JPS5913353B2 - Kannetsukiruquinjisouchi - Google Patents

Kannetsukiruquinjisouchi

Info

Publication number
JPS5913353B2
JPS5913353B2 JP15808975A JP15808975A JPS5913353B2 JP S5913353 B2 JPS5913353 B2 JP S5913353B2 JP 15808975 A JP15808975 A JP 15808975A JP 15808975 A JP15808975 A JP 15808975A JP S5913353 B2 JPS5913353 B2 JP S5913353B2
Authority
JP
Japan
Prior art keywords
resistance
paper
printing
transistor
voltage
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
Application number
JP15808975A
Other languages
Japanese (ja)
Other versions
JPS5282341A (en
Inventor
幸雄 市川
克典 谷江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15808975A priority Critical patent/JPS5913353B2/en
Publication of JPS5282341A publication Critical patent/JPS5282341A/en
Publication of JPS5913353B2 publication Critical patent/JPS5913353B2/en
Expired legal-status Critical Current

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Description

【発明の詳細な説明】 本発明は、通電感熱方式を用いた印字記録装置において
、印字結果を均一にすることを目的とするものである。
DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to make printing results uniform in a printing and recording apparatus using an electric heat-sensitive method.

通電感熱記録方式は、印字用ヘッドを針状電極とし、そ
の対向電極を十分大きな面積を持つた電極として、その
間に一定の電圧を加えることにより印字を行なうもので
ある。
In the electric thermal recording method, printing is performed by using a needle-like electrode as the printing head and an electrode with a sufficiently large area as the opposing electrode, and applying a constant voltage between them.

この場合紙は通電が5 行われるに適当な抵抗値を持つ
ているのであるが、紙の抵抗値はそのロッドにより異な
沙、又巻始めや巻終り、又湿度等の影響で、甚だしい場
合には2倍近い抵抗値の違いがある。従つて一定電圧で
印字した場合には、紙抵抗の違いにより、紙抵抗10が
大きい場合は印字濃度が薄く、紙抵抗が小さい場合は印
字濃度が濃くなシ、印字結果に濃淡が生じる。本発明で
は、例えば印字の際その都度紙の抵抗値を検出し、抵抗
値が大のときは印加電圧を高く15し、抵抗値が小のと
きは印加電圧を低くすることにより、印字エネルギをほ
ぼ一定にして、印字結果を均一にしようとするものであ
る。
In this case, the paper has an appropriate resistance value for energization, but the resistance value of the paper varies depending on the rod, the start and end of winding, and the influence of humidity, etc. There is a difference in resistance value of almost twice. Therefore, when printing is performed with a constant voltage, due to the difference in paper resistance, if the paper resistance 10 is large, the print density will be low, and if the paper resistance is small, the print density will not be high, resulting in shading in the print result. In the present invention, for example, the resistance value of the paper is detected each time printing is performed, and when the resistance value is large, the applied voltage is increased, and when the resistance value is small, the applied voltage is lowered, thereby reducing the printing energy. This is intended to make the printing result uniform by keeping it almost constant.

第1図は本発明の印字装置の電極部分の構成を示し、A
は斜視図、Bは左側面図、Cは平面図、20Dは正面図
である。
FIG. 1 shows the structure of the electrode part of the printing device of the present invention, and A
20D is a perspective view, B is a left side view, C is a plan view, and 20D is a front view.

これらの図において1は軸2に巻かれた記録用紙、3は
印字用マルチスタイラスヘッド、4は記録用紙1の抵抗
値を検出するための抵抗検出用電極、5はヘッド3及び
電極4に対向して設けられた対向電極で、記録用紙1は
図25の矢印方向に送給され、ヘッド3と電極5との間
に信号電圧が加えられて紙1に印字されるものである。
第2図は本発明の実施例の回路構成を示す。
In these figures, 1 is a recording paper wound around a shaft 2, 3 is a multi-stylus head for printing, 4 is a resistance detection electrode for detecting the resistance value of the recording paper 1, and 5 is opposed to the head 3 and electrode 4. The recording paper 1 is fed in the direction of the arrow in FIG. 25, and a signal voltage is applied between the head 3 and the electrode 5 to print on the paper 1.
FIG. 2 shows a circuit configuration of an embodiment of the present invention.

同図において、6は印字ドライブ回路、Tは紙抵抗30
検出回路ドライバ、8は直流増幅器、9は印字ドライブ
用トランジスタ、10は紙抵抗検出用トランジスタ、1
1はバッファトランジスタ、12はサンプリングFET
スイッチ、13はバッファFET、14、15、16は
印字電圧制御用トラ35 ンジスタ、17はサンプリン
グ制御用FET)18はバッファFET13のゲートク
ランプ用FETである。19は印字ドライブ回路6の負
荷抵抗、20は紙抵抗検出回路ドライバ7の負荷抵抗、
21はトランジスタ9のベース抵抗、22はトランジス
タ10のベース抵抗、23,24は紙抵抗検出比較用抵
抗、25は比較基準調整用可変抵抗器、26はトランジ
スタ11の温度補償用ダイオード、27はトランジスタ
11のベース抵抗、28はトランジスタ11のエミツタ
抵抗兼レベル調整用抵抗、29,30は直流増幅器8の
バイアス抵抗、31は増幅器8の負荷抵抗、32はサン
プリング用コンデンサ、33はパツフアFETl3のソ
ース抵抗、34はトランジスタ14のベース抵抗、35
はトランジスタ14のエミツタ抵抗、36はトランジス
タ14の負荷抵抗兼トランジスタ15のエミツタ抵抗、
37,38はトランジスタ15のバイアス抵抗、39は
トランジスタ15の負荷抵抗兼トランジスタ16のベー
ス抵抗、40はトランジスタ16のバイアス抵抗、41
はトランジスタ16のベースエミツタ間の保護用ダイオ
ードである。
In the same figure, 6 is a print drive circuit, and T is a paper resistor 30.
Detection circuit driver, 8 is a DC amplifier, 9 is a printing drive transistor, 10 is a paper resistance detection transistor, 1
1 is a buffer transistor, 12 is a sampling FET
13 is a buffer FET; 14, 15, 16 are print voltage control transistors; 17 is a sampling control FET; 18 is a gate clamp FET for the buffer FET 13; 19 is a load resistance of the print drive circuit 6; 20 is a load resistance of the paper resistance detection circuit driver 7;
21 is the base resistance of transistor 9, 22 is the base resistance of transistor 10, 23 and 24 are resistors for paper resistance detection comparison, 25 is a variable resistor for comparison reference adjustment, 26 is a temperature compensation diode for transistor 11, 27 is a transistor 11 is the base resistance, 28 is the emitter resistance and level adjustment resistance of the transistor 11, 29 and 30 are the bias resistances of the DC amplifier 8, 31 is the load resistance of the amplifier 8, 32 is the sampling capacitor, and 33 is the source resistance of the puffer FET 13. , 34 is the base resistance of the transistor 14, 35
is the emitter resistance of the transistor 14, 36 is the load resistance of the transistor 14 and the emitter resistance of the transistor 15,
37 and 38 are bias resistors of the transistor 15, 39 are load resistors of the transistor 15 and base resistors of the transistor 16, 40 are bias resistors of the transistor 16, 41
is a protection diode between the base and emitter of the transistor 16.

次に第3図を参照して第2図の回路の動作を説明する。Next, the operation of the circuit shown in FIG. 2 will be explained with reference to FIG.

まず、第3図のKに示す記録紙の抵抗検出信号がゲート
クランプ用FETl8に印加されると、FETl8のド
レイン−ソース間のインピーダンスが低下し、バツフア
FETl3のゲート電位はほぼB2の電位となる。する
とFETl3はD−S間インピーダンスが低下して図の
t点にはB2の電位が供給される。t点がB2の電位に
なると、トランジスタ14はカツトオフし、これにカス
コード接続されたトランジスタ15もカツトオフとなる
。するとトランジスタ16がオンし、対向電極5にはB
3なる負の電位が印加される。この状態で次に紙抵抗検
出回路ドライバTに記録インピーダンスホールド信号f
が加えられると、紙抵抗検出回路ドライバ7がオンし、
これによつてトランジスタ10がオンする。その結果、
B3−トランジスタ16一対向電極5一記録紙1一抵抗
検出用電極4一抵抗24一抵抗23−トランジスタ10
−B1の回路に電流が流れ、可変抵抗器25により分圧
された電圧がバツフアトランジスタ11のベースに加え
られる。これにより、トランジスタ11のベース電圧は
、記録紙1の紙抵抗が大なる時は高く、紙抵抗が小なる
時は低くなる。これによりトランジスタ11のエミツタ
レベルが決定され、更に直流増幅器8により増幅され、
サンプリングFETl2に加えられる。FETl2には
、上述の記録インピーダンスホールド信号fと同期した
サンプリングパルスiが加えられ、iがローレベルの時
導通状態となつて、サンプリング用コンデンサ32には
直流増幅器8の出力電圧が充電される。その後、印字ド
ライブ回路6に記録パルスeが加えられ、同時に記録印
加パルスjがサンプリング制御用FETl7に加えられ
ることにより、印字ドライブ回路6がオンし、その出力
で印字ドライブ用トランジスタ9がオンし、又、サンプ
リング制御用FETl7のD−S間インピーダンスが低
下して、コンデンサ32の電圧がFETl3に加えられ
る。このためFETl3のt点の電位は記録紙1の抵抗
に対応した電圧となり、この電圧に応じてトランジスタ
14,15及び16の導通インピーダンスが決定され、
それによつて紙抵抗に対応した電圧が対向電極5に印加
される。このようにして印字ドライブ回路6に記録パル
スeが加えられる時間T,の間、印字ヘツド3に感熱記
録紙の抵抗値に対応して電圧の変化するパルスが加えら
れて印字が行なわれる。以上が印字の1サイクルで、印
字の都度上述のサイクルを繰り返して、記録紙の抵抗変
化に対応して記録紙に加えられる電圧を変えることによ
)、印字のための記録エネルギをほぼ一定として均一な
印字を得ることができる。
First, when the recording paper resistance detection signal shown at K in FIG. 3 is applied to the gate clamp FET 18, the impedance between the drain and source of the FET 18 decreases, and the gate potential of the buffer FET 13 becomes approximately the potential of B2. . Then, the impedance between D and S of FETl3 decreases, and the potential of B2 is supplied to point t in the figure. When the point t reaches the potential of B2, the transistor 14 is cut off, and the transistor 15 connected to it in cascode is also cut off. Then, the transistor 16 turns on, and the opposite electrode 5 receives B.
A negative potential of 3 is applied. In this state, next, the recording impedance hold signal f is sent to the paper resistance detection circuit driver T.
is applied, the paper resistance detection circuit driver 7 turns on,
This turns on transistor 10. the result,
B3 - Transistor 16 - Opposing electrode 5 - Recording paper 1 - Resistance detection electrode 4 - Resistor 24 - Resistor 23 - Transistor 10
A current flows through the circuit B1, and a voltage divided by the variable resistor 25 is applied to the base of the buffer transistor 11. As a result, the base voltage of the transistor 11 is high when the paper resistance of the recording paper 1 is large, and becomes low when the paper resistance is small. This determines the emitter level of the transistor 11, which is further amplified by the DC amplifier 8,
It is added to sampling FETl2. A sampling pulse i synchronized with the recording impedance hold signal f described above is applied to the FET12, and when i is at a low level, it becomes conductive, and the sampling capacitor 32 is charged with the output voltage of the DC amplifier 8. Thereafter, a recording pulse e is applied to the print drive circuit 6, and at the same time a recording pulse j is applied to the sampling control FET 17, so that the print drive circuit 6 is turned on, and its output turns on the print drive transistor 9. Further, the D-S impedance of the sampling control FET 17 decreases, and the voltage of the capacitor 32 is applied to the FET 13. Therefore, the potential at point t of FETl3 becomes a voltage corresponding to the resistance of recording paper 1, and the conduction impedance of transistors 14, 15, and 16 is determined according to this voltage.
Thereby, a voltage corresponding to the paper resistance is applied to the counter electrode 5. In this manner, during the time period T during which the recording pulse e is applied to the print drive circuit 6, a pulse whose voltage changes in accordance with the resistance value of the thermal recording paper is applied to the print head 3, thereby performing printing. The above is one cycle of printing, and by repeating the above cycle each time printing and changing the voltage applied to the recording paper in response to changes in the resistance of the recording paper), the recording energy for printing is kept almost constant. Uniform printing can be obtained.

なお、上述の実施例では、紙抵抗値に応じて印加電圧を
変化させるものとしたけれども、これに代えて紙抵抗値
に応じて通電電流を変化孜せ、即ち、紙抵抗値が大きい
ときには通電電流を小さくし、紙抵抗値が小さいときに
は通電電流を大きくして、印字エネルギをほぼ一定に制
御することもできる。
In the above embodiment, the applied voltage was changed according to the paper resistance value, but instead of this, the applied current was changed according to the paper resistance value, that is, when the paper resistance value was large, the energization was stopped. It is also possible to control the printing energy to be approximately constant by reducing the current and increasing the current when the paper resistance value is small.

本発明によれば、記録紙の巻始め巻終)による抵抗値の
差、記録用紙のロッドによる抵抗値のばらつき、湿度に
よる抵抗値の変化等に対して常に一定濃度の印字結果を
得ることが出来る。
According to the present invention, it is possible to always obtain a printing result with a constant density despite differences in resistance values due to the start and end of the recording paper, variations in resistance due to the rod of the recording paper, changes in resistance due to humidity, etc. I can do it.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の実施例を示し、第1図は印字部分の電極配
置の一例で、Aは斜視図、Bは右側面図、Cは平面図、
Dは正面図、第2図は回路接続の一例、第3図はその動
作説明図である。 1・・・・・・記録用紙、3・・・・・・マルチスタイ
ラスヘツド、4・・・・抵抗検出用電極、5・・・対向
電極。
The figures show an embodiment of the present invention, and FIG. 1 is an example of the electrode arrangement of the printed part, where A is a perspective view, B is a right side view, and C is a plan view.
D is a front view, FIG. 2 is an example of circuit connection, and FIG. 3 is an explanatory diagram of its operation. DESCRIPTION OF SYMBOLS 1...Recording paper, 3...Multi-stylus head, 4...Resistance detection electrode, 5...Counter electrode.

Claims (1)

【特許請求の範囲】[Claims] 1 加熱記録紙に通電して記録する感熱ヘッドと、加熱
記録紙に通電して加熱記録紙の電気抵抗を検出する抵抗
検出用電極と、前記抵抗検出用電極に一定電圧を加えて
加熱記録紙の電気抵抗に対応する電圧を検出しこれを印
字期間保持する紙抵抗検出手段と、前記紙抵抗検出手段
に保持された電圧に対応して感熱ヘッドに加えられる印
字エネルギを一定に制御する印字エネルギ制御手段とを
具え、印字の都度、前記抵抗検出用電極に通電して紙抵
抗検出手段に紙抵抗に対応する電圧を検出して後、前記
印字エネルギ制御手段を介して感熱ヘッドに通電して印
字することを特徴とする感熱記録印字装置。
1 A thermal head that records by applying electricity to heated recording paper, a resistance detection electrode that applies electricity to heated recording paper to detect the electrical resistance of the heated recording paper, and a heating recording paper that applies a constant voltage to the resistance detection electrode. paper resistance detection means for detecting a voltage corresponding to the electrical resistance of the paper resistance and holding it for a printing period; and a printing energy for controlling the printing energy applied to the thermal head at a constant level in response to the voltage held by the paper resistance detection means. and a control means, each time printing is performed, the resistance detection electrode is energized and the paper resistance detection means detects a voltage corresponding to the paper resistance, and then the thermal head is energized via the printing energy control means. A thermal recording printing device characterized by printing.
JP15808975A 1975-12-29 1975-12-29 Kannetsukiruquinjisouchi Expired JPS5913353B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15808975A JPS5913353B2 (en) 1975-12-29 1975-12-29 Kannetsukiruquinjisouchi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15808975A JPS5913353B2 (en) 1975-12-29 1975-12-29 Kannetsukiruquinjisouchi

Publications (2)

Publication Number Publication Date
JPS5282341A JPS5282341A (en) 1977-07-09
JPS5913353B2 true JPS5913353B2 (en) 1984-03-29

Family

ID=15664047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15808975A Expired JPS5913353B2 (en) 1975-12-29 1975-12-29 Kannetsukiruquinjisouchi

Country Status (1)

Country Link
JP (1) JPS5913353B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0347014Y2 (en) * 1984-02-10 1991-10-04

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2528642Y2 (en) * 1990-07-26 1997-03-12 株式会社リコー Printer device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0347014Y2 (en) * 1984-02-10 1991-10-04

Also Published As

Publication number Publication date
JPS5282341A (en) 1977-07-09

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