JPS62244679A - Head driving circuit - Google Patents

Head driving circuit

Info

Publication number
JPS62244679A
JPS62244679A JP8884586A JP8884586A JPS62244679A JP S62244679 A JPS62244679 A JP S62244679A JP 8884586 A JP8884586 A JP 8884586A JP 8884586 A JP8884586 A JP 8884586A JP S62244679 A JPS62244679 A JP S62244679A
Authority
JP
Japan
Prior art keywords
head
temp
current value
temperature
changing
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
Application number
JP8884586A
Other languages
Japanese (ja)
Inventor
Yukinori Sato
佐藤　之則
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP8884586A priority Critical patent/JPS62244679A/en
Publication of JPS62244679A publication Critical patent/JPS62244679A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To stably operate a head regardless of temp., by changing the driving current value of the head corresponding to the temp. detection value of the head. CONSTITUTION:A means 1 for detecting the temp. of a head transmits the temp. of the head to a means 2 changing the driving current value of the head. The means 2 changing the driving current value of the head increases the driving current value when the transmitted temp. is low and reduces the same when high. Therefore, the head is stably operated regardless of the temp.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はヘッドの駆動回路、特にヘッドの温度を検出す
る手段を有するヘッド駆動回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head drive circuit, and particularly to a head drive circuit having means for detecting the temperature of the head.

〔従来の技術〕[Conventional technology]

従来、この櫨のヘッド駆動回路はヘッドの温度を検出し
、ヘッドの温度が規定値以上になると印字デユーティを
低くして、ヘッドを保護していた。Conventionally, this head drive circuit detects the temperature of the head, and when the temperature of the head exceeds a specified value, the print duty is lowered to protect the head.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来のヘッド駆動回路はヘッドが高温となった
時のみ保護するようになっているので、低温時に発生し
易いヘッドの動作不良を防ぐことはできないという欠点
がある。The conventional head drive circuit described above is designed to protect the head only when the temperature reaches a high temperature, so it has the disadvantage that it cannot prevent malfunctions of the head that tend to occur at low temperatures.

〔問題点を解決するための手段〕[Means for solving problems]

本発明のヘッド駆動回路はヘッドの温度を検出する手段
と前記ヘッドの温度の検出値に応じてヘッドの駆動電流
値を変化させる手段を有している。The head drive circuit of the present invention includes means for detecting the temperature of the head and means for changing the value of the drive current for the head in accordance with the detected value of the head temperature.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例図である。ヘッドの温度を検
出する手段１はヘッドの温度をヘッドの駆動電流値を変
化させる手段２に伝える。ヘッドの駆動電流値を変化さ
せる手段２は伝えられた温度が低い場合は駆動電流値を
太きくシ、温度が高い場合は駆動電流値を小さくする。FIG. 1 is a diagram showing an embodiment of the present invention. Means 1 for detecting the temperature of the head transmits the temperature of the head to means 2 for changing the drive current value of the head. The means 2 for changing the drive current value of the head increases the drive current value when the transmitted temperature is low, and decreases the drive current value when the temperature is high.

従って温度に関係なくヘッドが安定に動作する。Therefore, the head operates stably regardless of temperature.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、ヘッドの温度に応じてヘ
ッドの駆動電流値を変化させるようにしたことにより、
温度に関係なくヘッドを安定に動作させられる効果があ
る。As explained above, the present invention changes the drive current value of the head according to the temperature of the head.
This has the effect of allowing the head to operate stably regardless of temperature.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例図である。 １・・・・・・ヘッドの温度を検出する手段、２・・・
・・・ヘッドの駆動電流値を変化させる手段。 、１−き、 第１図FIG. 1 is a diagram showing an embodiment of the present invention. 1...Means for detecting the temperature of the head, 2...
...Means for changing the drive current value of the head. , 1-ki, Figure 1

Claims (1)

【特許請求の範囲】[Claims] ヘッドの温度を検出する手段と、前記ヘッドの温度の検
出値に応じてヘッドの駆動電流値を変化させる手段とを
有することを特徴とするヘッド駆動回路。A head drive circuit comprising: means for detecting the temperature of the head; and means for changing a head drive current value in accordance with the detected value of the head temperature.
JP8884586A 1986-04-16 1986-04-16 Head driving circuit Pending JPS62244679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8884586A JPS62244679A (en) 1986-04-16 1986-04-16 Head driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8884586A JPS62244679A (en) 1986-04-16 1986-04-16 Head driving circuit

Publications (1)

Publication Number Publication Date
JPS62244679A true JPS62244679A (en) 1987-10-26

Family

ID=13954307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8884586A Pending JPS62244679A (en) 1986-04-16 1986-04-16 Head driving circuit

Country Status (1)

Country Link
JP (1) JPS62244679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166699A (en) * 1990-04-11 1992-11-24 Canon Kabushiki Kaisha Recording apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166699A (en) * 1990-04-11 1992-11-24 Canon Kabushiki Kaisha Recording apparatus
US5367325A (en) * 1990-04-11 1994-11-22 Canon Kabushiki Kaisha Recording apparatus with temperature detection and compensation

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