JP2668120B2 - Thermal line head - Google Patents
Thermal line headInfo
- Publication number
- JP2668120B2 JP2668120B2 JP7068488A JP7068488A JP2668120B2 JP 2668120 B2 JP2668120 B2 JP 2668120B2 JP 7068488 A JP7068488 A JP 7068488A JP 7068488 A JP7068488 A JP 7068488A JP 2668120 B2 JP2668120 B2 JP 2668120B2
- Authority
- JP
- Japan
- Prior art keywords
- head
- thermal line
- signal
- driving
- energization
- 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 - Fee Related
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
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、サーマル・ライン・ヘッドの制御信号の構
成及び駆動方法の改良に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of a control signal for a thermal line head and an improvement in a driving method.
本発明は、多分割駆動を行うサーマル・ライン・ヘッ
ドにおいて印字データを保持するためのラッチ信号を分
割されたブロック毎に独立して制御できるように構成
し、それに適したヘッド駆動方法を行う事により、１ド
ット毎に２段階のヘッド通電巾を与える事で印字品質の
向上を容易に実現させるものである。The present invention provides a thermal line head that performs multi-division driving so that a latch signal for holding print data can be controlled independently for each divided block, and a head driving method suitable for that is performed. Thus, the print quality can be easily improved by giving a two-step head power width for each dot.
従来、サーマル・ライン・ヘッドは第５図のようにヘ
ッドの印字データを保持するためのラッチ信号が１本で
あり、どの分割ブロックにも接続されていたため、第６
図のようなヘッド駆動タイミングチャートにより、基本
的には１段階のヘッド通電巾しか使えなかった。Conventionally, the thermal line head has one latch signal for holding print data of the head as shown in FIG. 5 and is connected to any divided block.
According to the head drive timing chart as shown in the figure, basically, only one stage power supply width can be used.
そのため、グラフィック印字を行うとヘッドの同じド
ットの通電を繰り返し行う場合が多く、第７図のように
ヘッドの温度が上昇し、蓄熱が問題となりやすかった。
又、ヘッドが蓄熱しないようにヘッドの通電巾を短くす
ると、ヘッドの温度の上昇が十分でなく、印字品質を満
足させる事ができなかった。Therefore, when graphic printing is performed, energization of the same dot of the head is often repeated, and the temperature of the head increases as shown in FIG. 7, and heat storage tends to be a problem.
Further, if the width of the power supply to the head is shortened so that the head does not accumulate heat, the temperature of the head is not sufficiently increased and the print quality cannot be satisfied.
そこで、ヘッドの通電巾を２段階に分けて、第８図の
ように、前のドットを印字した場合は１回目の通電を行
わず、２回目だけを通電し、又、前のドットを印字しな
かった場合は、１回目,2回目とも通電する方式をとる
と、ヘッド温度の上昇を一定にしやすく、グラフィック
印字のような印字率の高い使用でも満足のいく印字品質
を得ることができることが予想されていた。In view of this, the current supply width of the head is divided into two stages. As shown in FIG. 8, when the previous dot is printed, the first power supply is not performed, and only the second power supply is performed, and the previous dot is printed. If not, if the method of energizing the first time and the second time is adopted, it is easy to keep the rise in head temperature constant, and it is possible to obtain satisfactory print quality even at high printing rate use such as graphic printing. Had been expected.
しかし、従来のラッチ信号が１本の信号構成のサーマ
ル・ライン・ヘッドで上記の２段階のヘッド通電を行う
駆動方法を実現するのは困難であった。However, it has been difficult to realize the conventional driving method of performing the above-described two-stage head energization with a thermal line head having a single latch signal configuration.
そこで本発明では、第１図のようにラッチ信号を分割
ブロック毎に分け、独立に制御できるように構成し、第
２図のような駆動方法を考案した。Therefore, in the present invention, the latch signal is divided into divided blocks as shown in FIG. 1 so as to be controlled independently, and a driving method as shown in FIG. 2 is devised.
第１図は本発明のヘッド制御信号の構成を説明したも
のである。FIG. 1 illustrates the structure of a head control signal according to the present invention.
まず、シフト・レジスタに１回目のヘッド通電用印字
データを転送し、その後、全分割ブロックのラッチ信号
（▲▼〜▲▼）を出力し、デ
ータ・ラッチ・レジスタへデータを移す。さらに、２回
目のヘッド通電用印字データの転送を行い、シフト・レ
ジスタにそのデータを置いておく。そして１分割ブロッ
クづつ独立に、１回目のヘッド通電（▲▼
信号による）、ラッチ（▲▼信号）、２回目
のヘッド通電（▲▼信号）を行う事によ
り、連続した２段階のヘッド通電が可能となる。（第２
図） 〔実施例〕 第３図は本発明に基づいた４分割駆動のサーマル・ラ
イン・ヘッドの信号構成図であり、ｄ〜ｇはヘッド駆動
用ICである。そしてヘッド駆動用ICは、第１図のように
シフト・レジスタ，データ・ラッチ・レジスタ，ドライ
バーを含んでいる。さらに、ヘッド駆動用IC、ｄ〜ｇは
それぞれ独立にデータラッチするための信号▲
▼〜▲▼、ヘッドの発熱体ｃに通電す
るための信号▲▼〜▲▼
を持っている。First, the first print data for energizing the head is transferred to the shift register, and thereafter, the latch signals (▼ to ▲) of all the divided blocks are output, and the data is transferred to the data latch register. Further, the second transfer of the print data for energizing the head is performed, and the data is stored in the shift register. The first head energization (▲ ▼) is performed independently for each divided block.
Signal, a latch (（signal), and a second head energization (▲ signal) enable continuous two-stage head energization. (Second
FIG. 3 is a signal configuration diagram of a four-part drive thermal line head according to the present invention, and d to g are head driving ICs. The head driving IC includes a shift register, a data latch register, and a driver as shown in FIG. Further, the head driving ICs d to g each independently have a signal ▲ for latching data.
▼ to ▲ ▼, signals for energizing the heating element c of the head ▲ ▼ to ▲ ▼
have.
又、第４図は本発明のヘッドを駆動するためのタイミ
ングチャート例である。FIG. 4 is an example of a timing chart for driving the head of the present invention.
以下、上記タイミングチャートをもとに駆動方法を説
明する。Hereinafter, the driving method will be described based on the above timing chart.
まず、ヘッド駆動用ICに対して１回目のヘッド通電用
印字データｈを転送クロック（CLOCK）により転送す
る。その後、▲▼〜▲▼を同
時に出力し、ヘッド駆動用IC、ｄ〜ｇ内のデータ・ラッ
チ・レジスタに移す。さらに２回目のヘッド通電用印字
データｉを転送する。この段階で、サーマル・ライン・
ヘッドには１回目のヘッド通電用印字データｈが、デー
タ・ラッチ・レジスタに、２回目のヘッド通電用印字デ
ータｉが、シフト・レジスタに入っている。そして、ヘ
ッド通電信号▲▼を有効にし、第１ブロ
ックの１回目の通電ｊが行われる。通電ｊの終了と同時
に▲▼信号を出力しヘッド駆動用IC、ｄ内
のシフト・レジスタのデータｉをデータ・ラッチ・レジ
スタに移し、ヘッド通電信号▲▼を出力
し、第１ブロックの２回目の通電ｋを行う。さらに、第
２〜第４ブロックも同様に行う。First, the first head energizing print data h is transferred to the head driving IC by the transfer clock (CLOCK). After that, ▲ ▼ to ▲ ▼ are simultaneously output and transferred to the data latch register in the head driving IC, d to g. Further, the second print data i for energizing the head is transferred. At this stage, the thermal line
The print data h for the first energization of the head is stored in the head, the print data i for the second energization of the head is stored in the data latch register. Then, the head energization signal {circle around (1)} is validated, and the first energization j of the first block is performed. Simultaneously with the end of energization j, a signal ▲ ▼ is output to move the data i in the shift register in the head driving IC, d to the data latch register, and the head energization signal ▲ ▼ is output. Energization k is performed. Further, the second to fourth blocks are similarly performed.
この手順によって、連続的に２段階の通電制御が可能
となる。This procedure enables continuous two-stage energization control.
上記の説明により、本発明は次の効果を提供できる。 According to the above description, the present invention can provide the following effects.
（１）サーマル・ライン・ヘッドの信号線の構成と駆動
方法の改良のみによるため、特殊なヘッド駆動用ICを開
発することなく、既存のヘッド駆動用ICを使用できる。(1) The existing head driving IC can be used without developing a special head driving IC because only the configuration of the signal line of the thermal line head and the driving method are improved.
（２）ヘッドへのデータ転送に対して大きな負荷をかけ
ずに容易に高印字品質を実現できる。(2) High printing quality can be easily realized without imposing a large load on data transfer to the head.
第１図は本発明のサーマル・ライン・ヘッドの信号構成
の説明図、第２図は本発明のサーマル・ライン・ヘッド
の駆動フロー・チャート、第３図は本発明の実施例であ
る４分割駆動サーマル・ライン・ヘッドの制御信号構成
説明図、第４図はその駆動タイミング・チャート、第５
図は従来のサーマル・ライン・ヘッドの制御信号の構成
図、第６図はその駆動タイミング・チャート、第７図は
１段階のヘッド通電制御によるヘッドの温度変化説明
図、第８図は２段階のヘッド通電制御によるヘッドの温
度変化説明図である。 ａ……発熱体 ｂ……ヘッド駆動用IC ｃ……発熱体 ｄ〜ｇ……ヘッド駆動用IC ｈ……１回目のヘッド通電用印字データ ｉ……２回目のヘッド通電用印字データ ｊ……１回目のヘッド通電 ｈ……２回目のヘッド通電FIG. 1 is an explanatory diagram of the signal configuration of the thermal line head of the present invention, FIG. 2 is a drive flow chart of the thermal line head of the present invention, and FIG. FIG. 4 is an explanatory diagram of a control signal configuration of a driving thermal line head, FIG. 4 is a driving timing chart thereof, FIG.
FIG. 6 is a diagram showing a configuration of a control signal of a conventional thermal line head, FIG. 6 is a drive timing chart thereof, FIG. FIG. 7 is an explanatory diagram of a temperature change of a head by the head energization control of FIG. a: heating element b: head driving IC c: heating element d to g: head driving IC h: first head energizing print data i ... second head energizing print data j ... … First head energization h …… Second head energization
Claims (2)
ためのラッチ信号を、分割された駆動ブロック毎に独立
して制御できるように分割したサーマル・ライン・ヘッ
ド。1. A thermal line head which performs multi-division driving and divides a latch signal for holding print data so that the latch signal can be independently controlled for each divided drive block.
タ転送を行い、分割されたラッチ信号とヘッド通電信号
を制御することにより、２段階のヘッド通電巾を発生さ
せるヘッド駆動方法。2. A head driving method in which print data is transferred in two stages by using the above-mentioned head, and a divided latch signal and a head conduction signal are controlled to generate a two-stage head conduction width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7068488A JP2668120B2 (en) | 1988-03-24 | 1988-03-24 | Thermal line head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7068488A JP2668120B2 (en) | 1988-03-24 | 1988-03-24 | Thermal line head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01242269A JPH01242269A (en) | 1989-09-27 |
| JP2668120B2 true JP2668120B2 (en) | 1997-10-27 |
Family
ID=13438719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7068488A Expired - Fee Related JP2668120B2 (en) | 1988-03-24 | 1988-03-24 | Thermal line head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2668120B2 (en) |
-
1988
- 1988-03-24 JP JP7068488A patent/JP2668120B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01242269A (en) | 1989-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |