JPS6315767A - Head energization time controlling method for printer - Google Patents
Head energization time controlling method for printerInfo
- Publication number
- JPS6315767A JPS6315767A JP15878186A JP15878186A JPS6315767A JP S6315767 A JPS6315767 A JP S6315767A JP 15878186 A JP15878186 A JP 15878186A JP 15878186 A JP15878186 A JP 15878186A JP S6315767 A JPS6315767 A JP S6315767A
- Authority
- JP
- Japan
- Prior art keywords
- energization time
- head
- printing
- printing device
- line
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004044 response Effects 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
- B41J2/315—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
- B41J2/375—Protection arrangements against overheating
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、印字装置特にライン式サーマルプリンタの
サーマルヘッドの通電時間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 method for controlling the energization time of a thermal head of a printing device, particularly a line-type thermal printer.
第Ｓ図はヘッド例えばサーマルヘッドの或る時点での温
度と印字周期の交点（図の斜線部）によって示される、
サーマルヘッドに流す電流のパルス幅値（以後通電時間
と称する）の集まりとしてＲＯＭ上に格納されているテ
ーブル（ｃｌの図（これは従来例とこの発明で併用され
る）、第６図は通電時間と印字行数の関係を従来例とこ
の発明について比較した比較図、第７図は温度と印字行
数の関係を従来例とこの発明について比較した比較図、
そして第ｇ図は従来の通電時間制御方法を説明するのに
用いられる印字装置のブロック図である。FIG.
A table (cl diagram (this is used in both the conventional example and this invention) that is stored in the ROM as a collection of pulse width values (hereinafter referred to as energization time) of the current flowing to the thermal head, and Figure 6 shows the energization time. A comparative diagram comparing the relationship between time and the number of printed lines between the conventional example and the present invention, FIG. 7 is a comparative diagram comparing the relationship between the temperature and the number of printed lines between the conventional example and the present invention,
FIG. g is a block diagram of a printing device used to explain the conventional energization time control method.
この第ｇ図において、（ハは外部からの印字データが入
力されるインタフェースであり、（２）は読出し専用メ
モリｃ以下ＲＯＭと称する）であって処理プログラム及
び定数例えば上述のテーブル（Ｃ’ｌが格納されている
。（３）は書込み読出し可能なメモリｃ以下、ＲＡＭと
称する）であって、ＲＯＭ（ｕｌ内の処理プログラムの
使用する変数が格納されまた作業領域と称する）、（、
ｔｌはこのＣＰ Ｕ（ｔｌｌに接続されたアナログデジ
タル変換器ｃ以下Ａ−Ｄ変換器と称する）、（６）はイ
ンタフェース（ハ及びＡ−Ｄ変換器（ｒｌに接続され、
印字紙の横方向の全印字ドツト数に等しい発熱体を有す
る、サーマルプリンタ等のサーマルヘッドである。（り
）けこのサーマルヘッド（６）への通電時間を制御する
ための信号をＣＰ Ｕ（ｇｌがら出力するためのボート
である。In this Fig. g, (c is an interface through which print data is input from the outside, (2) is a read-only memory c, hereafter referred to as ROM), and a processing program and constants such as the above-mentioned table (C'l (3) is a writable and readable memory c (hereinafter referred to as RAM), ROM (in which variables used by the processing program in ul are stored and also referred to as a work area), (,
tl is this CPU (an analog-to-digital converter c connected to tll, hereinafter referred to as an A-D converter), (6) is an interface (c) and an A-D converter (connected to rl,
This is a thermal head for a thermal printer, etc., which has heating elements equal in number to the total number of printed dots in the horizontal direction of printing paper. This is a board for outputting from the CPU (GL) a signal for controlling the energization time to the thermal head (6).
次に、この印字装置のためのサーマルヘッドの通電時間
制御方法について説明する。まずＲＯＭ［ユ）に格納さ
れているプログラムが起動され、サーマルヘッド（６）
に取付けられているサーミスタ（図示されない）の抵抗
値をＡ−Ｄ変換器〔５１でデジタル値に変換し、これを
ＣＰ Ｕ（Ａｌに入力して演算処理することによりサー
マルヘッド（６）の温度を求める。Next, a method for controlling the energization time of the thermal head for this printing device will be explained. First, the program stored in the ROM [Y] is started, and the thermal head (6)
The temperature of the thermal head (6) is determined by converting the resistance value of a thermistor (not shown) attached to the thermal head (6) into a digital value using an A-D converter (51), and inputting this value to the CPU (Al) for calculation processing. seek.
これは／ベージ即ち／枚目の第１行目のみ行うものであ
り、以後第２行目以降もこの温度を用いる。This temperature is applied only to the first line of /page, that is, the /th sheet, and this temperature is used for the second and subsequent lines.
そして予めＲＯＭ（コ）に格納されている窓第Ｓ図のテ
ーブル（Ｃ１を用いてこの温度と印字周期（或る行の印
字を開始してから次の行の印字を開始するまでの時間）
により通電時間を求め、その結果ボート（り）を介して
ＣＰ Ｕ（ａｌから送られて来た信号に対応してサーマ
ルヘッド（６）が通電される。Then, using the table (C1) in window S, which is stored in advance in the ROM, the temperature and printing cycle (time from starting printing of a certain line to starting printing of the next line) are determined.
As a result, the thermal head (6) is energized in response to a signal sent from the CPU (al) via the board.
従来の印字装置では、通電時間制御が以上のように行な
われていたので、サーマルヘッドへの通電時間を求める
ために必要な温度検出を第１行目でしか行なわないため
、第２行目以降の印字だめの通電によりサーマルヘッド
の温度はさらに上昇しているにもかかわらず、第１行目
で検出した温度に対応する制御をひき続き行なうため従
って適正な制御が行われないという問題点、又、通常の
場合、印字周期はほとんど変化しないので、第６図に示
されるように印字行数が増えても通電時間は一定のまま
であるため、第り図に示されるようにサーマルヘッドの
温度は上昇し続け、通電過剰となり、印字品質が低下す
るという問題点があった。In conventional printing devices, the energization time is controlled as described above, so the temperature detection required to determine the energization time to the thermal head is performed only in the first line; Although the temperature of the thermal head has further increased due to the energization of the printing reservoir, the control corresponding to the temperature detected in the first line continues to be performed, so that proper control is not performed. In addition, in normal cases, the printing cycle hardly changes, so even if the number of printed lines increases as shown in Figure 6, the energization time remains constant. There was a problem in that the temperature continued to rise, resulting in excessive energization and a decrease in print quality.
この発明はこのような問題点を解決するためになされた
もので、サーマルヘッドへの通電過剰ヲ防ぎ、印字品質
の向上された印字装置のための通電時間制御方法を得る
ことを目的とする。The present invention has been made to solve these problems, and an object of the present invention is to provide a method for controlling the energization time for a printing device that prevents excessive energization of the thermal head and improves print quality.
この発明に係るデータ処理装置のためのヘッドの通電時
間制御方法は、７行分毎の実印字ドツト数から累積数を
算出しこれを記憶する累積記憶手段を備える印字装置で
あって、或る行を印字する際にそれまでの累積数とその
時点での上述の印字装置に設けられたヘッドの温度との
関係から上述のヘッド忙対する、上述の或る行の印字の
ための通電時間の補正値を得て、この補正値を印字終了
したばかりの行の通電時間から減算し、上述の或る行を
印字するためにこの減算結果に応じた通電時間でに上述
のヘッドを制御するものである。A head energization time control method for a data processing device according to the present invention is a printing device equipped with a cumulative storage means for calculating and storing a cumulative number from the number of actual printed dots for every seven lines, When printing a line, from the relationship between the cumulative number of lines and the temperature of the head installed in the above-mentioned printing device at that point, the current application time for printing a certain line can be calculated based on the relationship between the cumulative number of lines and the temperature of the head installed in the printing device at that time. A device that obtains a correction value, subtracts this correction value from the energization time of the line that has just finished printing, and controls the above-mentioned head with the energization time according to this subtraction result in order to print the above-mentioned certain line. It is.
この発明においては、印字ドツト数を累積し、その累積
数に応じてサーマルヘッドへ流す電流の通電時間を減少
させ、従って温度上昇を抑制する。In this invention, the number of printed dots is accumulated, and the duration of the current flowing to the thermal head is reduced in accordance with the accumulated number, thereby suppressing the temperature rise.
第１図は第２図に示される印字装置で実行される処理手
順即ちこの発明に係る印字装置のためのヘッドの通電時
間制御方法を示すフローチャート図、第２図はこの発明
を実施する際に使用される印字装置を示すブロック図、
第３図は印字周期と印字ドツト数の交点で示される影響
度が格納されているテーブル（Ａｌの図、第９図は温度
と累積数の交点で示される補正値が格納されて因るテー
ブル（Ｂ１０図、第Ｓ図は従来例及びこの発明で使用さ
れる現在の温度と印字周期の交点で示される、サーマル
ヘッドへの通電時間が格納されているテーブル（ＣＩ）
の図である。第一図Ｖｃ３６いて、（ハ、１３）〜（ｑ
）は上述の従来装置と同一のものであり、（コＡ）はＲ
ＯＭｆ、２１と同様なＲＯＭであり、そして（ｆｌは印
字データのドツト数を計数するカウンタであって信号線
を介してそれぞれインタフェース（ハ、サーマルヘッド
（ｇｌ 、 ＣＰ Ｕｌｇｌに接続されている。FIG. 1 is a flowchart showing the processing procedure executed in the printing device shown in FIG. 2, that is, the head energization time control method for the printing device according to the present invention. a block diagram showing the printing device used;
Figure 3 is a table in which the degree of influence indicated by the intersection of the printing cycle and the number of printed dots is stored (Al's diagram, Figure 9 is a table in which the correction value indicated by the intersection of temperature and cumulative number is stored) (Figure B10 and Figure S are tables (CI) in which the current supply time to the thermal head is stored, which is indicated by the intersection of the current temperature and printing cycle used in the conventional example and the present invention.
This is a diagram. Figure 1 Vc36, (c, 13) ~ (q
) is the same as the conventional device described above, and (core A) is R
OMf is a ROM similar to 21, and (fl is a counter for counting the number of dots of print data, and is connected to the interfaces (c), thermal head (gl, CP Ulgl) via signal lines, respectively.
以下、第１図のフローチャート図に基づいて、上記のよ
うに構成された印字装置のためのサーマルヘッドの通電
時間制御方法について説明する。Hereinafter, a method for controlling the energization time of the thermal head for the printing apparatus configured as described above will be explained based on the flowchart shown in FIG.
まず、ＲＯＭ（コＡ）に格納されている処理プログラム
が起動されると、ステップ（１０）においては従来例と
同様にしてサーマルヘッド（６）の温度を求める。次に
、ステップ（／／）において、第１行目の印字開始から
第二行目の印字に入るまでに要した時間即ち印字周期を
求める（一般に、この印字周期は一定である）。ステッ
プ（／ユ）において、カウンタ（ｆｌに、７行分の実印
字ドツト数を計数させ、ステップ（／３）において第３
図のテーブル（薊を用いて上述の印字周期と上述の実印
字ドツト数の交点で示される影響度（上述のように印字
周期は一定なので実印字ドツト数に比例する）を求める
。次にステップ（ハ・において、この求めた影響度を累
積数としてＲ，１１）（，７１に格納し、ステップ（１
５）において第ｑ図のテーブル（Ｂｌを用いて先に求め
た累積数と温度の交点で示される通電時間の補正値を求
める。ステップ（／６）において従来技術と同様にして
第５図のテーブルｆｃｌから先に求めた印字周期と温度
の交点で示される、第１行目に対する通電時間を求め、
ステップｒｉｑ）ｖｃおいてこれから上述の補正値を減
じることによって、最適な通電時間を求め、その通電時
間で次の第２行目を印字するサーマルヘッドを制御する
。この処理を印字終了となるまで７行毎に行う〔ステッ
プ（７ｇ：）１゜
〔発明の効果〕
この発明は、カウンタにより７行分の実印字ドツト数を
計数し、このカウント数を累積し、その累積数に応じた
補正値を算出し、それを現在の通電時間から減算してそ
の減算結果に応じた温度にサーマルヘッドを制御するよ
うにしたので、第６図のように通電時間を減少させ、第
２図のように温度上昇を抑制することができ、サーマル
ヘッドへの過剰通電を防ぐことができるという効果また
印字品質の高いものが得、られるという効果を有する。First, when the processing program stored in the ROM (core A) is started, in step (10), the temperature of the thermal head (6) is determined in the same manner as in the conventional example. Next, in step (//), the time required from the start of printing on the first line to the start of printing on the second line, that is, the printing cycle is determined (generally, this printing cycle is constant). In step (/3), the counter (fl) counts the number of actual printed dots for 7 lines, and in step (/3), the number of actual printed dots is counted by the counter (fl).
Using the table in the figure (Aji), determine the degree of influence shown by the intersection of the above-mentioned printing cycle and the above-mentioned actual number of printed dots (as mentioned above, the printing cycle is constant, so it is proportional to the actual number of printed dots).Next, step (In C., this calculated degree of influence is stored in R,11)(,71 as a cumulative number, and step (1
In step 5), use the table (Bl) in figure q to find the correction value for the energization time indicated by the intersection of the accumulated number and temperature obtained earlier.In step (/6), similarly to the prior art, the correction value in figure 5 is Find the energization time for the first line, which is indicated by the intersection of the printing cycle and temperature found earlier from table fcl,
In step riq)vc, the above-mentioned correction value is subtracted from this to determine the optimal energization time, and the thermal head that prints the next second line is controlled using the energization time. This process is performed every 7 lines until printing is completed [Step (7g:) 1] [Effects of the Invention] This invention counts the number of actually printed dots for 7 lines using a counter and accumulates this count. , a correction value is calculated according to the cumulative number, and it is subtracted from the current energization time to control the thermal head to a temperature according to the subtraction result, so the energization time can be adjusted as shown in Figure 6. As shown in FIG. 2, the temperature increase can be suppressed, and excessive current to the thermal head can be prevented, and high quality printing can be obtained.
第１図はこの発明に係る印字装置のためのヘッドの通電
時間制御方法を示すフローチャート図、第２図はこの発
明を実施する際に使用される印字装置のブロック図、第
３図は印字−期と印字ドツト数の交点で示される影響度
が格納されているテーブル（４）の図、第９図は或る時
点での温度と累積数の交点で示される補正値が格納され
ているテーブル（Ｂｌの図、第５図は従来例及びこの発
明で使用される或る時点での温度と印字周期の交点で示
される、サーマルヘッドへの通電時間が格納されている
テーブル（ＣｌＯ図、第６図は通電時間と白字行数の関
係を従来例とこの発明について比較した比較図、第７図
は温度と印字行数の関係を従来例とこの発明について比
較した比較図、第５図は従来の通電時制御方法を説明す
るために用いられる印字装置のブロック図である。
図においてｓ （／ＩＦｉインタフェース、ｒコＡ）は
ＲＯＭ、［，７１はＲＡＭ、（ゲ）はＣＰＵ、（５１は
Ａ、−Ｄ変換器、（６）はサーマルヘッド、（ワ）はボ
ート、（＆１はカウンタである。
なお、各図中、同一符号は同−又は和尚部分を示す。
テーブル（Ｃ）
莞６図
莞７図
→増 叩宇行数
手続補正書（自発）FIG. 1 is a flowchart showing a head energization time control method for a printing device according to the present invention, FIG. 2 is a block diagram of a printing device used in carrying out the invention, and FIG. 3 is a printing- Figure 9 shows the table (4) in which the degree of influence indicated by the intersection of the temperature and the number of printed dots is stored, and the table in which the correction value indicated by the intersection of the temperature at a certain point and the cumulative number is stored. (Bl diagram, Figure 5 is a table (ClO diagram, Figure 5) that stores the current supply time to the thermal head, which is indicated by the intersection of temperature and printing cycle at a certain point in time, used in the conventional example and the present invention. Figure 6 is a comparison diagram comparing the relationship between the current application time and the number of white lines for the conventional example and this invention, Figure 7 is a comparison diagram for comparing the relationship between temperature and the number of printed lines for the conventional example and this invention, and Figure 5 is FIG. 2 is a block diagram of a printing device used to explain a conventional power-on control method. In the figure, s (/IFi interface, r code A) is a ROM, are A and -D converters, (6) is a thermal head, (wa) is a boat, and (&1 is a counter. In each figure, the same reference numeral indicates the same - or Japanese priest part. Table (C) Kan 6th figure, 7th figure → increase
Claims (3)
これを記憶する累積記憶手段を備える印字装置であつて
、 或る行を印字する際にそれまでの累積数とその時点での
前記印字装置に設けられたヘッドの温度との関係から前
記ヘッドに対する、前記或る行の印字のための通電時間
の補正値を得て、この補正値を印字終了したばかりの行
の通電時間から減算し、前記或る行を印字するためにこ
の減算結果に応じた通電時間で前記ヘッドを制御するこ
とを特徴とする印字装置のためのヘッドの通電時間制御
方法。(1) Calculate the cumulative number from the actual number of printed dots for each line,
The printing device is equipped with a cumulative storage means for storing this information, and when printing a certain line, the printing device stores information about the head based on the relationship between the cumulative number up to that point and the temperature of the head installed in the printing device at that time. , obtain a correction value for the energization time for printing the certain line, subtract this correction value from the energization time for the line that has just finished printing, and use the correction value to print the certain line according to the result of this subtraction. 1. A method of controlling a current-carrying time of a head for a printing device, characterized in that the head is controlled according to a current-carrying time of a head.
数するカウンタ、当該カウンタから出力されるカウント
数と印字周期の関係から影響度を求め、更にこの影響度
を累積し、累積数として算出する中央処理装置、及び前
記累積数を格納する記憶手段からなることを特徴とする
特許請求の範囲第１項記載の印字装置のためのヘッドの
通電時間制御方法。(2) The cumulative storage means uses a counter that counts the number of actual printed dots per line, determines the degree of influence from the relationship between the count output from the counter and the printing cycle, and further accumulates this degree of influence. 2. A head energization time control method for a printing device according to claim 1, comprising: a central processing unit that calculates the cumulative number; and a storage unit that stores the cumulative number.
及びサーマルヘッドであることを特徴とする特許請求の
範囲第１項記載の印字装置のためのヘッドの通電時間制
御方法。(3) A method for controlling energization time of a head for a printing device according to claim 1, wherein the printing device and the head are a thermal printer and a thermal head, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15878186A JPS6315767A (en) | 1986-07-08 | 1986-07-08 | Head energization time controlling method for printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15878186A JPS6315767A (en) | 1986-07-08 | 1986-07-08 | Head energization time controlling method for printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6315767A true JPS6315767A (en) | 1988-01-22 |
Family
ID=15679191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15878186A Pending JPS6315767A (en) | 1986-07-08 | 1986-07-08 | Head energization time controlling method for printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6315767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02280415A (en) * | 1989-03-17 | 1990-11-16 | John Fluke Mfg Co Inc | Frequency converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856874A (en) * | 1981-09-30 | 1983-04-04 | Sharp Corp | Heat sensitive recording device |
| JPS6120338B2 (en) * | 1978-02-23 | 1986-05-21 | Becton Dickinson Co | |
| JPS61120774A (en) * | 1984-11-17 | 1986-06-07 | Ricoh Co Ltd | Thermal head driver |
-
1986
- 1986-07-08 JP JP15878186A patent/JPS6315767A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120338B2 (en) * | 1978-02-23 | 1986-05-21 | Becton Dickinson Co | |
| JPS5856874A (en) * | 1981-09-30 | 1983-04-04 | Sharp Corp | Heat sensitive recording device |
| JPS61120774A (en) * | 1984-11-17 | 1986-06-07 | Ricoh Co Ltd | Thermal head driver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02280415A (en) * | 1989-03-17 | 1990-11-16 | John Fluke Mfg Co Inc | Frequency converter |
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