JPS58151267A - Thermal head driving device - Google Patents
Thermal head driving deviceInfo
- Publication number
- JPS58151267A JPS58151267A JP3482882A JP3482882A JPS58151267A JP S58151267 A JPS58151267 A JP S58151267A JP 3482882 A JP3482882 A JP 3482882A JP 3482882 A JP3482882 A JP 3482882A JP S58151267 A JPS58151267 A JP S58151267A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- thermal head
- recording
- head
- temperature
- 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.)
- Granted
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
-
- 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
Abstract
Description
【発明の詳細な説明】
本発明は、サーマルヘッド駆動装置に関するものである
。従来のサーマルヘッド駆動タイミングとそのサーマル
ヘッドの温度特性を第１図に示す。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal head driving device. FIG. 1 shows the conventional thermal head drive timing and the temperature characteristics of the thermal head.
Ｔはサーマルヘッド記録くり返し周期であり、ｔ。T is the thermal head recording repetition period; t.
ｔ２ 、ｔ３はサーマルヘッド駆動用パルス幅を示し、
また０Ａ、θＢは温度を示し、軸は感熱紙が発色しない
温度である。従来のサーマルヘッド駆動においては、感
熱紙に記録する場合あみヘッドを駆動している。t2 and t3 indicate the pulse width for driving the thermal head,
Further, 0A and θB indicate temperature, and the axis indicates the temperature at which the thermal paper does not develop color. In conventional thermal head driving, when recording on thermal paper, a tread head is driven.
この場合、記録を行なわない期間が長く続くと、ヘッド
の温度は下降し続けるため、次に記録しようとする時の
ヘッド温度は低く、またこのヘッド温度は記録を行なわ
ない期間の長さによって異なるため、同一のヘッド駆動
パルス幅ｔ１では安定したヘッド温度のピーク値が得ら
れず、印字濃度もバラつく事になる。この様子を第１図
中に実線で示しである。そこで安定したヘッド温度のピ
ーク値を得るために、従来はｌ要に応じて駆動パルス幅
をｔ２あるいはｔ３（ｔ２１ｔ３＞ｔｌ）に設定してい
る。このときのヘッドの温度特性を破線で示す。しかし
、このようにパルス幅を制御するには、前ラインの画信
号データを記憶しておくなどの必要があり、多くのハー
ドウェアが付随してくるという問題がある。In this case, if the period of not recording continues for a long time, the head temperature will continue to drop, so the head temperature will be low the next time you try to record, and this head temperature will vary depending on the length of the period of not recording. Therefore, a stable peak value of the head temperature cannot be obtained with the same head drive pulse width t1, and the print density also varies. This situation is shown by the solid line in FIG. Therefore, in order to obtain a stable peak value of the head temperature, conventionally, the driving pulse width is set to t2 or t3 (t21t3>tl) depending on the necessity. The temperature characteristics of the head at this time are shown by broken lines. However, in order to control the pulse width in this way, it is necessary to store the image signal data of the previous line, and there is a problem that a lot of hardware is involved.
本発明は上記点に鑑みてなされたもので、記録体ｎ−期
間と白信号記録期間にサーマルヘッド保温用パルスをサ
ーマルヘッドに加えて、サーマルヘッドを採番するよう
にしたものである。本発明における、ヘッド駆動タイミ
ングとヘッド温度特性を第２図に示す。図中Ｔはサーマ
ルヘッド記録くり返し周期であり、ｔｏは周期Ｔにおい
て、記録しない場合でも感熱紙を発色させない程度の温
度にヘッドを保温させておくためのパルスのパルス幅で
あり、またｔｌは記録用パルスのパルス幅であり、θＡ
、θＢはヘッド温度であり、θＢは感熱紙が発色しない
温度である。本発明では、記録を行なわない場合でもパ
ルス幅ｔ０のパルスでヘッドを駆動し、ヘッドを保温し
ておくのである。これにより、次に記録する場合、パル
ス幅ｔ、のパルスでヘッドを駆動しても、ヘッド温度の
ピーク値の変動が少なく安定した印字濃度が得られる。The present invention has been made in view of the above points, and is designed to apply a pulse for keeping the thermal head warm to the thermal head during the recording body n- period and the white signal recording period, and to number the thermal heads. FIG. 2 shows head drive timing and head temperature characteristics in the present invention. In the figure, T is the thermal head recording repetition period, to is the pulse width of the pulse to keep the head at a temperature that does not color the thermal paper even when not recording in the period T, and tl is the recording repetition period. θA is the pulse width of the pulse for
, θB is the head temperature, and θB is the temperature at which the thermal paper does not develop color. In the present invention, even when recording is not performed, the head is driven with a pulse having a pulse width t0 to keep the head warm. As a result, when recording next time, even if the head is driven with a pulse having a pulse width t, a stable print density can be obtained with little fluctuation in the peak value of the head temperature.
また、ヘッド駆動用パルス幅が保温用パルス幅と記録用
パルス幅だけであり、複雑な制御を必要としない。Further, the pulse width for driving the head is only the pulse width for keeping warm and the pulse width for recording, and no complicated control is required.
本発明の具体的な回路構成例を第３図ａ、ｂ。A specific example of the circuit configuration of the present invention is shown in FIGS. 3a and 3b.
Ｃに示す。図中１は論理積ゲート、２は論理和ゲート、
３はサーマルヘッド駆動用回路、４はサーマルヘッド、
６は電源である。また６は論理和ゲート、７は論理積ゲ
ート、８，９は論理積ゲート、１０は論理和ゲートであ
る。Shown in C. In the figure, 1 is an AND gate, 2 is an OR gate,
3 is a thermal head driving circuit, 4 is a thermal head,
6 is a power source. Further, 6 is an OR gate, 7 is an AND gate, 8 and 9 are AND gates, and 10 is an OR gate.
これらの動作について説明する。第３図ａは、画信号と
ブロック選択信号を論理積ゲート１に入力し得られる従
来の駆動用信号と、サーマルヘッド保温用信号の論理和
をゲート２でとり、サーマルヘッド駆動用信号を得る。These operations will be explained. FIG. 3a shows a conventional driving signal obtained by inputting an image signal and a block selection signal to AND gate 1, and a logical sum of a thermal head warming signal and a thermal head driving signal obtained by gate 2. .
この駆動用信号により、サーマルヘッド駆動回路３でサ
ーマルヘッド４を駆動する。その駆動用の電力は電源６
より供給する。Based on this drive signal, the thermal head drive circuit 3 drives the thermal head 4. The driving power is power supply 6
supply more.
第３図すは、画信号とサーマルヘッド保温用信号を論理
和ゲート６に入力し得られる信号とブロック選択信号の
論理積ゲートでサーマルヘッド駆動用信号を得、この駆
動用信号によりサーマルヘッド駆動回路３でサーマル−
＼ラド４を駆動するものであり、その駆動用の電力は電
源６より供給される。In Figure 3, the image signal and the thermal head warming signal are input to the OR gate 6, and the resulting signal is ANDed with the block selection signal to obtain a thermal head driving signal, and this driving signal is used to drive the thermal head. Thermal in circuit 3
It drives the RAD 4, and the driving power is supplied from the power source 6.
第３図Ｃは画信号と記録するブロック選択信号を論理積
ゲート９に入力し、またサーマルヘッド保温用信号と記
録しようとするブロックの前ブロツク選択信号を論理積
ゲート８に入力し、これら論理積ゲート８．９より得ら
れるそれぞれの信号・を論理和ゲート１０に入力しサー
マルヘッド駆動用信号を得る。この駆動用信号によりサ
ーマルヘッド駆動回路３でサーマルヘッド４を駆動する
。In FIG. 3C, the image signal and the block selection signal to be recorded are input to the AND gate 9, and the thermal head warming signal and the previous block selection signal of the block to be recorded are input to the AND gate 8. The respective signals obtained from the product gates 8 and 9 are input to an OR gate 10 to obtain a signal for driving the thermal head. The thermal head drive circuit 3 drives the thermal head 4 using this drive signal.
その駆動用の電力は電源６より供給される。The driving power is supplied from a power source 6.
また、第３図のａ、ｂ、ｃで示した回路構成例における
タイムチャートをそれぞれ第４図、第６図、第６図に示
す。第４図、第６図、第６図において、ｎは１ラインを
ｎｌｌのブロックに分割した場合ブロックの番号であり
（ｎ ＝１ 、２ ｇ ＩＩ＠ＩＩＩＩＩＩＪＴｏは１
ラインを印字するのに要する時間であり、ｔ、は記録用
駆動パルスのパルス幅であり、 ｔｏは保温用駆動パル
スのパルス幅である。まず第４図の１ラインを印字する
期間ちにおいて、画信号が黒信号の場合、記録用の駆動
パルス幅ｔ、で、前ブロツク選択信号期間においても保
温用パルス幅ｔ０でヘッドが駆動され、白信号の場合は
保温用パルス幅ｔ。でヘッドが駆動されている。また、
記録を行なっていない場合、すなわち記録休止期間にお
いても、保温用信号で駆動されている。Further, time charts for the circuit configuration examples shown by a, b, and c in FIG. 3 are shown in FIG. 4, FIG. 6, and FIG. 6, respectively. 4, 6, and 6, n is the block number when one line is divided into nll blocks (n = 1, 2 g II@IIIIIIJTo is 1
It is the time required to print a line, t is the pulse width of the recording drive pulse, and to is the pulse width of the heat retention drive pulse. First, during the printing period of one line in FIG. 4, if the image signal is a black signal, the head is driven with the recording driving pulse width t, and also in the previous block selection signal period with the warming pulse width t0, In the case of a white signal, the pulse width for keeping warm is t. The head is driven by. Also,
Even when no recording is being performed, that is, during a recording pause period, it is driven by the warming signal.
第６図においても、１ライツを印字する期間ちに丸・い
て、画信号が黒信号の場合記録用信号で、白ドツトの場
合は保温用信号でおのおのヘッドが駆動されている。ま
た記録休止期間においても、保温用信号でヘッドは駆動
されている。そして第６図においても、１ラインを印字
する期間Ｔ０において、画信号が黒ドツトの場合ブロッ
ク選択信号期間において記録用信号で駆動され、前ブロ
ツク選択信号期間において保温用信号で駆動される。In FIG. 6 as well, each head is driven by a recording signal when the image signal is a black signal and by a warming signal when it is a white dot during the printing period of one light. Further, even during the recording pause period, the head is driven by the warming signal. Also in FIG. 6, in the period T0 for printing one line, if the image signal is a black dot, it is driven by the recording signal during the block selection signal period, and is driven by the warming signal during the previous block selection signal period.
また画信号が白ドツトの場合、ブロック選択信号期間に
おいて保温信号で駆動される。Further, when the image signal is a white dot, it is driven by a warming signal during the block selection signal period.
なお、前ブロツク選択信号期間において、黒信号期間と
白信号期間で駆動するかしないか区別は、前ブロツク選
択信号を画信号で制御する事により容易に実現できる。It should be noted that in the previous block selection signal period, whether or not to drive in the black signal period and the white signal period can be easily realized by controlling the previous block selection signal with the image signal.
第６図は、黒信号期間と白信号期間を区別したものであ
る。また第４図、第６図、第６図において、記録期間と
休止期間を区別するには、第３図の回路構成例において
ａの場合はフロック選択信号、ｂ、ｃの場合は画信号の
簡単な制御により容易に実現できる。第４図、第６図、
第６図は、それぞれ記録期間と休止期間を区、別して示
したものである。FIG. 6 shows a distinction between a black signal period and a white signal period. In addition, in FIGS. 4, 6, and 6, in order to distinguish between the recording period and the rest period, in the circuit configuration example of FIG. This can be easily achieved through simple control. Figure 4, Figure 6,
FIG. 6 shows the recording period and the rest period separately.
以上説明したように本発明においては、白信号のドツト
のラインが長く続く場合においても、数ラインあるいは
１ラインの場合においても、また記録休止期間において
もヘッド保温用信号でヘッドを駆動するようにしている
ため、記録されない期間の長短にはほとんど影響されず
、またヘッド記録用駆動パルス幅ｔ、を、可変にしなく
ても、安定したヘッド温度のピーク値を得る事ができる
という効果がある。また本発明においては、設定する駆
動用パルス幅が記録用と保温用だけであり、複雑な制御
を行う必要がなく、それらをゲートを通す事で簡単に実
現でき、・・−ドウエアも従来のものに少し手を加える
だけで容易に構成できるという効果がある。また第３図
のＣの回路構成例を用いて実現できる第６図のタイミン
グの駆動は、黒信号の場合はより十分な印字濃度が得ら
れ、また白信号の場合は保温用信号だけであり、熱効率
がよくなっている。また、本発明は従来のダイオードマ
トリックス方式のサーマルヘッド駆動に容易に導入でき
るものである。As explained above, in the present invention, the head is driven with the head warming signal even when the line of white signal dots continues for a long time, several lines or one line, and even during the recording pause period. Therefore, it is almost unaffected by the length of the non-recording period, and a stable peak value of the head temperature can be obtained without making the head recording drive pulse width t variable. In addition, in the present invention, the drive pulse width that is set is only for recording and warming, and there is no need to perform complicated control, and these can be easily realized by passing them through gates. The effect is that it can be easily configured with just a little modification. Furthermore, the driving timing shown in FIG. 6, which can be realized using the circuit configuration example C in FIG. , thermal efficiency is improved. Further, the present invention can be easily introduced into a conventional diode matrix type thermal head drive.
第１図は従来のサーマルヘッド駆動タイミングとヘッド
温度特性を示す図、第２図は本発明におけるサーマルヘ
ッド駆動タイミングとヘッド温度特性を示す図であり、
第３図ａ、ｂ、ｃはおのおの本発明の一実施例における
サーマルヘッド駆動装置のブロック図、第４図は第３図
ａの回路構成例を用いて得られるタイミングチャート、
第６図は第３図すの回路構成を用いて得られるタイミン
グチャート、第６図は第３図Ｃの回路構成例を用いて得
られるタイミングチャートである。
１ 、７ 、８ 、９ 、、、、、、論理積ゲート、２
＃ ６９ｉ ｏ 、、、、、、論理和ゲート、３ 、
、、、、、サーマルヘッド駆動用回路、 ４ 、、、、
、、サーマルヘッド、６０．。
・・・・・・電源Ｏ
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図FIG. 1 is a diagram showing the conventional thermal head drive timing and head temperature characteristics, and FIG. 2 is a diagram showing the thermal head drive timing and head temperature characteristics in the present invention.
3a, b, and c are block diagrams of a thermal head driving device according to an embodiment of the present invention, and FIG. 4 is a timing chart obtained using the circuit configuration example of FIG. 3a,
FIG. 6 is a timing chart obtained using the circuit configuration shown in FIG. 3, and FIG. 6 is a timing chart obtained using the circuit configuration example shown in FIG. 3C. 1 , 7 , 8 , 9 , , , , AND gate, 2
#69i o , , , , OR gate, 3 ,
, , , Thermal head driving circuit 4 , , ,
,, thermal head, 60. .・・・・・・Power supply O Name of agent Patent attorney Toshio Nakao and 1 other person 1st
Figure 2
Claims (1)
と白信号記録期間に前記サーマルヘッド保温用信号をサ
ーマルヘッドに加えてサーマルヘッドを駆動することを
特徴とするサーマルヘッド駆動装置。 （２）サーマルヘッド保温用信号とサーマルヘッド記録
用信号でゲートをとり、サーマルヘッド駆動用信号を得
ることを特徴とする特許請求の範囲第１項記載のサーマ
ルヘッド駆動装置。 （３）画信号とブロック選択信号でゲートをとることで
得られる信号と、サーマルヘッド保温用信号とでゲート
をとりサーマルヘッド駆動用信号を得ることを特徴とす
る特許請求の範囲第２項記載のサーマルヘッド駆動装置
。 （４）サーマルヘッド保温用信号と画信号でゲートをと
ることで得られる信号と、ブロック選択信号上でゲート
をとりサーマルヘッド駆動用信号を得ることを特徴とす
る特許請求の範囲第２項記載のサーマルヘッド駆動装置
。 （６）画信号とブロック選択信号をゲートをとることで
得られる信号と、記録ブロックの前ブロック選択信号期
のサーマルヘッド保温用信号とでゲートをとりサーマル
ヘッド駆動用信号を得ることを特徴とする特許請求の範
囲第２項記載のサーマルヘッド駆動装置。[Scope of Claims] (1) A thermal head characterized in that a signal for keeping the thermal head warm is provided, and the signal for keeping the thermal head warm is added to the thermal head to drive the thermal head during a recording pause period and a white signal recording period. Drive device. (2) A thermal head driving device according to claim 1, wherein a gate is established between a thermal head heat retention signal and a thermal head recording signal to obtain a thermal head driving signal. (3) A signal obtained by gating an image signal and a block selection signal, and a signal for driving a thermal head by gating a signal for thermal head heat retention to obtain a signal for driving the thermal head. thermal head drive device. (4) A signal obtained by gating the thermal head heat retention signal and the image signal, and a signal obtained by gating the block selection signal to obtain the thermal head driving signal. thermal head drive device. (6) A signal obtained by gating the image signal and the block selection signal and a signal for thermal head warming in the previous block selection signal period of the recording block are gated to obtain a signal for driving the thermal head. A thermal head driving device according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3482882A JPS58151267A (en) | 1982-03-04 | 1982-03-04 | Thermal head driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3482882A JPS58151267A (en) | 1982-03-04 | 1982-03-04 | Thermal head driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58151267A true JPS58151267A (en) | 1983-09-08 |
| JPH0372470B2 JPH0372470B2 (en) | 1991-11-18 |
Family
ID=12425053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3482882A Granted JPS58151267A (en) | 1982-03-04 | 1982-03-04 | Thermal head driving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58151267A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273964A (en) * | 1985-09-27 | 1987-04-04 | Toshiba Corp | System for driving thermal printing head |
| JPS62128767A (en) * | 1985-11-30 | 1987-06-11 | Tokyo Electric Co Ltd | Thermal printer |
| JPS62135382A (en) * | 1985-12-10 | 1987-06-18 | Toshiba Corp | Driving system for thermal head |
| JPH01159265A (en) * | 1987-12-16 | 1989-06-22 | Hitachi Ltd | Drive circuit for thermal head |
-
1982
- 1982-03-04 JP JP3482882A patent/JPS58151267A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6273964A (en) * | 1985-09-27 | 1987-04-04 | Toshiba Corp | System for driving thermal printing head |
| JPS62128767A (en) * | 1985-11-30 | 1987-06-11 | Tokyo Electric Co Ltd | Thermal printer |
| JPS62135382A (en) * | 1985-12-10 | 1987-06-18 | Toshiba Corp | Driving system for thermal head |
| JPH01159265A (en) * | 1987-12-16 | 1989-06-22 | Hitachi Ltd | Drive circuit for thermal head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0372470B2 (en) | 1991-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0673990B2 (en) | Thermal transfer printing method | |
| US6034705A (en) | Thermal printer control system | |
| JPS58151267A (en) | Thermal head driving device | |
| JPH0253232B2 (en) | ||
| JPS6349632B2 (en) | ||
| JPS5718276A (en) | Color recording device | |
| JPH0113265B2 (en) | ||
| JPH01153945U (en) | ||
| JPS605196B2 (en) | thermal printing equipment | |
| JPS58201464A (en) | Thermal recording system of facsimile device | |
| JPH04269562A (en) | Thermal head type printer | |
| JPS62220354A (en) | Multi-color thermal recorder | |
| JPS6087069A (en) | Thermal recorder | |
| JPS63161838U (en) | ||
| JPS58222664A (en) | Drive control system of recording head | |
| JPS58166075A (en) | Driving method of thermal head | |
| JPH082658B2 (en) | Printing method of two-color coloring thermal paper | |
| JPS61241165A (en) | Serial-type printer | |
| JPS6036243U (en) | thermal head | |
| JPS62193850A (en) | Multicolor thermal recorder | |
| JPH03133663A (en) | Thermal head driver | |
| JPS62201269A (en) | Multicolor thermal recording apparatus | |
| JPS6195534U (en) | ||
| JPH02153756A (en) | Line thermal head driving apparatus | |
| JPH0256641U (en) |