JPH0236442U - - Google Patents
Info
- Publication number
- JPH0236442U JPH0236442U JP11334688U JP11334688U JPH0236442U JP H0236442 U JPH0236442 U JP H0236442U JP 11334688 U JP11334688 U JP 11334688U JP 11334688 U JP11334688 U JP 11334688U JP H0236442 U JPH0236442 U JP H0236442U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- temperature
- circuit
- thermal
- voltage
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図は本案による感熱プリンタの回路構成例
を示すブロツク図、第２図は、感熱プリンタのヘ
ツド駆動回路部分の一構成例を示す回路図、第３
図、第４図は感熱ヘツドの構造図、第５図は実施
例を説明するためのタイミング図、第６図は感熱
ヘツドの発熱状態図である。
１…ＣＰＵ（制御回路）、５…プリンタ制御回
路、６…定電圧発生回路（温度検出回路）、７…
電圧切換回路、９…感熱ヘツド駆動回路、１１…
感熱ヘツド、１３…サーミスタ（温度検出回路）
。
FIG. 1 is a block diagram showing an example of a circuit configuration of a thermal printer according to the present invention, FIG. 2 is a circuit diagram showing an example of a configuration of a head drive circuit portion of a thermal printer, and FIG.
4 is a structural diagram of the thermal head, FIG. 5 is a timing diagram for explaining the embodiment, and FIG. 6 is a diagram of the heat generation state of the thermal head. 1... CPU (control circuit), 5... printer control circuit, 6... constant voltage generation circuit (temperature detection circuit), 7...
Voltage switching circuit, 9... Thermal head drive circuit, 11...
Thermal head, 13...Thermistor (temperature detection circuit)
.
Claims (1)
熱ヘツドと前記感熱ヘツドの温度を検出する温度
検出回路と発熱抵抗体に通電させ温度を上昇させ
るための定電圧回路、前記感熱ヘツドで印字する
ときに印加する電圧と前記定電圧回路の出力電圧
を切換える電圧切換回路からなる感熱プリンタに
おいて、前記感熱ヘツドの発熱抵抗体に１つまた
は複数の電圧パルスを加えて、感熱ヘツドの温度
を上昇させる制御回路を具備したことを特徴とす
る感熱プリンタ。 ２ 請求の範囲第１項において、感熱ヘツドの温
度上昇前後の温度差を測定するようにしたことを
特徴とする感熱プリンタ。 ３ 請求の範囲第１項または第２項において、感
熱ヘツドの温度測定動作を電源時は印刷開始時に
行なうことを特徴とする感熱プリンタ。[Claims for Utility Model Registration] 1. A thermal head that prints by selectively generating heat from a heating resistor, a temperature detection circuit that detects the temperature of the thermal head, and a constant voltage for increasing the temperature by energizing the heating resistor. In a thermal printer comprising a circuit, a voltage switching circuit that switches between the voltage applied when printing with the thermal head and the output voltage of the constant voltage circuit, one or more voltage pulses are applied to the heating resistor of the thermal head. A thermal printer characterized by comprising a control circuit for increasing the temperature of a thermal head. 2. The thermal printer according to claim 1, characterized in that the temperature difference before and after the temperature of the thermal head is increased is measured. 3. A thermal printer according to claim 1 or 2, characterized in that the temperature measuring operation of the thermal head is performed at the start of printing when the power is on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11334688U JPH0236442U (en) | 1988-08-31 | 1988-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11334688U JPH0236442U (en) | 1988-08-31 | 1988-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0236442U true JPH0236442U (en) | 1990-03-09 |
Family
ID=31353100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11334688U Pending JPH0236442U (en) | 1988-08-31 | 1988-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236442U (en) |
-
1988
- 1988-08-31 JP JP11334688U patent/JPH0236442U/ja active Pending
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