JP2692846B2 - Recording device - Google Patents
Recording deviceInfo
- Publication number
- JP2692846B2 JP2692846B2 JP63086815A JP8681588A JP2692846B2 JP 2692846 B2 JP2692846 B2 JP 2692846B2 JP 63086815 A JP63086815 A JP 63086815A JP 8681588 A JP8681588 A JP 8681588A JP 2692846 B2 JP2692846 B2 JP 2692846B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- temperature
- recording head
- head
- image
- 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 - Lifetime
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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/377—Cooling or ventilating arrangements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は記録装置に関し、更に詳しくは熱エネルギー
を利用して記録を行なう記録装置に関する。The present invention relates to a recording apparatus, and more particularly to a recording apparatus that records by utilizing thermal energy.
従来より各種方式を用いた記録装置は知られている。
中でも、例えば、バブルジェット記録方式に代表される
ような、熱エネルギーを利用して液体を吐出させ、該吐
出された液体を記録媒体に付着させて記録を行なう記録
方法を用いた記録装置は構成が簡単で、かつカラー化が
容易である等多くの利点を有しているため、その将来性
が有望視されている。Conventionally, recording apparatuses using various methods are known.
Among them, for example, a recording apparatus using a recording method, in which a liquid is ejected by utilizing thermal energy and the ejected liquid is adhered to a recording medium to perform recording, as represented by a bubble jet recording method, is configured. Since it has many advantages such as simpleness and easy colorization, its future potential is expected.
又、上記したバブルジエツト記録方式を利用したイン
クジエツト記録ヘツドを用いて、特にカラー記録化、高
速記録化等を行なう場合には、複数個の記録ヘツドを記
録装置内に配設することも多く行なわれている。Further, when an ink jet recording head utilizing the above-mentioned bubble jet recording method is used, especially when color recording or high speed recording is performed, it is often the case that a plurality of recording heads are arranged in the recording device. ing.
この種の熱エネルギーを記録エネルギーとした記録ヘ
ツド、例えば、バブルジエツト方式による記録ヘツドを
複数個搭載した記録装置では、制御装置から各記録ヘツ
ドの熱エネルギー発生源たる電気熱変換体に送られてく
る画像記録信号に応じて各記録ヘツドが記録を行なう場
合、各記録ヘツド毎に電気熱変換体での発熱量の差異が
生じることがある。In a recording device having a plurality of recording heads using this kind of thermal energy as recording energy, for example, a recording device having a bubble jet method, the control device sends the recording head to an electrothermal converter which is a heat energy generating source of each recording head. When each recording head performs recording according to an image recording signal, the amount of heat generated by the electrothermal converter may differ for each recording head.
この各記録ヘツドの電気熱変換体の発熱量の差異は各
記録ヘツド間の温度差としてあらわれる。インクジエツ
ト記録の場合ヘツド温度の差異は記録用インクの温度の
差異となり、つまりは各ヘツド間のインク粘度に差異が
生じることになり、各ヘツド間のインク吐出量がばらつ
き、その結果濃度差として画像のむらが引き起こす要因
となる。The difference in the amount of heat generated by the electrothermal converters of the recording heads appears as a temperature difference between the recording heads. In the case of ink jet recording, the difference in the head temperature causes the difference in the temperature of the recording ink, that is, the difference in the ink viscosity between the heads causes a variation in the ink ejection amount between the heads, and as a result, a difference in image density It is a factor that causes unevenness.
時に異なる色のインク毎に設けた記録ヘツドによりフ
ルカラー記録を行なう場合、各色ヘツドの温度が変動し
てヘツド間の温度差が大となると、温度差だけでなくカ
ラーバランスの変動が生じ、安定したカラー画像を得る
ことが困難となる。When full-color recording is performed with recording heads provided for inks of different colors, if the temperature of each color head fluctuates and the temperature difference between the heads becomes large, not only the temperature difference but also the color balance fluctuates and stabilizes. It becomes difficult to obtain a color image.
又、1つの記録ヘツドについてみても、記録ヘツドの
電気熱変換体の発生する熱エネルギーが記録用インクに
伝達され記録用インクの温度が上昇してしまうと、記録
用インク内の溶存気泡の析出が生じてしまう場合があ
る。このような溶存気泡の析出が生じると、画像記録信
号に応じて発生する気泡による吐出エネルギーが充分に
記録用インクに伝わらず、液体の吐出不良や不吐出を生
じる場合がある。Also, regarding one recording head, when the thermal energy generated by the electrothermal converter of the recording head is transferred to the recording ink and the temperature of the recording ink rises, the dissolved bubbles in the recording ink are deposited. May occur. When such dissolved bubbles are deposited, the ejection energy due to the bubbles generated in accordance with the image recording signal may not be sufficiently transmitted to the recording ink, which may cause ejection failure or non-ejection of the liquid.
そこで、従来より記録ヘツドが所望の温度以上の温度
(設定温度)の範囲の上限を越えた場合、送風フアンを
動作させて記録ヘツドを冷却することにより上記した様
な問題の発生を解消させることが提案されている。Therefore, conventionally, when the recording head exceeds the upper limit of the temperature range (set temperature) higher than a desired temperature, an air blower fan is operated to cool the recording head to eliminate the above problems. Is proposed.
ところで、真青な空や夕焼け等の画像として一般的で
あり、かつ、記録面積の多くの面積を占める様な種類の
画像の記録状態の時、中でも上記した真青な空や夕焼け
等、感覚的に人間が記憶している様な画像の記録を行な
う場合は、わずかな画像ムラでも、画像品質は悪化して
見えてしまうという問題がある。By the way, when recording a type of image that is common as an image of a deep blue sky or sunset and that occupies a large area of the recording area, the above-mentioned deep blue sky, sunset, etc. In the case of recording an image that is memorized by humans, there is a problem that even a slight image unevenness causes the image quality to be deteriorated and appear.
送風フアン等を用いて記録ヘツドの冷却を行なう場
合、上記した様な画像記録を行なう場合は、往々にして
記録ヘツドが設定温度の上限を越えてしまうことが多
い。この場合には、当然送風フアンは駆動状態が続けら
れることになる。When the recording head is cooled using a blower fan or the like, when the image recording as described above is performed, the recording head often exceeds the upper limit of the set temperature. In this case, the blower fan will naturally continue to be driven.
特に、シリアルスキャンタイプの記録方式で記録を行
う場合、記録ヘッドの往方向のスキャンで記録を行った
後の記録ヘッドのリターン時にも送風ファンの駆動が行
われると、印字動作を行わないリターン時に記録ヘッド
が過剰に冷却されてしまい、1走査の最初の部分と最後
の部分との間で記録用インクの温度が変化してしまうた
め、記録画像に濃度ムラが生じてしまう。In particular, when printing with the serial scan type printing method, if the blower fan is driven even when the print head returns after printing with the scan in the forward direction of the print head, the printing operation is not performed at the time of return. The print head is excessively cooled, and the temperature of the print ink changes between the first portion and the last portion of one scan, resulting in density unevenness in the printed image.
また、記録開始時の記録ヘッドの温度が高くなってい
ないときに送風ファンを駆動し続けることによっても、
同様に記録ヘッドが過剰に冷却され、記録開始時点と記
録終了時点におけるインクの温度の変化が大きくなり、
濃度ムラを生じてしまう。Also, by continuing to drive the blower fan when the temperature of the recording head at the start of recording is not high,
Similarly, the recording head is excessively cooled, and the change in the ink temperature between the recording start point and the recording end point becomes large,
This causes density unevenness.
この様な画像ムラは、記録された画像の品質を低下さ
せる一因となっていた。Such image unevenness has been one of the causes of lowering the quality of recorded images.
特に上記した様な記録画像の観賞者にとって良く記憶
されている様な画像の場合には、このわずかな色ムラも
大きな問題となっていた。In particular, in the case of an image which is well remembered by the viewer of the recorded image as described above, this slight color unevenness has been a serious problem.
本発明は、より一層高品位の記録画像を得ることを目
的とする。It is an object of the present invention to obtain a higher quality recorded image.
又、本発明は、記録画像の濃度ムラのない記録画像を
得る記録装置を提供することを目的とする。It is another object of the present invention to provide a recording device that obtains a recorded image without density unevenness of the recorded image.
上記目的を達成するために本発明の記録装置は、熱エ
ネルギーを利用して吐出口よりインクを吐出して記録媒
体上に記録を行うための記録ヘッドと、前記記録ヘッド
を前記記録媒体に沿って往復移動させる移動手段と、前
記移動手段による前記記録ヘッドの往方向の移動中に前
記記録ヘッドによる記録動作を行い、前記記録ヘッドの
復方向の移動は記録動作を伴わないリターン動作を行う
記録制御手段とを備える記録装置において、前記該記録
ヘッドの温度を検出する温度検出手段と、前記記録ヘッ
ドの冷却を行う送風手段と、前記温度検出手段により検
出される前記記録ヘッドの温度が所定の温度以上のとき
であって前記記録ヘッドの往方向の移動中のときに前記
送風手段を駆動するとともに、前記リターン動作中は前
記送風手段の駆動を停止させる制御手段とを備えること
を特徴とする。In order to achieve the above-mentioned object, a recording apparatus of the present invention comprises a recording head for recording on a recording medium by ejecting ink from an ejection port by using thermal energy, and the recording head along the recording medium. And a moving means for reciprocating the recording head, and a recording operation by the recording head while the recording head is moving in the forward direction by the moving means, and a return operation without recording operation is performed when the recording head moves in the backward direction. In a recording apparatus including a control unit, a temperature detection unit that detects the temperature of the recording head, a blowing unit that cools the recording head, and a temperature of the recording head that is detected by the temperature detection unit have a predetermined value. The air blowing unit is driven when the temperature is equal to or higher than the temperature and the recording head is moving in the forward direction, and the air blowing unit is driven during the return operation. Characterized in that it comprises a control means for causing locked.
以下、図面を参照して本発明を説明する。 Hereinafter, the present invention will be described with reference to the drawings.
なお、以下では本発明をバブルジエツト方式によるイ
ンクジエツト記録装置に適用する場合について例示す
る。In the following, a case where the present invention is applied to an ink jet recording apparatus of a bubble jet system will be exemplified.
第1図は本発明インクジエツト記録装置の一構成例を
示す。ここで、1はキヤリツジ2に搭載した記録ユニツ
トであり、電気熱変換体に画像記録信号に応じたパルス
電圧が印加され、当該電気熱変換体から発生した熱エネ
ルギーにより発泡を生ぜしめて吐出口よりインクを吐出
させる複数の記録ヘツド3を有している。FIG. 1 shows a structural example of the ink jet recording apparatus of the present invention. Here, 1 is a recording unit mounted on the carriage 2, and a pulse voltage corresponding to an image recording signal is applied to the electrothermal converter, and thermal energy generated from the electrothermal converter causes foaming to be generated from the discharge port. It has a plurality of recording heads 3 for ejecting ink.
第2図は記録ユニツト1を拡大して示すもので、各記
録ヘツド3には、温度検出手段4およびヒータ5を配設
してある。本例では、記録ユニツト1は4個の記録ヘツ
ド3a,3b,3c,3dから成り、それぞれを例えば、イエロ
ー、マゼンタ、シアン、ブラツクに対応させることがで
きる。FIG. 2 is an enlarged view of the recording unit 1. Each recording head 3 is provided with a temperature detecting means 4 and a heater 5. In this example, the recording unit 1 is composed of four recording heads 3a, 3b, 3c and 3d, which can correspond to, for example, yellow, magenta, cyan and black.
温度検出手段4としては、温度IC、サーミスタ、熱電
対、バリスタなどが使用可能である。また、ヒータ5と
しては、例えば、パワートランジスタあるいは発熱素子
を使用することができる。As the temperature detecting means 4, a temperature IC, a thermistor, a thermocouple, a varistor or the like can be used. Moreover, as the heater 5, for example, a power transistor or a heating element can be used.
再び第1図を参照するに、7は記録ヘツド3a〜3dに対
して設けた例えばフアン形態の送風手段であり、これを
駆動することによりヘツドユニツト1を冷却可能であ
る。13は紙送りモータであり、この紙送りモータ13の駆
動に応じて用紙等の記録媒体Pはモータ13の軸に結合し
たローラ12により、図中f方向に搬送される。ローラ14
はローラ12と協動して記録媒体Pを平坦に規制し、記録
ユニツト1に対する記録面を形成するためのローラであ
る。Referring again to FIG. 1, reference numeral 7 is a fan-shaped air-blowing means provided for the recording heads 3a to 3d, and the head unit 1 can be cooled by driving it. Reference numeral 13 denotes a paper feed motor, and a recording medium P such as a paper is conveyed in a direction f in the figure by a roller 12 connected to a shaft of the motor 13 according to the drive of the paper feed motor 13. Roller 14
Is a roller which cooperates with the roller 12 to regulate the recording medium P to be flat and form a recording surface for the recording unit 1.
15はキヤリツジ2を固定したキヤリツジ駆動用のベル
ト、16はそのベルト14を図中S方向に駆動するモータ、
18はキヤリツジ2のガイドレールである。すなわち、キ
ヤリツジ2はモータ16の駆動に応じてガイドレール18に
沿って図中S方向に移動し、記録面に対する記録を行う
ことができる。Reference numeral 15 is a belt for driving the carriage fixing the carriage 2, 16 is a motor for driving the belt 14 in the S direction in the figure,
Reference numeral 18 is a guide rail of the carriage 2. That is, the carriage 2 moves in the S direction in the drawing along the guide rail 18 in response to the driving of the motor 16, and recording can be performed on the recording surface.
20は記録ユニツト1のホーム位置Hで、前記記録ユニ
ツト1の各記録ヘツド3の吐出口と対向する位置に設け
られ、前記吐出口からのインクの吸引や強制排出された
インクを受けるため、あるいは前記吐出口を保護するた
めに設けられる回復手段である。本図では詳細について
は省略するが、一般にはキヤツピング位置等が知られて
いる。Reference numeral 20 denotes a home position H of the recording unit 1, which is provided at a position facing the ejection port of each recording head 3 of the recording unit 1 to receive the ink sucked from the ejection port or the forcedly ejected ink, or The recovery means is provided to protect the discharge port. Although details are omitted in this figure, the capping position and the like are generally known.
また、前記した温度検出手段4の検出信号は後述する
第3図示の制御装置へ入力され、制御装置9はこの温度
信号に基づいてヒータ5および送風手段7の駆動を制御
し、もって各記録ヘツドの温度を適切に設定した温度範
囲に収めるようにする。Further, the detection signal of the temperature detecting means 4 described above is input to a control device shown in FIG. 3 which will be described later, and the control device 9 controls the driving of the heater 5 and the blowing means 7 based on this temperature signal, and thus each recording head. Make sure that the temperature of is within the properly set temperature range.
第3図は第1図示の装置に適用可能な制御系の一構成
例を示すブロツク図である。各記録ヘツド3の温度検出
手段4の出力信号は変換増幅器8AおよびA/D変換器8を
介して各記録ヘツドの現在温度のデジタルデータとして
制御装置(制御手段)9に取り込まれる。一方、制御装
置9からは記録ヘツド部分が低温で加熱を要するときは
ヒータ駆動回路10を介してヒータ5へ、高温で冷却を要
するときは送風手段7へ駆動信号が発せられる。FIG. 3 is a block diagram showing a structural example of a control system applicable to the apparatus shown in FIG. The output signal of the temperature detecting means 4 of each recording head 3 is taken into the control device (control means) 9 as digital data of the current temperature of each recording head through the conversion amplifier 8A and the A / D converter 8. On the other hand, the controller 9 issues a drive signal to the heater 5 via the heater drive circuit 10 when the recording head portion needs to be heated at a low temperature, and to the blower 7 when a recording head portion needs to be cooled at a high temperature.
制御装置(制御手段)9は、後述する処理手段等に従
って制御動作を行うCPU、その処理手段に対応したプロ
グラムその他の固定データを格納したROMおよび作業用
のRAM等を有するマイクロコンピユータの形態とするこ
とができる。The control device (control means) 9 is in the form of a microcomputer having a CPU that performs control operations according to the processing means described later, a ROM that stores programs and other fixed data corresponding to the processing means, and a working RAM. be able to.
次に、第4図を参照しながら上述した熱を記録エネル
ギーとしたインクジエツト記録装置における記録ヘツド
の温度制御方法について説明する。Next, a method of controlling the temperature of the recording head in the ink jet recording apparatus using heat as the recording energy will be described with reference to FIG.
第4図は本例に係る制御動作のアルゴリズムを示し、
T1,T2およびT3はそれぞれ設定温度範囲の上限値、中
心値および下限値である。第4図から明らかなように、
ヘツド温度が低温から高温へ変化する場合と、高温から
低温へ変化する場合とでヒータ5および送風手段7のオ
ン/オフ設定温度を変えヒステリシスを持たせている。
これは、記録ヘツド3の中心温度を常にT2となるよう
に制御するのは困難であることから、設定温度範囲に応
じて上限値T1、下限値T3を設定し、その設定温度範囲
にヘツド温度を制御するためである。この時、ヘツド温
度変化による温度変化をさらに小さくするために本発明
では、ヘツド温度が上限値T1以上にあり送風手段7が
動作している場合、キヤリツジ2が印字の動作中、或は
往時には送風手段7を駆動し、印字終了後キヤリツジ2
がホームポジシヨンHへ復帰する時(復時)には送風手
段7は停止させる。FIG. 4 shows an algorithm of control operation according to this example,
T 1 , T 2 and T 3 are the upper limit value, the center value and the lower limit value of the set temperature range, respectively. As is clear from FIG.
Hysteresis is provided by changing the on / off set temperatures of the heater 5 and the blowing means 7 depending on whether the head temperature changes from low temperature to high temperature or from high temperature to low temperature.
This is because it is difficult to control the central temperature of the recording head 3 to always be T 2. Therefore, the upper limit value T 1 and the lower limit value T 3 are set according to the set temperature range, and the set temperature range is set. This is to control the head temperature. At this time, in order to further reduce the temperature change due to the head temperature change, according to the present invention, when the head temperature is equal to or higher than the upper limit value T 1 and the air blowing means 7 is operating, the carriage 2 is in the printing operation or the forward movement. Occasionally, the air blower 7 is driven to carry the carriage 2 after printing is completed.
When the vehicle returns to the home position H (at the time of returning), the blower 7 is stopped.
第5図はヒータ5及び送風手段7の好適な制御手順の
一例を示すフロー図である。FIG. 5 is a flow chart showing an example of a suitable control procedure for the heater 5 and the blower 7.
電源の投入時あるいは電源が投入されているときに、
先ずステツプS1で各記録ヘツド3a〜3dの温度が検出さ
れ、設定温度範囲の上限T1より高い温度の記録ヘツド
がある場合にはステツプS2へ移る。When the power is turned on or when the power is turned on,
First the temperature of the recording head 3a~3d in step S1 is detected, the process proceeds to step S2, if there is a recording head of a temperature higher than the upper limit T 1 of the set temperature range.
ステツプS2では各記録ヘツド3a〜3dが印字(記録)動
作中であるかどうか判断され、いずれか1つの記録ヘツ
ドが記録動作中であればステツプS4へ移り送風手段7を
駆動させステツプS5へ移る。又、ステツプS2で記録動作
中の記録ヘツドがないと判断された場合は、送風手段7
の駆動を停止する(送風手段7が既に停止状態の場合は
その状態を維持する)。In step S2, it is judged whether or not each recording head 3a to 3d is in the printing (recording) operation. If any one recording head is in the recording operation, the operation moves to step S4 and the air blowing means 7 is driven to move to step S5. . If it is determined in step S2 that there is no recording head during the recording operation, the blower 7
Is stopped (when the blower 7 is already stopped, that state is maintained).
ステツプS5で各記録ヘツド3a〜3dの温度が再び検出さ
れ、設定温度T2より高い温度の記録ヘツドがあればス
テツプS2へ移り、以上のフローを繰り返す。尚、この設
定温度T2は記録ヘツドを駆動する設定温度範囲内で、
かつ送風手段7の駆動を行うかどうかを決定する温度で
ある。Temperature of the recording head 3a~3d is detected again at step S5, if there is a recording head of higher than the set temperature T 2 temperature moves to step S2, and repeats the above flow. This set temperature T 2 is within the set temperature range for driving the recording head,
In addition, the temperature is a temperature that determines whether to drive the blower unit 7.
ステツプS5で設定温度T2より高い温度の記録ヘツド
がなければステツプS6へ移り、送風手段7の駆動を停止
する。(尚、ステツプS2は、記録ヘツドが往方向へ移動
中か否かを判断するものであっても良い。) ステツプS1で全ヘツドの温度がすでに設定温度範囲の
上限T1より低いと判定された場合、またはステツプS6
の処理後にはステツプS7に進み、各ヘツドの温度を再び
検出し、設定温度範囲の下限T3より低いヘツドがあれ
ばステツプS8〜S14でそれぞれのヘツドのヒータがオン
されて加熱される。ステツプS15では温度検出を行い、
加熱されているヘツド全部が設定温度範囲の中心T2以
上の温度であるかを判定し、肯定判定であればステツプ
S16でヒータをオフとし、否定判定であればそのままス
テツプS15をくり返す。If there is no recording head having a temperature higher than the set temperature T 2 at step S5, the operation proceeds to step S6, and the driving of the blowing means 7 is stopped. (Note that step S2 may determine whether or not the recording head is moving in the forward direction.) In step S1, it is determined that the temperatures of all the heads are already lower than the upper limit T 1 of the set temperature range. Or step S6
After processing, the process proceeds to step S7, the temperature of each head is detected again, is heated by the heater is turned on for each head at step S8~S14 if lower head than the lower limit T 3 of the set temperature range. In step S15, the temperature is detected,
It is judged whether all the heated heads are at the temperature of the center T 2 or more of the set temperature range.
The heater is turned off in S16, and if the determination is negative, step S15 is repeated.
ステツプS7ですでに4個のヘツド全部が設定温度範囲
の下限T3より高ければそのまま処理を終了する。一
方、ステツプS16の処理後にはステツプS1に進んで以降
の処理を繰り返し4個のヘツドすべてが所定の設定温度
範囲に保たれるように制御する。If all four heads are already higher than the lower limit T 3 of the set temperature range at step S7, the process is terminated. On the other hand, after the processing of step S16, the process proceeds to step S1 and the subsequent processing is repeated to control so that all the four heads are maintained within a predetermined set temperature range.
このような制御動作を施せば、低温環境下での記録、
または連続した記録の途中で徐々に、もしくは急激にヘ
ツド温度が上昇した場合にも対応が可能となる。このよ
うにヘツド温度が適切な設定温度範囲に常に保たれるよ
うにしてヘツド間の温度差を押さえた状態においては、
ヘツド間の温度差に起因した画像変動を抑制して安定し
た画像が得られることになる。By performing such control operation, recording under low temperature environment,
Alternatively, it is possible to deal with a case where the head temperature rises gradually or rapidly during continuous recording. In this way, the head temperature is always kept in an appropriate set temperature range and the temperature difference between the heads is suppressed,
A stable image can be obtained by suppressing the image variation caused by the temperature difference between the heads.
また、記録ヘツドがホーム位置H(又はヘツドリター
ン位置)戻る際に送風手段をオフすることで、記録画像
全体としての濃度ムラも認知されない程度に低下せしめ
ることができることになる。Further, by turning off the blowing means when the recording head returns to the home position H (or the head return position), it is possible to reduce the density unevenness of the entire recorded image to the extent that it is not perceived.
(実施例1) 実際に、16ペル、256個の吐出口を有するバブルジエ
ツト記録方式を用いたインクジエツト記録ヘツドを用い
た第1図で説明した記録装置を用いて記録を行った。(Example 1) Actually, recording was performed using the recording apparatus described in FIG. 1 using an ink jet recording head using a bubble jet recording system having 16 pels and 256 ejection ports.
より具体的には、記録ヘツドをデユーテイーを75%
(近似的に256個の吐出口の75%から平均して記録用イ
ンクが吐出されている状態と考えて良い。)で駆動して
均一な画像記録を行った。各記録ヘツドに供給した記録
用インクは水…60部、ジエチレングリコール…30部、n
−メチル−2−ピロリドン…7部、染料…3部の組成の
ものを用いた。もちろん、染料は各記録ヘツドに対応さ
せて各色の染料を用いた。More specifically, the recording head is 75% duty.
(It may be considered that the recording ink is ejected on average from 75% of the 256 ejection ports.), And uniform image recording is performed. The recording ink supplied to each recording head was water ... 60 parts, diethylene glycol ... 30 parts, n.
-Methyl-2-pyrrolidone ... 7 parts, dye ... 3 parts were used. Of course, the dye used was a dye of each color corresponding to each recording head.
その結果、往時に画像記録を行い、復時には画像記録
を行わない様に記録ヘツドを駆動したところ、常に送風
手段であるフアンを駆動させた場合(比較例1)におけ
る記録画像の濃度差と較べて、復時にフアンの駆動を停
止させた場合(実施例1)である本発明による記録画像
の濃度差は、濃度変化で0.04小さくすることができ、明
らかに画像濃度ムラを解消することができた。As a result, when the recording head was driven so that image recording was performed at the time of forward and not at the time of returning, it was compared with the density difference of the recorded image in the case where the fan that is the air blowing means was always driven (Comparative Example 1). Then, the density difference of the recorded image according to the present invention when the driving of the fan is stopped at the time of returning (Example 1) can be reduced by 0.04 by the density change, and the image density unevenness can be obviously eliminated. It was
尚、この時の記録ヘツドの温度差を測定したところ、
比較例1においては、往時の最初と最後では記録ヘツド
の温度が4℃以上異なり、濃度変化が表われる程度の温
度差があったが、実施例1の場合は約2℃程度しか温度
差がなく、実画像としてはほとんど画像の濃度変化とし
て認知できない温度差であったことも確認された。Incidentally, when the temperature difference of the recording head at this time was measured,
In Comparative Example 1, the temperature of the recording head was different by 4 ° C. or more at the beginning and the end of the forward time, and there was a temperature difference to the extent that a density change was observed, but in the case of Example 1, the temperature difference was only about 2 ° C. It was also confirmed that the actual image had a temperature difference that was almost unrecognizable as a change in image density.
(実施例2) 走査方向に対して往時の最初の2/5の領域と最後の2/5
の領域を記録ヘツドを実施例1と同様に駆動したとこ
ろ、走査方向の往時の中間部分の1/5の領域と復時にフ
アンを停止させた本発明の実施例2により画像品位は、
同条件で記録ヘツドを駆動し、常にフアンを駆動し続け
た比較例2のものと較べて画像濃度ムラもなく極めて高
品位であった。(Embodiment 2) First 2/5 area and last 2/5 in the forward direction with respect to the scanning direction
When the recording head is driven in the same manner as in the first embodiment, the image quality according to the second embodiment of the present invention in which the area of 1/5 of the intermediate portion in the forward direction in the scanning direction and the fan in the backward movement are stopped,
The image quality was extremely high and there was no image density unevenness, as compared with Comparative Example 2 in which the recording head was driven under the same conditions and the fan was continuously driven.
以上説明したように、本発明の構成によれば、検出さ
れる記録ヘッドの温度が所定温度以上であって印字動作
を伴う往方向の移動中であるときに送風手段が駆動さ
れ、印字動作を伴わずに記録ヘッドを復方向へ移動させ
るリターン動作時には送風手段の駆動が停止される 本発明によれば、記録ヘッドを過剰に冷却することが
なく、往方向への移動が終了したときの記録ヘッドの温
度と次の往方向への移動開始時の記録ヘッドの温度との
差を小さくできるため、記録ヘッドの温度差によって生
じる画像濃度の変動を極めて少なくすることができる。
本発明により、記録画像の濃度ムラを実質的に無くすこ
とができ、より一層高品位の記録画像を得ることができ
る。As described above, according to the configuration of the present invention, when the detected temperature of the recording head is equal to or higher than the predetermined temperature and the print head is moving in the forward direction, the blower unit is driven to perform the printing operation. According to the present invention, the drive of the blowing unit is stopped during the return operation in which the recording head is moved in the backward direction without being accompanied by the present invention. The recording is performed when the movement in the forward direction is completed without excessively cooling the recording head. Since the difference between the temperature of the head and the temperature of the recording head at the start of the movement in the next forward direction can be made small, the fluctuation in the image density caused by the temperature difference of the recording head can be extremely reduced.
According to the present invention, it is possible to substantially eliminate density unevenness of a recorded image, and it is possible to obtain a higher quality recorded image.
第1図は本発明を適用可能な記録装置の一例としてイン
クジエツト記録装置の一構成例を示す模式的斜視図、 第2図はその記録ユニツトの一構成例を示す模式的斜視
図、 第3図は第1図示の記録装置に適用可能な制御系の一構
成例を示すブロツク図、 第4図は第3図示の制御系による記録ヘツドの温度制御
のアルゴリズムを説明するための説明図、 第5図は本発明に適用可能な制御手順を示すフローチヤ
ート図である。 1……記録ユニツト 2……キヤリツジ 3,3a,3b,3c,3d……記録ヘツド 4……温度検出手段 5……ヒータ 7……送風手段 20……不吐出回復装置 2、15、16……移動手段 9……制御手段FIG. 1 is a schematic perspective view showing a configuration example of an ink jet recording device as an example of a recording device to which the present invention is applicable, and FIG. 2 is a schematic perspective view showing a configuration example of the recording unit, FIG. FIG. 4 is a block diagram showing an example of the configuration of a control system applicable to the recording apparatus shown in FIG. 1, and FIG. 4 is an explanatory diagram for explaining an algorithm for controlling the temperature of the recording head by the control system shown in FIG. The figure is a flow chart showing a control procedure applicable to the present invention. 1 ... Recording unit 2 ... Carriage 3,3a, 3b, 3c, 3d ... Recording head 4 ... Temperature detecting means 5 ... Heater 7 ... Blower 20 ... Non-ejection recovery device 2,15,16 ... … Transportation means 9 …… Control means
フロントページの続き (56)参考文献 特開 昭61−173066(JP,A) 特開 昭57−157781(JP,A) 特開 昭62−244654(JP,A) 特開 昭60−245578(JP,A) 特開 昭61−58783(JP,A) 特開 昭63−126778(JP,A) 実開 昭59−160264(JP,U) 実開 昭60−106744(JP,U) 実開 昭55−140450(JP,U)Continuation of the front page (56) Reference JP 61-173066 (JP, A) JP 57-157781 (JP, A) JP 62-244654 (JP, A) JP 60-245578 (JP , A) JP 61-58783 (JP, A) JP 63-126778 (JP, A) Actually open 59-160264 (JP, U) Actually opened 60-106744 (JP, U) Actually opened 55-140450 (JP, U)
Claims (1)
を吐出して記録媒体上に記録を行うための記録ヘッド
と、前記記録ヘッドを前記記録媒体に沿って往復移動さ
せる移動手段と、前記移動手段による前記記録ヘッドの
往方向の移動中に前記記録ヘッドによる記録動作を行
い、前記記録ヘッドの復方向の移動は記録動作を伴わな
いリターン動作を行う記録制御手段とを備える記録装置
において、 前記記録ヘッドの温度を検出する温度検出手段と、 前記記録ヘッドの冷却を行う送風手段と、 前記温度検出手段により検出される前記記録ヘッドの温
度が所定の温度以上のときであって前記記録ヘッドの往
方向の移動中のときに前記送風手段を駆動するととも
に、前記リターン動作中は前記送風手段の駆動を停止さ
せる制御手段と、 を備えることを特徴とする記録装置。1. A recording head for recording ink on a recording medium by ejecting ink from an ejection port by using thermal energy, a moving means for reciprocating the recording head along the recording medium, and A recording apparatus comprising: a recording control unit that performs a recording operation by the recording head while the recording unit is moving in the forward direction by the moving unit, and performs a return operation that does not involve a recording operation when the recording head moves in the backward direction; A temperature detecting means for detecting the temperature of the recording head; an air blowing means for cooling the recording head; and a temperature of the recording head detected by the temperature detecting means is equal to or higher than a predetermined temperature And a control means for driving the blower during the return movement and stopping the drive of the blower during the return operation. And a recording device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63086815A JP2692846B2 (en) | 1988-04-07 | 1988-04-07 | Recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63086815A JP2692846B2 (en) | 1988-04-07 | 1988-04-07 | Recording device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01257078A JPH01257078A (en) | 1989-10-13 |
JP2692846B2 true JP2692846B2 (en) | 1997-12-17 |
Family
ID=13897303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63086815A Expired - Lifetime JP2692846B2 (en) | 1988-04-07 | 1988-04-07 | Recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2692846B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03234630A (en) * | 1990-02-13 | 1991-10-18 | Canon Inc | Ink-jet recording device |
EP0551521B1 (en) * | 1991-08-02 | 1998-11-18 | Canon Kabushiki Kaisha | Base for ink jet head, ink jet head using said base, and ink jet device equipped with said head |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57157781A (en) * | 1981-03-26 | 1982-09-29 | Toshiba Corp | Serial printing device |
JPS59160264U (en) * | 1983-04-13 | 1984-10-26 | オムロン株式会社 | Print processing device |
JPS60106744U (en) * | 1983-12-27 | 1985-07-20 | 日本電気株式会社 | printer |
JPS60245578A (en) * | 1984-05-21 | 1985-12-05 | Fujitsu Ltd | Cooling fan controller for printer |
JPS61173066A (en) * | 1985-01-29 | 1986-08-04 | 株式会社東芝 | Controller of fan for cooling heat-generating apparatus |
JPS62244654A (en) * | 1986-04-16 | 1987-10-26 | Nec Corp | Serial printer |
-
1988
- 1988-04-07 JP JP63086815A patent/JP2692846B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01257078A (en) | 1989-10-13 |
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