JP6131896B2 - Inkjet recording apparatus and program - Google Patents

Description

  The present invention relates to an ink jet recording apparatus capable of so-called borderless printing.

  Conventionally, an ink jet recording apparatus having a function of recording an image on the entire surface of a sheet (hereinafter also referred to as “marginless printing”) is known. In addition, in marginless printing, an image including a sheet area that is the same as the sheet size and a protruding area outside the sheet area is recorded on the sheet, thereby suppressing the occurrence of blanks on the sheet due to sheet conveyance errors and skew feeding. There is also an ink jet recording apparatus.

  In recent years, ink droplets ejected from an ink jet recording apparatus have been miniaturized for the purpose of improving image recording quality. In the above-described borderless printing, if these fine ink droplets are ejected toward the protruding region, the ink droplets may be misted and attached to the periphery before reaching the platen at a position farther from the sheet. Thus, for example, Patent Document 1 discloses an ink jet recording apparatus that ejects small-sized ink droplets toward a sheet region and ejects large-sized ink droplets toward a protruding region.

Japanese Patent Laid-Open No. 2005-22404

  As an application example of borderless printing, for example, a case where an image is recorded on the entire communication surface of a postcard can be considered. In the application example described above, the user may perform test printing on a sheet having a size larger than the postcard before executing borderless printing on the actual postcard. However, in the inkjet recording apparatus described in Patent Document 1, when borderless printing is performed on a sheet having a size larger than the sheet area, the boundary between the sheet area and the protruding area is conspicuous due to the difference in ink droplet size. There is a possibility.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide ink droplets of an appropriate size according to the size of an image and the size of a sheet on which the image is recorded in so-called borderless printing. Another object of the present invention is to provide an ink jet recording apparatus capable of ejecting ink.

  An ink jet recording apparatus according to an aspect of the present invention includes a printer unit that conveys a sheet, ejects ink droplets onto the conveyed sheet, and records an image, and a control unit that controls the operation of the printer unit. The control unit is configured to acquire image data indicating a landing position where an ink droplet is landed, and a first acquisition process for acquiring a first sheet size of a sheet on which an image indicated by the image data is to be recorded; A second acquisition process for acquiring the second sheet size of the sheet on which the image is recorded and a recording process for recording an image on the sheet by causing the printer unit to eject ink droplets to the landing position. The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area. The control unit causes the printer unit in the recording process to eject ink droplets of the first ink size to the sheet region in response to the first sheet size and the second sheet size being matched, An ink droplet having a second ink size larger than the first ink size is ejected to the protruding area, and the second sheet size is larger than the first sheet size, and the sheet area and the protruding area are respectively Ink droplets of the first ink size are ejected.

  According to the above configuration, when the first sheet size and the second sheet size match, that is, when most of the ink droplets discharged to the protruding region land outside the sheet, the ink droplet size of the protruding region is set. It is larger than the ink droplet size in the sheet area. Thereby, it is possible to suppress mist formation of the ink droplets in the protruding region. On the other hand, when the second sheet size is larger than the first sheet size, that is, when most of the ink droplets ejected to the protruding area land on the sheet, the ink droplet sizes of the sheet area and the protruding area are matched. Thereby, it can suppress that the boundary of a sheet | seat area | region and a protrusion area | region is conspicuous.

  An ink jet recording apparatus according to another aspect of the present invention includes a printer unit that records an image by ejecting ink droplets onto a sheet, and a control unit that controls the operation of the printer unit. The control unit is configured to acquire image data indicating a landing position where an ink droplet is landed, and a first acquisition process for acquiring a first sheet size of a sheet on which an image indicated by the image data is to be recorded; A second acquisition process for acquiring a second sheet size of the sheet on which the image is recorded, an ink droplet of the first ink size at the landing position where an image having a density lower than the first density is recorded, and an image having the density equal to or higher than the first density. A recording process for recording an image on a sheet is performed by causing the printer unit to eject ink droplets having a second ink size larger than the first ink size at the landing position to be recorded. The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area. In the recording process, the control unit causes the printer unit to drop an ink droplet having a size corresponding to the density of the image onto the sheet region in response to the first sheet size and the second sheet size being matched. And ejecting ink droplets of the second ink size to the protruding area, and in response to the second sheet size being larger than the first sheet size, the image density to the sheet area and the protruding area, respectively. Ink droplets of a size corresponding to the size are ejected.

  A program according to an aspect of the present invention is executed by a computer including a printer unit that records an image by ejecting ink droplets onto a sheet. The program includes a first acquisition step of acquiring image data indicating a landing position where ink droplets are landed, and a first sheet size of a sheet on which an image indicated by the image data is to be recorded; The computer executes a second acquisition step of acquiring a second sheet size of the sheet to be recorded and a recording step of recording an image on the sheet by causing the printer unit to eject ink droplets to the landing position. The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area. In the recording step, the program causes the printer unit to eject ink droplets of the first ink size to the sheet region in response to the first sheet size and the second sheet size being matched, An ink droplet having a second ink size larger than the first ink size is ejected to the protruding area, and the second sheet size is larger than the first sheet size, and the second area is larger than the first sheet size. Ink droplets of one ink size are ejected.

  A program according to another embodiment of the present invention is executed by a computer including a communication unit that communicates with the inkjet recording apparatus. The program generates an image data indicating a landing position for landing an ink droplet, and a size of the ink droplet discharged to the landing position, and outputs the image data to the inkjet recording apparatus through the communication unit. And causing the computer to execute an output step. The image data is based on the first ink size and the first ink size. The landing positions of the sheet area of the first sheet size and the protruding areas outside the sheet area, and the ink droplets ejected to the landing positions are based on the first ink size and the first ink size. Indicates which is the larger second ink size. The ink jet recording apparatus records an image indicated by the image data on the sheet by ejecting ink droplets onto a second sheet size sheet. Then, in the generation step, the program records the size of the ink droplets ejected to the sheet area at the landing position according to the fact that the first sheet size and the second sheet size match. The image data is generated with a size corresponding to the density of the image and the size of the ink droplets ejected to the protruding area as the second ink size, and the second sheet size is larger than the first sheet size. Accordingly, the image data is generated in which the size of the ink droplets ejected to the sheet region and the heading region is sized according to the density of the image recorded at the landing position.

  According to the present invention, it is possible to obtain an ink jet recording apparatus that can eject ink droplets of an appropriate size according to the size relationship between the first sheet size and the second sheet size.

FIG. 1 is an external perspective view of the multifunction machine 10. FIG. 2 is a longitudinal sectional view schematically showing the internal structure of the printer unit 11. FIG. 3 is a plan view of the carriage 23 and the guide rails 43 and 44. FIG. 4 is a block diagram of the printer unit 11. FIG. 5 is a flowchart of the image recording process. FIG. 6 is a flowchart of the ink size determination process. 7A and 7B are diagrams for explaining a recording instruction transmitted from the external apparatus 150 to the multi-function device 10. FIG. 7A shows a data structure of the recording instruction, and FIG. 7B schematically shows each area in the image data. Indicate. FIG. 8 is a diagram showing the size of ink droplets ejected to each landing position in the image data. FIG. 8A shows that the downstream area 153 is a large ball and the width areas 154 and 155 are small balls. (B) is an example in which the downstream side region 153 and the width side regions 154 and 155 are determined as large balls, (C) is an example in which the width side regions 154 and 155 and the upstream side region 156 are determined as small balls, D) shows an example in which the width-side regions 154 and 155 and the upstream region 156 are determined to be large balls. FIG. 9 is a flowchart of image recording processing according to a modification. FIG. 10 is a diagram showing the size of the ink droplets ejected to each landing position in the image data. FIG. 10A is an example in which the downstream area 153 and the width areas 154 and 155 are determined to be large balls. (B) is an example in which the downstream region 153 is a large ball and the width side regions 154 and 155 are determined to have ink droplet sizes corresponding to the density, and (C) is a large ball in the width side regions 154 and 155 and the upstream region 156. (D) shows an example in which the width-side regions 154 and 155 and the upstream region 156 are determined to have appropriate ink sizes according to the density.

  Hereinafter, embodiments of the present invention will be described. The embodiment described below is merely an example of the present invention, and it is needless to say that the embodiment of the present invention can be changed as appropriate without departing from the gist of the present invention. Further, in the following description, the advance from the starting point of the arrow to the ending point is expressed as the direction, and the traffic on the line connecting the starting point and the ending point of the arrow is expressed as the direction. Further, the vertical direction 7 is defined with reference to the state where the multifunction machine 10 is installed (the state shown in FIG. 1), and the front / rear direction 8 is defined with the side where the opening 13 is provided as the front side (front). A left-right direction 9 is defined when the multifunction machine 10 is viewed from the front side (front side).

[Overall configuration of MFP 10]
As shown in FIG. 1, the multifunction machine 10 is formed in a substantially rectangular parallelepiped. The multifunction machine 10 includes a printer unit 11 that records an image on a sheet 12 (see FIG. 2) using an inkjet recording method at the bottom. The multifunction machine 10 has various functions such as a facsimile function and a print function. The printer unit 11 transports the paper 12 and ejects ink droplets onto the transported paper 12 to record an image. As shown in FIG. 2, the printer unit 11 includes a feeding unit 15, a feeding tray 20 (an example of a tray), a discharge tray 21, a transport roller unit 54, a recording unit 24, and a discharge roller unit 55. And a platen 42. The multifunction machine 10 is an example of an ink jet recording apparatus. The feeding unit 15, the conveyance roller unit 54, and the discharge roller unit 55 are examples of the conveyance unit.

[Feed tray 20, discharge tray 21]
The feeding tray 20 is inserted and removed in the front-rear direction 8 through an opening 13 (see FIG. 1) formed on the front surface of the printer unit 11. A plurality of sheets of paper 12 fed to the transport path 65 by the feeding unit 15 can be supported on the feeding tray 20. The discharge tray 21 supports the paper 12 discharged by the discharge roller unit 55 through the opening 13 formed on the front surface.

[Feeding unit 15]
As shown in FIG. 2, the feeding unit 15 includes a feeding roller 25, a feeding arm 26, and a shaft 27. The feeding roller 25 is rotatably supported on the leading end side of the feeding arm 26. The feeding roller 25 rotates in a direction (that is, forward rotation) in which the paper 12 is transported in the transport direction 16 by reverse rotation of the transport motor 102 (see FIG. 4). The feeding arm 26 is rotatably supported on a shaft 27 supported by the frame of the printer unit 11. The feeding arm 26 is urged to rotate toward the feeding tray 20 by its own weight or an elastic force by a spring or the like.

[Conveyance path 65]
As shown in FIG. 2, the conveyance path 65 indicates a space formed by an outer guide member 18 and an inner guide member 19 that are partially opposed to each other at a predetermined interval inside the printer unit 11. The conveyance path 65 is a path extending from the rear end portion of the feeding tray 20 to the rear side of the printer unit 11. The conveyance path 65 is a path that makes a U-turn while extending upward from below on the rear side of the printer unit 11 and reaches the discharge tray 21 through the recording unit 24. Note that the conveyance direction 16 of the paper 12 in the conveyance path 65 is indicated by a one-dot chain line arrow in FIG.

[Conveying roller unit 54]
As shown in FIG. 2, the transport roller unit 54 is disposed on the upstream side in the transport direction 16 from the recording unit 24. The conveyance roller unit 54 includes a conveyance roller 60 and a pinch roller 61 that face each other. The conveyance roller 60 is driven by the conveyance motor 102. The pinch roller 61 is rotated along with the rotation of the conveyance roller 60. The paper 12 is sandwiched between a transport roller 60 and a pinch roller 61 that are rotated forward by the forward rotation of the transport motor 102 and is transported in the transport direction 16.

[Discharge roller section 55]
As shown in FIG. 2, the discharge roller portion 55 is disposed downstream of the recording portion 24 in the transport direction 16. The discharge roller portion 55 includes a discharge roller 62 and a spur 63 that face each other. The discharge roller 62 is driven by the transport motor 102. The spur 63 is rotated along with the rotation of the discharge roller 62. The sheet 12 is nipped between the discharge roller 62 and the spur 63 that are rotated forward by the normal rotation of the conveyance motor 102, and is conveyed in the conveyance direction 16.

[Registration sensor 120]
As shown in FIG. 2, the printer unit 11 includes a registration sensor 120 (an example of a first sensor) on the upstream side in the transport direction 16 from the transport roller unit 54. The registration sensor 120 is a sensor for detecting the presence of the sheet 12 at an installation position (an example of a detection position) of the registration sensor 120. The registration sensor 120 controls a low level signal (which is an example of a detection signal and indicates “a signal level of which is less than a threshold value”) according to the presence of the sheet 12 at the installation position. To 130. On the other hand, the registration sensor 120 outputs a high level signal (refers to a signal whose signal level is equal to or higher than the threshold) to the control unit 130 (see FIG. 4) in response to the fact that the sheet 12 is not present at the installation position. To do. Hereinafter, a state in which a low level signal is output from the registration sensor 120 is referred to as a “registration active state”, and a state in which a high level signal is output from the registration sensor 120 is referred to as a “registration inactive state”.

[Rotary encoder 121]
Further, as shown in FIG. 4, the printer unit 11 includes a known rotary encoder 121 (a second sensor) that generates a pulse signal in accordance with the rotation of the transport roller 60 (in other words, the rotational drive of the transport motor 102). An example). The rotary encoder 121 includes an encoder disk and an optical sensor. The encoder disk rotates with the rotation of the transport roller 60. The optical sensor reads the rotating encoder disk to generate a pulse signal, and outputs the generated pulse signal to the control unit 130.

[Recording unit 24]
As shown in FIG. 2, the recording unit 24 is disposed between the conveyance roller unit 54 and the discharge roller unit 55 in the conveyance direction 16. The recording unit 24 is disposed so as to face the platen 42 in the vertical direction 7. The recording unit 24 includes a carriage 23, a recording head 39, an encoder sensor 38A, and a media sensor 122 (an example of a sensor). Further, as shown in FIG. 3, an ink tube 32 and a flexible flat cable 33 are extended from the carriage 23. The ink tube 32 supplies ink from the ink cartridge to the recording head 39. The flexible flat cable 33 electrically connects the control board on which the control unit 130 is mounted and the recording head 39.

  As shown in FIG. 3, the carriage 23 is supported by guide rails 43 and 44 that extend in the left-right direction 9 at positions spaced in the front-rear direction 8. The carriage 23 is connected to a known belt mechanism provided on the guide rail 44. This belt mechanism is driven by a carriage motor 103 (see FIG. 4). That is, the carriage 23 connected to the belt mechanism that moves circumferentially by driving the carriage motor 103 can reciprocate in the main scanning direction along the left-right direction 9. The carriage 23 moves in the FWD direction from the right end to the left end by the forward rotation of the carriage motor 103, and moves in the RVS direction from the left end to the right end by the reverse rotation of the carriage motor 103.

  The recording head 39 is mounted on the carriage 23 as shown in FIG. A plurality of nozzles 40 are formed on the lower surface of the recording head 39. The recording head 39 ejects ink from the nozzle 40 as fine ink droplets. In the process of moving the carriage 23, the recording head 39 ejects ink droplets onto the paper 12 supported by the platen 42. As a result, an image is recorded on the paper 12. For example, a plurality of nozzles 40 are arranged on the nozzle surface of the lower surface of the recording head 39. Although the specific number of the nozzles 40 is not particularly limited, for example, four nozzle rows in which 420 nozzles 40 are arranged in a staggered manner along the front-rear direction 8 are arranged in four rows in the left-right direction 9. The nozzles 40 included in each nozzle row eject one of black, cyan, magenta, and yellow ink.

  Note that the recording unit 24 in the present embodiment repeats a recording process in which the recording head 39 ejects ink in the process of moving the carriage 23 in the FWD direction or the RVS direction at least once, typically a plurality of times. An image is recorded on the paper 12. In the present specification, an area of the paper 12 on which an image is recorded by one recording process is defined as a unit area. That is, the paper 12 is divided into a plurality of unit areas adjacent in the transport direction 16.

  The guide rail 44 is provided with a belt-like encoder strip 38 </ b> B extending in the left-right direction 9. The encoder sensor 38A is mounted on the lower surface of the carriage 23 at a position facing the encoder strip 38B. In the process of moving the carriage 23, the encoder sensor 38 </ b> A reads the encoder strip 38 </ b> B to generate a pulse signal, and outputs the generated pulse signal to the control unit 130. The encoder sensor 38A and the encoder strip 38B constitute the carriage sensor 38 shown in FIG.

[Platen 42]
As illustrated in FIG. 2, the platen 42 is disposed between the transport roller unit 54 and the discharge roller unit 55 in the transport direction 16. The platen 42 is disposed so as to face the recording unit 24 in the vertical direction 7 and supports the paper 12 conveyed by the conveyance roller unit 54 from below. The light reflectance of the platen 42 in this embodiment is set lower than that of the paper 12.

[Media sensor 122]
As shown in FIG. 2, the media sensor 122 is mounted on the carriage 23 on the lower surface of the carriage 23 (the surface facing the platen 42). The media sensor 122 includes a light emitting unit composed of a light emitting diode or the like, and a light receiving unit composed of an optical sensor or the like. The light emitting unit irradiates the platen 42 with the amount of light instructed by the control unit 130. The light emitted from the light emitting unit is reflected by the platen 42 or the paper 12 supported by the platen 42, and the reflected light is received by the light receiving unit. The media sensor 122 outputs a detection signal corresponding to the amount of light received by the light receiving unit to the control unit 130. For example, the media sensor 122 outputs a detection signal having a higher level to the control unit 130 as the amount of received light is larger.

[Communication unit 14]
As illustrated in FIG. 4, the multifunction machine 10 includes a communication unit 14. The communication unit 14 is an interface for communicating with the external device 150 (see FIG. 7) through a communication network. Although the specific example of the external device 150 is not specifically limited, For example, they are PC (Personal Computer), a smart phone, a tablet terminal, etc. Specific examples of the communication network are not particularly limited. For example, a wired LAN (abbreviation for local area network), a wireless LAN, a WAN (abbreviation for wide area network), or a combination thereof may be used. The communication unit 14 may be an interface for connecting a cable such as a USB (Universal Serial Bus) directly connected to an external device.

[Control unit 130]
As shown in FIG. 4, the control unit 130 includes a CPU 131, a ROM 132, a RAM 133, an EEPROM 134, and an ASIC 135, which are connected by an internal bus 137. The ROM 132 stores a program for the CPU 131 to control various operations. The RAM 133 is used as a storage area for temporarily recording data and signals used when the CPU 131 executes the program, or as a work area for data processing. The EEPROM 134 stores settings, flags, and the like that should be retained even after the power is turned off.

  A transport motor 102 and a carriage motor 103 are connected to the ASIC 135. The ASIC 135 generates a drive signal for rotating each motor, and controls each motor based on the drive signal. Each motor rotates normally or reversely according to a drive signal from the ASIC 135. For example, the control unit 130 controls the driving of the transport motor 102 to drive each roller. Further, the control unit 130 controls the drive of the carriage motor 103 to reciprocate the carriage 23. The control unit 130 controls the recording head 39 to eject ink from the nozzles 40. Further, the control unit 130 acquires a recording instruction from an external device through the communication unit 14.

  In addition, a carriage sensor 38, a registration sensor 120, a rotary encoder 121, and a media sensor 122 are connected to the ASIC 135. The control unit 130 detects the position of the carriage 23 based on the pulse signal output from the carriage sensor 38. Further, the control unit 130 detects the position of the paper 12 based on the detection signal output from the registration sensor 120 and the pulse signal output from the rotary encoder 121. Further, the control unit 130 detects the end position of the sheet 12 in the left-right direction 9 based on the detection signal output from the media sensor 122.

[Image recording processing]
With reference to FIGS. 5 to 8, image recording processing by the multifunction machine 10 will be described. This image recording process is executed by the CPU 131 of the control unit 130. The following processes may be executed by the CPU 131 reading out and executing a program stored in the ROM 132, or may be realized by a hardware circuit mounted on the control unit 130. The image recording process will be described by paying attention to the rotation of the feeding roller 25, the transport roller 60, and the discharge roller 62, or the movement of the carriage 23. These operations are realized by driving the transport motor 102 and the carriage motor 103 as described above.

  The image recording process shown in FIG. 5 is started in response to a recording instruction being input to the multifunction device 10. In addition, when performing the image recording process, the control unit 130 sets “OFF” in a width mismatch flag and a length mismatch flag described later. The recording instruction is an instruction for causing the multi-function peripheral 10 to execute a recording process for recording the image indicated by the image data on the paper 12. The acquisition destination of the recording instruction is not particularly limited. For example, the recording instruction may be acquired from the external device 150 (see FIG. 7A) through the communication unit 14, or may be acquired through the operation unit provided in the multifunction machine 10. Good. The process for acquiring the recording instruction is an example of a first acquisition process.

  As shown in FIG. 7A, the recording instruction includes control information and image data. The control information includes a borderless print flag and first sheet size information. The borderless printing flag is information indicating that the image recording process according to the recording instruction is so-called borderless printing. The first sheet size information is information indicating the size of the paper 12 on which the image indicated by the image data is to be recorded. The image data is data indicating a landing position where an ink droplet is landed. The image data is divided into a plurality of unit image data (N in the example of FIG. 7A) each indicating a unit image recorded in the unit area. Therefore, the control unit 130 starts the image recording process in response to the acquisition of the control information, and stores the acquired plurality of unit image data in the image memory (RAM 133 or EEPROM 134).

  As shown in FIG. 7B, the image data indicates the landing positions of the sheet area 151 of the first sheet size and the protruding area 152 outside the sheet area 151. Further, the protruding area 152 includes a downstream area 153, width-side areas 154 and 155, and an upstream area 156. The downstream area 153 is an area adjacent to the downstream side of the sheet area 151 in the conveyance direction 16. The width side regions 154 and 155 are regions adjacent to the sheet region 151 in the main scanning direction (an example of the width direction). The upstream area 156 is an area adjacent to the upstream side of the sheet area 151 in the conveyance direction 16.

  Note that the sheet area 151 refers to an area of an image recorded on the paper 12 when it is assumed that the image indicated by the image data is recorded on the paper 12 having the first sheet size. That is, in a recording process to be described later, ink droplets ejected toward the respective landing positions in the sheet area 151 land on corresponding positions on the first sheet size paper 12. On the other hand, the protrusion area 152 indicates an image that is not recorded on the paper 12 when it is assumed that the image indicated by the image data is recorded on the paper 12 having the first sheet size. That is, in a recording process described later, ink droplets ejected toward each landing position of the protruding area 152 land on the periphery of the first sheet size paper 12 (typically, the platen 42). Lands at corresponding positions on the two-sheet size paper 12.

  In the example of FIG. 7B, each area surrounded by a broken line indicates an area where each ink droplet lands (hereinafter referred to as “dot”). Also, hatched dots indicate landing positions, and white dots indicate positions where ink droplets are not landed (hereinafter referred to as “non-landing positions”). In the present embodiment, the type of hatching is not considered. Although the number of dots included in the image data is simplified in FIG. 7B, for example, the number of dots in the front-rear direction 8 included in the unit image data is 420, the downstream area 153, and the upstream area 156. The number of dots in the front-rear direction 8 included in 57 is 57, and the number of dots in the left-right direction 9 included in the width-side regions 154 and 155 is 57. On the other hand, the number of dots in the front-rear direction 8 and the left-right direction 9 included in the sheet region 151 differs depending on the first sheet size.

  First, the control unit 130 executes a cueing process (S11). In the cueing process, the paper 12 supported on the feed tray 20 is fed to the feed roller 25, the transport roller unit 54, and the discharge until the unit area where the image is recorded first reaches the position facing the recording head 39. This is a process of transporting to the roller unit 55. Specifically, the control unit 130 rotates the feeding roller 25 in the forward direction until the leading end of the paper 12 (referring to the “end on the downstream side in the transport direction 16”) reaches the transport roller unit 54. Next, the control unit 130 rotates the transport roller 60 and the discharge roller 62 in the forward direction until the unit area where the image is first recorded reaches a position facing the recording head 39. Note that the size of the paper 12 supported by the feeding tray 20 is an example of a second sheet size.

  Note that the position of the leading edge of the paper 12 is specified by a combination of a change in the signal from the registration sensor 120 and a pulse signal from the rotary encoder 121. In addition, the control unit 130 counts the number of pulse signals from the time when the registration inactive state changes to the registration active state. Further, the control unit 130 stores the count value in the RAM 133 or the EEPROM 134. This count value is an accumulated value of the count value in the cueing process and the conveyance process (S20) for the paper 12, and is initialized at the timing when the cueing process for the new paper 12 is executed. The process of counting the pulse signal is an example of a second acquisition process for acquiring the second sheet size.

  Further, in the cueing process (S11) for the recording instruction including the borderless printing flag, the control unit 130 feeds the paper 12 to the feeding roller 25 and the transport roller unit 54 until the leading edge of the paper 12 reaches a specific position. To transport. The specific position is a position where the leading edge of the paper 12 and the nozzle 40 that ejects ink droplets toward the downstream end of the sheet region 151 in the conveyance direction 16 face each other. For example, when the three nozzles 40 on the downstream side in the transport direction 16 of each nozzle row discharge ink droplets to the downstream region 153, the leading end of the paper 12 is the third nozzle counted from the downstream side in the transport direction 16. It is transported by cueing processing to a position facing between 40 and the fourth nozzle 40.

  Next, the control unit 130 executes a width detection process (S12). The width detection process is a process of detecting the edge position in the left-right direction 9 of the paper 12 facing the recording head 39 by the cueing process. Specifically, the control unit 130 moves the carriage 23 in the left-right direction 9 in a state where light is emitted from the light emitting unit of the media sensor 122. Then, the control unit 130 detects a position where the change amount of the detection signal output from the media sensor 122 is equal to or greater than the threshold change amount as the end position of the paper 12. The end position may be specified by the encoder value of the carriage sensor 38, for example. The process of step S12 is another example of the second acquisition process.

  Next, the control unit 130 determines that the length of the first sheet size in the left-right direction 9 (hereinafter referred to as “first paper width”) is the length of the second sheet size in the left-right direction 9 (hereinafter referred to as “first sheet size”). If it is longer (S13: Yes), the process proceeds to step S14. After notifying that the correct size paper 12 is set in the feeding tray 20 (S14), the control unit 130 ends the image recording process. Although the specific method of notification is not particularly limited, for example, a message or animation may be displayed on a display unit provided in the multifunction machine 10, or a guide voice may be output from a speaker (not shown).

  On the other hand, in response to the second paper width being longer than the first paper width (S13: No & S15: Yes), the control unit 130 sets the width mismatch flag to “ON” (S16). Further, the control unit 130 executes an ink size determination process described later without executing the process of step S16 in response to the first sheet width and the second sheet width matching (S13: No & S15: No). (S17).

  For example, when the first sheet size included in the control information is the size of the paper 12 defined in the JIS standard such as “A4” and “B5” (hereinafter referred to as “standard size”), the control unit 130. Can acquire the first sheet width corresponding to the first sheet size from among the lengths of the respective sizes 9 stored in the ROM 132 or the EEPROM 134 in the left-right direction. For example, the control unit 130 can acquire the second sheet width based on the difference between the encoder values corresponding to the left and right end positions of the sheet 12 detected in the width detection process.

  The ink size determination process (S17) is a process for determining the size of the ink droplet ejected to each landing position indicated in the unit image data in the recording process (S18) to be executed next. The process of step S17 is an example of a determination process. The size of the ink droplets in this embodiment is a small ball (an example of the first ink size, which is expressed as “01” in FIG. 8), and a large ball larger than the small ball (an example of the second ink size). In FIG. 8, it is expressed as “11”). Further, in FIG. 8, dots that do not eject ink droplets are indicated by “00”. Details of the ink size determination process will be described later.

  Next, the control unit 130 executes a recording process (S18). The recording process is a process in which the carriage 23 is moved in one of the FWD direction and the RVS direction, and the ink droplets are ejected to the recording head 39 to each landing position. That is, the unit image indicated by the unit image data is recorded in the unit area of the paper 12 in one recording process. Further, in the recording process, the control unit 130 ejects ink droplets having a size determined in the ink size determination process (S16) to each landing position.

  Next, the control unit 130 executes the transport process (S20) on condition that the image recording on the paper 12 has not been completed yet (S19: No). The transport process is a process of transporting the paper 12 in the transport direction 16 by a predetermined line feed width. Specifically, the control unit 130 causes the transport roller unit 54 and the discharge roller unit 55 to transport the paper 12 in the transport direction 16 by a predetermined line feed width. Further, as described above, the control unit 130 counts the pulse signals output from the rotary encoder 121 during the conveyance process.

  Then, in the course of the transport process, the control unit 130 executes the process of step S14 in response to the count value being less than the threshold number and the registration inactive state (S21: Yes). The threshold value indicates the number of pulse signals corresponding to the length of the first sheet size in the front-rear direction 8. That is, the threshold number is determined according to the first sheet size included in the recording instruction. The case where the count value is less than the threshold number and the register inactive state indicates the following case. That is, the length of the first sheet size in the front-rear direction 8 (hereinafter referred to as “first paper length”) is the length of the second sheet size in the front-rear direction 8 (hereinafter referred to as “second paper length”). ”.) Indicates a longer case.

  Further, the control unit 130 sets the length mismatch flag to “ON” (S23) in response to the count value exceeding the threshold number and being in the regi-active state (S21: No & S22: Yes), and the ink size A determination process (S17) is executed. The ink size determination process (S17) is a process for determining the size of the ink droplet for the next unit image data. Then, the control unit 130 executes the recording process (S18) with the ink droplet size determined in the ink size determination process (S17). The case where the count value exceeds the threshold number and is in the regi-active state indicates that the second paper length is longer than the first paper length. Furthermore, when the combination of the count value and the signal output from the registration sensor 120 is other than Steps S21 and S22, the control unit 130 executes the processing after Step S17 again without executing the processing at Step S23.

  The control unit 130 repeatedly executes the processes of steps S17 to S23 until the image recording on the paper 12 is completed (S19: Yes). Then, the control unit 130 executes a discharge process for discharging the paper 12 to the discharge tray 21 on the condition that the image recording on the paper 12 is completed (S19: Yes) (S24). Specifically, the control unit 130 causes the transport motor 102 to rotate normally until the paper 12 is discharged to the discharge tray 21. The control unit 130 repeatedly executes steps S11 to S24 until all images included in the recording instruction are recorded (S25: Yes). Then, the control unit 130 ends the image recording process in response to recording all the images included in the recording instruction (S25: No).

  Next, the ink size determination process will be described in detail with reference to FIGS. In this embodiment, it is assumed that the size of the ink droplets ejected to all the landing positions in the sheet region 151 is determined as a small ball, and hereinafter, the size of the ink droplets ejected to each landing position in the protruding region 152 is set as the size. The process to determine is demonstrated. That is, as shown in FIG. 8, “01” is set at each landing position in the sheet region 151, and “00” is set at each non-landing position in the sheet region 151.

  First, the control unit 130 reads unit image data used in the next recording process from among one or more unit image data stored in the image memory (S31). Next, in response to the fact that the downstream unit 153 is included in the read unit image data (S32: Yes), the control unit 130 sets the size of the ink droplets to be ejected to each landing position of the downstream region 153 as a large dot. Determine (S33). For example, when the unit image data (1 / N) shown in FIG. 7B is read in step S31, as shown in FIGS. 8A and 8B, the downstream region 153 “11” is set at each landing position, and “00” is set at each non-landing position in the downstream area 153.

  Further, the control unit 130 responds to the fact that the upstream area 156 is included in the read unit image data (S32: No & S34: Yes) and the length mismatch flag is set to “ON” (S35). : Yes), the size of the ink droplet ejected to each landing position of the upstream area 156 is determined to be a small ball (S36). For example, if the unit image data (N / N) shown in FIG. 7B is read in step S31 and the length mismatch flag is set to “ON”, the data is shown in FIG. 8C. Thus, “01” is set at each landing position in the upstream area 156 and “00” is set at each non-landing position in the upstream area 156.

  Further, the control unit 130 responds to the fact that the upstream area 156 is included in the read unit image data (S32: No & S34: Yes) and the length mismatch flag is set to “OFF” (S35). : No), the size of the ink droplet ejected to each landing position of the upstream region 156 is set to a large ball (S37). For example, if the unit image data (N / N) shown in FIG. 7B is read in step S31 and the length mismatch flag is set to “OFF”, it is shown in FIG. 8D. Thus, “11” is set at each landing position in the upstream area 156, and “00” is set at each non-landing position in the upstream area 156.

  Further, in response to the fact that neither the downstream area 153 nor the upstream area 156 is included in the read unit image data (S32: No & S34: No), the control unit 130 performs the processes of steps S33 and S35 to S37. Without proceeding to step S38. The unit image data read in this case is unit image data (2 / N) shown in FIG. 7B, for example.

  Next, in response to the setting of “ON” in the width mismatch flag (S38: Yes), the control unit 130 sets the size of the ink droplets to be ejected to the landing positions in the width-side regions 154 and 155 to small balls. Set (S39). On the other hand, in response to the setting of “OFF” in the width mismatch flag (S38: No), the control unit 130 sets the size of the ink droplets to be ejected to the landing positions of the width-side regions 154 and 155 as large balls. (S40). Note that the processing in steps S38 to S40 is executed for all unit image data.

  As an example, if “ON” is set in the width mismatch flag, “01” is set at each landing position in the width-side regions 154 and 155 as shown in FIGS. 8A and 8C. Then, “00” is set at each non-landing position in the width side region 154. As another example, if “OFF” is set in the width mismatch flag, as shown in FIGS. 8B and 8D, “11” is set at each landing position in the width side regions 154 and 155. Is set, and “00” is set at each non-landing position in the width side region 154.

[Operational effects of this embodiment]
According to the above embodiment, when the first sheet size and the second sheet size match, that is, when the ink droplets ejected to the protruding region 152 land outside the paper 12, the ink droplet size of the protruding region 152 Is made larger than the ink droplet size of the sheet region 151. Thereby, the mist formation of the ink droplets ejected to the protruding region 152 can be suppressed. However, the size of the ink droplets at all the landing positions in the protruding area 152 may not be large, and some may be small. On the other hand, when the second sheet size is larger than the first sheet size, that is, when most of the ink droplets ejected to the protruding region 152 land on the paper 12, the ink droplets ejected to the sheet region 151 and the protruding region 152 Match the size. Thereby, it is possible to suppress the conspicuous boundary between the sheet region 151 and the protruding region 152.

  In the present embodiment, the size of the ink droplets discharged to the landing positions of the downstream region 153, the width region 154, 155, and the upstream region 156 constituting the protruding region 152 is independently determined. . As a result, even when a sheet 12 different from the standard size is set on the feeding tray 20, ink droplets having an appropriate size corresponding to the size of the sheet 12 in the front-rear direction 8 and the left-right direction 9 are landed on the landing positions. be able to.

  First, the leading end position of the paper 12 is adjusted in the cueing process so that the ink droplets discharged to the downstream area 153 do not land on the paper 12. Therefore, the control unit 130 may always cause the recording head 39 to eject large ink droplets toward the downstream area 153 regardless of the size relationship between the first sheet size and the second sheet size.

  In addition, when the first paper width and the second paper width match, the ink droplets ejected to the width side regions 154 and 155 do not land on the paper 12. In this case, the control unit 130 may cause the recording head 39 to eject large ink droplets toward the width-side regions 154 and 155. On the other hand, when the second paper width is larger than the first paper width, most of the ink droplets ejected to the width-side regions 154 and 155 land on the paper 12. In this case, the control unit 130 may cause the recording head 39 to eject small ink droplets toward the width-side regions 154 and 155.

  Furthermore, when the first paper length and the second paper length match, the ink droplets ejected to the upstream area 156 do not land on the paper 12. In this case, the control unit 130 may cause the recording head 39 to eject large ink droplets toward the upstream region 156. On the other hand, when the second paper length is larger than the first paper length, most of the ink droplets ejected to the upstream area 156 land on the paper 12. In this case, the control unit 130 may cause the recording head 39 to eject small ink droplets toward the upstream region 156.

  In the above-described embodiment, the example in which the second sheet width is acquired using the media sensor 122 and the second sheet length is acquired using the registration sensor 120 and the rotary encoder 121 has been described. As described above, by acquiring the second sheet size using the sensor mounted on the existing multifunction machine 10, the above-described object can be achieved without providing a new sensor. However, the acquisition method of the second sheet size is not limited to the above example. For example, the multifunction machine 10 may include a tray sensor that detects the size of the paper 12 supported by the feeding tray 20. Then, the control unit 130 may acquire the second sheet size from the tray sensor. Thereby, since the second sheet size can be acquired before the cueing process is executed, the throughput of the image recording process is improved.

  In the above embodiment, the image data indicating the landing positions of the sheet area 151 and the protruding area 152 is acquired from the external device 150, and each landing position is determined according to the magnitude relationship between the first sheet size and the second sheet size. The example of determining the size of the ink droplet ejected to the head has been described. That is, in the above-described embodiment, the image data included in the recording instruction may be, for example, in JPEG (Joint Photographic Experts Group) format. However, the method for determining the size of the ink droplet ejected to each landing position of the protruding region 152 is not limited to this.

  For example, the control unit 130 sets image data in which “01” (that is, a small ball) is set at each landing position in the sheet area 151 and “11” (that is, a large ball) is set at each landing position in the protruding area 152. That is, the image data shown in FIGS. 8A and 8C may be acquired from the external device 150 through the communication unit 14. Then, the control unit 130 causes the recording head 39 to eject ink droplets having a size indicated by the image data in response to the first sheet size and the second sheet size matching each other. On the other hand, in response to the second sheet size being larger than the first sheet size, the control unit 130 determines the size of the ink droplets in the protruding region 152 indicated by the image data (that is, FIG. 8B and FIG. 8). (D)) and the ink is ejected to the recording head 39.

  Furthermore, in this embodiment, although the example which acquires image data from an external device through the communication part 14 was demonstrated, this invention is not limited to this. For example, image data read by a scanner provided in the multifunction device 10 may be acquired, or image data may be acquired from a recording medium attached to a media attachment unit provided in the multifunction device 10. . Although the specific example of a recording medium is not specifically limited, For example, portable recording media, such as a USB memory, may be sufficient.

[Modification]
With reference to FIG. 9 and FIG. 10, an image recording process according to a modification will be described. Note that a detailed description of the points in common with the above embodiment will be omitted, and the differences will be mainly described. In addition, the above-described embodiments and modifications can be arbitrarily combined without departing from the spirit of the present invention.

  First, the external device 150 according to the modified example receives first image data including size information indicating the size of an ink droplet ejected toward each landing position based on, for example, the image data illustrated in FIG. Generate (S41). The process of step S41 is an example of a generation process. Then, the external device 150 outputs a recording instruction including the first sheet size and the first image data to the multifunction machine 10 through the communication unit (not shown) (S42). The process of step S42 is an example of an output process.

  In step S41, the external device 150 determines the size of the ink droplets ejected to each landing position of the sheet region 151 to a size corresponding to the density of the image recorded at the landing position. On the other hand, the external device 150 determines the size of the ink droplets to be ejected to the respective landing positions of the protruding area 152 as a large ball. That is, the first image data indicates an image recorded on the paper 12 when the first sheet size matches the second sheet size. FIG. 10A and FIG. 10C are examples of first image data.

  For example, an ink droplet ejected to a landing position (landing position indicated by hatching in FIG. 7B) in the sheet region 151 where an image having a density lower than the first density is recorded is a small ball (FIG. 10A). And (indicated by “01” in FIG. 10C). On the other hand, the ink droplets ejected to the landing position (the landing position indicated by lattice hatching in FIG. 7B) in the sheet region 151 where the image of the first density or higher is recorded are large balls (FIG. And (indicated by “11” in FIG. 10C).

  The control unit 130 compares the first sheet size and the second sheet size in response to obtaining a recording instruction from the external device 150 through the communication unit 14 (S43). Then, when the second sheet size is larger than the first sheet size (S43: Yes), the control unit 130 outputs a size mismatch instruction to the external device 150 through the communication unit 14 (S44). The size mismatch instruction is an instruction for causing the external device 150 to recognize that the second sheet size is larger than the first sheet size.

  The external device 150 generates the second image data in response to obtaining the size mismatch instruction from the multifunction device 10 through the communication unit (S45). The process of step S45 is another example of the generation process. Then, the external device 150 outputs the second image data to the multifunction machine 10 through the communication unit (S46). The process of step S46 is another example of the output process.

  The second image data is the same as the first image data in that it includes size information, and the size information determination method is different from that of the first image data. Specifically, the external device 150 determines the size of ink droplets to be ejected to the landing positions of the sheet area 151 and the protrusion area 152 (more specifically, the width-side areas 154 and 155 and the upstream area 156). The size is determined according to the density of the image recorded at the landing position. FIG. 10B and FIG. 10D are examples of second image data. That is, the size of the ink droplet ejected to each landing position in the sheet region 151 is common to the first image data and the second image data.

  On the other hand, the ink droplets ejected to the landing positions (landing positions indicated by hatching in FIG. 7B) in the width-side areas 154 and 155 and the upstream area 156 where the image having the first density is recorded are , A small ball (indicated by “01” in FIGS. 10B and 10D). On the other hand, the ink droplets discharged to the landing positions (landing positions indicated by lattice hatching in FIG. 7B) in the width-side areas 154 and 155 and the upstream-side area 156 where an image of the first density or higher is recorded are A large ball (indicated by “11” in FIGS. 10B and 10D). However, in the recording process (S47), the size of the ink droplets ejected to the respective landing positions in the downstream area 153 that is the outside of the sheet 12 is set to “11” in FIGS. 10B and 10D. "Denoted").

  In response to the acquisition of the second image data from the external device 150 through the communication unit 14, the control unit 130 executes a recording process for recording the image indicated by the second image data on the paper 12 (S47). On the other hand, the control unit 130 skips steps S44 to S46 in response to the first sheet size and the second sheet size being equal (S43: No), and displays the image indicated by the first image data on the paper 12 The recording process for recording in (S47) is executed. Note that the recording process according to the modification includes, for example, steps S12, S18, S19, S20, S24, and S25 shown in FIG.

  According to the above modification, in addition to the effects of the above embodiment, the density of the image recorded on the paper 12 is emphasized. In the above modification, the size of the ink droplet is not limited to two. For example, a small ink droplet is ejected to a landing position where an image having a density lower than the first density is recorded. (Smaller) ink droplets may be ejected, and large ink droplets may be ejected to the landing position where an image of the second density or higher is recorded. In addition, the external device 150 according to the modification includes the first image data in the recording instruction and outputs the first image data to the multi-function peripheral 10, and outputs the second image data to the multi-function peripheral 10 in response to obtaining the size mismatch instruction. However, the processing procedure is not limited to this.

  For example, the external device 150 outputs a recording instruction that includes the first sheet size and does not include image data to the multifunction device 10 through the communication unit. Next, the control unit 130 outputs a size matching instruction to the external device 150 through the communication unit 14 in response to the first sheet size and the second sheet size matching. On the other hand, the control unit 130 outputs a size mismatch instruction to the external device 150 through the communication unit 14 in response to the second sheet size being larger than the first sheet size. Next, the external device 150 outputs the first image data to the multifunction device 10 through the communication unit in response to obtaining the size matching instruction. On the other hand, the external device 150 outputs the second image data to the multifunction device 10 through the communication unit in response to obtaining the size mismatch instruction. Then, the control unit 130 records the image indicated by the acquired first image data or second image data on the paper 12.

DESCRIPTION OF SYMBOLS 10 ... Multifunction machine 11 ... Printer part 20 ... Feed tray 23 ... Carriage 24 ... Recording part 39 ... Recording head 40 ... Nozzle 54 ... Conveyance roller part 55- .. discharge roller section 120... Registration sensor 121... Rotary encoder 122... Media sensor 130... Control section 150 .. external device 151.・ Downstream region 154... Width region 155... Width region 156.

Claims (8)

A printer unit that conveys a sheet and ejects ink droplets onto the conveyed sheet to record an image;
A control unit for controlling the operation of the printer unit,
The control unit
First acquisition processing for acquiring image data indicating a landing position for landing an ink droplet, and a first sheet size of a sheet on which an image indicated by the image data is to be recorded;
A second acquisition process for acquiring a second sheet size of a sheet on which an image is recorded by the printer unit;
A recording process for recording an image on a sheet by causing the printer unit to eject ink droplets to the landing position;
The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area,
The control unit is connected to the printer unit in the recording process.
In response to the coincidence of the first sheet size and the second sheet size, ink droplets of the first ink size are ejected to the sheet area, and a second ink size larger than the first ink size is ejected to the protruding area. Eject ink drops,
An ink jet recording apparatus that ejects ink droplets of the first ink size to each of the sheet region and the protruding region in response to the second sheet size being larger than the first sheet size. The protruding area is
A downstream region adjacent to the downstream side of the sheet region in the conveying direction of the sheet;
Including a width side region adjacent to the sheet region in the width direction intersecting the transport direction,
The control unit
Until the downstream end of the sheet in the transport direction reaches the position facing the nozzle that ejects ink droplets that land on the downstream end of the sheet area in the transport direction, the printer unit Cueing process to be conveyed to
Performing the recording process on the sheet conveyed in the cueing process,
In the recording process,
In response to the lengths in the width direction of the first sheet size and the second sheet size being matched, ink droplets of the second ink size are ejected to the downstream region and the width region,
In response to the length in the width direction of the second sheet size being longer than the length in the width direction of the first sheet size, ink droplets of the second ink size are ejected to the downstream region, and the width The ink jet recording apparatus according to claim 1, wherein the ink droplet of the first ink size is ejected to a side region. The protruding area includes an upstream area adjacent to the upstream side of the sheet area in the conveying direction,
The control unit is connected to the printer unit in the recording process.
In response to the lengths of the first sheet size and the second sheet size in the transport direction being coincident, ink droplets of the second ink size are ejected to the upstream region,
The ink droplet of the first ink size is ejected to the upstream region in response to a length of the second sheet size in the transport direction being longer than a length of the first sheet size in the transport direction. 2. An ink jet recording apparatus according to 1. The image data indicates that the ink droplet of the first ink size is landed on the landing position of the sheet area, and the ink droplet of the second ink size is landed on the landing position of the protrusion area,
The control unit is connected to the printer unit in the recording process.
In response to the first sheet size and the second sheet size matching, ink droplets having a size indicated by the image data are ejected,
4. The ink droplets in the protruding area indicated by the image data are corrected to the first ink size and ejected when the second sheet size is larger than the first sheet size. Any one of the inkjet recording apparatuses. The control unit
A determination process for determining the size of the ink droplets discharged to the landing position;
Performing the recording process of causing the printer unit to eject ink droplets having a size determined in the determination process,
In the above decision process,
In response to the coincidence of the first sheet size and the second sheet size, the ink droplet ejected to the sheet region is determined as the first ink size, and the ink droplet ejected to the protruding region is determined to be the second ink size. Decided on
5. The ink droplet ejected to each of the sheet region and the protruding region is determined as the first ink size in response to the second sheet size being larger than the first sheet size. Inkjet recording apparatus. A printer unit that ejects ink droplets onto a sheet and records an image;
A control unit for controlling the operation of the printer unit,
The control unit
First acquisition processing for acquiring image data indicating a landing position for landing an ink droplet, and a first sheet size of a sheet on which an image indicated by the image data is to be recorded;
A second acquisition process for acquiring a second sheet size of a sheet on which an image is recorded by the printer unit;
An ink droplet having a first ink size is placed at the landing position where an image having a density lower than the first density is recorded, and a second ink size larger than the first ink size is placed at the landing position where an image having a density higher than the first density is recorded. A recording process for recording an image on a sheet by discharging ink droplets to the printer unit, and
The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area,
The control unit is connected to the printer unit in the recording process.
In response to the coincidence of the first sheet size and the second sheet size, an ink droplet having a size corresponding to the density of the image is ejected to the sheet region, and the ink droplet of the second ink size is ejected to the protruding region. Discharge
An ink jet recording apparatus that ejects ink droplets having a size corresponding to a density of an image to each of the sheet region and the protruding region in response to the second sheet size being larger than the first sheet size. A program executed by a computer including a printer unit that discharges ink droplets onto a sheet to record an image,
A first acquisition step of acquiring image data indicating a landing position for landing an ink droplet, and a first sheet size of a sheet on which an image indicated by the image data is to be recorded;
A second acquisition step of acquiring a second sheet size of a sheet on which an image is recorded by the printer unit;
Causing the computer to execute a recording step of recording an image on a sheet by causing the printer unit to eject ink droplets to the landing position.
The image data indicates the landing positions of the sheet area of the first sheet size and the protruding area outside the sheet area,
The program is stored in the printer unit in the recording step.
In response to the coincidence of the first sheet size and the second sheet size, ink droplets of the first ink size are ejected to the sheet area, and a second ink size larger than the first ink size is ejected to the protruding area. Eject ink drops,
A program for ejecting ink droplets of the first ink size to each of the sheet region and the protruding region in response to the second sheet size being larger than the first sheet size. A program executed by a computer including a communication unit that communicates with an inkjet recording apparatus,
A generation step of generating image data indicating a landing position where the ink droplet is landed and a size of the ink droplet ejected to the landing position;
Outputting the image data to the inkjet recording apparatus through the communication unit;
The image data is based on the first ink size and the first ink size. The landing positions of the sheet area of the first sheet size and the protruding areas outside the sheet area, and the ink droplets ejected to the landing positions are based on the first ink size and the first ink size. Indicates which is the larger second ink size,
The inkjet recording apparatus records an image indicated by the image data on the sheet by ejecting ink droplets onto a second sheet size sheet,
In the generation step, the program includes:
When the first sheet size and the second sheet size match, the size of the ink droplets ejected to the sheet area is set to a size corresponding to the density of the image recorded at the landing position, and the protrusion Generating the image data in which the size of the ink droplets discharged to the region is the second ink size;
In response to the second sheet size being larger than the first sheet size, the size of the ink droplets ejected to the sheet region and the heading region is a size corresponding to the density of the image recorded at the landing position. A program for generating the image data.

Images