JPS6135955B2 - - Google Patents
Info
- Publication number
- JPS6135955B2 JPS6135955B2 JP55102826A JP10282680A JPS6135955B2 JP S6135955 B2 JPS6135955 B2 JP S6135955B2 JP 55102826 A JP55102826 A JP 55102826A JP 10282680 A JP10282680 A JP 10282680A JP S6135955 B2 JPS6135955 B2 JP S6135955B2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- recording
- electrode
- electrodes
- voltage
- 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
- 238000000034 method Methods 0.000 claims description 6
- 230000002079 cooperative effect Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000001454 recorded image 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
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
-
- 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
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
- B41J2002/061—Ejection by electric field of ink or of toner particles contained in ink
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】
本発明は、静電加速形インクジエツト記録方式
に用いられるインク記録用ヘツドの駆動方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving an ink recording head used in an electrostatic acceleration type inkjet recording system.
第１図は、かかるインク記録用ヘツドを主体と
して示す斜視図であり、絶縁材を用いた互に対向
する上板１ａおよび下板１ｂからなるヘツド部２
の上方には、インク３を貯溜するインク容器４が
設けてあり、インク容器４の内部とヘツド部２の
内部とは連通、常時インク３がヘツド部２の内部
へ供給されるものとなつている。 FIG. 1 is a perspective view mainly showing such an ink recording head, and the head portion 2 is composed of an upper plate 1a and a lower plate 1b made of an insulating material and facing each other.
An ink container 4 for storing ink 3 is provided above, and the inside of the ink container 4 and the inside of the head section 2 are communicated so that the ink 3 is always supplied to the inside of the head section 2. There is.
また、ヘツド部２のインク噴出口５と対向し
て、垂直方向へ移送される記録紙６が張架されて
おり、その背面側には接地導体７が設けてある。 Further, a recording paper 6 to be conveyed vertically is stretched across the ink ejection port 5 of the head section 2, and a ground conductor 7 is provided on the back side of the recording paper 6.
第２図は、インク噴出口５側から見た斜視図で
あり、スリツト状のインク噴出口５の内部には、
インク３の噴出方向に沿つて複数の記録電極８が
配列されており、これらの記録電極８にはドライ
バ９の出力が接続され、画信号Svに応じてドラ
イバ９の発生する高電圧パルスが記録電極８へ印
加されるものとなつている。 FIG. 2 is a perspective view seen from the ink jet port 5 side, and inside the slit-shaped ink jet port 5, there are
A plurality of recording electrodes 8 are arranged along the ejecting direction of the ink 3, the output of a driver 9 is connected to these recording electrodes 8, and high voltage pulses generated by the driver 9 are recorded according to the image signal Sv. The voltage is applied to the electrode 8.
したがつて、インク噴出口５へメニスカスを形
成しているインク３へ、記録電極８と接地導体７
との間にわたる静電力が高電圧パルスの印加によ
つて与えられると、高電圧パルスの印加されてい
る記録電極８の部位からインク３が噴出し、これ
が記録紙６へ付着することにより、ドツト状の記
録が行なわれ、この動作を連続的に反復すること
によつて、画信号Svに応じた記録画が形成され
る。 Therefore, the recording electrode 8 and the ground conductor 7 are transferred to the ink 3 forming a meniscus to the ink jet port 5.
When an electrostatic force between the ink and the ink is applied by applying a high voltage pulse, the ink 3 is ejected from the part of the recording electrode 8 to which the high voltage pulse is applied, and this adheres to the recording paper 6, forming a dot. By continuously repeating this operation, a recorded image corresponding to the image signal Sv is formed.
しかし、インク３の噴出を制御する記録ヘツド
の駆動方式としては、上述のもののほか、インク
噴出口５の内部へ別途の制御電極を設けておき、
インク３の噴出を停止させるときに、記録電極８
へ印加する高電圧パルスと逆極性の高電圧を印加
する方式も採用されており、この場合には、記録
電極８と制御電極との間に、各々へ印加される高
電圧の和電圧が発生し、これによつて生ずる放電
により電極が破壊される欠点を生じていた。 However, as a driving method for the recording head to control the ejection of the ink 3, in addition to the above-mentioned method, a separate control electrode is provided inside the ink ejection port 5.
When stopping the ejection of the ink 3, the recording electrode 8
A method of applying a high voltage of opposite polarity to the high voltage pulse applied to the recording electrode 8 and the control electrode is also adopted, and in this case, a sum voltage of the high voltages applied to each is generated between the recording electrode 8 and the control electrode. However, this has resulted in the disadvantage that the electrodes are destroyed by the discharge that occurs.
本発明は、従来のかかる欠点を根本的に排除す
ると共に、記録電極へ高電圧パルスを印加するド
ライバまたはスイツチ等の数を記録電極数に比し
て減少させることのできる極めて効果的な、イン
ク記録用ヘツドの駆動方法を提供するものであ
る。 The present invention fundamentally eliminates such drawbacks of the conventional technology, and provides an extremely effective ink composition that can reduce the number of drivers or switches that apply high voltage pulses to the recording electrodes compared to the number of recording electrodes. A method for driving a recording head is provided.
以下、実施例を示す第３図以降により本発明の
詳細を説明する。 The details of the present invention will be explained below with reference to FIG. 3 and subsequent figures showing embodiments.
第３図および第４図は、第２図におけるＸ−Ｙ
断面図であり、第３図においては、上板１ａの内
面に記録電極８ａ〜８ｉが設けられ、これらは互
に隣接する同電極８ａ〜８ｃ，８ｄ〜８ｆ，８ｇ
〜８ｉ毎に群として分割されており、これらの記
録電極群８ａ〜８ｃ、８ｄ〜８ｆ，８ｇ〜８ｉと
対応して下板１ｂの内面に制御電極１０ａ〜１０
ｃが設けてある。 Figures 3 and 4 are X-Y in Figure 2.
This is a sectional view, and in FIG. 3, recording electrodes 8a to 8i are provided on the inner surface of the upper plate 1a, and these are adjacent to the same electrodes 8a to 8c, 8d to 8f, and 8g.
Control electrodes 10a to 10 are arranged on the inner surface of the lower plate 1b corresponding to these recording electrode groups 8a to 8c, 8d to 8f, and 8g to 8i.
c is provided.
ここで、例えば記録電極８ａへのみ波高値
2KV、パルス幅200μsecのパルス電圧を印加すれ
ば、インク３の噴出条件に達し、記録電極８ａの
部位からインク３が噴出するのに対し、波高値
2KV、パス幅100μsecのパルス電圧を印加したと
きには噴出条件に達せず、噴出が行なわれない。 Here, for example, the peak value only for the recording electrode 8a is
If a pulse voltage of 2 KV and a pulse width of 200 μsec is applied, the conditions for ejecting ink 3 are reached and the ink 3 is ejected from the recording electrode 8a, while the peak value
When a pulse voltage of 2 KV and a path width of 100 μsec is applied, the jetting condition is not reached and no jetting occurs.
しかし、記録電極８ａと制御電極１０ａとへ、
各単独では噴出条件とならない波高値2KV、パル
ス幅100μsecのパルス電圧を時間的に重複して各
個に印加すると、両パルス電圧の協同により噴出
条件に達し、記録電極８ａの部位からインク３が
噴出する。 However, to the recording electrode 8a and the control electrode 10a,
When pulse voltages with a peak value of 2 KV and a pulse width of 100 μsec, which do not meet the jetting conditions when used alone, are applied to each individual in a temporally overlapping manner, the jetting conditions are reached by the cooperation of both pulse voltages, and the ink 3 is jetted from the recording electrode 8a. do.
なお、この関係は記録電極８ｂ，８ｃと制御電
極１０ａ、記録電極８ｄ〜８ｆと制御電極１０
ｂ、記録電極８ｇ〜８ｉと制御電極１０ｃとの間
においても同様となる。 Note that this relationship holds between the recording electrodes 8b, 8c and the control electrode 10a, and between the recording electrodes 8d to 8f and the control electrode 10.
b. The same holds true between the recording electrodes 8g to 8i and the control electrode 10c.
ただし、例えば制御電極１０ａへ、単独でも噴
出条件となるパルス電圧を印加すれば、制御電極
１０ａの部位全般にわたつてインク３が噴出する
ため、記録電極１０ａ〜１０ｃへ印加するパルス
電圧の設定に十分な注意が必要となる。 However, for example, if a pulse voltage is applied alone to the control electrode 10a, which is a jetting condition, the ink 3 will be jetted out over the entire area of the control electrode 10a. Sufficient caution is required.
第４図は、前述の点を改善した実施例であり、
記録電極８ａ〜８ｉを下板１ｂの内面に設けると
共に、絶縁体１１によりインク３と絶縁して制御
電極１０ａ〜１０ｃを上板１ａの内面に設けてお
り、この場合においては、波高値2KV、パルス幅
200μsecのパルス電圧を制御電極１０ａ〜１０ｃ
へ印加しても、記録電極８ａ〜８ｉへパルス電圧
を印加しない限り、インク３の噴出が行なわれな
い。 FIG. 4 shows an embodiment that improves the above points,
Recording electrodes 8a to 8i are provided on the inner surface of the lower plate 1b, and control electrodes 10a to 10c are provided on the inner surface of the upper plate 1a, insulated from the ink 3 by an insulator 11. In this case, the peak value is 2KV, pulse width
A pulse voltage of 200 μsec is applied to the control electrodes 10a to 10c.
Even if a pulse voltage is applied to the recording electrodes 8a to 8i, the ink 3 is not ejected unless a pulse voltage is applied to the recording electrodes 8a to 8i.
第５図は、協同作用により噴出条件となるが、
各単独では噴出条件とならないパルス電圧の例を
示す波形図であり、記録電極８ａ〜８ｉへ印加す
る記録電極電圧Erと、制御電極１０ａ〜１０ｃ
へ印加する制御電極電圧Ecとを縦軸に取り、横
軸に時間Ｔを取つて示すとおり、記録電極電圧
Erの波高値が2KV、パルス幅が100μsecのＡ〜
Ｃにおいては、波高値2KVの制御電極電圧Ecを
時間的に重複して印加すれば、噴出条件に達す
る。 Figure 5 shows the conditions for eruption due to cooperative action.
FIG. 3 is a waveform diagram showing an example of a pulse voltage that does not constitute an ejection condition when used alone; the recording electrode voltage Er applied to the recording electrodes 8a to 8i and the control electrodes 10a to 10c;
As shown, the vertical axis is the control electrode voltage Ec applied to the recording electrode voltage Ec, and the horizontal axis is the time T.
A~ where Er peak value is 2KV and pulse width is 100μsec
In case C, if the control electrode voltage Ec with a peak value of 2 KV is applied overlappingly in time, the ejection condition is reached.
また、Ｄにおいては、同様の記録電極電圧Er
に対し、波高値3KVの制御電極電圧Ecを印加す
れば勿論噴出条件に達するが、制御電極電圧Ec
の単独印加では噴出条件に達しない。 In addition, in D, similar recording electrode voltage Er
On the other hand, if the control electrode voltage Ec with a peak value of 3KV is applied, the ejection condition will of course be reached, but the control electrode voltage Ec
The ejection condition cannot be reached by applying only .
一方、Ｅ，Ｆの場合は、記録電極電圧Erの波
高値を1KVへ低下させているが、制御電極電圧
Ecの波高値を3KVとすることにより、噴出条件
が得られる。 On the other hand, in the case of E and F, the peak value of the recording electrode voltage Er is lowered to 1KV, but the control electrode voltage
By setting the peak value of Ec to 3KV, the ejection conditions can be obtained.
なお、記録電極電圧Erと制御電極電圧Ecとの
重複期間は、最低数10μsecあればよく、これを
充足する条件で各パルス電圧を印加すると共に、
記録速度との関係から極力パルス幅を小さなもの
とすればよい。 Note that the overlapping period between the recording electrode voltage Er and the control electrode voltage Ec should be at least several tens of microseconds, and each pulse voltage is applied under conditions that satisfy this, and
The pulse width should be made as small as possible in view of the relationship with the recording speed.
したがつて、記録電極８ａ〜８ｉと制御電極１
０ａ〜１０ｃへ印加するパルス電圧の極性が同一
となり、従来の如く両電極間へ逆極性の電圧を印
加する場合に比し、電極間の放電により電極の破
壊を生ずるおそれが完全に回避される。 Therefore, recording electrodes 8a to 8i and control electrode 1
The polarity of the pulse voltage applied to 0a to 10c is the same, and compared to the conventional case where a voltage of opposite polarity is applied between both electrodes, the risk of electrode destruction due to discharge between the electrodes is completely avoided. .
また、記録電極８ａ〜８ｉと制御電極１０ａ〜
１０ｃとへ印加するパルス電圧の協同作用によ
り、インク３の噴出制御が行なわれるため、記録
電極８ａ，８ｄ，８ｇ、および８ｂ，８ｅ，８
ｈ、ならびに８ｃ，８ｆ，８ｉを各々群として共
通接続し、各群毎にドライバ９を設けると共に、
制御電極１０ａ〜１０ｃの各々にドライバ９を設
ければ、記録電極群と制御電極１０ａ〜１０ｃと
の選択駆動により、記録電極８ａ〜８ｉ中の所望
のものに応ずる部位からインク３を噴出させるこ
とが可能となり、第３図および第４図の例では、
記録電極８ａ〜８ｉ毎にドライバ９を設ければ、
制御電極１０ａ〜１０ｃのものを含め、ドライバ
９が計12台必要であるのに対し、前述のとおり記
録電極８ａ〜８ｉを群に分割して共通接続するこ
とにより、制御電極１０ａ〜１０ｃのものを含
め、ドライバ９が計６台となり、ドライバ９の数
を大幅に減ずることができる。なお、これはドラ
イバ９の代りにスイツチ等を用いる場合も同様で
ある。 In addition, recording electrodes 8a to 8i and control electrodes 10a to
The ejection of the ink 3 is controlled by the cooperative action of the pulse voltage applied to the recording electrodes 8a, 8d, 8g, and 8b, 8e, 8.
h, 8c, 8f, and 8i are connected in common as a group, and a driver 9 is provided for each group,
If a driver 9 is provided for each of the control electrodes 10a to 10c, the ink 3 can be ejected from a desired location among the recording electrodes 8a to 8i by selectively driving the recording electrode group and the control electrodes 10a to 10c. becomes possible, and in the examples shown in Figures 3 and 4,
If a driver 9 is provided for each recording electrode 8a to 8i,
Although a total of 12 drivers 9 are required including those for the control electrodes 10a to 10c, by dividing the recording electrodes 8a to 8i into groups and connecting them in common as described above, the number of drivers 9 for the control electrodes 10a to 10c can be reduced. Including, the number of drivers 9 is six in total, and the number of drivers 9 can be significantly reduced. Note that this also applies when a switch or the like is used instead of the driver 9.
このほか、インク噴出口５の形状、寸法および
接地導体７との間隔等に応じ、パルス電圧の波高
値およびパルス幅等を選定すればよく、記録条件
に応じて記録電極８ａ８ｉおよび制御電極１０ａ
〜１０ｃの数を定めればよい等、本発明は種々の
変形が自在である。 In addition, the peak value and pulse width of the pulse voltage may be selected depending on the shape and dimensions of the ink jet port 5, the distance from the ground conductor 7, etc., and the recording electrode 8a8i and the control electrode 10a may be selected depending on the recording conditions.
The present invention can be modified in various ways, such as by determining the number of .about.10c.
以上の説明により明らかなとおり本発明によれ
ば、電極間放電による電極破壊を生ずるおそれが
回避されると共に、ドライバ、スイツチ等の数を
大幅に減ずることができるため、インク記録用へ
ツドの駆動において顕著な効果が得られる。 As is clear from the above description, according to the present invention, the risk of electrode breakdown due to interelectrode discharge is avoided, and the number of drivers, switches, etc. can be significantly reduced, so that the ink recording head can be driven. Remarkable effects can be obtained.
第１図はインク記録用ヘツドを主体として示す
斜視図、第２図はインク噴出口側から見た斜視
図、第３図以降は本発明の実施例を示し、第３図
および第４図は第２図におけるＸ−Ｙ断面図、第
５図はパルス電圧の波形図である。
２……ヘツド部、３……インク、５……インク
噴出口、８，８ａ〜８ｉ……記録電極、９……ド
ライバ、１０ａ〜１０ｃ……制御電極、１１……
絶縁体、Er……記録電極電圧、Ec……制御電極
電圧。
Fig. 1 is a perspective view mainly showing the ink recording head, Fig. 2 is a perspective view seen from the ink jetting port side, Fig. 3 and subsequent figures show embodiments of the present invention, and Figs. FIG. 2 is an X-Y sectional view, and FIG. 5 is a pulse voltage waveform diagram. 2...Head portion, 3...Ink, 5...Ink ejection port, 8, 8a to 8i...Recording electrode, 9...Driver, 10a to 10c...Control electrode, 11...
Insulator, Er...recording electrode voltage, Ec...control electrode voltage.
Claims (1)
ト状のインク噴出口を有し、かつ、該インク噴出
口内の前記上板および下板中いずれか一方の内面
に配列された複数の記録電極と、互に隣接する前
記記録電極毎に群として分割された複数の記録電
極群と対応し前記上板および下板中いずれか他方
の内面に配列された複数の制御電極とを備え、イ
ンクに対し該インクの噴出条件となる静電力を与
えて前記インクを前記インク噴出口から噴出させ
るインク記録用ヘツドにおいて、各単独では前記
噴出条件とはならずかつ協同作用により前記噴出
条件となるパルス電圧を前記記録電極と制御電極
とへ時間的に重複して各個に印加し、前記記録電
極と制御電極とへ印加された前記各パルス電圧の
協同作用により、前記パルス電圧の印加された前
記記録電極の部位から前記インクの噴出を行なわ
せることを特徴とするインク記録用ヘツドの駆動
方法。1. A slit-shaped ink ejection port consisting of an upper plate and a lower plate facing each other, and a plurality of recording electrodes arranged on the inner surface of either the upper plate or the lower plate within the ink ejection port. , comprising a plurality of recording electrode groups divided into groups for each of the recording electrodes adjacent to each other and a plurality of control electrodes arranged on the inner surface of the other of the upper plate and the lower plate; In an ink recording head that ejects the ink from the ink ejection port by applying an electrostatic force that serves as the ejection condition for the ink, a pulse voltage that does not individually provide the ejection condition but cooperates to provide the ejection condition. The pulse voltages are applied to the recording electrode and the control electrode overlappingly in time, and due to the cooperative action of the pulse voltages applied to the recording electrode and the control electrode, the pulse voltage is applied to the recording electrode to which the pulse voltage is applied. A method for driving an ink recording head, characterized in that the ink is ejected from a portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10282680A JPS5727760A (en) | 1980-07-26 | 1980-07-26 | Driving method of ink recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10282680A JPS5727760A (en) | 1980-07-26 | 1980-07-26 | Driving method of ink recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5727760A JPS5727760A (en) | 1982-02-15 |
| JPS6135955B2 true JPS6135955B2 (en) | 1986-08-15 |
Family
ID=14337819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10282680A Granted JPS5727760A (en) | 1980-07-26 | 1980-07-26 | Driving method of ink recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5727760A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9601226D0 (en) * | 1996-01-22 | 1996-03-20 | The Technology Partnership Plc | Ejection apparatus and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637163A (en) * | 1979-09-04 | 1981-04-10 | Nippon Telegr & Teleph Corp <Ntt> | Recording head for ink jet |
| JPS5640564A (en) * | 1979-09-11 | 1981-04-16 | Ricoh Co Ltd | Ink jet recording device |
-
1980
- 1980-07-26 JP JP10282680A patent/JPS5727760A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637163A (en) * | 1979-09-04 | 1981-04-10 | Nippon Telegr & Teleph Corp <Ntt> | Recording head for ink jet |
| JPS5640564A (en) * | 1979-09-11 | 1981-04-16 | Ricoh Co Ltd | Ink jet recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5727760A (en) | 1982-02-15 |
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