JPH0211347A - Driving control system for thermal head - Google Patents
Driving control system for thermal headInfo
- Publication number
- JPH0211347A JPH0211347A JP16361488A JP16361488A JPH0211347A JP H0211347 A JPH0211347 A JP H0211347A JP 16361488 A JP16361488 A JP 16361488A JP 16361488 A JP16361488 A JP 16361488A JP H0211347 A JPH0211347 A JP H0211347A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- heating element
- heater
- temperature
- predetermined
- 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 abstract description 24
- 238000000034 method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/38—Preheating, i.e. heating to a temperature insufficient to cause printing
Abstract
Description
【発明の詳細な説明】
〔概 要〕
本発明はサーマルヘッドに関し、
記録媒体の低温域マージンを補足して記録速度を向上せ
しめることを目的とし、
サーマルヘッドの発熱素子の駆動休止期間における温度
を上昇せしめるヒータと、該発熱素子の温度を検出する
センサと、該センサによる検出温度に基づき該ヒータの
電源投入切断を制御する温度制御部とを設け、サーマル
ヘッドに設けた該ヒータにより該発熱素子温度を所定温
度以上に保持して駆動するように構成する。[Detailed Description of the Invention] [Summary] The present invention relates to a thermal head, and aims to increase the recording speed by supplementing the low-temperature margin of the recording medium, and to reduce the temperature during the drive stop period of the heating element of the thermal head. A heater provided in the thermal head is provided with a heater for increasing the temperature of the heating element, a sensor for detecting the temperature of the heating element, and a temperature control section for controlling power on/off of the heater based on the temperature detected by the sensor. The device is configured to be driven while maintaining the temperature at a predetermined temperature or higher.
本発明は、プリンタ、ファクシミリ装置等の記録デバイ
スとして使用されているサーマルヘッドの駆動制御方式
に関する。The present invention relates to a drive control method for a thermal head used as a recording device in a printer, facsimile machine, etc.
〔従来の技術及び発明が解決しようとする課題〕複数の
発熱素子を備え、記録媒体（感熱記録祇熱転写フィルム
）に所定の熱量を与えて印字するサーマルへラドは、発
熱素子の駆動休止期間（印字開始前および駆動パルス間
）における温度により発熱温度が大きく変わるため、印
字ドツトごとに記録媒体に与える熱量を一定とする電力
側′４Ｂ（パワー制′４Ｂ）が行われている。[Prior Art and Problems to be Solved by the Invention] Thermal Herad, which is equipped with a plurality of heating elements and prints by applying a predetermined amount of heat to a recording medium (thermal recording transfer film), Since the heat generation temperature varies greatly depending on the temperature (before the start of printing and between drive pulses), the power side '4B' (power control '4B) is used in which the amount of heat given to the recording medium is constant for each printed dot.
このパワー制御の方法として、発熱素子の発生する熱量
がＶ２／Ｒ−ｔ（但し、■は印加電圧、Ｒは素子抵抗、
ｔは駆動パルス幅）で与えられるため、駆動パルス幅を
制御する方法が一般的に行われているが、１ラインを記
録するに要する時間（ライン周期）Ｔに対し、Ｔ＞ｎｔ
（但し、ｎは１ライン当たりの駆動パルス数）が成立す
ることが絶対条件であり、駆動パルス幅を大きくとるこ
とに限界がある。As a method of power control, the amount of heat generated by the heating element is V2/R-t (where ■ is the applied voltage, R is the element resistance,
Since t is given by the driving pulse width), a method of controlling the driving pulse width is generally used, but for the time T required to record one line (line period), T>nt
(However, it is an absolute condition that n is the number of drive pulses per line), and there is a limit to how large the drive pulse width can be.
この限界は通常記録媒体のマージンでカバーされている
が、ファクシミリ装置のごとく多数の発熱素子で構成さ
れたサーマルヘッドでは蓄熱温度が高くなり、このため
高温対策された記録媒体を使用しようとすると、当然の
ごとなから低温域でのマージンは無くなり、従って印字
開始時等における低温時の印字品質が悪くなる。This limit is usually covered by the margin of the recording medium, but the heat storage temperature is high in a thermal head composed of many heating elements like in a facsimile machine, so if you try to use a recording medium with high temperature measures, As a matter of course, there is no margin in the low temperature range, and therefore the print quality at low temperatures, such as at the start of printing, deteriorates.
従って、駆動パルス幅、即ちライン周期を大きくとらね
ばならず、印字速度が低下するという課題が生じる。Therefore, the driving pulse width, that is, the line period must be increased, resulting in a problem that the printing speed decreases.
本発明は上記課題に鑑み、低温域における性能低下を改
善するサーマルヘッドの駆動制御方式を提供することを
目的とする。In view of the above problems, it is an object of the present invention to provide a drive control method for a thermal head that improves performance deterioration in a low temperature range.
上記目的を達成するため、本発明のサーマルヘッドの駆
動制御方式は、第１図本発明の原理図に示すように、
サーマルヘッドの発熱素子（３）の駆動休止期間におけ
る温度を上昇せしめるヒータ（１）と、該発熱素子の温
度を検出するセンサ（２）と、酸センサ（２）による検
出温度に基づき該ヒータ（１）の電源投入切断を制御す
る温度制御部（１０）とを設ける。In order to achieve the above object, the thermal head drive control system of the present invention, as shown in FIG. 1, which is a diagram of the principle of the present invention, uses a heater ( 1), a sensor (2) that detects the temperature of the heating element, and a temperature control section (10) that controls power on/off of the heater (1) based on the temperature detected by the acid sensor (2).
サーマルヘッド内にヒータ１と発熱素子３の温度を検出
するセンサ２とを設け、駆動休止期間（印字開始前およ
び駆動パルス間）中の温度が所定温度以下のとき、温度
制御部１０はヒータ１に通電し、発熱素子３を所定温度
以上に保持するように制御する。A sensor 2 that detects the temperature of the heater 1 and the heat generating element 3 is provided in the thermal head, and when the temperature during the drive pause period (before the start of printing and between drive pulses) is below a predetermined temperature, the temperature control unit 10 controls the temperature of the heater 1. is energized to control the heating element 3 to be maintained at a predetermined temperature or higher.
これにより、特に高温対策された記録媒体を使用した場
合、印字開始時等における低温域のマージン低下を補償
することができ、印字速度等の性能低下を防止すること
ができる。As a result, especially when a recording medium that is protected against high temperatures is used, it is possible to compensate for a decrease in the margin in the low temperature range at the time of starting printing, etc., and it is possible to prevent a decrease in performance such as printing speed.
本発明の実施例を第１図〜第３図を用いて詳細に説明す
る。Embodiments of the present invention will be described in detail using FIGS. 1 to 3.
本実施例はファクシミリ装置に使用されるサーマルヘッ
ドを例として説明する。This embodiment will be explained using a thermal head used in a facsimile machine as an example.
第１図は本発明の原理図、第２図は実施例のサーマルヘ
ッド構造図、第３図はサーマルヘッドの装機状態を示す
図である。FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a structural diagram of a thermal head according to an embodiment, and FIG. 3 is a diagram showing a state in which the thermal head is installed.
第２図に示すように、ファクシミリ装置に使用されるサ
ーマルヘッドでは、それぞれの発熱素子３がプリント板
５上に配列されており、アルミ等の絶縁物を使用したヒ
ートシンク４によって、発熱素子３に蓄積される蓄熱温
度を下げるように構成されている。As shown in FIG. 2, in a thermal head used in a facsimile machine, each heating element 3 is arranged on a printed circuit board 5, and a heat sink 4 made of an insulating material such as aluminum connects the heating element 3. It is configured to lower the temperature of the accumulated heat.
このヒートシンク４にヒータ１を埋め込み、ヒータに通
電してヒートシンク４を昇温すると、発熱素子３を昇温
させることができる。When the heater 1 is embedded in the heat sink 4 and the heater is energized to raise the temperature of the heat sink 4, the temperature of the heating element 3 can be raised.
また、センサ２は発熱素子３を印刷したプリント板５上
、例えば発熱素子３のリード線上に設けられ、パワー制
御における温度検出と共用される。Further, the sensor 2 is provided on a printed board 5 on which a heating element 3 is printed, for example, on a lead wire of the heating element 3, and is also used for temperature detection in power control.
このセンサ２の出力を検出し、所定温度以下のとき、温
度制御部１０（第１図）はヒータ１に電源１１を投入し
、所定温度以上のとき切断する。The output of this sensor 2 is detected, and when the temperature is below a predetermined temperature, the temperature control section 10 (FIG. 1) turns on the power supply 11 to the heater 1, and when the temperature is above the predetermined temperature, it is turned off.
以上により、装置電源を投入すると印字開始前に、ヒー
タ１により発熱素子３は所定温度以上になり、低温域に
マージンのない高温対策された記録媒体を使用しても、
所定のライン周期内でパルス幅が制御されて正常に印字
できる。As described above, when the device is powered on, the heating element 3 is heated to a predetermined temperature or higher by the heater 1 before printing starts, and even if a recording medium with high temperature measures with no margin in the low temperature range is used,
The pulse width is controlled within a predetermined line period, allowing normal printing.
なお、上記方式により低温域において従来よりパルス幅
を狭くできるため、ライン周＊ｙｔ ＜印字速度）を上
昇せしめることが可能となり、例えばファクシミリＧ４
機の受信速度に容易に対応させることが可能となる。Note that the above method allows the pulse width to be narrower than before in the low temperature range, making it possible to increase the line circumference*yt<printing speed.For example, facsimile G4
This makes it possible to easily match the reception speed of the device.
なお、第３図はファクシミリ装置内におけるサーマルヘ
ッド１５の装機状態を示したものであり、感熱記録紙１
２がサーマルヘッド１５とプラテン１４との間に送られ
て印字された後、カッタ１３で切断される構成を示した
ものである。Note that FIG. 3 shows the installation state of the thermal head 15 in the facsimile machine, and the thermal head 15 is installed in the facsimile machine.
2 is sent between a thermal head 15 and a platen 14 to be printed, and then cut by a cutter 13.
第１図は本発明の原理図、
第２図は実施例のサーマルヘッド構造図、第３図はサー
マルヘッドの装機状態を示す図、である。図中、
１はヒータ、２はセンサ、３は発熱素子、４はヒートシ
ンク、１０は温度制御部である。
〔発明の効果〕
本発明は、サーマルヘッドにヒータを設けて発熱素子を
所定温度以上に保持し駆動するサーマルヘッドの駆動制
御方式を提供するもので、低温域のマージン低下を補償
し駆動パルス幅を狭く設定できるため、印字速度を上昇
せしめる効果は多大なものがある。
ＴＱ脅・Ｖフーフルヘッｒ′−μ立面
第２図
７−ン）し入ツ）′／）東」鰻抜り、？示す図第５図FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a structural diagram of a thermal head according to an embodiment, and FIG. 3 is a diagram showing a state in which the thermal head is installed. In the figure, 1 is a heater, 2 is a sensor, 3 is a heating element, 4 is a heat sink, and 10 is a temperature control section. [Effects of the Invention] The present invention provides a drive control method for a thermal head in which a heater is provided in the thermal head to maintain and drive the heat generating element at a predetermined temperature or higher, and compensates for margin reduction in the low temperature range and increases the drive pulse width. can be set narrowly, which has a great effect on increasing the printing speed. TQ Threat/V Fuful Head r'-μ Elevation Figure 2 7-n)shiiritsu)'/)Higashi" Unaguri, ? Figure 5
Claims (1)
うサーマルヘッドの駆動制御方式であって、 該発熱素子（３）の駆動休止期間における温度を上昇せ
しめるヒータ（１）と、 該発熱素子（３）の温度を検出するセンサ（２）と、 該センサ（２）による検出温度に基づき該ヒータ（１）
の電源投入切断を制御する温度制御部（１０）とを設け
、 サーマルヘッドに設けた該ヒータ（１）により該発熱素
子温度を所定温度以上に保持して駆動することを特徴と
するサーマルヘッドの駆動制御方式。[Claims] A drive control system for a thermal head that performs thermal recording or thermal transfer recording and is equipped with a heating element (3), comprising: a heater (1) that increases the temperature of the heating element (3) during a period when the heating element (3) is not driven; a sensor (2) that detects the temperature of the heating element (3); and a sensor (2) that detects the temperature of the heater (1) based on the temperature detected by the sensor (2).
and a temperature control section (10) for controlling power on/off of the thermal head, and is driven by maintaining the temperature of the heating element at a predetermined temperature or higher by the heater (1) provided in the thermal head. Drive control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16361488A JPH0211347A (en) | 1988-06-30 | 1988-06-30 | Driving control system for thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16361488A JPH0211347A (en) | 1988-06-30 | 1988-06-30 | Driving control system for thermal head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0211347A true JPH0211347A (en) | 1990-01-16 |
Family
ID=15777273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16361488A Pending JPH0211347A (en) | 1988-06-30 | 1988-06-30 | Driving control system for thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0211347A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05220990A (en) * | 1991-11-19 | 1993-08-31 | Fuji Photo Film Co Ltd | Multicolor thermal recording apparatus |
| EP1752294A3 (en) * | 2005-08-09 | 2009-10-21 | Funai Electric Co., Ltd. | Printer |
-
1988
- 1988-06-30 JP JP16361488A patent/JPH0211347A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05220990A (en) * | 1991-11-19 | 1993-08-31 | Fuji Photo Film Co Ltd | Multicolor thermal recording apparatus |
| EP1752294A3 (en) * | 2005-08-09 | 2009-10-21 | Funai Electric Co., Ltd. | Printer |
| US7898560B2 (en) | 2005-08-09 | 2011-03-01 | Funai Electric Co., Ltd. | Printer |
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