozzle row in the arrangement direction of the first nozzle row, An arrangement of the first and second nozzle arrays is a recording head that is arranged in parallel in the same direction as the arrangement direction of the nozzle arrays and includes a second nozzle array composed of a plurality of nozzles that eject low permeability ink. A recording control method executed in an inkjet recording apparatus that records on a recording medium by reciprocating scanning in a direction different from the direction,
A first determination step of determining whether or not the recording data used for recording in the next scanning target area by the first nozzle row includes recording data used for recording with highly permeable ink;
As a result of the determination in the first determination step, when it is determined that there is no recording data used for recording with highly permeable ink, the length of the first nozzle row is further increased from the next scanning target area. In the recording data used for recording in the scanning target region shifted in the arrangement direction of the first nozzle row, the position where the recording is performed with the high permeability ink and the position where the recording is performed with the low permeability ink are pixels. A second determination step of determining whether there is recording data overlapping in units;
A conveying step of conveying a recording medium in a direction perpendicular to the scanning direction of the recording head;
As a result of the determination in the second determination step, when it is determined that there is no overlapping recording data, the recording step is controlled to convey the recording medium by the length of the second nozzle row. On the other hand, when it is determined that there is overlapped recording data, a conveyance control step of controlling the conveyance of the recording medium by the length of the first nozzle row by the conveyance step is provided. An ink jet recording control method.

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