JPS5926278A - Heat-sensitive recorder - Google Patents
Heat-sensitive recorderInfo
- Publication number
- JPS5926278A JPS5926278A JP57135757A JP13575782A JPS5926278A JP S5926278 A JPS5926278 A JP S5926278A JP 57135757 A JP57135757 A JP 57135757A JP 13575782 A JP13575782 A JP 13575782A JP S5926278 A JPS5926278 A JP S5926278A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- thermal head
- temperature
- copy
- detected
- 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
- B41J2/36—Print density control
-
- 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
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ファクシミリや計算機等に用いられる感熱記
録装置に関し、特にそのサーマルヘッドの過熱による破
損を防止するようにした感熱記録装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording device used in facsimiles, computers, etc., and more particularly to a thermal recording device that prevents damage to its thermal head due to overheating.
一般に、感熱記録装置においては、長時間連続して使用
すると、サーマルヘッドに熱が蓄えら紙、その蓄熱によ
り、サーマルヘッドが過熱状態となって破損する慣れが
あった。In general, in thermal recording devices, when used continuously for a long time, heat accumulates in the thermal head of the paper, and the thermal head becomes overheated and damaged due to the accumulated heat.
これを防止するために、従来は、ヘッド自体あるいはそ
の近傍に温度センサを増刊けておき、記録途中において
徐々にその記録パルス幅、あるいはサーマルヘッドへの
印加電圧を加減させる構成としていた。In order to prevent this, conventionally, a temperature sensor is provided in the head itself or in the vicinity thereof, and the recording pulse width or the voltage applied to the thermal head is gradually adjusted during recording.
この場合、サーマルヘッドの温度を制御することに起因
して記録濃度が変化するが・、かかる変化が、記録原稿
において見た目上、表われないように制御するためには
非常に細かい制御が必要となり、コスト的に高価なもの
になってしまう欠点があった。In this case, the recording density changes due to controlling the temperature of the thermal head, but extremely fine control is required to prevent such changes from appearing visually in the recorded document. However, it has the drawback of being expensive.
そこで1本発明の目的は、1−述の従来例の欠点である
知雑な制御を必要とせず、また一枚の記録原稿中での不
自然な記録濃度の変化をなくすように適νJに構成配置
した感熱記録装置を提供することにある。Therefore, an object of the present invention is to eliminate the need for complicated control, which is the drawback of the conventional example described in 1-1, and to adjust An object of the present invention is to provide a thermosensitive recording device having the following configurations.
以ドに図面を参照して本発明を11¥細に説明する。The present invention will be explained in detail below with reference to the drawings.
第1図は、未発明感熱記録装置のW4成の一例を示し、
ここに、Cは画信号制御部、Q+ lQ21・・・、Q
、1は、画伯゛号制御用トランジスタ、R重。FIG. 1 shows an example of the W4 configuration of an uninvented thermal recording device,
Here, C is an image signal control unit, Q+ lQ21..., Q
, 1 is a transistor for controlling the artist's number, R-type.
R2,・・・、R71は、発熱体の抵抗、Hは複数の発
熱体R1、R2+・・・+RIlを持つサーマルヘッド
である。サーマルヘッドHの近傍あるいはヘッド自体に
は温度センサTSを取すイづけておく。なお、DI+0
2+・・・+DIlは画信号を表わす。R2,..., R71 are resistances of heating elements, and H is a thermal head having a plurality of heating elements R1, R2+...+RIl. A temperature sensor TS is installed near the thermal head H or on the head itself. In addition, DI+0
2+...+DIl represents an image signal.
第2図は、第1図示の画信号制御部の動作を示すフロー
チャートであり、Tma Xは過熱保護制御を行なうべ
き設定温度、 1..12は画信号制御部Cより画信号
制御用トランジスタQ+ 、Q2・・・、Qnに出力さ
れる°両信号のパルス幅であり、1.<1゜である。FIG. 2 is a flowchart showing the operation of the image signal control section shown in FIG. 1, where Tma X is a set temperature at which overheat protection control should be performed; .. 12 is the pulse width of both signals output from the image signal control unit C to the image signal control transistors Q+, Q2, . . . , Qn; 1. <1°.
第3[Δは1本発明によりサーマルへ・ントの過熱保護
制御が行なわれた場合のサーマルヘッドの温度変化を示
すグラフである。The third [Δ is a graph showing the temperature change of the thermal head when the thermal head overheat protection control is performed according to the present invention.
第4図は、画信号制御部Cがら画信号制御用トランジス
タ Q+ lQ21・・・、Qllに出力される画信号
り、 、D2.・・・、Dnが過熱保護制御により変化
することを示すタイミングチャートである。FIG. 4 shows image signals output from the image signal control unit C to image signal control transistors Q+, Q21, . . . , Qll, D2, . . . , is a timing chart showing that Dn changes due to overheat protection control.
第2図のフローチャー1・において、最初の原稿の記録
を始める際、まず、ステップStにおいて、センサ露に
よりヘッドHの初期lAk度を調べ、その温度が設定温
度Tmaxより高ければ、次のステップS2に進んで記
録パルス幅t1で感熱記録を行う。In flowchart 1 of FIG. 2, when starting to record the first document, first, in step St, the initial lAk degree of the head H is checked by sensor dew, and if the temperature is higher than the set temperature Tmax, the next step is started. Proceeding to S2, thermal recording is performed with a recording pulse width t1.
他方、ステップSlにおいて、初期1晶度がTmawよ
り低ければ、ステップS3に進んで、記録パルス幅t2
で感熱記録を行なう。この記録グルメ幅は1枚の原稿中
での変更は行なわない。On the other hand, in step Sl, if the initial crystallinity is lower than Tmaw, the process advances to step S3, and the recording pulse width t2
Perform thermal recording. This recording gourmet width is not changed within one document.
次のステップS4およびS5では、原稿一枚方の記22
が行なわれたか否かを判断し、=一枚の原稿の記録が終
了する。しかして、次のステップS8では次の原稿をま
だ続けて記録する必要があるか否かを判断し、その必要
があれば、再びステップSlに戻って、サーマルヘッド
Hの温度を調べ、それに応じて、次原稿の記録パルス幅
を決定する。In the next steps S4 and S5, the notes 22 on one page of the original are
It is determined whether or not the process has been performed, and recording of one document is completed. In the next step S8, it is determined whether or not it is necessary to continue recording the next document. If so, the process returns to step Sl, checks the temperature of the thermal head H, and responds accordingly. Then, determine the recording pulse width for the next document.
以」−1連続的に、原稿の記録を行なう際には、同様な
手順で行なう。1. When recording the original document continuously, follow the same procedure.
このように、サーマルヘッドHの温度がある温度をに回
る限り、記録パルス幅を常温時のそれより短阜宿するこ
とにより、サーマルへ・ンドHの熱は拡散され、第3図
に示すごとく、設定温度Tmaにの付近で定常状態とな
り、長時間の連続記録を行なっても、サーマルヘッドl
が破損することはない。In this way, as long as the temperature of the thermal head H reaches a certain temperature, by keeping the recording pulse width shorter than that at room temperature, the heat from the thermal head H is diffused, as shown in Figure 3. , the temperature reaches a steady state near the set temperature Tma, and even if continuous recording is performed for a long time, the thermal head l
will not be damaged.
なお、前述の実施例では記録パルス幅を変更することで
ヘッドの過熱を押えるようにしたが、外に、サーマルヘ
ッドへの印加電圧を制御し、記録パルス幅は一定として
も同様な効果を得ることができる。In addition, in the above-mentioned embodiment, the overheating of the head was suppressed by changing the recording pulse width, but in addition, the voltage applied to the thermal head could be controlled to obtain the same effect even if the recording pulse width was constant. be able to.
以上説明したように1本発明によれば、原稿の記録開始
時だけ、ヘッドの温度を調べて記録パルス幅を切変える
のみでよく1回路構成的にも制御的にも簡単な構造で、
実用上、十分なヘッドの過熱の抑制ができる。また1本
発明によれば、一枚の原稿中での急激な濃度の変化をな
くす効果もある。As explained above, according to the present invention, it is only necessary to check the temperature of the head and change the recording pulse width only when recording the document, and the structure is simple in terms of circuit configuration and control.
For practical purposes, overheating of the head can be sufficiently suppressed. Further, according to one aspect of the present invention, there is an effect of eliminating sudden changes in density within a single document.
第1図は本発明感熱記録装置の構成の一例を示すブロッ
ク図、第21えは本発明の主要部であるサーマルヘッド
の過熱保護制御部分の動作子1頭を示すフローチャート
、第3図は連続的に複数枚の原稿を記録した際のサーマ
ルヘンl’の温度変化°の測定例を示すグラフ、第4図
はサーマルヘッドの発熱体を加熱するために画信号制御
部Cより出力される画信号t1および 12を示すタイ
ミングチャートである。
C・・・画信号制御部、
DI +02 +・・・、Dll・・・画イバ号。
Q+ 、Q2 、・・・、Qll・・・画信号制御用ト
ランジスタH・・・サーマルヘッド、
R1+R2+・・・、R7,・・・発熱体、TS・・・
温度センサ。
特 許 出 願 人 キャノン株式会社Vcc
第3図
連続記録原槁枚敷
第4図FIG. 1 is a block diagram showing an example of the configuration of the thermal recording device of the present invention, FIG. Figure 4 is a graph showing an example of measuring the temperature change of the thermal head l' when recording multiple originals. 3 is a timing chart showing signals t1 and t12. C...Picture signal control unit, DI +02 +..., Dll...Picture bar number. Q+, Q2,..., Qll... Image signal control transistor H... Thermal head, R1+R2+..., R7,... Heating element, TS...
temperature sensor. Patent applicant: Canon Co., Ltd.
Claims (1)
、一枚の原稿の記録の開始または終了時ごとに、前記サ
ーマルヘッドの温度に応じて、その後の原稿の記録パル
ス幅を変更するようにしたことを特徴とする感熱記録装
置。A thermal recording device that performs recording using a thermal head is characterized in that each time recording of one document starts or ends, the recording pulse width of subsequent documents is changed depending on the temperature of the thermal head. A thermal recording device.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57135757A JPS5926278A (en) | 1982-08-05 | 1982-08-05 | Heat-sensitive recorder |
US06/516,963 US4510507A (en) | 1982-08-05 | 1983-07-25 | Thermal recording apparatus |
DE3327904A DE3327904C2 (en) | 1982-08-05 | 1983-08-02 | Thermal recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57135757A JPS5926278A (en) | 1982-08-05 | 1982-08-05 | Heat-sensitive recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5926278A true JPS5926278A (en) | 1984-02-10 |
Family
ID=15159144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57135757A Pending JPS5926278A (en) | 1982-08-05 | 1982-08-05 | Heat-sensitive recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5926278A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS493209A (en) * | 1972-04-25 | 1974-01-12 | ||
JPS54655A (en) * | 1977-06-03 | 1979-01-06 | Kyowa Electronic Instruments | Connecting terminal for distorsion gauge |
-
1982
- 1982-08-05 JP JP57135757A patent/JPS5926278A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS493209A (en) * | 1972-04-25 | 1974-01-12 | ||
JPS54655A (en) * | 1977-06-03 | 1979-01-06 | Kyowa Electronic Instruments | Connecting terminal for distorsion gauge |
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