EP0589718B1 - Verfahren zum Ausrichten von Schreibstiften - Google Patents

Verfahren zum Ausrichten von Schreibstiften Download PDF

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Publication number
EP0589718B1
EP0589718B1 EP19930307586 EP93307586A EP0589718B1 EP 0589718 B1 EP0589718 B1 EP 0589718B1 EP 19930307586 EP19930307586 EP 19930307586 EP 93307586 A EP93307586 A EP 93307586A EP 0589718 B1 EP0589718 B1 EP 0589718B1
Authority
EP
European Patent Office
Prior art keywords
alignment
pen
pattern
user
printed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19930307586
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English (en)
French (fr)
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EP0589718A1 (de
Inventor
David W. Pinkernell
James O. Beehler
Kevin R. Hudson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HP Inc
Original Assignee
Hewlett Packard Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0589718A1 publication Critical patent/EP0589718A1/de
Application granted granted Critical
Publication of EP0589718B1 publication Critical patent/EP0589718B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2135—Alignment of dots
    • 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
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/34—Bodily-changeable print heads or carriages

Definitions

  • the present invention relates generally to plural pen alignment solutions for ink-jet printers. More particularly, the invention concerns such method that provides a low-cost two pen alignment solution that user-interactively, semi-automatically compensates for misalignments between field replaceable monochrome, e.g. black and tri-color, e.g. magenta, cyan and yellow, pens within an ink-jet printhead carriage.
  • field replaceable monochrome e.g. black and tri-color, e.g. magenta, cyan and yellow
  • the invented plural pen alignment solution involves user interaction with automatic pen alignment firmware to select the best alignment among a number of illustratively printed options.
  • the alignment algorithm is invoked by a keystroke on the ink-jet printer's control panel, typically when a new pen is installed in the printer's carriage.
  • the printer prints stored horizontal and vertical alignment test patterns that illustrate a range of alignment options including one each that should be optimal.
  • the printer also prints a stored illustration of the printer's control panel keys that may be struck to make selected alignments. The user simply examines the printout, selects desired alignments and strikes the indicated key on the panel.
  • Horizontal alignments are made in firmware by shifting the timing between nozzle firings in 300 dots per inch (300 dpi) increments.
  • Vertical alignments are made in firmware by shifting the pixel image, i.e. selecting different nozzles for firing, also at 300 dpi resolution.
  • the printer prints a page of alignment patterns illustrating the chosen alignments, which are stored in non-volatile memory.
  • Fig. 1 illustrates a horizontal alignment test pattern that is printed in accordance with the preferred plural pen alignment solution.
  • Fig. 2 illustrates a pictorial representation of a keypad that is printed in accordance with the invented solution.
  • Fig. 3 illustrates a vertical alignment test pattern that is printed in accordance with the preferred solution.
  • Fig. 4 illustrates a confirmation alignment pattern that is printed in accordance with the preferred solution.
  • Fig. 5 shows the physical layouts of a monochrome and a tricolor ink-jet pen's orifices.
  • Fig. 1 shows plural instances of superposed first and second horizontal alignment patterns that are printed by a controller within an ink-jet printer as part of the invented plural-pen alignment method.
  • the patterns will be understood to represent plural instances of a first stored alignment pattern that are in printed predefined positions on a page utilizing a first pen, e.g. a black pen, which first pattern labeled K includes a collinear set of spaced line segments.
  • first pen e.g. a black pen
  • first pattern labeled K includes a collinear set of spaced line segments.
  • the plural instances themselves are preferably laterally, evenly spaced.
  • Corresponding plural instances of a second stored alignment pattern are printed utilizing a second pen, e.g.
  • magenta pen which second pattern labeled M includes a collinear set of spaced line segments that generally or nominally are in alignment with, i.e. collinear with, and interpose, the spaced line segments of the first pattern.
  • Each of the plural instances of superposed first and second patterns includes and is identified by one or more pattern identifiers, or printed indicia, e.g. the printed numbers 1 through 7 printed adjacent the designated superposed patterns. As will be seen by reference to Fig. 2, such indicia correspond with user selectable keys on a keypad that part of the ink-jet printer's control panel.
  • Fig. 1 illustrates that the plural instances of second alignment pattern M are printed in a range of predefined positions relative to the first pattern instances with a predefined offset, or horizontal shift, of pattern M between successive instances, e.g. the second pattern starts to the left of first pattern K in instance 1 and progressively shifts to the right so that it end to the right of first pattern K in instance 7.
  • the successive shifts may be seen to be transverse, and preferably perpendicular, to axes defined by the collinear segments of second alignment pattern M.
  • the predefined relative positions may be seen nominally to include at least one of the positions of the first pattern, e.g. the superposed patterns labeled 4 in Fig. 1 nominally are aligned.
  • Superposed first and second patterns K, M may be understood to define a number of inter-pen alignment options that are useful to the user in selecting a desired alignment, for example, after installing a new pen into the printer's printhead carriage.
  • the offsets in Fig. 1 are greatly exaggerated to render them more easily discernable and understandable.
  • the horizontal offsets preferably provide a range of approximately ⁇ 3 dots at 300 dpi.
  • the offset of the middle horizontal alignment pattern in Fig. 1 typically would not exhibit the intentionally exaggerated offset, but instead would exhibit perfect or near-perfect alignment between the first and second superposed patterns, thereby achieving the purpose of the invented method and apparatus.
  • a pictorial representation of the printer's control console keypad is shown.
  • Such a pictorial representation preferably is printed with, and most preferably on the same page as are, the plural instances of superposed alignment patterns K, M, when the invented alignment process is invoked.
  • the keypad representation includes selected keys of the keypad identified by, thus visually to promote an association with, printed indicia corresponding with the printed, superposed patterns-adjacent, identifying indicia shown in Fig. 1 to identify the plural superposed alignment pattern instances that represent inter-pen alignment options.
  • the printed key indicia are the numbers 1 through 7 within circles indicating by the arrows the corresponding keys.
  • any printed symbol may be used as a pattern identifier so long as there is an associable selection identifier having a corresponding printed symbol in the pictorial representation.
  • letters may be used instead of numbers, or graphic symbols may be used instead of alphanumeric symbols.
  • the pattern instances may be printed within the corresponding keys of the pictorial representation, as a printed symbol recognizable to the user as indicating which key selection will result in which alignment selection.
  • color code the keys of the pictorial representation, or even the alignment patterns themselves e.g. using various primitive color combinations to print the second alignment patterns
  • first and second alignment patterns 1 through 7 of Fig. 1 and the pictorial representation of the keypad of Fig. 2 are printed on a page of printer paper, preferably along with suitable printed instructions to the user (not shown) to make a selection of the alignment option that is seen to be most desirable, the user inputs a selected key from the keypad by any suitable manual desired alignment selection means, e.g. by depressing the key on the printer's keypad that corresponds with the desired alignment.
  • manual selection means include plural selection identifiers associable with the plural pattern identifiers.
  • the printer's controller reads the keyed input from the user, and correlates the key positional information illustrated in Fig. 2 with the alignment pattern positional information illustrated in Fig. 1.
  • the controller Responsive to the key selection by the user, stores in a preferably non-volatile memory location the chosen alignment criteria, or information regarding the predefined offset corresponding with the user-inputted key. For example, if the user selects key 4, then the controller stores in memory the predefined offset information corresponding with the printed second alignment pattern of instance 4 of Fig. 1. Thereafter, i.e. after the alignment procedure is complete, the printer's controller utilizes this stored predefined offset corresponding with the second pen for all printing that is destined therefor.
  • the result is semi-automatic, user-interactive inter-pen alignment by which the user is able to participate in the selection of the inter-pen alignment or registration. If the tri-color pen is placed in the printer's carriage at a slight lateral offset from the already installed black pen, i.e. either too close to or too far from the black pen, nevertheless near perfect inter-pen alignment can be had when ink-jet printing because the controller, with the user's help, adjusts the timing of its horizontal ink-jet firing sequences as between the black and the tri-color pen so that extremely close alignment or registration in the printed output is maintained. It will be appreciated that horizontal alignment only is illustrated in Figs. 1 and 2, whereas preferably vertical alignment also is provided.
  • Fig. 3 illustrates a variation on the superposed first and second alignment patterns shown in Fig. 1 that facilitates vertical, in addition to horizontal, inter-pen alignment.
  • Fig. 3 which represents a second page of printed output of the inter-pen alignment method
  • plural instances of a first stored alignment pattern are printed utilizing a first pen, e.g. a black pen, with the first pattern again including a set of collinear, spaced line segments.
  • plural instances of a second stored alignment pattern are printed utilizing a second pen, with the second pattern including a set of collinear spaced line segments nominally collinear with and interposing the spaced line segments of the first pattern, and with a predefined offset of the second pattern relative to the first between the successive instances of the first.
  • first patterns labeled K
  • second patterns labeled M
  • each superposed pattern instance is identified by one or more printed indicia such as numbers 1 through 7.
  • the superposed collinear line segments extend along horizontal axes (perpendicular with those printed during the horizontal alignment phase), or parallel with the printhead's scan axis.
  • the superposed patterns represent a predefined range of vertical alignment options.
  • the keyboard representation of Fig. 2 is printed, preferably on the same page as the vertical alignment patterns. The user is instructed as before to choose the desired alignment pattern instance by depressing the correspondingly numbered key on the printer's operator console keypad.
  • information regarding the predefined offset corresponding with the selected pattern instance is stored in preferably non-volatile memory and thereafter utilized for printing by the second pen, e.g. the tri-color pen that printed the magenta segments (labeled M in Fig. 3).
  • the second pen e.g. the tri-color pen that printed the magenta segments (labeled M in Fig. 3).
  • vertical alignment in accordance with the preferred method of the invention is accomplished by pixel or orifice shifting to-be-printed images prior to printing, which will be described by reference to Fig. 5.
  • first and second alignment patterns include both vertical and horizontal line segments, thereby defining respectively an array of horizontal and vertical inter-pen alignment options and providing respectively for a horizontal and a vertical alignment user selection.
  • FIG. 4 shows a page that is printed by the printer's controller after the user has made desired horizontal and vertical alignment selections.
  • a box and a cross are printed in accordance with the preferred method, again with collinear spaced line segments being printed by the first pen and with interposing and now more accurately aligned and collinear spaced line segments printed by the second pen.
  • K for black
  • M for magenta
  • the controller preferably prints an alignment pattern based thereon as confirmation of the user's selection.
  • the alignment pattern does not represent the desired horizontal and vertical alignment, the user may simply repeat the above-described alignment process until a desired alignment, as indicated by the confirmation printout, is achieved.
  • the successive predefined horizontal and vertical offsets illustrated, respectively, in Figs. 1 and 3 define an offset range that has been predetermined to correspond to a range of possible inter-pen alignments within the printhead carriage, as determined by analyzing printer manufacturing tolerances.
  • manufacturing tolerances may be higher, and thus the ink-jet printer cost may be lower, because of the inter-pen alignment method of the invention.
  • the preferred method is user-interactive, semi-automatic, and implemented in firmware executed by the printer's existing controller, its provision imposes negligible cost on the purchaser and user of the printer. It is believed that ink-jet printer users are eager to participate in the inter-pen alignment process, which is infrequently required and which builds user confidence in high print quality.
  • Fig. 5 shows the two-pen ink-jet printer printhead configuration including the nozzle or orifice layout for each pen (with greatly exaggerated inter-orifice spacing, for the sake of clarity).
  • the range over which successive horizontal and vertical second alignment patterns are printed with offsets or positions, as illustrated in Figs. 1 and 3, are defined to a great extent by the geometries of the printhead's pens and the carriage that fixedly locates them relative to one another.
  • the pens necessarily must be only temporarily fixedly captured within the printhead carriage. This need creates the possibility of inter-pen misalignment or mispositioning over a finite, predefined range best described as a lateral separation variance of the nominal separation of the "home" position orifices of the individual pens.
  • the pens as shown are side by side in the printer's carriage, in nominally fixed, absolute and relative positions in the horizontal and vertical axes. Because their fixed positions within the carriage are only nominally determinable, due to the relatively high manufacturing tolerances that make replacement possible, the pens may be described as being positioned relative to one another within a predefined vertical and horizontal range. With this range defined, it is a simple matter to predefine the range of offsets represented by the succession of plural instances of relatively shifted second alignment patterns associated with the tri-color pen the output of which is labeled M in Figs. 1 and 3 so that it is associable with the range of pen alignment or position possibilities.
  • the tri-color pen on the right of Fig. 5 will be understood to represent a "paper's eye” view of the pen. The same is true for the black pen shown on the left of Fig. 5.
  • the two pens' home orifices nominally are separated center to center by approximately 34 millimeters (34 mm).
  • the tricolor pen has three identical but differently positioned sets of bi-line orifices, one for each of the magenta, cyan and yellow ink reservoirs contained therein.
  • the black pen appears from Fig. 5 to have a singular oval set of orifices, but in fact, it too has two columns of operative orifices, generally as described above regarding the tri-color pen (the oval-closing end orifices are non-printing).
  • the printhead carriage containing the pens passes from right to left in Fig. 5, or perpendicularly to the long axes of the columnar, bi-line orifice sets.
  • Offsets are accomplished by simply bit shifting, or pixel shifting, the to-be-printed images by up to ⁇ 3 pixels prior to printing.
  • the alignment patterns are so created, as are normal images printed after a desired, user-selected offset is inputted during vertical alignment.
  • horizontal alignment is accomplished by time shifting, i.e. advancing or retarding, the firing of the ink jets.
  • time shifting straightforwardly is performed by the controller executing firmware resident in a read-only memory (ROM) therein.
  • the invented plural pen alignment solution is generally applicable to pen alignment problems that heretofore have been solved in complicated and expensive ways.

Claims (7)

  1. Ein Anwender-interaktives Ausrichtungsverfahren für einen Tintenstrahldrucker mit einer Mehrzahl von Stiften, mit folgenden Schritten:
    Drucken einer Mehrzahl von Beispielen eines ersten gespeicherten Ausrichtungsmusters unter Verwendung eines ersten Stiftes, wobei das erste Muster einen kollinearen Satz von beabstandeten Liniensegmenten (K) einschließt;
    Drucken einer Mehrzahl von Beispielen eines zweiten gespeicherten Ausrichtungsmusters unter Verwendung eines zweiten Stiftes, wobei das zweite Muster einen kollinearen Satz von beabstandeten Liniensegmenten (M) einschließt, die nominell kollinear mit den beabstandeten Liniensegmenten der ersten Struktur sind und zwischen diesen liegen, mit einer vorbestimmten Verschiebung der zweiten Struktur zwischen aufeinanderfolgenden Beispielen quer zu der Achse, die durch die kollinearen Segmente der zweiten Struktur definiert ist, um eine Mehrzahl von überlagerten Mustern zu schaffen;
    Identifizieren jedes der überlagerten Muster mit einem oder mehreren gedruckten Indizes (1, 2, 3, 4, 5, 6, 7), die einer oder mehreren Anwender-auswählbaren Tasten einer Tastatur des Druckers entsprechen;
    Eingeben einer Tastenauswahl des Anwenders von der Tastatur aus;
    Speichern von Informationen bezüglich der vorbestimmten Verschiebung, die dem zweiten Muster entsprechen, das durch die Anwender eingegebene Taste identifiziert ist;
    und danach
    Verwenden der vorbestimmten Verschiebung, die dem zweiten Stift entspricht, um damit zu drucken.
  2. Das Verfahren nach Anspruch 1, das ferner nach dem Speichern und vor dem Verwenden das Drucken eines Ausrichtungsmusters auf der Grundlage der gespeicherten Informationen als Bestätigung der Auswahl des Anwenders umfaßt.
  3. Das Verfahren nach Anspruch 1, bei dem die vorbestimmten ersten und zweiten Ausrichtungsmuster sowohl horizontale als auch vertikale Liniensegmente einschließen.
  4. Das Verfahren nach Anspruch 1, bei dem die aufeinanderfolgenden vorbestimmten Verschiebungen einen Verschiebungsbereich definieren, der vorbestimmt ist, um einem Bereich von möglichen Zwischenstiftausrichtungen innerhalb des Wagens zu entsprechen.
  5. Das Verfahren nach Anspruch 1, bei dem die Identifizierung durch Drucken der Indizes (1, 2, 3, 4, 5, 6, 7) benachbart zu der Mehrzahl von überlagerten Mustern durchgeführt wird, die den Indizes zugeordnet sind, die den Tasten der Tastatur zugeordnet sind.
  6. Das Verfahren nach Anspruch 5, bei dem das Identifizieren durch Drucken einer bildlichen Darstellung der Tastatur durchgeführt wird, wobei eine oder mehrere Tasten der bildlichen Tastaturdarstellung gedruckte Indizes enthalten, die den gedruckten Identifikationsindizes (1, 2, 3, 4, 5, 6, 7) entsprechen.
  7. Das Verfahren nach Anspruch 1, bei dem das Speichern in einem permanenten Speicher erfolgt, dessen Inhalt beibehalten wird, wenn der Drucker ausgeschaltet ist.
EP19930307586 1992-09-25 1993-09-24 Verfahren zum Ausrichten von Schreibstiften Expired - Lifetime EP0589718B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US95106792A 1992-09-25 1992-09-25
US951067 1992-09-25

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EP0589718A1 EP0589718A1 (de) 1994-03-30
EP0589718B1 true EP0589718B1 (de) 1997-01-08

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JP (1) JPH06226964A (de)
DE (1) DE69307237T2 (de)

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JP3174226B2 (ja) * 1994-10-28 2001-06-11 キヤノン株式会社 記録ヘッド補正方法及びその装置及びその装置によって補正された記録ヘッド及びその記録ヘッドを用いた記録装置
US5923344A (en) * 1997-02-06 1999-07-13 Hewlett-Packard Co. Fractional dot column correction for scan axis alignment during printing
US6164749A (en) * 1997-03-17 2000-12-26 Hewlett-Packard Company Method for user alignment of a color printer
JP3560305B2 (ja) * 1997-03-28 2004-09-02 キヤノン株式会社 記録装置およびチェックパターン記録方法
DE69832120T2 (de) * 1997-04-24 2006-07-27 Seiko Epson Corp. Verfahren und Vorrichtung zur Druckjustierung
US6310637B1 (en) * 1997-07-31 2001-10-30 Seiko Epson Corporation Method of printing test pattern and printing apparatus for the same
US6109722A (en) * 1997-11-17 2000-08-29 Hewlett-Packard Company Ink jet printing system with pen alignment and method
US6000774A (en) * 1998-03-24 1999-12-14 Pitney Bowes Inc. Mailing machine including ink jet operation checking for prevention of loss of postal funds
US6454390B1 (en) * 1998-04-03 2002-09-24 Canon Kabushiki Kaisha Adjustment method of dot printing positions and a printing apparatus
JP4040161B2 (ja) 1998-04-03 2008-01-30 キヤノン株式会社 プリント位置合わせ方法およびプリント装置
JP4377974B2 (ja) * 1998-04-03 2009-12-02 キヤノン株式会社 光学センサのキャリブレーションを含むプリント位置合わせ方法、プリント装置およびプリントシステム
US6076915A (en) * 1998-08-03 2000-06-20 Hewlett-Packard Company Inkjet printhead calibration
JP3688913B2 (ja) 1998-11-19 2005-08-31 シャープ株式会社 シリアルプリンタの記録ずれ調整方法
FR2801836B1 (fr) 1999-12-03 2002-02-01 Imaje Sa Imprimante a fabrication simplifiee et procede de realisation
FR2801835B1 (fr) * 1999-12-03 2002-02-01 Imaje Sa Procede et imprimante avec controle d'avance substrat
US6450607B1 (en) * 2000-09-15 2002-09-17 Lexmark International, Inc. Alignment method for color ink jet printer
GB2379413A (en) 2001-09-10 2003-03-12 Seiko Epson Corp Printhead alignment method
JP3738758B2 (ja) 2002-09-30 2006-01-25 ブラザー工業株式会社 画像形成装置
KR100552460B1 (ko) * 2003-12-03 2006-02-20 삼성전자주식회사 화상형성기기의 노즐위치 제어방법
US7522306B2 (en) * 2004-02-11 2009-04-21 Hewlett-Packard Development Company, L.P. Method and apparatus for generating a calibration target on a medium
US7936365B2 (en) 2004-07-19 2011-05-03 Samsung Electronics Co., Ltd. Printing method and apparatus using shuttle thermal print head
JP6291777B2 (ja) * 2012-12-05 2018-03-14 株式会社リコー 画像形成装置、テストパターンの形成方法、プログラム
US9555620B2 (en) 2013-10-07 2017-01-31 Canon Kabushiki Kaisha Printing apparatus and method for adjusting printing position

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US5049898A (en) * 1989-03-20 1991-09-17 Hewlett-Packard Company Printhead having memory element

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DE69307237T2 (de) 1997-04-24
EP0589718A1 (de) 1994-03-30
DE69307237D1 (de) 1997-02-20
JPH06226964A (ja) 1994-08-16

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