HK64497A - Energy control circuit for a thermal inkjet printhead - Google Patents

Energy control circuit for a thermal inkjet printhead

Info

Publication number
HK64497A
HK64497A HK64497A HK64497A HK64497A HK 64497 A HK64497 A HK 64497A HK 64497 A HK64497 A HK 64497A HK 64497 A HK64497 A HK 64497A HK 64497 A HK64497 A HK 64497A
Authority
HK
Hong Kong
Prior art keywords
control circuit
inkjet printhead
energy control
thermal inkjet
thermal
Prior art date
Application number
HK64497A
Other languages
English (en)
Inventor
Rajeev Badyal
Sam Mahjouri
Donald M Reid
Michael J Gilsdorf
Original Assignee
Hewlett Packard Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of HK64497A publication Critical patent/HK64497A/xx

Links

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
    • B41J2/005—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
    • B41J2/04548—Details of power line section of control 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
    • B41J2/0455—Details of switching sections of circuit, e.g. transistors
    • 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
    • B41J2/0457—Power supply level being detected or varied
    • 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
    • B41J2/0458—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on heating elements forming bubbles
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
HK64497A 1991-02-08 1997-05-15 Energy control circuit for a thermal inkjet printhead HK64497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/652,965 US5083137A (en) 1991-02-08 1991-02-08 Energy control circuit for a thermal ink-jet printhead

Publications (1)

Publication Number Publication Date
HK64497A true HK64497A (en) 1997-05-23

Family

ID=24618949

Family Applications (1)

Application Number Title Priority Date Filing Date
HK64497A HK64497A (en) 1991-02-08 1997-05-15 Energy control circuit for a thermal inkjet printhead

Country Status (5)

Country Link
US (1) US5083137A (de)
EP (1) EP0499373B1 (de)
JP (1) JP3217836B2 (de)
DE (1) DE69214317T2 (de)
HK (1) HK64497A (de)

Families Citing this family (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG47435A1 (en) * 1992-10-08 1998-04-17 Hewlett Packard Co Printhead with reduced interconnections to a printer
US5357081A (en) * 1993-01-21 1994-10-18 Hewlett-Packard Company Power supply for individual control of power delivered to integrated drive thermal inkjet printhead heater resistors
US5515084A (en) * 1993-05-18 1996-05-07 Array Printers Ab Method for non-impact printing utilizing a multiplexed matrix of controlled electrode units and device to perform method
US5623297A (en) * 1993-07-07 1997-04-22 Intermec Corporation Method and apparatus for controlling a thermal printhead
US5598189A (en) * 1993-09-07 1997-01-28 Hewlett-Packard Company Bipolar integrated ink jet printhead driver
JPH07251506A (ja) * 1994-02-18 1995-10-03 Xerox Corp 加熱素子制御システム
US6070969A (en) 1994-03-23 2000-06-06 Hewlett-Packard Company Thermal inkjet printhead having a preferred nucleation site
US5519417A (en) * 1994-03-31 1996-05-21 Xerox Corporation Power control system for a printer
US5521620A (en) * 1994-05-20 1996-05-28 Xerox Corporation Correction circuit for an ink jet device to maintain print quality
JPH0839809A (ja) * 1994-07-29 1996-02-13 Canon Inc 記録ヘッド及び該記録ヘッドを用いた記録装置
SE503955C2 (sv) * 1994-09-19 1996-10-07 Array Printers Ab Metod och anordning för matning av tonerpartiklar i en printerenhet
JP2001509744A (ja) * 1994-12-15 2001-07-24 アライ プリンターズ アクティエボラーグ パウダ粒子を直接付着させるシリアル印刷システム
US5818480A (en) * 1995-02-14 1998-10-06 Array Printers Ab Method and apparatus to control electrodes in a print unit
JP3124696B2 (ja) * 1995-03-17 2001-01-15 キヤノン株式会社 記録ヘッド及びその記録ヘッドを用いた記録装置
US5675365A (en) * 1995-09-13 1997-10-07 Xerox Corporation Ejector activation scheduling system for an ink-jet printhead
US6000786A (en) * 1995-09-19 1999-12-14 Array Printers Publ. Ab Method and apparatus for using dual print zones to enhance print quality
SE506483C2 (sv) 1996-03-12 1997-12-22 Ito Engineering Ab Tryckverk av toner-jet typ
SE506484C2 (sv) 1996-03-12 1997-12-22 Ito Engineering Ab Tryckverk av toner-jet-typ med elektriskt skärmad matris
US5847733A (en) * 1996-03-22 1998-12-08 Array Printers Ab Publ. Apparatus and method for increasing the coverage area of a control electrode during direct electrostatic printing
US5971526A (en) * 1996-04-19 1999-10-26 Array Printers Ab Method and apparatus for reducing cross coupling and dot deflection in an image recording apparatus
US5818490A (en) * 1996-05-02 1998-10-06 Array Printers Ab Apparatus and method using variable control signals to improve the print quality of an image recording apparatus
US6302504B1 (en) 1996-06-26 2001-10-16 Canon Kabushiki Kaisha Recording head and recording apparatus using the same
US5901425A (en) 1996-08-27 1999-05-11 Topaz Technologies Inc. Inkjet print head apparatus
US5774159A (en) * 1996-09-13 1998-06-30 Array Printers Ab Direct printing method utilizing continuous deflection and a device for accomplishing the method
US5956064A (en) * 1996-10-16 1999-09-21 Array Printers Publ. Ab Device for enhancing transport of proper polarity toner in direct electrostatic printing
US5889542A (en) * 1996-11-27 1999-03-30 Array Printers Publ. Ab Printhead structure for direct electrostatic printing
US5959648A (en) * 1996-11-27 1999-09-28 Array Printers Ab Device and a method for positioning an array of control electrodes in a printhead structure for direct electrostatic printing
US5966152A (en) * 1996-11-27 1999-10-12 Array Printers Ab Flexible support apparatus for dynamically positioning control units in a printhead structure for direct electrostatic printing
US5984456A (en) * 1996-12-05 1999-11-16 Array Printers Ab Direct printing method utilizing dot deflection and a printhead structure for accomplishing the method
US6011944A (en) * 1996-12-05 2000-01-04 Array Printers Ab Printhead structure for improved dot size control in direct electrostatic image recording devices
US6367903B1 (en) * 1997-02-06 2002-04-09 Hewlett-Packard Company Alignment of ink dots in an inkjet printer
US6012801A (en) * 1997-02-18 2000-01-11 Array Printers Ab Direct printing method with improved control function
WO1998040218A1 (en) * 1997-03-10 1998-09-17 Array Printers Ab Direct printing method with improved control function
IT1293885B1 (it) 1997-04-16 1999-03-11 Olivetti Canon Ind Spa Dispositivo e metodo per controllare l'energia fornita ad un resistore di emissione di una testina di stampa termica a getto di inchiostro e
US6132029A (en) * 1997-06-09 2000-10-17 Array Printers Ab Direct printing method with improved control function
US6017115A (en) * 1997-06-09 2000-01-25 Array Printers Ab Direct printing method with improved control function
US6183056B1 (en) * 1997-10-28 2001-02-06 Hewlett-Packard Company Thermal inkjet printhead and printer energy control apparatus and method
US6193345B1 (en) * 1997-10-30 2001-02-27 Hewlett-Packard Company Apparatus for generating high frequency ink ejection and ink chamber refill
US6102526A (en) * 1997-12-12 2000-08-15 Array Printers Ab Image forming method and device utilizing chemically produced toner particles
US6030070A (en) * 1997-12-19 2000-02-29 Array Printers Ab Direct electrostatic printing method and apparatus
US6027206A (en) * 1997-12-19 2000-02-22 Array Printers Ab Method and apparatus for cleaning the printhead structure during direct electrostatic printing
US6086186A (en) * 1997-12-19 2000-07-11 Array Printers Ab Apparatus for positioning a control electrode array in a direct electrostatic printing device
US6070967A (en) * 1997-12-19 2000-06-06 Array Printers Ab Method and apparatus for stabilizing an intermediate image receiving member during direct electrostatic printing
US6257708B1 (en) 1997-12-19 2001-07-10 Array Printers Ab Direct electrostatic printing apparatus and method for controlling dot position using deflection electrodes
US6209990B1 (en) 1997-12-19 2001-04-03 Array Printers Ab Method and apparatus for coating an intermediate image receiving member to reduce toner bouncing during direct electrostatic printing
US6199971B1 (en) 1998-02-24 2001-03-13 Arrray Printers Ab Direct electrostatic printing method and apparatus with increased print speed
US6074045A (en) * 1998-03-04 2000-06-13 Array Printers Ab Printhead structure in an image recording device
US6174048B1 (en) 1998-03-06 2001-01-16 Array Printers Ab Direct electrostatic printing method and apparatus with apparent enhanced print resolution
US6082850A (en) * 1998-03-19 2000-07-04 Array Printers Ab Apparatus and method for controlling print density in a direct electrostatic printing apparatus by adjusting toner flow with regard to relative positioning of rows of apertures
US6102525A (en) * 1998-03-19 2000-08-15 Array Printers Ab Method and apparatus for controlling the print image density in a direct electrostatic printing apparatus
US6081283A (en) * 1998-03-19 2000-06-27 Array Printers Ab Direct electrostatic printing method and apparatus
US6217239B1 (en) * 1998-03-25 2001-04-17 Asahi Kogaku Kogyo Kabushiki Kaisha Temperature control apparatus
US6293654B1 (en) 1998-04-22 2001-09-25 Hewlett-Packard Company Printhead apparatus
ATE215238T1 (de) 1998-06-15 2002-04-15 Array Printers Ab Verfahren und vorrichtung für direktes elektrostatisches drucken
EP0965455A1 (de) 1998-06-15 1999-12-22 Array Printers Ab Verfahren und Gerät für direktes elektrostatisches Drucken
US6116717A (en) * 1998-09-15 2000-09-12 Lexmark International, Inc. Method and apparatus for customized control of a print cartridge
US6729707B2 (en) 2002-04-30 2004-05-04 Hewlett-Packard Development Company, L.P. Self-calibration of power delivery control to firing resistors
US6755495B2 (en) 2001-03-15 2004-06-29 Hewlett-Packard Development Company, L.P. Integrated control of power delivery to firing resistors for printhead assembly
US6331049B1 (en) 1999-03-12 2001-12-18 Hewlett-Packard Company Printhead having varied thickness passivation layer and method of making same
CA2311017C (en) * 1999-06-14 2004-07-20 Canon Kabushiki Kaisha Recording head, substrate for use of recording head, and recording apparatus
US6286924B1 (en) 1999-09-14 2001-09-11 Lexmark International, Inc. Apparatus and method for heating ink jet printhead
US6439678B1 (en) * 1999-11-23 2002-08-27 Hewlett-Packard Company Method and apparatus for non-saturated switching for firing energy control in an inkjet printer
JP3442027B2 (ja) * 2000-03-28 2003-09-02 キヤノン株式会社 インクジェット記録ヘッド及びインクジェット記録装置
JP3610279B2 (ja) * 2000-04-03 2005-01-12 キヤノン株式会社 記録ヘッドおよび該記録ヘッドを備えた記録装置
US6409298B1 (en) 2000-05-31 2002-06-25 Lexmark International, Inc. System and method for controlling current density in thermal printheads
JP2002370363A (ja) 2001-06-15 2002-12-24 Canon Inc インクジェット記録ヘッド用基板、インクジェット記録ヘッド、インクジェット記録装置
JP2003072076A (ja) * 2001-08-31 2003-03-12 Canon Inc 記録ヘッド及びその記録ヘッドを用いた記録装置
US7025894B2 (en) * 2001-10-16 2006-04-11 Hewlett-Packard Development Company, L.P. Fluid-ejection devices and a deposition method for layers thereof
US20040081689A1 (en) * 2002-10-24 2004-04-29 Dunfield John Stephen Pharmaceutical dosage form and method of making
US6786591B2 (en) * 2002-10-24 2004-09-07 Hewlett-Packard Development Company, L.P. Fluid ejector apparatus and methods
US7175248B2 (en) * 2004-02-27 2007-02-13 Hewlett-Packard Development Company, L.P. Fluid ejection device with feedback circuit
US7240981B2 (en) * 2004-02-27 2007-07-10 Hewlett-Packard Development Company, L.P. Wide array fluid ejection device
JP2006181717A (ja) * 2004-12-24 2006-07-13 Canon Inc 液体収納容器、該容器を用いる液体供給システムおよび記録装置、前記容器用回路モジュールおよび基板、並びに液体収納カートリッジ
US9283750B2 (en) * 2005-05-20 2016-03-15 Hewlett-Packard Development Company, L.P. Constant current mode firing circuit for thermal inkjet-printing nozzle
CN101062610A (zh) * 2006-04-26 2007-10-31 国际联合科技股份有限公司 喷墨印头控制电路
US7661782B2 (en) * 2007-04-19 2010-02-16 Lexmark International, Inc. Current control circuit for micro-fluid ejection device heaters
JP4995150B2 (ja) * 2007-06-26 2012-08-08 キヤノン株式会社 インクジェット記録ヘッド基板、インクジェット記録ヘッドおよびインクジェット記録装置
US9221056B2 (en) * 2007-08-29 2015-12-29 Canon U.S. Life Sciences, Inc. Microfluidic devices with integrated resistive heater electrodes including systems and methods for controlling and measuring the temperatures of such heater electrodes
US8306773B2 (en) 2007-08-29 2012-11-06 Canon U.S. Life Sciences, Inc. Microfluidic devices with integrated resistive heater electrodes including systems and methods for controlling and measuring the temperatures of such heater electrodes
US8380457B2 (en) * 2007-08-29 2013-02-19 Canon U.S. Life Sciences, Inc. Microfluidic devices with integrated resistive heater electrodes including systems and methods for controlling and measuring the temperatures of such heater electrodes
JP4905414B2 (ja) * 2008-06-04 2012-03-28 セイコーエプソン株式会社 液状体吐出装置、液状体の吐出方法および電気光学装置の製造方法
JP4561907B2 (ja) * 2008-08-25 2010-10-13 富士ゼロックス株式会社 容量性負荷の駆動回路及び液滴噴射装置
JP6376829B2 (ja) * 2014-05-09 2018-08-22 キヤノン株式会社 液体吐出用基板、液体吐出用ヘッド、および、記録装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345845A (en) * 1981-06-19 1982-08-24 International Business Machines Corporation Drive circuit for thermal printer
JPS5948169A (ja) * 1982-09-13 1984-03-19 Fuji Xerox Co Ltd サ−マルヘツド駆動制御装置
US4590484A (en) * 1983-01-13 1986-05-20 Ricoh Company, Ltd. Thermal recording head driving control system
JPS6013571A (ja) * 1983-07-04 1985-01-24 Sony Corp 印画装置
US4590488A (en) * 1985-05-28 1986-05-20 Astro-Med, Inc. Circuit for controlling energization of thermal print head
US4875056A (en) * 1986-01-17 1989-10-17 Canon Kabushiki Kaisha Thermal recording apparatus with variably controlled energization of the heating elements thereof
JPH0785937B2 (ja) * 1986-09-12 1995-09-20 三菱電機株式会社 ドライバｉｃ及び記録ヘッド
JPH0764072B2 (ja) * 1988-03-07 1995-07-12 ゼロックス コーポレーション バブル・インクジェット印字機構のシリコン集積回路チップ
US4947192A (en) * 1988-03-07 1990-08-07 Xerox Corporation Monolithic silicon integrated circuit chip for a thermal ink jet printer
US4887098A (en) * 1988-11-25 1989-12-12 Xerox Corporation Thermal ink jet printer having printhead transducers with multilevelinterconnections

Also Published As

Publication number Publication date
DE69214317D1 (de) 1996-11-14
EP0499373B1 (de) 1996-10-09
JP3217836B2 (ja) 2001-10-15
JPH0516366A (ja) 1993-01-26
US5083137A (en) 1992-01-21
DE69214317T2 (de) 1997-03-06
EP0499373A3 (de) 1992-08-26
EP0499373A2 (de) 1992-08-19

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20110124