JPS587663U - Thermal head print density control circuit - Google Patents
Thermal head print density control circuitInfo
- Publication number
- JPS587663U JPS587663U JP10120881U JP10120881U JPS587663U JP S587663 U JPS587663 U JP S587663U JP 10120881 U JP10120881 U JP 10120881U JP 10120881 U JP10120881 U JP 10120881U JP S587663 U JPS587663 U JP S587663U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- voltage
- control circuit
- print density
- density control
- 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
Landscapes
- Electronic Switches (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例の回路図、第２図は第１図の回路による
温度と出力電圧との関係を示す図、第３″図は本考案の
実施側番示す回路図、第４図は第３図の回路による温臀
と出力電圧との関係を示す図である。
ＲＥＧ・・・・・・電圧安定化回路、ＴＨ・・・・・・
サーミスタ、Ｒ０〜Ｒ３・・・・・・抵抗器、ＲＶ□・
・・・・・可変抵抗器、Ｒ■２・・・、ＣＰ・・・・・
・比較器、ＺＤ・・・・・・定電圧ダイオード、Ｅｏ・
・・・・・出力電圧、ｖｈ・・・・・・端子電圧、Ｖｓ
・・・・・・基準電圧。
÷Ｖｃ−−−−−−−・−一−−−
一−電μ−文回路゛Fig. 1 is a circuit diagram of a conventional example, Fig. 2 is a diagram showing the relationship between temperature and output voltage by the circuit of Fig. 1, Fig. 3'' is a circuit diagram showing the implementation side number of the present invention, and Fig. 4 is a diagram showing the relationship between temperature and output voltage by the circuit of Fig. 1. It is a diagram showing the relationship between warm buttocks and output voltage by the circuit of Fig. 3. REG...Voltage stabilization circuit, TH...
Thermistor, R0~R3...Resistor, RV□・
...Variable resistor, R■2..., CP...
・Comparator, ZD... Constant voltage diode, Eo・
...Output voltage, vh...Terminal voltage, Vs
...Reference voltage. ÷Vc−−−−−−・−1−−− 1−electron μ−state circuit゛
Claims (1)
の端子電圧により圧力電圧が制御されかつ該出力電圧を
前記サーマルヘッドへＩ！茄する電圧安定化回路と、前
記サーミスタを含む回路の端子電圧が基準電圧以上とな
ったとき該端子電圧を制御し前記電圧安定化回路の出力
電圧を前記サーマルヘッドの最大定格電圧以下として制
限する比・較器とを備えたことを特徴とするサーマルヘ
ッドの印字濃度制御回路。The pressure voltage is controlled by the terminal voltage of a circuit including a thermistor for detecting the temperature of the thermal head, and the output voltage is applied to the thermal head. When a terminal voltage of a circuit including a voltage stabilizing circuit and a thermistor becomes equal to or higher than a reference voltage, the terminal voltage is controlled and the output voltage of the voltage stabilizing circuit is limited to a maximum rated voltage of the thermal head or less. A print density control circuit for a thermal head, characterized by comprising a comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10120881U JPS587663U (en) | 1981-07-09 | 1981-07-09 | Thermal head print density control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10120881U JPS587663U (en) | 1981-07-09 | 1981-07-09 | Thermal head print density control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS587663U true JPS587663U (en) | 1983-01-18 |
| JPS6210135Y2 JPS6210135Y2 (en) | 1987-03-09 |
Family
ID=29895876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10120881U Granted JPS587663U (en) | 1981-07-09 | 1981-07-09 | Thermal head print density control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0382564A (en) * | 1989-08-25 | 1991-04-08 | Sharp Corp | Thermal head driver |
-
1981
- 1981-07-09 JP JP10120881U patent/JPS587663U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0382564A (en) * | 1989-08-25 | 1991-04-08 | Sharp Corp | Thermal head driver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6210135Y2 (en) | 1987-03-09 |
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