JP3667071B2 - Ink jet recording apparatus and recording processing liquid print data generation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink jet recording apparatus that performs recording by ejecting ink droplets toward a recording medium, and in particular, an ink jet recording apparatus that ejects a recording processing liquid immediately before or after ejection of ink droplets and recording processing liquid print data. It relates to a generation method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an ink jet recording apparatus has been developed in which recording is performed by discharging recording liquid droplets from a discharge port (orifice) at the tip of a nozzle liquid passage.
[0003]
Recently, in particular, in order to print a high-quality image, a method of printing a recording treatment liquid on a recording medium immediately before printing a recording liquid (ink) or immediately after printing has been taken. This recording processing liquid is colorless and transparent. The recording processing liquid and the recording liquid are printed on top of each other, mixed on the recording medium before the two liquids are absorbed by the recording medium, and fixed on the recording medium. By applying this method, the color developability, water resistance and bleeding (bleeding) of the recording liquid to the recording medium are improved. In particular, when the recording medium is ordinary plain paper that is not coated with an ink-receiving layer, printing (printing) without bleeding is possible, and the effect is great. As described above, when printing on ordinary plain paper by the ink jet method, the bleeding of the recording liquid due to the fiber of the paper has been a problem. To solve these problems, the various recording processing liquids described above have been developed. ing.
[0004]
With reference to FIG. 5, an outline of conventional printing using a recording processing liquid will be described. In FIG. 5, printing is performed on the recording paper 6 by scanning the recording head 2 in the direction of the arrow in the figure. The recording head 2 includes two nozzle rows 1a and 1b. The nozzle 1a discharges ink and the nozzle 1b discharges a recording processing liquid. When the recording head 2 starts scanning, the nozzle 1b first discharges the recording processing liquid to form the dots 4b on the recording paper 6, and then the ink is discharged from the nozzles 1a to form the dots 4a. At this time, the recording processing liquid is colorless and transparent, and actually does not look like FIG. As a result, no bleeding occurs at the boundary 3 between the print area 5 and the non-print area due to the effect of the recording processing liquid, and at the same time, water resistance and color development are improved.
[0005]
In this case, the recording processing liquid is printed only 50% with respect to the ink dots. This is supported by the results of an experiment using the recording processing liquid and recording head that we have developed. It is not necessary to print the recording processing liquid on every ink dot, and it is effective at about 50%. Therefore, in order to prevent wasted recording processing liquid from being wasted, such a printing method is employed.
[0006]
It is preferable that the printing ratio (thinning rate) of the recording processing liquid is changed depending on the ejection amount of one dot of the ink dots and the recording processing liquid, the type of ink (black and color, etc.) and the composition of the ink and the recording processing liquid.
[0007]
Recently, multi-pass printing has been performed to further improve the printing quality. To explain this, for example, when there is [a] print data (original print data) as shown in FIG. 6, the print data is divided into a plurality as shown in [b] and [c], and [b], The image shown in [c] is formed by a plurality of recording head scans using different nozzles (however, FIG. 6 shows two-pass multi-pass). Accordingly, it is possible to reduce paper feed unevenness due to variations in the paper feed amount and unevenness due to a difference in discharge amount between nozzles of the recording head.
[0008]
[Problems to be solved by the invention]
However, as shown in FIG. 5, when printing is performed by thinning out the recording processing liquid, if the multi-pass as shown in FIG. 6 is performed, the printing ratio of the recording processing liquid differs depending on the scanning in the prior art. As a result, density unevenness occurred despite the multipass.
[0009]
FIG. 7 is a flowchart showing a process of creating print data during multi-pass of a conventional recording processing liquid, and FIG. 6 is a schematic diagram of creating print data of the recording processing liquid according to the flow. Next, description will be made with reference to FIGS.
[0010]
In FIG. 7, the image data sent from the host computer (not shown) is converted into print data by the image conversion driver S21 and stored in the print data memory S22. The print data corresponds to the original print data [a] in FIG. The print data stored in the print data memory S22 is sent to the recording processing liquid calculation driver S23 and the multipass conversion driver S24, respectively, for conversion into recording processing liquid data and recording liquid data.
[0011]
The print data sent to the recording processing liquid calculation driver S23 is calculated to be converted into recording processing liquid data, and stored in the print data memory S25 as recording processing liquid print data. In the example of FIG. 6, the calculation of 50% thinning is executed, which corresponds to the recording processing liquid print data of [d] in FIG.
[0012]
On the other hand, the print data sent to the multi-pass conversion driver S24 is converted into print data of the recording liquid in each scan, and stored in the print data memory S25 as print data for the first scan and print data for the second scan. In the example of FIG. 6, it corresponds to the first scan print data and the second scan print data of [b] and [c] of FIG.
[0013]
Thus, the print data converted into each is sent to the recording liquid recording head S27 and the recording liquid recording head S28 according to each scan, and printing is executed.
[0014]
The print data of the recording processing liquid is obtained by performing AND (addition) of the recording processing liquid print data and the recording liquid printing data in each scan for each scan by the AND circuit S26. Is sent to the recording head S27.
[0015]
At this time, depending on the conversion methods of the recording processing liquid arithmetic driver S23 and the multipass conversion triber S24, there is a bias in the data of the recording processing liquid during each scan. FIG. 6 shows this most prominent case. In FIG. 6, first, the print data for the recording processing liquid is obtained by adding the recording processing liquid printing data [d] and the first scanning printing data [b] in the first scan to obtain the recording processing liquid [e]. Print data for the first scan is generated. However, [e] has no print data at all. Next, in the second scan, the recording process liquid print data of [d] and the second scan print data of [c] are added to generate the print processing liquid first scan print data of [f]. However, [f] is exactly the same as the print data of [d]. This is because the recording processing liquid calculation driver S23 in FIG. 7 generates the recording processing liquid printing data [d] from the printing data [a], and the printing data [b] and [c] from the printing data [a]. This occurs because the conversion method of the multipath conversion driver S24 in FIG.
[0016]
Thus, bleeding and density unevenness have occurred due to the difference in the printing ratio of the recording processing liquid in each scan. In particular, the bleeding and density unevenness are conspicuous at the time of multipass. Even though multipass is performed, density unevenness having a bandwidth greater than the recording paper feed amount by multipass occurs.
[0017]
As one of the countermeasures, the recording processing liquid calculation driver has been falsified and the multi-pass conversion driver has been improved. However, the above-mentioned bleeding and density unevenness are phenomena that are always caused by a certain pattern. It was not an appropriate measure.
[0018]
As a second countermeasure, the print processing liquid printing ratio (thinning rate) has been reduced to 100% by changing the composition of the recording processing liquid or reducing the discharge amount of one dot of the recording processing liquid. However, by changing the composition of the recording processing liquid, other characteristics such as water resistance may be reduced, and there is a limit to reducing the discharge amount of one dot of the recording processing liquid. This measure was also insufficient, with occasional difficulties.
[0019]
On the other hand, in recent years, high-quality printers have been increasingly demanded, and the occurrence of such printing unevenness has become a very important issue to be solved in terms of performance improvement. In addition, this is very important in considering bleeding prevention, water resistance, and color developability by the recording processing solution, and improvement of its usage technique is required.
[0020]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and an ink jet recording apparatus and recording processing liquid print data generation that prevent printing deterioration such as bleeding and density unevenness caused by different printing processing liquid printing ratios in each scan. It is to provide a method.
[0021]
[Means for Solving the Problems]
  In order to achieve the above object, a first aspect of the apparatus of the present invention is a recording liquid from a recording head.andAn ink jet recording apparatus that performs recording by discharging droplets of a recording processing liquid, and generates recording liquid print data for each scan by dividing the print data of the recording liquid into print data for each scan Print data generating means, means for discharging recording liquid from the recording head in each scan based on recording liquid print data for each scan generated by the recording liquid print data generating means, and the recording liquid print data Based on the recording liquid printing data for each scan generated by the generating means, the recording processing liquid print data generating means for generating the recording processing liquid printing data for each scanning, and the recording processing liquid print data generating means. Means for discharging the recording processing liquid from the recording head in each scanning based on the recording liquid printing data for each scanning, and the recording processing liquid printing data. Data generating means, said predetermined from the respective recording liquid for printing data of each scanthe sameA part of the print data is taken out at a rate, and the print data for the recording processing liquid of each scan is generated by making the taken out print data into print data for the recording processing liquid of each scan.
[0022]
  In order to achieve the above object, according to a second aspect of the apparatus of the present invention, a recording head having a nozzle for discharging a recording liquid and a nozzle for discharging a recording processing liquid is scanned with respect to the recording medium. An inkjet recording apparatus that performs recording by discharging a recording liquid and a recording processing liquid from a recording liquid in a multipass printing mode in which recording on the same area on the recording medium is completed by a plurality of scans of the recording head. Means for dividing the print data for recording liquid into at least the recording liquid print data for the first scan and the recording liquid print data for the second scan, and at a predetermined ratio determined in advance from the recording liquid print data for the first scan. The print data of the first scan is taken out, the print data taken out is set as print data for the recording processing liquid in the first scan, and the second scan recorded in the first step is set. Means for extracting a part of the print data from the liquid print data at the predetermined ratio and setting the extracted print data as the print data of the recording processing liquid for the recording liquid in the second scan. .
[0027]
  In order to achieve the above object, a first aspect of the method of the present invention is a recording liquid from a recording head.andA method of generating print data of a recording processing liquid used in an ink jet recording apparatus that performs recording by discharging droplets of the recording processing liquid, and the printing data of the recording liquid is printed in each multi-pass printing mode And the print data of the recording liquid in each scan generated in the first step is determined in advance.the sameA second step of generating print data of the recording processing liquid for each scan by taking out part of the print data at a ratio and making each of the extracted print data print data of the recording processing liquid for each scan; Based on the print data of the recording liquid in each scan generated in the first step, the third step of discharging the recording liquid from the recording head in each of the scans, and each of the scans generated in the second step And a fourth step of discharging the recording processing liquid from the recording head in each of the scans based on the printing data of the recording processing liquid.
[0028]
  Here, in the second step, a plurality of types of numerical values corresponding to the predetermined ratio are assigned to the print data of the recording liquid in the respective scans, and print data having different numerical values in the respective scans are taken out.be able to.
[0029]
  To achieve the above object, the second aspect of the method of the present inventionIsUsed in an ink jet recording method in which recording is performed by discharging a recording liquid and a recording processing liquid from the recording head while a recording head having a nozzle for discharging the recording liquid and a nozzle for discharging a recording processing liquid is scanned with respect to the recording medium. In the multi-pass printing mode in which recording on the same area on the recording medium is completed by a plurality of scans of the recording head, at least the recording liquid printing data is generated. The first step of dividing the recording liquid printing data for one scan and the recording liquid printing data for the second scan, and the recording liquid printing data for the first scan generated in the first step are predetermined. A part of the print data is taken out at a predetermined ratio, and the taken out print data is set as the print data for the recording processing liquid in the first scan, and the first scan data is set. A part of the print data is taken out from the print data for the recording liquid for the second scan generated in the above-mentioned ratio, and the taken out print data is set as the print data for the recording liquid for the recording liquid for the second scan. By doing so, there is provided a second step of generating print data for recording processing liquid of the first and second scans.
[0031]
The present invention eliminates a bias in the printing ratio (thinning rate) of the recording processing liquid at each scanning by generating the recording processing liquid printing data at each scanning from the printing data of the recording liquid (ink). As a result, it is possible to prevent print deterioration caused by the above.
[0032]
Further, in the present invention, in multi-pass printing, print data of the recording processing liquid for each of the multi-pass scans is generated from the print data of the recording liquid for each of the multi-pass scans. Since an uneven print ratio (thinning rate) of the recording processing liquid is eliminated, it is possible to prevent printing deterioration such as bleeding and density unevenness during multi-pass printing.
[0033]
Further, the present invention generates data of recording processing liquid by thinning data from printing data of the recording liquid at each scanning at a certain ratio (thinning rate), and mixes the recording liquid and the recording processing liquid at an optimum ratio. Therefore, the effect of the recording processing liquid can be maximized.
[0034]
Further, according to the present invention, the effect of the recording processing liquid can be maximized by optimizing the thinning rate with black ink or other color ink.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0036]
FIG. 2 schematically shows a configuration example of a printer unit in an embodiment of the ink jet recording apparatus of the present invention. In FIG. 2, reference numeral 11 denotes a head cartridge having an ink jet recording head portion 19 on which an ink tank 12 can be mounted. Reference numeral 13 denotes an arrow X in FIG. A carriage for scanning in the head scanning direction indicated by.
[0037]
A schematic view of the recording head portion 19 as viewed from below is shown in FIG. As shown in FIG. 3, the recording head unit 19 has two nozzle (discharge port) rows 19a and 19b, 19a is a nozzle row that discharges the recording processing liquid, and 19b discharges the recording liquid (ink). This is a nozzle row. In the present embodiment, there are two head cartridges shown in FIGS. 3A and 3B, and the cartridge of FIG. 3A receives Bk (black) ink from the nozzle row 19b, and (b) ) Cartridge can eject three colors of Y (yellow), M (magenta), and C (cyan) from the nozzle arrays 19b1, 19b2, and 19b3. By using them properly, both documents and color graphics can be printed.
[0038]
In the present embodiment, such a configuration is used. However, in the present invention, such a carriage or head configuration may not be used, and a carriage that can simultaneously mount two or more head cartridges may be used. A head cartridge having one nozzle row per l color may be used, or a head cartridge having a plurality of nozzle rows may be used.
[0039]
Reference numeral 16 denotes a recording medium, and reference numeral 14 denotes a conveyance roller for conveying the recording medium 16 in the recording paper conveyance direction indicated by an arrow Y in FIG. As described above, since the recording head unit 19 is not moved in the head scanning direction X, the head scanning for performing recording by discharging the recording processing liquid or ink from the nozzle row and the conveyance of the recording medium are performed. By alternately performing recording, it is possible to perform recording printing on the entire recording medium.
[0040]
Reference numeral 18 denotes a cap formed of an elastic material such as rubber facing the discharge port forming surface of the recording head at the home position, and is supported so as to be able to come into contact with / detach from the recording head. The cap 18 protects the recording head at the time of non-recording, removes the fixed recording processing liquid or ink, or accumulates in a nozzle or a liquid chamber (a space in the recording head for storing ink during ejection). In order to remove the bubbles, the ink is forcibly sucked and discharged by a suction pump (not shown). In this embodiment, since the head for discharging the recording processing liquid and ink is used, the cap 18 is divided into l8a and 18b in order to suck and recover the recording processing liquid and ink, respectively. Since the recording processing liquid and the ink are fixed as soon as they are mixed and cannot be removed, such a divided structure is adopted.
[0041]
Reference numeral 17 denotes an ink discharge port for an ejection recovery operation in the ink ejection recovery process. In the ejection recovery process, the ejection port forming surface is opposed to the ink ejection port 17 and the ink is ejected from the nozzle row 19b to forcibly cause bubbles, dust, thickened ink, etc. It is a process to discharge automatically.
[0042]
FIG. 1 is a flowchart showing a print data creation process during multi-pass of a recording processing liquid according to an embodiment of the present invention. FIG. 4 shows a processing process when creating print data of a recording processing liquid according to the flow. It is a schematic diagram shown. Next, the operation of this embodiment will be described with reference to FIGS.
[0043]
In FIG. 1, in the present embodiment, the image conversion driver S11 is a software program, the multi-pass conversion driver S12 and the recording processing liquid arithmetic driver S14 are print control ROMs (read) mounted on the printer body. This is a program written in (only memory) (not shown). The print data memory S13 is a data buffer in the printer. However, if such a function can be realized, this configuration is not affected. All the drivers may be executed on software, and the RAM of the host computer may be used as the print memory.
[0044]
First, in FIG. 1, image data sent from a host computer (not shown) such as a personal computer is converted into print data by an image conversion driver S11. This print data corresponds to the original print data [a] in FIG. The converted print data is sent to the multi-pass conversion driver Sl2, converted into print data of the recording liquid in each scan, and stored in the print data memory S13 as print data for the first scan and print data for the second scan. . In FIG. 4, it corresponds to the first scan print data and the second scan print data [b] and [c].
[0045]
The converted print data is sent to the recording liquid recording head S15 and the recording liquid recording head S16 according to each scan, and printing is executed.
[0046]
The print data of the recording process liquid is obtained by calculating and processing the print data for the first scan and the print data for the second scan stored in the print data memory S13 by the recording process calculation driver S14. Sent to. A calculation example of the recording processing liquid calculation driver S14 will be described with reference to FIG.
[0047]
In FIG. 4, first, for each individual data of the first scan print data, a numerical value corresponding to the print ratio (thinning rate) of the recording processing liquid (in the case of FIG. Numbering from (1) to the number corresponding to (▼). At this time, if there is print data in the surrounding data when (1) is numbered, the surrounding data other than the print data in the next raster direction is set to (2). Repeat this sequentially.
[0048]
Next, only the data (1) of the numbering is taken out as data of the recording processing liquid. As a result, 50% thinning is executed from the data shown in FIG. 4B, and print data for the first scan of the recording treatment liquid [g] is generated.
[0049]
As described above, the data around the number {circle around (1)} is set to {circle around (2)} for the effect of scattering the data of the recording processing liquid as much as possible.
[0050]
The numerical value corresponding to the printing ratio (thinning rate) of the recording processing liquid may be set so that predetermined thinning can be performed by extracting some data from the numbered numerical values. For example, if the decimation rate is 25%, numbering up to {circle over (4)} can be used for each scan, and if the decimation rate is 33%, numbering up to {circle over (3)}. One data is used for each scan.
[0051]
In addition, when the thinning rate exceeds 50%, for example, when the thinning rate is 66%, it is only necessary to number up to (3) and use two of the data for each scan, and when the thinning rate is 75%. , (4) are numbered, and three of these data may be used for each scan.
[0052]
In this way, print data for the first scan is calculated and sent to the recording processing liquid recording head S15, and printing is executed. At the same time, print data for the first scan is sent to the recording liquid recording head S16, and printing is executed. Next, print data for the second scan is calculated in the same manner. In FIG. 4, 50% thinning is executed from the data [c] in FIG. In the example of FIG. 4, the print data of the numbering (2) is taken out as the data of the recording processing liquid for the printing data of the second scan. This also has the effect of scattering the data of the recording processing liquid as much as possible. Done for. Similarly, it is sent to the recording processing liquid recording head S15, and printing is executed. At the same time, the print data of the second scan is also sent to the recording liquid recording head S16, and printing is executed.
[0053]
The print data of the recording processing liquid obtained in this way is free from bias in the print data of the first and second scans, and can prevent bleeding and density unevenness during multi-pass. By mixing at an optimum ratio of the recording processing liquid, the effect of the recording processing liquid can be maximized. Further, by optimizing the thinning rate with black ink or other color ink, the effect of the recording processing liquid can be maximized.
[0054]
(Other)
The present invention includes means (for example, an electrothermal converter, a laser beam, etc.) that generates thermal energy as energy used for ejecting ink, particularly in the ink jet recording system, and the ink is generated by the thermal energy. In the recording head and the recording apparatus of the type that causes the state change, excellent effects are brought about. This is because such a system can achieve high recording density and high definition.
[0055]
As for the typical configuration and principle, for example, those performed using the basic principle disclosed in US Pat. Nos. 4,723,129 and 4,740,796 are preferable. This method can be applied to both the so-called on-demand type and the continuous type. In particular, in the case of the on-demand type, it is arranged corresponding to the sheet or liquid path holding the liquid (ink). By applying at least one drive signal corresponding to the recorded information and applying a rapid temperature rise exceeding nucleate boiling to the electrothermal transducer, the thermal energy is generated in the electrothermal transducer, and the recording head This is effective because film boiling occurs on the heat acting surface of the liquid and, as a result, bubbles in the liquid (ink) corresponding one-to-one with the drive signal can be formed. By the growth and contraction of the bubbles, liquid (ink) is ejected through the ejection opening to form at least one droplet. It is more preferable that the drive signal has a pulse shape, since the bubble growth and contraction is performed immediately and appropriately, and thus it is possible to achieve discharge of a liquid (ink) having particularly excellent responsiveness. As this pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further excellent recording can be performed by employing the conditions described in US Pat. No. 4,313,124 of the invention relating to the temperature rise rate of the heat acting surface.
[0056]
As the configuration of the recording head, in addition to the combination configuration (straight liquid channel or right angle liquid channel) of the discharge port, the liquid channel, and the electrothermal transducer as disclosed in each of the above-mentioned specifications, the heat acting part The configurations using US Pat. No. 4,558,333 and US Pat. No. 4,459,600, which disclose the configuration in which the lens is disposed in the bending region, are also included in the present invention. In addition, for a plurality of electrothermal transducers, Japanese Patent Application Laid-Open No. Sho 59-123670 that discloses a configuration in which a common slit is used as a discharge portion of the electrothermal transducer or an aperture that absorbs pressure waves of thermal energy is provided. The effect of the present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 59-138461 which discloses a configuration corresponding to the discharge unit. That is, whatever the form of the recording head is, according to the present invention, recording can be performed reliably and efficiently.
[0057]
Furthermore, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium that can be recorded by the recording apparatus. As such a recording head, either a configuration satisfying the length by a combination of a plurality of recording heads or a configuration as a single recording head formed integrally may be used.
[0058]
In addition, even the serial type as shown in the above example can be connected to the main body of the recording head or attached to the main body of the device so that electrical connection with the main body of the device and ink supply from the main body are possible. The present invention is also effective when a replaceable chip type recording head or a cartridge type recording head in which an ink tank is integrally provided in the recording head itself is used.
[0059]
In addition, it is preferable to add a recording head ejection recovery means, a preliminary auxiliary means, and the like as the configuration of the recording apparatus of the present invention, since the effects of the present invention can be further stabilized. Specifically, heating is performed using a capping unit, a cleaning unit, a pressurizing or suction unit, an electrothermal transducer, a heating element different from this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.
[0060]
Also, regarding the type or number of recording heads to be mounted, for example, a plurality of recording heads are provided corresponding to a plurality of inks having different recording colors and densities, in addition to one provided corresponding to a single color ink. May be used. That is, for example, as a recording mode of the recording apparatus, not only a recording mode of only a mainstream color such as black, but also a recording head may be configured integrally or by a combination of a plurality of different colors, Alternatively, the present invention is extremely effective for an apparatus having at least one of full-color recording modes by color mixing.
[0061]
In addition, in the embodiments of the present invention described above, the ink is described as a liquid. However, ink that is solidified at room temperature or lower and that softens or liquefies at room temperature may be used. In the ink jet method, the temperature of the ink itself is generally adjusted within a range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that it is in the stable discharge range. A liquid material may be used. In addition, it is solidified and heated in an untreated state in order to actively prevent the temperature rise caused by thermal energy from being used as the energy for changing the state of the ink from the solid state to the liquid state, or to prevent the ink from evaporating. You may use the ink which liquefies by. In any case, by applying thermal energy according to the application of thermal energy according to the recording signal, the ink is liquefied and liquid ink is ejected, or when it reaches the recording medium, it already starts to solidify. The present invention can also be applied to the case of using ink having the property of liquefying for the first time. The ink in such a case is in a state of being held as a liquid or a solid in a porous sheet recess or through-hole as described in JP-A-54-56847 or JP-A-60-71260. Alternatively, the electrothermal converter may be opposed to the electrothermal converter. In the present invention, the most effective one for each of the above-described inks is to execute the above-described film boiling method.
[0062]
In addition, the ink jet recording apparatus of the present invention may be used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmission / reception function. It may be a thing.
[0063]
Note that the present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, and a printer), and a device (for example, a copying machine and a facsimile device) including a single device. You may apply to.
[0064]
Another object of the present invention is to supply a recording medium (storage medium) on which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or apparatus, and the computer (or CPU) of the system or apparatus Needless to say, this can also be achieved by reading and executing the program code stored in the recording medium.
[0065]
In this case, the program code itself read from the recording medium realizes the functions of the above-described embodiment, and the recording medium on which the program code is recorded constitutes the present invention.
[0066]
Recording media for recording the program code and variable data such as tables include, for example, floppy disks (FD), hard disks, optical disks, magneto-optical disks, CD-ROMs, CD-Rs, magnetic tapes, nonvolatile tapes, etc. A memory card (IC memory card), ROM, or the like can be used.
[0067]
Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. Needless to say, a case where the functions of the above-described embodiment are realized by performing part or all of the actual processing and the processing by the processing.
[0068]
【The invention's effect】
As is clear from the above description, according to the present invention, it is possible to eliminate the unevenness of the printing ratio (thinning rate) of the recording processing liquid during each scan, and bleeding due to the deviation, density unevenness in multipass printing, and the like. Printing deterioration can be prevented.
[0069]
Further, according to the present invention, there is no need for a data memory for recording processing liquid print data, and only the recording liquid printing data transmission system can be used up to the recording processing liquid calculation driver, and an AND circuit or the like is not required. This also simplifies the circuit and reduces costs.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a print data creation process during multi-pass of a recording processing liquid according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram illustrating a configuration example of a printer unit in an embodiment of an ink jet recording head according to the present invention.
FIG. 3 is a schematic view of the ink jet recording head of the present invention as viewed from below (from the nozzle side).
FIG. 4 is a schematic diagram showing a processing process when print data of a recording processing liquid is generated according to print data generation means at the time of multi-pass of a recording processing liquid according to an embodiment of the present invention.
FIG. 5 is a schematic diagram illustrating an example of printing using a recording processing liquid in a conventional example.
FIG. 6 is a schematic diagram showing a processing process when print data of a recording processing liquid is generated according to print data generation means at the time of multi-pass of the recording processing liquid in a conventional example.
FIG. 7 is a flowchart showing a process of creating print data at the time of multi-pass of a recording processing liquid in a conventional example.
[Explanation of symbols]
1a Nozzle (ink)
1b Nozzle (recording processing liquid)
2 Record Head
3 Print area boundary
4a Print dots (ink)
4b Print dots (recording solution)
5 Print area
6 Recording paper
11 Head cartridge
12a Ink tank (for recording processing liquid)
12b Ink tank (for ink)
13 Carriage
14 Transport roller
15 Guide shaft
16 Recording media
17 Ink outlet
18 cap
18a Recording processing liquid suction part
18b Ink suction part
19 Recording head
19a Nozzle array (recording processing liquid)
19b Nozzle row (ink)

Claims (5)

An inkjet recording apparatus that performs recording by discharging droplets of a recording liquid and a recording processing liquid from a recording head,
Recording liquid print data generating means for generating recording liquid print data for each scan by dividing the print data of the recording liquid into print data for each scan;
Means for discharging recording liquid from the recording head in each scan based on the recording liquid print data for each scan generated by the recording liquid print data generating means;
Recording processing liquid print data generating means for generating recording liquid printing data for each scan based on recording liquid printing data for each scan generated by the recording liquid print data generating means;
Means for discharging the recording processing liquid from the recording head in each scan based on the recording liquid printing data for each scanning generated by the recording processing liquid print data generating means;
The recording processing liquid print data generating means extracts a part of the printing data from the recording liquid printing data for each scan at the same predetermined ratio, and uses the extracted printing data for the recording processing liquid for each scan. An ink jet recording apparatus that generates print data for recording processing liquid for each scan by using print data. An ink jet recording apparatus that performs recording by discharging a recording liquid and a recording processing liquid from the recording head while scanning a recording medium having a nozzle for discharging the recording liquid and a nozzle for discharging a recording processing liquid. There,
In a multi-pass printing mode in which recording on the same area on the recording medium is completed by a plurality of scans of the recording head, the recording liquid print data is at least the first scanning recording liquid printing data and the second scanning recording liquid. Means for dividing the print data for printing,
A part of the print data is taken out from the print data for the recording liquid in the first scan at a predetermined ratio, the taken out print data is set as the print data for the recording processing liquid in the first scan, and the first A part of the print data is extracted from the print data for the second scanning recording liquid generated in step 1 at the predetermined ratio, and the extracted print data is used as the print data for the recording processing liquid for the second scanning recording liquid. Means for setting;
An ink jet recording apparatus comprising: A method of generating print data of a recording processing liquid used in an ink jet recording apparatus that performs recording by discharging droplets of a recording liquid and a recording processing liquid from a recording head,
A first step of dividing the print data of the recording liquid into print data for each scan in the multi-pass print mode;
A part of the print data is taken out at the same predetermined ratio from the print data of the recording liquid in each scan generated in the first step, and the print data of the print processing liquid in each scan is taken out each of the taken out print data A second step of generating print data of the recording processing liquid for each scan;
A third step of discharging the recording liquid from the recording head in each of the scans based on the print data of the recording liquid in each of the scans generated in the first step;
A fourth step of ejecting the recording processing liquid from the recording head in each of the scans based on the print data of the recording processing liquid in each of the scans generated in the second step;
A recording processing liquid print data generation method characterized by comprising: In the second step, a plurality of types of numerical values corresponding to the predetermined ratio are attached to the print data of the recording liquid in the respective scans, and the print data with different numerical values in the respective scans are taken out. The recording processing liquid print data generation method according to claim 3. Used in an ink jet recording method in which recording is performed by discharging a recording liquid and a recording processing liquid from the recording head while a recording head having a nozzle for discharging the recording liquid and a nozzle for discharging a recording processing liquid is scanned with respect to the recording medium. A method for generating print data for a recording processing liquid, comprising:
Recording on the same area on the recording medium is completed by a plurality of scans of the recording head. A first step of dividing the recording liquid print data into at least a first scanning recording liquid printing data and a second scanning recording liquid printing data in the multi-pass printing mode;
A part of the print data is taken out from the print data for the recording liquid for the first scan generated in the first step at a predetermined ratio, and the print data for the recording liquid for the first scan is taken out. A portion of the print data is extracted at the predetermined ratio from the print data for the second scanning recording liquid generated in the first step, and the extracted printing data is used as the recording liquid for the second scanning. A second step of generating print data for the recording processing liquid of the first and second scans by setting the print data of the recording processing liquid for use;
A recording processing liquid print data generation method characterized by comprising:

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