EP0013918B1 - Schaltungsanordnung zur temperaturabhängigen Spannungsregelung für piezoelektrische Schreibdüsen in Tintenmosaikschreibeinrichtungen - Google Patents
Schaltungsanordnung zur temperaturabhängigen Spannungsregelung für piezoelektrische Schreibdüsen in Tintenmosaikschreibeinrichtungen Download PDFInfo
- Publication number
- EP0013918B1 EP0013918B1 EP80100141A EP80100141A EP0013918B1 EP 0013918 B1 EP0013918 B1 EP 0013918B1 EP 80100141 A EP80100141 A EP 80100141A EP 80100141 A EP80100141 A EP 80100141A EP 0013918 B1 EP0013918 B1 EP 0013918B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- circuit
- temperature
- control
- adjustable resistor
- 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
Links
Images
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
- B41J2/04553—Control methods or devices therefor, e.g. driver circuits, control circuits detecting ambient 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
- B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
-
- 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
- B41J2/07—Ink jet characterised by jet control
- B41J2/072—Ink jet characterised by jet control by thermal compensation
-
- 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
Definitions
- the invention relates to a circuit arrangement for temperature-dependent voltage regulation of the control voltages required for the operation of piezoelectric writing nozzles in ink mosaic writing devices with a control circuit assigned to each writing nozzle, in which a voltage converter circuit is provided, the secondary-side inductance of which forms an oscillating circuit together with the capacitance of the writing nozzle and which also has a voltage divider contains an adjustable resistor for setting the control voltage.
- Ink nozzles that use the piezoelectric principle are used in ink mosaic writing devices.
- tubular drive elements made of polarized ceramic containing writing fluid are used, the diameter of which narrows in the direction of the polarization voltage when an electrical voltage is applied, and widens against the polarity voltage when an electrical voltage is applied.
- a circuit arrangement for generating the voltages required to control the writing nozzles (DE-OS 2 548 691), with which the writing nozzles in the idle state are expanded by applying a voltage opposite to the polarity voltage, and this extended state is maintained for a defined time, and that for ejecting the ink droplet, the writing nozzle is brought from an expanded to a narrowed state by changing the polarity of a control voltage which causes the expanded state.
- the known circuit arrangement contains a voltage converter circuit whose inductance on the secondary side, in conjunction with the capacitance of the writing nozzle, forms an oscillating circuit damped by an attenuator.
- a device for adjusting the control voltage is provided, with which the primary current in the voltage converter circuit can be limited.
- This known control of the writing nozzles has the advantage that a very large stroke can be generated with relatively small changes in voltage on the ceramic tube of the writing nozzle.
- the control voltage for the writing nozzles can be set individually for each writing nozzle, which is particularly advantageous for ink mosaic writing devices in which the writing head each contains several writing nozzles. In this case, a separate control circuit is provided for each writing nozzle.
- the mode of operation of the writing nozzles necessary for normal and trouble-free operation depends not only on the supply with a very specific, individually adjustable control voltage; of equal importance is also the dependence on the viscosity of the writing fluid.
- the viscosity of the ink used as a writing fluid is now largely temperature-dependent. It changes even with slight changes in the ambient temperature.
- ink jet recorder in which ink is fed to a single nozzle under constant pressure and ejected from it in the form of ink droplets and then accelerated on the output side under the action of an electrostatic field generated between the nozzle and electrodes with the aid of a high-voltage generator, it has therefore already become known using a temperature sensor to record the ink temperature and to change the output voltage of the high-voltage generator as a function of this, in order to keep the temperature-dependent discharge frequency of the droplets at a constant value by means of the output voltage of the high-voltage generator, which also influences the discharge frequency, which also keeps the droplet size constant (DE-A-2 353 525).
- this arrangement is not suitable for ink mosaic writing devices with writing nozzles operating according to the piezoelectric principle, since here the ejection frequency is predetermined by the pulse frequency of the control voltage pulses driving the writing nozzles.
- the use of this known arrangement must be ruled out.
- the temperature compensation is carried out in such a way that either the charging or the deflection voltage of a downstream charging or deflection electrode is changed accordingly (US Pat. No. 3,971,039). A change in the control voltage pulses is not provided here.
- the object of the invention is to provide a control device with which the control voltage values for the individual piezoelectric writing nozzles of an ink mosaic writing device set at a predetermined temperature can be changed jointly depending on temperature changes.
- control circuits provided for generating the control voltages required for the individual writing nozzles can only be changed very slightly, but the principle of their mode of operation, in particular the possibility of individually setting the parameters for the required control voltages can be maintained, and that a change in the control voltages caused by temperature changes detects all control circuits together.
- each of the, for example, 12 writing nozzles 1 is assigned a control circuit 2, via which each writing nozzle is supplied with the control voltage required for it.
- the structure of a control circuit 2 is known per se.
- the pulses present at a pulse input 3 pass through a driver stage 4 for adaptation to the voltage conditions of the circuit arrangement to an amplifier stage 5, which is constructed from integrated transistors in a Darlington circuit.
- the amplifier stage 5 is followed by the primary winding of a voltage converter circuit 6, via which the writing nozzle 1 is decoupled from the amplifier stage 5.
- the secondary inductance of the voltage converter circuit 6 forms, together with the capacitance of the writing nozzle 1, an oscillating circuit which is damped on one side by the series connection of a resistor 7 with a diode 8.
- the voltage supply to the control circuit 2 takes place via the connections 9 and 10 of a common voltage supply.
- the operation of the control circuit 2 is as follows.
- the amplifier stage 5 becomes conductive through a pulse arriving via the pulse input 3, so that the primary winding of the voltage converter circuit 6 is flowed through by the current, which induces a voltage surge in the secondary winding.
- the resonant circuit formed from the secondary inductance of the voltage converter circuit 6 and the capacitance of the writing nozzle 1 is triggered. If the current is switched off at the end of the pulse, a voltage is induced in the opposite direction.
- the control circuit contains a device for adjusting the base voltage for the amplifier stage 5. This is done using a voltage divider circuit consisting of resistors 11 and 12 and a limiter diode 13. At the dividing point of the voltage divider circuit the base voltage for the amplifier circuit 5 can be set in such a way that a current limitation in the voltage converter circuit 6 is achieved in connection with the emitter resistor 14, whereby a simple adaptation to the individual voltage requirement of the writing nozzle 1 is possible.
- the adjustable resistors of the voltage divider are each connected to a constant voltage.
- the controllable resistors 12 of the voltage dividers of all control circuits 2 are jointly connected to the output 15 of a control circuit 16, which supplies an output voltage which is dependent on the ambient temperature.
- the control circuit 16 contains a temperature-dependent resistor 20, which is preferably a thermistor, and as a control device an operational amplifier 24 with a downstream transistor 25.
- the non-inverting input of the operational amplifier 24 is connected to a first voltage divider 17, 18, 19, which also has the temperature-dependent resistor 20 contains.
- the inverting input of the operational amplifier 24 is connected to a second voltage divider 21, 22.
- negative feedback is provided via an adjustable resistor 26 bridged by a diode 27.
- the mode of operation of the arrangement according to the invention is as follows.
- the control device 24 and 25 is set in such a way that at room temperature at the output 15 of the control circuit 16 a sufficient voltage for operating the writing nozzles is emitted.
- the individual target voltages for the individual writing nozzles 1 are then set via the adjustable resistors 12.
- the resistance value of the temperature-dependent resistor 20 and thus the output voltage of the control circuit 16 also change. This is available via the controllable resistors 12 to the inputs of the control circuits 2 connected in parallel and leads to the control voltages for the individual writing nozzles 1 being proportional the change in the output voltage at output 15 can be changed.
- the adjustable resistor 26 is provided in the negative feedback branch of the control device 24 and 25.
- the voltage present at the non-inverting input of the operational amplifier 24 is set via the adjustable resistor 18 of the first voltage divider in such a way that the voltage at the inverting input of the operational amplifier 24 corresponds to the output voltage at output 15 at room temperature.
- controllable resistor 26 arranged in the negative feedback branch is bridged by a diode 27, which becomes conductive at high temperatures and thus at a low control voltage and amplifies the negative feedback. This reduces the control steepness at high temperatures and the control steepness set via the adjustable resistor 26 is only fully effective at low temperatures.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2903339A DE2903339B2 (de) | 1979-01-29 | 1979-01-29 | Schaltungsanordnung zur temperaturabhängigen Spannungsregelung für piezoelektrische Schreibdüsen in Tintenmosaikschreibeinrichtungen |
DE2903339 | 1979-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0013918A1 EP0013918A1 (de) | 1980-08-06 |
EP0013918B1 true EP0013918B1 (de) | 1983-07-20 |
Family
ID=6061646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80100141A Expired EP0013918B1 (de) | 1979-01-29 | 1980-01-11 | Schaltungsanordnung zur temperaturabhängigen Spannungsregelung für piezoelektrische Schreibdüsen in Tintenmosaikschreibeinrichtungen |
Country Status (8)
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5660261A (en) * | 1979-10-23 | 1981-05-25 | Canon Inc | Ink-jet printer |
JPS5686768A (en) * | 1979-12-18 | 1981-07-14 | Ricoh Co Ltd | Electric charge quantity control method in ink jet printing |
JPS56136373A (en) * | 1980-03-29 | 1981-10-24 | Sharp Corp | Temperature corrector for ink jet recording head |
JPS57118838U (US07754267-20100713-C00017.png) * | 1981-01-16 | 1982-07-23 | ||
JPS58208064A (ja) * | 1982-05-29 | 1983-12-03 | Fujitsu Ltd | インクジエツト記録装置の駆動回路 |
JPS58215370A (ja) * | 1982-06-10 | 1983-12-14 | Seiko Epson Corp | インク式ワイヤドツトプリンタ |
IT1155548B (it) * | 1982-07-16 | 1987-01-28 | Olivetti & Co Spa | Sistema di pilotaggio di un elemento scrivente a getto selettivo d inchiostro |
JPH062411B2 (ja) * | 1983-04-22 | 1994-01-12 | キヤノン株式会社 | 液体噴射記録装置 |
JPS60174654A (ja) * | 1984-02-20 | 1985-09-07 | Matsushita Electric Ind Co Ltd | インクジエツト記録装置 |
US4560998A (en) * | 1984-07-18 | 1985-12-24 | Tektronix, Inc. | Low voltage transformer coupled ink jet driver |
GB2210586B (en) * | 1984-12-21 | 1990-04-04 | Canon Kk | Liquid-discharge recording apparatus |
US5302971A (en) * | 1984-12-28 | 1994-04-12 | Canon Kabushiki Kaisha | Liquid discharge recording apparatus and method for maintaining proper ink viscosity by deactivating heating during capping and for preventing overheating by having plural heating modes |
GB2208829B (en) * | 1984-12-28 | 1989-10-18 | Canon Kk | Liquid-discharge recording apparatus |
US5172142A (en) * | 1985-04-15 | 1992-12-15 | Canon Kabushiki Kaisha | Ink jet recording apparatus with driving means providing a driving signal having upper and lower limits in response to an input signal |
DE3612469C2 (de) * | 1985-04-15 | 1999-02-18 | Canon Kk | Tintenstrahl-Aufzeichnungsgerät |
US5905511A (en) * | 1985-04-15 | 1999-05-18 | Canon Kabushiki Kaisha | Ink jet recording apparatus for accurately recording regardless of ambient temperature |
JP2612259B2 (ja) * | 1986-08-25 | 1997-05-21 | キヤノン株式会社 | 画像記録装置および画像記録方法 |
JPS63153148A (ja) * | 1986-12-17 | 1988-06-25 | Canon Inc | 液体噴射記録方法 |
US4866326A (en) * | 1987-02-19 | 1989-09-12 | Brother Kogyo Kabushiki Kaisha | Driver circuit for piezoelectric actuator, and impact dot-matrix printer using the driver circuit |
US4812673A (en) * | 1987-07-17 | 1989-03-14 | Burlington Industries, Inc. | Print pulse control circuit for electrostatic fluid jet applicator |
JP2831653B2 (ja) * | 1988-06-15 | 1998-12-02 | キヤノン株式会社 | インクジェット記録装置 |
EP0401216B1 (de) * | 1988-06-29 | 1993-04-28 | Siemens Aktiengesellschaft | Heizvorrichtung zur erwärmung der tinte im schreibkopf einer tintendruckeinrichtung |
DE68918831T2 (de) * | 1988-12-29 | 1995-03-02 | Canon Kk | Flüssigkeitsstrahlaufzeichnungsvorrichtung. |
US5130726A (en) * | 1989-02-28 | 1992-07-14 | Canon Kabushiki Kaisha | Ink jet recording apparatus |
US5212497A (en) * | 1991-06-17 | 1993-05-18 | Tektronix, Inc. | Array jet velocity normalization |
US5381930A (en) * | 1992-01-15 | 1995-01-17 | Kalabakas; Peter | Dispensing device for a measured volume of liquid |
US5300968A (en) * | 1992-09-10 | 1994-04-05 | Xerox Corporation | Apparatus for stabilizing thermal ink jet printer spot size |
US5668579A (en) * | 1993-06-16 | 1997-09-16 | Seiko Epson Corporation | Apparatus for and a method of driving an ink jet head having an electrostatic actuator |
DE69412917T2 (de) * | 1993-06-16 | 1999-04-01 | Seiko Epson Corp | Tintenstrahlaufzeichnungsgerät mit elektrostatischem Betätiger und Verfahren zu seiner Steuerung |
DE69412915T2 (de) * | 1993-06-16 | 1999-04-01 | Seiko Epson Corp | Tintenstrahlaufzeichnungsgerät |
US5519417A (en) * | 1994-03-31 | 1996-05-21 | Xerox Corporation | Power control system for a printer |
DE29504576U1 (de) * | 1995-03-07 | 1995-05-11 | Francotyp-Postalia GmbH, 16547 Birkenwerder | Druckkopfthermosteuerung |
JP3763200B2 (ja) * | 1997-02-17 | 2006-04-05 | セイコーエプソン株式会社 | インクジェット式記録装置 |
JP2001521842A (ja) * | 1997-10-30 | 2001-11-13 | グザルゼット エービー | インクジェットプリンター |
JP4289401B2 (ja) | 2007-01-17 | 2009-07-01 | ブラザー工業株式会社 | インクジェット記録装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946398A (en) * | 1970-06-29 | 1976-03-23 | Silonics, Inc. | Method and apparatus for recording with writing fluids and drop projection means therefor |
US3787882A (en) * | 1972-09-25 | 1974-01-22 | Ibm | Servo control of ink jet pump |
JPS5642026B2 (US07754267-20100713-C00017.png) * | 1972-10-27 | 1981-10-01 | ||
JPS555429B2 (US07754267-20100713-C00017.png) * | 1973-09-26 | 1980-02-06 | ||
JPS5242652B2 (US07754267-20100713-C00017.png) * | 1973-11-24 | 1977-10-26 | ||
DE2433510B2 (de) * | 1974-07-12 | 1979-03-22 | Olympia Werke Ag, 2940 Wilhelmshaven | Tintenversorgungssystem für einen Tintenspritz-Drucker |
CA1012198A (en) * | 1974-07-19 | 1977-06-14 | Stephan B. Sears | Method and apparatus for recording with writing fluids and drop projection means therefor |
DE2548691C3 (de) * | 1975-10-30 | 1986-04-17 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum Ansteuern von Schreibdüsen in Tintenmosaikschreibeinrichtungen |
DE2613204B2 (de) * | 1976-03-27 | 1978-11-30 | Olympia Werke Ag, 2940 Wilhelmshaven | Vorrichtung zur Erzeugung dosierter Mengen einer Flüssigkeit |
DE2659398A1 (de) * | 1976-12-29 | 1978-07-06 | Siemens Ag | Heizvorrichtung fuer schreibkoepfe in tintenmosaikschreibeinrichtungen |
JPS5829740B2 (ja) * | 1977-06-06 | 1983-06-24 | 株式会社リコー | カラ−インクジエツト記録装置 |
US4125845A (en) * | 1977-08-25 | 1978-11-14 | Silonics, Inc. | Ink jet print head pressure and temperature control circuits |
-
1979
- 1979-01-29 DE DE2903339A patent/DE2903339B2/de active Granted
- 1979-12-26 US US06/106,841 patent/US4275402A/en not_active Expired - Lifetime
-
1980
- 1980-01-11 EP EP80100141A patent/EP0013918B1/de not_active Expired
- 1980-01-25 AU AU54977/80A patent/AU525216B2/en not_active Ceased
- 1980-01-25 MX MX180950A patent/MX148250A/es unknown
- 1980-01-25 CA CA344,446A patent/CA1129479A/en not_active Expired
- 1980-01-28 ZA ZA00800476A patent/ZA80476B/xx unknown
- 1980-01-29 JP JP55009237A patent/JPS6058700B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6058700B2 (ja) | 1985-12-21 |
US4275402A (en) | 1981-06-23 |
DE2903339A1 (de) | 1980-07-31 |
MX148250A (es) | 1983-03-30 |
DE2903339B2 (de) | 1980-11-13 |
AU5497780A (en) | 1980-08-07 |
JPS55101473A (en) | 1980-08-02 |
CA1129479A (en) | 1982-08-10 |
ZA80476B (en) | 1981-03-25 |
EP0013918A1 (de) | 1980-08-06 |
AU525216B2 (en) | 1982-10-28 |
DE2903339C3 (US07754267-20100713-C00017.png) | 1987-06-19 |
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