JPH0372448U - - Google Patents
Info
- Publication number
- JPH0372448U JPH0372448U JP13498689U JP13498689U JPH0372448U JP H0372448 U JPH0372448 U JP H0372448U JP 13498689 U JP13498689 U JP 13498689U JP 13498689 U JP13498689 U JP 13498689U JP H0372448 U JPH0372448 U JP H0372448U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- cpu
- output voltage
- thermal
- converter
- 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
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
Description
第１図はこの考案の一実施例を示すサーマルプ
リンタの駆動制御回路のブロツク図、第２図は第
１図の実施例におけるＣＰＵ１０によるこの考案
に係わる動作を示すフロー図、第３図は従来のサ
ーマルプリンタの駆動制御回路の一例を示すブロ
ツク図である。
１……バツテリ、２……サーマルヘツド、２１
〜２ｎ……発熱素子、４……ＤＣ／ＤＣコンバー
タ、６……ドライバ、１０……ＣＰＵ（中央処理
装置）、１１……メモリ（ＲＡＭ，ＲＯＭ）、１
２……Ａ／Ｄコンバータ、１３，１４……電圧分
割用抵抗。
Fig. 1 is a block diagram of a drive control circuit for a thermal printer showing an embodiment of this invention, Fig. 2 is a flow diagram showing the operation of the CPU 10 in the embodiment of Fig. 1, and Fig. 3 is a conventional one. FIG. 2 is a block diagram showing an example of a drive control circuit for a thermal printer according to the present invention. 1...Battery, 2...Thermal head, 2 1
~2n...heating element, 4...DC/DC converter, 6...driver, 10...CPU (central processing unit), 11...memory (RAM, ROM), 1
2... A/D converter, 13, 14... Voltage division resistor.
Claims (1)
熱紙に又は熱転写リボンを介して普通紙に文字又
はコード等の情報を印刷するサーマルプリンタに
おいて、 前記バツテリの出力電圧Ｖ１を前記サーマルヘ
ツドのドライブ電圧として印加すると共に、この
電圧Ｖ１をＤＣ／ＤＣコンバータで安定化した電
圧Ｖ２；Ｖ２＜Ｖ１を、少なくともＣＰＵ、メモ
リ、及びＡ／Ｄコンバータからなる制御系の電源
電圧として供給するようにし、 前記バツテリの出力電圧Ｖ１を抵抗分割して、
その分割点の電圧Ｖ３；Ｖ３＜Ｖ２を前記Ａ／Ｄ
コンバータによつてデジタル値に変換した値を前
記ＣＰＵに送り、該ＣＰＵが逆算によつて前記出
力電圧Ｖ１を求めるようにすると共に、 前記サーマルヘツドには、発熱素子の抵抗値の
平均値Ｒａｖを示すデシタル値を前記ＣＰＵに出
力する手段を備え、 前記メモリには、前記サーマルヘツドの発熱素
子に加えるエネルギを一定にするために、前記抵
抗値の平均値Ｒａｖと前記出力電圧Ｖ１と通電時
間ｔとの関係を示すテーブル又は演算式を格納し
ており、 前記ＣＰＵは、求めた出力電圧Ｖ１と抵抗値の
平均値Ｒａｖの情報から前記発熱素子への通電時
間ｔを決定するようにしたことを特徴するサーマ
ルプリンタ。[Claims for Utility Model Registration] In a thermal printer that uses a battery as a power source to print information such as characters or codes directly on thermal paper with a thermal head or on plain paper via a thermal transfer ribbon, the output voltage V1 of the battery is In addition to being applied as a drive voltage for the thermal head, this voltage V 1 is stabilized by a DC/DC converter to obtain a voltage V 2 ; V 2 <V 1 as a power supply for a control system consisting of at least a CPU, memory, and A/D converter. The output voltage V1 of the battery is divided by resistance, and the voltage is supplied as a voltage.
The voltage at the dividing point V 3 ; V 3 <V 2 is the voltage at the A/D
The value converted into a digital value by the converter is sent to the CPU, and the CPU calculates the output voltage V1 by back calculation. means for outputting a digital value indicating to the CPU, the memory is energized with the average value Rav of the resistance values and the output voltage V1 in order to keep the energy applied to the heating element of the thermal head constant. A table or an arithmetic expression indicating a relationship with time t is stored, and the CPU determines the energization time t to the heat generating element from information on the obtained output voltage V1 and the average value Rav of the resistance values. A thermal printer characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13498689U JPH0745329Y2 (en) | 1989-11-21 | 1989-11-21 | Thermal printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13498689U JPH0745329Y2 (en) | 1989-11-21 | 1989-11-21 | Thermal printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0372448U true JPH0372448U (en) | 1991-07-22 |
| JPH0745329Y2 JPH0745329Y2 (en) | 1995-10-18 |
Family
ID=31682280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13498689U Expired - Lifetime JPH0745329Y2 (en) | 1989-11-21 | 1989-11-21 | Thermal printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745329Y2 (en) |
-
1989
- 1989-11-21 JP JP13498689U patent/JPH0745329Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745329Y2 (en) | 1995-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |