CN101522428B - Printhead ic with open actuator test - Google Patents

Printhead ic with open actuator test Download PDF

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Publication number
CN101522428B
CN101522428B CN2006800560609A CN200680056060A CN101522428B CN 101522428 B CN101522428 B CN 101522428B CN 2006800560609 A CN2006800560609 A CN 2006800560609A CN 200680056060 A CN200680056060 A CN 200680056060A CN 101522428 B CN101522428 B CN 101522428B
Authority
CN
China
Prior art keywords
nozzle
printhead
drive circuit
pulse
selectively
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 - Fee Related
Application number
CN2006800560609A
Other languages
Chinese (zh)
Other versions
CN101522428A (en
Inventor
J·R·希翰
M·J·普尔弗
B·C·莫拉翰
A·莫伊尼
T·P·吉勒斯皮
M·J·韦伯
M·L·甘农
B·R·布朗
R·T·普伦基特
A·J·诺斯
K·西尔弗布鲁克
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.)
Memjet Technology Ltd
Original Assignee
Silverbrook Research Pty Ltd
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 Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Publication of CN101522428A publication Critical patent/CN101522428A/en
Application granted granted Critical
Publication of CN101522428B publication Critical patent/CN101522428B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/345—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads characterised by the arrangement of resistors or conductors
    • 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
    • B41J2/155—Arrangement thereof for line printing
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/0454—Control methods or devices therefor, e.g. driver circuits, control circuits involving calculation of temperature
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04541—Specific driving circuit
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04565—Control methods or devices therefor, e.g. driver circuits, control circuits detecting heater resistance
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04596—Non-ejecting pulses
    • 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
    • B41J2/2142—Detection of malfunctioning nozzles
    • 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
    • B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/3553—Heater resistance determination
    • 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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/365—Print density control by compensation for variation in temperature

Abstract

A printhead IC comprising:an array of nozzles;an ejection actuator corresponding to each of the nozzles respectively, the ejection actuator having a resistive heater that is activated when the actuator ejects ink through the corresponding nozzle;drive circuitry for receiving print data and activating the actuators with drive signals in accordance with the print data; and,open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective.

Description

Printhead ic with open actuator test
Technical field
The present invention relates to the field of ink-jet printer.Specifically, the present invention relates to have the ink-jet printer of printhead, described printhead has the printhead ic (IC) of a plurality of separation, and described integrated circuit limits the nozzle that sprays China ink or other printing fluid.
The cross reference of related application
The whole bag of tricks related to the present invention, system and equipment have been described in following United States Patent (USP)/patent application by applicant of the present invention or assignee's application:
09/575197 7079712 09/575123 6825945 09/575165 6813039 6987506
7038797 6980318 6816274 7102772 09/575186 6681045 6728000
09/575145 7088459 09/575181 7068382 7062651 6789194 6789191
6644642 6502614 6622999 6669385 6549935 6987573 6727996
6591884 6439706 6760119 09/575198 6290349 6428155 6785016
6870966 6822639 6737591 7055739 09/575129 6830196 6832717
6957768 09/575162 09/575172 09/575170 7106888 09/575161 09/517539
6566858 6331946 6246970 6442525 09/517384 09/505951 6374354
09/517608 6816968 6757832 6334190 6745331 09/517541 10/203559
10/203560 7093139 10/636263 10/636283 10/866608 10/902889 10/902833
10/940653 10/942858 10/727181 10/727162 10/727163 10/727245 10/727204
10/727233 10/727280 10/727157 10/727178 7096137 10/727257 10/727238
10/727251 10/727159 10/727180 10/727179 10/727192 10/727274 10/727164
10/727161 10/727198 10/727158 10/754536 10/754938 10/727227 10/727160
10/934720 11/212702 11/272491 11/474278 11/488853 11/488841 10/296522
6795215 7070098 09/575109 6805419 6859289 6977751 6398332
6394573 6622923 6747760 6921144 10/884881 7092112 10/949294
11/039866 11/123011 6986560 7008033 11/148237 11/248435 11/248426
11/478599 11/499749 10/922846 10/922845 10/854521 10/854522 10/854488
10/854487 10/854503 10/854504 10/854509 10/854510 7093989 10/854497
10/854495 10/854498 10/854511 10/854512 10/854525 10/854526 10/854516
10/854508 10/854507 10/854515 10/854506 10/854505 10/854493 10/854494
10/854489 10/854490 10/854492 10/854491 10/854528 10/854523 10/854527
10/854524 10/854520 10/854514 10/854519 10/854513 10/854499 10/854501
10/854500 10/854502 10/854518 10/854517 10/934628 11/212823 11/499803
10/728804 10/728952 7108355 6991322 10/728790 10/728884 10/728970
10/728784 10/728783 7077493 6962402 10/728803 10/728780 10/728779
10/773189 10/773204 10/773198 10/773199 6830318 10/773201 10/773191
10/773183 7108356 10/773196 10/773186 10/773200 10/773185 10/773192
10/773197 10/773203 10/773187 10/773202 10/773188 10/773194 7111926
10/773184 7018021 11/060751 11/060805 11/188017 11/298773 11/298774
11/329157 11/490041 11/501767 11/499736 11/505935 11/506172 11/505846
11/505857 11/505856 MTB54US 6623101 6406129 6505916 6457809
6550895 6457812 10/296434 6428133 10/407212 10/407207 10/683064
10/683041 6750901 6476863 6788336 11/097308 11/097309 11/097335
11/097299 11/097310 11/097213 11/210687 11/097212 11/212637 10/760272
10/760273 7083271 10/760182 7080894 10/760218 7090336 10/760216
10/760233 10/760246 7083257 10/760243 10/760201 10/760185 10/760253
10/760255 10/760209 10/760208 10/760194 10/760238 7077505 10/760235
7077504 10/760189 10/760262 10/760232 10/760231 10/760200 10/760190
10/760191 10/760227 7108353 7104629 11/446227 11/454904 11/472345
11/474273 11/478594 11/474279 11/482939 11/482950 11/499709 10/815625
10/815624 10/815628 10/913375 10/913373 10/913374 10/913372 10/913377
10/913378 10/913380 10/913379 10/913376 10/913381 10/986402 11/172816
11/172815 11/172814 11/482990 11/482986 11/482985 11/454899 11/003786
11/003616 11/003418 11/003334 11/003600 11/003404 11/003419 11/003700
11/003601 11/003618 11/003615 11/003337 11/003698 11/003420 6984017
11/003699 11/071473 11/003463 11/003701 11/003683 11/003614 11/003702
11/003684 11/003619 11/003617 11/293800 11/293802 11/293801 11/293808
11/293809 11/482975 11/482970 11/482968 11/482972 11/482971 11/482969
11/246676 11/246677 11/246678 11/246679 11/246680 11/246681 11/246714
11/246713 11/246689 11/246671 11/246670 11/246669 11/246704 11/246710
11/246688 11/246716 11/246715 11/293832 11/293838 11/293825 11/293841
11/293799 11/293796 11/293797 11/293798 11/293804 11/293840 11/293803
11/293833 11/293834 11/293835 11/293836 11/293837 11/293792 11/293794
11/293839 11/293826 11/293829 11/293830 11/293827 11/293828 11/293795
11/293823 11/293824 11/293831 11/293815 11/293819 11/293818 11/293817
11/293816 10/760254 10/760210 10/760202 10/760197 10/760198 10/760249
10/760263 10/760196 10/760247 10/760223 10/760264 10/760244 7097291
10/760222 10/760248 7083273 10/760192 10/760203 10/760204 10/760205
10/760206 10/760267 10/760270 10/760259 10/760271 10/760275 10/760274
10/760268 10/760184 10/760195 10/760186 10/760261 7083272 11/501771
11/014764 11/014763 11/014748 11/014747 11/014761 11/014760 11/014757
11/014714 11/014713 11/014762 11/014724 11/014723 11/014756 11/014736
11/014759 11/014758 11/014725 11/014739 11/014738 11/014737 11/014726
11/014745 11/014712 11/014715 11/014751 11/014735 11/014734 11/014719
11/014750 11/014749 11/014746 11/014769 11/014729 11/014743 11/014733
11/014754 11/014755 11/014765 11/014766 11/014740 11/014720 11/014753
11/014752 11/014744 11/014741 11/014768 11/014767 11/014718 11/014717
11/014716 11/014732 11/014742 11/097268 11/097185 11/097184 11/293820
11/293813 11/293822 11/293812 11/293821 11/293814 11/293793 11/293842
11/293811 11/293807 11/293806 11/293805 11/293810 11/246707 11/246706
11/246705 11/246708 11/246693 11/246692 11/246696 11/246695 11/246694
11/482958 11/482955 11/482962 11/482963 11/482956 11/482954 11/482974
11/482957 11/482987 11/482959 11/482960 11/482961 11/482964 11/482965
11/482976 11/482973 11/495815 11/495816 11/495817 11/124158 11/124196
11/124199 11/124162 11/124202 11/124197 11/124154 11/124198 11/124153
11/124151 11/124160 11/124192 11/124175 11/124163 11/124149 11/124152
11/124173 11/124155 11/124157 11/124174 11/124194 11/124164 11/124200
11/124195 11/124166 11/124150 11/124172 11/124165 11/124186 11/124185
11/124184 11/124182 11/124201 11/124171 11/124181 11/124161 11/124156
11/124191 11/124159 11/124175 11/124188 11/124170 11/124187 11/124189
11/124190 11/124180 11/124193 11/124183 11/124178 11/124177 11/124148
11/124168 11/124167 11/124179 11/124169 11/187976 11/188011 11/188014
11/482979 11/228540 11/228500 11/228501 11/228530 11/228490 11/228531
11/228504 11/228533 11/228502 11/228507 11/228482 11/228505 11/228497
11/228487 11/228529 11/228484 11/228489 11/228518 11/228536 11/228496
11/228488 11/228506 11/228516 11/228526 11/228539 11/228538 11/228524
11/228523 11/228519 11/228528 11/228527 11/228525 11/228520 11/228498
11/228511 11/228522 111/228515 11/228537 11/228534 11/228491 11/228499
11/228509 11/228492 11/228493 11/228510 11/228508 11/228512 11/228514
11/228494 11/228495 11/228486 11/228481 11/228477 11/228485 11/228483
11/228521 11/228517 11/228532 11/228513 11/228503 11/228480 11/228535
11/228478 11/228479 11/246687 11/246718 11/246685 11/246686 11/246703
11/246691 11/246711 11/246690 11/246712 11/246717 11/246709 11/246700
11/246701 11/246702 11/246668 11/246697 11/246698 11/246699 11/246675
11/246674 11/246667 11/246684 11/246672 11/246673 11/246683 11/246682
11/482953 11/482977 6238115 6386535 6398344 6612240 6752549
6805049 6971313 6899480 6860664 6925935 6966636 7024995
10/636245 6926455 7056038 6869172 7021843 6988845 6964533
6981809 11/060804 11/065146 11/155544 11/203241 11/206805 11/281421
11/281422 11/482981 11/014721 29/219503 11/482978 11/482967 11/482966
11/482988 11/482989 11/482982 11/482983 11/482984 11/495818 11/495819
Application is listed by its reel number.This will be replaced when knowing application number.The disclosure of these applications and patent is merged in this paper by reference at this.
Background technology
Ink-jet printer sprays ink droplet by nozzle array, thereby realizes printing on medium substrate.Nozzle typically uses the semiconductor machine manufacturing technology and is formed on the silicon chip substrate.Each nozzle all is by associated driver circuitry driven MEMS (microelectromechanical systems) device that is formed on the same silicon chip substrate.Be formed on a MEMS spray nozzle device and an associated driver circuitry on the nozzle and be commonly referred to as printhead ic (IC).
Traditional ink-jet printer uses the scanning ink-jet printhead.These printheads have a printhead IC of sweeping away back and forth on the width at this page when the printer index pages.The applicant has has researched and developed multiple pagewidth printhead.The printhead IC that these printheads use a series of end to install to end provides the nozzle array of the whole width that extends to the page.Be fed through out-of-date this printhead at the page and in printer, be maintained fixed, rather than come flyback retrace.Allow much higher print speed like this, but complicated in the operation of the much bigger nozzle array of control.
On wafer substrate, make the MEMS nozzle arrangements and always cause some out of order nozzles.Can after making, use wafer prober to locate these " dead nozzles " immediately.Known the position of dead nozzle, can come print engine controller (PEC) is programmed with dead nozzle map (dead nozzle map).It is used for using the technology (printhead IC has than essential more nozzle, and uses " standby " nozzle to print the point of normally being distributed to dead nozzle) such as nozzle redundancy (nozzleredundancy) to compensate dead nozzle.
Yet, also can be impaired at the length of life nozzle of printhead.One these nozzles are installed to print head assembly and are installed in the printer, just can not use wafer prober to locate them.Along with time lapse, the quantity of dead printhead increases, and because PEC does not recognize them, so there is not their trial of compensation.The final like this visual artifacts that causes impairing print quality.
Summary of the invention
According to first aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array;
Jet actuator (ejection actuator) corresponds respectively to each nozzle, and described jet actuator has the resistance heater that is activated when actuator sprays China ink by respective nozzles;
Drive circuit is used to receive print data and drives signal according to this print data utilization and activates actuator; And
The open actuator test circuit is used for the resistance of resistance heater being compared with predetermined threshold with assessment actuator out of order while whether, optionally forbids (disable) described actuator when driving signal when actuator receives.
In hot ink-jet print head and hot hybrid ink jet printhead, most faults all are that resistance heater scaling loss and damage or " becoming open-circuit " cause.Owing to block, nozzle may not ink-jet, but this is not " a dead nozzle ", and can pass through printer maintenance mechanism (maintenance regime) and recover normally.By utilizing built-in circuit to determine which nozzle is dead, print engine controller can upgrade its dead nozzle map periodically, thereby prolongs the service life of printhead.
Preferably, the open actuator test circuit produces the defective nozzle feedback during print job.In another preferred form, produce the defective nozzle feedback in the predetermined amount of time of open actuator test circuit after print head operation.In a particularly preferred form, the open actuator test circuit produces the defective nozzle feedback between each page or leaf of print job.Preferably, drive circuit has the actuator FET (field-effect transistor) that is driven signal enabling (enable), thereby resistance heater is opened to driving voltage, and the open actuator test circuit has the NAND logic, wherein drives the input and output as the grid that arrives actuator FET of signal and actuator test signal.Preferably, the open actuator test circuit has sensing FET, the source electrode of this sensing FET is connected to the high-voltage side of resistance heater, its drain electrode is connected to sensing electrode, sensing FET is started by test signal, thereby the low-voltage output to sensing electrode is feedback to effective actuator, and is feedback to out of order actuator to the high voltage output of sensing electrode.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, the open actuator test circuit produces the feedback of defective nozzle during print job.
Selectively, produce the feedback that defective nozzle is arranged in the predetermined amount of time of open actuator test circuit after print head operation.
Selectively, the open actuator test circuit produces the feedback that defective nozzle is arranged between each page of print job.
Selectively, drive circuit has the driving FET of the electric current that controls to resistance heater and be used for starting the logic that drives FET and forbid driving FET when receiving driving signal and open actuator test signal when receiving the driving signal.
Selectively, drive circuit has (bleed) FET that releases, and when drive circuit did not receive driving signal or open actuator test signal, it leaks any voltage drop on the resistance heater lentamente was zero.
Selectively, drive circuit has sensing node between drain electrode that drives FET and resistance heater, and the open actuator test circuit has sensing FET, described sensing FET is activated when receiving the open actuator test signal, thereby the voltage of the drain electrode of sensing FET is used to the instruction heater element whether fault is arranged.
Selectively, driving FET is p type FET.
Selectively, drive circuit receives the print data of the array in a plurality of order parts, has fire command (fire command) at each sequence end partly.
In one aspect of the method, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors of the temperature that is used for the printhead IC in each zone of difference sensing.
Selectively, drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
Selectively, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Selectively, driving pulse comprises having is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Selectively, during use, drive circuit is exported in response to temperature sensor and is adjusted the driving pulse profile.
Selectively, during use, deexcitation temperature sensor after a period of time can used.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit activates this row's nozzle according to the shooting sequence, described shooting sequence starts nozzle in each group so that jet printing liquid side by side, and start each and organize jet printing liquid in succession, thereby the nozzle in each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
According to second aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array;
Drive circuit is used for receiving print data and fire command from print engine controller; Wherein during use,
Drive circuit receives the print data of the array in a plurality of sequence parts, all has fire command at each sequence end partly.
Instead of each nozzle in the array shift register is set, printhead IC only has point data shift register enough for the part of nozzle array, and this part of this nozzle array is shot when shift register is written into the point data of the next part that is used for array.Like this shift register is shifted out from unit cell (the minimum recurring unit of black chamber, actuator and the drive circuit of nozzle and correspondence), it is bigger to allow to drive FET when not influencing spray nozzle density.As mentioned above, bigger driving FET can the higher driving pulse of produce power rank, so that more effectively spray ink droplet.
Preferably, array is configured to row and column, and sequence partly is the nozzle among each independent row, thereby described row once sprays a row printing fluid.In another preferred form, drive circuit is configured to according to predetermined sequence shooting row, and print engine controller is sent to drive circuit according to predetermined sequence with each row's print data.In particularly preferred form, in shooting during last row, be written into according to next row's of predetermined sequence print data.Preferably, the printing fluid of the nozzle ejection same type among each row.
Selectively, array is configured to row and column, and sequence partly is the nozzle among each independent row, thereby described row once sprays a row printing fluid.
Selectively, drive circuit is configured to predetermined sequence shooting row, and print engine controller is sent to drive circuit with the print data that predetermined sequence will be used for each row.
Selectively, in shooting during last row, be written into according to next row's of predetermined sequence print data.
Selectively, the nozzle among each row all sprays the printing fluid of same type.
In another aspect, provide a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, the open actuator test circuit produces the feedback of defective nozzle during print job.
In another aspect, provide a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors of the temperature that is used for the printhead IC in each zone of difference sensing.
Selectively, drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
Selectively, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Selectively, driving pulse comprises having is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Selectively, during use, drive circuit is exported in response to temperature sensor and is adjusted the driving pulse profile.
Selectively, during use, deexcitation temperature sensor after a period of time can used.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit activates this row's nozzle according to the shooting sequence, described shooting sequence starts the nozzle of each group so that while jet printing liquid, and start each and organize jet printing liquid in succession, thereby the nozzle of each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit is in response to receiving electric power and will itself be reset to known original state from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the third aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array has a plurality of adjacent areas; And
Drive circuit is used for electric pulse is sent to each nozzle individually, so that these nozzle ejection printing fluids drip; And
A plurality of temperature sensors are used for the temperature of the printhead IC in each zone of sensing respectively.
Utilize some sensors to monitor temperature on the whole printhead IC, the Temperature Distribution of the China ink in the zones of different is provided for drive circuit.Use can be adjusted into the driving pulse that is sent to the nozzle in each zone the most current viscosity of suitable China ink from the feedback of sensor.By compensating any black differences in viscosity, the droplet ejection characteristics on the whole printhead IC keeps evenly, thereby the droplet ejection characteristics on the full page width printhead keeps evenly.As mentioned above, ink droplet jet has improved print quality uniformly.
Preferably, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.In another preferred form, all different for the duration of the pulse profile of each temperature band.In particularly preferred form, if temperature sensor indicates this zone to operate under the temperature that is higher than the highest temperature threshold, then associated driver circuitry will be set at zero the pulse duration.In certain embodiments, array is set to the row and column of nozzle, and each zone all is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.In the concrete form of this embodiment, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.In some modification of this embodiment, associated driver circuitry is set at duration of pulse profile the inferior injection value of any nozzle of the row who is used for not spraying ink droplet during this shooting sequence.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, all different for the duration of the pulse profile of each temperature band.
Selectively, if temperature sensor indicates this zone to operate under the temperature that is higher than the highest temperature threshold, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone all is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts nozzle among this row with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, the open actuator test circuit produces the feedback of defective nozzle during print job.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing will be given printhead IC up to print engine controller with unique mutually address assignment.
Selectively, drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
Selectively, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Selectively, driving pulse comprises having is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Selectively, during use, drive circuit is adjusted the driving pulse profile in response to the temperature sensor output valve.
Selectively, during use, deexcitation temperature sensor after a period of time can used.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit encourages nozzle among this row according to the shooting sequence, described shooting sequence starts the nozzle of each group so that jet printing liquid side by side, and start each and organize jet printing liquid in succession, thereby the nozzle in each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to fourth aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array; And
Drive circuit be used for driving pulse is sent to individually each of nozzle, thereby these nozzle ejection printing fluids drips; Wherein
Drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
The temperature of monitoring each printhead IC allows any black differences in viscosity between the different printhead IC of drive circuit compensation pagewidth printhead.By compensating any black differences in viscosity, the droplet ejection characteristics on the whole printhead keeps evenly, so that improve print quality.
Preferably, printhead IC also comprises a plurality of temperature sensors, each temperature sensor is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.Preferably, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.In another preferred form, all different for the duration of the pulse profile of each temperature band.In particularly preferred form, if operate under the temperature that is higher than the highest temperature threshold the temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.In certain embodiments, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.In the concrete form of this embodiment, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.In some modification of this embodiment, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors, each temperature sensor is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, all different for the duration of the pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the highest temperature threshold the temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has this difference address is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Selectively, driving pulse comprises having is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Selectively, during use, drive circuit is adjusted the driving pulse profile in response to the temperature sensor output valve.
Selectively, during use, deexcitation temperature sensor after a period of time can used.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit encourages nozzle among (actuat) this row according to the shooting sequence, described shooting sequence starts nozzle in each group so that jet printing liquid side by side, and start each and organize jet printing liquid in succession, thereby the nozzle in each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 5th aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array; And
Drive circuit is used for driving pulse is sent to individually each of nozzle, so that these nozzle ejection printing fluids drip; And
Temperature sensor is used for the temperature of the printing fluid in the sensing array; Wherein
When the sensor indicated temperature had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Abandon print job effectively at maximum temperature deactivating heater, but prevented the nozzle scaling loss.When problem was remedied, overtemperature protection system allowed nozzle to recover normal.
Preferably, during near predetermined maximum, drive circuit reduces the duration of driving pulse in the temperature of printing fluid, thereby the direction under predetermined maximum is zero.
The temperature of monitoring each printhead IC allows any black differences in viscosity between the different printhead IC of drive circuit compensation pagewidth printhead.By compensating any black differences in viscosity, the droplet ejection characteristics on the whole printhead keeps evenly, so that improve print quality.
Preferably, printhead IC also comprises a plurality of temperature sensors, each temperature sensor is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.Preferably, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.In certain embodiments, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.In the concrete form of this embodiment, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.In some modification of this embodiment, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, during near predetermined maximum, drive circuit reduces the duration of driving pulse in the temperature of printing fluid, thereby the direction under predetermined maximum is zero.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors, each temperature sensor is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the indication of first broadcasting instructions has the printhead IC of different addresses, thereby with its address modification is first unique address, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for assessing actuator out of order while whether in that the resistance of resistance heater is compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, driving pulse comprises having is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Selectively, during use, drive circuit is adjusted the driving pulse profile in response to the temperature sensor output valve.
Selectively, during use, deexcitation temperature sensor after a period of time can used.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit encourages nozzle among this row according to the shooting sequence, described shooting sequence starts nozzle in each group so that jet printing liquid side by side, and start each and organize jet printing liquid in succession, thereby the nozzle in each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 6th aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array; And
Drive circuit is used to receive print data and according to print data driving pulse is sent to nozzle; Wherein
Driving pulse comprises having and is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
Drive circuit is sent to each nozzle in the array with driving pulse, and no matter whether print data was assigned therein as the shooting nozzle at that time.Send to non-shooting nozzle and to be not enough to spray ink droplet but to have kept inferior injection pulse of temperature of the China ink at nozzle place, thereby when its shooting next time, its black temperature and viscosity are similar with viscosity to the Mo Wendu of the nozzle of shooting more continually.
Preferably, inferior injection pulse has the voltage and current identical with injection pulse, but the duration is shorter.In another preferred form, printhead IC also comprises temperature sensor, and this temperature sensor has the output of the temperature of at least a portion of indicating array, wherein, if the temperature sensor indicated temperature is more than predetermined maximum, then drive circuit is set at zero with the duration of driving pulse.
Preferably, printhead IC also comprises a plurality of temperature sensors, each temperature sensor is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.Preferably, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band all has different pulse profiles for the electric pulse that is sent to the nozzle in the current zone of operating in this temperature band.
The temperature of monitoring each printhead IC allows any black differences in viscosity between the different printhead IC of drive circuit compensation pagewidth printhead.By compensating any black differences in viscosity, the droplet ejection characteristics on the whole printhead keeps evenly, thereby improves print quality.
In certain embodiments, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.In the concrete form of this embodiment, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, inferior injection pulse has the voltage and current identical with injection pulse, but the duration is shorter.
In another aspect, the invention provides a kind of printhead IC that also comprises temperature sensor, described temperature sensor has the output of the temperature of at least a portion of indicating array, wherein, if the temperature sensor indicated temperature is more than predetermined maximum, then drive circuit is set at zero with the duration of driving pulse.
In another aspect, the invention provides a kind of printhead IC that also comprises a plurality of temperature sensors, each temperature sensor all is used for the temperature of the regional interior nozzle of this array of sensing, thereby in response to the temperature difference between the zone, the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band all has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
In another aspect, the invention provides a kind of printhead IC, thereby this printhead IC also comprises the drive circuit that the nozzle among this row of startup is shot with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for assessing actuator out of order while whether in that the resistance of resistance heater is compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
Selectively, during use, drive circuit is exported in response to temperature sensor and is adjusted the driving pulse profile.
Selectively, during use, deexcitation temperature sensor after a period of time can be made.
Selectively, drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
Selectively, during use, drive circuit encourages nozzle among this row according to the shooting sequence, described shooting sequence starts nozzle in each group so that jet printing liquid side by side, and start each and organize the sequence-injection printing fluid, thereby the nozzle in each group is by the nozzle each interval of predetermined at least minimum number, and the nozzle in the group of each nozzle in a group and startup subsequently by the nozzle of predetermined at least minimum number at interval.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, the drive circuit response receives electric power and will itself be reset to known original state from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 7th aspect, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array;
Associated driver circuitry is used to receive print data, and according to print data the driving pulse of electric energy is sent to nozzle array; And
The temperature sensor that is connected with drive circuit is used for adjusting the driving pulse profile in response to the output of temperature sensor; Wherein, during use,
Deexcitation temperature sensor after a period of time can used.
Temperature sensor on each printhead IC allows drive circuit to adjust driving pulse, so that compensates.Yet temperature sensor is electric load that adds and the additional electrical components that produces noise in other circuit.In a single day by knowing operating temperature with regard to the deexcitation sensor, the electric power and the noise problem that are caused by sensor are temporary transient.In case printhead IC has reached its operating temperature, its temperature just can not promptly or in large quantities change, and therefore can will keep correct very big this printhead IC of situation deactivating of possibility in any temperature-compensating to the driving pulse profile.
Preferably, temperature sensor activates periodically again, thereby drive circuit can be adjusted the driving pulse profile, if necessary.In another preferred form, printhead IC has along array a plurality of temperature sensors separately, wherein, during use, can the one or more temperature sensors of deexcitation.In certain embodiments, during print job, sequentially each of a plurality of temperature sensors is activated a period of time.Selectively, a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Preferably, each in a plurality of temperature sensors all is configured to the temperature of the corresponding region of this array of sensing, thereby the driving pulse that is used for the nozzle in driving pulse and another zone of nozzle in a zone can be different.In one embodiment, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and the adjacent area of wherein temperature sensor deexcitation carried out identical adjustment.Preferably, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.In another preferred form, the duration of pulse profile that is used for each temperature band is all different.In particularly preferred form, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then associated driver circuitry will be set at zero the pulse duration.In certain embodiments, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.In the concrete form of this embodiment, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.In some modification of this embodiment, associated driver circuitry is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, temperature sensor activates periodically again, thereby drive circuit can be adjusted the driving pulse profile, if necessary.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises along array a plurality of temperature sensors separately, wherein, during use, can the one or more temperature sensors of deexcitation.
Selectively, during print job, sequentially each of a plurality of temperature sensors is activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature of the corresponding region of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to eight aspect, the invention provides a kind of ink-jet printer, this ink-jet printer comprises:
Arrange nozzle array in a row, each row's nozzle all is divided into a plurality of groups, and each group all has at least one nozzle; And
Drive circuit is used for driving pulse is sent to individually each of nozzle, so that these nozzle ejection printing fluids drip; Wherein
Drive circuit postpones driving pulse is sent in these groups one with respect in other group at least one.
By by stage ground shooting nozzle, reduced from the rate of change of the electric current of power supply traction.This has reduced the impedance and the voltage dip of circuit again.All nozzles among shooting one row can with shortest time refill the time by China ink and set.In applicant's printhead IC design, China ink refills and can be about 50 microseconds.The duration that pistol shot pulse dashes is about 300 to 500 nanoseconds.Have in the printhead IC of ten row's nozzles a hypothesis, each row needs about 5 microseconds to shoot all nozzles.It is possible shooting this row with the shorter time, but it means that this comes discharge and will not activate fully for some time between hitting.The present invention utilizes staggered row's of this time nozzle shooting sequence, thereby mild required electric current increases.
Preferably, this row's nozzle is made up of a series of zones, and sets by the nozzle that is positioned at a zone and determine.In another preferred form, each row has it from the total time that all nozzle ejection printing fluids can be used, and be sent out the driving pulse that is used for from the nozzle ejection printing fluid in a zone, with to be sent out the driving pulse that is used for other regional nozzle ejection printing fluid from least one partly overlapping.
Selectively, this array is made up of a series of zones, wherein a plurality of groups of each row in each zone, thereby drive circuit begins driving pulse sequentially is sent to each zone.
Selectively, driving pulse is sent to each zone according to the shooting sequence, thereby have only a nozzle to shoot simultaneously in each group, and the shooting sequence in each zone has the identical duration, thereby this shooting sequence that is used for this zone is partly overlapping with a plurality of shooting sequences in other zone that is used for same row.
In one aspect of the method, the invention provides a kind of ink-jet printer, this ink-jet printer comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit is exported in response to temperature sensor.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature of the corresponding region of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, on printhead IC, make nozzle array and drive circuit, described printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC have shared initial address, has only an exception, this exception has different addresses, so that print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of ink-jet printer, this ink-jet printer also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 9th aspect, the invention provides a kind of ink-jet printer, this ink-jet printer comprises:
Arrange nozzle array in a row, each row comprises a plurality of nozzle sets, and the nozzle in each group all is scattered with the nozzle from other group; And
Associated driver circuitry is used for according to the shooting sequence nozzle that encourages this row, and described shooting sequence starts each nozzle in organizing so that jet printing liquid side by side, and starts each and organize jet printing liquid in succession; Wherein
Nozzle in each group is spaced apart from each other by the nozzle of predetermined at least minimum number, and each nozzle in a group is spaced apart by the nozzle of predetermined at least minimum number with the nozzle in the group that starts subsequently.
The present invention sets each row's nozzle shooting sequence, so that nozzle is shot according to staggered group, can select the nozzle in each group, so that they can be too not near from nozzle of shooting simultaneously or the nozzle that will shoot immediately afterwards.The needed high electric current of the whole row of shooting has simultaneously been avoided in shooting stage by stage to nozzle.The ill-effect that minimum interval between the nozzle that keeps the nozzle of shooting simultaneously and will shoot immediately after them has avoided mutual interference of liquid phase and air force to disturb.
It should be noted that print data can not require each nozzle among the row all to shoot in same shooting sequence.Yet the present invention starts each nozzle makes its shooting sometime in the shooting sequence, and no matter whether it has positively shot ink droplet.Therefore, the interval between the nozzle of She Ji nozzle or order shooting is usually greater than predetermined minimum interval simultaneously, but this can not damage print quality.The present invention relates to guarantee that two intervals between the potential interference ink droplet are never less than predetermined minimum value.
Preferably, this row is divided into span (span), and described span only has a nozzle from every group, so that the quantity of this row's span equals the quantity of the group of nozzle.In another preferred form, sequentially the predetermined minimum number of the nozzle between the nozzle of Qi Donging is to unify the unified displacement of direction along each span, displacement is to be the quantity greater than an integer nozzle of 1, but not the factor of the quantity of nozzle in the span, thereby the nozzle that starts in succession in each span advances to an end of span, up to the nozzle that is left to be not enough to fill displacement at this end, in this case, this displacement is used at the nozzle of the opposite end of span and is finished, thereby during the shooting sequence, once start all nozzles in the span.
In particularly preferred form, displacement is integer the nozzle quantity nearest with the square root of span, rather than factor (be span can not be shifted divide exactly and do not have remainder).The applicant has been found that it provides interval maximum on time and space for the ink droplet that sprays.
Selectively, this row is divided into span, and described span only has a nozzle from every group, so that the quantity of this row's span equals the quantity of the group of nozzle.
Selectively, sequentially the predetermined minimum number of the nozzle between the nozzle of Qi Donging is to unify the unified displacement of direction along each span, displacement is to be the quantity greater than an integer nozzle of 1, but not the factor of the quantity of nozzle in the span, thereby the nozzle that starts in succession in each span advances to an end of span, up to the nozzle that is left to be not enough to fill displacement at this end, in this case, this displacement is used at the nozzle of the opposite end of span and is finished, thereby during the shooting sequence, once start all nozzles in the span.
Selectively, displacement is integer the nozzle quantity nearest with the square root of span, rather than factor.
In another aspect, the invention provides a kind of ink-jet printer, this ink-jet printer also comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit response temperature sensor is exported.
Selectively, during print job, each in a plurality of temperature sensors is all sequentially activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of ink-jet printer, this ink-jet printer is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has this difference address is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of ink-jet printer, this ink-jet printer also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the tenth aspect, the invention provides a kind of printhead IC that is used for ink-jet printer, described ink-jet printer is installed together other identical printhead IC of printhead IC and at least one the pagewidth printhead is provided, so that printing through on the medium substrate of printhead with the direction of feed feeding, described printhead IC comprises:
The elongated array of nozzle, described nozzle arrangement is in a row, the mid portion of second portion that at least one row has the first that is arranged on the row that extends perpendicular to direction of feed, be provided with along the parallel row from first's displacement and the nozzle that extends between first and second portion; And
Feed line is used for printing fluid is provided to first, second portion and mid portion, and described feed line has: perpendicular to first one of the direction of feed extension, be used for the first of supply nozzle; Perpendicular to second one of the direction of feed extension, be used for the second portion of supply nozzle; And the rake that is used for the mid portion of supply nozzle.
Make nozzle row's a part downward-sloping with the join sharp-pointed corner of the feed line of having avoided corresponding of downtrend triangle (drop triangle).
Preferably, the mid portion of nozzle is followed the ladder path (stepped path) from first to this part.In another preferred form, each ladder in ladder path has two nozzles, and two nozzles on each ladder are positioned on the row that extends perpendicular to direction of feed.In particularly preferred form, each row in the array has first and second parts of extending perpendicular to direction of feed and the sloping portion that extends between these two parts.In certain embodiments, on a side of wafer substrate, make nozzle array, and feed line is at the etched a series of raceway grooves of the opposite side of wafer substrate.In specific embodiment, each feed line is the supply of two in the row of nozzle printing fluid all.
Selectively, the mid portion of nozzle is followed the ladder path from first to this part.
Selectively, each ladder in ladder path has two nozzles, and two nozzles on each ladder are positioned on the row that extends perpendicular to direction of feed.
Selectively, on a side of wafer substrate, make nozzle array, and feed line is at the etched a series of raceway grooves of the opposite side of wafer substrate.
Selectively, each feed line two in the row of nozzle supply printing fluid all.
Selectively, nozzle is according to coming jet printing liquid from the print data of print engine controller, and the printing fluid that partly sprays from the centre is little by little postponed by each ladder on the ladder path.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors that are provided with along the array of nozzle, thereby drive circuit is exported in response to temperature sensor and adjusted driving pulse.
Selectively, during print job, each in a plurality of temperature sensors is all sequentially activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has this difference address is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
According to the tenth one side, the invention provides a kind of printhead IC, this printhead IC comprises:
Nozzle array, each nozzle all have corresponding heater, so that form vapour bubble in printing fluid, it is injected by nozzle to make printing fluid drip; And
Drive circuit, be used to produce the driving pulse to heating installation power supply, described drive circuit is configured to two kinds of pattern operations, i.e. printing model and service modes, the driving pulse that this drive circuit produces in printing model is a print pulse, and driving pulse is the deoppilation pulse in service mode; Wherein
The deoppilation pulse has the duration longer than print pulse.
Bubble by long relatively low-yield pulse shaping is bigger bubble.Bigger bubble applies bigger motive force to China ink, thereby can be better to the nozzle deoppilation.Described motive force is the pressure to bubble area and pulse duration integration.During printing model, wish to be combined into (nucleate) bubble fast, enter thermal losses in the China ink so that when heater is heated to overheated temperature, reduce by conduction.By reducing pulse energy, postponed bubble assembly (bubble nucleation).During postponing, heater has increased the heat that is transmitted in the China ink.The heat energy of China ink raises, and when assembling, the energy of storage be released as have big motive force than air pocket.
Selectively, before the deoppilation pulse, apply earlier and do not have enough energy are assembled bubble in printing fluid a series of injection pulses.
Selectively, during print job, drive circuit sends at least some nozzles with the deoppilation pulse.
Selectively, drive circuit sends the deoppilation pulse between the page of print job.
In another aspect, the invention provides a kind of ink-jet printer, this ink-jet printer also comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit response temperature sensor is exported.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
Selectively, on printhead IC, make nozzle array and drive circuit, described printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC have shared initial address, has only an exception, this exception has different addresses, so that print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for assessing actuator out of order while whether in that the resistance of resistance heater is compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit extracts clock signal from the print data transmission from PEC.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 12 aspect, the invention provides a kind of printhead IC that is used for ink-jet printer, described ink-jet printer has the PEC that is used for print data is sent to printhead IC, and described printhead IC comprises:
Nozzle array is used for ink droplet jet with printing fluid to medium substrate; And
Drive circuit is used to drive nozzle array, and described drive circuit is configured to extract clock signal from the print data transmission from PEC.
By incorporating clock signal into print data signal, the quantity of the connection between PEC and the printhead IC has reduced.If the pagewidth printhead is set to removable print cartridge, then this is useful, because the electric interfaces that matches with print cartridge when inserting has less contact, so easier installation.All printhead IC are given write the address and IC is linked to be ring, make PEC have a data entry-line and a data outlet line via their data output end.In this case, electric interfaces only has two contacts.
By the initialization printhead IC in response to energising, the interface of PEC/ printhead IC does not need to be connected to the independent circuit that resets of each IC.In fact, PEC can have few to two be electrically connected.Do not need the use of initialization printhead IC.If send print data via the motor synchronizing data-signal, then " data enter " circuit from PEC to the printhead IC is being connected of only needing with " data output " circuit of getting back to PEC from printhead IC.If the data entering signal is not self synchronous, then need to have clock line through PEC/ printhead IC interface.
Selectively, transfer of data is the data signal that each clock cycle all has rising edge.
Selectively, the position of the trailing edge of drive circuit by the clock cycle is from each clock cycle specified data position.
In another aspect, the invention provides a kind of printhead IC, the printhead IC that this printhead IC is identical with other is linked, so that form the pagewidth printhead, wherein, transfer of data is connected to all printhead IC by multiple spot, and the unique address that writes that is provided by PEC all is provided each printhead IC.
Selectively, the interface between printhead and the PEC only has two connections.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit response temperature sensor is exported.
Selectively, during print job, each in a plurality of temperature sensors is all sequentially activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has this difference address is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, after not receiving a period of time of electric power from power supply, drive circuit will itself be reset to known original state in response to receiving electric power from power supply.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 13 aspect, the invention provides a kind of printhead IC that is used for ink-jet printer, described ink-jet printer has the PEC that is used for print data is sent to printhead IC, and described printhead IC comprises:
Nozzle array is used for ink droplet jet with printing fluid to medium substrate; And
Drive circuit is used to drive nozzle array, and described drive circuit is configured to be connected with power supply in the printer; Wherein,
Described drive circuit is configured to after not receiving a period of time of electric power from power supply, will itself be reset to known original state in response to receiving electric power from power supply.
By the initialization printhead IC in response to energising, the interface of PEC/ printhead IC does not need to be connected to the independent circuit that resets of each IC.In fact, PEC can have few to two be electrically connected.Do not need the use of initialization printhead IC.If send print data via the motor synchronizing data-signal, then " data enter " circuit from PEC to the printhead IC is being connected of only needing with " data go out " circuit of getting back to PEC from printhead IC.If the data entering signal is not self synchronous, then need to have clock line through PEC/ printhead IC interface.
Selectively, drive circuit is configured to extract clock signal from the print data transmission from PEC.
Selectively, transfer of data is the data signal that each clock cycle all has rising edge.
Selectively, the position of the trailing edge of drive circuit by the clock cycle is from each clock cycle specified data position.
In another aspect, the invention provides a kind of printhead IC, the printhead IC that this printhead IC is identical with other is linked, so that form the printhead of pagewidth, wherein, transfer of data is connected to all printhead IC by multiple spot, and the unique address that writes that is provided by PEC all is provided each printhead IC.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit response temperature sensor is exported.
Selectively, during print job, each in a plurality of temperature sensors is all sequentially activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Selectively, if operate under the temperature that is higher than the maximum temperature threshold value temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC is installed to the pagewidth printhead with a plurality of identical printhead IC, wherein all printhead IC all have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has this difference address is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with this difference address is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for the resistance of resistance heater being compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives with assessment actuator out of order while whether.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
Selectively, the interface between printhead and the PEC only has two connections.
Selectively, drive circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
According to the 14 aspect, the invention provides a kind of printhead IC that is used for ink-jet printer, described ink-jet printer has and is used for according to the tentation data host-host protocol print data being sent to the PEC of printhead IC, and described printhead IC comprises:
Nozzle array is used for ink droplet jet with printing fluid to medium substrate; And
Drive circuit is used to drive nozzle array; Wherein,
Described circuit is configured to receive print data according in a plurality of different Data Transport Protocols any one.
Make printhead IC and different Data Transport Protocol compatibilities increase the versatility of printhead IC design.General design has reduced needs the type of the chip of manufacturing, thereby has reduced production cost.
Selectively, one in the Data Transport Protocol is the motor synchronizing data-signal, and in the Data Transport Protocol another has the clock and the data-signal of separation.
Selectively, be connected with power supply in the printer, drive circuit is consistent with the Data Transport Protocol that PEC is using up to it by different operator scheme circulations.
Selectively, drive circuit is configured to extract clock signal from the print data transmission from PEC.
Selectively, transfer of data is the data signal that each clock cycle all has rising edge.
Selectively, the position of the trailing edge of drive circuit by the clock cycle is from each clock cycle specified data position.
In another aspect, the invention provides a kind of printhead IC, the printhead IC that this printhead IC is identical with other is linked, so that form the pagewidth printhead, wherein, transfer of data is connected to all printhead IC by multiple spot, and the unique address that writes that is provided by PEC all is provided each printhead IC.
Selectively, the interface between printhead and the PEC only has two connections.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises the open actuator test circuit, be used for assessing actuator out of order while whether in that the resistance of resistance heater is compared with predetermined threshold, optionally forbid described actuator when driving signal when actuator receives.
Selectively, during use, be used to adjust the print data that receives by drive circuit subsequently from the feedback of open actuator test circuit.
Selectively, the open actuator test circuit produces the defective nozzle feedback during print job.
Selectively, the open actuator test circuit produces the defective nozzle feedback in the scheduled time after print head operation.
Selectively, drive circuit has the driving FET of the electric current that controls to resistance heater and be used for starting the logic that drives FET and forbid driving FET when receiving driving signal and open actuator test signal when receiving the driving signal.
Selectively, drive circuit has the FET of releasing, and when drive circuit did not receive driving signal or open actuator test signal, it leaks any voltage drop on the resistance heater lentamente was zero.
Selectively, drive circuit has sensing node between drain electrode that drives FET and resistance heater, and the open actuator test circuit has sensing FET, it is activated when receiving the open actuator test signal, thereby uses the voltage of the drain electrode of sensing FET to come the instruction heater element whether fault is arranged.
Selectively, driving FET is p type FET.
Selectively, drive circuit receives the print data of the array in a plurality of order parts, all has fire command at each sequence end partly.
In one aspect of the method, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors that are provided with along nozzle array, thereby drive circuit is exported in response to temperature sensor and adjusted driving pulse.
Selectively, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
Selectively, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, thereby the deoppilation pulse has the duration longer than print pulse.
According to the 15 aspect, the invention provides a kind of ink-jet printer, this ink-jet printer comprises:
Pagewidth printhead with a plurality of printhead IC, each printhead IC all have be used for the ink droplet jet of printing fluid to the medium substrate nozzle array and the associated driver circuitry that is used to drive nozzle array;
Print engine controller is used for print data is sent to printhead IC;
Interface is used for the electrical communication between print engine controller and printhead IC; Wherein,
All printhead IC have shared initial address, has only an exception, this exception has different addresses, thereby print engine controller is sent to any printhead IC with this difference address with first instruction, the printhead IC that the indication of first broadcasting instructions has different addresses is first unique address with its address modification, printhead IC is connected to each other, thereby in case this exception is first unique address with its address modification, just making one in the printhead IC with shared address is this difference address with its address modification, thereby when print engine controller is sent to this difference address with second broadcasting instructions, printhead IC with different addresses is second unique address with its address modification, and make one in the remaining printhead IC with shared address to change into different addresses, reprocessing is given printhead IC up to print engine controller with unique mutually address assignment.
Use this processing, between print engine controller and all printhead IC, only need two to be electrically connected." data enter " circuit from PEC to the printhead IC and get back to " data output " circuit of PEC from printhead IC.
According to second aspect, the invention provides a kind of head cartridge that is used for ink-jet printer, described ink-jet printer has the PEC that is used for print data is sent to head cartridge, and described head cartridge comprises:
A plurality of printhead IC, each printhead IC all have and are used for the ink droplet jet of the printing fluid nozzle array to the medium substrate, and described printhead IC has shared initial address, has only an exception, and this exception has different addresses;
Write address circuit, be used for this exception is set at different addresses, and the connection between the printhead IC is provided, so that when its adjacent printhead IC made PEC change it to write the address, each printhead IC all made its address become this difference address from initial address; And
Electric interfaces, two that are used to set up with PEC are electrically connected.
Selectively, use unique address that writes to be connected to printhead IC from the print data signal multiple spot of PEC.
Selectively, print data signal is self synchronous.
Selectively, drive circuit is configured to extract clock signal from the print data transmission from PEC.
Selectively, transfer of data is the data signal that each clock cycle all has rising edge.
Selectively, the position of the trailing edge of drive circuit by the clock cycle is from each clock cycle specified data position.
Selectively, the interface between printhead and the PEC only has two connections.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to the nozzle in the current zone of operating in this temperature band.
Selectively, all different for the duration of the pulse profile of each temperature band.
Selectively, if operate under the temperature of the high threshold that is higher than temperature threshold the temperature sensor indicating area, then drive circuit will be set at zero the pulse duration.
Selectively, array is set to the row and column of nozzle, and each zone is a plurality of adjacent row, thereby drive circuit is configured to a round one row's nozzle.
Selectively, drive circuit starts the nozzle among this row, thereby shoots with the prearranged fire sequence.
Selectively, drive circuit is set at duration of pulse profile the inferior injection value of any nozzle among the row who does not spray ink droplet during this shooting sequence.
In another aspect, the invention provides a kind of printhead IC, this printhead IC also comprises a plurality of temperature sensors that are provided with along nozzle array, adjusts driving pulse so that drive circuit response temperature sensor is exported.
Selectively, during print job, each in a plurality of temperature sensors is all sequentially activated a period of time.
Selectively, these a plurality of temperature sensors are divided into two or more groups, print job the duration according to predetermined repetitive sequence with each one sensing period of group activation.
Selectively, each in a plurality of temperature sensors all is configured to the temperature in the zone of correspondence of this array of sensing, thereby the driving pulse of nozzle that is used for a zone is different with the driving pulse of the nozzle that is used for another zone.
Selectively, per two temperature sensors in a plurality of temperature sensors of deexcitation, so that the drive circuit adjustment is corresponding to the driving pulse profile in the zone of the temperature sensor of each activation, and temperature sensor wherein carried out identical adjustment by the adjacent area of deexcitation.
Selectively, with a series of temperature threshold drive circuit is programmed, described temperature threshold limits one group of temperature band, and each temperature band has different pulse profiles for the driving pulse that is sent to current nozzle in the zone that this temperature ribbon gymnastics is done.
Selectively, it is all different to be used for duration of pulse profile of each temperature band.
Description of drawings
By example specific embodiments of the invention are described now with reference to accompanying drawing, wherein:
Fig. 1 is the schematic diagram of the printhead IC structure of link;
Fig. 2 is the schematic diagram of unit cell;
Fig. 3 shows the configuration of the nozzle array on the printhead IC;
Fig. 4 is the schematic diagram of the row of the nozzle in the array and row's setting;
Fig. 5 A is the schematic diagram of the nozzle array of non-distortion;
Fig. 5 B is used for and the schematically showing of the distortion of the continuous array of adjacent printhead IC;
Fig. 5 C is the enlarged drawing of the sloping portion of array, is China ink supply raceway groove above wherein;
Fig. 6 A shows the configuration of the printhead IC of the link with downtrend triangle (drop triangle) of the prior art;
Fig. 6 B shows the China ink supply raceway groove corresponding to the nozzle array shown in Fig. 6 A;
Fig. 7 is the schematic diagram to the printhead connection of SoPEC;
Fig. 8 is the schematic diagram to the printhead connection of MoPEC;
Fig. 9 shows for ' 1 ' motor synchronizing data-signal with ' 0 ';
Figure 10 shows the sketch in eight TCPG zones on the UdonIC;
Figure 11 is the sketch according to two nozzle rows of the sequence shooting that is limited by different spans and displacement;
Figure 12 is the schematic diagram of shooting sequence of nozzle row's segmentation, and its central span is five, and displacement is three;
Figure 13 A is at the traction current of a row in the time and row's the traction current altogether during the zone fire sequence of unified beginning for each TCPG zone;
Figure 13 B is at the traction current of a row in the time and row's the traction current altogether during the zone fire sequence of delay for each TCPG zone;
Figure 14 is written into discharge for ten point data of arranging Udon IC to hit sequence;
Figure 15 shows the tilting section of nozzle row's downtrend triangle, and for the relevant printing delay of the point data at ' declines ' nozzle place;
Figure 16 shows the deoppilation pulse train;
Figure 17 A is used for having the circuit of open actuator test that the p type drives the unit cell of FET; And
Figure 17 B is used for having the circuit of open actuator test that the n type drives the unit cell of FET.
The specific embodiment
The applicant has developed multiple head device, and described head device uses and is linked at together to form a series of printhead ics (IC) of pagewidth printhead.In this mode, printhead IC can be assembled into printhead, and described printhead can be used for leniently format print in the multiple application of camera with built-in printer and mobile phone.Internally be called the wide region print application by a kind of in the printhead IC of applicant's exploitation recently.The applicant is called ' Udon ' with these printhead IC, and will specifically describe various aspects of the present invention with reference to these printhead IC.Yet, be interpreted as it only for exemplary purposes rather than in order to limit this scope of invention and application.
General introduction
The Udon printhead IC is designed to work with forming other Udon IC that links printhead.The applicant has developed a plurality of link printheads, and wherein a series of printhead IC are installed on the holding components end-to-endly, so that form the pagewidth printhead.Holding components is installed in printhead IC in the printer, and China ink is dispensed to each IC.Described the example of the printhead of the type in USSN11/293820, its disclosure is merged in this paper at this by cross reference.
Be interpreted as, should be interpreted as any printing fluid, unless learn clearly that from context it is only for being used for a kind of colouring agent of image forming print medium any referring to all of term ' China ink '.Printhead IC can be sprayed sightless China ink, adhesive, medicament or other functional liquid with being equal to.
Fig. 1 shows the sketch of the pagewidth printhead 10 with a series of Udon printhead IC 12 that are installed to holding components 14.One nozzle among the angled limit 16 permission IC 12 and those nozzles of the adjacent IC on the paper feed direction 18 are overlapping.Make nozzle among each IC12 overlap two joints between the IC continuous printing is provided.Avoided like this in resulting printed matter, producing " striped ".Linking each printhead IC in this mode allows only to use the IC of varying number to form the printhead of any length of wanting.
Printhead IC 12 is integrated CMOS and MEMS ' chips '.Fig. 3 shows the configuration of the MEMS nozzle 20 on the black ejection side of printhead IC 12.Nozzle 20 is arranged in a row 26 and row 24, so that form the parallelogram array 22 of the part 28 that has ' kink ' or tilt.Row 24 are not consistent with paper feed direction 18, because for the purpose that links with adjacent IC, each limit of array 22 becomes about 45 ° angle.Row 24 are followed this inclination.Except the sloping portion 28 that tilts to " downtrend triangle " 30, row 26 feeds direction perpendicular to paper, and described " downtrend triangle " 30 has the nozzle 20 overlapping with adjacent print IC.Below it is discussed in more detail.
Fig. 2 shows the element of a MEMS spray nozzle device 20 or ' unit cell '.Gone through the structure of unit cell 20 among the USSN11/246687, its content is merged in this paper at this by cross reference.Say that briefly it is the transparent unit cell with the exposed inner feature that Fig. 2 shows as nozzle plate (outer surface of printhead).Nozzle 32 is spray-holes, and China ink is injected by this spray-hole.Heater 34 is arranged in nozzle chambers 36 so that produce the vapor bubbles of spraying ink droplet by nozzle 32.U-shaped sidewall 38 limits the edge in chamber 36.China ink 42 enters chamber 36 by entering the mouth, and described inlet 42 has two organ timbering shape features 44, and cylindricality feature 44 has stopped the pressure pulse in the China ink, so that the intersection that stops between the unit cell is disturbed.Cmos layer limits drive circuit, and has the driving FET 40 that is used for heater 34 and be used for pulse timing and the logic 46 of shaping (profiling).To at length discuss below.
China ink is provided to unit cell 20 from the raceway groove of the opposite side of the wafer substrate of printhead IC.Be described below with reference to Fig. 5 C.The raceway groove at ' back side ' of printhead IC 12 carries out fluid connection via deep etching conduit (not shown) and the unit cell on the front 20 by cmos layer.
The printhead IC 12 of the link that separates combines with holding components 14, thereby does not have printing artefacts on the joint between the adjacent print IC.Each IC 12 comprises ten rows, 26 nozzles 32.As shown in Figure 4, each color has two adjacent rows 26, so that allow five kinds of dissimilar China inks of as many as.Each is to arranging 26 shared China ink supply raceway grooves that are shared on the back side of wafer substrate.
Each row has 640 nozzles, and each color raceway groove has 2 * 640=1280 nozzle, and it is equivalent to each IC 12 5 * 1280=6400 nozzle.11 printhead IC (for example, referring to Fig. 1) that A4/ letter paper width printhead need be connected, making total nozzle counting of assembly printhead is 11 * 6400=70400 nozzle.
Color and arrangement of nozzles
At 1600 dpi, the distance between the print point need be 15.875 m.It is known as a distance (DP).Unit cell 20 has rectangular foot-print (footprint), and it is the wide 5 DP length that multiply by of 2 DP.In order to reach each color 1600 dpi, preferably as shown in Figure 4, row's 26 direction of feed 18 phase deviations each other with respect to paper 48.Fig. 5 A shows the parallelogram that is formed by nozzle by with each row's 26 skews 5 DP subsequently.
The link arrangement of nozzles
Parallelogram 50 does not allow the adjacent printhead IC of array 22 and those to link.In order between the opposed edges nozzle of the edge nozzle of a printhead IC and adjacent IC, to keep constant some distance, the distortions that parallelogram 50 needs a little.Fig. 5 B shows Udon and designs employed distortion.About paper feed direction 18, the part 30 of array 22 is with respect to remainder displacement or " decline " of array.For convenience's sake, the applicant is called downtrend triangle 30 with this part.From their point apart from the aspect, the unit cell 20 on the outward flange of downtrend triangle 30 and unit cell 20 direct neighbors of the edge of adjacent print IC 11.In this mode, it is continuous arrays as them together that the nozzle array of separation is linked at.
' decline ' of downtrend triangle 30 is 10 DP.The point of being printed by the nozzle in the triangle 30 has been delayed ten ' line time ' (line time is the print data according to this some place in the print job, prints delegation from printhead IC, just shoots for ten row's institute's time spents), so that mate with the triangle skew.Between the remainder of downtrend triangle 30 and array 22, there is intermediate zone 28.In this intermediate zone, row 26 ' is hung low ' to downtrend triangle 30.Nine pairs of unit cell 20 1 next line times descend (1 DP, 1 row's time) in proper order, thus little by little bridge joint descend and normal nozzle between the gap.
From the angle of printing, the district's band that hangs low only is used for link, rather than essential.As shown in Figure 6A, only 10 DP places termination on the row of the correspondence in downtrend triangle 30 of row 26.Yet, in the China ink supply raceway groove 50 at the back side of IC 12, form wedge angle (seeing Fig. 6 B) like this.Wedge angle on the direction that China ink flows is problematic, removes because the exhaust bubble may be detained and be difficult to from this angle 52 stagnant wake 54.Fig. 5 C shows the configuration of the China ink supply raceway groove 50 at Udon printhead IC 12 back sides.As seen, the district of hanging low is with 28 to keep black raceway groove 50 angulations less, thereby does not have the flow stagnation district.
Compatibility with different print engine controllers
The Udon printhead IC can be according to print engine controller (PEC) with different pattern operations, and the Udon printhead IC receives its print data from described print engine controller.Specifically, Udon is with two kinds of different mode operations-SoPEC patterns and MoPEC pattern.SoPEC is the PEC that the applicant uses in its SOHO (small office, family office) printer, and MoPEC is the PEC that uses in its mobile communication (for example mobile phone or PDA) printer.Udon does not use the adapter of any kind or intermediary interface to be connected to different PEC.Instead, when energising, Udon determines correct operator scheme (SoPEC or MoPEC).Under each pattern, different functions is all supposed in the contact on each in the printhead IC.
The SoPEC pattern connects
Fig. 7 is Udon IC 12 and the schematic diagram that is connected of SoPEC 56.Each printhead IC 12 all has input end of clock 60, data input pin 58, reseting pin 62 and data output pin 64.Clock and data input pin all are 2 LVDS (low-voltage differential signal transmission) receivers that do not have terminal.Reseting pin 62 is 3.3V Schmidt trigger (Schmitt trigger), and its all control registers are set to known state, and forbidding is printed.Forbid the nozzle shooting in combination, and need the sample (clocked sampled) of three continuous clocks that register is resetted.Data output pin 64 is general outputs, but is generally used for from printhead IC 12 register value being read back SoPEC 56.Interface between SoPEC 56 and the printhead 10 has six connections.
The MoPEC pattern connects
Fig. 8 shows MoPEC 66 and is installed in connection between the printhead IC 12 of the printhead 10 in the mobile device.When IC operates, use some identical connection pins under the MoPEC pattern.Yet, because MoPEC printhead 10 physically less (only having three chips wide, for use on the medium of business card size, printing), and changed by the user more continually, be necessary to simplify as much as possible the interface between MoPEC and the printhead.Reduce the scope of incorrect installation like this and strengthened the availability directly perceived of mobile device.
(ACI) 70 addresses of carrying are the right positive pins of LVDS of the output terminal of clock 60 under the SoPEC pattern.First printhead IC 12 of series connection has the ACI 70 that is set to ground connection 68, the purpose of the addressing that is used for further describing below.Negative pin 60 ground connection are so that remain ' 0 ' voltage with it.Data output pin 64 is connected directly to the ACI 70 of adjacent print IC 12.All IC 12 connect into ring in this mode with last printhead IC 12 of connecting, and this printhead IC 12 has the data output end 64 that connects back MoPEC 66.
Under the MoPEC pattern, reseting pin 62 keeps not connecting, and right negative pin 72 ground connection of data LVDS.Data are used following motor synchronizing data-signal to be connected by one with clock to be transfused to.The annular connection of IC 12 and motor synchronizing data input pin 58 reduce to only two with the quantity of the connection between MoPEC and the printhead.Simplify user's head cartridge like this and changed processing, and reduced the probability of installing incorrectly.
The clock and the data of combination
As shown in Figure 9, the clock of combination and data 58 are pulse width modulating signals.Signal 74 shows a clock cycle and ' 0 ', and signal 76 show a clock cycle with ' 1 '.Udon IC 12 (when in MoPEC pattern following time) obtains its clock as from the low signal that switches paramount (0-1) from each rising edge 78.Therefore, signal all has rising edge 78 in each cycle.At 1/3 place of clock cycle, ' 0 ' descends back signal to ' 0 '.At 2/3 place of clock cycle, ' 1 ' descends back signal to ' 0 '.IC monitors the state at the signal at intermediate point 80 places in cycle, so that read ' 0 ' or ' 1 '.Outside printhead IC addressing
When being connected to MoPEC 66, giving 12 1 of each printhead IC and write the address.Use two electric wires between PEC and the printhead to connect to do like this and need carry out the iterative processing of broadcast addressing individually to each device.Udon connects into ring by the address that data output end or an IC and next IC are carried and realizes.Default or the reset values of data output end 64 is high or ' 1 '.Therefore, each printhead IC 12 all has ' 1 ' address, except first printhead IC 12, its address by its with earthing potential 68 be connected ' being drawn ' to ' 0 '.For give IC 12 unique write the address, MoPEC 66 is sent to broadcasting command in all devices with ' 0 ' address.In response to broadcasting command, the unique IC with ' 0 ' address writes address rewrite with it and is the unique address by the MoPEC appointment, and its data output end 64 is made as ' 0 '.Thereby the ACI 70 of second IC 12 that will connect is pulled to ' 0 ', therefore once more broadcasting command is sent to when writing address ' 0 ' as MoPEC, this second IC, and to have only this second IC be new and unique address with its address rewrite, and its data output end is set at ' 0 '.
Repeat this processing and all have unique mutually address that writes, and last IC sends it back MoPEC 66 with ' 0 ' up to all printhead IC 12.Use this system when starting to the IC addressing, interface only need to have be used for will combination data and clock ' multiple spot is connected ' (being connected in parallel) to the connection of all devices and the data output end of getting back to MoPEC from IC.As mentioned above, the electric interfaces of the simplification between PEC and the head cartridge has strengthened the easiness and the convenience of replacing ink cartridge.
Electrification reset
Udon printhead IC 12 has electrification reset (POR) circuit.Self-initialize allows printhead IC to operate under the MoPEC pattern to the ability of known state, and wherein PEC/ printhead 10 interfaces only have two contacts.
Por circuit is used as two-way reset pin 62 (see figure 7)s and uses.Por circuit drives (drive out) reseting pin 62 always, and the input of IC monitoring reseting pin is distolateral.Allowing SoPEC 56 to exceed the speed limit when needed to drive like this resets.
The PEC interface type detects
When energising, Udon printhead IC 12 switches to another pattern from a pattern, and suppresses fire command and determined the type of coupled PEC up to it.In case it has selected correct operator scheme for PEC, just do not attempt with another PEC type of alignment up to the software reset or outage/circulation (cycle) powers on.
Udon IC 12 can operate according to three kinds of interface modes:
■ SoPEC pattern, wherein clock and data 58 all are that LVDS (low-voltage differential signal transmission) contact is to (seeing Fig. 7 and Fig. 8);
■ MoPEC single-ended mode, wherein clock and data are combined 58, and form single-ended (see figure 8), because data are the pulse widths along the clock signal modulation; And
■ MoPEC LVDS pattern, wherein clock 60 is single-ended, and data 58 are LVDS (if there is the EMI problem, then can use this pattern).
Udon has spent adequate time at each state and has aimed at, if do not realize aiming at, then moves forward in order.
The multistage print data is written into
In printhead IC design before, each unit cell all has the shift register that is used for print data.The print data that is used for whole nozzle array is written into, and then, after the fire command from PEC, nozzle is according to the predetermined sequence shooting of the row of printing.Shift register has occupied the space of the preciousness in the unit cell, and this space can be used for bigger, more powerful driving FET better.More powerful driving FET can provide the driving pulse (about 200nJ) of enough energy in the short period of time to actuator (heat or heat are mixed actuator).
Bigger, more powerful FET has a lot of benefits, special printhead for thermal actuation.Less energy is transformed to the heat of wasting in FET itself, and more energy is passed to heater.Increase the energy that is delivered to heater and make heater surfaces more promptly reach China ink assembly temperature, allow short driving pulse.Short driving pulse allows the zone of heat the short time diffuses to heater from heater around, assembles the needed gross energy of temperature thereby reduced to arrive.The short driving pulse duration also is that the sequence of the nozzle shooting in row's time (time of shooting one row's nozzle) provides wideer scope.
The print data shift register is shifted out unit cell provide the space for bigger driving FET.Yet it has increased the needed wafer region of IC basically.Nozzle array needs adjacent shift register array.Connection between each register and its corresponding nozzle will cause bigger resistance loss than length relatively.It is harmful to for efficient.
As effective concession, the Udon printhead IC will be written into and shoot print data from nozzle array and carry out stage by stage.The print data that is used for the first of nozzle array is written into the register of nozzle array outside.PEC sends fire command after being written into register.Register is sent to the nozzle of the correspondence in the first with data, and wherein they shoot (below will discuss) according to first sequence.In the nozzle shooting in first, register is written into the print data of the next part that is used for array.This system shifts out register from unit cell, gives bigger, more powerful driving FET so that give way.Yet owing to only exist for the enough registers of the nozzle in the part in the array, the resistance loss in the connection between register and the nozzle is exceeded.
Driving logic on the IC 12 is sent to array by row with print data.Nozzle array has 10 rows, 640 nozzles.640 register-stored adjacent with array are used for a row data.Data are hit sequence according to predetermined discharge and are sent to register from PEC.Before, when once being written into the data of whole array, PEC only can sequentially send the data that are used for each row-from arranging 0 to row 9.Yet, in a single day being written into just shooting of each row for its data, PEC need hit sequence with the discharge of Udon and aim at.
The normal operation step of Udon is as follows:
1. register is programmed for control shooting sequence and parameter.
2. for row's printhead data are written into register.
3. transmission fire command, it is latched in the data that are written in the corresponding nozzle, and begins to shoot sequence.
4. when advancing, the shooting sequence is written into next row's data.
5. all rows for delegation repeat.
6. all row for one page repeat.
Temperature control distribution generator (TCPG) zone
China ink viscosity depends on Mo Wendu.Viscosity change can change the droplet ejection characteristics of nozzle.Along the length of pagewidth printhead, temperature can change significantly.These variations of temperature and droplet ejection characteristics have stayed pseudomorphism on printed matter.For compensates, each Udon printhead IC has the series of temperature sensor, and it exports to and drives logic on the chip.Allow like this to regulate driving pulse, thereby eliminate the big difference of droplet ejection characteristics according to current black temperature along this point of printhead.
With reference to Figure 10, each Udon IC 12 has eight temperature sensors 74 that are provided with along array 22.The temperature of the adjacent area of each sensor 74 sensing nozzle, described zone are known as temperature control distribution generator zone, or TCPG zone 76.TCPG zone 76 is along the IC band of 12 downward ' vertically ', its shared temperature and firing data (ask for an interview the discharge of describing after a while and hit sequence).Based on the zone and should the zone in temperature be each color settings pulse width.
The cycle sensor activation
Temperature detection between sensor 74 allows 0 ℃ and 70 ℃, described detection has the typical degree of accuracy after 2 ℃ calibration.Can cut off each temperature sensor, and the temperature sensor 74 of neighboring region 78 can be used in the zone.It will come conservation of power with smallest effect based on the correct adjusting to driving pulse, because sensor produces owing to conduction sensing in the zone of their outside heat.If the steady state operation temperature does not almost have or variation along IC is not shown, then close all sensors except that, or to close all the sensors really and do not use any temperature-compensating be suitable.The quantity that reduces the sensor of once-through operation has not only reduced power consumption, has also reduced the noise of other circuit among the IC.
The temperature type
Each TCPG zone 76 has the independently register that is used for five kinds of China inks.The temperature of China ink is classified as four temperature ranges that limited by three predetermined temperature threshold.These three threshold values are provided by PEC.Distribution generator in the Udon logic is adjusted the distribution of driving pulse, so that adapt with the Current Temperatures classification.
Inferior injection pulse
When heter temperature rose to bubble assembly temperature, thermal diffusion was in China ink.Thus, the temperature of the China ink in the nozzle will depend in its frequent degree of being shot of this stage of print job.The pagewidth printhead has big nozzle array, and any moment during print job, and a part of nozzle will not spray China ink.The zone of the chip of thermal diffusion around the nozzle of shooting is with respect to No Fire Zone territory these regional temperature that raise.Consequently, the China ink in the non-injection nozzle will be lower than the temperature in the nozzle of having shot a string ink droplet.Udon IC 12 can not send ' inferior injection ' pulse to non-shooting nozzle between active period, so that make Mo Wendu keep identical with the temperature of the nozzle of just frequently being shot.Inferior injection pulse is not enough to spray a China ink, but heat can diffuse into China ink.To enter black heat identical with conduction before the bubble in the shooting nozzle is assembled approximately for this heat.Consequently, the temperature in all nozzles keeps even relatively.Help to keep viscosity and droplet ejection characteristics constant like this.Inferior injection pulse reduces its energy by shortening its duration.
Driving pulse is shaped
The profile that changes driving pulse on one's own initiative provides many benefits, comprising:
■ dashes for the China ink that changes and the best pistol shot pulse of temperature
■ made the zone warm before shooting
■ closes or slows down the IC (Udon provides information, the PEC control rate) that becomes too hot just
■ adjusts the voltage drop that is caused by the distance (unnecessary resistance) from power supply
■ reduces the energy that is input to chip, because warm China ink need spray than cold China ink energy still less
Pulse profile can change according to temperature and black type.The pistol shot pulse that the TCPG zone is produced dashes and is stored in the big register, described register is included in each value, general China ink and regional value and the threshold value in five kinds of China inks in each of four temperature ranges, and each that perhaps is included in four temperature ranges adds each value, regional value and the threshold value in five kinds of China inks in the general China ink.These values must be provided to Udon, and can be by the QA chip on the print cartridge (ask for an interview RRC001US, it incorporates this paper into by reference at this), PEC or other component stores and/or transmission.
The control impuls width
By changing the pulse duration, rather than changing voltage or electric current, to adjust that pistol shot pulse dashes be easily.Apply voltage from the outside.Change electric current and will be referred to resistance loss.On the contrary, pulse timing is programmable fully.
Desirable China ink for Udon sprays pistol shot pulse towards typically between 0.4 s and 1.4 s.Inferior injection pistol shot pulse dashes usually less than 0.3 s.More particularly, to dash be the function of Several Factors to pistol shot pulse:
■ MEMS characteristic
■ China ink characteristic
The ■ temperature
■ FET type
The amplitude that best pistol shot pulse dashes can change according to C﹠T.The injection pulse time for each color of all the temperature bands in the Udon storage All Ranges.
Discharge hits sequence
If all nozzles among the row are all shot simultaneously, then the unexpected increase of traction current is for printhead IC with support for the circuit too high.For fear of this situation, the group that can shoot nozzle or nozzle according to staggered interval.Yet, simultaneously, or even shoot adjacent nozzle continuously, all can cause the anisotropy of ink droplet.At first, instillation (connecting the ink droplet of injection and the black buttress shaft of the China ink in the nozzle before droplet separates immediately) can cause the little of nozzle plate surface to be overflowed.Little overflowing can partly be stopped up adjacent nozzle, and the ink droplet that sprays is drawn from its track of wanting partially.The second, the air force turbulent flow that is caused by the ink droplet of an injection can influence from the adjacent nozzle track of (or at once afterwards) ink droplet of spraying simultaneously.The ink droplet of second shooting can be drawn into first slip-stream, and anisotropy.The 3rd, the intersection of the liquid between the adjacent nozzle is disturbed the anisotropy that can cause ink droplet.
Udon addresses this problem like this: disperse the group of the nozzle of shooting simultaneously, shoot the nozzle from the group of each dispersion in proper order then, thereby the nozzle of order shooting is spaced apart.Nozzle shooting sequence continues in this mode, and all nozzles (those have been written into print data) in this row are all shot.
In order to do like this, each row's nozzle all is divided into a plurality of adjacent spans, and shoots simultaneously from a nozzle of each span.From the nozzle of the shooting subsequently of each span nozzle of the Forward Firing shift value of being separated by with it.This shift value can not be the factor (that is to say displacement and span prime number each other) of stride numbers, thereby can not shoot simultaneously or continuously at the nozzle of the boundary of adjacent span.
Span
Span is the quantity of this row's continuous nozzle, and a nozzle shooting is wherein once only arranged.Figure 11 shows the part row of shooting nozzle, and the span of three nozzles and the span of Duan Youwu nozzle of same row are wherein arranged.For the purpose of signal, shift value is one.Yet as mentioned above, in practice, it is not a suitable shift value, because adjacent nozzle will be shot continuously.Disturb mutually from the ink droplet of adjacent model shooting from the flame of the ink droplet of first nozzle shooting back that fails to be convened for lack of a quorum with it at once.This also is a problem for the China ink supply that flow to adjacent nozzle.
For the span of three nozzles, before the whole row of shooting, three shootings are arranged.
■ shoots for the first time: shoot every two nozzles among the row
■ shoots for the second time: the nozzle shooting of a side of first nozzle
■ shoots for the third time: all shoot with all nozzles that first nozzle is separated by among this row of nozzle shooting-now of one
Nozzle among the ■ row N+2 uses identical span pattern to begin their shooting circulation
■ is once any, and 1/3rd in a row the nozzle shot
For the span of five nozzles, five shootings before hitting, whole discharge are arranged, and once any, 1/5th shootings in a row the nozzle.
In opposite extreme situations (for the Udon printhead IC):
■ span=1 is shot all nozzles among the row simultaneously, has drawn too many electric current, and will damage IC;
■ span=640, nozzle of a round may be oversize but finish row's time of being distributed.
Under any circumstance, span is only controlled the maximum quantity of nozzle that can a round.Each independently nozzle still need the actual shooting of 1 in its shift register.In the example below, we suppose that IC is printing pure color rows, thereby each nozzle of this color all will be shot.In fact, this situation is very rare.
Displacement
The shift value of the example shown in Figure 11 is 1.That is to say the shooting of nozzle, the next nozzle shooting on the left side then, the next one etc. then.As mentioned above, this is unpractical.Figure 12 shows the section that span displacement is 3 the nozzle row with 5 spans.
■ shoots for the first time: row 1 shooting
■ shoots for the second time: the shooting nozzle is the row 4 that stride across 3 nozzles
■ shoots for the third time: counting is enclosed bag (wrap around) and is got back to nozzle 2
The 4th shooting of ■: nozzle 5 shootings
The 5th shooting of ■: 5 nozzles of all in the nozzle 3 shooting-spans are all shot now.
For each nozzle among the row is just in time shot once, displacement can not be the factor of span, and promptly span can not be shifted and divide exactly (not having remainder).In order on time and space, droplet to be separated maximization, and each nozzle of every row is just in time shot once, be should be the span displacement and select the nearest mutual prime number of square root with span.For example, for span 27, span displacement is 5 to be suitable.
Shooting postpones
Shoot simultaneously that all nozzles among the row will the row's of being pulled in time the duration keep (approximately) constant a large amount of electric currents.It still needs power supply to jump to maximum current from zero current in the very short time.This high rate of change that has produced traction current is up to reaching maximum.Unfortunately, the quick increase of electric current has produced inductance, and this inductance will increase circuit impedance.For high impedance, driving voltage ' rapid drawdown ' is got back to normally up to inductance, and promptly electric current stops to increase.In printhead IC, the essential actuator supply voltage that keeps is in very narrow scope, so that droplet size that is consistent and directionality.
Can be changed by TCPG because the pistol shot pulse in each zone dashes, then it can be used for the beginning of the shooting in each zone on the deferred printing head.This has reduced the rate of change of the electric current during the shooting.Figure 13 A and 13B show the relation between zone fire delay and the current drain.Figure 13 A shows the extreme case of the electricity usage of (this is the situation of worst for power supply, because 80 shootings of naming a person for a particular job on the zone) when printing pure color rows (a solid line of color).
Figure 13 A shows not shooting delay between the zone.Each zone has 4 spans, and each span has 20 nozzles.The shooting in the whole row time (row is the available time of nozzle shooting that makes whole row the time) of each zone.Therefore, in any moment of row's time durations, all shooting (traction current) from 4 nozzles in all eight zones.Thereby the profile of supply electric current is long, flat step function 78, and each zone is all identical.For whole row's profile the adding up of step function of each profile 78.Theoretically, the forward position 90 of step function 80 is vertical, but in fact it is very steep, has reached maximum current level 82 up to it.The high rate of change of electric current can cause undesirable voltage dip.
Figure 13 B shows the electric current supply profile when the zone is shot stage by stage.Staggered for the shooting that makes each zone, must shorten the time that the nozzle in each span is shot.In the example shown in Figure 13 B, each span have row's time half shoot its nozzle.Shoot the needed time in order to compress each span, the quantity of nozzle can reduce in the span.For example, the span among Figure 13 B is 10, therefore will shoot simultaneously from 8 nozzles (10 * 8=80 nozzle/zone) of each span.The traction current that adds up of eight nozzles is greater than the electric current of 4 nozzle shootings of each span shown in Figure 13 A.So each regional traction current is two times of traction current in the zone among Figure 13 A among Figure 13 B, but electric current was pulled in the time of half.In the beginning of row's time, electric current 84 is supplied to zone 1.Begin section after electric current 94 is supplied to zone 2 in the time delay of setting, and zone 3 similarly is delayed etc. with respect to zone 2, up to the zone 8 beginnings its shoot sequence.Need be for the delay in each zone by timing, thus zone 8 half row's time past tense or before begin shooting.
The electric current that adds up supply profile 86 shows a series of 8 ladders fast in the electric current supply when electric current reaches its maximum 88.Maximum current 88 is greater than the maximum current 82 in the non-delay zone fire, but the increment rate of supply electric current 92 is less.This has produced less impedance in electric current, thereby voltage dip is lower.Under each situation, the gross energy of use is identical with the given row time, but the distribution of energy consumption has been adjusted.
Normal fire order
As mentioned above, print data is sent to printhead IC 12 by one time one with arranging, follows by fire command.In the past, in the nozzle array each independently unit cell all has a shift register, is each nozzle storaging printing data (' 1 ' or ' 0 ') in each line time (line time is the time that delegation spent of printhead prints printed matter).Print data for whole array will be written in the shift register before fire command initialization shooting sequence.For each row is written into and shoots print data, the shift register of lesser amt can be set near the of array rather than in each unit cell by stage by stage.Shifting out shift register from unit cell 20 allows driving FET 40 (see figure 2)s bigger.This has improved printhead efficient, and reason is as follows.
If promptly assembled by the vapor bubbles that heating element produces, then thermal printer head IC is more efficient.Before bubble was assembled, less thermal diffusion was to China ink.The assembly of bubble has faster reduced the hot time that can diffuse into heater wafer area on every side.For bubble is assembled quickly, electric pulse need have the short duration, but still provides identical power (being about 200 nJ) to heater.This needs the power of the driving FET of each nozzle to increase the power of driving pulse.Yet, increase the power that drives FET and increased its size.This has strengthened the wafer region that is occupied by nozzle and interlock circuit thereof, thereby has reduced the spray nozzle density of printhead.The minimizing of spray nozzle density is harmful to for print quality and compact print head design.By shift register is removed from unit cell, driving FET can be more powerful and to need not be that spray nozzle density is given way.
One time one row ground of Udon design writes nozzle array with data.Yet the printhead IC that once is written into and shoots plurality of rows also can realize similar benefit.Yet, should notice that being electrically connected between shift register and the corresponding nozzle should keep short relatively, thereby not cause high resistance loss.
Being written into and shooting print data a delegation needs PEC to send data with the alignment preface of its printing.Data for whole nozzle array were written into before shooting in advance, and are critical thereby PEC hits sequence independence for the discharge of being selected by printhead IC.For Udon, PEC need come launcher platoon's data according to predetermined sequence.
Print-head nozzle is according to span/displacement shooting sequence is normally shot, and the zone that postpones begins as mentioned above.China ink is supplied to the nozzle of two adjacent rows on the front of IC at the supply raceway groove 50 (seeing Fig. 5 C) at the back side of printhead IC 12, promptly arrange 0 and row 1 spray same color, row 2 and row 3 spray another kind of color or the like.The Udon printhead IC has ten row's nozzles, and it can designated color CMYK, IR (being used to utilize the infrared China ink of the sightless data of human eye to medium encoder) or CMYKK.For fear of the problem of black supply stream, in twice transmission,, promptly arrange 0, row 2, row 4 and arrange 6 every a row ground shooting, be row 1, row 3, row 5 etc. then, up to having shot ten all rows.
Discharge hits and should be timed, thereby each row spend just in time less than 10% of total line time and shoots.The current data that are written into are only shot in fire command.When operating under the SoPEC pattern, the Udon printhead IC receives ' next data ' order that is written into next row's data according to predetermined sequence.Under the MoPEC pattern, each row's data must specifically be addressed to its row.
Moving of paper also taken into account, and row's time, less than 0.1 line time, with 10.1 DP (some distance), vertical color was apart from the line space that appears as 10 DP on paper for just in time.The row of the nozzle of an odd and even number same color, spaced apart with 3.5 DP vertically, and with the separately shooting of 0.5 line time, thus obtain the point that on paper, vertically separates with 5 DP.
The shooting circulation
Figure 14 shows for the data flow of data line and fire command sequence.When receiving fire command in data flow, the data in this row's the shift register are transferred to the some latch in each unit cell, and begin the shooting circulation, so that have each nozzle ejection China ink of 1 from its latch.Be written into the data of next row in the fire order simultaneously.The downtrend triangle and the part shooting of hanging low postpone
The compensation that descends is to drive the compensation that logic 46 (see figure 2)s apply to the downtrend triangle 30 (seeing Fig. 5 C) of the nozzle in the left side of tilting zone 28 and the nozzle array 22 on each IC 12 by Udon.As shown in figure 15, need be delayed the line time of some for the print data of the nozzle that shifts from the remainder of array 22.Figure 15 shows the row's 26 of IC 12 nozzle.Nozzle in the downtrend triangle 30 is 10 some distances of nozzle transfer of non-displacement from this row all.Nozzle in the sloping portion 28 of connection downtrend triangle 30 and non-displacement nozzle has the displacement that is indexed as a point of per two nozzles distance.In the zone 28 of hanging low that tilts, drive the logic delay of correlation hit points certificate accordingly and carry out index.
Spray nozzle clogging is removed
During the inactivity minute section, or even between page or leaf and page or leaf, particularly under higher environment temperature, nozzle may be stopped up by more tacky or more dried China ink.The China ink evaporation of water from nozzle, thus the viscosity of China ink is increased to the point that bubble can not spray ink droplet.Nozzle becomes and blocks and can't operate.
Many printers have head maintenance mechanism, and it can make the nozzle of obstruction restore, and the outer surface of memory dump head.These methods produce vacuum to draw China ink by nozzle, thereby the China ink of less viscosity refills nozzle.Handle by this, a large amount of relatively China inks are wasted, thereby need to change more continually print cartridge.
The Udon printhead IC has can be before print job or the service mode of manipulate.Under service mode, drive the deoppilation pulse that logic produces the actuator that is used for each nozzle, unless dead nozzle map (describing below) indicates this actuator to lose efficacy.For in the print job manipulate, nozzle should be in the firing through gaps deoppilation pulse between page or leaf and the page or leaf, and does not disturb paper.
The pulse of deoppilation pulse ratio driven is longer.Bigger by bubble than the pulse shaping of long duration, and apply than the bigger motive force of shooting motive force to China ink.It provides the additional power that high viscous ink may need of spraying to pulse.
As provision, before the deoppilation pulse, can carry out a series of injection pulses China ink is warmed, viscosity reduces.Figure 16 shows typical deoppilation impulse train, and the inferior injection pulse 94 of a series of weak points (dashing with respect to pistol shot pulse) is followed in one of them deoppilation pulse 96 back.Each time injection pulse 94 has deficiency so that the energy of China ink is assembled and sprayed to bubble.Yet a series of these pulses fast Mo Wendu that can raise is so that auxiliary subsequently deoppilation pulse 96.
Open actuator test
Udon printhead IC 12 is supported open actuator test.Open actuator test (OAT) is used for finding whether nozzle array has actuator scaling loss and fracture (being commonly referred to as becomes ' open circuit ' or ' open-circuit ').
On wafer substrate, make the MEMS nozzle arrangements and always cause some out of order nozzles.Can after making, use wafer prober to locate these " dead nozzles " immediately.Known the position of dead nozzle, can come print engine controller (PEC) is programmed with dead nozzle map.It is used for using the technology such as nozzle redundancy (printhead IC has than essential more nozzle, and uses " standby " nozzle to print the point that is assigned to dead nozzle usually) to compensate dead nozzle.
Unfortunately, the length of life nozzle at printhead also can lose efficacy.In case they have been installed to print head assembly and have been installed in the printer, just can not use wafer prober to locate these nozzles.Along with time lapse, the quantity of dead nozzle increases, and because PEC does not recognize them, so there is not their trial of compensation.It finally causes impairing the visible abnormality of print quality.
In hot ink-jet print head and hot hybrid ink jet printhead, most failures all are that resistance heater scaling loss and damage or open-circuit cause.Nozzle may can not spray China ink owing to block, but is not " dead nozzle ", and can recover normal by printer maintenance mechanism.Determine that by test on the chip which nozzle is dead, print engine controller can upgrade its dead nozzle map periodically.By making dead nozzle map accurate, PEC can using compensation technology (for example nozzle redundancy) prolongs the service life of printhead.
Udon IC open actuator test is compared the resistance and the predetermined threshold of actuator.High (or infinitely-great) resistance indication actuator failure, and this information is fed back PEC, compensates form so that upgrade its dead nozzle.To notice that importantly OAT can find the open-circuit nozzle, rather than stopped nozzles.
Thermal actuator and heat are mixed actuator and are all used heating element, and can use OAT with being equal to.Similarly, driving FET can be N type or P type.Figure 17 A and 17B show the circuit that is used for OAT, and described OAT is applied to have a unit cell by p-FET and the separately-driven heating element of n-FET.
In Figure 17 A, no matter when assert ' row start ' (row enable) (RE) 98 and ' row start ' (column enable) (CE) 100 (its contact receives ' 1 '), all during printing, start and drive p-FET 40.Start driving FET 40 heating element 34 is switched to Vpos 104, so that activate unit cell.When assert that not row's startup 98 or row start 100, the n-FET that releases is activated.When not activating unit cell and eliminate any electrolysis path, the n-FET 112 that releases guarantees that the voltage of sensing node 120 is dragged down.
When assert OAT 106, AND door 108 will drive the grid of p-FET 40 and draw high so that forbid it.Assert that OAT 106 also draws high the grid of sensing n-FET 114, so that sensing output 116 is connected with sensing node 120.For the n-FET112 that releases of forbidding, the voltage at sensing node 120 places will still be pulled low to earthing potential 68 by heating element 34.Therefore, sensing output 116 is an electronegative potential, is still moving with the indication actuator.Yet if heating element 34 is open circuit (inefficacy), the voltage of sensing node 120 keeps high potential, and it draws high sensing output 116 so that indicate dead nozzle.It is fed back and upgrades the PEC that dead nozzle map and initialization survey compensate (if possible).
Unit cell circuit shown in Figure 17 B uses to drive n-FET 40.In this embodiment, assert that row's startup 98 and row start 100 grids that will drive n-FET 40 and are pulled to high potential, also allow Vpos 104 to leak to earthing potential by heater 34 so that start it.In addition, no matter when assert that row's startup 98 and row start 100, all forbid the p-FET 118 that releases.
For the initialization actuator test, assert that together OAT 106, row's startup 98 and row start 100.It drives n-FET by using NAND logical one 10 that grid is dragged down to forbid.It has also opened sensing n-FET 114 so that sensing output 116 is connected with sensing node 120.For with the heater 34 of earthing potential 68 insulation, when forbidding drove FET40, sensing node 120 was drawn high, and the actuator of high sensing output 116 indication work.If heater 34 is damaged, then sensing node 120 is stayed low-voltage at the last FET 40 of once driving after starting.Therefore, when starting OAT, sensing output 116 is low-voltage, and PET writes down the nozzle record nozzle map till death of checkmating.
Being interpreted as open actuator test should carry out after printhead IC is finished printing at once.After unactivated a period of time, release p-FET 118 or n-FET 112 drop to low-voltage with sensing node.Gap between the type face is opportunity easily for carrying out open actuator test.
Only the present invention has been described at this by example.Those skilled in the art will readily appreciate that the many distortion and the modification of the spirit and scope that do not depart from wide in range inventive concept.

Claims (19)

1. printhead IC comprises:
Nozzle array;
Jet actuator corresponds respectively to each nozzle, and described jet actuator has the resistance heater that is activated when actuator is black by the nozzle ejection of correspondence;
Drive circuit is used to receive print data and drives signal according to the print data utilization and activates actuator; And
The open actuator test circuit is used for assessing actuator out of order while whether in that the resistance of resistance heater is compared with predetermined threshold, optionally forbids described actuator when driving signal when actuator receives.
2. printhead IC according to claim 1 wherein, during use, is used to adjust the print data that is received by drive circuit subsequently from the feedback of open actuator test circuit.
3. printhead IC according to claim 1, wherein, the open actuator test circuit produces the feedback of defective nozzle during print job.
4. printhead IC according to claim 1 wherein, produces the feedback that defective nozzle is arranged in the predetermined amount of time of open actuator test circuit after print head operation.
5. printhead IC according to claim 1, wherein, the open actuator test circuit produces the feedback that defective nozzle is arranged between each page of print job.
6. printhead IC according to claim 1, wherein, drive circuit has the driving FET of the electric current that controls to resistance heater and be used for starting the logic that drives FET and forbid driving FET when receiving driving signal and open actuator test signal when receiving the driving signal.
7. printhead IC according to claim 1, wherein, drive circuit has the FET of releasing, and when drive circuit did not receive driving signal or open actuator test signal, it was zero that this FET that releases leaks any voltage drop on the resistance heater lentamente.
8. printhead IC according to claim 1, wherein, drive circuit has sensing node between drain electrode that drives FET and resistance heater, and the open actuator test circuit has sensing FET, this sensing FET is activated when receiving the open actuator test signal, thereby uses the voltage of the drain electrode of sensing FET to come the instruction heater element whether fault is arranged.
9. printhead IC according to claim 8, wherein, driving FET is p type FET.
10. printhead IC according to claim 1, wherein, drive circuit receives the print data of the array in a plurality of sequences part and in the fire command of the end of each sequence part.
11. printhead IC according to claim 1 also comprises a plurality of temperature sensors of the temperature that is used for the printhead IC in each zone of sensing respectively.
12. printhead IC according to claim 1, wherein, drive circuit is sent to the driving pulse of nozzle according to the temperature adjustment of the printing fluid in the nozzle.
13. printhead IC according to claim 11, wherein, when one or more temperature sensor indicated temperatures had surpassed predetermined maximum, drive circuit stopped the driving pulse that is sent at least some nozzles in the array.
14. printhead IC according to claim 1, wherein, driving pulse comprises having and is enough to from the injection pulse of the energy of the nozzle ejection printing fluid of specifying shooting at that time and has the inferior injection pulse that is not enough to from the energy of the nozzle ejection printing fluid of specifying shooting at that time.
15. printhead IC according to claim 11, wherein, during use, drive circuit is exported in response to temperature sensor and is adjusted the driving pulse profile.
16. printhead IC according to claim 11 wherein, during use, can used deexcitation temperature sensor after a period of time.
17. printhead IC according to claim 1, wherein, each row's nozzle is divided into a plurality of groups, and each group all has at least one nozzle, and other group postpones driving pulse is sent to a group drive circuit with respect at least one.
18. printhead IC according to claim 17, wherein, during use, drive circuit activates nozzle among this each row according to the shooting sequence, described shooting sequence starts nozzle in each group so that jet printing liquid simultaneously, and start another nozzle in each group subsequently, jet printing liquid sequentially thus, make in nozzle and each group of the shooting subsequently in each group before the nozzle of shooting be separated by and be scheduled to the nozzle of minimum number at least.
19. printhead IC according to claim 1, wherein, drive circuit is configured to two kinds of pattern operations, be printing model and service mode, the driving pulse that this drive circuit produces in printing model is a print pulse, driving pulse is the deoppilation pulse in service mode, makes the deoppilation pulse have the duration longer than print pulse.
CN2006800560609A 2006-10-09 2006-10-09 Printhead ic with open actuator test Expired - Fee Related CN101522428B (en)

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TWI380908B (en) 2013-01-01

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