EP0865921A2 - Circuit de commande pour élément piézoélectrique et appareil d'enregistrement à jet d'encre - Google Patents

Circuit de commande pour élément piézoélectrique et appareil d'enregistrement à jet d'encre Download PDF

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Publication number
EP0865921A2
EP0865921A2 EP97305778A EP97305778A EP0865921A2 EP 0865921 A2 EP0865921 A2 EP 0865921A2 EP 97305778 A EP97305778 A EP 97305778A EP 97305778 A EP97305778 A EP 97305778A EP 0865921 A2 EP0865921 A2 EP 0865921A2
Authority
EP
European Patent Office
Prior art keywords
piezoelectric element
piezoelectric
piezoelectric elements
element group
ink jet
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.)
Withdrawn
Application number
EP97305778A
Other languages
German (de)
English (en)
Other versions
EP0865921A3 (fr
Inventor
Shigeyoshi Nakamura
Jun Moroo
Hiroshi Nou
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0865921A2 publication Critical patent/EP0865921A2/fr
Publication of EP0865921A3 publication Critical patent/EP0865921A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—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
    • B41J2/0452—Control methods or devices therefor, e.g. driver circuits, control circuits reducing demand in current or voltage
    • 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
    • B41J2/04581—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
    • B41J2/015—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
    • B41J2/04588—Control methods or devices therefor, e.g. driver circuits, control circuits using a specific waveform

Definitions

  • the present invention generally relates to piezoelectric element driving circuits and ink jet recording apparatuses, and more particularly to a piezoelectric element driving circuit for driving a piezoelectric element which is used as a pressure applying means of a recording head and to an ink jet recording apparatus having such a piezoelectric element driving circuit.
  • Ink jet recording apparatus can roughly be categorized into a first type having a first recording head which uses a piezoelectric element as a pressure applying means with respect to the ink so as to realize the ink jet, and a second type having a second recording head which uses a heating element to generate bubbles in the ink so as to realize the ink jet.
  • the first recording head is constructed to realize the ink jet by mechanically deforming an ink chamber by the piezoelectric element, and for this reason, it is possible to control with relative ease the size of the ink drop by a driving signal waveform applied to the piezoelectric element.
  • FIG.1 is a circuit diagram showing an example of a conventional piezoelectric element driving circuit which drives the piezoelectric element of the ink jet recording apparatus. Since the piezoelectric element appears as a capacitor in the circuit, the piezoelectric element is shown as a capacitor in FIG.1.
  • the piezoelectric element driving circuit shown in FIG.1 includes transistors 101 and 102 provided between a power supply voltage Vcc and ground, diodes 103 and 105, and resistors 104 and 106, and is connected as shown with respect to a piezoelectric element (capacitor) 107.
  • the diode 103 and the resistor 104, and the diode 105 and the resistor 106 respectively determine charging and discharging time constants of the piezoelectric element 107.
  • the piezoelectric element 107 is driven by applying pulse signals to the transistors 101 and 102.
  • the piezoelectric element driving circuit shown in FIG.1 is provided with respect to each piezoelectric element. For this reason, the number of switching elements (transistors) within the piezoelectric element driving circuit increases depending on the number of piezoelectric elements, thereby making the piezoelectric element driving circuit complex and expensive.
  • FIG.2 is a circuit diagram showing another example of the conventional piezoelectric element driving circuit which drives the piezoelectric elements of the ink jet recording apparatus.
  • the piezoelectric element driving circuit is constructed to drive a plurality of piezoelectric elements.
  • the piezoelectric element driving circuit shown in FIG.2 includes transistors 108 and 109 provided between a power supply voltage Vcc and ground, and a plurality of switch circuits 111-1 through 111-n provided with respect to a plurality of piezoelectric elements (capacitors) 107-1 through 107-n. Common electrodes of the piezoelectric elements 107-1 through 107-n are connected in common to a node which connects the transistors 108 and 109, and independent electrodes of the piezoelectric elements 107-1 through 107-n are grounded via corresponding switch circuits 111-1 through 111-n.
  • Each of the switch circuits 111-1 through 111-n includes a transistor Tr and a diode D. Each of the switch circuits 111-1 through 111-n is turned ON in response to a signal which is applied to the corresponding transistor Tr, so as to ground and enable driving of the corresponding one of the piezoelectric elements 107-1 through 107-n.
  • the increase in the number of switching elements (transistors) within the piezoelectric element driving circuit depending on the number of piezoelectric elements is slightly reduced compared to the piezoelectric element driving circuit shown in FIG.1 which requires a number of switching elements which increases considerably depending on the number of piezoelectric elements.
  • the piezoelectric element appears as a capacitor.
  • a divided signal voltage would be applied to each of the piezoelectric elements.
  • the piezoelectric element which originally should not be driven would be driven by the applied divided signal voltage, and there is a possibility of this piezoelectric element making the ink jet. Therefore, in order to prevent erroneous operations of the piezoelectric elements, the piezoelectric elements cannot be connected in the matrix arrangement.
  • the conventional piezoelectric element driving circuit requires at least one switching element with respect to each piezoelectric element, and there were problems in that the piezoelectric element driving circuit becomes complex and expensive. Furthermore, there was another problem in that the power consumption of the piezoelectric element driving circuit increases due to the increase in the number of switching elements.
  • Another object of the present invention is to provide a piezoelectric element driving circuit for driving a plurality of piezoelectric elements having common electrodes and independent electrodes which are driven independently, said piezoelectric element driving circuit comprising a first switch circuit enabling each of a plurality of piezoelectric elements of a first piezoelectric element group having the common electrodes coupled in common in response to a first enable signal, a second switch circuit enabling each of a plurality of piezoelectric elements of a second piezoelectric element group in response to a second enable signal, said piezoelectric elements of the second piezoelectric element group being different from the piezoelectric elements of the first piezoelectric element group, and a driving circuit part driving in common the independent electrodes of the corresponding piezoelectric elements of the first and second piezoelectric element groups based on recording data.
  • the piezoelectric element driving circuit of the present invention it is possible to drive a plurality of piezoelectric elements at a low power consumption using a simple and inexpensive circuit construction.
  • Still another object of the present invention is to provide an ink jet recording apparatus for carrying out an ink jet recording by applying pressure on an ink by piezoelectric elements having common electrodes and independent electrodes which are driven independently, said ink jet recording apparatus comprising a first piezoelectric element group including a plurality of piezoelectric elements having common electrodes which are coupled in common and enabled in response to a first enable signal, a second piezoelectric element group including a plurality of piezoelectric elements having common electrodes which are coupled in common and enabled in response to a second enable signal, said piezoelectric elements of said second piezoelectric element group being different from the piezoelectric elements of said first piezoelectric element group, and driving means for driving in common independent electrodes of the corresponding piezoelectric elements of said first and second piezoelectric element groups based on recording data.
  • the ink jet recording apparatus of the present invention it is possible to drive a plurality of piezoelectric elements of the ink jet recording apparatus at a low power consumption using a simple and inexpensive
  • a piezoelectric element driving circuit is provided with a first switch circuit which enables each of a plurality of piezoelectric elements of a first piezoelectric element group having common electrodes coupled in common in response to a first enable signal, a second switch circuit which enables each of a plurality of piezoelectric elements of a second piezoelectric element group in response to a second enable signal, where the piezoelectric elements of the second piezoelectric element group are different from the piezoelectric elements of the first piezoelectric element group, and a driving circuit part which drives in common independent electrodes of the corresponding piezoelectric elements of the first and second piezoelectric element groups based on recording data.
  • the piezoelectric element driving circuit of the present invention only one of the corresponding piezoelectric elements of the first and second piezoelectric element groups is driven at each point in time. For this reason, it is possible to greatly reduce the number of switching elements that are required to positively drive only the selected piezoelectric element, and the power consumption is thereby reduced.
  • An ink jet recording apparatus carries out an ink jet recording by applying pressure on an ink by piezoelectric elements having common electrodes and independent electrodes which are driven independently.
  • the ink jet recording apparatus is provided with a first piezoelectric element group which includes a plurality of piezoelectric elements having common electrodes which are coupled in common and enabled in response to a first enable signal, a second piezoelectric element group which includes a plurality of piezoelectric elements having common electrodes which are coupled in common and enabled in response to a second enable signal, where the piezoelectric elements of the second piezoelectric element group are different from the piezoelectric elements of the first piezoelectric element group, and a driving means for driving in common independent electrodes of the corresponding piezoelectric elements of the first and second piezoelectric element groups based on recording data.
  • the ink jet recording apparatus of the present invention only one of the corresponding piezoelectric elements of the first and second piezoelectric element groups is driven at each point in time. For this reason, it is possible to greatly reduce the number of switching elements that are required to positively drive only the selected piezoelectric element, and the power consumption is thereby reduced. In addition, it is possible to realize a high-speed ink jet recording because a large number of piezoelectric elements can be selectively driven in this manner.
  • FIG.3 is a system block diagram showing a part of a first embodiment of the ink jet recording apparatus according to the present invention.
  • This first embodiment of the ink jet recording apparatus employs a first embodiment of the piezoelectric element driving circuit according to the present invention.
  • the present invention is applied to a color ink jet printer.
  • An ink jet printer generally includes a central processing unit (CPU) 1, a RAM 2, a ROM 3, a host interface 4, a mechanical interface 5, a head interface 6, a bus 7, a sensor group 11, a mechanical driver 12, a motor group 13, a head driver 14, and a recording head 15 which are connected as shown in FIG.3.
  • CPU central processing unit
  • RAM random access memory
  • ROM read-only memory
  • host interface 4 a mechanical interface 5
  • head interface 6 a bus 7
  • sensor group 11 a mechanical driver 12
  • motor group 13 a motor group 13
  • a head driver 14 and a recording head 15 which are connected as shown in FIG.3.
  • the CPU 1 controls the operation of the entire ink jet printer.
  • the ROM 3 stores data and programs to be executed by the CPU 1.
  • the RAM 2 stores intermediate data of computation processes carried out by the CPU 1 and the like.
  • the CPU 1 is coupled to a host unit (not shown) via the bus 7 and the host interface 4.
  • the host interface 4 supplies commands, recording data and the like from the host unit to the CPU 1, and also supplies information related to the operation mode or the like from the CPU 1 to the host unit.
  • the mechanical interface 5 notifies to the CPU 1 detection signals from the sensor group 11 which includes various sensors such as a sensor which detects the size of the recording paper used.
  • the mechanical interface 5 supplies to the mechanical driver 12 information for controlling the mechanical driver 12 based on an instruction from the CPU 1.
  • the mechanical driver 12 controls the motor group 13 based on the information from the mechanical interface 5, where the motor group 13 includes various motors for driving mechanisms such as a paper supply mechanism, a paper eject mechanism and head feed mechanism.
  • the head interface 6 controls the head driver 14 based on an instruction from the CPU 1, and controls nozzles which are to eject the ink out of the nozzles of the recording head 15 and to control an amount of the ink ejected from each of the nozzles.
  • the recording head 15 has a known construction including a plurality of nozzles which eject a black ink that is used when making a single-color recording, a plurality of nozzles which eject yellow ink, magenta ink, cyan ink and black ink that are used when making a multi-color recording, and piezoelectric elements which are provided with respect to each of the nozzles.
  • the CPU 1 When making the single-color recording, the CPU 1 supplies a first enable signal which controls the plurality of nozzles which eject the black ink that is used when making the single-color recording to an enabled state to the head driver 14 via the head interface 6. On the other hand, when making the multi-color recording, the CPU 1 supplies a second enable signal which controls the plurality of nozzles which eject the yellow ink, magenta ink, cyan ink and black ink that are used when making the multi-color recording to an enabled state to the header driver 14 via the head interface 6.
  • the number of nozzles used when making the single-color recording is larger than the number of nozzles used when making the multi-color recording.
  • the CPU 1 notifies the host unit via the host interface 4 that the ink jet printer is in a ready state possible to carry out a recording operation.
  • the host unit receives a record instruction from an application program, the host unit issues commands related to the recording resolution, the image processing and the like with respect to the CPU 1 after confirming that the ink jet printer is in the ready state, and also transfer the recording data to the CPU 1 via the host interface 4.
  • the CPU 1 sets various parameters in the mechanical interface 5 and the head interface 6 depending on the instructions of the commands from the host unit. In this state, the CPU 1 also sets in the head interface 6 a flag which indicates whether the recording data are to be recorded by the single-color recording or the multi-color recording, depending on the command from the host unit.
  • the header interface 6 supplies the first enable signal to the head driver 14 depending on this flag when making the single-color recording, and supplies the second enable signal to the head driver 14 depending on this flag when making the multi-color recording.
  • the recording data are supplied to the head driver 14 via the head interface 6 under the control of the CPU 1. Based on the recording data and the first or second enable signal, the head driver 14 supplies to the recording head 15 a head driving voltage for driving each piezoelectric element corresponding to the nozzle which is to eject the ink.
  • This embodiment is particularly characterized by the constructions of the head driver 14 and the recording head 15, and it is possible to use parts having known constructions with respect to other parts of the ink jet printer shown in FIG.3. For this reason, in the following description, a description will be given of the constructions and operations of the head driver 14 and the recording head 15 in particular.
  • FIG.4 is a circuit diagram showing an embodiment of the construction of a part of the head driver 14 and the recording head 15.
  • the head driver 14 includes waveform generators 21 through 23, a first switch circuit 25, and a second switch circuit 26.
  • the first switch circuit 25 is made up of a transistor Tr1 and a diode D1
  • the second switch circuit 26 is made up of a transistor Tr2 and a diode D2.
  • An enable signal EN1 from the CPU 1 is supplied to the first switch circuit 25, and an enable signal EN2 from the CPU 1 is supplied to the second switch circuit 26.
  • the recording head 15 includes a shift register 31, a latch circuit 32, switches 33-1 through 33-n, a plurality of piezoelectric elements 34-1 through 34-n forming a first piezoelectric element group 34, and a plurality of piezoelectric elements 35-1 through 35-n forming a second piezoelectric element group 35.
  • the piezoelectric elements 34-1 through 34-n of the first piezoelectric element group 34 are used when making the single-color recording.
  • m > n other piezoelectric elements 34-n+1 through 34-m the illustration of which are omitted in FIG.4 are actually also used when making the single-color recording.
  • the piezoelectric elements 35-1 through 35-n of the second piezoelectric element group 35 are used when making the multi-color recording.
  • Independent electrodes of the piezoelectric elements 34-1 through 34-n of the first piezoelectric element group 34 are connected to output terminals of the corresponding switches 33-1 through 33-n.
  • independent electrodes of the piezoelectric elements 35-1 through 35-n of the second piezoelectric element group 35 are connected to the output terminals of the corresponding switches 33-1 through 33-n.
  • common electrodes of the piezoelectric elements 34-1 through 34-n of the first piezoelectric element group 34 are connected in common to the first switch circuit 35.
  • common electrodes of the piezoelectric elements 35-1 through 35-n of the second piezoelectric element group 35 are connected in common to the second switch circuit 26.
  • the enable signal EN1 when the enable signal EN1 is active (has a high level), the common electrodes of the piezoelectric elements 34-1 through 34-n of the first piezoelectric element group 34 are grounded in common via the first switch circuit 25.
  • the enable signal EN2 when the enable signal EN2 is active (has a high level), the common electrodes of the piezoelectric elements 35-1 through 35-n of the second piezoelectric element group 35 are grounded in common via the second switch circuit 26.
  • the waveform generator 21 generates a head driving voltage having a waveform w1 shown in FIG.5 based on waveform data obtained from the CPU 1, and supplies this head driving voltage waveform w1 to each of the switches 33-1 through 33-n.
  • the waveform generator 22 generates a head driving voltage having a waveform w2 shown in FIG.5 based on waveform data obtained from the CPU 1, and supplies this head driving voltage waveform w2 to each of the switches 33-1 through 33-n.
  • the waveform generator 23 generates a head driving voltage having a waveform w3 shown in FIG.5 based on waveform data obtained from the CPU 1, and supplies this head driving voltage waveform w3 to each of the switches 33-1 through 33-n.
  • the ink jet quantity from the recording head 15 is largest responsive to the waveform w1, second largest in response to the waveform w2, and smallest in response to the waveform w3.
  • the number of waveform generators used and the number of head driving voltage waveforms supplied to each of the switches 33-1 through 33-n are not limited to three, and the head driving voltage waveforms are not limited to the waveforms w1 through w3 described above.
  • the recording data from the host unit that are obtained via the host interface 4 and the CPU 1 are input to the shift register 31 in response to a clock from the CPU 1.
  • the recording data input to the shift register 31 are latched by the latch circuit 32 in response to a latch signal from the CPU 1.
  • An output signal of the latch circuit 32 is supplied to each of the switches 33-1 through 33-n as a control signal.
  • one of the driving voltage waveforms w1 through w3 received from the waveform generators 21 through 23 depending on the recording data is selectively output based on the control signal from the latch circuit 32.
  • the enable signal EN1 when driving the piezoelectric elements 34-2 and 34-n of the first piezoelectric element group 34, the enable signal EN1 is active, and the common electrodes of each of the piezoelectric elements 34-1 through 34-n of the first piezoelectric element group 34 are grounded in common via the first switch circuit 25.
  • the enable signal EN2 is inactive, and the common electrodes of each of the piezoelectric elements 35-1 through 35-n of the second piezoelectric element group 35 assume a floating state in common.
  • the head driving voltages applied to the independent electrodes of the piezoelectric elements 34-2 and 34-n have the same rising waveform, and thus, no voltage is applied to the independent electrodes of the piezoelectric elements 35-2 and 35-n.
  • this slight potential difference is divided into a voltage which is 1/2 the slight potential difference at the maximum or less.
  • FIG.3 The system block diagram of a part of this second embodiment of the ink jet recording apparatus is the same as that shown in FIG.3, and an illustration thereof will be omitted.
  • This second embodiment of the ink jet recording apparatus employs a second embodiment of the piezoelectric element driving circuit according to the present invention.
  • the present invention is applied to a color ink jet printer.
  • FIG.6 is a circuit diagram showing an embodiment of the construction of a part of the head driver 14 and the recording head 15 in this second embodiment of the ink jet recording apparatus.
  • those parts which are the same as those corresponding parts in FIG.4 are designated by the same reference numerals, and a description thereof will be omitted.
  • the first piezoelectric element group 34 includes a first sub group made up of piezoelectric elements 34-11 through 34-1p, a second sub group made up of piezoelectric elements 34-21 through 34-2p, ..., and an n-th sub group made up of piezoelectric elements 34-n1 through 34-np.
  • Independent electrodes of the p piezoelectric elements in each of the sub groups are connected to the output terminal of a corresponding one of the switches 33-1 through 33-n. Accordingly, in the case of the first sub group made up of the piezoelectric elements 34-11 through 34-1p, for example, each of the piezoelectric elements 34-11 through 34-1p are connected to the output terminal of the corresponding switch 33-1.
  • Common electrodes of the piezoelectric elements 34-11 through 34-1p of the first sub group are connected in common to a first switch circuit 25-1 which receives an enable signal EN11 from the CPU 1.
  • Common electrodes of the piezoelectric elements 34-21 through 34-2p of the second sub group are connected in common to a first switch circuit 25-2 which receives an enable signal EN12 from the CPU 1.
  • the enable signals EN11 through EN1n which are supplied to the first switch circuits 25-1 through 25-n become active time-divisionally.
  • the first piezoelectric element group 34 is used for the single-color recording
  • the second piezoelectric element group 35 is used for the multi-color recording.
  • the direction of the distortion which is utilized may be the same as the direction of the electric field or, may be perpendicular to the direction of the electric field, and it is possible to cope with either case using similar circuits.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP97305778A 1997-03-18 1997-07-31 Circuit de commande pour élément piézoélectrique et appareil d'enregistrement à jet d'encre Withdrawn EP0865921A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP65116/97 1997-03-18
JP9065116A JPH10250074A (ja) 1997-03-18 1997-03-18 圧電素子駆動回路及びインクジェット記録装置
JP6511697 1997-03-18

Publications (2)

Publication Number Publication Date
EP0865921A2 true EP0865921A2 (fr) 1998-09-23
EP0865921A3 EP0865921A3 (fr) 1999-08-11

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EP97305778A Withdrawn EP0865921A3 (fr) 1997-03-18 1997-07-31 Circuit de commande pour élément piézoélectrique et appareil d'enregistrement à jet d'encre

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EP (1) EP0865921A3 (fr)
JP (1) JPH10250074A (fr)
CN (1) CN1210787A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19927087A1 (de) * 1999-06-15 2000-12-21 Bosch Gmbh Robert Vorrichtung zum Laden und Entladen mehrerer piezoelektrischer Elemente
CN100408339C (zh) * 2004-09-02 2008-08-06 财团法人工业技术研究院 喷墨头结构及其制造方法和操作方法
JP4797550B2 (ja) * 2005-10-05 2011-10-19 富士ゼロックス株式会社 液滴吐出装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212958A (ja) * 1982-06-07 1983-12-10 Fujitsu Ltd インクジエツト用印字ヘツドの駆動回路
US4463359A (en) * 1979-04-02 1984-07-31 Canon Kabushiki Kaisha Droplet generating method and apparatus thereof
JPH0477260A (ja) * 1990-07-18 1992-03-11 Seiko Epson Corp インクジェットプリンタの駆動回路
JPH05116283A (ja) * 1991-10-25 1993-05-14 Fuji Electric Co Ltd インクジエツト記録ヘツド
JPH06286130A (ja) * 1993-03-31 1994-10-11 Seikosha Co Ltd インクジェットプリンタ
EP0737586A1 (fr) * 1995-04-14 1996-10-16 Seiko Epson Corporation Appareil d'enregistrement à jet d'encre et procédé pour l'impression à jet d'encre
JPH08300652A (ja) * 1995-01-13 1996-11-19 Mita Ind Co Ltd インクジェットヘッド駆動装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5781203A (en) * 1995-01-13 1998-07-14 Mita Industrial Co., Ltd. Ink ejecting device for use in an ink jet printing apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463359A (en) * 1979-04-02 1984-07-31 Canon Kabushiki Kaisha Droplet generating method and apparatus thereof
JPS58212958A (ja) * 1982-06-07 1983-12-10 Fujitsu Ltd インクジエツト用印字ヘツドの駆動回路
JPH0477260A (ja) * 1990-07-18 1992-03-11 Seiko Epson Corp インクジェットプリンタの駆動回路
JPH05116283A (ja) * 1991-10-25 1993-05-14 Fuji Electric Co Ltd インクジエツト記録ヘツド
JPH06286130A (ja) * 1993-03-31 1994-10-11 Seikosha Co Ltd インクジェットプリンタ
JPH08300652A (ja) * 1995-01-13 1996-11-19 Mita Ind Co Ltd インクジェットヘッド駆動装置
EP0737586A1 (fr) * 1995-04-14 1996-10-16 Seiko Epson Corporation Appareil d'enregistrement à jet d'encre et procédé pour l'impression à jet d'encre

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 064 (M-285), 27 March 1984 & JP 58 212958 A (FUJITSU KK), 10 December 1983 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 290 (M-1272), 26 June 1992 & JP 04 077260 A (SEIKO EPSON CORP), 11 March 1992 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 483 (M-1472), 2 September 1993 & JP 05 116283 A (FUJI ELECTRIC CO LTD), 14 May 1993 *
PATENT ABSTRACTS OF JAPAN vol. 095, no. 001, 28 February 1995 & JP 06 286130 A (SEIKOSHA CO LTD), 11 October 1994 *

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CN1210787A (zh) 1999-03-17
JPH10250074A (ja) 1998-09-22
EP0865921A3 (fr) 1999-08-11

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