JPH11298646A - Printer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect unapt printing before all the printing paper sheet is all printed. SOLUTION: This printer system is provided with a printer engine 20 and a scanner part 24. A recording sheet P1 is supplied to the side of the printer engine 20 by a paper guide roller 421. The recording sheet P1 is conveyed toward an eject port 45 by rotating a driving roller 43 and driven rollers 44a, 44b and 44c. Based on inputted pixel data, an image is printed on the recording sheet P1 by a printing head 48 of the printer engine 20 while moving in the breadthwise direction of the recording sheet P1 at a printing position M1. The scanner part 24 is provided with a line sensor 50, a light source 52 and an optical scanner system 54. A read position M2 for the scanner part 24 is provided between the printing position M1 and the eject port 45. The scanner part 24 read the printed image. When the error between the pixel data of a correspondent pixel and the read data of the printed image is more than a fixed level, printing is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer for printing, for example, a digital color image.

[0002]

2. Description of the Related Art In recent years, with the development of image processing technology, printer devices for printing digital images have become widespread. The digital image is represented, for example, as a set of pixels arranged in a grid, and the numerical value of each pixel is recognized as pixel data. In a printer device, a digital image (hereinafter, referred to as an image) is processed, for example, for each of a predetermined number of pixels arranged in a line, that is, for each line. First, an image for a predetermined line is printed, and then the recording sheet is conveyed by a predetermined amount in a direction perpendicular to the line, and the next predetermined line is printed. Such printing and transporting for each line are repeated, and the entire image is printed on the recording sheet. The recording sheet on which the digital image is printed is discharged out of the apparatus from the discharge port.

[0003]

In such a printer, the printing result is visually determined after the recording sheet is discharged from the discharge port, that is, after printing is completed. Therefore, even when improper printing is performed due to ink exhaustion or the like, determination cannot be made until all printing is completed, and a useless printing operation is performed. Unless each recording sheet is checked one by one in continuous printing, a large number of recording sheets will be wasted if improper printing is performed during printing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printer capable of detecting improper printing before printing of all images is completed.

[0005]

According to the present invention, there is provided a printer device comprising: a storage unit for storing at least one pixel data of electrical information of each pixel of an image having a plurality of pixels; Data conversion means for converting pixel data of each pixel into print data based on the obtained pixel data, and print data corresponding to a predetermined number of pixels arranged along a first direction set on the image; A unit print data generating unit for generating unit print data based on the unit print data; a printing unit for performing unit print for printing in one direction on a recording sheet based on the unit print data; A conveying means for conveying the recording sheet by a predetermined amount in the direction, and reading an image on the unit-printed recording sheet to a predetermined number of pixels arranged in the first direction. Reading means for generating read data which is electrical information to be read, detecting means for detecting an error between the read data and pixel data corresponding to the read data, generation of unit print data, unit printing, and transport. Control means for printing the entire image by repeatedly generating unit read data and detecting an error, and when the error is equal to or higher than a predetermined level, the control means stops the printing operation by the printing means. Features.

[0006] The printer device preferably has an outlet for discharging the recording sheet printed by the printing unit, and the reading unit is preferably provided between the printing unit and the outlet.

[0007] It is preferable that the printing operation is stopped when the ratio of the number of pixels whose error differs by a predetermined value or more from the number of pixels arranged in the first direction exceeds a predetermined value.

[0008] The printer device may be provided with display means for displaying the error and the position of the pixel where the error occurs when the error is equal to or higher than a predetermined level.

Preferably, in the printer, the reading means includes a line sensor.

In the printer device, when the image stored by the storage means and the image printed on the recording sheet are digital color images, pixel data and read data are R (red), G (green), B (blue). , Respectively.

In the printer device, the print data is Cy.
(Cyan), Mg (magenta), Ye (yellow), B
It may be represented by k (black). In this case, the image printed on the recording sheet is Cy, Mg, Ye, and Bk.
This is a color image reproduced by color inks, and the printing means performs a single color printing with each color ink of a predetermined number of pixels arranged in the first direction in a superimposed manner, so that the color of the predetermined number of pixels is The image is reproduced on the recording sheet.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printer according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing an example of a digital image printed by a printer device. In the image, the area is m
It is divided into × n (m, n is a natural number; m <n) square areas, that is, pixels. The direction in which m pixels are arranged is the horizontal direction (indicated by arrow X), and the direction perpendicular to the horizontal direction, that is, n
The direction in which the pixels are arranged (indicated by arrow Y) is the vertical direction. The uppermost m pixel columns arranged in the horizontal direction and the line L _1, the following m pixel column line L ₂ a, ..., and m pixel column of the lowermost line Ln. The position of the i-th pixel from the left and the j-th pixel from the top is indicated by an address A _ij .

FIG. 2 is a diagram showing pixel data when the image shown in FIG. 1 is a color image in a two-dimensional array corresponding to the image of FIG. The image is decomposed into RGB color components, and is represented by RGB component values at each pixel. Address A _ij
Is R _ij, and similarly, the G component value is G _ij ,
_{Let the} B component value be B _ij . The components are put together in an m × n matrix, and the three component matrices are arranged in parallel. That is, m
For an image of × n pixels, each component value is m × n, for a total of 3 ×
It has m × n pixel data. Fig. 2
3 × m × n pixel data shown in FIG. In addition,
Actually, in the image memory (FIG. 5) of the printer device,
The image data is stored in a one-dimensional array according to a predetermined rule.

FIG. 3 is a diagram showing print data in a two-dimensional array. The printer device performs ink-jet type color printing. In this case, four color inks of Cy (cyan), Mg (magenta), Ye (yellow), and Bk (black) are used, and various colors are mixed for one pixel by changing the ink amount. Reproduce. Therefore, pixel data represented by three components of R, G, and B (FIG. 2)
Is converted into print data (FIG. 3) represented by four components of Cy, Mg, Ye, and Bk. The printer controls the ink amount of each color based on the print data.

The print data has 4 × m × n component values. The component array of the print data is the same as the pixel data array, and a description thereof will be omitted. The Cy component value at the pixel at the address A _ij is Cy _ij , the Mg component value is Mg _ij , the Ye component value is Ye _ij , and the Bk component value is Bk _ij . The component values Cy _ij , Mg _ij , Ye _ij , and Bk _ij of each pixel are obtained based on the corresponding component values R _ij , G _ij , and B _ij, and the component values R _{i (j + 1) of the} adjacent pixels are obtained. , Gi _{(j + 1)} and _{Bi (j + 1)} .

FIG. 4 is a plan view showing the recording sheet P1 when an image is reproduced and printed based on the above-mentioned print data. On the basis of the print data shown in FIG.
e, Bk ink amounts are determined, and each line is Cy, M
g, Ye, and Bk are printed in this order. That is, the recording sheet P
One line of the color image in 1 is composed of one line of the Cy component, one line of the Mg component, one line of the Ye component, and one line of the Bk component, for a total of four lines.

First, print data Cy _{11 to} Cy of line L ₁
Based on the _m1, the ink amount of cyan is determined, cyan from the left end along the width direction of the line L ₁ towards the right end of the recording sheet P1 is printed on the recording sheet P1. Then M
One line of magenta is printed on the image on which cyan is printed based on g _{11 to} Mg _m1 . The same applies to yellow and black printing. In this way, four colors are printed in a superimposed manner. By the four printings, one is printed on the recording sheet P1.
A color image for the line is reproduced.

First, from the left end to the right end, that is, the arrow X
Image is printed directions of the line L ₁ of. Then the recording sheet P1 by the conveying means described later is sent to FIG upper by one line (the direction of arrow Y), it is printed a line L ₂ toward the right end from the left again. As described above, the printing of one line and the transport of one line in the vertical direction are repeated n times, so that an image of m × n pixels is printed on the recording sheet P1.

The width direction of the recording sheet P1 coincides with the horizontal direction (arrow X) set on the image, and the longitudinal direction of the recording sheet P1 and the transport direction of the recording sheet P1 match the vertical direction (arrow X) set on the image. Y).

FIG. 5 is a block diagram showing a circuit configuration of the printer device according to the embodiment. The printer device 10 includes a system control circuit 12, which controls the entire printer device 10. Each circuit connected to the system control circuit 12 operates according to a command signal from the system control circuit 12.

The system control circuit 12 includes an LC
A display device 28 made of D and an operation switch 30 are connected. The display device 28 displays various setting values of the printer device 10, setting information, messages for the operator, and the like. The manual operation of the operation switch 30 gives an instruction to turn on the power to the printer device 10 or to start printing.

The printer device 10 is SCSI-connected to an external device such as a camera by a cable (not shown).
Pixel data and the like are transferred to the printer 10 via this cable.
Is forwarded to The printer device 10 includes a SCSI connector 14 for connecting a cable, and a SCSI controller 16 for obtaining pixel data via the SCSI connector 14. SCSI connector 14 and SCS
Pixel data obtained via the I controller 16 is stored in the image memory 1 according to a command from the system control circuit 12.
8 is temporarily stored. The image memory 18 has a capacity enough to store pixel data for one image.

A print data generation circuit 19 is connected to the system control circuit 12. Print data generation circuit 1
In 9, each time a predetermined pixel data group is output, unit print data is generated and output to the printer engine 20.
In the case of color image printing as in the present embodiment, Cy, Mg, Ye, Bk of the recording sheet are obtained from a predetermined pixel data group.
Unit print data corresponding to a total of 4 × m component values for one line of each color is obtained. Under the control of the printer engine 20, this unit print data is supplied to the print head 48,
A predetermined amount of image is printed on the recording sheet P1 along the horizontal direction.

The system control circuit 12 includes an illumination light source driving circuit 25 and a line sensor driving circuit 26.
Is connected. The illumination light source driving circuit 25 includes the scanner unit 2.
The fourth light source 52 is turned on and off. Further, the line sensor driving circuit 26 controls an output operation of a pixel signal of a print image generated in the line sensor 50 of the scanner unit 24 and the like. The analog pixel signal output from the line sensor 50 is
The signal is amplified by the amplifier 32 and converted into a digital signal by the A / D converter 34. The digital pixel signal is subjected to correction such as shading correction and gamma correction in the image processing circuit 36, and is output to the system control circuit 12 as read data.

In the system control circuit 12,
The read data and the pixel data in the image memory 18 are compared at the pixel at the same address of the image. If it is determined that the difference value between the pixel data and the read data is equal to or higher than a certain level, that is, an error has occurred, the display device 28 displays a message indicating the error amount (difference value) and the address of the pixel where the error has occurred. And a stop signal to the printer engine 20 is output to stop printing.

FIG. 6 is a perspective view showing the configuration of the printer engine 20 and the scanner section 24. Printer device 10
Has a housing (not shown), and a discharge port 45 for discharging the recording sheet P is formed on one side surface of the housing. A large number of cut sheet-shaped recording sheets P are stacked in the housing and held by a tray (not shown). The paper guide roller 421 is in contact with the upper surface of the stacked recording papers P, and the uppermost recording sheet P1 is conveyed toward the discharge port 45 by the rotation of the paper guide roller 421. An ink jet printer engine 20 is provided near the transport path between the tray and the discharge port 45.

The printer engine 20 includes a stepping motor (not shown), a pair of driving rollers 43 driven by the stepping motor, and driven rollers 44a and 44.
b, 44c. The stepping motor drives the drive roller 43 at predetermined time intervals during printing according to the drive pulse output from the system control circuit 12. The driven rollers 44a, 44b, 44c are in elastic contact with the recording sheet P1 at the set position, and rotate in the forward and reverse directions as the recording sheet P1 is conveyed.

The driven roller 44b is provided with an encoder (not shown), and this encoder is connected to the system control circuit 12. As a result, the actual recording sheet conveyance amount and speed are detected by the system control circuit 12.

The print head 48 of the printer engine 20
Is opposed to one surface of the recording sheet P1 on the conveyance path. The print head 48 is configured as an ink jet type line print head, and
That is, it can move along the horizontal direction. Print head 48
Is provided with an ejection nozzle for ejecting ink, and the ink is ejected from the ejection nozzle at a predetermined timing along with the movement in the horizontal direction, so that dot recording is performed on the recording sheet P1 and printing in the horizontal direction is performed. . Print head 48
The position in the vertical direction at which printing is performed is defined as a print position M1.

FIG. 7 is a side view of the print head 48. The print head 48 has ejection nozzles 49a, 49b, 49c, and 49d for ejecting four color inks, that is, cyan, magenta, yellow, and black, toward recording paper.
Are provided along the vertical direction. The amount of ink ejected from each ejection nozzle is determined in accordance with the print data. The injection direction of each of these injection nozzles is finely adjusted so as to coincide in the vertical direction. That is, the transport amount of the recording sheet P1 for each print of the predetermined line is equal to the vertical inter-dot distance Wd printed by each ejection nozzle.

[0032] When the recording sheet P1 is set to the print start position, print head 48 is moved in the horizontal direction, the cyan component of the line L ₁ are printed by the injection nozzle 49a in accordance with this movement. After the printing of cyan, the print head 48 is returned to the original position, and the recording sheet P1 is conveyed by one line and stopped. Then, the print head 48 is moved in the horizontal direction again, along with the cyan component of the line L ₂ are printed by the injection nozzle 49a, the line by the injection nozzle 49b L
_One magenta component is printed. And the print head 48
There is returned to its original position, after the recording sheet P1 is conveyed by one line, moves in the horizontal direction again print head 48, the cyan component of the line L _3, magenta component of the line L _2, the yellow line L ₁ The components are printed. Print head 48
There is returned to its original position, after the recording sheet P1 is conveyed by one line, the print head 48 is moved in the horizontal direction again, the cyan component of the line L _4, magenta component of the line L _3, the yellow line L ₂ black component ingredients and the line L ₁ is printed. Here, the printing line L ₁ is completed.

As described above, the printing of the four colors proceeds simultaneously, but the print data shifted by one line is sent to each of the injection nozzles 49a, 49b, 49c, and 49d.

One horizontal movement of the print head 48
The printing accompanying the
Data as unit print data. For example, first, the recording sheet P
1 line L to be printed₁Cy in_i1(1 ≦ i ≦ m)
Is the first unit print data. Second unit print data
Is the line L_TwoCy_i2And line L₁Mg_i1It is.
The third unit print data is line L_ThreeCy_i3And line L
_TwoMg_i2And line L ₁Ye_i1It is. The k-th (4 ≦ k
≦ n−4) is a line L_kCy_ikWhen
Line L_k-1Mg_{i (k-1)}And line L_k-2Ye_{i (k-2)}
And line L _k-3Cy_{i (k-3)}It is. Printer En
Under the control of the gin 20, the unit print data is stored in the print head.
The recording sheet is supplied to the recording sheet 48 (FIG. 6) and is
Full color printing on the The unit print data is
There is no need to use one line for each color.
Alternatively, the print data may be used as unit print data. In this case, the recording system
The unit transport amount of the sheet is for a plurality of lines.

Referring again to FIG. The scanner unit 24
It is provided between the print head 48 and the discharge port 45 in the vertical direction. The scanner unit 24 includes a line sensor 50, a light source 52, and a scanner optical system 54, which are fixed to a support frame (not shown) of the printer device 10. The line sensor 50 is disposed at a position facing the recording surface of the recording sheet P1 and along the horizontal direction, and electrical optical information on the recording sheet P1 along the horizontal direction, that is, the reading position M
2, the pixel information of the print image on the recording sheet P1 is obtained. The line sensor 50 is a CCD one-dimensional sensor having m pixels. The reading position M2 is located at a position separated by d lines (d <n) from the printing position M1. Determination of whether the line L ₁ has reached the reading position M2 is performed by the sensor 56.

The light source 52 is a white light emitting tube which is disposed on the same side as the line sensor 50 with respect to the recording sheet P1 and extends in the same direction as the line sensor 50, that is, extends in the horizontal direction. Parallel white light is emitted from the light source 52 toward the recording sheet P1.

The scanner optical system 54 is provided between the recording sheet P1 and the line sensor 50 and on the optical path of the reflected light. The optical information of the recording sheet P1 at the reading position M2, that is, the printed image is illuminated by the light source 52,
The scanner optical system 54 forms an image on the light receiving surface of the line sensor 50 on which the photoelectric conversion element group is provided. The pixel signal output from the line sensor 50 is subjected to the above-described processing and sent to the system control circuit 12 as read data.

As shown in FIG. 8, each pixel of the line sensor 50 is provided with a stripe filter 502 in which R, G, and B color filter elements are regularly arranged in the horizontal direction.
The image from the scanner optical system 54 is decomposed into RGB color component components. That is, when the line L ₁ on the recording sheet P1 is set at the reading position M2 (FIG. 6), the line sensor 5
On the light receiving surface of 0, R component of the pixel A _11, G component of the pixel A _21, B component of the pixel A _31, a print image of the RGB components is imaged by three pixels cycle, thereby reading data generated Is done.

FIG. 9 shows the read data. The read R component value is R ′ _ij (1 ≦ i ≦ m, 1 ≦ j ≦ n), the G component value is G ′ _ij , and the B component value is B ′ _ij . R component value in the line L ₁ are read every three pixels from the left. Similarly, the G component value and the B component value are read every three pixels.

The read data is stored in the system control circuit 1
At 2, the pixel data is compared with the pixel data of the same component at the same address. For example, R component value R ₁₁ of R component value R _'11 of the read data of the address A _11, the pixel data (Fig. 2)
Is obtained. If the difference value is equal to or greater than a predetermined level, it is recognized that an error has occurred. Next, G ′ ₂₁ and G ₂₁ , B ′ ₃₁ and B ₃₁ ,... Are sequentially compared to determine whether an error has occurred. After comparing all the pixels of the line L ₁ is performed, occurrence rate of the error is determined during one line. If the error occurrence ratio is equal to or greater than the predetermined value, the system control circuit 12 outputs a print stop signal to the printer engine 20.

The timing of printing and reading will be described. A drive signal is output from the system control circuit 12, the stepping motor rotates forward, the recording sheet P1 is conveyed by a predetermined amount to the printing start position by the forward rotation of the stepping motor, and the printing operation is started.

[0042] to a position where the print head 48 can print a line L ₁ to the recording sheet P1, the recording sheet P1 is conveyed, it is repeated and transporting the unit printing as described above. After the unit print the conveyance and are repeated d times, the line L ₁ of the printed image is determined to have moved to the reading position M2. At the same time the cyan line L _{d + 1} is printed in the printing position M1, the line L ₁ of the printed image in the reading position M2 is read by the line sensor 50. The recording sheet P1 is illuminated by the light source 52, and the reflected light is condensed by the scanner optical system 54 to form an image on the light receiving surface of the CCD of the line sensor 50. The line sensor 50 is controlled by a command from the system control circuit 12.
There when driven, photoelectrically converted information of the RGB components of the line L ₁ in the CCD is output to the system control circuit 12 as the read data.

The system control circuit 12 compares the pixel data of the line L ₁ stored in the image memory 18 with the read data of the line L ₁ read from the scanner unit 24. If the system control circuit 12 determines that the difference value between the two corresponding data is equal to or more than a certain level, it determines that printing is inappropriate and sends a command signal to the printer engine drive circuit 22 to stop the printing operation and A warning is displayed on the display device 28 to notify the operator.

That is, the line L is placed at the reading position M2.₁Is located
The line L is located at the print position M1. _{1 + d}Is located
Line L at the timing when the conveyance of the recording sheet P1 is stopped.
₁Reading and error detection, and line L_{1 + d}The cyan component of
And printing are performed simultaneously. Must be judged improper printing
Then, one line is transported again, and the next line is
The same operation is performed. Recording sheet as above
Printing of all print data and error detection on P1 are completed.
Then, the recording sheet P1 is discharged to a position where it can be manually pulled out.
It is discharged from the outlet 45.

FIGS. 10 and 11 are flowcharts showing the improper print detection processing in the system control circuit 12. FIG.

The printing from the line L ₁ by the printer engine 20 is started in step S102. Line L ₁ of the print image at step S104 whether moved to the reading position M2 of the scanner unit 24 is determined. Step S104 continues to be executed until the line L ₁ becomes the reading position M2, the line L ₁ becomes the reading position M2, the step S106 is executed.

In step S106, ₁ of line L1
Only line is read by the scanner as the reading data, the corresponding line, i.e. pixel data line L ₁ are read from the image memory 18 in step S108. Then, in step S110, the R, G, and B component values are compared for each corresponding pixel as described above. That is, in each pixel, the R component value of the read data or the G and B component values
A difference value obtained by subtracting the component values or the G and B component values is obtained.

In step S112, it is determined whether or not the difference value of each pixel is below a predetermined level.
In any of the pixels of the line L _1, R (or G,
If the difference value of the component B) exceeds the predetermined level, it is determined that an error has occurred, and step S120 is executed.

In step S120, the pixel and component in which the error has occurred, the magnitude of the error, and the rate of occurrence of the error in the line being compared (line L1) are determined. Further, in step S122, it is determined whether or not the error occurrence rate obtained in step S120 is equal to or higher than a predetermined level. If it is higher than the predetermined level, step S
The pixel and component in which the error has occurred at 124;
The magnitude of the error is displayed on the display device 28, and step S1
At 18, the printing operation is stopped, and the process ends.

[0050] In step S112, R (or G, B) in all the pixels of the line L ₁ if the difference value of the components below the respective predetermined level step S114 is executed. Further, when the error occurrence rate of the line L ₁ is determined to be below a predetermined level in step S122, step S114 is executed. Step S114
It is determined whether the error check has been completed for all the lines, that is, the line Ln. Since it is only the check lines L ₁ in step S114, in this case the step S116 is executed. The recording sheet P1 in step S116 the next line, that is, whether the line L ₂ has been transferred to a position at the reading position M2 is determined. Step S116 is repeatedly executed until the position to the line L ₂ is read position M2.

[0051] When the line L ₂ is determined to be located at the reading position M2 in step S116, step S10
6 is executed for the line L ₂ from. As described above, steps S106 to S114 are executed n times unless the error is equal to or higher than the predetermined level during printing and printing is not stopped. Step S10 for all lines
When Step S114 is performed from Step 6, Step S114
To step S118, the printing operation is stopped,
The improper print detection process ends.

As described above, according to the printer device of the present embodiment, since the scanner unit 24 is provided on the print head 48 side from the discharge port 45, improper printing due to an error of the printer device 10 such as ink shortage occurs. Is performed, the inappropriateness is detected before the recording sheet P1 is discharged.
Therefore, unnecessary operation of the printer device 10 is reduced, and the time required for printing and the like are saved. Further, in the case of improper printing in the middle of printing in continuous printing or the like, printing can be stopped immediately, and the recording sheet P is not wasted.

[0053]

As described above, according to the present invention, improper printing can be detected before printing of all images is completed, and waste of recording sheets can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an image input to a printer device.

FIG. 2 is a diagram two-dimensionally showing pixel data of the image shown in FIG. 1;

FIG. 3 is a diagram two-dimensionally showing print data of the image shown in FIG. 1;

FIG. 4 is a plan view showing a recording sheet printed by a printer device.

FIG. 5 is a block diagram illustrating an embodiment of a printer device according to the present invention.

FIG. 6 is a perspective view showing a configuration of a printer engine and a scanner shown in FIG.

FIG. 7 is a side view showing the print head shown in FIG. 6 together with a recording sheet.

8 is a diagram showing a film of the line sensor shown in FIG. 6 together with a recording sheet.

FIG. 9 is a diagram two-dimensionally showing read data read by the line sensor shown in FIG. 6;

FIG. 10 is a flowchart showing a main part of an improper print detection processing routine in the printer shown in FIG. 5;

FIG. 11 is a flowchart showing a part of an improper print detection processing routine in the printer shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Printer apparatus 20 Printer engine 24 Scanner part 43 Drive roller 44a, 44b, 44c Follower roller 45 Discharge port 48 Print head 50 Line sensor 52 Light source 54 Scanner optical system P, P1 Recording sheet

Claims (8)

[Claims] A storage unit configured to store pixel data, which is electrical information of each pixel, of at least one image in an image including a plurality of pixels, based on pixel data obtained from the storage unit, Data conversion means for converting the pixel data in the pixels into print data, and a unit print data based on the print data corresponding to a predetermined number of pixels arranged in a first direction set on the image. A unit print data generating unit for generating, a printing unit for performing unit printing for printing in one direction on a recording sheet based on the unit print data, and a printing direction in a direction different from a printing direction in the unit printing after the unit printing is completed Conveying means for conveying the recording sheet by a fixed amount; a predetermined number of pixels arranged along the first direction by reading an image on the unit-printed recording sheet; A reading unit that generates read data that is electrical information in the read data; a detection unit that detects an error between the read data and pixel data corresponding to the read data; a generation of the unit print data; and the unit printing. Control means for printing the entire image by repeatedly performing the conveyance, generation of the unit read data, and detection of the error, and when the error is equal to or more than a predetermined level, the control means controls the printing means. Wherein the printing operation by the printer is stopped. 2. The printer device according to claim 1, further comprising a discharge port from which the printed recording sheet is discharged, wherein the reading unit is provided between the printing unit and the discharge port. 3. The method according to claim 1, wherein the printing operation is stopped when a ratio of the number of pixels in which the error differs by a predetermined value or more with respect to the number of pixels arranged along the first direction exceeds a predetermined value. The printer device according to claim 1, wherein: 4. The printer device according to claim 1, further comprising a display unit that displays the error and a position of a pixel where the error occurs when the error is equal to or higher than a predetermined level. 5. The printer according to claim 1, wherein said reading means includes a line sensor. 6. An image stored by said storage means and an image printed on said recording sheet are color images, and said pixel data and said read data are R
2. The printer device according to claim 1, wherein the printer device is represented by three color component components of (red), G (green), and B (blue). 7. The print data is Cy (cyan), M
g (magenta), Ye (yellow), Bk (black)
The printer device according to claim 1, wherein the printer device is represented by the following four color component components. 8. An image printed on the recording sheet is C
a color image reproduced by four color inks of y, Mg, Ye, and Bk, wherein the printing unit performs single-color printing with a predetermined number of pixels of each color ink arranged in the first direction in an overlapping manner; The color image of the predetermined number of pixels is thereby reproduced on the recording sheet.
The printer device according to 1.