JPH07237314A - High-speed thermal printer - Google Patents

High-speed thermal printer

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Publication number
JPH07237314A
JPH07237314A JP5473094A JP5473094A JPH07237314A JP H07237314 A JPH07237314 A JP H07237314A JP 5473094 A JP5473094 A JP 5473094A JP 5473094 A JP5473094 A JP 5473094A JP H07237314 A JPH07237314 A JP H07237314A
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JP
Japan
Prior art keywords
printing
pulse signal
high
heating elements
dot
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
Application number
JP5473094A
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Japanese (ja)
Inventor
Kazuo Nakamura
一雄 中村
Original Assignee
Nippon Signal Co Ltd:The
日本信号株式会社
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 Nippon Signal Co Ltd:The, 日本信号株式会社 filed Critical Nippon Signal Co Ltd:The
Priority to JP5473094A priority Critical patent/JPH07237314A/en
Publication of JPH07237314A publication Critical patent/JPH07237314A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To perform high-speed printing with an appropriate printing density even at a low temperature by a method wherein when next printing data is a black dot, a preheating pulse signal to a white dot is generated in addition to a current-carrying pulse signal to a black dot even if present printing data is a white dot.
CONSTITUTION: A plurality of heating elements 1 for printing are provided. An electric current is carried to the heating elements 1 on the basis of a predetermined pulse signal to heat the same. This high-speed thermal printer is provided with a printing control circuit 3, in which when next printing data is a black dot, a preheating pulse signal to a white dot is generated in addition to a current-carrying pulse signal to a black dot even if present printing data is a white dot, whereby an instruction of passing an electric current to the printing heating elements 1 is given for every printing heating element 1. By this simple construction, high-speed printing with an appropriate printing density can be performed even at a low temperature.
COPYRIGHT: (C)1995,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、サーマルプリンタの印字方式、特に発熱体の温度不足を招き易い高速印字や低温印字時における印字用の発熱体の温度上昇を適切に制御することができる高速サーマル印刷装置に関するものである。 BACKGROUND OF THE INVENTION This invention provides a printing method of thermal printer, high-speed can be suitably controlled temperature rise of the heating element for printing, especially when easily high-speed printing and low-temperature printing leads to insufficient temperature of the heating element it relates thermal printing device.

【0002】 [0002]

【従来の技術】図3は従来の印字方式における通電パルスと印字ドットの範囲の関係を示す説明図である。 BACKGROUND ART FIG. 3 is an explanatory diagram showing a relationship between a range of printed dots and energizing pulses in a conventional printing method. この説明図からもわかるように従来においては白ドットの次の黒ドットに対する通電時間幅を黒ドットの範囲一杯にまで延ばして規定温度まで上昇させるようにしている。 And to raise the next conduction time width to the black dots of white dots to the prescribed temperature is extended to the full range of black dots in the conventional As can be seen from this illustration.

【0003】 [0003]

【発明が解決しようとする課題】しかし、印字速度が遅いときには、この方式においても発熱体を規定温度にまで上昇させることができたが、近年要請されるようになってきた高速印字に対しては、印字周期(1ドットの印字に要する時間)が短くなることからこの印字周期に対応する通電時間幅を印字ドットの範囲一杯に延ばしても発熱体を規定温度にまで上昇させることができない事態が生じる。 [SUMMARY OF THE INVENTION However, when the printing speed is slow, but also able to increase the heating elements to a specified temperature in this manner, with respect to high-speed printing, which has become in recent years is requested can not be raised to the prescribed temperature a cup to extend even heating elements range from the conduction time width print dots corresponding to the print cycle since the shorter (the time required for printing one dot) printing cycle situation It occurs.

【0004】この発熱体の温度上昇の不足は、印字に際し適切な印字濃度(品位)が得られないという不都合が生じてしまうという問題もあった。 [0004] lack of temperature rise of the heating element, there is a problem that disadvantage that adequate printing density (quality) can be obtained upon printing occurs.

【0005】この問題に対し予め発熱体を温めておくことも考えられるが、このようにするためには昇温用のヒータを別に設けなくてはならず、その構成が複雑になってしまう等の問題があった。 [0005] Although it is conceivable to Preheat previously heating element to this problem must not not be provided separately from the heater for heating in order to thus, like the configuration becomes complicated there was a problem.

【0006】本発明は、このような課題を解決するためなされたもので、その目的は簡単な構成で低温時においても適切な印字濃度を有する高速印字を行うことのできる高速サーマル印刷装置を提供することにある。 [0006] The present invention has been made to solve such problems, it provides a high-speed thermal printing apparatus the purpose of which is capable of performing high-speed printing with an appropriate printing density even at low temperatures with a simple structure It is to.

【0007】 [0007]

【課題を解決するための手段】上記課題を解決するため本発明に係る高速サーマル印刷装置の印字方式は、印字用の発熱体(1,1)を複数有し、所定のパルス信号に基づいて前記各印字用発熱体(1,1)に通電しこれを発熱させるサーマルプリンタにおいて、次回の印字データが黒ドットであるときには、今回の印字データが白ドットであっても、黒ドットに対する通電パルス信号以外に白ドットに対する予熱パルス信号を形成し、これにより各印字用発熱体(1,1)への通電を各印字用発熱体(1,1)ごとに指令する印字制御回路(3)を設けるようにした。 Printing method of high-speed thermal printing apparatus according to the present invention for solving the above problems SUMMARY OF THE INVENTION The heating element for printing (1,1) has a plurality, based on a predetermined pulse signal in a thermal printer to generate heat which was energized to the each printing heating elements (1,1), when the next print data is black dots, also this print data is a white dot, energizing pulses for black dots the preheat pulse signal for a white dot is formed in addition to the signal, thereby printing control circuit power supply to the respective printing heating elements (1,1) directs each printing heating elements (1, 1) to (3) It was provided.

【0008】 [0008]

【作用】本発明に係るサーマルプリンタの印字方式は、 Printing method of a thermal printer according to the present invention,
図2からわかるように、白ドット(白地部分)の次が黒ドット(斜線部分)であるときには、印字用発熱体(1,1)に対する通電時間幅を従来のように黒ドットだけの範囲止らず、従来において通電しなかった白ドットの範囲まで広げて予熱パルスを与える。 As can be seen from Figure 2, when the next white dots (white portion) is black dot (hatched portion) is in the range stop et energization duration only black dots as in the prior art for printing the heating element (1, 1) not give preheat pulse spread to the range of the white dots not energized in the prior art. 従って、高速印字においても規定の印字温度に達し、印字むらが生じることがない。 Therefore, even reached the specified print temperature in high-speed printing, never printed uneven.

【0009】 [0009]

【実施例】以下、本発明の一実施例を添付図面に基づいて説明する。 EXAMPLES The following will be described with reference to the accompanying drawings of an embodiment of the present invention. 図1は本発明に係る高速サーマル印刷装置の印字方式の一実施例を示すブロック図である。 Figure 1 is a block diagram showing an embodiment of a printing system of high-speed thermal printing apparatus according to the present invention.

【0010】図1に示した実施例は、複数の印字用発熱体(1,1)が列長に配設されたサーマルヘッド(2) [0010] embodiment shown in FIG. 1, a thermal head in which a plurality of printing heating elements (1,1) are arranged in the column length (2)
を有している。 have. この印字用発熱体(1,1)に対しては、入力する印字データを処理して各々の印字用発熱体(1,1)を通電させるための印字制御回路(3)が設けられている。 For this printing heating elements (1,1), the printing control circuit for energizing each printing heating element to process the print data to be input (1, 1) (3) is provided .

【0011】前記印字制御回路(3)は、A/D変換器等からなるインタフェース回路(4)、サーマルプリンタ全体を制御する制御回路(5)、および制御パルス発生回路(6)を備える。 [0011] The printing control circuit (3) includes an interface circuit (4) comprising an A / D converter, and a control circuit for controlling the entire thermal printer (5), and the control pulse generation circuit (6).

【0012】前記制御回路(5)は、コンピュータ等から出力される複数ラインの印字データを、入力インタフェース回路(4)を介して受け取り、制御パルス発生回路(6)へ出力する。 [0012] The control circuit (5), the print data of a plurality of lines output from a computer or the like, receives via the input interface circuit (4), and outputs to the control pulse generating circuit (6).

【0013】この制御回路(5)は、中央処理装置(以下、CPUと称する)(7)、ROM(8)、RAM [0013] The control circuit (5) includes a central processing unit (hereinafter, referred to as CPU) (7), ROM (8), RAM
(9)等から構成されている。 And a (9) or the like. そしてCPU(7)はR And CPU (7) is R
OM(8)に予め格納されているプログラムにしたがって後述するような所定の演算・制御を行う。 According to pre-stored with a program to OM (8) performs a predetermined operation and control, as described below.

【0014】CPU(7)は、RAM(9)から今回の印字ラインの印字信号および次回の印字ラインの印字信号を入力し、今回の印字ラインの印字信号を印字データとして制御パルス発生回路(6)を構成するシフトレジスタ(10)へ出力する。 [0014] CPU (7) receives the print signal and print signal of the next print line of the current print line from RAM (9), the control pulse generating circuit print signal of the current print line as the print data (6 ) to the shift register (10) constituting the.

【0015】また、このCPU(7)は、次回の印字ラインの印字信号と今回の印字ラインの印字信号をドットごとに比較し、今回の印字ラインが白ドットで、これに対応する次回の印字ラインが黒ドットのとき、このことを示す補助パルス発生用の信号を制御パルス発生回路(6)を構成するパルス幅制御回路(11)へ出力する。 Further, the CPU (7) compares the print signal and print signal of the current print line of the next printing line for each dot, in this printing line white dot, the next print corresponding thereto when the line is black dots, and outputs the pulse width control circuit constituting the signal control pulse generating circuit for the auxiliary pulse generating indicate this (6) (11).

【0016】前記制御パルス発生回路(6)は、前述したシフトレジスタ(10)、前述したパルス幅制御回路(11)、ラッチ回路(12)およびナンドゲート回路(13)を有している。 [0016] The control pulse generating circuit (6) includes a shift register as described above (10), and a pulse width control circuit described above (11), a latch circuit (12) and the NAND gate circuit (13).

【0017】シフトレジスタ(10)は、CPU(7) [0017] The shift register (10), CPU (7)
からの適宜タイミングのクロック信号に同期して印字データをシリアル入力し、これをパラレル出力する。 In synchronization with the clock signal of appropriate timing to the serial input of the print data from which the to parallel output.

【0018】前記ラッチ回路(12)は、CPU(7) [0018] The latch circuit (12), CPU (7)
からのラッチ信号によって、シフトレジスタ(10)から印字データを1ライン分ラッチするものである。 By a latch signal from, it is to one line latched print data from the shift register (10).

【0019】前記パルス幅制御回路(11)は、補助パルス発生用の信号を受けたとき、今回の印字ラインに対応するドットごとに、通常の通電時間よりも短い幅のパルスを形成し、ナンドゲート部(13)の各ナンドゲートへ出力する。 [0019] The pulse width control circuit (11) when receiving the signal for the auxiliary pulse generator for each dot corresponding to the current printing line to form a short width pulse than the normal conduction time, the NAND gate output to the NAND gate parts (13).

【0020】前述したように、発熱体(1,1)の各々の一端には、+Vの駆動電圧が印加されているが、その他端はナンドゲート部(13)の各ナンドゲートの出力端へ接続している。 [0020] As described above, each of the one end of the heating element (1, 1), + the driving voltage V is applied, and the other end connected to the output of the NAND gate NAND gate (13) ing. このナンドゲートの各々の入力端にはパルス幅制御回路(11)の出力が印加され、他方の入力端には印字データをラッチするラッチ回路(12) The output of the pulse width control circuit (11) is applied to each input terminal of the NAND gate, the latch circuit to the other input terminal for latching the print data (12)
からのデータ信号が各々供給されるようになっている。 Data signals from is adapted to each be supplied.

【0021】そして、CPU(7)は、対応する各印字用発熱体(1,1)にパルス幅制御回路(11)で形成した所望の時間幅の通電パルスを出力してこれを駆動し、印字用発熱体(1,1)から構成されるサーマルヘッド(2)を規定温度まで上昇させる。 [0021] Then, CPU (7) drives it outputs a current pulse having a desired time width formed by the pulse width control circuit (11) in each printing heating elements (1,1) corresponding, a thermal head (2) consists of printing heating elements (1,1) is raised to the specified temperature.

【0022】上記構成における、本実施例の動作を説明する。 [0022] in the above configuration, the operation of this embodiment will be described. 先ず、RAM(9)に印字データが記憶される。 First, print data is stored in the RAM (9).
そして、RAM(9)から今回の印字データが読み出され、シフトレジスタ(10)へ1ライン総て転送される。 Then, read the current print data from the RAM (9), are transferred one line all the shift register (10).

【0023】転送終了後、CPU(6)からラッチ信号が出力され、転送された今回の印字データがラッチされる。 [0023] After the transfer, the latch signal is outputted from the CPU (6), the current print data transferred is latched.

【0024】今回の印字データがラッチされると同時に、RAM(9)に記憶されている次回の印字データと比較され、白ドットから黒ドットに変るドットがあるときには予熱パルス発生用の信号をパルス幅制御回路(1 [0024] At the same time the current print data is latched and compared with the next print data stored in the RAM (9), the pulse signal for preheating pulses occur when there is a dot change to black dots from white dots width control circuit (1
1)へ出力する。 To output to 1).

【0025】そのため、パルス幅制御回路(11)から印字用発熱体(1,1)を駆動する予熱パルス発生用の信号が出力され、今回の印字ラインの記録時に白ドットの範囲にも通常の印字通電時間よりも短い通電が行なわれる。 [0025] Therefore, the output signal for the warming pulse generator for driving the printing heating elements (1,1) from the pulse width control circuit (11), normal to ranges of white dots when the recording of the current print line short energization is performed than print conduction time.

【0026】以後、次回の印字ラインが今回の印字ラインとなるというように、印字ラインを更新しながらこの動作を繰り返す。 [0026] After that, as of the next print line is this time of the printing line, repeating this operation while updating the printing line.

【0027】すなわち、図2の本考案の印字方式における通電パルスと印字ドットの範囲の関係を示す説明図からもわかるように、本考案においては、白ドット(白地部分)の次が黒ドット(斜線部分)であるときには、印字用発熱体(1,1)に対する通電時間幅を従来のように黒ドットだけの範囲に止まらず、従来においては通電しなかった白ドットの範囲にまで通電範囲を広げてサーマルヘッドの確実な温度上昇を図るようにしている。 [0027] That is, as can be seen from diagram showing a relationship between a range of printed dots and energizing pulses in the present invention of the printing system of Figure 2, in the present invention, the following black dots white dots (white portion) ( when a hatched portion), not stop the energization time width in the range of only black dots as in the prior art for printing the heat generating element (1,1), the energization range to a range of white dots not energized in the conventional spread so that ensuring successful temperature rise of the thermal head.

【0028】なお、この実施例においては白ドットの範囲に印加するパルスと黒ドットの範囲に印加するパルスとを分けて別々に通電したが、これに拘泥するものでないことは勿論である。 [0028] Although energized separately divided and pulse to be applied to a range of pulse and the black dots applied in a range of white dots in this embodiment, it is obvious not intended to be bound thereto.

【0029】 [0029]

【発明の効果】以上説明したように本発明に係るサーマルプリンタの印字方式によれば、黒ドットのみならず白ドットの範囲にかけても通電するようにしたため、印字周期の短い高速印字や低温時における印字においてもヒータ等を使用することなく印字用発熱体を十分に温度上昇させることができ、簡単な構成で適切な印字濃度(品位)を有する高速印字を行うことができる。 According to a printing system of the thermal printer according to the present invention as described in the foregoing, because of the so also energized toward the range of the white dots not black dots only in a short high-speed printing and low temperature of the print cycle also can be sufficiently raising the temperature printing heating element without using a heater or the like in the print, it is possible to perform high-speed printing with an appropriate printing density (quality) with a simple configuration.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明に係る高速サーマル印刷装置の印字方式の一実施例を示すブロック図である。 1 is a block diagram showing an embodiment of a printing system of high-speed thermal printing apparatus according to the present invention.

【図2】本発明の印字方式における通電パルスと印字ドットの範囲の関係を示す説明図である。 FIG. 2 is an explanatory diagram showing a relationship between a range of printed dots and energizing pulses in the printing system of the present invention.

【図3】従来の印字方式における通電パルスと印字ドットの範囲の関係を示す説明図である。 3 is an explanatory diagram showing a relationship between a range of printed dots and energizing pulses in a conventional printing method.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 印字用発熱体 2 サーマルヘッド 3 印字制御回路 4 入力インタフェース回路 5 制御回路 6 制御パルス発生回路 7 中央処理装置(CPU) 8 ROM 9 RAM 10 シフトレジスタ 11 パルス幅制御回路 12 ラッチ回路 13 ナンドゲート部 1 the heating element 2 a thermal head for printing 3 printing control circuit 4 input interface circuit 5 a control circuit 6 controls the pulse generating circuit 7 a central processing unit (CPU) 8 ROM 9 RAM 10 shift register 11 pulse width control circuit 12 latch circuit 13 NAND gate portion

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 印字用の発熱体(1,1)を複数有し、 1. A has a plurality of heating elements for printing (1,1),
    所定のパルス信号に基づいて前記各発熱体に通電しこれを発熱させる高速サーマル印刷装置において、 次回の印字データが黒ドットであるときには、今回の印字データが白ドットであっても、黒ドットに対する通電パルス信号以外に白ドットに対する予熱パルス信号を形成し、これにより前記各印字用発熱体(1,1)への通電を各印字用発熱体(1,1)ごとに指令する印字制御回路(3)を設けたことを特徴とする高速サーマル印刷装置。 In high-speed thermal printing device to generate heat which is energized to the each heating element based on a predetermined pulse signal, when the next print data is black dots, also this print data is a white dot, for black dots the preheat pulse signal for a white dot is formed in addition to energizing pulse signal, thereby printing control circuit for commanding the energization of the respective printing heating elements (1,1) for each printing heating elements (1,1) ( 3) that the provided high-speed thermal printing apparatus according to claim.
JP5473094A 1994-02-28 1994-02-28 High-speed thermal printer Pending JPH07237314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5473094A JPH07237314A (en) 1994-02-28 1994-02-28 High-speed thermal printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5473094A JPH07237314A (en) 1994-02-28 1994-02-28 High-speed thermal printer

Publications (1)

Publication Number Publication Date
JPH07237314A true JPH07237314A (en) 1995-09-12

Family

ID=12978926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5473094A Pending JPH07237314A (en) 1994-02-28 1994-02-28 High-speed thermal printer

Country Status (1)

Country Link
JP (1) JPH07237314A (en)

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