JPH0331352B2 - - Google Patents
Info
- Publication number
- JPH0331352B2 JPH0331352B2 JP60033468A JP3346885A JPH0331352B2 JP H0331352 B2 JPH0331352 B2 JP H0331352B2 JP 60033468 A JP60033468 A JP 60033468A JP 3346885 A JP3346885 A JP 3346885A JP H0331352 B2 JPH0331352 B2 JP H0331352B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- head
- heat
- dots
- steps
- 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
Landscapes
- Electronic Switches (AREA)
- Fax Reproducing Arrangements (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、サーマルプリンタあるいは熱転写プ
リンタに用いる発熱ヘツドの加熱制御方法に関す
るものである。更に詳しくは、複数個の発熱体が
一列に配列された発熱ヘツドを用い、この発熱体
の配列方向と交わる方向に発熱ヘツドをステツプ
状に移動させ、各ステツプで発熱体を選択的に加
熱して印字を行なう発熱ヘツドの加熱制御方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heating control method for a heat generating head used in a thermal printer or a thermal transfer printer. More specifically, a heating head in which a plurality of heating elements are arranged in a row is used, and the heating head is moved stepwise in a direction intersecting the direction in which the heating elements are arranged, and the heating elements are selectively heated at each step. The present invention relates to a heating control method for a heat generating head that performs printing.
サーマルプリンタあるいは熱転写プリンタで
は、発熱ヘツドの蓄熱効果のため、発熱ヘツドに
一定の印字パワーを与えておいても、一行の中で
も行頭に印字するときと行末に印字するときでは
発熱ヘツドの温度が異なる。このため、印字濃度
が不均一になるという問題点があつた。
In thermal printers or thermal transfer printers, due to the heat storage effect of the heating head, even if a constant printing power is applied to the heating head, the temperature of the heating head differs when printing at the beginning of a line and when printing at the end of a line. . For this reason, there was a problem that the print density became non-uniform.
従来、このような問題点を解決するための方法
として、例えば、24個の発熱体が配列された発熱
ヘツドを用い、発熱体の配列方向と直交する方向
に発熱ヘツドをステツプ状に移動させ、24×24ド
ツトのパターンを印字したところで（24ステツプ
移動したところで）、このドツトパターンの中で
発熱したドツトの個数をカウントし、カウント値
に応じて発熱ヘツドへの印字パワーを減少させる
ようにしたものがあつた。 Conventionally, as a method to solve such problems, for example, a heating head in which 24 heating elements are arranged is used, and the heating head is moved in steps in a direction perpendicular to the arrangement direction of the heating elements. After printing a 24 x 24 dot pattern (after moving 24 steps), the number of dots that generate heat in this dot pattern is counted, and the printing power to the heat generating head is reduced according to the count value. Something was warm.
しかし、上記方法では、24×24ドツト全てにつ
いて発熱したドツトの個数をカウントしなければ
ならないため、印字パワーを補償するのに長時間
を要し、ひいては印字スピードがおそくなるとい
う問題点があつた。
However, with the above method, the number of dots that generate heat must be counted for all 24 x 24 dots, so it takes a long time to compensate for the printing power, which has the problem of slowing down the printing speed. .
本発明は上述した問題点を除去するためになさ
れたものであり、印加パワーを短時間で補償でき
て、高速で均一濃度の記録が得られる発熱ヘツド
の加熱制御方法を実現することを目的とする。 The present invention has been made in order to eliminate the above-mentioned problems, and an object of the present invention is to realize a heating control method for a heat generating head that can compensate the applied power in a short time and obtain uniform density recording at high speed. do.
本発明は、複数個の発熱体が一列に配列された
発熱ヘツドを用い、前記発熱体の配列方向と交わ
る方向に発熱ヘツドをステツプ状に移動させ、各
ステツプで発熱体を選択的に加熱して印字を行な
う発熱ヘツドの加熱制御方法において、前記発熱
ヘツドのステツプに応じて前記発熱体の中の１つ
をカウントドツトにし、発熱体が所定のステツプ
数だけ移動したところで、全カウントドツトの中
で発熱したものが占める割合を、前記所定のステ
ツプ数の移動により形成されるドツトパターンの
全ドツトの中で発熱したものが占める割合として
発熱ヘツドの蓄熱量を求め、この蓄熱量に応じて
発熱ヘツドへの印加パワーを制御することを特徴
とする発熱ヘツドの加熱制御方法である。
The present invention uses a heating head in which a plurality of heating elements are arranged in a line, moves the heating head in steps in a direction intersecting the direction in which the heating elements are arranged, and selectively heats the heating elements at each step. In a heating control method for a heating head that performs printing, one of the heating elements is set as a count dot according to the step of the heating head, and when the heating element has moved a predetermined number of steps, all the count dots are set. The amount of heat stored in the heat generating head is calculated as the percentage of all the dots in the dot pattern formed by moving the predetermined number of steps. This is a heating control method for a heat generating head characterized by controlling the power applied to the head.
以下、図面により本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明にかかる方法を実現するための
装置の一例を示した構成ブロツク図である。 FIG. 1 is a block diagram showing an example of an apparatus for implementing the method according to the present invention.
第１図において、１０は発熱ヘツド、２０はヘ
ツド駆動手段、３０はカウンタ、４０は加熱制御
手段である。 In FIG. 1, 10 is a heat generating head, 20 is a head driving means, 30 is a counter, and 40 is a heating control means.
発熱ヘツド１０には、例えば24個の発熱体が一
列に配列されている。発熱ヘツド１０は、発熱体
の配列方向と直交する方向にステツプ状に移動す
る。発熱ヘツド１０が２４ステツプ移動すると、
24×24ドツトのパターンが形成される。各ステツ
プで発熱体は選択的に加熱される。このようなド
ツトパターンを第２図に示す。このドツトパター
ンで、１列分の発熱体をカラムとすると、各カラ
ムにはカウントドツト１２1〜１２24が１個ずつ
設けられている。これらのカウントドツト１２1
〜１２24の配列は、例えば第２図に示すようにあ
る程度の規則性をもつている。カウントドツト１
２1〜１２24の発熱状態は、それが属するカラム
の発熱状態を代表するものである。 In the heating head 10, for example, 24 heating elements are arranged in a row. The heating head 10 moves stepwise in a direction perpendicular to the direction in which the heating elements are arranged. When the heat generating head 10 moves 24 steps,
A 24×24 dot pattern is formed. At each step, the heating element is selectively heated. Such a dot pattern is shown in FIG. In this dot pattern, assuming that one row of heating elements is a column, each column is provided with one count dot 12 1 to 12 24 . These count dots 12 1
The arrangement of ~12 24 has a certain degree of regularity, as shown in FIG. 2, for example. count dot 1
The exothermic states of 2 1 to 12 24 are representative of the exothermic states of the columns to which they belong.
ヘツド駆動手段２０は発熱ヘツド１０に印加パ
ワーを与えて駆動する。 The head driving means 20 applies applied power to the heat generating head 10 to drive it.
カウンタ３０は、印字動作の際に、発熱してい
るカウントドツトの個数をカウントする。このカ
ウントは、例えば発熱ヘツド１０が２４ステツプ
移動したところで行なわれる。 The counter 30 counts the number of count dots that are generating heat during printing operations. This counting is performed, for example, when the heating head 10 has moved 24 steps.
加熱制御手段４０は、カウンタ３０からの信号
をもとにして、カウントドツト１２1〜１２24の
中で発熱しているものが占める割合を求め、この
割合を、24×24ドツトのパターンの中で、発熱し
たドツトが占める割合としてヘツドの蓄熱量を算
出する。そして、算出した蓄熱量をもとにして、
ヘツド駆動手段２０が出力する印加パワーを制御
する制御信号を発生する。 The heating control means 40 determines the proportion of the count dots 12 1 to 12 24 that are generating heat based on the signal from the counter 30, and divides this proportion into a pattern of 24×24 dots. Then, the amount of heat stored in the head is calculated as the proportion of dots that generate heat. Then, based on the calculated amount of heat storage,
A control signal is generated to control the applied power output by the head drive means 20.
次に、このような装置の動作について説明す
る。 Next, the operation of such a device will be explained.
第３図に示すように〇の部分のドツトが加熱さ
れた場合について説明する。 The case where the dots marked with circles as shown in FIG. 3 are heated will be explained.
この場合は、カウントドツト１２1〜１２24の
中では１２13と１２14が発熱されるため、発熱し
ているカウントドツトの割合は、
２／24＝１／12
となる。 In this case, among the count dots 12 1 to 12 24 , 12 13 and 12 14 generate heat, so the ratio of the count dots generating heat is 2/24=1/12.
各カウントドツトの発熱状態は、それが属する
カラムの発熱状態を代表するものであることか
ら、この割合を、24×24ドツトのパターンの中で
発熱しているドツトが占める割合として蓄熱量を
求める。そして、この蓄熱量をもとにして印字パ
ワーを補償する。 Since the heat generation state of each count dot is representative of the heat generation state of the column to which it belongs, the amount of heat storage is calculated as the percentage of the dots generating heat in the 24 x 24 dot pattern. . Then, the printing power is compensated based on this amount of heat storage.
補償された印加パワーの経時的変化を第４図に
示す。第４図のグラフでは、縦軸には印加パワ
ー、横軸には時間をとつている。 The time course of the compensated applied power is shown in FIG. In the graph of FIG. 4, the vertical axis represents applied power and the horizontal axis represents time.
このグラフにも示すように、蓄熱でヘツドの温
度が上昇するのを防止するため、印加パワーを経
時的に減少させる。発熱したカウントドツトの割
合が多いほど印加パワーの減少率を大きく（グラ
ムa1からa2に）する。 As shown in this graph, in order to prevent the head temperature from increasing due to heat accumulation, the applied power is reduced over time. The greater the proportion of counted dots that generate heat, the greater the reduction rate of the applied power (from gram a 1 to gram a 2 ).
一方、24×24ドツトのパターンの中で実際に発
熱されたドツトが占める割合は、
24×２／24×24＝１／12
となり、カウントドツトのみから求めた割合と一
致する。 On the other hand, the proportion of dots that actually generate heat in the 24 x 24 dot pattern is 24 x 2/24 x 24 = 1/12, which agrees with the proportion calculated from only counted dots.
なお、カウントドツトの配列は第２図に示す配
列以外のもの例えば乱数により位置指定をしたも
の等であつてもよい。 Incidentally, the arrangement of the count dots may be other than the arrangement shown in FIG. 2, for example, the positions may be designated by random numbers.
また、発熱ヘツド１０には発熱体１１が24個以
外の数だけ設けられていてもよい。 Further, the heat generating head 10 may be provided with a number of heat generating elements 11 other than 24.
また、発熱ヘツド１０は、発熱体１１の配列方
向と交わる方向に移動してもよい。 Further, the heat generating head 10 may move in a direction intersecting the arrangement direction of the heat generating elements 11.
また、発熱したカウントドツトのカウントは、
24×24ドツト以外のパターンが形成される毎に行
なつてもよい。 In addition, the count of heated count dots is
The process may be performed every time a pattern other than 24×24 dots is formed.
〔効果〕
本発明に係る方法によれば、次のような効果が
得られる。[Effects] According to the method according to the present invention, the following effects can be obtained.
確率的な手法を用いて、各カラムを代表したカ
ウントドツトの中で発熱したものの割合から蓄熱
量を求め、この蓄熱量に応じて印加パワーを補償
している。このため、実際に発熱した発熱体をす
べてカウントする必要がなくなる。これによつ
て、印加パワーを短時間で補償できて、高速で均
一濃度の記録を得ることができる。 Using a probabilistic method, the amount of heat storage is determined from the proportion of heat generated among the counted dots representing each column, and the applied power is compensated according to this amount of heat storage. Therefore, there is no need to count all the heating elements that actually generate heat. Thereby, the applied power can be compensated in a short time, and recording with uniform density can be obtained at high speed.
第１図は本発明にかかる方法を実現するための
装置の一例を示した構成ブロツク図、第２図は発
熱ヘツドの移動により形成されたドツトパターン
の一例を示した図、第３図及び第４図は第１図の
装置の動作説明図である。
１０…発熱ヘツド、１１…発熱体、１２1〜１
２24…カウントドツト、２０…ヘツド駆動手段、
３０…カウント、４０…加熱制御手段。
FIG. 1 is a block diagram showing an example of a device for realizing the method according to the present invention, FIG. 2 is a diagram showing an example of a dot pattern formed by moving a heat generating head, and FIGS. FIG. 4 is an explanatory diagram of the operation of the apparatus shown in FIG. 1. 10...Heating head, 11...Heating element, 12 1 to 1
2 24 ...count dot, 20...head driving means,
30...Count, 40...Heating control means.
Claims (1)
ドを用い、前記発熱体の配列方向と交わる方向に
発熱ヘツドをステツプ状に移動させ、各ステツプ
で発熱体を選択的に加熱して印字を行なう発熱ヘ
ツドの加熱制御方法において、 前記発熱ヘツドのステツプに応じて前記発熱体
の中の１つをカウントドツトにし、発熱体が所定
のステツプ数だけ移動したところで、全カウント
ドツトの中で発熱したものが占める割合を、前記
所定のステツプ数の移動により形成されるドツト
パターンの全ドツトの中で発熱したものが占める
割合として発熱ヘツドの蓄熱量を求め、この蓄熱
量に応じて発熱ヘツドへの印加パワーを制御する
ことを特徴とする発熱ヘツドの加熱制御方法。[Scope of Claims] 1. Using a heating head in which a plurality of heating elements are arranged in a line, the heating head is moved in steps in a direction intersecting the arrangement direction of the heating elements, and the heating elements are selectively moved at each step. In a heating control method for a heating head that performs printing by heating the head to a certain number of steps, one of the heating elements is set as a count dot according to the steps of the heating head, and when the heating element moves a predetermined number of steps, the entire count is counted. The amount of heat stored in the heat generating head is determined by taking the proportion of the dots that generate heat as the proportion of the dots that generate heat among all the dots in the dot pattern formed by moving the predetermined number of steps, and calculate the amount of heat stored in the heat generating head. 1. A heating control method for a heat generating head, characterized in that the power applied to the heat generating head is controlled accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60033468A JPS61192570A (en) | 1985-02-21 | 1985-02-21 | Method for controlling heating of thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60033468A JPS61192570A (en) | 1985-02-21 | 1985-02-21 | Method for controlling heating of thermal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61192570A JPS61192570A (en) | 1986-08-27 |
| JPH0331352B2 true JPH0331352B2 (en) | 1991-05-02 |
Family
ID=12387377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60033468A Granted JPS61192570A (en) | 1985-02-21 | 1985-02-21 | Method for controlling heating of thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61192570A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709197A2 (en) | 1994-10-31 | 1996-05-01 | Canon Kabushiki Kaisha | Recording apparatus provided with data count function and method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3904246B2 (en) * | 1994-04-08 | 2007-04-11 | 株式会社リコー | Toner supply device and developing device |
-
1985
- 1985-02-21 JP JP60033468A patent/JPS61192570A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709197A2 (en) | 1994-10-31 | 1996-05-01 | Canon Kabushiki Kaisha | Recording apparatus provided with data count function and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61192570A (en) | 1986-08-27 |
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