JPS5914969A - Liquid jet recorder - Google Patents
Liquid jet recorderInfo
- Publication number
- JPS5914969A JPS5914969A JP12377982A JP12377982A JPS5914969A JP S5914969 A JPS5914969 A JP S5914969A JP 12377982 A JP12377982 A JP 12377982A JP 12377982 A JP12377982 A JP 12377982A JP S5914969 A JPS5914969 A JP S5914969A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- temperature
- level
- liquid temperature
- pulse
- 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
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
- B41J2/04528—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at warming up the head
-
- 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
- B41J2/04531—Control methods or devices therefor, e.g. driver circuits, control circuits controlling a head having a heater in the manifold
-
- 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
- B41J2/0458—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on heating elements forming bubbles
Abstract
Description
【発明の詳細な説明】
本発明は、液体噴射記録装置に関し、特に電気熱エネル
ギー変換素子を用いて液体を加熱し液滴を噴射させるよ
うにした記録装置において、液体温度が低いような場合
にあっても常に安定した均一な液体噴射がなされ高品質
の画像が得られるように図ったものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid jet recording device, and particularly to a recording device that uses an electrothermal energy conversion element to heat a liquid and jet droplets, when the temperature of the liquid is low. This is designed to ensure that even if there is a problem, a stable and uniform liquid jet is always made and a high quality image can be obtained.
液体噴射記録装置はノンインパクトプリンタとしての低
騒音性と共に高密度高品質の画像が得られることや高速
記録が可能でカラープリントに適していること等種々の
点で優れた特性を有する記録装置の一つである。従来の
この種液体噴射記録装置にあっては、その記録ヘッドに
液滴を噴射させるために電気・熱エネルギー変換素子が
設けられていて、この素子に電気信号を印加することに
より液を加熱して液中に気泡を発生させ、素子から下流
側の液を液滴にして記録紙に向けて飛翔させて弾着した
ドツトにより画像を形成するように構成されている。The liquid jet recording device is a recording device that has excellent characteristics in various respects, such as low noise as a non-impact printer, the ability to obtain high-density, high-quality images, high-speed recording, and suitability for color printing. There is one. In conventional liquid jet recording devices of this kind, an electrical/thermal energy conversion element is provided to cause the recording head to jet droplets, and the liquid is heated by applying an electrical signal to this element. The device is configured to generate air bubbles in the liquid, make the liquid downstream from the element into droplets, fly them toward the recording paper, and form an image with the dots that land on the recording paper.
しかしながら、従来のこの種の液体記録装置においては
、噴射される液体の温度について何んらの制御もなされ
ておらず、外気温度によって液体の温度が左右される。However, in this type of conventional liquid recording device, there is no control over the temperature of the ejected liquid, and the temperature of the liquid is influenced by the outside air temperature.
しかして、液体には低温になるとその粘度と共に表面張
力が第１図に示すように著しく増加する傾向があり、た
めに液滴の径か小さくなり、ときにはサテライトやスプ
ラッシュ現象を起したり液体噴射が不可能な状態に陥っ
たりする。However, when a liquid becomes cold, its viscosity and surface tension tend to increase significantly as shown in Figure 1, which causes the droplet diameter to become smaller, sometimes causing satellite or splash phenomena or liquid jets. may become impossible.
本発明の目的は、上述の点に鑑みてなされたもので、液
体の温度が低温のときは飛翔液滴を形成させない限界内
で熱エネルギーを電気・熱エネルギー変換素子から液に
供給するようにして液体温度を噴射に備えて好適な湿度
に保ち、常に良好な記録が得られるようにした液体噴射
記録装置を提供することにある。An object of the present invention has been made in view of the above-mentioned points, and is to supply thermal energy from an electric/thermal energy conversion element to a liquid within a limit that prevents the formation of flying droplets when the temperature of the liquid is low. It is an object of the present invention to provide a liquid jet recording device in which the temperature of the liquid is maintained at a suitable humidity in preparation for jetting, and good recording can always be obtained.
以下に、図面に基づいて本発明の詳細な説明する。The present invention will be described in detail below based on the drawings.
第一図は本発明の一実施例を示し、ここでｌは液体噴射
記録ヘッドであり、λはヘッドｌに設けた液供給室であ
る。液はこの記録ヘッドｌの外部に設けた図示しない液
体貯蔵槽から供給０３を介してこの液供給室コに補給さ
れ、供給室コの開口ｌから液流路りによりヘッド／の先
端部に設けたオリフィス６へと導かれる。７は液流路３
に設けた電気・熱エネルギー変換素子（以下でヒータと
いう）であり、ヒータ基板の一部を流路ｊに露出させる
ことによりヒータクを形成する。更に、ざは液供給室−
の底部に配設した温度検出器であり、この温度検ｔＢ器
ざにより検出された湿度の高低を後述する制御回路で判
断してヒータクを制御する。FIG. 1 shows an embodiment of the present invention, where l is a liquid jet recording head and λ is a liquid supply chamber provided in the head l. Liquid is supplied to this liquid supply chamber via a supply 03 from a liquid storage tank (not shown) provided outside the recording head l, and is provided at the tip of the head via a liquid flow path from an opening l of the supply chamber l. is guided to the orifice 6. 7 is liquid flow path 3
This is an electrical/thermal energy conversion element (hereinafter referred to as a heater) provided in the heater substrate, and a heater is formed by exposing a part of the heater substrate to the flow path j. In addition, the liquid supply chamber
This is a temperature detector disposed at the bottom of the temperature sensor, and a control circuit, which will be described later, determines the level of humidity detected by this temperature sensor and controls the heater.
第３図は本発明記録装置に設ける制御回路の一例を示す
もので、本例では温度検出器ｔをサーミスタとし、第り
図に示すようなサーミスタｇの温度変化に対応する抵抗
値の変化を利用して、ヒータクを温度制御する。すなわ
ち、液供給室−における液温が高いとサーミスタｔの抵
抗値が低い値となり、液温か低いとサーミスタＳの抵抗
値が高い値となることを利用する。すなわち、サーミス
タざと抵抗／／Ａ、／／Ｂおよび／／Ｃとを図に示すよ
うに接続して電圧Ｖを印加し、サーミスタざと抵抗／ｌ
Ｃとの接続点ＣＡおよび抵抗／／Ａと／／Ｂとの接続点
ＣＢを比較器／コの（−）個入力端子および（＋）個入
力端子にそれぞれ接続して抵抗／／Ｂおよび／／Ｃの他
方の端子を接地する。しかして、液体の温度が噴射に支
障のない所定温度以上のときはサーミスタｇの抵抗値が
低くなることにより比較器／コからの出力電圧が”Ｌ″
レベルなり、液体の温度か所定温度に未たないときはサ
ーミスタｇの抵抗値が高くなることにより比較器ｌコか
らの出力電圧が１Ｈ”レベルとなるように抵抗／／Ａ、
／／Ｂおよび／／Ｃの抵抗値を設定しておく。FIG. 3 shows an example of a control circuit provided in the recording apparatus of the present invention. In this example, the temperature detector t is a thermistor, and the change in resistance value corresponding to the temperature change of the thermistor g as shown in FIG. Use this to control the temperature of the heater. That is, it utilizes the fact that when the liquid temperature in the liquid supply chamber is high, the resistance value of the thermistor t becomes a low value, and when the liquid temperature is low, the resistance value of the thermistor S becomes a high value. That is, the thermistor gap and resistance //A, //B, and //C are connected as shown in the figure, voltage V is applied, and the thermistor gap and resistance /l are connected as shown in the figure.
Connection point CA with C and connection point CB between resistors //A and //B are connected to (-) input terminals and (+) input terminals of comparator /, respectively, and resistors //B and /B are connected. Ground the other terminal of /C. Therefore, when the temperature of the liquid is above a predetermined temperature that does not interfere with injection, the resistance value of thermistor g becomes low, and the output voltage from the comparator/g becomes "L".
level, and when the temperature of the liquid does not reach the predetermined temperature, the resistance value of thermistor g increases, so that the output voltage from the comparator l becomes the 1H" level.
Set the resistance values of //B and //C.
／３はパルス発生器であり、印字周期に同調して液温を
高めるに必要なだけの時間幅を持ったパルス列がアンド
ゲート／りに供給されているが、比較器／コからアンド
ゲート／４Ｉへの出力電圧が″Ｌ’″レベルである限り
、すなわち液温が所定の温度以上に保たれている限りは
パルス発生器／３からのパルス信号の出力があってもト
ランジスタ１３のベースにはベース電圧が供給されず、
従ってトランジスタ／４１７１ヘースに供給される印字
パルスＩＩＥ圧（ｉ’）タイミングに合わせてヒータク
に液体噴射用の高電圧ＶＨが印加される。/3 is a pulse generator, and a pulse train with a time width necessary to raise the liquid temperature in synchronization with the printing cycle is supplied to the AND gate/2 from the comparator /3. As long as the output voltage to 4I is at the "L'" level, that is, as long as the liquid temperature is maintained at a predetermined temperature or higher, even if there is a pulse signal output from the pulse generator/3, the base of the transistor 13 is not supplied with base voltage,
Therefore, the high voltage VH for liquid jetting is applied to the heater in accordance with the timing of the printing pulse IIE pressure (i') supplied to the transistor/4171 base.
更に蓋た、液体温度が所定の温度にみたないときは、比
較器／、２から１Ｈ″レベルの出力電圧がアンドゲート
／４（に供給されるので、アンドゲート／４’Ｃオ ）
からはパルス発生器／３からのパルス出力時にトランジ
スタ／、５−のベースに出力電圧を供給し、トランジス
タ／Ｓはそのパルス出力のパルス幅に見合った時間だけ
導通してダイオード゛／ｇを介してヒータ７に低電圧Ｖ
Ｌを送給してヒータ７を加熱し、液温を噴射に支障のな
い所定温度にまで高めることができる。以て、トランジ
スタ／６では印字パルス信号がベースに供給されるタイ
ミングに合わせて高電圧ＶＨをヒータ７に印加し、好適
な液温状態のもとでヘッドｌに良好な液体噴射を行わせ
ることができる。Furthermore, when the liquid temperature does not reach the predetermined temperature, an output voltage of 1H'' level is supplied from the comparator/2 to the AND gate/4 (and therefore, from the AND gate/4'C). When a pulse is output from the pulse generator /3, an output voltage is supplied to the base of the transistor /, 5-, and the transistor /S becomes conductive for a time corresponding to the pulse width of the pulse output, and is connected to the heater via the diode /g. 7 to low voltage V
By feeding L to heat the heater 7, the liquid temperature can be raised to a predetermined temperature that does not hinder injection. Therefore, in the transistor /6, high voltage VH is applied to the heater 7 in synchronization with the timing when the print pulse signal is supplied to the base, so that the head 1 can perform good liquid jetting under a suitable liquid temperature condition. Can be done.
第３図は複数のヘッドすなわちマルチヘッドを有する液
体噴射記録装置に本発明を適用した実施例を示し、ここ
では、トランジスタ１５のエミッタ側を、並列に設けた
噴射用トランジスタ／Ａ Ａ 、 ／ＡＢ。FIG. 3 shows an embodiment in which the present invention is applied to a liquid jet recording apparatus having a plurality of heads, that is, a multi-head. .
・・・の各エミッタ側と、それぞれのダイオード／ｇＡ
／ｌ； Ｂ 、・・・を介して接続する。７Ａ、７Ｂ、
・・・は各ヘッドに設けたヒータである。その他の構成
については第３図と同様であり、その動作については、
各ヘッド毎に上述したようにしてヒータクＡ、７Ｂ。Each emitter side of ... and each diode/gA
/l; Connect via B, . 7A, 7B,
... is a heater provided in each head. The rest of the configuration is the same as in Figure 3, and its operation is as follows:
Heaters A and 7B are applied to each head as described above.
（Ａ）
・・・への加熱が行われるものであり、その説明を省略
する。(A) . . . is heated, and its explanation will be omitted.
以上説明してきたように、本発明によれば、液体が噴射
に不適な低温状態の場合に、液体噴射用の電気・熱エネ
ルギー変換素子を用いて噴射に支障のない所定温度にま
で加熱するようにしたので、外気温度の低いような状態
にあっても好適な温度で均一な安定した液体噴射を行う
ことができ、常に良好な記録を得ることができる。As explained above, according to the present invention, when the liquid is in a low temperature state that is unsuitable for jetting, it is possible to heat the liquid to a predetermined temperature that does not hinder jetting using an electrical/thermal energy conversion element for liquid jetting. Therefore, even when the outside temperature is low, uniform and stable liquid jetting can be performed at a suitable temperature, and good records can always be obtained.
第１図は液体噴射記録装置に使用する液体の表面張力と
温度との関係を示す特性曲線図、第一図は本発明液体噴
射記録装置におけるヘッドの構成の一例を示す斜視図、
第３図は本発明液体記録装置における制御回路の構成の
一例を示す回路図、第り図はサーミスタにおける温度と
抵抗値の関係を示す特性曲線図、第３図は本発明の他の
実施例として制御回路の構成の一例を示す回路図である
。
／・・・記録ヘッド、
コ・・・液供給室、
３・・・供給口、
ダ・・・開 口、
３・・・液流路、
６・・・オリアイス、
？、 ７Ａ、 ７Ｂ・・・電気・熱エネルギー変換素子
、ｇ・・・温度検出器、
／／Ａ、 ／／Ｂ、 ／／Ｃ・・・抵抗、／コ・・・比
較器、
１３・・・パルス発生器、
／４１・・・アンドゲート、
／ｊ、 ／Ａ、 ／ＡＡ、 ／７Ｂ・・・トランジスタ
、／ざ、 ／ｌＡ、 ／ｌＢ・・・ダイオード。
特許出願人 キャノン株式会社
第２図FIG. 1 is a characteristic curve diagram showing the relationship between the surface tension and temperature of a liquid used in a liquid jet recording device, and FIG. 1 is a perspective view showing an example of the structure of a head in the liquid jet recording device of the present invention.
FIG. 3 is a circuit diagram showing an example of the configuration of a control circuit in a liquid recording device of the present invention, FIG. 3 is a characteristic curve diagram showing the relationship between temperature and resistance value in a thermistor, and FIG. 3 is another embodiment of the present invention. FIG. 2 is a circuit diagram showing an example of the configuration of a control circuit. /... Recording head, C... Liquid supply chamber, 3... Supply port, D... Opening, 3... Liquid flow path, 6... Oriice, ? , 7A, 7B... Electric/thermal energy conversion element, g... Temperature detector, //A, //B, //C... Resistor, /Co... Comparator, 13... Pulse generator, /41...AND gate, /j, /A, /AA, /7B...transistor, /Z, /lA, /lB...diode. Patent applicant Canon Co., Ltd. Figure 2
Claims (1)
変換素子に電気信号を供給することにより液体を加熱し
て液滴を形成し、前記オリフィスから噴射するようにし
た液体噴射記録装置において、前記液体の温度検出手段
と、該温度検出手段によって検出された温度に基づいて
、前記液体を前記液滴に形成させない限界内に保つよう
に前記電気・熱変換素子を制御する手段とを設けたこと
を特徴とする液体噴射記録装置。In a liquid jet recording device having an orifice, the liquid is heated to form droplets by supplying an electric signal to an electric/thermal energy conversion element provided in a liquid flow path, and the droplets are jetted from the orifice, Temperature detection means for the liquid; and means for controlling the electrothermal conversion element to keep the liquid within a limit that prevents the formation of droplets based on the temperature detected by the temperature detection means. A liquid jet recording device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12377982A JPS5914969A (en) | 1982-07-17 | 1982-07-17 | Liquid jet recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12377982A JPS5914969A (en) | 1982-07-17 | 1982-07-17 | Liquid jet recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5914969A true JPS5914969A (en) | 1984-01-25 |
Family
ID=14869072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12377982A Pending JPS5914969A (en) | 1982-07-17 | 1982-07-17 | Liquid jet recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5914969A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0205243A2 (en) * | 1985-06-10 | 1986-12-17 | Ing. C. Olivetti & C., S.p.A. | Control apparatus for an on-demand ink jet printing element |
| JPS6255265A (en) * | 1985-09-05 | 1987-03-10 | Fuji Heavy Ind Ltd | Motor control of electrical power steering device |
| US4791435A (en) * | 1987-07-23 | 1988-12-13 | Hewlett-Packard Company | Thermal inkjet printhead temperature control |
| US5767872A (en) * | 1995-07-04 | 1998-06-16 | Olivetti-Canon Industriale S.P.A. | Ink jet printhead thermal working conditions stabilization method |
| US5774147A (en) * | 1988-07-26 | 1998-06-30 | Canon Kabushiki Kaisha | Substrate having a common collector region and being usable in a liquid jet recording head |
-
1982
- 1982-07-17 JP JP12377982A patent/JPS5914969A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0205243A2 (en) * | 1985-06-10 | 1986-12-17 | Ing. C. Olivetti & C., S.p.A. | Control apparatus for an on-demand ink jet printing element |
| JPS6255265A (en) * | 1985-09-05 | 1987-03-10 | Fuji Heavy Ind Ltd | Motor control of electrical power steering device |
| US4791435A (en) * | 1987-07-23 | 1988-12-13 | Hewlett-Packard Company | Thermal inkjet printhead temperature control |
| JPS6438246A (en) * | 1987-07-23 | 1989-02-08 | Hewlett Packard Yokogawa | Thermal ink jet printer control system |
| US5774147A (en) * | 1988-07-26 | 1998-06-30 | Canon Kabushiki Kaisha | Substrate having a common collector region and being usable in a liquid jet recording head |
| US5767872A (en) * | 1995-07-04 | 1998-06-16 | Olivetti-Canon Industriale S.P.A. | Ink jet printhead thermal working conditions stabilization method |
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