JP4958997B2 - Inkjet recording method and inkjet recording apparatus - Google Patents

Description

  The present invention relates to an ink jet recording method and an ink jet recording apparatus, and more particularly to a configuration for reducing bleeding at the boundary between a black image recording area and a color image recording area when recording is performed using black ink or other color ink. Is.

  Recording devices having functions such as printers, copiers, facsimiles, etc., or composite electronic devices including computers and word processors, recording devices used as output devices for information processed by workstations, etc., image information (character information, etc.) Image (including characters and the like) is recorded on a recording medium such as paper or a plastic thin plate. Such a recording apparatus can be classified into an ink jet method, a wire dot method, a thermal transfer method, a laser beam method, and the like according to a recording method. Among these, an ink jet recording apparatus (hereinafter also referred to as an ink jet recording apparatus) performs recording by ejecting ink from a recording head onto a recording medium, and can easily achieve higher definition than other recording systems. In addition, it has various advantages that recording can be performed at high speed and with high silence, and the apparatus is relatively inexpensive.

  On the other hand, there are many color recording needs for such ink jet recording apparatuses, and many color ink jet recording apparatuses are also provided. In order to improve the recording speed, the ink jet recording apparatus uses a recording head in which a plurality of recording elements are integrated and arranged, and uses a plurality of ink discharge ports and ink paths as ink discharge units, and further supports color recording. Therefore, it is common to have a plurality of recording heads corresponding to each color ink.

  FIG. 1 is a perspective view illustrating an example of a schematic configuration of a recording unit mainly in an ink jet recording apparatus.

In the figure, a recording head 102 and an ink cartridge 101 are detachably mounted on a carriage 106 and used for recording. That is, the recording head and the ink cartridge are used corresponding to the color inks of black ink (Bk), cyan (C), magenta (M), and yellow (Y). Scanning for recording is performed by movement. Hereinafter, this scanning is also called main scanning, and the direction is called main scanning direction. The carriage 106 is slidably engaged with the guide shaft 107 and can be moved along the guide shaft 107 by being driven by a driving mechanism such as a motor or a belt (not shown).

  FIG. 2 is a view of the ejection openings provided in the respective recording heads 102 as viewed from the z direction (FIG. 1). In the figure, 201 is an ejection port in which n nozzles are arranged on the recording head 102, and each ejection port is arranged at a density of Ndpi. This recording head can employ various ejection methods. For example, a method is used in which bubbles are generated in ink using the thermal energy generated by the electrothermal transducer, and ink is ejected by the pressure of the bubbles. be able to.

  Referring again to FIG. 1, reference numeral 103 denotes a paper feed roller, which rotates in the direction of the arrow while holding the recording paper P together with the auxiliary roller 104, and moves the recording paper P as a recording medium in the y direction (hereinafter, “ (Also called “sub-scanning direction”). Reference numeral 105 denotes a paper feed roller that feeds the recording paper and plays the role of applying a certain tension to the recording paper P, like the rollers 103 and 104.

  At the time of non-printing, the carriage 106 moves to the home position h and waits for a print command. At the time of printing, the carriage 106 scans the print head 102 for each ink while moving in the x direction. Recording can be performed by discharging ink from the discharge port 201 according to image information. When recording of image information is completed up to the end of the recording paper P by this main scanning, the carriage returns to the recording start position, during which a predetermined amount of recording paper P is conveyed, and then scanned in the x direction again. Repeat recording.

  When recording an image or the like, various image quality factors such as color developability, gradation, and density uniformity of the recorded image are required. In particular, with regard to density uniformity, due to slight variations in the ejection port units that occur in the manufacturing process of the recording head, etc., variations occur in the ink ejection amount and ejection direction for each ejection port. It is known that it may appear.

  A specific example will be described with reference to FIGS. In FIG. 3A, reference numeral 31 denotes a recording head, which is composed of eight ejection ports 32. Reference numeral 33 denotes ink droplets (ink droplets) ejected from each of the eight ejection ports 32. Ideally, the ink is ejected in substantially the same direction and in the same direction as shown in this figure. is there. If such ideal ejection is performed, as shown in FIG. 3B, ink dots of almost the same size are formed on the recording paper surface, and there is no density unevenness as a whole (FIG. 3 ( c)) A uniform image is obtained.

  However, in actuality, as described above, there are variations in the degree of the discharge ports, and when recording is performed in the same manner as described above, as shown in FIG. Variations in the size and orientation of the ejected ink drop result in the formation of ink dots that vary in size and recording position as shown in FIG. 4B on the recording paper surface.

  As a result, for example, there is a ground portion of the recording paper that periodically does not satisfy the area factor of 100% in the arrangement direction of the discharge ports, which occurs as white stripes, or conversely, dots overlap more than necessary. An image will be recorded. Such an image has a density distribution shown in FIG. 4C in the ejection port arrangement direction, which is perceived as density unevenness by the human naked eye. In addition, streaks due to variations in the paper feed amount may occur.

  As a countermeasure against such density unevenness, for example, Patent Document 1 proposes the following method. The method will be briefly described with reference to FIGS.

  In this method, as shown in FIG. 5A, the same recording area as that shown in FIG. 4 or the like is scanned three times by a recording head 31 with a paper feed having a width corresponding to four ejection openings. Complete by. That is, a scanning area corresponding to each of the four ejection openings corresponding to half of the recording area is completed by two scans. At this time, each scanning area is the lower of the eight ejection openings of the recording head in the first scanning. In the second scanning after feeding paper for four ejection ports using four ejection ports, printing is performed using the upper four ejection ports. Then, in one scan for each ejection port, dot recording is performed by thinning the image data by about half according to a predetermined pixel pattern, and dot recording is performed by the remaining half of the image data in the second scan. Complete the record. Hereinafter, such a recording method is referred to as a multipass recording method.

  According to this multi-pass recording method, even if the recording head shown in FIG. 4 having a variation in ejection characteristics for each ejection port is used, the variation in dot size and the recording position due to this variation is dispersed. Therefore, as shown in FIG. 5B, the recorded image does not have the formation of dots that are recognized as black stripes or white stripes, which is substantially uniform as shown in FIG. 5C. It will be recognized as a concentration distribution.

  When this multi-pass printing is performed, thinning is performed according to the mutually complementary pixel patterns in the first scan and the second scan, and the pixel patterns are as shown in FIGS. In addition, it is common to use a checkered pattern for each of the vertical and horizontal pixels. In this case, in the first scan, the pixels corresponding to the checkered pattern black are recorded as shown in FIG. 6A, and in the second scan, the pixel corresponds to white as shown in FIG. 6B. The entire recording can be completed by recording the pixels to be recorded (FIG. 6C).

  As described above, a high-quality image with reduced density unevenness can be obtained by completing an image using two different ejection openings for each line having the same dot arrangement in the scanning direction.

  In addition to the above-described density unevenness reduction, as another factor for improving the image quality of a recorded image, a technique for preventing bleeding at an adjacent boundary between a black image and a color image is known. For example, the method disclosed in Patent Document 2 uses a predetermined discharge portion of a discharge group for discharging black ink when a black image recorded with black ink and a color image recorded with color ink are adjacent to each other. By doing so, the scan for recording the black image and the scan for recording the color image are made different scans so that they are not continuous. That is, another scan is performed between the scan for recording a black image and the scan for recording a color image adjacent to the black image, thereby securing a time for fixing the previously recorded black image, for example. In addition, high-quality recording is achieved with reduced bleeding (bleeding) at the border between the black image and the color image.

Japanese Patent Laid-Open No. 06-143618 Japanese Patent Laid-Open No. 06-135014

  However, in the case where the above-described multi-pass recording is performed, in order to reduce the blur at the boundary between the black image and the color image (hereinafter also referred to as “between colors”), the method disclosed in Patent Document 2 is used as it is. Cannot be used. That is, since the method disclosed in the above publication is a method of recording a black image or a color image by each scanning of the recording head (hereinafter also referred to as “one-pass recording”), The premise method is different from the multipass recording method for completing the recording in the predetermined area, and even if this method is used as it is, it is not possible to create a scan for securing the fixing time.

  In addition to the inter-color blur, the phenomenon that the recording portion becomes whitish due to the ink pressing when a plurality of colors of ink land on the recording medium is also different between the one-pass recording and the multi-pass recording described in the above publication. The difference between these phenomena is that, in addition to the effect that the multi-pass printing method prevents density unevenness, the number of dots to be printed per unit time per unit area is small, so that the ink permeation state and the fixing state are 1 This is due to the difference from the pass record.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to enable recording of a high-quality image with reduced inter-color bleeding that can occur in a multi-pass printing method. An inkjet recording method and an inkjet recording apparatus are provided.

Therefore, the present invention is an ink jet recording method in which recording is performed by ejecting ink while scanning the recording head relative to the recording medium, and the recording head ejects the first type of ink. The first ejection port array and the second ejection port array for ejecting the second type ink having higher permeability than the first type ink are arranged in a direction different from the scanning direction. Then, the number of scans with respect to a predetermined area on the recording medium for completing an image with the first ejection port array is m (m: a positive integer), and an image is completed with the second ejection port array. The number of scans for the predetermined area for n is n (n is a positive integer, and m and n are different), and at least one of m and n is 2 or more, and the scan is performed for each scan. Conveying the recording medium in a direction different from the direction of Is set to L (L: positive number), and for each of the first and second ejection port arrays, the position of the ejection port at the end of the sheet feeding side involved in the conveyance of the recording medium is the first The second ejection port array is separated from the ejection port array by a length of (m + a) × L (a: positive integer) in the paper discharge direction related to conveyance of the recording medium.

According to the above configuration, when so-called multi-pass printing is performed, the position of the discharge port at the end of the sheet feeding side involved in the conveyance of the recording medium is set to the first and second discharge port arrays. The second discharge port array is separated from the discharge port array by a length (m + a) × L (a: positive integer) in the paper discharge direction related to the conveyance of the recording medium, or the first image Between the scan for completing the recording and the first scan for recording the second image, there is a scan in which no recording is performed on the area where the first image is recorded. And the image by the second ejection port array recorded adjacent thereto are recorded with at least one scan. Accordingly, it is possible to provide a time for fixing the ink by the first ejection row on the recording medium.

1 is a perspective view illustrating a schematic configuration of a main part of an ink jet recording apparatus to which the present invention is applicable. It is a figure which shows typically the discharge port arrangement | sequence in the conventional example of the recording head used with the said inkjet recording device. (A), (b), and (c) are the figures explaining the ideal recording state in an inkjet recording device. (A), (b), and (c) are diagrams for explaining a recording state in which density unevenness occurs in an ink jet recording apparatus. (A), (b), and (c) are diagrams for explaining density unevenness reduction by the multipass printing method used in the embodiment of the present invention. (A), (b) and (c) is a figure explaining the said multipass printing method. It is a block diagram which shows the control structure of the inkjet recording device shown in FIG. FIG. 3 is a schematic diagram illustrating an ejection port arrangement in an example in which the black ink and the color ink head of the recording head according to the first embodiment of the present invention are separate types. FIG. 3 is a schematic diagram illustrating an ejection port arrangement in an example in which a black ink and a color ink head of a recording head according to the first embodiment of the present invention are integrated. It is a schematic diagram which shows the discharge port arrangement | sequence in the example by which the discharge port was arranged in zigzag form about the said integral type and a separate type | mold. It is a figure which shows typically the pattern of the thinning data used by the multipass recording in the 1st Embodiment of this invention. It is a figure explaining the recording method by the 1st Embodiment of this invention. FIG. 6 is a schematic diagram illustrating another example of an ejection port array in a recording head applicable to the first embodiment of the present invention. FIG. 6 is a schematic diagram illustrating still another example of the ejection port array in the recording head applicable to the first embodiment of the present invention. FIG. 10 is a schematic diagram illustrating an ejection port arrangement in an example in which a black ink and a color ink head of a recording head according to a second embodiment of the present invention are separate types. (a) And (b) is a figure which shows typically the pattern of the thinning data used by the multipass recording in the 2nd and 3rd embodiment of this invention. It is a figure explaining the recording method by the 2nd Embodiment of this invention. FIG. 9 is a schematic diagram illustrating another example of an ejection port array in a recording head applicable to the second embodiment of the present invention. FIG. 10 is a schematic diagram illustrating an ejection port arrangement in an example in which a black ink and a color ink head of a recording head according to a third embodiment of the present invention are separate types. It is a figure explaining the recording method by the 3rd Embodiment of this invention. FIG. 10 is a schematic diagram illustrating another example of an ejection port array in a recording head applicable to the third embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 7 is a block diagram showing a control configuration of the ink jet recording apparatus according to the embodiment of the present invention. The mechanical configuration of the ink jet recording apparatus of the present embodiment is the same as that shown in FIG. However, in each of the following embodiments, as shown in FIG. 8 and the like, particularly the ejection port arrangement of the recording head is different from the conventional one described above.

  As shown in FIG. 7, the control configuration of this embodiment is a software processing such as an image input unit 703 that accesses the main bus line 705, an image signal processing unit 704 corresponding to the image input unit 703, and a CPU (central control unit) 700. Configuration, operation unit 706, recovery system control circuit 707, inkjet head temperature control circuit 714, head drive control circuit 715, drive control circuit 716 of carriage 106, control circuit 717 for controlling the driving of roller 104 for paper feeding, etc. Broadly divided into hardware processing configurations.

  In this configuration, the CPU 700 uses a ROM 701 and a random memory (RAM) 702 to execute control of the entire inkjet recording apparatus. That is, according to the processing program stored in the ROM 7012, the recording head driving and the conveyance of the recording paper according to each embodiment described in detail below are controlled. The RAM 702 is used as a work area in the control process. The CPU 700 also performs predetermined image processing on the input image information regarding the print head drive control, and controls the ejection of the print head 713 via the head drive control circuit 715 based on the resulting print data.

  The RAM 702 stores, for example, a program for executing a head recovery timing chart, and applies recovery conditions such as preliminary ejection conditions to the recovery system control circuit 707, the recording head, the heat retaining heater, and the like as necessary. The recovery system motor 708 drives the recording head 713 (102) and the cleaning blade 709, the cap 710, and the suction pump 711 facing and separating from the recording head 713 (102).

  As described above, the head drive control circuit 715 drives the electrothermal transducer for ink ejection of the print head 713 based on the print data under the control of the CPU 700 as described above. Further, the head drive control circuit 715 switches the use range of the ejection port in the black ink recording head in accordance with an instruction from the CPU 700. Specifically, in the mode for recording a full color image in which a black image and a color image are mixed as shown in each of the following embodiments, only some of the ejection openings of the black ink recording head are used, while document information including characters or the like is used. In the recording mode, only the black ink recording head is used as the recording head. In this case, switching is performed so that all the ejection openings of the recording head are used.

  Note that a heat retaining heater is provided on the substrate on which the electrothermal transducer for ink discharge of the recording head 713 (102) is provided, and the head temperature control circuit 714 based on the temperature detected by the diode sensor 712 is provided. By control, the ink temperature in the recording head can be adjusted by heating to a desired set temperature. The diode sensor 712 is also provided on the substrate in the same manner, and is used for measuring a substantial ink temperature inside the recording head. Similarly, the diode sensor 712 may be provided not on the substrate but on the outside or in the vicinity of the recording head.

  Several embodiments of the present invention based on the above apparatus configuration will be described below.

(First embodiment)
FIG. 8 is a diagram showing a recording head according to the first embodiment of the present invention. The first recording head (hereinafter also referred to as a black head) 102Bk that discharges black ink according to the present embodiment has a density of N = 600 per inch (600 dpi), and n = 28 ejection ports. Are arranged in the sub-scanning direction, which is the transport direction. On the other hand, each recording head 102C that discharges cyan (C), magenta (M), and yellow (Y) inks (hereinafter referred to as a color head and representatively shown as one recording head 102C) is 1 inch. Similarly, (600 dpi) n = 12 ejection openings are arranged in the sub-scanning direction at a density of N = 600 per hit. The color head 102C is mounted on the recording apparatus so that the twelve discharge ports n1 to n12 of the black head 102Bk are similarly positioned in the sub-scanning direction of the twelve discharge ports n1 to n12. . Accordingly, the remaining ejection ports n13 to n28 of the black head 102Bk are positions that do not overlap with the ejection ports of the color head 102C. Further, the black head, the color head, and the respective color heads are arranged at predetermined intervals in the main scanning direction.

  In the present embodiment, in a full color recording mode in which an image in which a black image and a color image are mixed is recorded, there are twelve ejection ports n17 to n28 used for recording by the black head 102Bk. On the other hand, in the color head 102C, all twelve discharge ports of the discharge ports n1 to n12 are used. In a mode for recording a document composed of black characters, only the black head 102Bk is used, and in that case, all of the ejection ports n1 to n28 are used.

  Note that the recording head for ejecting black ink and the recording head for ejecting color ink may be configured as an integrated recording head as shown in FIG. Further, as shown in the separation type in FIG. 10A and the integral type in FIG. 10B, the discharge port arrays may be arranged in a staggered pattern instead of one, and the drive signals at this time are recorded. The ejection port group that precedes the scanning of the head is given at an earlier timing by d / v [seconds] than the subsequent ejection port group. That is, d [inch] is the distance between the odd-numbered ejection port group and the even-numbered ejection port group, and v [inch / second] is the main scanning speed of the recording head.

The black ink used in the present embodiment has a Ka value of 1.0 [ml · m ⁻² · msec ^−1/2 ], which is an index of the penetration rate by the Bristow method, and is the same as that of the color ink. The Ka value is 7.0 [ml · m ⁻² · msec ^−1/2 ]. That is, the black ink of the present embodiment has a characteristic that the permeability is lower than that of the color ink.

  The recording method in the present embodiment will be described with reference to FIGS.

  FIG. 11 is a diagram showing three types of thinning patterns that are complementary to each other. FIG. 12 is a diagram for explaining multi-pass printing in a full color mode in which an image in which a color image and a black image are mixed, using the recording head of the present embodiment.

  In FIG. 12, first, in the first scan, among the 12 ejection openings used for ejection of the black head 102Bk, the 25th to 28th are counted from the end of the recording medium opposite to the paper feeding side (the same applies hereinafter). Using the four discharge ports n25 to n28 up to the th, the image (1) of the corresponding scanning region is recorded based on the recording data thinned out by the thinning pattern shown in FIG.

  Subsequently, the recording medium corresponding to 4 dots / 600 dpi is transported in the sub-scanning direction, and in the subsequent second scan, the four ejection ports n21 to n24 of the black head 102Bk are used from the 21st to 24th, as shown in FIG. Based on the recording data thinned out by the thinning pattern shown in (b), the same scanning area as the first scanning is scanned to record the image (1). At this time, the four discharge ports n25 to n28 from the 25th to the 28th used in the scan in which the image (1) of the previous first scan is recorded are thinned by the thinning pattern shown in FIG. It is used for recording a black image (if there is black image data) of the corresponding scanning area based on the drawn recording data.

  In this specification, the distance or length equivalent to (a) dot / (b) dpi is (b) times (a) times the arrangement pitch of the discharge ports arranged at a density of dpi. Refers to distance or length.

  Next, the recording medium corresponding to 4 dots / 600 dpi is transported as in the previous case, and in the subsequent third scan, four discharge ports n17 to n20 from the 17th to the 20th of the black head 102Bk are used. Using the thinning pattern shown in c), the corresponding area is scanned to record the image (1), and the recording of that area is completed. Also in this case, the twenty-first to twenty-fourth outlets n21 to n24 use the thinning pattern in FIG. 11B, and the twenty-fifth to twenty-eighth outlets n25 to n28 11 (a) is used for recording in the corresponding scanning area.

  After the recording of the image (1) is completed by the three scans described above, the recording medium corresponding to 4 dots / 600 dpi is further conveyed in the same manner, and then the fourth scan is performed. In this scanning, the four ejection openings n13 to n16 of the black head correspond to the scanning area in which the image (1) is recorded, but these ejection openings are not set to be used for recording. This scanning area is not recorded. That is, in the present embodiment, the ejection port arrangement relationship between the recording heads of the black ink and the color ink is determined so that one scanning is not performed between the black image recording and the color image recording. Thus, it is possible to provide time for the black ink to be sufficiently fixed. As a result, it is possible to reduce the occurrence of inter-color bleeding that may occur at the boundary with the color image recorded next in the same area.

  In the fourth scan, the 12 ejection ports n17 to n28 used for ejecting the black head in the above scan in which the recording for the scanning area of the black image (1) is not performed are shown in FIGS. The use of the corresponding thinning pattern in c) for recording in the corresponding scanning area is the same as described above.

  When the above four scans are completed, the recording medium corresponding to 4 dots / 600 dpi is transported in the same manner as described above, and printing for the fifth scan is performed. In the printing of the fifth scan, four discharge ports n9 to n12 from the ninth to the twelfth among the 12 discharge ports of the color head 102C are used, and the recording data based on the thinning pattern shown in FIG. The scanning area where the black image (1) exists is scanned, and the color image (2) is recorded adjacent to the black image (1). In this recording, as described above, since the black ink is substantially fixed, the occurrence of bleeding between the adjacent black image and the color image can be reduced.

  In this scanning, among the ejection openings of the black ink head 102Bk, the ejection openings n9 to n12 located at the same positions as the ejection openings n9 to n12 of the color head are not set to be used for recording. Of course, the black ink is not ejected to the scanning area. Of the discharge ports of the black head 102Bk, the 12 discharge ports n17 to n28 that are set to be used for recording use the corresponding thinning patterns (a) to (c), respectively. It is the same as described above to be used for recording an area, and the same applies to each of the following scans.

  Next, after transporting the recording medium corresponding to 4 dots / 600 dpi, in the sixth scan, four discharge ports n5 to n8 of the color head 102C are used, as shown in FIG. The image (2) is recorded based on the recording data by the thinning pattern shown in FIG. At this time, the four ejection ports from the ninth to the twelfth of the color head 102C perform the recording of the corresponding scanning area based on the recording data by the thinning pattern shown in FIG.

  Further, in the seventh scan after the recording medium corresponding to 4 dots / 600 dpi is transported, the four discharge ports n1 to n4 of the color head 102C are used as shown in FIG. The recording of the image (2) is completed based on the recording data by the thinning pattern shown in FIG. At this time, the four discharge ports from the fifth to the eighth use the thinning pattern shown in FIG. 11B, and the four discharge ports from the ninth to the twelfth use the thinning pattern shown in FIG. The same as described above is used for recording corresponding scanning areas based on the respective recording data using.

When the recording method described above is generalized, the first ejection port array (n17 to n28) set to use 102Bk of the black head and the second ejection port array (n1) set to use the color head. ˜n12) are the distances between the feeding-side end portions of the recording medium, respectively, and the conveyance amount of one recording medium is L (equivalent to 4 dots / 600 dpi), and the number of scans necessary to complete a black image is When m (3 times), each is separated by (m + 1) × Ldot / Ndpi (equivalent to (3 + 1) × 4 dots / 600 dpi = 16 dots / 600 dpi in the head configuration shown in FIGS. 8 to 10). This is a recording method using the recording head. With this recording method, even in the multi-pass recording method, it is possible to provide a black ink fixing time for one scan as described above, and it is possible to reduce bleeding between appropriate colors (between black and color). Become. In particular, in the present embodiment, black ink having a low Ka value by the Bristow method, that is, a slow permeation rate, is applied to a recording medium before a color ink having a higher Ka value by the Bristow method, that is, a faster permeation rate. By discharging and recording, penetrability and fixability on the recording medium can be improved, and bleeding between colors can be reduced.

  In this embodiment, the thinning pattern is a fixed pattern as shown in FIG. 11. However, for example, a random thinning pattern may be used to prevent synchronization with image data, and the recording head Different thinning patterns may be used. In the present embodiment, the number of ejection ports of the second ejection port array that ejects color ink is 12 and all ejection ports are used. However, the number of ejection ports of the recording head may be more than that, For example, as shown in FIG. 13, the number of discharge ports of the color ink head is the same as that of the black head, and the second discharge port array set to be used for recording is set to 12 discharge ports from n1 to n12. Also good. The same applies to the black head. In the above embodiment, the number of discharge ports is 28. However, the number of discharge ports is more than or less than that, and the first discharge port array set for use is provided. It is good also as said 12 pieces.

  Furthermore, as described above in general terms, the first ejection port array that ejects black ink and the second ejection port array that ejects color ink are supplied to the recording medium of each ejection port array. In the present embodiment, the distance between the side end portions is a recording medium transport amount L = 4 dots / 600 dpi, and the number of recording scans m = 3 to complete an image with the first recording head that discharges black ink. , (M + 1) × L = (3 + 1) × 4 dots / 600 dpi = 16 dots / 600 dpi, but the application of the present invention is not limited to such a length.

  For example, as shown in FIG. 14, the number of ejection ports of the first ejection port array that ejects black ink is 30, which is longer than (m + 1) × L = 16 dots / 600 dpi, and (m + 2) × L = 20 dots. The length may be equivalent to 18 dots / 600 dpi shorter than / 600 dpi. In this case, the ejection port n12 of the second ejection port array that ejects color ink is used for an image that is completed using the ejection ports n27, n23, and n19 of the first ejection port array that ejects black ink. Since the end of the area to be recorded is shifted by 2 dots / 600 dpi, depending on the image to be recorded, a part of time for two scans is left between the black image recording and the color image recording. A better effect can be obtained by preventing bleeding between black and color.

  According to the above embodiment, by performing the recording control described above, it is possible to record a high-quality image in which bleeding between colors in multi-pass printing is prevented.

(Second Embodiment)
FIG. 15 is a diagram showing the configuration of the ejection opening array in the recording heads of black ink and color ink according to the second embodiment of the present invention.

  The recording head 102Bk that discharges black ink shown in FIG. 15 has (600 dpi) n = 24 discharge ports (24 discharge ports) arranged at a density of N = 600 per inch. Only six of the discharge ports n19 to n24 are used. On the other hand, the recording head 102C that discharges color ink arranges n = 12 discharge ports (12 discharge ports) at a density of N = 600 per inch (600 dpi), and in the full color mode, the discharge ports n1 to n1. All 12 outlets of n12 are used. The positional relationship between the ejection ports (ejection ports) between the recording heads is aligned at the same ejection port number in the sub-scanning direction, and is arranged at a predetermined interval in the main scanning direction. Has been.

  As described in the first embodiment, the black head 102Bk and the color head 102C may be configured as an integrated recording head instead of a separation type, and the ejection ports are not staggered but in a staggered pattern. The color head 102C may have the same number of ejection ports as the first recording head. In addition, the ink used in the present embodiment is an ink having the same permeability as the ink used in the first embodiment.

  The recording method of this embodiment will be described with reference to FIGS. FIG. 16 is a diagram showing two types of thinning patterns that are complementary to each other used in the present embodiment.

  In FIG. 17, first, all six discharge ports n19 to n24 from the 19th to the 24th, which are set to use the black head 102Bk in the first scan, are used, and the scanning areas corresponding to these are scanned and recorded. An image based on the data (1) is recorded. As described above, in the present embodiment, the black image is completely recorded in one scan instead of multipass (hereinafter, this is also referred to as one-pass recording).

  Subsequently, the recording medium is conveyed by an amount equivalent to 6 dots / 600 dpi in the sub-scanning direction. Thereafter, in the second scan, the black head 102Bk discharges in the scan area where the image (1) recorded in the first scan is present. Although the outlets n13 to n18 correspond, these discharge ports are not set to be used, and therefore recording by the black head is not performed in this scanning region. In the scanning region corresponding to the discharge ports n19 to n24 of the black head 102Bk set to be used, one-pass printing is performed using all six discharge ports based on the corresponding print data. It is.

  Further, after carrying the recording medium equivalent to 6 dots / 600 dpi, in the third scan, of the 12 ejection ports set to be used by the color head 102C, the side opposite to the recording medium feeding side Image (1) based on the recording data by the checkered pattern thinning pattern shown in FIG. 16 (a), using the seventh to twelfth discharge ports n7 to n12 counted from the end of the image (same below). The color image (2) is recorded by scanning the scanning area where the image is recorded. During this scanning, the sixteenth to twenty-fourth ejection ports set to be used by the black head 102Bk are used for one-pass printing in the corresponding scanning area.

  Further, after carrying the recording medium corresponding to 6 dots / 600 dpi, in the fourth scan, six discharges from the first to the sixth among the 12 discharge ports set to be used by the color head 102C are used. Using the exits n1 to n6, the region of the color image (2) is scanned based on the recording data by the checkered thinning pattern opposite to the above shown in FIG. 16B, and the recording of the image (2) is completed. . In this scanning, the six ejection ports n7 to n12 from the seventh to the twelfth of the color head perform the recording of the corresponding scanning area based on the recording data by the checkered pattern thinning pattern shown in FIG. The six discharge ports from the 19th to the 24th, which are set to use the black head, record the corresponding scanning area by one-pass printing.

  When the above recording method is generalized, the first ejection port arrays (n19 to n28) for ejecting black ink and the second ejection port arrays (n1 to n12) for ejecting color ink are respectively connected to the respective recording heads. A black image is completed by a recording head that discharges black ink at a distance L (equivalent to 6 dots / 600 dpi) of the recording medium at a distance between discharge port positions at the end of the recording medium in the paper feeding direction. When the number of scans m (1) required for the recording is set to a distance of (m + 1) × L (equivalent to (1 + 1) × 6 dots / 600 dpi = equivalent to 12 dots / 600 dpi), black image recording and color image recording are performed. A time for one scanning can be set between the two, and thereby the fixing of the black ink can be promoted. Thus, a combination of a multi-pass recording method in which a recording head that discharges color ink completes an image in two scans and a one-pass recording method in which a recording head that discharges black ink completes an image in one scan. In this case, it is possible to reduce bleeding.

  In this embodiment, the thinning pattern is a fixed checkered pattern, but a random thinning pattern may be used to prevent synchronization with image data. Further, in this embodiment, the number of ejection ports of the recording head that ejects color ink is 12 and all ejection ports are used. However, ejection ports that have more ejection ports and are used in the multipass recording method are used. The recording head for ejecting black ink may also have 28 ejection ports in the same manner as described above, and the number of ejection ports may be more or less than 1 pass. The above six discharge ports may be used for recording.

  Further, the position of the discharge port at the end of the recording medium in the sheet feeding direction in the second discharge port row that discharges color ink relative to the first discharge port row that discharges black ink is described in the present embodiment. Then, when the conveyance amount L of one recording medium is L = 6 dots / 600 dpi and the number of times of scanning m = 1 to complete an image with a recording head that discharges black ink is (m + 1) × L = (1 + 1) × 6 dots / Although it is assumed that the length corresponding to 600 dpi is equal to 12 dots / 600 dpi, the length is not limited to this.

  For example, the number of ejection ports of the first ejection port array for ejecting black ink as shown in FIG. 18 is 26, which is longer than (m + 1) × L = 12 dots / 600 dpi, and (m + 2) × L = 18 dots / 600 dpi. A shorter length corresponding to 14 dots / 600 dpi may be used. In this case, the recording area using the second ejection port array for ejecting the color ink is shifted by 2 dots / 600 dpi with respect to the image recorded by the first ejection port array for ejecting the black ink. Depending on the image to be recorded, there is a partial scan time between the black image recording and the color image recording, and it is more effective to prevent the blur between the black and color colors. can get.

  Also in the present embodiment, by performing the control described above, it is possible to record a high-quality image that prevents bleeding between colors in multi-pass printing even in combination with 1-pass printing.

(Third embodiment)
FIG. 19 is a diagram showing an ejection port array in each of the recording heads that ejects black ink and color ink according to the third embodiment of the present invention.

  The black head 102Bk of this embodiment arranges n = 24 discharge ports at a density (600 dpi) of N = 600 per inch, but the discharge ports set to be used in the full color mode of this embodiment are There are six discharge ports n1 to n6. The color head 102C has a density of N = 600 per inch (600 dpi) and n = 12 discharge ports, and in the full color mode, all 12 discharge ports n1 to n12. Is used. The positional relationship of the ejection ports between the recording heads is arranged so that the ejection ports n13 to n24 of the black head 102Bk are in the same positions as the ejection ports n1 to n12 of the color head 102C in the sub-scanning direction. On the other hand, the main scanning direction is arranged at a predetermined interval. As described in the first embodiment, the black head and the color head may be configured as an integrated recording head instead of a separate type, and the ejection port arrays are arranged in a staggered pattern instead of one. In addition, the number of ejection openings of the color head may be the same as that of the black head. Further, the ink used in the present embodiment is the same as the ink used in the first embodiment.

  A recording method in the full color mode of the present embodiment will be described with reference to FIGS.

  In FIG. 20, first, among the 12 discharge ports set to be used by the color head 102C in the first scan, 6 discharge ports n7 to n12 from the 7th to the 12th are used, and FIG. The color image (2) is recorded by scanning the corresponding scanning area based on the recording data by the checkered thinning pattern shown in FIG.

  Subsequently, after transporting the recording medium corresponding to 6 dots / 600 dpi in the sub-scanning direction, the first to sixth of the 12 ejection ports set to be used by the color head 102C in the second scanning. Using the six discharge ports, the corresponding scanning area is scanned based on the recording data by the checkered pattern thinning pattern opposite to the above shown in FIG. 16B to complete the recording of the color image (2). . At this time, the seventh to twelfth discharge ports n7 to n12 of the color head are used for recording in the corresponding scanning area based on the recording data by the checkered pattern thinning pattern shown in FIG. Used.

  Further, in the third scan after the recording medium is conveyed by an amount corresponding to 6 dots / 600 dpi, the discharge ports n7 to n12 of the black head 102Bk correspond to the scan area where the image (2) is recorded. Since the ejection port is not set to be used, recording in this scanning area is not performed. In the other scanning areas of the loss, the recording of each scanning area is performed using the 12 ejection openings of the color head 102C.

  Further, in the fourth scan after the recording medium equivalent to 6 dots / 600 dpi is transported, all of the first to sixth discharge ports n1 to n6 set to be used by the black head 102Bk are removed. The corresponding scanning area is scanned and the black image (1) is recorded by one-pass printing. On the other hand, all the 12 ejection openings of the color head 102C are used for printing by scanning each scanning area based on the respective printing data by the thinning pattern.

  As described above, in the present embodiment, in the second ejection port array that ejects color ink, in the first ejection port array that ejects black ink, the discharge at the end of the recording medium on the discharge direction side is performed. When the distance between the respective ejection port arrays with respect to the exit position is set to one transport amount L of the recording medium L = 6 dots / 600 dpi, and the number of scans m = 1 to complete the image by the recording head ejecting black ink, (m + 1) ) × L = (1 + 1) × 6 dots / 600 dpi equivalent = 12 dots / 600 dpi equivalent, so that even when an image is completed with a multi-pass recording with a color head and then an image is completed with a black head, multi-pass recording It is possible to reduce blurring between colors peculiar to the.

  In this embodiment, the thinning pattern is a fixed checkered pattern, but a random thinning pattern may be used to prevent synchronization with image data. In this embodiment, the number of ejection ports of the recording head that ejects color ink is 12 and all ejection ports are used. However, the ejection ports used in multi-pass printing have more ejection ports than the above. The recording head that discharges black ink is also provided with 28 ejection ports, but the ejection ports used in the one-pass recording method have more or less ejection ports. It is good also as six.

  Further, in this embodiment, the distance between the discharge port side ends of the recording medium of the second discharge port array that discharges color ink is set to 1 with respect to the first discharge port array that discharges black ink. When the recording medium transport amount L = 6 dots / 600 dpi and the number of scans m = 1 to complete the image with the recording head that discharges black ink, (m + 1) × L = (1 + 1) × 6 dots / 600 dpi equivalent = 12 dots The length is equivalent to / 600 dpi, but is not limited to this length.

  For example, the number of ejection ports of the first ejection port array for ejecting black ink as shown in FIG. 21 is 26, which is longer than (m + 1) × L = 12 dots / 600 dpi, and (m + 2) × L = 18 dots / 600 dpi. A shorter length corresponding to 14 dots / 600 dpi may be used. In this case, the image end portion completed using the discharge ports n7 and n1 of the recording head that discharges color ink and the image end portion that records using the discharge port n6 of the recording head that discharges black ink are used in this embodiment. Since it deviates by 2 dot / 600 dpi as compared with the form, a better effect can be obtained to prevent the blur between black and color.

  In the present embodiment, by performing the control as described above, even when the image is completed with the black head first and then the image is completed with the black head, it is possible to prevent bleeding between colors in the multipass recording method. An ink jet recording apparatus capable of recording a quality image can be provided.

  In each of the above embodiments, recording with black ink is performed first from the viewpoint of penetrability of each ink, and then recording with color ink is performed. However, the penetrability is within an acceptable range in terms of image quality. For example, the order of use may be reversed. In this case, the configuration of the discharge port arrangement is also exactly the reverse of that described above, that is, the black head has the color head discharge port arrangement and the color head has the black head discharge port arrangement. Also good.

  In each of the above-described embodiments, a time for fixing for one scan or partially for two scans is provided between black image recording and color image recording. Of course, is not limited to this example. When black and color images are recorded by multi-pass printing, the number of scans that can effectively reduce blur between the colors depends on the ink and recording medium used. The number of scans may be determined, and therefore, two or more scans may be performed between black and color image recording. However, considering the length determined by the throughput of the printing apparatus and the number of ejection ports of the printing head, those of the above-described embodiments are preferable.

  As described above, according to the present invention, when so-called multi-pass printing is performed, the discharge at the end on the paper feed side or the discharge side associated with the conveyance of the recording medium is performed for each of the first and second ejection port arrays. The position of the outlet is a length of (m + a) × L (a: positive integer) in the paper discharge or paper feed direction in which the second discharge port row is involved in transporting the recording medium with respect to the first discharge port row. ) A scan in which no recording is performed on the area in which the first image is recorded because it is separated or between the scan for completing the recording of the first image and the first scan for recording the second image Therefore, the image by the first ejection port array and the image by the second ejection port array recorded adjacent to the first ejection port array are recorded with at least one scan. Accordingly, it is possible to provide a time for fixing the ink by the first ejection row on the recording medium.

  As a result, it is possible to record a high-quality image with reduced blur between specific colors that occurs in multi-pass printing.

101 Ink cartridge 102, 10Bk, 102C, 713 Recording head 103 Paper feed roller 104 Auxiliary roller 105 Paper feed roller 106 Carriage 32 Ejection port 33 Ink droplet 700 CPU
701 ROM
702 RAM
703 Image input unit 704 Image signal processing unit 705 Bus line 706 Operation unit 707 Recovery system control circuit 708 Recovery system motor 709 Blade 710 Cap 711 Pump 712 Diode sensor 714 Head temperature control circuit 715 Head drive control circuit 716 Carriage drive control circuit 717 Paper Feed control circuit

Claims (30)

An inkjet recording method for performing recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the sheet feeding side involved in the conveyance of the recording medium is recorded, and the second ejection port array records with respect to the first ejection port array. An ink jet recording method characterized by being separated by a length (m + a) × L (a: a positive integer) in a paper discharge direction related to conveyance of a medium. An inkjet recording method for performing recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the paper discharge side involved in the conveyance of the recording medium is recorded, and the second ejection port array records the first ejection port array. An ink jet recording method characterized by being separated by a length of (m + a) × L (a: a positive integer) in a paper feeding direction related to conveyance of a medium. An inkjet recording method for performing recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the sheet feeding side involved in the conveyance of the recording medium is recorded, and the second ejection port array records with respect to the first ejection port array. An ink jet recording method characterized in that a distance (a: a positive integer) that is larger than (m + a) × L and smaller than (m + a + 1) × L in a paper discharge direction related to conveyance of a medium. An inkjet recording method for performing recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the paper discharge side involved in the conveyance of the recording medium is recorded, and the second ejection port array records the first ejection port array. An ink jet recording method characterized in that a length (a: a positive integer) that is larger than (m + a) × L and smaller than (m + a + 1) × L in a paper feeding direction related to conveyance of a medium.   The amount of conveyance of the recording medium after each of the m scans for completing the image at the first ejection port array, and each of the n scans for completing the image at the second ejection port array The ink jet recording method according to claim 1, wherein the amount of the recording medium conveyed after is equal.   6. The ink jet recording method according to claim 1, wherein a length of the first ejection port array is equal to a length of the second ejection port array.   6. The ink jet recording method according to claim 1, wherein a length of the first ejection port array is different from a length of the second ejection port array.   8. The ink jet recording method according to claim 7, wherein a length of the first ejection port array is longer than a length of the second ejection port array.   9. The ink jet recording method according to claim 1, wherein a Ka value in the Bristow method for the first type of ink is smaller than a Ka value in the Bristow method for the second type of ink.   10. The ink jet recording method according to claim 1, wherein the first type of ink is black ink.   The ink jet recording method according to claim 1, wherein the second type of ink is a color ink.   The inkjet recording method according to claim 11, wherein the color ink is at least one of cyan, magenta, and yellow. The ink jet recording method according to claim 1, wherein m is 2 or more . The inkjet recording method according to claim 1, wherein a is 1 . An ink jet recording method for performing recording by scanning a recording medium having a first ejection port array and a second ejection port array each having a plurality of ejection ports with respect to a recording medium,
Scanning the recording head while discharging the first type of ink from the first discharge port array to perform recording in a predetermined area on the recording medium;
The predetermined recording recorded by the first ejection port array by scanning the recording head while ejecting the second type ink having higher permeability than the first type ink from the second ejection port array. Recording in the area,
Transporting the recording medium by a width of the predetermined area between scanning of the recording head;
A step of scanning the recording head a plurality of times with respect to the predetermined area in at least one of recording with the first ejection port array and recording with the second ejection port array;
The number of scans of the recording head when recording is performed by the first ejection port array and the number of scans of the recording head when recording is performed by the second ejection port array,
A last scan for the predetermined area of the recording head when recording is performed by the first ejection port array, and a first scan for the predetermined area of the recording head when recording is performed by the second ejection port array; An ink jet recording method, wherein scanning of the recording head that does not perform recording is interposed between the recording heads. An inkjet recording apparatus that performs recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the sheet feeding side involved in the conveyance of the recording medium is recorded, and the second ejection port array records with respect to the first ejection port array. An ink jet recording apparatus characterized by being separated by a length of (m + a) × L (a: a positive integer) in a paper discharge direction related to conveyance of a medium. An inkjet recording apparatus that performs recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the paper discharge side involved in the conveyance of the recording medium is recorded, and the second ejection port array records the first ejection port array. An ink jet recording apparatus characterized in that a distance of (m + a) × L (a: a positive integer) is separated in a paper feeding direction related to conveyance of a medium. An inkjet recording apparatus that performs recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the sheet feeding side involved in the conveyance of the recording medium is recorded, and the second ejection port array records with respect to the first ejection port array. An ink jet recording apparatus having a length (a: positive integer) that is larger than (m + a) × L and smaller than (m + a + 1) × L in a paper discharge direction related to conveyance of a medium. An inkjet recording apparatus that performs recording by discharging ink while scanning a recording head relative to a recording medium,
The recording head includes a first ejection port array for ejecting a first type of ink and a second for ejecting a second type of ink having higher permeability than the first type of ink. Arranging the ejection port array in a direction different from the scanning direction;
The number of scans for a predetermined area on the recording medium for completing an image at the first discharge port array is m (m: a positive integer), and an image is completed at the second discharge port array . The number of scans for the predetermined region is n (n: positive integer, m and n are different), and at least one of m and n is 2 or more, and the direction of the scan for each scan Recording is performed with L (L: positive number) as the conveyance amount for conveying the recording medium in a direction different from
For each of the first and second ejection port arrays, the position of the ejection port at the end of the paper discharge side involved in the conveyance of the recording medium is recorded, and the second ejection port array records the first ejection port array. An ink jet recording apparatus having a length (a: positive integer) that is larger than (m + a) × L and smaller than (m + a + 1) × L in a paper feeding direction related to conveyance of a medium. The amount of conveyance of the recording medium after each of the m scans for completing the image at the first ejection port array, and each of the n scans for completing the image at the second ejection port array The inkjet recording apparatus according to claim 16, wherein the amount of the recording medium conveyed after is equal. 21. The inkjet recording apparatus according to claim 16 , wherein a length of the first ejection port array is equal to a length of the second ejection port array. 21. The inkjet recording apparatus according to claim 16 , wherein a length of the first ejection port array is different from a length of the second ejection port array. 23. The ink jet recording apparatus according to claim 22 , wherein a length of the first ejection port array is longer than a length of the second ejection port array. 24. The ink jet recording apparatus according to claim 16, wherein a Ka value in the Bristow method for the first type of ink is smaller than a Ka value in the Bristow method for the second type of ink. 25. The inkjet recording apparatus according to claim 16, wherein the first type of ink is black ink. 26. The ink jet recording apparatus according to claim 19, wherein the second type of ink is a color ink. 27. The ink jet recording apparatus according to claim 26 , wherein the color ink is at least one of cyan, magenta, and yellow. 28. The ink jet recording apparatus according to claim 16, wherein m is 2 or more . 29. The ink jet recording apparatus according to claim 16, wherein a is 1 . An ink jet recording apparatus that performs recording by scanning a recording medium having a first ejection port array and a second ejection port array each having a plurality of ejection ports, with respect to a recording medium,
Scanning the recording head while discharging the first type of ink from the first discharge port array to perform recording in a predetermined area on the recording medium;
The predetermined recording recorded by the first ejection port array by scanning the recording head while ejecting the second type ink having higher permeability than the first type ink from the second ejection port array. Recording in the area,
Transporting the recording medium by a width of the predetermined area between scanning of the recording head;
A step of scanning the recording head a plurality of times with respect to the predetermined area in at least one of recording with the first ejection port array and recording with the second ejection port array;
The number of scans of the recording head when recording is performed by the first ejection port array and the number of scans of the recording head when recording is performed by the second ejection port array,
A last scan for the predetermined area of the recording head when recording is performed by the first ejection port array, and a first scan for the predetermined area of the recording head when recording is performed by the second ejection port array; An ink jet recording apparatus characterized by interposing a scan of the recording head that does not perform recording.

Images