WO2001003937A1 - Correction de defaut d'enregistrement pour imprimante bidirectionnelle par rapport a l'inclinaison de la serie d'ajutage - Google Patents
Correction de defaut d'enregistrement pour imprimante bidirectionnelle par rapport a l'inclinaison de la serie d'ajutage Download PDFInfo
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- WO2001003937A1 WO2001003937A1 PCT/JP2000/004501 JP0004501W WO0103937A1 WO 2001003937 A1 WO2001003937 A1 WO 2001003937A1 JP 0004501 W JP0004501 W JP 0004501W WO 0103937 A1 WO0103937 A1 WO 0103937A1
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- nozzle row
- printing
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- scanning direction
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J19/00—Character- or line-spacing mechanisms
- B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
- B41J19/142—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction with a reciprocating print head printing in both directions across the paper width
- B41J19/145—Dot misalignment correction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
- B41J2/15—Arrangement thereof for serial printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/20—Modules
Definitions
- the present invention relates to a technique for printing an image on a print medium while performing bidirectional main scanning in both directions, and more particularly to a technique for adjusting a deviation of a recording position in a main scanning direction between a forward path and a backward path.
- color printers that eject several colors of ink from a head have become widespread as output devices for computers. Some of such color printers have a function of performing so-called “bidirectional printing” in order to improve printing speed.
- a normal print head has a nozzle row in which many nozzles are arranged along the sub-scanning direction.
- mechanical vibration occurs in the printing head, and the direction of the nozzle row may be slightly shifted from the sub scanning direction.
- the nozzle row may be slightly tilted in different directions between the forward path and the return path. In these cases, it is difficult to accurately determine the amount of misalignment because the nozzle array does not reciprocate as a whole while maintaining a posture perpendicular to the main scanning direction.
- the present invention has been made to solve the above-described problems in the related art.
- a printing apparatus that performs bidirectional printing, it is intended to reduce a positional shift in a main scanning direction in a forward scan and a return scan with respect to a nozzle row. It aims to provide technology. Disclosure of the invention
- the present invention includes a print head having a nozzle array for recording dots on a print medium by ejecting ink droplets arranged in the sub-scanning direction.
- a printing device that prints on a print medium while performing bidirectional main scanning in both directions, the following is performed. That is, the misalignment inspection pattern is printed on the print medium by using a representative nozzle row which is formed by a part of the nozzle row and is within a predetermined range near the center of the nozzle row. Then, a correction value for correcting the deviation of the recording position in the main scanning direction in the forward path and the return path is determined according to the correction information indicating the preferable correction state selected from the positional deviation inspection pattern.
- the “representative nozzle row within a predetermined range near the center of the nozzle row” includes a plurality of nozzles including the nozzle closest to the center position in the direction of the nozzle row and not including the nozzles at both ends of the nozzle row. Means a group of nozzles.
- the correction value is determined based on the nozzle at the end of the nozzle row, and ink droplets are recorded at the nozzle at the other end.
- the positional deviation increases.
- the correction value is determined according to correction information indicating a preferable correction state selected from the misalignment inspection patterns printed by the representative nozzle row. For this reason, the correction value is not determined based on a priori guess, but based on the misalignment inspection pattern actually printed on the print medium. For this reason, the correction value can be accurately determined so that the actual printing deviation is reduced.
- the nozzle row includes a color nozzle row in which color nozzles for discharging color ink are arranged in a predetermined order along the sub-scanning direction, and a black nozzle for discharging black ink. And a black nozzle array arranged in a predetermined order along the scanning direction.
- the memory is constituted by a part of the color nozzle array, and is a color representative nozzle within a predetermined range near the center of the color nozzle array.
- the row stores a first correction value for correcting a printing position shift in the main scanning direction in the forward path and the return path, and is formed of a part of the black nozzle row, and is provided at a predetermined position near the center of the black nozzle row.
- the positional relationship between the color nozzle row and the black nozzle row may be any.
- the recording position in bidirectional printing is determined based on the first correction value reflecting the characteristics of the color nozzle row and the second correction value reflecting the characteristics of the black nozzle row. Deviation can be corrected. That is, by having the first correction value and the second correction value, the characteristics of each of the color nozzle row and the black nozzle row can be reflected in the correction of the recording position deviation in the bidirectional printing.
- the position shift correction execution unit calculates the recording position along the main scanning direction in bidirectional printing based on the average correction value that is the average value of the first correction value and the second correction value. Is preferably corrected. In this case, color It is possible to easily correct the misalignment of the recording position in bidirectional printing in consideration of both the nozzle row and the black nozzle row.
- the position shift correction execution unit corrects the shift of the print position using the first correction value.
- the misalignment correction execution unit corrects the misalignment of the recording position using the second correction value. In this way, when performing monochrome printing, the correction can be performed with the second correction value reflecting the characteristics of the black nozzle row, and the recording position suitable for monochrome printing can be corrected.
- the position deviation correction execution unit corrects the recording position deviation using the first correction value for the color nozzle row, and corrects the recording position using the second correction value for the black nozzle row.
- the deviation may be corrected. In this way, during one printing operation, it is possible to perform the optimal correction for the color nozzle row for the single nozzle row, and to perform the optimal correction for the black nozzle row for the black nozzle row. it can.
- the color nozzle row includes a yellow nozzle for discharging yellow ink, a cyan nozzle for discharging cyan ink, and a magenta nozzle for discharging magenta ink. It is preferable that the nozzle row is constituted by a cyan nozzle or a magenta nozzle.
- the correction value is determined based on a representative nozzle row within a predetermined range near the center of the nozzle row, the main scanning of the dot recording position for the nozzles near both ends of the nozzle row is more than the nozzle near the center of the nozzle row.
- the deviation in the direction increases.
- yellow First among the cyan and magenta evenings, the deviation of the recording position is less noticeable in yellow at all, and the deviation in the recording position is more noticeable in cyan and magenta than in yellow. Therefore, as in this embodiment, if the cyan nozzle or the magenta nozzle is arranged near the center of the nozzle row and the correction value is determined as the color representative nozzle row, the deviation of the dot recording position as a whole can be reduced. It can be less noticeable.
- the present invention can be realized in various modes as described below.
- a recording medium on which a computer program for realizing the above apparatus and method is recorded is recorded.
- a data signal embodied in a carrier wave including a computer program for realizing the above apparatus and method.
- FIG. 1 is a schematic configuration diagram of a printing system including a printer 20 according to the first embodiment.
- FIG. 2 is a block diagram showing a configuration of a control circuit 40 in the printer 20.
- FIG. Explanatory drawing showing the arrangement of nozzles formed on the bottom surface of the chip 94,
- FIG. 4 is an explanatory diagram showing the principle of determining a correction value for deviation adjustment based on a test pattern
- FIG. 5 is an explanatory diagram showing a print result of a test pattern in a case where printing of a call line only in a portion of E1 in FIG. 4 is performed and a printing position is shifted in a sub-scanning direction between a forward pass and a return pass.
- Fig. 6 is an explanatory diagram showing the print result of the test pattern of the entire nozzle when the inclination of the nozzle row changes between the forward path and the return path.
- FIG. 7 is an explanatory view showing a print result of a test pattern using only the upper end nozzle when the inclination of the nozzle row changes between the forward path and the return path.
- FIG. 8 is an explanatory diagram showing a print result of a test pattern using only the central nozzle when the inclination of the nozzle row changes between the forward path and the return path.
- FIG. 9 is a flowchart illustrating a procedure for determining a correction value based on a test pattern.
- FIG. 10 is a block diagram illustrating a main configuration related to misalignment correction during bidirectional printing in the first embodiment.
- FIG. 11 is an explanatory view showing a printing head having a set head in which a plurality of nozzle units are arranged in the sub-scanning direction;
- FIG. 12 is a block diagram showing a main configuration related to misalignment correction during bidirectional printing in the second embodiment.
- FIG. 1 is a schematic configuration diagram of a printing system including an ink jet printer 20 according to a first embodiment of the present invention.
- the printer 20 includes a sub-scan feed mechanism that conveys printing paper P in the sub-scan direction by a paper feed motor 22, and a carriage 30 that moves a carriage 30 by a carriage motor 24 in the axial direction of the platen 26 (in the main scan direction). And a head that drives a print head unit 60 (also referred to as a “print head assembly”) mounted on the carriage 30 to control ink ejection and dot formation.
- the drive mechanism and a control circuit 40 that controls the exchange of signals with the paper feed motor 22, the carriage motor 24, the print head unit 60, and the operation panel 32. Have.
- the control circuit 40 is connected to a computer 88 via a connector 56.
- the sub-scanning feed mechanism that transports the printing paper P includes a gear train that transmits the rotation of the paper transport motor 22 to the platen 26 and a paper transport roller (not shown) (not shown).
- the main scanning feed mechanism for reciprocating the carriage 30 is provided between a sliding shaft 34, which is installed in parallel with the axis of the platen 26, and slidably holds the carriage 30, and a carriage motor 24.
- a pulley 38 on which an endless drive belt 36 is stretched, and a position detection sensor 39 for detecting the origin position of the carriage 30 are provided.
- the main scanning and the sub-scanning may be performed in other modes other than the above.
- the printing apparatus performs bidirectional reciprocal main scanning, which changes the relative position between the print head and the print medium while ejecting ink from the nozzles, and changes the main scanning direction between the main scanning.
- FIG. 2 is a block diagram showing the configuration of the printer 20 with the control circuit 40 at the center.
- the control circuit 40 includes an arithmetic unit including a CPU 41, a programmable ROM (PROM) 43, a RAM 44, and a character generator (CG) 45 storing a dot matrix of characters. It is configured as a logical operation circuit.
- the control circuit 40 further includes an IZF dedicated circuit 50 dedicated to interfacing with an external motor and the like, and a drive head unit 60 connected to the IZF dedicated circuit 50 to discharge ink. And a motor drive circuit 54 for driving the paper feed motor 22 and the carrier motor 24.
- the I / F dedicated circuit 50 has a built-in parallel interface circuit and can receive the print signal PS supplied from the computer 88 via the connector 56.
- Printing headunit 60 includes a mounting portion for mounting an ink cartridge containing ink, and a print head 28 which is a mechanism for discharging ink droplets.
- the entire configuration including the print head 28 and the ink cartridge mounting part is called the “print head unit 60” because the print head unit 60 is attached to and detached from the printer 20 as one part. It is. That is, when the print head 28 is to be replaced, the print head unit 60 is replaced.
- FIG. 3 is an explanatory diagram showing an array of nozzles formed on the bottom surface of the actuator chip 94 provided below the print head 28. As shown in FIG. On the bottom surface of the actuator chip 94, there are formed a color nozzle array and a black nozzle array arranged in a straight line along the sub-scanning direction.
- the term “actually” means an ink discharge mechanism including a nozzle and a driving element (for example, a piezo element or a heater) for discharging ink.
- the nozzle portion of one actuator is integrally formed by ceramic molding. If two nozzle rows are formed within one factory, the nozzles can be arranged with high accuracy, and the image quality can be improved. In this specification, the “nozzle row” is also referred to as a “nozzle array”.
- the black nozzle row has 48 nozzles # K1 to # K48. These nozzles # 1 to # 48 are arranged at a constant nozzle pitch along the sub-scanning direction.
- This nozzle pitch k is 6 dots.
- the nozzle pitch k can be set to a value obtained by multiplying the dot pitch on the print medium P by any integer of 2 or more.
- the color nozzle row includes a yellow nozzle group 94 Y, a magenta nozzle group 94 M, and a cyan nozzle group 94 C.
- the nozzle group for chromatic ink is also referred to as “chromatic nozzle group”.
- the yellow nozzle group 94 Y has 15 nozzles #Y 1 to #Y 15, and these 15 nozzles
- the pitch of the nozzle is the same as the nozzle pitch k of the black nozzle row. This is the same for the magenta evening nozzle group 94M and the cyan nozzle group 94C.
- the “X” mark between the nozzle # Y15 at the lower end of the yellow nozzle group 94Y and the nozzle # M1 at the upper end of the magenta nozzle group 94M indicates that a nozzle is formed at that position. Has not been shown. Accordingly, the distance between the nozzle # ⁇ 15 at the lower end of the yellow nozzle group 94Y and the nozzle # M1 at the upper end of the magenta nozzle group 94M is twice the nozzle pitch k. The same applies to the distance between the lower end nozzle # M15 of the magenta evening nozzle group 94M and the upper end nozzle # C1 of the cyan nozzle group 94C.
- the interval between the nozzle groups for yellow, magenta, and cyan is set to twice the nozzle pitch k.
- the nozzles of the empty nozzle groups 94Y, 94 ⁇ , and 94C are arranged at the same sub-scanning position as the nozzles of the black nozzle row 94K. However, among the 48 nozzles # K1 to # K48 of the black nozzle row 94K, the corresponding positions are for the 16th, 32nd, and 48th nozzles # ⁇ 16, # ⁇ 32, # ⁇ 48 Is not provided with a nozzle for chromatic ink.
- ink droplets are ejected from each nozzle while the print head 28 moves in the main scanning direction together with the carriage 30 (FIG. 1).
- the print head 28 moves in the main scanning direction together with the carriage 30 (FIG. 1).
- the carriage 30 moves in the main scanning direction together with the carriage 30 (FIG. 1).
- not all nozzles are always used, and only some of them may be used.
- one image is formed on a print medium by forming dots on the outward path and forming dots on the return path. For this reason, if the ink is ejected at the same recording position between the printing on the forward path and the printing on the return path, the recording must be actually performed at the same position on the print medium. No. This is because when ink is ejected aiming at the same recording position, an arbitrary point on the same image is shared between the forward path and the return path only after recording is actually performed at the same position on the print medium P. This is because a single image can be formed.
- the method of correcting the recording position deviation described here is to deliberately shift the ejection timing of ink droplets on the forward path and the return path from ⁇ theoretical timing at which dots should be recorded at the same recording position ''. Thereby, the deviation of the recording position is absorbed, and correction is performed so that dots are actually recorded at the same recording position.
- FIG. 4 is an explanatory diagram showing the principle of determining a correction value for deviation adjustment based on a test pattern.
- the printing head 28 is reciprocated in the main scanning direction without feeding in the sub-scanning direction, and during this time, the black nozzles # K1 to # K48 are printed on the printing medium ⁇ . It is printed with dots formed.
- ink droplets are ejected on the print medium so as to draw lines in the sub-scanning direction at the same interval.
- solid ⁇ lines numbered 1 to 8 are callout lines printed on the outward route.
- firewood lines are printed at various timings, i.e., at several printing positions, in order to select ⁇ a timing that allows the same call line to be recorded on the ⁇ line recorded on the outward trip. '' .
- the dashed line formed on the return trip is represented by a dashed line for convenience.
- the ink droplets are ejected at the return timing "at the timing when the same line should be theoretically recorded" when the fourth line from the left is drawn.
- the ink droplets are ejected so that the assault line formed on the return path gradually shifts to the left with respect to the line formed on the outward path. Print at a later timing. same Similarly, for the four lines from the fifth line from the left to the rightmost line, the ink droplets are ejected so that the S line formed on the return path gradually shifts to the right with respect to the line formed on the outward path. Print at an earlier timing. As a result, a test pattern as shown in FIG.
- the S lines from 1 to 8 printed on the return path are formed so that they are shifted to the right by one dot pitch with respect to the corresponding outbound S line in order from the left end. I have. Therefore, the correction value is set at an integral multiple of the dot pitch.
- the atmosphere printed on the return path is formed so as to be shifted by one dot pitch.
- the correction value is also an integer in that unit. Can be set in multiples.
- the voice line formed on the return route is indicated by a dashed line, but this is done for the sake of convenience to distinguish the ⁇ line between the outward route and the return route. It does not mean that the line is printed.
- this correction method it is not always necessary to perform printing using all the nozzles in the nozzle row as described in FIG. In other words, this correction method In other words, it is only necessary to know whether the S line drawn on the outbound path and the return path are on the same straight line.As long as that condition is satisfied, S-line printing is performed with some nozzles in the nozzle row. I just need. For example, in Fig. 4, only one of the E1 part at the upper end, the C part at the center, and the E2 part at the lower end of the firewood line was printed by a corresponding nozzle. A pattern may be formed. By doing so, the ink required for printing the test pattern can be saved.
- FIG. 5 is an explanatory diagram of a print result of a test pattern in a case where printing of a call line only in a portion E1 in FIG. 4 is performed and a printing position is shifted in a sub-scanning direction between a forward pass and a return pass.
- FIG. 5 by shifting the printing positions of the call lines on the outward and return paths in the sub-scanning direction, it becomes easier to determine the degree of coincidence of the S lines.
- the recruitment lines formed on the outbound route and the return route are both represented by solid lines.
- test pattern it is also possible to use not a vertical S line but a linear pattern in which dots are recorded intermittently.
- FIG. 6 is an explanatory diagram of a print result of a test pattern of the entire nozzle when the inclination of the nozzle row changes between the forward path and the return path.
- one of the upper end portion E1 and the lower end portion E2 is not largely displaced, and the upper end portion E1 and the lower end portion E2 are smaller.
- the displacement width is reduced uniformly. Therefore, in this embodiment, the nozzles within a predetermined range near the center of the nozzle row are set as the representative nozzle row, and for the representative nozzle row, the deviation of the recording position in the main scanning direction in the forward path and the return path is corrected. Determine the correction value.
- FIG. 9 is a flowchart showing the procedure of the deviation adjustment. This adjustment is performed by the user in principle.
- a test pattern positional deviation inspection pattern
- the method of printing the test pattern is as described in “c. Principle of Correction of Recording Position Deviation when Print Head Inclination Changes Between Forward Path and Return Path”.
- the numbers of the shift adjustment numbers (1 to 8 in FIGS. 4 to 8) are actually printed above and below the multiple pairs of vertical S lines. .
- the deviation adjustment number has a function as correction information indicating a preferable correction state.
- the “preferred correction state” means that, when the print position (or print timing) in the forward path or the return path is corrected with an appropriate correction value, the main scanning direction of the dots formed in the forward path and the return path, respectively. Refers to a state in which the positional deviation of is minimized.
- the shift adjustment numbers are assigned in ascending order from the left end. However, any number may be assigned as long as the number can identify the correction state.
- the user observes the test pattern shown in FIG. 8 and inputs the deviation adjustment number of the vertical S-line pair with the least deviation, from the user interface screen of the printer driver of the computer 88 (FIG. 2). )).
- This shift adjustment number is stored in P-ROM 43 in the printer 20.
- FIG. 10 is a block diagram showing a main configuration relating to misalignment correction during bidirectional printing in the first embodiment.
- Adjustment number storage areas 202 a and 202 b and correction value tables 206 a and 206 b are provided in the P-ROM 43 in the printer 20. .
- the first deviation adjustment number is stored in the adjustment number storage area 202a.
- a second deviation adjustment number is stored in the adjustment number storage area 202b.
- the correction value tables 206 a and 206 b store the relationship between the deviation amount (that is, the correction value) of the recording position of the vertical line in the return path in the test pattern shown in FIG. 8 and the deviation adjustment number. It is a table.
- the RAM 44 in the printer 20 stores a computer program having a function as a position shift correction execution unit 210 for correcting a position shift during bidirectional printing.
- the position shift correction execution unit 210 reads the correction value corresponding to the shift adjustment number from the correction value tables 206 a and b in the P-ROM 43.
- the position shift correction execution unit 210 Upon receiving a signal indicating the home position of the carriage 30 from the position sensor 39 (FIG. 1) on the return path, the position shift correction execution unit 210 returns a value intermediate between the first correction value and the second correction value. As an average correction value.
- the average correction A signal for instructing the recording timing of the head is supplied to the head drive circuit 52 according to the value.
- the head drive circuit 52 supplies a drive signal to the actuator chip 94, and adjusts the recording position on the return path according to the recording timing given from the positional deviation correction execution unit 210.
- the recording positions of the black nozzle row and the empty nozzle row are adjusted by the common average correction amount.
- in color printing not only color nozzles but also black nozzles are used.
- the control circuit 40 of the printer 20 (specifically, the position shift correction execution unit 210 of FIG. 10) is notified from the computer 88 (FIG. 1) that the printing is monochrome printing, It is preferable to configure so as to correct the positional deviation during bidirectional printing using only the second correction value.
- the correction value for correcting the positional deviation in the bidirectional printing is set based on the nozzle in the center portion of the nozzle row, and the correction value in the bidirectional printing is set according to the correction value. Is corrected. Therefore, even when the nozzle row has different inclinations in the forward scan and the return scan with respect to the main scanning direction, accurate correction can be performed for the entire nozzle. As a result, the print quality can be improved.
- correction is performed using the average value of the correction values (the first correction value and the second correction value) of the color nozzle row and the black nozzle row, and in monochrome printing, The correction is performed using only the black nozzle row correction value (second correction value). Therefore, optimal correction can be performed for each print mode.
- the empty nozzles are arranged in the sub-scanning direction in the order of the cyan nozzle group 94 C, the magenta evening nozzle group 94 M, and the yellow nozzle group 94 Y. Therefore, printing of the test pattern is performed using the central magenta nozzle group 94M. Therefore, in the case of magenta, where the deviation of the recording position is more conspicuous than that of the yellow, correction is made so that the deviation of the dot recording position becomes smaller. At the end where the deviation of the recording position of the dot is larger than that at the center, the yellow nozzle group 94 Y where the deviation of the recording position is less noticeable is arranged at one end. It is not noticeable even if it shifts.
- the color representative nozzle row for printing the test pattern is a magenta evening nozzle row.
- the color representative nozzle row is not limited to this, and a predetermined range near the center of the nozzle row is not limited thereto. As long as the nozzle is located inside, the same effect can be obtained even with a cyan nozzle. Further, even if the yellow nozzle is used as a color representative nozzle row, it is possible to correct the recording position deviation.
- the representative nozzle row for printing the test pattern is the nozzle row located at the portion C shown in FIG. 6 among all the nozzles in the nozzle row, but the representative nozzle row is not limited to this. Not something.
- the representative nozzle row is a nozzle row including the nozzle closest to the center position in the direction of the nozzle row arrangement, and may be a nozzle row composed of approximately 1/2 of the total number of nozzles in the nozzle row. Further, it is more preferable that the nozzle row is composed of approximately 1 Z3 nozzles of the total number of nozzles in the nozzle row.
- the representative nozzle row is not necessarily the center of the nozzle row in the direction of the arrangement of the nozzle rows. Need not be evenly distributed.
- the representative nozzle row can be a group of nozzles within a predetermined range near the center of the nozzle row.
- the nozzle row includes the nozzle closest to the center position in the direction of the nozzle row, It can be a group of nozzles that does not include the nozzles at both ends of the row.
- the simple correction of the correction values (the first correction value and the second correction value) of the color nozzle row and the black nozzle row is performed.
- the correction was performed using the average value (intermediate value).
- the method of obtaining the average correction value is not limited to this, and the average correction value is obtained from the weighted average of the first correction value and the second correction value. You may.
- the first correction value and the second correction value are considered in consideration of the frequency of use of the yellow, cyan, and magenta color inks and the black ink, the distance from the center of the nozzle row, and the conspicuousness of the recording position deviation.
- An average may be obtained by weighting each of the correction values, and this may be used as the average correction value.
- the correction is performed using the average value of the first correction value and the second correction value in the color printing. In color printing, the correction may be performed using only the correction value (first correction value) of the color nozzle row. That is, the recording position deviation is corrected based on the first and second correction values in the main scanning direction during bidirectional printing regardless of how the first and second correction values are used. What is necessary is just to correct the deviation of the recording position along the line.
- the method using the average value of the first correction value and the second correction value as in the present embodiment is a correction method suitable for a case where a black nozzle is also used in color printing.
- the print head unit 60 correction of the recording position deviation is performed for a printing apparatus in which one actuator controls a nozzle in which 48 nozzles are arranged in the sub-scanning direction. went.
- the printing apparatus capable of correcting the positional deviation according to the present invention is not limited to such a printing apparatus, and a plurality of printing apparatuses as shown in FIGS. 11 (a) and 11 (b) are not limited.
- the present invention can also be applied to a printing apparatus in which the evening chips are arranged in the sub-scanning direction and a number of nozzles Nz are arranged in the sub-scanning direction.
- a plurality of nozzle units arranged side by side in the sub-scanning direction form a collective head 96a to 96d, and each of the collective heads 96a to 96d It is responsible for the ejection of black (K), cyan (C), yellow (M), and yellow (Y) inks. like this
- the nozzles Nzc located within a predetermined range near the center of the nozzle row of the collective head in the sub-scanning direction are set as representative nozzles, and the nozzles are misaligned on the print medium using them. It is possible to print the inspection pattern, determine the correction value, and correct the recording position.
- the printing apparatus since the nozzle rows are arranged long in the sub-scanning direction, a slight deviation in the inclination of the nozzle rows results in a large positional deviation at both ends of the nozzle rows. For this reason, it is particularly effective for such a printing apparatus to correct the recording position deviation as in the present invention.
- the printing apparatus having such a nozzle arrangement has an advantage that a printing speed is high because many dots can be formed by one main scan.
- FIG. 12 is a block diagram showing a main configuration relating to misalignment correction during bidirectional printing in the second embodiment.
- the difference from the configuration shown in Fig. 10 is that the actuator chip 95a for discharging black ink to the black nozzle row, the head drive circuit 52a for driving it, and the cyan and magenta chips for the empty nozzle row In the evening, there is provided an independent chip 95b for discharging each ink of yellow and a head driving circuit 52b for driving the same. That is, the two head drive circuits 52a and 52b independently drive the actual chips 95a and 95b, respectively. For this reason, a recording evening instruction from the positional deviation correction execution unit 210 can also be given independently to each of the head drive circuits 52a and 52b. Therefore, misregistration correction during bidirectional printing can also be performed for each chip.
- the second embodiment is characterized in that the correction value can be set independently for each chip. In this way, the positional deviation can be corrected for each tip of the nozzle, so that a finer correction can be made for each nozzle group corresponding to the tip of the tip. The position can be corrected, and as a result, the positional deviation during bidirectional printing can be further reduced.
- the dot recording position changes when the ejection speed of the ink droplet ejected from the nozzle row changes. That is, if there is a variation in the ejection speed of the ink droplet, the dot recording position will be shifted correspondingly.
- the ejection speed of the ink droplet ejected from each nozzle row changes depending on various factors as described below.
- the main factor of the ink droplet ejection speed is a manufacturing error of the actuator tip, the ejection speed of the ink droplet ejected from the same actuator tip is almost the same. Therefore, in this case, it is preferable to correct the deviation of the recording position in the main scanning direction for each group of the nozzle rows driven by different factor chips.
- the deviation of the dot recording position in the main scanning direction is corrected for each ink or nozzle row. Is preferred.
- the correction value is independently set for each nozzle group that can independently correct the ink droplet ejection timing. This makes it possible to further reduce the positional deviation as compared with the above-described embodiment. Further, the correction value may be set independently for each group of nozzle arrays that eject the same ink. For example, a specific When two sets of nozzle rows for ejecting ink are provided, the same correction value may be applied to the two sets of nozzles.
- the positional deviation is corrected by adjusting the dot recording position (or recording timing).
- the positional deviation may be corrected using other means. .
- the positional deviation was corrected by adjusting the recording position (or recording timing) on the return path.
- the positional deviation was corrected by adjusting the recording position on the outward path. Is also good.
- the position deviation may be corrected by adjusting both the recording positions of the forward path and the return path. That is, in general, it is sufficient to correct the positional deviation by adjusting at least one of the recording positions of the forward path and the return path.
- the ink jet printing was described.
- the present invention is not limited to the ink jet printing, and is generally applicable to various printing apparatuses that perform printing using a print head.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00944294A EP1112851B1 (en) | 1999-07-08 | 2000-07-06 | Misregistration correction for bidirectional printing in consideration of inclination of nozzle array |
DE60027995T DE60027995T2 (de) | 1999-07-08 | 2000-07-06 | Falschregistrierungskorrektur für das drucken in zwei richtungen unter berücksichtigung des neigungswinkels der düsenreihe |
US09/786,335 US6554387B1 (en) | 1999-07-08 | 2000-07-06 | Misregistration correction for bidirectional printing in consideration of inclination of nozzle array |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/193903 | 1999-07-08 | ||
JP19390399A JP3480374B2 (ja) | 1999-07-08 | 1999-07-08 | ノズル列の傾きを考慮した双方向印刷の位置ズレ補正 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/786,335 A-371-Of-International US6554387B1 (en) | 1999-07-08 | 2000-07-06 | Misregistration correction for bidirectional printing in consideration of inclination of nozzle array |
US10/306,223 Continuation US6726303B2 (en) | 1999-07-08 | 2002-11-29 | Correction of positional misalignment in bidirectional printing by taking into account inclination of nozzle array |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001003937A1 true WO2001003937A1 (fr) | 2001-01-18 |
Family
ID=16315668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/004501 WO2001003937A1 (fr) | 1999-07-08 | 2000-07-06 | Correction de defaut d'enregistrement pour imprimante bidirectionnelle par rapport a l'inclinaison de la serie d'ajutage |
Country Status (6)
Country | Link |
---|---|
US (2) | US6554387B1 (ja) |
EP (1) | EP1112851B1 (ja) |
JP (1) | JP3480374B2 (ja) |
AT (1) | ATE326349T1 (ja) |
DE (1) | DE60027995T2 (ja) |
WO (1) | WO2001003937A1 (ja) |
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JP2003274143A (ja) * | 2002-03-15 | 2003-09-26 | Fuji Xerox Co Ltd | 画像形成装置およびその方法 |
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JP6700652B2 (ja) | 2014-05-30 | 2020-05-27 | ブラザー工業株式会社 | インクジェットプリンタ |
CN104228370A (zh) * | 2014-08-25 | 2014-12-24 | 深圳怡化电脑股份有限公司 | 一种针式打印机的回差测量方法及回差测量尺 |
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-
1999
- 1999-07-08 JP JP19390399A patent/JP3480374B2/ja not_active Expired - Fee Related
-
2000
- 2000-07-06 EP EP00944294A patent/EP1112851B1/en not_active Expired - Lifetime
- 2000-07-06 US US09/786,335 patent/US6554387B1/en not_active Expired - Lifetime
- 2000-07-06 WO PCT/JP2000/004501 patent/WO2001003937A1/ja active IP Right Grant
- 2000-07-06 DE DE60027995T patent/DE60027995T2/de not_active Expired - Lifetime
- 2000-07-06 AT AT00944294T patent/ATE326349T1/de not_active IP Right Cessation
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2002
- 2002-11-29 US US10/306,223 patent/US6726303B2/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
DE60027995D1 (de) | 2006-06-22 |
US20030085937A1 (en) | 2003-05-08 |
ATE326349T1 (de) | 2006-06-15 |
JP3480374B2 (ja) | 2003-12-15 |
EP1112851A1 (en) | 2001-07-04 |
US6726303B2 (en) | 2004-04-27 |
EP1112851B1 (en) | 2006-05-17 |
US6554387B1 (en) | 2003-04-29 |
EP1112851A4 (en) | 2003-01-08 |
DE60027995T2 (de) | 2007-04-19 |
JP2001018375A (ja) | 2001-01-23 |
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