JPS63252760A - Thermal resistor trimming of thermal head - Google Patents
Thermal resistor trimming of thermal headInfo
- Publication number
- JPS63252760A JPS63252760A JP8732087A JP8732087A JPS63252760A JP S63252760 A JPS63252760 A JP S63252760A JP 8732087 A JP8732087 A JP 8732087A JP 8732087 A JP8732087 A JP 8732087A JP S63252760 A JPS63252760 A JP S63252760A
- Authority
- JP
- Japan
- Prior art keywords
- resistance value
- pulse
- predetermined
- heating resistor
- 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
- 238000009966 trimming Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 20
- 238000007639 printing Methods 0.000 abstract description 8
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 5
- 239000000523 sample Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 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
- B41J2/32—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 using thermal heads
- B41J2/35—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 using thermal heads providing current or voltage to the thermal head
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、熱転写式プリンタや、ファクシミリに使用さ
れるサーマルヘッドの発熱抵抗体トリミング方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for trimming a heating resistor of a thermal head used in a thermal transfer printer or facsimile.
従来の技術
従来、熱転写式プリンタや、ファクシミリに使用される
サーマルヘッドの構造は第４図（ａ）（ｂ）に示すよう
に、絶縁基板１の上に金、銀、銅等の電気良導体材料を
用いて、成膜技術により構成された共通電極２と、個別
電極３が形成され、その上に抵抗体層４と耐摩耗層５が
構成される。その結果、共通電極２と個別電極３に挾ま
れた複数個の発熱抵抗体６が形成される。BACKGROUND OF THE INVENTION Conventionally, the structure of a thermal head used in a thermal transfer printer or a facsimile machine is as shown in FIGS. A common electrode 2 and individual electrodes 3 are formed using a film forming technique, and a resistor layer 4 and a wear-resistant layer 5 are formed thereon. As a result, a plurality of heating resistors 6 sandwiched between the common electrode 2 and the individual electrodes 3 are formed.
このようなサーマルヘッドの発熱抵抗体は、酸化ルテニ
ウム等の粉末をペースト状にして、スクリーン印刷技術
等を用いて、塗布した後、焼成することにより、形成す
るのが、一般的であり、製造コストや信頼性の点からも
、このような方法が主流となりつつある。The heating resistor of such a thermal head is generally formed by making a paste of powder such as ruthenium oxide, applying it using screen printing technology, etc., and then baking it. This method is becoming mainstream in terms of cost and reliability.
しかしながら、印刷によって発熱抵抗体を形成すること
は、発熱抵抗体を構成している酸化ルテニウム等の粉末
の不均一性や、印刷機械の精度の限界から、形成された
複数個の発熱抵抗体群々の物性や形状が不拘−吉なり、
これらが、発熱抵抗体の抵抗値にバラツキが生じる原因
となって、ヘッド全体の発熱抵抗体の抵抗値のバラツキ
は、平均抵抗値の±２０％以」二あるのが現状である。However, forming a heating resistor by printing is difficult due to the non-uniformity of the powder such as ruthenium oxide that makes up the heating resistor and the limitations of the precision of printing machines. The physical properties and shapes of each are unrestricted,
These factors cause variations in the resistance value of the heat generating resistor, and currently the variation in the resistance value of the heat generating resistor throughout the head is ±20% or more of the average resistance value.
そこで、印刷によって生じた発熱抵抗体の抵抗値のバラ
ツキを補正する方法（トリミング方法）が種々考えられ
ている。例えばレーザー加工等により、抵抗体の形状を
変化させて抵抗値を補正する方法や、特開昭６１−８３
０５０号公報に記載されているように発熱抵抗体に通常
の使用時より過負荷の電圧パルスを印加して抵抗値を変
化させる方法がある。Therefore, various methods (trimming methods) have been considered for correcting variations in the resistance value of the heating resistor caused by printing. For example, there is a method of correcting the resistance value by changing the shape of the resistor by laser processing, etc.
As described in Japanese Patent No. 050, there is a method of changing the resistance value by applying an overload voltage pulse to the heating resistor during normal use.
発明が解決しようとする問題点
しかし、このような従来のトリミング方法では、前者は
発熱抵抗体の形状が変わるために印字性能に悪影響を及
ぼすため、サーマルヘッドの発熱抵抗体のトリミング方
法としては好ましくない。後者の方法は、その点では優
れているが、発熱抵抗体に印加するパルス電圧を最初は
比較的低く設定し、パルス印加後の、抵抗値をチｒ−ツ
クしながら、徐々にパルス電圧を」１昇さぜる方法を採
っている。そのため、１回のパルス印加で所定の抵抗値
に達しない場合には、２回目はより電圧の高いパルス印
加を行うため、抵抗値の変化量も大きくトリミングの精
度が悪くなるのみならす、１回目のパルス印加と２回目
のパルス印加の間に、パルス電圧を変化させるという複
雑な作業が必要である。それ故、サーマルヘッドのよう
に数百〜数千もの発熱抵抗体のトリミングを行・う場合
には非常に長時間を要し、そのため、製造コストが上が
り、印刷によるコストメリットが薄れてしまうという欠
点を有していた。Problems to be Solved by the Invention However, in the conventional trimming method, the shape of the heating resistor changes, which adversely affects printing performance. do not have. The latter method is superior in this respect, but the pulse voltage applied to the heating resistor is initially set relatively low, and after the pulse is applied, the pulse voltage is gradually increased while changing the resistance value. ” 1 increase method is adopted. Therefore, if the predetermined resistance value is not reached with one pulse application, a higher voltage pulse is applied the second time, so the amount of change in resistance value is large, and the precision of trimming is degraded. A complicated operation is required to change the pulse voltage between the first pulse application and the second pulse application. Therefore, it takes a very long time to trim hundreds to thousands of heat-generating resistors such as in a thermal head, which increases manufacturing costs and reduces the cost benefits of printing. It had drawbacks.
そこで、本発明は印字性能や発熱抵抗体に悪影響を及ぼ
すことなく、しかも、短時間で精度よ（発熱抵抗体の抵
抗値を所定値に補正できるサーマルヘッドの発熱抵抗体
トリミング方法を提供するものである。Therefore, the present invention provides a heating resistor trimming method for a thermal head that can correct the resistance value of the heating resistor to a predetermined value with accuracy in a short time without adversely affecting the printing performance or the heating resistor. It is.
問題点を解決するための手段
本発明は、サーマルヘッドの発熱抵抗体に、パルス幅（
ｔ）、パルス周期（Ｔ）の電圧パルスを所定数印加した
場合の、パルス電圧（Ｖ）と抵抗値変化割合（Ｄｒｉｆ
ｔ）の関係を求め、数式化する第１の手段と、トリミン
グを行う発熱抵抗体群の初期抵抗値（Ｒｏ）を測定し、
この測定値に基づき各発熱抵抗体の抵抗値を所定の抵抗
値にトリミングするだめの必要抵抗値変化割合（トリミ
ング量）を求める第２の手段と、上記発熱抵抗体の抵抗
値変化特性を示す数式を用いて、印加ずへきパルス電圧
を決定し、これに基づいて発熱抵抗体にパルス幅（ｔ
’） 、パルス周期（Ｔ）の電圧パルスを所定数印加し
た後、発熱抵抗体の抵抗値を測定し、所定の抵抗値に達
するまで電圧パルスを所定数印加することを繰り返す第
３の手段とにより、発熱抵抗体の抵抗値を所定値に補正
するものである。Means for Solving the Problems The present invention provides a heating resistor of a thermal head with a pulse width (
t), pulse voltage (V) and resistance value change rate (Drif
A first means of determining and formulating the relationship of t), and measuring the initial resistance value (Ro) of the heating resistor group to be trimmed,
A second means for determining the necessary resistance change rate (trimming amount) for trimming the resistance value of each heating resistor to a predetermined resistance value based on this measured value, and a resistance value change characteristic of the heating resistor. Using a mathematical formula, determine the pulse voltage to be applied, and based on this determine the pulse width (t
'), after applying a predetermined number of voltage pulses with a pulse period (T), measuring the resistance value of the heating resistor, and repeating the application of a predetermined number of voltage pulses until the predetermined resistance value is reached; Accordingly, the resistance value of the heating resistor is corrected to a predetermined value.
作用
上記した方法により、発熱抵抗体の抵抗値変化特性に応
じてトリミングのためのパルス電圧を決定し、パルス印
加数を変化させて抵抗値の微調整を行えるため、短時間
で精度よく、しかも、印字性能や発熱抵抗体の寿命に悪
影響を及ぼすことなく、サーマルヘッドの発熱抵抗体の
抵抗値を所定値に補正できるものである。Function: The method described above determines the pulse voltage for trimming according to the resistance value change characteristics of the heating resistor, and finely adjusts the resistance value by changing the number of applied pulses. , the resistance value of the heating resistor of the thermal head can be corrected to a predetermined value without adversely affecting the printing performance or the life of the heating resistor.
実施例
以下、本発明の一実施例を添付図面に基づいて説明する
。なお、従来例を示す第４図と共通の素子には共通の番
号を付している。EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. Incidentally, elements common to those in FIG. 4 showing the conventional example are given common numbers.
第１図は本発明のサーマルヘッドの発熱抵抗体トリミン
グ方法を用いた装置の構成図であり、絶縁基板１上に形
成された複数の発熱抵抗体６は、共通電極２と、個別電
極３に接触させたプローブ装置７および切換スイッチ装
置８を介して、抵抗測定器９およびパルス電圧発生装置
１０に接続されている。また、上記切換スイッチ装置８
、抵抗測定器９およびパルス電圧発生装置１０はインタ
ーフェース１１によって、コンピュータ１２に接続され
ており、このコンピュータ１２によって、抵抗値の測定
、パルス条件の設定、パルス電圧の印加、停止等、サー
マルヘッドの発熱抵抗体のトリミングに必要な演算およ
び制御を全て行うことができる構成になっている。FIG. 1 is a configuration diagram of an apparatus using the heating resistor trimming method of a thermal head according to the present invention, in which a plurality of heating resistors 6 formed on an insulating substrate 1 are connected to a common electrode 2 and individual electrodes 3. It is connected to a resistance measuring device 9 and a pulse voltage generator 10 via a probe device 7 and a changeover switch device 8 that are in contact with each other. In addition, the changeover switch device 8
, the resistance measuring device 9 and the pulse voltage generator 10 are connected to a computer 12 via an interface 11, and the computer 12 controls the thermal head, such as measuring resistance, setting pulse conditions, applying and stopping pulse voltage, etc. The structure is such that all calculations and controls necessary for trimming the heating resistor can be performed.
第２図は同一仕様ではあるが初期抵抗値の異なる複数の
発熱抵抗体に対してパルス幅（ｔ ＝ ３０μ５ｅｃ）
、パルス周期（Ｔ＝８ｍｓｅｃ）の電圧パルスを１２０
パルス印加した場合の、各発熱抵抗体のパルス電圧（Ｖ
）と抵抗値変化割合（Ｄｒｉｆｔ−（Ｒ−Ｒｏ）／Ｒｏ
＊１００％）の関係を示した一例である。この図より、
発熱抵抗体の抵抗値変化特性は、初期抵抗値（Ｒｏ）の
大小に関わらず、パルス電圧の増大と共に発熱抵抗体の
抵抗値は徐）７に低下する傾向を示すことが判る。Figure 2 shows the pulse width (t = 30μ5ec) for multiple heating resistors with the same specifications but different initial resistance values.
, 120 voltage pulses with a pulse period (T=8 msec)
The pulse voltage (V
) and resistance value change rate (Drift-(R-Ro)/Ro
*100%) is an example showing the relationship. From this figure,
It can be seen that the resistance value change characteristic of the heating resistor shows a tendency for the resistance value of the heating resistor to gradually decrease to 7) as the pulse voltage increases, regardless of the initial resistance value (Ro).
また、この時のパルス電圧（Ｖ）と抵抗値変化割合（Ｄ
ｒ ｉ ｆ ｔ−（Ｒ−Ｒｏ）／Ｒｏ＊１００％）の関
係は図中に示した指数関数により、比較的精度よく近似
できることが判る。従って、このような指数関数を用い
て発熱抵抗体の抵抗値変化特性を数式化することにより
、トリミング精度および所要時間を短縮化できるもので
ある。In addition, the pulse voltage (V) and resistance value change rate (D
It can be seen that the relationship ri f t-(R-Ro)/Ro*100%) can be approximated with relatively high accuracy by the exponential function shown in the figure. Therefore, by formulating the resistance value change characteristic of the heat generating resistor using such an exponential function, it is possible to reduce trimming accuracy and time required.
第３図は発熱抵抗体に対して、パルス幅（１＝３０μ５
ｅｃ）、パルス周期（Ｔ＝８ｍｓｅｃ ）で、パルス電
圧（Ｖ）が５０．６０．７０．８０．９０ｖｏｌｔの電
圧パルスを印加した場合の、パルス印加数と発熱抵抗体
の抵抗値変化割合（Ｄｒｉｆｔ−（Ｒ−Ｒ，ｏ ） ／
Ｒｏ ＊ ］、 Ｏ０％）の関係を示した一例である
。この図より、発熱抵抗体の抵抗値は、パルス印加数の
少ない時期（１２０パルス印加以下〉に大きく低下し１
、以後パルス印加数の増加と共に徐々に低下する傾向を
示すことが判る。Figure 3 shows the pulse width (1=30μ5
ec), the number of pulses applied and the rate of change in the resistance value of the heating resistor (Drift -(R-R,o)/
This is an example showing the relationship between Ro*] and O0%). From this figure, the resistance value of the heating resistor decreases significantly when the number of pulses is small (120 pulses or less).
, it can be seen that there is a tendency to gradually decrease as the number of applied pulses increases.
本発明は、発熱抵抗体の抵抗値変化特性に応じてトリミ
ングのためのパルス電圧を決定し、所定数のパルス印加
により、発熱抵抗体の抵抗値を所定値に補正するサーマ
ルヘッドの発熱抵抗体トリミング方法であり、以下、ト
リミングの手順を説明する。The present invention provides a heating resistor of a thermal head that determines a pulse voltage for trimming according to the resistance value change characteristics of the heating resistor, and corrects the resistance value of the heating resistor to a predetermined value by applying a predetermined number of pulses. This is a trimming method, and the trimming procedure will be explained below.
まず、第２図に示したように、サーマルヘッドの発熱抵
抗体６に、パルス幅（ｔ）、パルス周期（Ｔ）の電圧パ
ルスを所定数印加した場合の、パルス電圧（Ｖ）と抵抗
値変化割合（Ｄｒ ｉ ｆ ｔ）の関係を求め、数式（
指数関数）化したものを、コンピュータ１２にインプッ
トしておき、次に、プローブ装置７を発熱抵抗体６の個
別電極３および共通電極２にセットした後、切換スイッ
チ装置８を操作して抵抗測定器９により各発熱抵抗体６
の初期抵抗値を測定し、各発熱抵抗体６を所定の抵抗値
にトリミングするだめの必要抵抗値変化割合（トリミン
グ量）をコンピュータ１２を用いて求め、さらに、先に
インプットされている発熱抵抗体６の抵抗値変化特性を
示す数式を用いて、印加すべきパルス電圧を決定し、こ
れに基づいてパルス電圧発生装置１０および切換スイッ
チ装置８を制御し、プローブ装置７を介して発熱抵抗体
６に所定の電圧パルスを印加する。その後、切換スイッ
チ装置８および抵抗測定器９を制御し、発熱抵抗体６の
抵抗値を測定する。First, as shown in FIG. 2, the pulse voltage (V) and the resistance value when a predetermined number of voltage pulses with a pulse width (t) and a pulse period (T) are applied to the heating resistor 6 of the thermal head. Find the relationship between the rate of change (Dr i f t) and use the formula (
After inputting the converted exponential function into the computer 12, the probe device 7 is set on the individual electrode 3 and the common electrode 2 of the heating resistor 6, and the changeover switch device 8 is operated to measure the resistance. Each heating resistor 6
Measure the initial resistance value of each heat generating resistor 6, use the computer 12 to determine the required resistance change rate (trimming amount) for trimming each heat generating resistor 6 to a predetermined resistance value, and then The pulse voltage to be applied is determined using a mathematical formula showing the resistance value change characteristics of the body 6, and the pulse voltage generator 10 and changeover switch device 8 are controlled based on this, and the heating resistor is A predetermined voltage pulse is applied to 6. Thereafter, the changeover switch device 8 and the resistance measuring device 9 are controlled to measure the resistance value of the heating resistor 6.
この測定された抵抗値が、目標とする所定の抵抗値まで
低下している場合にはトリミング完了と見なし以後のパ
ルス印加を行わないが、所定の抵抗値まで低下していな
い場合には、再び、同一電圧の電圧パルスを発熱抵抗体
６に印加したのち、抵抗値の測定を行うことを繰り返し
、所定の抵抗値まで低下した時点をもってトリミング完
了と見なし以後のパルス印加を行わない。If this measured resistance value has decreased to the target predetermined resistance value, it is considered that trimming has been completed and no further pulses are applied. However, if the resistance value has not decreased to the predetermined resistance value, then After applying a voltage pulse of the same voltage to the heat generating resistor 6, the resistance value is repeatedly measured, and when the resistance value has decreased to a predetermined value, trimming is regarded as complete and no further pulse application is performed.
これにより、電圧パルスを印加された発熱抵抗体６の抵
抗値は所定の抵抗値まで低下し、サーマルヘッドの発熱
抵抗体６のトリミングが全て完了する。As a result, the resistance value of the heat generating resistor 6 to which the voltage pulse has been applied is reduced to a predetermined resistance value, and the trimming of the heat generating resistor 6 of the thermal head is completely completed.
例えば、発熱抵抗体６が第２図に示した抵抗値変化特性
を持ち、トリミングにより抵抗値を１５％（トリミング
量）低下させる必要がある場合には、同図および図中に
示した数式より、発熱抵抗体６に印加すべきパルス電圧
（Ｖ）は約６７．６ｖｏｌｔとなり、パルス印加後の抵
抗値は、発熱抵抗体６の初期抵抗値（Ｒｏ）が異なり、
特性にばらつきがあっても所定の抵抗値の±２％程度に
はトリミングできるが、再度、同一電圧の電圧パルスを
印加を繰り返せば、徐々に抵抗値が低下し、抵抗値の微
調整を行えることになり、さらに高い精度で、所定の抵
抗値にトリミングすることができる。For example, if the heating resistor 6 has the resistance value change characteristics shown in Figure 2 and it is necessary to reduce the resistance value by 15% (trimming amount) by trimming, then The pulse voltage (V) to be applied to the heating resistor 6 is approximately 67.6 volts, and the resistance value after the pulse application is different from the initial resistance value (Ro) of the heating resistor 6.
Even if there are variations in characteristics, trimming can be done to about ±2% of the specified resistance value, but if the same voltage pulse is applied again, the resistance value will gradually decrease, allowing fine adjustment of the resistance value. Therefore, it is possible to trim to a predetermined resistance value with even higher accuracy.
発明の効果
以上のように、本発明では予め求めておいた発熱抵抗体
の抵抗値変化特性に応じてトリミングのためのパルス電
圧を決定し、パルス印加により、発熱抵抗体の抵抗値を
ある程度所定値に近づけた後、抵抗値をチェックしなが
ら、同一電圧の電圧パルスを印加し、パルス印加数の多
少により抵抗値の微調整を行えるため、短時間で精度よ
＜、シかも、印字性能や発熱抵抗体の寿命に悪影響を及
ばずことなく、低い製造コストで、サーマルヘッドの発
熱抵抗体の抵抗値を所定値に補正できる。Effects of the Invention As described above, in the present invention, the pulse voltage for trimming is determined according to the resistance value change characteristic of the heating resistor determined in advance, and the resistance value of the heating resistor is controlled to a certain degree by applying the pulse. After getting close to the resistance value, voltage pulses of the same voltage are applied while checking the resistance value, and the resistance value can be finely adjusted by changing the number of pulses applied. The resistance value of the heating resistor of a thermal head can be corrected to a predetermined value at low manufacturing cost without adversely affecting the life of the heating resistor.
第１図は本発明の一実施例のサーマルヘッドの発熱抵抗
体トリミング方法を用いた装置の構成図、第２図はパル
ス電圧に対する発熱抵抗体の抵抗値変化特性図、第３図
はパルス印加！’Ｌ、パルス電圧に対する発熱抵抗体の
抵抗値変化特性図、第４図は従来例のサーマルヘッドの
構造図である。
１・・・・絶縁基板、２・・・・共通電極、３・・・・
個別電極、４．・・・・抵抗体層、６・・・・発熱抵抗
体、７・・・・プローブ装置、８・・・・切換スイッチ
装置、９・・・・抵抗測定器、１ｏ・・・・パルス幅可
変パルス電圧発生器。
代理人の氏名弁理土中尾 敏男はか１名第２図
。恥＝８９Ｏｎ
Δ ％−９８σΩ
口 ＲＱニア１０１０
０ＯＰｕｌＳｅＷｆｃｔ Ｖ （ｖＯＬｔ）第３図
’ｆｔ開ＩＪ、’：６３−２５２７６０（５）１−−一
絶縁基版
６−−一翔熊祇抗体
。′［Fig. 1 is a configuration diagram of an apparatus using the heat generating resistor trimming method of a thermal head according to an embodiment of the present invention, Fig. 2 is a resistance value change characteristic diagram of the heat generating resistor with respect to pulse voltage, and Fig. 3 is a pulse application ! Figure 4 is a structural diagram of a conventional thermal head. 1...Insulating substrate, 2...Common electrode, 3...
Individual electrodes, 4. ... Resistor layer, 6 ... Heat generating resistor, 7 ... Probe device, 8 ... Changeover switch device, 9 ... Resistance measuring device, 1o ... Pulse width Variable pulse voltage generator. Name of agent: Patent Attorney Toshio Tsuchinakao (1 person) Figure 2
. Shame = 89On Δ % - 98σΩ Mouth RQ Near 1010 0OPulSeWfct V (vOLt) Figure 3 'ft open IJ,': 63-252760 (5) 1--Issulating base version 6--Issho Kumagi antibody. ′［
Claims (2)
々について、パルス幅（ｔ）、パルス周期（Ｔ）の電圧
パルスを所定数印加した場合の、パルス電圧（Ｖ）と抵
抗値変化割合（Ｄｒｉｆｔ）の関係を求める過程と、各
発熱抵抗体の初期抵抗値（Ｒｏ）を測定し、この測定値
に基づき各発熱抵抗体の抵抗値を所定の抵抗値にトリミ
ングするための必要抵抗値変化割合（トリミング量）を
求める過程と、前記発熱抵抗体の抵抗値変化の関係を用
いて、印加すべきパルス電圧を決定し、これに基づいて
発熱抵抗体にパルス幅（ｔ）、パルス周期（Ｔ）の電圧
パルスを少なくとも１回印加した所定の抵抗値に達する
までの電圧パルスを所定数印加することを繰り返す前記
発熱抵抗体の抵抗値を所定値に補正することを特徴とす
るサーマルヘッドの発熱抵抗体トリミング方法。(1) Pulse voltage (V) and resistance value change rate ( Drift) and the process of determining the initial resistance value (Ro) of each heat generating resistor, and the necessary change in resistance value to trim the resistance value of each heat generating resistor to a predetermined resistance value based on this measured value. The process of determining the ratio (trimming amount) and the relationship between the resistance change of the heating resistor are used to determine the pulse voltage to be applied, and based on this, the pulse width (t) and pulse period ( T) The thermal head is characterized in that the resistance value of the heating resistor is corrected to a predetermined value by repeatedly applying a predetermined number of voltage pulses until the voltage pulse reaches a predetermined resistance value obtained by applying the voltage pulse at least once. How to trim heating resistor.
電圧パルスを所定数印加することを繰り返す過程を経て
、前記各発熱抵抗体の抵抗値を所定値に補正することを
特徴とする特許請求の範囲第１項記載のサーマルヘッド
の発熱抵抗体トリミング方法。(2) The resistance value of each heat generating resistor is corrected to a predetermined value through a process of repeating the application of the same voltage pulse a predetermined number of times to each heat generating resistor until a predetermined resistance value is reached. A heating resistor trimming method for a thermal head according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8732087A JPS63252760A (en) | 1987-04-09 | 1987-04-09 | Thermal resistor trimming of thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8732087A JPS63252760A (en) | 1987-04-09 | 1987-04-09 | Thermal resistor trimming of thermal head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63252760A true JPS63252760A (en) | 1988-10-19 |
Family
ID=13911553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8732087A Pending JPS63252760A (en) | 1987-04-09 | 1987-04-09 | Thermal resistor trimming of thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63252760A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6451958A (en) * | 1987-08-21 | 1989-02-28 | Fuji Xerox Co Ltd | Manufacture of thick membrane-type thermal head |
| JPH04226767A (en) * | 1990-12-29 | 1992-08-17 | Kyocera Corp | Method for trimming resistor of thin film thermal head |
| JPH04269557A (en) * | 1991-02-23 | 1992-09-25 | Rohm Co Ltd | Pulse trimming device of thermal printing head |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61131404A (en) * | 1984-11-29 | 1986-06-19 | ロ−ム株式会社 | Pulse trimming for thermal head |
| JPS6359552A (en) * | 1986-08-29 | 1988-03-15 | Mitsubishi Electric Corp | Manufacture of thermal head |
-
1987
- 1987-04-09 JP JP8732087A patent/JPS63252760A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61131404A (en) * | 1984-11-29 | 1986-06-19 | ロ−ム株式会社 | Pulse trimming for thermal head |
| JPS6359552A (en) * | 1986-08-29 | 1988-03-15 | Mitsubishi Electric Corp | Manufacture of thermal head |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6451958A (en) * | 1987-08-21 | 1989-02-28 | Fuji Xerox Co Ltd | Manufacture of thick membrane-type thermal head |
| JPH04226767A (en) * | 1990-12-29 | 1992-08-17 | Kyocera Corp | Method for trimming resistor of thin film thermal head |
| JPH04269557A (en) * | 1991-02-23 | 1992-09-25 | Rohm Co Ltd | Pulse trimming device of thermal printing head |
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