JPH0388745U - - Google Patents
Info
- Publication number
- JPH0388745U JPH0388745U JP15033789U JP15033789U JPH0388745U JP H0388745 U JPH0388745 U JP H0388745U JP 15033789 U JP15033789 U JP 15033789U JP 15033789 U JP15033789 U JP 15033789U JP H0388745 U JPH0388745 U JP H0388745U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- reference voltage
- integrating circuit
- integrated waveform
- print density
- 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
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Electronic Switches (AREA)
- Fax Reproducing Arrangements (AREA)
Description
図は本考案の一実施例を示し、第１図はサーマ
ルヘツドの駆動回路図、第２図は印字濃度制御回
路のタイミングチヤートである。
２…サーマルヘツド、８…印字濃度制御回路、
１２…発熱体、１４…駆動電源、１８…積分回路
、１９…比較器、Ａ…ヒート信号、Ｂ…積分波形
、Ｃ…基準電圧、Ｄ…比較電圧。
The drawings show an embodiment of the present invention, in which Fig. 1 is a driving circuit diagram of a thermal head, and Fig. 2 is a timing chart of a print density control circuit. 2...Thermal head, 8...Print density control circuit,
12... Heating element, 14... Drive power source, 18... Integrating circuit, 19... Comparator, A... Heat signal, B... Integral waveform, C... Reference voltage, D... Comparison voltage.
Claims (1)
基準電圧とし、前記積分回路にてヒート信号を積
分波形に変換し、前記基準電圧と積分波形との比
較出力によりサーマルヘツドの発熱体のオン／オ
フを制御するサーマルヘツドの印字濃度制御回路
。 Consisting of an integrating circuit and a comparator, the driving power supply voltage is used as a reference voltage, the heat signal is converted into an integrated waveform in the integrating circuit, and the heating element of the thermal head is turned on/off by the comparison output between the reference voltage and the integrated waveform. Print density control circuit for thermal head that controls off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15033789U JPH0388745U (en) | 1989-12-27 | 1989-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15033789U JPH0388745U (en) | 1989-12-27 | 1989-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0388745U true JPH0388745U (en) | 1991-09-10 |
Family
ID=31696688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15033789U Pending JPH0388745U (en) | 1989-12-27 | 1989-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0388745U (en) |
-
1989
- 1989-12-27 JP JP15033789U patent/JPH0388745U/ja active Pending
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