JP2503563B2 - How to control the thermal storage of thermal head - Google Patents
How to control the thermal storage of thermal headInfo
- Publication number
- JP2503563B2 JP2503563B2 JP385788A JP385788A JP2503563B2 JP 2503563 B2 JP2503563 B2 JP 2503563B2 JP 385788 A JP385788 A JP 385788A JP 385788 A JP385788 A JP 385788A JP 2503563 B2 JP2503563 B2 JP 2503563B2
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- thermal
- printing
- temperature
- color
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
- B41J2/355—Control circuits for heating-element selection
- B41J2/36—Print density control
- B41J2/365—Print density control by compensation for variation in temperature
-
- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
- B41J2/355—Control circuits for heating-element selection
- B41J2/36—Print density control
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はサーマルプリンタにおけるサーマルヘッドの
蓄熱を制御する方法に関する。The present invention relates to a method for controlling heat storage of a thermal head in a thermal printer.
（従来の技術及び問題点） 従来の熱転写及び感熱型サーマルプリンタの中には例
えば第２図のブロック図に示されるような方法によって
Ｙ色（イエロー）、Ｍ色（マゼンタ）及びＣ色（シア
ン）の色でカラー印字される型式のものがあり、その方
法は次のように構成されている。(Prior Art and Problems) Among conventional thermal transfer and thermal type thermal printers, for example, Y color (yellow), M color (magenta) and C color (cyan) are produced by a method shown in the block diagram of FIG. ) There is a type that is color printed with the color, and the method is configured as follows.
即ち先ず最初の１ライン分のデータを受信した後サー
マルヘッドに受信データを転送する。次ぎにサーマルヘ
ッドの各コモンに対して電流を流して印字を行なう。１
ライン分の印字が終了した後に用紙を１ライン分送り、
用紙送り動作が完了するまで用紙送り待ち時間Ｗだけ待
機する。この動作を繰返してＹ色（イエロー）の印字を
行なった後、用紙をＹ色の１ライン目まで戻すと同時に
転写リボンもＭ色（マゼンタ）の先頭にセットする。こ
のようにＭ色（マゼンタ）、Ｃ色（シアン）と順次印字
動作を行ない、最後のフォーム・フィードで用紙と転写
リボンが次頁の動作位置にセットされる。That is, first, after receiving the first line of data, the received data is transferred to the thermal head. Next, current is applied to each common of the thermal head for printing. 1
After printing one line, feed the paper one line,
Wait for the paper feed waiting time W until the paper feed operation is completed. After repeating this operation to perform printing of Y color (yellow), the paper is returned to the first line of Y color, and at the same time, the transfer ribbon is set to the head of M color (magenta). In this manner, the printing operation is sequentially performed for the M color (magenta) and the C color (cyan), and the paper and the transfer ribbon are set to the operation position of the next page by the last form feed.
しかしながら熱転写及び感熱式のサーマルプリンタに
て印字密度が高いパターンを連続して印字すると、サー
マルヘッドの発熱体に加わるエネルギが大きくなり、こ
の状態を長く続けるとサーマルヘッド及び放熱器から放
熱する量よりサーマルヘッドに蓄熱する量が大となり、
インクシートまで溶融して転写フィルムにしわが寄った
り印字のにじみが出て印字の続行が不可能な状態とな
る。However, if a pattern with high print density is printed continuously with a thermal transfer or thermal thermal printer, the energy applied to the heating element of the thermal head will increase, and if this state is continued for a long time, the amount of heat radiated from the thermal head and radiator will be higher. The amount of heat stored in the thermal head becomes large,
Even the ink sheet is melted and wrinkles are generated on the transfer film, or printing bleeding occurs, making it impossible to continue printing.
即ち転写フィルムのしわ及び印字のにじみは必要以上
の熱がサーマルヘッドに加わることにより発生するので
ある。That is, the wrinkles of the transfer film and the bleeding of the print are generated by applying excessive heat to the thermal head.
（問題点を解決するための手段） 本発明は上述のもを解決するための対策としてサーマ
ルヘッドの放熱と蓄熱の関係を変えて蓄熱量を抑えるこ
とに着目したものであり、それを可能にするために、本
発明によるサーマルヘッドの蓄熱を制御する方法は、サ
ーマルヘッドの温度変化を検知する検知手段を備え、当
該検知値の変化に応じて前記用紙送り待ち時間を増減す
るようにしたものである。(Means for Solving the Problems) The present invention focuses on suppressing the heat storage amount by changing the relationship between heat dissipation and heat storage of the thermal head as a measure for solving the above problems, and enables it. In order to do so, the method for controlling heat storage of the thermal head according to the present invention comprises a detection means for detecting a temperature change of the thermal head, and the paper feed waiting time is increased or decreased according to the change of the detected value. is there.
次ぎにサーマルヘッドの蓄熱を制御する方法の具体的
構成について説明する。Next, a specific configuration of the method for controlling the heat storage of the thermal head will be described.
先ずYMCの各色印字を開始する前にサーマルヘッドの
温度を検出して、前回のYMCの各色印字を開始する前の
サーマルヘッドの温度との温度差を求める。その温度の
検出は例えばサーミスタによる。First, the temperature of the thermal head is detected before printing each color of YMC, and the temperature difference from the temperature of the thermal head before the previous printing of each color of YMC is started is obtained. The temperature is detected by, for example, a thermistor.
次いでこの温度差を基にしてサーマルヘッドの温度変
化に応じた印字速度に設定する。Then, based on this temperature difference, the printing speed is set according to the temperature change of the thermal head.
この温度差と印字速度の関係は実験値から得られ、温
度差による印字速度の設定は例えば次ぎのようにして行
なわれる。The relationship between the temperature difference and the printing speed is obtained from an experimental value, and the printing speed is set according to the temperature difference, for example, as follows.
前回印字開始時の温度＜今回印字開始時の温度の場合→
印字速度を遅くする 前回印字開始時の温度＞今回印字開始時の温度の場合→
印字速度を速くする 尚温度差の数値に応じてさらに印字速度を数段階に分
ける。Temperature at the start of the previous print <If the temperature at the start of this print →
Decrease the print speed If the temperature at the start of the previous print> the temperature at the start of the current print →
Increasing the printing speed The printing speed is further divided into several stages according to the numerical value of the temperature difference.
又サーマルヘッドの温度変化でも数段階に分けて制御
する。In addition, the temperature change of the thermal head is controlled in several steps.
（実施例） 以下本発明によるサーマルヘッドの蓄熱を制御する方
法の実施例について第１図のブロック図を参照して説明
する。(Embodiment) An embodiment of a method for controlling heat storage of a thermal head according to the present invention will be described below with reference to the block diagram of FIG.
第１図において第２図と共通する部分は第２図につい
ての説明と同じであるので省略する。The parts in FIG. 1 common to those in FIG. 2 are the same as in the description of FIG.
印字開始する前にサーマルヘッドの温度を検出して、
前回の印字開始する前のサーマルヘッドの温度との温度
差を求める。この温度差を基にサーマルヘッドの温度変
化を検知して、サーマルヘッドの温度が上昇していると
きは、用紙送りの補正用待ち時間△Ｗを大きな値にして
印字速度を遅くしてサーマルヘッドへの蓄熱量を抑える
方向に、逆に温度が下降しているときは、△Ｗを小さく
して印字速度を速くするように制御する。Detect the temperature of the thermal head before starting printing,
Find the temperature difference from the temperature of the thermal head before the start of the previous printing. The temperature change of the thermal head is detected based on this temperature difference, and if the temperature of the thermal head is rising, the waiting time for paper feed correction ΔW is set to a large value to slow down the printing speed to the thermal head. On the contrary, when the temperature is decreasing in the direction of suppressing the heat storage amount, the ΔW is reduced to control the printing speed to be increased.
尚、温度差が同じでもサーマルヘッドの温度によって
も△Ｗは変化する。例えば温度が高いときは△Ｗも大き
な値とし、温度が低いときは△Ｗも小さな値となり、１
ラインの用紙送り待ち時間Ｗと加算されて待機時間とす
る。以上のように制御を行なうことによりサーマルヘッ
ドの蓄熱を制御できる。Even if the temperature difference is the same, ΔW changes depending on the temperature of the thermal head. For example, when the temperature is high, ΔW has a large value, and when the temperature is low, ΔW also has a small value.
The waiting time is added to the paper feed waiting time W of the line. The heat storage of the thermal head can be controlled by performing the control as described above.
サーマルヘッドの温度差と印字速度の関係の一例につ
いて述べる。An example of the relationship between the temperature difference of the thermal head and the printing speed will be described.
温度差＝前回印字開始時の温度−今回印字開始時の温度 温度差がマイナス方向のときは、サーマルヘッドの温
度が上昇（印字密度が高い）しているため低速印字を行
なってサーマルヘッドの蓄熱量を抑え、又温度差がプラ
ス方向のときは、サーマルヘッドの温度が下降（印字密
度が低い）しているため印字速度を上げることが可能と
なる。Temperature difference = temperature at the start of the previous print-temperature at the start of the current print When the temperature difference is in the minus direction, the temperature of the thermal head is rising (the printing density is high), so low-speed printing is performed to suppress the amount of heat stored in the thermal head, and when the temperature difference is in the plus direction, the thermal head It is possible to increase the printing speed because the temperature of is decreased (print density is low).
尚本実施例においてはＹ色、Ｍ色及びＣ色の色でカラ
ー印字するものを例示したが、一色のものにすることも
できる。In this embodiment, the color printing is performed with the colors Y, M and C, but one color may be used.
（発明の効果） 本発明によるサーマルヘッドの蓄熱を制御する方法
は、上述のように構成されているので、印字密度が高い
パターンを連続して印字する場合でもサーマルヘッドの
蓄熱量を低く抑えることができ、そのため転写フィルム
にしわが寄ったり印字のにじみが出たりするのを防ぐこ
とができる。(Effect of the Invention) Since the method for controlling heat storage of the thermal head according to the present invention is configured as described above, it is possible to keep the heat storage amount of the thermal head low even when continuously printing a pattern having a high print density. As a result, it is possible to prevent the transfer film from being wrinkled and from causing printing bleeding.
第１図は本発明によるサーマルヘッドの蓄熱を制御する
方法の実施例を説明するためのブロック図、 第２図はサーマルヘッドの蓄熱を制御しない従来の方法
を説明するためのブロック図である。FIG. 1 is a block diagram for explaining an embodiment of a method of controlling heat storage of a thermal head according to the present invention, and FIG. 2 is a block diagram for explaining a conventional method of not controlling heat storage of a thermal head.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭51−29930（ＪＰ，Ａ) 特開 昭60−165270（ＪＰ，Ａ) 特開 昭60−217176（ＪＰ，Ａ) 特開 昭61−89055（ＪＰ，Ａ) 特開 昭61−177258（ＪＰ，Ａ) 特開 昭63−149169（ＪＰ，Ａ) 実開 昭64−20340（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-51-29930 (JP, A) JP-A-60-165270 (JP, A) JP-A-60-217176 (JP, A) JP-A-61- 89055 (JP, A) JP 61-177258 (JP, A) JP 63-149169 (JP, A) Actual development Sho 64-20340 (JP, U)
Claims (2)
動作が完了するまでの用紙送り待ち時間だけ待機して、
次の１ライン分のデータを印刷するサーマルプリンタに
おいて、 サーマルヘッドの温度変化を検知する検知手段を備え、
当該検出値の変化に応じて前記用紙送り待ち時間を増減
するようにしたことを特徴とするサーマルヘッドの蓄熱
を制御する方法。1. After printing one line of data, a paper feed waiting time until the paper feed operation is completed is waited,
In a thermal printer that prints the data for the next one line, it is equipped with a detection means for detecting the temperature change of the thermal head,
A method for controlling heat storage of a thermal head, wherein the paper feed waiting time is increased or decreased in accordance with a change in the detected value.
るに際して、各色の印刷の間に用紙送り動作が完了する
までの用紙送り待ち時間を設けたカラーサーマルプリン
タにおいて、 サーマルヘッドの温度変化を検知する検知手段を備え、
当該検出値の変化に応じて前記用紙送り待ち時間を増減
するようにしたことを特徴とするサーマルヘッドの蓄熱
を制御する方法。2. A color thermal printer having a paper feed waiting time until the paper feed operation is completed between printing of each color when data for one line is overprinted for each color and detects a temperature change of a thermal head. Equipped with detection means to
A method for controlling heat storage of a thermal head, wherein the paper feed waiting time is increased or decreased in accordance with a change in the detected value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP385788A JP2503563B2 (en) | 1988-01-13 | 1988-01-13 | How to control the thermal storage of thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP385788A JP2503563B2 (en) | 1988-01-13 | 1988-01-13 | How to control the thermal storage of thermal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01180365A JPH01180365A (en) | 1989-07-18 |
| JP2503563B2 true JP2503563B2 (en) | 1996-06-05 |
Family
ID=11568857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP385788A Expired - Lifetime JP2503563B2 (en) | 1988-01-13 | 1988-01-13 | How to control the thermal storage of thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2503563B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5510383B2 (en) * | 1974-09-06 | 1980-03-15 | ||
| JPS60165270A (en) * | 1984-02-06 | 1985-08-28 | Fujitsu Ltd | Thermal printer |
| JPS60217176A (en) * | 1984-04-13 | 1985-10-30 | Matsushita Electric Ind Co Ltd | Thermal printer |
| JPS6189055A (en) * | 1984-10-08 | 1986-05-07 | Fuji Xerox Co Ltd | Speed control device for thermosensitive recording |
| JPS61177258A (en) * | 1985-02-04 | 1986-08-08 | Hitachi Ltd | Thermal transfer printer |
-
1988
- 1988-01-13 JP JP385788A patent/JP2503563B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01180365A (en) | 1989-07-18 |
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