JPS6226913B2 - - Google Patents
Info
- Publication number
- JPS6226913B2 JPS6226913B2 JP16375178A JP16375178A JPS6226913B2 JP S6226913 B2 JPS6226913 B2 JP S6226913B2 JP 16375178 A JP16375178 A JP 16375178A JP 16375178 A JP16375178 A JP 16375178A JP S6226913 B2 JPS6226913 B2 JP S6226913B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- capacitor
- piezoelectric element
- power supply
- switching
- 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
- 239000003990 capacitor Substances 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- B41J2/0452—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
Description
【発明の詳細な説明】
本発明はインクジエツト記録ヘツドの駆動回路
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive circuit for an inkjet recording head.
従来の方法を第１図に従つて説明する。 A conventional method will be explained with reference to FIG.
圧電素子３―１，……，３―ｎ（ｎは１以上の
数、以下全文にわたり共通）は記録信号６に応じ
てスイツチング動作をするスイツチング素子１―
１，……，１―ｎに接続されスイツチング素子１
―１，……，１―ｎをオンすることによつて圧電
素子３―１，……，３―ｎが充電され、充電され
た圧電素子に対応するインクノズルよりインクを
吐出させる。なお、圧電素子は一種の容量負荷で
あり、充電により素子に歪が生じ圧力を発生させ
る。スイツチング素子１―１，……，１―ｎは必
要期間オンされた後オフされる。圧電素子３―
１，……，３―ｎに蓄積された電荷はスイツチン
グ素子１―１，……，１―ｎが全てオフされた以
降リセツト信号７によりスイツチング素子４をオ
ンさせ放電抵抗５を介して放電される。 The piezoelectric elements 3-1, ..., 3-n (n is a number of 1 or more, common throughout the text below) are switching elements 1- that perform switching operations in response to the recording signal 6.
Switching element 1 connected to 1,...,1-n
By turning on the piezoelectric elements 3-1, . . . , 1-n, the piezoelectric elements 3-1, . Note that the piezoelectric element is a type of capacitive load, and charging causes strain in the element and generates pressure. The switching elements 1-1, . . . , 1-n are turned on for a necessary period and then turned off. Piezoelectric element 3-
After all of the switching elements 1-1, . Ru.
したがつて記録周期の短縮または圧電素子数の
増加により放電抵抗による電力消費が増加するこ
とになり、圧電素子を駆動するための電源容量も
大型化する欠点を有していた。 Therefore, shortening the recording period or increasing the number of piezoelectric elements increases power consumption due to the discharge resistance, and the power supply capacity for driving the piezoelectric elements also increases.
本発明は上記欠点を除去し、高速でインクジエ
ツト記録を行なつたり圧電素子の数が増加しても
電池の消費電力の増加が抑制され、小型化が可能
なインクジエツト記録ヘツドの駆動回路を提供す
ることを目的とする。 The present invention eliminates the above drawbacks, and provides a drive circuit for an inkjet recording head that can perform high-speed inkjet recording, suppress an increase in battery power consumption even when the number of piezoelectric elements increases, and can be miniaturized. The purpose is to
本発明のインクジエツト記録ヘツドの駆動回路
は第２図及び第３図に示すようなものである。第
２図に本発明の構成を示す。９はDC―DCコンバ
ータ等であり電池等の低電圧電源より記録に必要
な高電圧を得るものである。また１０は圧電素子
駆動回路である。 The drive circuit for the inkjet recording head of the present invention is shown in FIGS. 2 and 3. FIG. 2 shows the configuration of the present invention. 9 is a DC-DC converter, etc., which obtains the high voltage necessary for recording from a low voltage power source such as a battery. Further, 10 is a piezoelectric element drive circuit.
つまり、駆動回路の電源としては、図に示すよ
うに１次側の電源として電池を用いたトランスを
使用し、トランスの２次側（出力側）の一対の端
子の一方にアノード側側をトランス側にしてダイ
オードを接続し、ダイオードのカソード側の電源
ライン（一方の電源ライン）とトランスの他方の
端子に連なる電源ライン（他方の電源ライン）間
に負荷を接続したものである。 In other words, as a power source for the drive circuit, as shown in the figure, a transformer using a battery is used as the primary power source, and the anode side is connected to one of the pair of terminals on the secondary side (output side) of the transformer. A load is connected between the power line on the cathode side of the diode (one power line) and the power line connected to the other terminal of the transformer (the other power line).
負荷としては、図に示すように、抵抗、圧電素
子３―１，３―２，…，３―ｎ、トランジスタ
（スイツチング素子）を、抵抗を一方の電源ライ
ンに、トランジスタを他方の電源ラインに接続
し、圧電素子を抵抗とトランジスタの間になるよ
うに直列接続した圧電素子充電回路を複数個一対
の電源ライン間に並列接続している。 As shown in the figure, the loads include a resistor, piezoelectric elements 3-1, 3-2,..., 3-n, and a transistor (switching element), with the resistor connected to one power line and the transistor connected to the other power line. A plurality of piezoelectric element charging circuits each having a piezoelectric element connected in series between a resistor and a transistor are connected in parallel between a pair of power supply lines.
それぞれのトランジスタのベース（スイツチオ
ンオフ入力信号端子）にはトランジスタのオンオ
フ（開閉）をおこなう信号（記録信号６）が入力
され、それぞれのトランジスタが選択的にオンオ
フ（開閉）され、圧電素子の充放電をおこなう。 A signal (recording signal 6) that turns the transistor on and off (opens and closes) is input to the base of each transistor (switch on/off input signal terminal), and each transistor is selectively turned on and off (opened and closed), charging and discharging the piezoelectric element. will be carried out.
一方の電源ラインには第１のコンデンサC2１
５が接続され、他方の電源ラインには第２のコン
デンサC1が接続されている。第１と第２のコン
デンサの静電容量は、第１のコンデンサの静電容
量が第２のコンデンサの静電容量、及び負荷とし
て接続される複数の圧電素子の合成静電容量より
も充分大きく、また、第１及び第２のコンデンサ
を直列接続したときの静電容量は電源の出力コン
デンサとして十分な大きさとしてある。 One power line has a first capacitor C 2 1
5 is connected, and a second capacitor C1 is connected to the other power supply line. The capacitance of the first and second capacitors is such that the capacitance of the first capacitor is sufficiently larger than the capacitance of the second capacitor and the combined capacitance of the plurality of piezoelectric elements connected as a load. Furthermore, the capacitance when the first and second capacitors are connected in series is set to be large enough to serve as an output capacitor of a power supply.
一方、スイツチング回路１６が設けられてお
り、第１のコンデンサC2の一方の電源ラインに
接続される側と反対側の端子（端子ｃと呼ぶこと
にする）、第２のコンデンサC1の他方の電源ライ
ンに接続される側と反対側の端子（端子ａ）、圧
電素子とトランジスタの結線部のそれぞれにカソ
ード側を接続するようにしてダイオードを接続し
それぞれのダイオードのアノード側を相互に接続
した端子（端子ｂ）、の端子ｃとａ、ｃとｂを相
互に切替接続するようにしてある。 On the other hand, a switching circuit 16 is provided, which connects the terminal of the first capacitor C2 on the side opposite to the one connected to the power supply line (hereinafter referred to as terminal c), and the other side of the second capacitor C1 . Connect the diodes so that the cathode side is connected to the terminal (terminal a) on the opposite side to the side connected to the power supply line, and the connection part of the piezoelectric element and the transistor, and connect the anode sides of each diode to each other. The terminals (terminal b), terminals c and a, and c and b of the terminal (terminal b) are switched and connected to each other.
トランジスタのベースにトランジスタをオフす
る記録信号６が入力され、圧電素子に蓄積された
電荷が放電される場合以外（つまり、トランジス
タをオンする記録信号６がベースに入力され、圧
電素子に電荷を蓄積させる場合等）は、スイツチ
ング回路の端子ｃは端子ａと接続され、第１のコ
ンデンサC2は第２のコンデンサC1と直列接続さ
れ、トランス電源の出力コンデンサとして使用さ
れる。圧電素子３―１，……，３―ｎを放電させ
るときは、記録信号６によりトランジスタがオフ
されるが、スイツチ回路内の端子ｃが端子ｂと接
続され、抵抗、圧電素子、圧電素子とトランジス
タの接続部に接続されたダイオード、及び第１の
コンデンサC1よりなる閉回路が形成され、圧電
素子に蓄積された電荷が放電され、第１のコンデ
ンサC2が充電される。 Except when the recording signal 6 that turns off the transistor is input to the base of the transistor and the charge accumulated in the piezoelectric element is discharged (in other words, the recording signal 6 that turns on the transistor is input to the base and charges are accumulated in the piezoelectric element) (for example, when switching circuits), the terminal c of the switching circuit is connected to the terminal a, and the first capacitor C2 is connected in series with the second capacitor C1 , and is used as an output capacitor of the transformer power supply. When discharging the piezoelectric elements 3-1, . A closed circuit consisting of a diode connected to the connection of the transistor and the first capacitor C 1 is formed, the charge accumulated in the piezoelectric element is discharged, and the first capacitor C 2 is charged.
このようにして、インク吐出の際、圧電素子に
蓄積された電荷は再び第１のコンデンサC2に蓄
えられ、駆動用電源として再使用され電池の電力
消費が著しく低減される。 In this way, during ink ejection, the charge accumulated in the piezoelectric element is stored again in the first capacitor C2 and reused as a driving power source, thereby significantly reducing battery power consumption.
以上説明した本発明のインクジエツト記録ヘツ
ドの駆動回路は高速でインクジエツト記録をおこ
なつたり、ノズルの数が増加して多ノズルとなり
圧電素子の数が増加しても消費電力が抑制され小
型化が可能となり、圧電素子を使用してインクジ
エツト記録をおこなう上で非常に効果を有する。 The drive circuit for the inkjet recording head of the present invention described above can perform inkjet recording at high speed, and even if the number of nozzles increases and the number of piezoelectric elements increases, power consumption can be suppressed and miniaturization is possible. This is very effective when performing inkjet recording using piezoelectric elements.
第１図は従来技術の説明図。第２図及び第３図
は本発明のインクジエツト記録ヘツドの駆動回路
の実施例説明図。
１―１……１―ｎ…スイツチング素子、２―１
……２―ｎ…インク吐出特性調整用抵抗、３―１
……３―ｎ…圧電素子、４…スイツチング素子、
５…放電用抵抗、６…記録信号、７…リセツト信
号、８―１……８―ｎ…ダイオード、９…DC―
DCコンバータ、１５…コンデンサ、１６…スイ
ツチ回路。
FIG. 1 is an explanatory diagram of the prior art. FIGS. 2 and 3 are explanatory diagrams of an embodiment of a drive circuit for an inkjet recording head according to the present invention. 1-1...1-n...switching element, 2-1
...2-n...Resistance for adjusting ink ejection characteristics, 3-1
...3-n...piezoelectric element, 4...switching element,
5...Discharge resistor, 6...Record signal, 7...Reset signal, 8-1...8-n...Diode, 9...DC-
DC converter, 15...capacitor, 16...switch circuit.
Claims (1)
ンス結合された２次側巻線の一対の端子の一方に
アノード側を前記２次巻線側にしてダイオードを
接続し前記ダイオードのカソード側の電源ライン
（一方の電源ライン）と前記トランスの他方の端
子に連なる電源ライン（他方の電源ライン）間に
負荷を接続する電源を構成し、 前記負荷として、抵抗、圧電素子及びスイツチ
ツング素子を前記抵抗を前記一方の電源ライン
に、前記スイツチツング素子を前記他方の電源ラ
インに、前記圧電素子を前記抵抗とスイツチツン
グ素子の間になるように直列接続した圧電素子充
電回路を複数個前記一対の電源ライン間に並列接
続し、 前記それぞれのスイツチツング素子の入力信号
端子に前記スイツチツング素子のオンオフ信号を
入力することにより前記スイツチツング素子のオ
ンオフを行ない前記圧電素子を選択的に充電させ
るインクジエツト記録ヘツドの駆動回路におい
て、 前記一方の電源ラインと他方の電源ラインにそ
れぞれ第１及び第２のコンデンサを接続し、 前記第１のコンデンサの静電容量は前記第２の
コンデンサの静電容量、及び前記複数の圧電素子
の合成静電容量よりも充分大きく、 前記２つのコンデンサを直列接続した時の静電
容量は前記電源の出力コンデンサとして十分な大
きさとなるようにし、 前記第１のコンデンサの前記一方の電源ライン
に接続される側と反対側の第１の端子（端子ｃ）
を 前記第２のコンデンサの前記他方の電源ライン
に接続される側と反対側の第２の端子（端子ａ）
と、 前記圧電素子と前記スイツチング素子の結線部
のそれぞれにカソード側を接続するようにしてダ
イオードを接続し、前記それぞれのダイオードの
アノード側を相互に接続した第３の端子（端子
ｂ）の いずれか一方と切替接続するスイツチング回路
を設け、 前記スイツチング素子をオンして前記圧電素子
を充電させる場合には前記第１の端子ｃと前記第
２の端子ａが接続され、前記スイツチング素子を
オフして前記圧電素子の電荷を放電させる場合に
は前記第１の端子ｃと前記第３の端子ｂが接続さ
れることを特徴とする インクジエツト記録ヘツドの駆動回路。[Claims] 1. A battery is used as a primary power source of a transformer, and a diode is connected to one of a pair of terminals of a transformer-coupled secondary winding with the anode side facing the secondary winding, and the diode A power source is configured to connect a load between a power line on the cathode side (one power line) and a power line connected to the other terminal of the transformer (the other power line), and the load includes a resistor, a piezoelectric element, and a switch. A plurality of piezoelectric element charging circuits are connected in series such that the resistor is connected to the one power supply line, the switching element is connected to the other power supply line, and the piezoelectric element is between the resistor and the switching element. The ink jet recording head is connected in parallel between the power lines of the piezoelectric elements, and inputs an on/off signal of the switching element to an input signal terminal of each of the switching elements to turn on/off the switching element and selectively charge the piezoelectric element. In the drive circuit, first and second capacitors are connected to the one power supply line and the other power supply line, respectively, and the capacitance of the first capacitor is equal to the capacitance of the second capacitor and the plurality of capacitors. is sufficiently larger than the combined capacitance of the piezoelectric elements of the first capacitor, and the capacitance when the two capacitors are connected in series is sufficiently large as an output capacitor of the power supply, and one of the first capacitors is The first terminal (terminal c) on the side opposite to the side connected to the power line
a second terminal (terminal a) of the second capacitor on the side opposite to the side connected to the other power supply line;
and a third terminal (terminal b) in which diodes are connected with their cathodes connected to the connection portions of the piezoelectric element and the switching element, respectively, and the anode sides of the respective diodes are connected to each other. A switching circuit is provided for switching connection to one of the piezoelectric elements, and when the switching element is turned on to charge the piezoelectric element, the first terminal c and the second terminal a are connected, and the switching element is turned off. 1. A drive circuit for an inkjet recording head, wherein the first terminal c and the third terminal b are connected when the charge of the piezoelectric element is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16375178A JPS5590372A (en) | 1978-12-28 | 1978-12-28 | Driving circuit for ink jet recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16375178A JPS5590372A (en) | 1978-12-28 | 1978-12-28 | Driving circuit for ink jet recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5590372A JPS5590372A (en) | 1980-07-08 |
| JPS6226913B2 true JPS6226913B2 (en) | 1987-06-11 |
Family
ID=15779995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16375178A Granted JPS5590372A (en) | 1978-12-28 | 1978-12-28 | Driving circuit for ink jet recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5590372A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6080944U (en) * | 1983-11-10 | 1985-06-05 | キヤノン株式会社 | Recording head monitoring device |
| JP5206071B2 (en) * | 2008-03-31 | 2013-06-12 | ブラザー工業株式会社 | Piezoelectric actuator and liquid transfer device |
-
1978
- 1978-12-28 JP JP16375178A patent/JPS5590372A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5590372A (en) | 1980-07-08 |
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