JPS6161870A - Thermal printer - Google Patents
Thermal printerInfo
- Publication number
- JPS6161870A JPS6161870A JP18249884A JP18249884A JPS6161870A JP S6161870 A JPS6161870 A JP S6161870A JP 18249884 A JP18249884 A JP 18249884A JP 18249884 A JP18249884 A JP 18249884A JP S6161870 A JPS6161870 A JP S6161870A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- temperature sensor
- head
- output
- converter
- 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
- B41J2/315—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
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ヘッド温度変化による駆動エネルギを補正し
て印字するサーマルプリンタに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal printer that prints by correcting drive energy due to changes in head temperature.
従来、サーマルヘッド内に温度センサを設け、この温度
センサの温度変化に応じて、サーマルヘッドの駆動エネ
ルギを補正し、印字濃度を最適化していた。この場合の
補正値は固定化されていた。Conventionally, a temperature sensor is provided in the thermal head, and the driving energy of the thermal head is corrected in accordance with the temperature change of the temperature sensor, thereby optimizing the print density. The correction value in this case was fixed.
このため、サーマルヘッドを交換した場合、温度センサ
のバラツキ（誤差）により補正が不足又は過度になり、
印字品質に悪影響を与えるという間層があった。Therefore, when the thermal head is replaced, the correction may be insufficient or excessive due to variations (errors) in the temperature sensor.
There was a problem that the printing quality was adversely affected.
本発明はこのような不具合をなくシ、ヘッド交換時ヘッ
ド内の温度センサのバラツキを検出し、自動的に最適な
補正値が得られるようにし、無調整にて高印字品質が得
られるサーマルプリンタを提供するものである。The present invention eliminates such problems, detects variations in the temperature sensor inside the head when replacing the head, and automatically obtains the optimal correction value, thereby providing a thermal printer that can obtain high print quality without adjustment. It provides:
本発明は基準温度センサ１と、該基準温度センサ１の出
力値と、ヘッド温度センサ２の出力値とを比較する比較
回路５と、電源オンタイミング発生回路６と、該電源オ
ンタイミング発生回路６と前記比較回路５の出力により
誤差を記憶する誤差記憶回路７と、該誤差記憶回路７と
前記ヘッド温度センサ２の出力とにより補正値を決定す
る補正データ演算回路８とを有すことを特徴とするサー
マルプリンタである＠
〔作用〕
補正データ演算回路８により、ヘッド交換時にヘッド内
の温度センサのバラツキに基いて最適な補正値を決定し
、その補正値にて最適な印字濃度で印字を行なう。The present invention comprises a reference temperature sensor 1, a comparison circuit 5 for comparing the output value of the reference temperature sensor 1 and the output value of the head temperature sensor 2, a power-on timing generation circuit 6, and a power-on timing generation circuit 6. and an error storage circuit 7 that stores an error based on the output of the comparison circuit 5; and a correction data calculation circuit 8 that determines a correction value based on the error storage circuit 7 and the output of the head temperature sensor 2. [Operation] The correction data calculation circuit 8 determines the optimum correction value based on the variation in the temperature sensor inside the head when replacing the head, and prints with the optimum print density using the correction value. Let's do it.
以下、本発明の実施例を図面を参照して詳細に説明する
。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明装置のブロック図、第２図は動作説明図
を示す・
第１図において、基準温度センサ１は制御部基板（図示
せず）に実装されておシ、温度特性があらかじめわかっ
ておシ、これを基準にして補正データが設定されている
。基準温度センサ１の出力１ａはＡ／Ｄコンバータ３に
入力され、Ａ／Ｄコン・ぐ−夕３の出力３ａは比較回路
５へ入力される。へ。Figure 1 is a block diagram of the device of the present invention, and Figure 2 is an explanatory diagram of its operation. In Figure 1, the reference temperature sensor 1 is mounted on a control board (not shown), and the temperature characteristics are determined in advance. As you know, the correction data is set based on this. The output 1a of the reference temperature sensor 1 is input to the A/D converter 3, and the output 3a of the A/D converter 3 is input to the comparison circuit 5. fart.
ド温度センサ２はサーマルヘッド１１内に実装され、そ
の出力２ａはＡ／Ｄコンバータ４に入力され、Ａ／Ｄコ
ンバータ４の出力４ａは、比較回路５のもう一方の入力
に接続される。比較回路５は基準温度センサｌのＡ／Ｄ
コンバータ出力とヘッド温度センサ２のＡ／Ｄコンバー
タ出力を比較し、その結果を電源オンタイミング発生回
路６の出力６ａが出力した時、誤差記憶回路７へ記憶す
る。電源オンタイミング発生回路６は、電源投入時１回
だけタイミングを発生する回路である。The temperature sensor 2 is mounted inside the thermal head 11, and its output 2a is input to the A/D converter 4, and the output 4a of the A/D converter 4 is connected to the other input of the comparator circuit 5. Comparison circuit 5 is an A/D of reference temperature sensor l.
The converter output is compared with the A/D converter output of the head temperature sensor 2, and the result is stored in the error storage circuit 7 when the output 6a of the power-on timing generation circuit 6 is output. The power-on timing generation circuit 6 is a circuit that generates timing only once when the power is turned on.
誤差記憶回路７の出カフａは補正データ演算回路８へ入
力される。Ａ／Ｄコンバータ４の出力は補正データ演算
回路８のもう一方の入力に接続され、補正データが演算
され、その出力８ａは補正回路９のＰＣＯＮＴ端子へ入
力される。ＰＣＯＮ？端子へ入力される値によって補正
回路９の出力Ｐ０υ丁端子のパルス幅が決定され、これ
がヘッドドライバ１０に加えられ、この間サーマルへラ
ド１１を駆動する。The output a of the error storage circuit 7 is input to the correction data calculation circuit 8. The output of the A/D converter 4 is connected to the other input of the correction data calculation circuit 8 to calculate correction data, and its output 8a is input to the PCONT terminal of the correction circuit 9. PCON? The pulse width of the output terminal P0υ of the correction circuit 9 is determined by the value input to the terminal, and this is applied to the head driver 10, during which time the thermal pad 11 is driven.
以上のような構成において、補正動作がどのようにして
行なわれるかを第２図を参照して説明するＯ
周囲温度が２０℃の時、電源が投入された場合、基準温
度センサ１のＡ／Ｄコンバータ３の出力はＩＩ３”を出
力し、ヘッド温度センサ２のＡ／Ｄコンバータ４の出力
は”５ｎを出力ヂる。これが比較回路５で比較され、そ
の結果″’−２’ （３−５＝−２）が誤差記憶回路７
に記憶される。この状態で印字が開始されると、誤差記
憶回路７の出力”−２”と、２０℃の時のヘッド温度セ
ンサ２のＡ／Ｄコンバータ４の出力″′５＃が補正デー
タ演算回路８で加算され、その結果′３”（−２＋５＝
３）が補正回路９のＰＣＯＮ？端子に加えられる。これ
により補正回路９の出力ＰＯＵＴは＠ＰＷ３ ’のノヤ
ルス巾を出力し、これがヘッドドライバ１０に加えられ
、この期間へラド１１がドライブされる。印字した結果
、サーマルへラド１１が温度上昇して、例えば５０℃に
なったと仮定すると、Ａ／Ｄコンバータ４の出力は１８
”となり、補正データ演算回路８は６”（−２＋８＝６
）を出力する。この結果、補正回路９は基準温度セン
ナと同じ５０℃のパルス巾ＰＷ６を出力し、最適な補正
／’Ｐルス巾が得られる。How the correction operation is performed in the above configuration will be explained with reference to FIG. 2. When the power is turned on when the ambient temperature is 20°C, the The output of the D converter 3 is "II3", and the output of the A/D converter 4 of the head temperature sensor 2 is "5n". This is compared in the comparator circuit 5, and the result is "'-2" (3-5=-2) in the error storage circuit 7.
is memorized. When printing is started in this state, the output "-2" of the error storage circuit 7 and the output "'5# of the A/D converter 4 of the head temperature sensor 2 at 20°C are output to the correction data calculation circuit 8. The result is '3'' (-2+5=
3) Is PCON of correction circuit 9? Added to the terminal. As a result, the output POUT of the correction circuit 9 outputs the Noyals width of @PW3', which is applied to the head driver 10, and the rad 11 is driven during this period. Assuming that as a result of printing, the temperature of the thermal heater 11 rises to, for example, 50°C, the output of the A/D converter 4 will be 18°C.
”, and the correction data calculation circuit 8 is 6” (-2+8=6
) is output. As a result, the correction circuit 9 outputs a pulse width PW6 of 50° C., which is the same as that of the reference temperature sensor, and an optimum correction/'P pulse width can be obtained.
以上のように本発明は、基準温度センサと、比較回路と
、電源オンタイミング発生回路と、誤差記憶回路と、補
正データ演算回路とを設けることにより、ヘッド交換時
の温度センナのバラツキを自動的に補正することができ
る効果を有するものでらる・As described above, the present invention automatically corrects temperature sensor variations when replacing heads by providing a reference temperature sensor, a comparison circuit, a power-on timing generation circuit, an error storage circuit, and a correction data calculation circuit. It has the effect of correcting the
第１図は本発明の一実施例を示すブロック図、第２図は
本発明の一実施例における動作説明図である。
１・・・基準温度センサ、２・・・ヘッド温度センサ、
３・・・Ａ／Ｄコンバータ、４・・・Ａ／Ｄコンバータ
、５・・・比較回路、６・・・電源オンタイミング発生
回路、７・・・誤差記憶回路、８・・・補正データ演算
回路、９・・・補正回路、１０・・・ヘッドドライバ、
１１・・・サーマルヘッド。FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation in one embodiment of the present invention. 1... Reference temperature sensor, 2... Head temperature sensor,
3... A/D converter, 4... A/D converter, 5... Comparison circuit, 6... Power on timing generation circuit, 7... Error storage circuit, 8... Correction data calculation circuit, 9... correction circuit, 10... head driver,
11...Thermal head.
Claims (1)
記ヘッド温度センサの温度変化に応じて、前記サーマル
ヘッドの駆動エネルギを補正回路により変化させて印字
するサーマルプリンタにおいて、基準温度センサと、該
基準温度センサの出力値と前記ヘッド温度センサの出力
値とを比較する比較回路と、電源オン時にタイミング信
号を出力する電源オンタイミング発生回路と、前記比較
回路と前記電源オンタイミング発生回路の出力により誤
差を記憶する誤差記憶回路と、該誤差記憶回路と前記ヘ
ッド温度センサの出力とにより、補正値を決める補正デ
ータ演算回路とを有することを特徴とするサーマルプリ
ンタ。(1) In a thermal printer that includes a head temperature sensor in a thermal head and prints by changing the driving energy of the thermal head using a correction circuit according to a temperature change of the head temperature sensor, a reference temperature sensor and a reference temperature sensor are provided. A comparison circuit that compares the output value of the temperature sensor and the output value of the head temperature sensor, a power-on timing generation circuit that outputs a timing signal when the power is turned on, and an error generated by the outputs of the comparison circuit and the power-on timing generation circuit. What is claimed is: 1. A thermal printer comprising: an error storage circuit that stores the error storage circuit; and a correction data calculation circuit that determines a correction value based on the error storage circuit and the output of the head temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18249884A JPS6161870A (en) | 1984-08-31 | 1984-08-31 | Thermal printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18249884A JPS6161870A (en) | 1984-08-31 | 1984-08-31 | Thermal printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6161870A true JPS6161870A (en) | 1986-03-29 |
Family
ID=16119340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18249884A Pending JPS6161870A (en) | 1984-08-31 | 1984-08-31 | Thermal printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6161870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03140248A (en) * | 1989-10-27 | 1991-06-14 | Canon Inc | Recorder and its thermoregulator |
| JPH08244258A (en) * | 1995-03-15 | 1996-09-24 | Nec Corp | Dot impact printer |
-
1984
- 1984-08-31 JP JP18249884A patent/JPS6161870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03140248A (en) * | 1989-10-27 | 1991-06-14 | Canon Inc | Recorder and its thermoregulator |
| JPH08244258A (en) * | 1995-03-15 | 1996-09-24 | Nec Corp | Dot impact printer |
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