JPH03133647A - Driver in ink jet printer - Google Patents
Driver in ink jet printerInfo
- Publication number
- JPH03133647A JPH03133647A JP27305189A JP27305189A JPH03133647A JP H03133647 A JPH03133647 A JP H03133647A JP 27305189 A JP27305189 A JP 27305189A JP 27305189 A JP27305189 A JP 27305189A JP H03133647 A JPH03133647 A JP H03133647A
- Authority
- JP
- Japan
- Prior art keywords
- scanning voltage
- transistor
- transistors
- time constant
- 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.)
- Pending
Links
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 238000007641 inkjet printing Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000004916 vomit Anatomy 0.000 description 1
- 230000008673 vomiting Effects 0.000 description 1
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はインク噴射を制御してドツトマトリックスで文
字・図形を形成するインク噴射プリンタの駆動装置の新
規なる４１１ＰＪ成に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel 411PJ configuration of a drive device for an ink jet printer that controls ink jet to form characters and figures in a dot matrix.
従来技術による実施例を示すのが第５図で、その作動波
形を示すのが第７図である。FIG. 5 shows an example according to the prior art, and FIG. 7 shows its operating waveform.
まず、第６図で本発明に係るインク噴射プリンタの礪Ｈ
４部を説明する。第６図はインクの動きを説明する断面
図で第６図（ａ）が待機状態、 （ｂ）がゆるやかに噴
射条件設定過程、 （Ｃ）が噴射状態を示すものである
。５は基材でノズル７を有する。６は弾性のある基材で
基材５とでインク８を挟持する。３は電歪素子で電界に
よって伸縮するが大低のものは縮む方向が多い。電歪素
子３はノズル７に対向して基材６に固着されている。電
界を印加する電極は図示してないが、第６図（ａ）で電
界が加えられ電歪素子３は縮んで基材６がノズル側へ突
曲して待機状態を示す。第４図（ｂ）は除々に印加電界
を取除いた状態でインク８は外気を取込まない様にゆっ
くり矢印方向に動く。ここで、急激に電歪素子３に電界
を印加すると基材６はノズル７側へ突曲して第６図（Ｃ
）の矢印方向にインク８を押圧して、一部はノズル７よ
り吐出する。この吐出インク８でマトリックス形成して
文字・図形をプリントアウトする。この様なインク噴射
機構部がシリアル方式のプリンタでは、８〜４８個程度
、ラインプリンタでは数十個に及ぶ、第６図（Ｃ）で電
界を加えたままにすると、第６図（ａ）の待機状態にな
る。First, FIG. 6 shows the height of the ink jet printer according to the present invention.
Part 4 will be explained. FIG. 6 is a cross-sectional view explaining the movement of ink, and FIG. 6(a) shows a standby state, FIG. 6(b) shows a gradual ejection condition setting process, and FIG. 6(C) shows an ejecting state. 5 is a base material having a nozzle 7. Reference numeral 6 denotes an elastic base material, and the ink 8 is sandwiched between the base material 5 and the base material 5 . 3 is an electrostrictive element that expands and contracts depending on the electric field, and the large and low ones often contract in the direction. The electrostrictive element 3 is fixed to the base material 6 facing the nozzle 7. Although the electrode for applying the electric field is not shown, as shown in FIG. 6(a), when the electric field is applied, the electrostrictive element 3 contracts and the base material 6 protrudes toward the nozzle side, indicating a standby state. FIG. 4(b) shows a state in which the applied electric field is gradually removed, and the ink 8 moves slowly in the direction of the arrow so as not to take in outside air. Here, when an electric field is suddenly applied to the electrostrictive element 3, the base material 6 is bent toward the nozzle 7 side as shown in FIG.
) The ink 8 is pressed in the direction of the arrow, and a portion is ejected from the nozzle 7. This ejected ink 8 forms a matrix and prints out characters and figures. Serial printers have about 8 to 48 such ink ejection mechanisms, and line printers have dozens of ink ejection mechanisms. is in standby mode.
この様に電歪素子３に印加制御する従来技術による例が
第５図である。FIG. 5 shows an example of the prior art in which the voltage applied to the electrostrictive element 3 is controlled in this manner.
１は出力電圧ＶＯの高圧電源でＶｏ＝５０〜２００Ｖの
範囲の定電圧源である。ＴＲＩは電圧Ｖｏをスイッチす
るＰチャンネルのトランジスタである。Reference numeral 1 denotes a high voltage power source with an output voltage VO, which is a constant voltage source in the range of Vo=50 to 200V. TRI is a P-channel transistor that switches voltage Vo.
２は電歪素子３を駆動する駆動部の１個を示す図である
。2 is a diagram showing one of the driving parts that drives the electrostrictive element 3. FIG.
トランジスタＴＲＩがＯＮすると急激にダイオドＤと抵
抗Ｒ＋（Ｒ＋＝数にΩ）で電歪素子３の寄生容重を充電
して第６１１（ｃ）の状態でインクを吐出させる。ＴＲ
ＩＩはＮチャンネルのトランジスタで抵抗Ｒ２（数十に
Ω）でゆっくり電歪素子３の電荷を吸収して第６図（ｂ
）の状態にする。抵抗Ｒ３は数百にΩの抵抗で体印中に
電歪素子３のリーク等で電荷が失われない様に補給する
ものである。又電源投入時にインクが吐出しない様に高
い抵抗値にする。■×はトランジスタＴＲＩの出力電圧
を表す。When the transistor TRI is turned on, the parasitic capacity of the electrostrictive element 3 is rapidly charged by the diode D and the resistor R+ (R+=Ω in number), and ink is ejected in the state 611(c). T.R.
II is an N-channel transistor that slowly absorbs the charge of the electrostrictive element 3 with a resistor R2 (several tens of ohms), and as shown in Fig. 6 (b).
). The resistor R3 is a resistor of several hundred ohms and is used to replenish the charge so that the charge is not lost due to leakage of the electrostrictive element 3 during the body marking. Also, set a high resistance value so that ink will not be ejected when the power is turned on. ■× represents the output voltage of the transistor TRI.
４は駆動信号発生手段で、印字データを基に線４ａによ
りトランジスタＴＲＩの制御信号と駆動部２のトランジ
スタＴＲＤに印字データに対応した信号を与えるもので
ある。Reference numeral 4 denotes a drive signal generating means which provides a control signal for the transistor TRI and a signal corresponding to the print data to the transistor TRD of the drive unit 2 via a line 4a based on the print data.
トランジスタＴＲＩの制御信号を示すのが第７図（ａ）
で、トランジスタＴＲＤへの信号が第７図（ｂ）、電歪
素子３に印加される電圧が第７図（Ｃ）である。吐出・
非吐と記した近傍がインク噴射のタイミングである。非
噴射時は電歪素子３は高圧ｖ×が印加されたままである
。Figure 7(a) shows the control signal of transistor TRI.
The signal to the transistor TRD is shown in FIG. 7(b), and the voltage applied to the electrostrictive element 3 is shown in FIG. 7(C). vomit·
The vicinity marked as non-ejection is the timing of ink ejection. During non-injection, the high voltage vx remains applied to the electrostrictive element 3.
尚、以後の説明でトランジスタの極性で実際の信号は極
性が異なるが、高い側が真で低い側が偽として表現する
ものとする。In the following explanation, although the actual signal polarity differs depending on the polarity of the transistor, it is assumed that the higher side is true and the lower side is false.
しかし、前述の従来技術は所定駆動波形を得るに１個の
駆動部に、１個のダイオド、値の大きく異なる３個の抵
抗と１個のトランジスタで構成要素が多い問題点がある
。更には、高圧作動でＩＣ化（集積化）も困難で個別部
品を用いざるをえなく、ノズル数が多い場合は実装面積
の増大とアセンブリコストの増大という大きな問題点を
有していた。However, the above-mentioned conventional technology has a problem in that one driver has many components including one diode, three resistors of greatly different values, and one transistor in order to obtain a predetermined drive waveform. Furthermore, the high-pressure operation makes IC integration (integration) difficult and requires the use of individual parts, and when the number of nozzles is large, there is a big problem of increased mounting area and assembly cost.
そこで本発明のこの様な問題を解決するもので、所定の
駆動波形に対応した走査電圧を共通に又はグループ分け
して発生せしめて電歪素子にこの走査電圧を選択的に与
える様にした署！４成要素を低減してＩＣ化を容易にし
て安価なインク噴射プリンタの駆動装置の提倶にある。Therefore, the present invention is intended to solve such problems, and is a signature in which scanning voltages corresponding to predetermined drive waveforms are generated in common or in groups, and the scanning voltages are selectively applied to the electrostrictive element. ! The object of the present invention is to provide an inexpensive drive device for an ink jet printer that can be easily integrated into an IC by reducing the number of four components.
（課題を解決するための手段〕
本発明のインク噴射プリンタの駆動装置は、電源と少な
くとも１個のスイッチ手段とで直列的に接続されている
時定数回路と一方は少なくとも前記時定数回路の電位で
制御され前記電源と直列接続されているトランジスタ対
の増幅器よりなる走査電圧発生手段が、任意の波形でし
かも低インピーダンスである走査電圧を発生するのが大
きな特徴である。(Means for Solving the Problems) The drive device for an ink jet printer of the present invention includes a time constant circuit connected in series with a power supply and at least one switch means, and one of which has a voltage potential of at least the time constant circuit. A major feature is that the scanning voltage generating means, which is controlled by a transistor pair amplifier and connected in series with the power supply, generates a scanning voltage having an arbitrary waveform and low impedance.
この走査電圧を駆動信号発生手段の信号で制御されるゲ
ート手段を介してＯＮ−〇ＦＦさせてインク噴射を制御
する。This scanning voltage is turned on and off through gate means controlled by a signal from the drive signal generating means to control ink ejection.
前記走査電圧発生手段の走査電圧の発生タイミングが駆
動信号発生手段の信号とが同期する必要から走査電圧制
御手段を設けて前記走査電圧発生手段を制御する。Since the timing of generation of the scanning voltage by the scanning voltage generating means needs to be synchronized with the signal from the drive signal generating means, a scanning voltage control means is provided to control the scanning voltage generating means.
又前記時定数回路の時定数を変更せしめる時定数変更手
段を設けることにより、最適な走査電圧を得て安定にイ
ンク噴射を可０ヒにしたのも大きな特徴である。Another major feature is that by providing a time constant changing means for changing the time constant of the time constant circuit, an optimum scanning voltage can be obtained and stable ink jetting can be achieved.
更には前記トランジスタ対の一方又は両方共に別のトラ
ンジスタを（Ｉｆ設して走査電圧作動範囲を広げたのも
大きな特徴である。Another major feature is that one or both of the transistor pairs are provided with another transistor (If) to widen the scanning voltage operating range.
各駆動部で駆動波形を生成するのでなく、共通な走査電
圧発生手段より実行する故、構成要素の低減とインク噴
射の安定化が計れる。Since the driving waveform is not generated by each driving section but by a common scanning voltage generating means, the number of components can be reduced and ink jetting can be stabilized.
第１図は本発明の実施例の回路とブロックを示す図であ
る。第５図と同じ番号・記号は同意味を有するものとす
る。FIG. 1 is a diagram showing circuits and blocks of an embodiment of the present invention. The same numbers and symbols as in FIG. 5 have the same meaning.
１０は走査電圧ＶＳを発生する走査電圧発生手段である
。１１は走査電圧制御手段で所定のタイミングで前記走
査電圧発生手段を制御する。Reference numeral 10 denotes a scanning voltage generating means for generating the scanning voltage VS. A scanning voltage control means 11 controls the scanning voltage generating means at a predetermined timing.
１２は駆動部で、インク噴射の電歪素子３を含む機構部
と走査電圧Ｖ、を通過させるゲート手段１３よりなる。Reference numeral 12 denotes a driving section, which includes a mechanism section including an electrostrictive element 3 for ejecting ink, and a gate means 13 through which a scanning voltage V passes.
１４は駆動信号発生手段でゲート手ｐｉ１３の制御信号
と走査電圧制御手段に同期信号を与える。Reference numeral 14 denotes a drive signal generating means which provides a control signal for the gate hand pi 13 and a synchronization signal to the scanning voltage control means.
１５は駆動信号発生手段１４への信号を表し、印字デー
タ、所定のクロック等を含む。Reference numeral 15 represents a signal to the drive signal generating means 14, which includes print data, a predetermined clock, and the like.
ここで、走査電圧発生手段１ｏを説明する。線１１ａの
信号は第２図（ａ）で、ＮチャンネルのトランジスタＴ
Ｍ２を励起して抵抗Ｒ４とＲ５でレベル変換して、Ｐチ
ャンネルのトランジスタＴＲ３とＴＲ４を急速に立上げ
る。Here, the scanning voltage generating means 1o will be explained. The signal on line 11a is shown in FIG.
M2 is excited and the level is converted by resistors R4 and R5, and P-channel transistors TR3 and TR4 are quickly turned on.
コンデンサーＣＴと並列接続されている抵抗Ｒ６、抵抗
Ｒ７とＮチャンネルのトランジスタＴＲ６とで時定数回
路を構成する。トランジスタＴＲ３が導通中にコンデン
サーＣＴは電源電圧ＶＯに充電される。A time constant circuit is constituted by a resistor R6 and a resistor R7 connected in parallel with the capacitor CT, and an N-channel transistor TR6. While the transistor TR3 is conductive, the capacitor CT is charged to the power supply voltage VO.
トランジスタＴｌｌがＯＦＦすると、時定数回路の電位
は下降する。この下降する電位をＰチャンネルのトラン
ジスタＴＲ＆をドレイン接地してトランジスタＴＲ４と
出力点で接続して走査電圧ｖｓを低インピーダンスで出
力する。When the transistor Tll is turned off, the potential of the time constant circuit decreases. This falling potential is connected to the transistor TR4 at the output point by grounding the drain of the P-channel transistor TR&, and outputting the scanning voltage vs at a low impedance.
出力の走査電圧Ｖｓの例を第２図（ｄ）に示す。An example of the output scanning voltage Vs is shown in FIG. 2(d).
Ｐｌは時定数回路の時定数を前半を長く、後半を短くし
たもので、第２図（ｂ）の様な線１１ｂの信号でトラン
ジスタＴ’ｓを導通せしめて後半の時定数を短くする。Pl is the time constant of the time constant circuit made longer in the first half and shorter in the latter half, and the signal on the line 11b as shown in FIG. 2(b) makes the transistor T's conductive to shorten the time constant in the latter half.
Ｐｌは時定数回路の設定をコンデンサーＣｔと抵抗Ｒ６
とで定める例である。Ｐ＋の様にした場合の方が時定数
の時間幅が正確になる。Pl is the time constant circuit setting using capacitor Ct and resistor R6.
This is an example defined by When P+ is used, the time width of the time constant becomes more accurate.
トランジスタＴＲ７は第２図（Ｃ）の様なタイミングで
線１１ｃの信号で導通させて走査電圧の下降方向の最終
段階で接地電位にするもので、トランジスタＴ１１のグ
ー１−電極のスレイショルド分を補償するものである。The transistor TR7 is made conductive by the signal on the line 11c at the timing shown in FIG. 2(C) and brought to the ground potential at the final stage of the downward direction of the scanning voltage, thereby compensating for the threshold of the goo-1 electrode of the transistor T11. It is something to do.
ダイオドＤ１とＤ２はトランジスタＴＲＩとＴＲ４が逆
バイアスになるのを防止する為のものである。Diodes D1 and D2 are for preventing transistors TRI and TR4 from becoming reverse biased.
走査電圧発生手段１０をこの様に形成すると、走査電圧
はほぼ電源電圧の振幅であり、出力インピーダンスは立
上方向はトランジスタＴＲ４で下降方向はトランジスタ
ＴＲＩとＴｊｌで定まり、約１Ω近傍に設定可能となる
。低インピーダンス出力は負荷変化に対して走査電圧波
形が影響されず安定なインク噴射状態が得られる特徴が
ある。When the scanning voltage generating means 10 is formed in this way, the scanning voltage has approximately the amplitude of the power supply voltage, and the output impedance is determined by the transistor TR4 in the rising direction and by the transistors TRI and Tjl in the falling direction, and can be set to approximately 1Ω. Become. The low impedance output has the characteristic that the scanning voltage waveform is not affected by load changes and a stable ink ejection state can be obtained.
ゲート手段１３は第２図（ｅ）のタイミング、即ち走査
電圧ｖｓが最高時点で開いて必ず電歪素子３が待機状態
にある様にして、リークを補償する。The gate means 13 opens at the timing shown in FIG. 2(e), that is, when the scanning voltage vs is at its highest, so that the electrostrictive element 3 is always in a standby state to compensate for leakage.
第２図（ｆ）は非作動時の電歪素子３の電圧ＶＯ近傍の
充電電圧の様子を示す。FIG. 2(f) shows the charging voltage near the voltage VO of the electrostrictive element 3 during non-operation.
第２図（ｇ）がインク吐出、非吐出、吐出でのゲート手
段１３への制御信号の例を示し、通過した走査電圧の例
を第２図（ｈ）に示す。FIG. 2(g) shows an example of the control signal to the gate means 13 for ink ejection, non-ejection, and ejection, and FIG. 2(h) shows an example of the passing scanning voltage.
次に第３図で本発明の他の実施例を説明する。Next, another embodiment of the present invention will be explained with reference to FIG.
図は走査電圧発生手段のみ図示し、各トランジスタの制
御線は省略した。The figure shows only the scanning voltage generating means, and the control lines for each transistor are omitted.
第３図は時定数回路を変更して、走査電圧Ｖ９を両方向
に傾斜を設定する様にしたものである。In FIG. 3, the time constant circuit is changed to set the slope of the scanning voltage V9 in both directions.
立上りは、 トランジスタＴＲ３とＴ Ｒ１１ｌがＯＮ
で、ＴＲ５がＯＦＦで、時定数をコンデンサーｃ吐抵抗
Ｒ８と定めて、ＮチャンネルのトランジスタＴＲ１１で
ドレイン接地で増幅する。立下りはトランジスタＴＲ３
は０ＦＦＩ’、Ｔ Ｒ目トＴ ａｓがＯＮで時定数ハコ
ンデンサーＣＴと抵抗Ｒ会で定めて、 トランジスタＴ
Ｒ＠でドレイン接地増幅する。トランジスタＴＲ？とＰ
チャンネルのトランジスタＴＲＩは第１図の役割りと同
じである。At the rising edge, transistors TR3 and TR11l are ON.
Then, when TR5 is OFF, the time constant is set as the capacitor C and the discharge resistor R8, and the N-channel transistor TR11 is amplified with the drain connected to the ground. The falling edge is caused by transistor TR3.
is 0FFI', T as is ON, the time constant is determined by the capacitor CT and the resistor R, and the transistor T
Amplify the drain with R@. Transistor TR? and P
The channel transistor TRI has the same role as in FIG.
第３図の様子を示すのが第４図で（ａ）がＴＲ３、（ｂ
）がＴＲ６、（ｃ）がＴＲｖ、 （ｄ）がＴＲ１１の各
トランジスタの動作例をしめし、 （ｅ）が走査電圧Ｖ
ｓの出力例である。実線がトランジスタＴＲＹとＴＲ９
を作動させた場合、点線が作動させない場合で電圧範囲
がせまくなる。Figure 4 shows the situation in Figure 3, where (a) is TR3 and (b)
) shows an example of the operation of each transistor: TR6, (c) shows TRv, (d) shows the operation example of each transistor, and (e) shows the scanning voltage V.
This is an example of the output of s. Solid lines are transistors TRY and TR9
When activated, the dotted line indicates when not activated, and the voltage range becomes narrower.
ゲート手段１３は走査電圧Ｖｓを通過させるのみである
故、電力消費も小さく出来る特徴がある。Since the gate means 13 only allows the scanning voltage Vs to pass through, it has the characteristic that power consumption can be reduced.
以上述べた本発明の構成によれば、駆動部の構成要素を
低減して任意の立上り・立下り特性の走査電圧でインク
噴射制御する故、極めて安定な制御特性が得られること
。駆動部の構成要素低減したことにより少なくともゲー
ト手段と駆動信号発生手段を含めてＩＣ化が容易である
こと。上記のことからプリンタのコスト低減と小型化に
絶大なる貢献をするものである。According to the configuration of the present invention described above, extremely stable control characteristics can be obtained because the number of components of the driving section is reduced and ink ejection is controlled using a scanning voltage with arbitrary rise and fall characteristics. By reducing the number of components of the driving section, it is easy to integrate at least the gate means and the driving signal generating means into an IC. From the above, it makes a tremendous contribution to cost reduction and miniaturization of printers.
第１図は本発明の実施例に於る具体的な回路とブロック
の構成例を示すズである。第２図は第１図の各部の作動
波形を示す図である。
第３図は本発明の他の実施例の部分回路を示す図であり
、第４図がその作動波形例を示す図である。
第５図は従来技術による実施例の構成を示す図で、第７
図がその作動波形を示す図である。第６図は本発明に係
るインク噴射プリンタの機構部の断面図とインクの動き
を説明する図である。
以 上FIG. 1 shows an example of a specific circuit and block configuration in an embodiment of the present invention. FIG. 2 is a diagram showing operating waveforms of each part in FIG. 1. FIG. 3 is a diagram showing a partial circuit of another embodiment of the present invention, and FIG. 4 is a diagram showing an example of its operating waveform. FIG. 5 is a diagram showing the configuration of an embodiment according to the prior art, and FIG.
The figure is a diagram showing its operating waveform. FIG. 6 is a cross-sectional view of the mechanical part of the ink jet printer according to the present invention and a diagram illustrating the movement of ink. that's all
Claims (3)
噴射せしめて、ドットマトリックスで文字・図形を形成
するインク噴射プリンタの駆動装置に於て、電源と少な
くとも１個のスイッチ手段とで直列的に接続されている
時定数回路と一方は少なくとも前記時定数回路の電位で
制御され前記電源と直列接続されているトランジスタ対
の増幅器よりなる走査電圧発生手段、この走査電圧発生
手段の走査電圧を所定のタイミングで前記電歪素子に印
加するゲート手段、このゲート手段に制御信号を与える
駆動信号発生手段、及びこの駆動信号発生手段と同期し
て前記走査電圧発生手段を制御する走査電圧制御手段よ
り構成して、構成要素を低減してなることを特徴とする
インク噴射プリンタの駆動装置。(1) In a drive device for an ink jet printer that presses ink with an electrostrictive element and jets the ink from a nozzle to form characters and figures in a dot matrix, a power supply and at least one switch means are connected in series. scanning voltage generating means comprising an amplifier of a pair of transistors, one of which is controlled by the potential of at least the time constant circuit and connected in series with the power supply; a scanning voltage of the scanning voltage generating means; A gate means for applying an voltage to the electrostrictive element at a predetermined timing, a drive signal generation means for applying a control signal to the gate means, and a scanning voltage control means for controlling the scanning voltage generation means in synchronization with the drive signal generation means. 1. A drive device for an ink jet printer, characterized in that the number of components is reduced.
を変更せしめる時定数変更手段を設けてなることを特徴
とするインク噴射プリンタの駆動装置。(2) The drive device for an ink jet printer according to claim 1, further comprising time constant changing means for changing the time constant of the time constant circuit.
タ対の一方又は両方に並列に別のトランジスタを配して
走査電圧範囲を広げたことを特徴とするインク噴射プリ
ンタの駆動装置。(3) The drive device for an ink jet printer according to claims 1 and 2, characterized in that another transistor is arranged in parallel with one or both of the pair of transistors to widen the scanning voltage range.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27305189A JPH03133647A (en) | 1989-10-20 | 1989-10-20 | Driver in ink jet printer |
| EP90107288A EP0393602B1 (en) | 1989-04-17 | 1990-04-17 | Ink-jet printer driver |
| DE69017936T DE69017936T2 (en) | 1989-04-17 | 1990-04-17 | Driver for an inkjet printer. |
| US08/035,886 US5347300A (en) | 1989-04-17 | 1993-03-23 | Ink-jet printer driver |
| HK94097A HK94097A (en) | 1989-04-17 | 1997-06-26 | Ink-jet printer driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27305189A JPH03133647A (en) | 1989-10-20 | 1989-10-20 | Driver in ink jet printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03133647A true JPH03133647A (en) | 1991-06-06 |
Family
ID=17522475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27305189A Pending JPH03133647A (en) | 1989-04-17 | 1989-10-20 | Driver in ink jet printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03133647A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001010043A (en) * | 1999-04-30 | 2001-01-16 | Toshiba Tec Corp | Apparatus for driving capacitive element |
| JP2005289013A (en) * | 2004-04-06 | 2005-10-20 | Brother Ind Ltd | Drive circuit for inkjet device and inkjet printer |
| JP2012000959A (en) * | 2010-06-21 | 2012-01-05 | Brother Industries Ltd | Liquid ejecting device, controller, and program |
-
1989
- 1989-10-20 JP JP27305189A patent/JPH03133647A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001010043A (en) * | 1999-04-30 | 2001-01-16 | Toshiba Tec Corp | Apparatus for driving capacitive element |
| JP4515584B2 (en) * | 1999-04-30 | 2010-08-04 | 東芝テック株式会社 | Capacitive element driving device |
| JP2005289013A (en) * | 2004-04-06 | 2005-10-20 | Brother Ind Ltd | Drive circuit for inkjet device and inkjet printer |
| JP2012000959A (en) * | 2010-06-21 | 2012-01-05 | Brother Industries Ltd | Liquid ejecting device, controller, and program |
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