JPH01132734U - - Google Patents
Info
- Publication number
- JPH01132734U JPH01132734U JP2617588U JP2617588U JPH01132734U JP H01132734 U JPH01132734 U JP H01132734U JP 2617588 U JP2617588 U JP 2617588U JP 2617588 U JP2617588 U JP 2617588U JP H01132734 U JPH01132734 U JP H01132734U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- temperature
- print density
- detects
- control device
- 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
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図及び第２図は本考案の実施例におけるサ
ーマルヘツドの印字濃度制御回路図、第３図はそ
の駆動パルス波形図、第４図は従来技術での温度
特性図であり、第５図は本実施例の温度特性図で
ある。第４図、第５図共に、縦軸はＯＤ値（印字
濃度）を示し、横軸は発熱抵抗体の温度を示す。
１，２……温度検出素子、３……パルス発生回
路、４……駆動パルス演算回路、５……発熱抵抗
体、６……駆動制御回路、７，９……周囲温度２
５°Ｃの場合、８，１０……周囲温度０℃の場合
、１１……サーマルヘツド。
1 and 2 are print density control circuit diagrams of a thermal head according to an embodiment of the present invention, FIG. 3 is a drive pulse waveform diagram thereof, FIG. 4 is a temperature characteristic diagram of the conventional technology, and FIG. is a temperature characteristic diagram of this example. In both FIGS. 4 and 5, the vertical axis shows the OD value (print density), and the horizontal axis shows the temperature of the heating resistor. 1, 2...Temperature detection element, 3...Pulse generation circuit, 4...Drive pulse calculation circuit, 5...Heating resistor, 6...Drive control circuit, 7, 9...Ambient temperature 2
If the temperature is 5°C, 8, 10... If the ambient temperature is 0°C, 11... Thermal head.
Claims (1)
サーマルヘツドの温度を検出する温度検出素子と
周囲温度を検出する温度検出素子とを含むパルス
発生回路を該パルス発生回路の出力に応じて前記
サーマルヘツドへ印加する記録通電パルス幅を制
御する制御回路で構成されることを特徴とするサ
ーマルヘツドの印字濃度制御装置。 In the print density control device of the thermal head,
A control circuit that controls a recording current pulse width applied to the thermal head according to the output of the pulse generating circuit, which includes a temperature detecting element that detects the temperature of the thermal head and a temperature detecting element that detects the ambient temperature. A print density control device for a thermal head, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2617588U JPH01132734U (en) | 1988-02-29 | 1988-02-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2617588U JPH01132734U (en) | 1988-02-29 | 1988-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01132734U true JPH01132734U (en) | 1989-09-08 |
Family
ID=31247567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2617588U Pending JPH01132734U (en) | 1988-02-29 | 1988-02-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01132734U (en) |
-
1988
- 1988-02-29 JP JP2617588U patent/JPH01132734U/ja active Pending