JPH06416B2 - Method of equalizing resistance of thermal head - Google Patents
Method of equalizing resistance of thermal headInfo
- Publication number
- JPH06416B2 JPH06416B2 JP20400886A JP20400886A JPH06416B2 JP H06416 B2 JPH06416 B2 JP H06416B2 JP 20400886 A JP20400886 A JP 20400886A JP 20400886 A JP20400886 A JP 20400886A JP H06416 B2 JPH06416 B2 JP H06416B2
- Authority
- JP
- Japan
- Prior art keywords
- resistance value
- common line
- heating
- thermal head
- lead electrodes
- 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.)
- Expired - Lifetime
Links
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
- B41J2/345—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 characterised by the arrangement of resistors or conductors
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はファクシミリやプリンタなどに使用されるサ
ーマルヘッドの抵抗値均一化方法に関するものである。The present invention relates to a method for equalizing the resistance value of a thermal head used in a facsimile, a printer, or the like.
サーマルヘッドは発熱低抗体に略等間隔に多数のリード
電極を設けたもので、このリード電極を介して発熱抵抗
体に記録電流を流し、該発熱抵抗体に生じたジュール熱
で感熱紙を発色させたり熱転写紙のインク層を溶融させ
て記録信号情報を印字記録する。The thermal head is a low-heat-producing low-antibody provided with a large number of lead electrodes at approximately equal intervals.A recording current is applied to the heat-generating resistor via the lead electrodes, and the thermal paper is colored by the Joule heat generated in the heat-generating resistor. The recording signal information is printed and recorded by causing the ink layer of the thermal transfer paper to melt.
サーマルヘッドは上記のように、発熱抵抗体に生じたジ
ュール熱を利用して印字記録するため、発熱抵抗体の抵
抗値のばらつきは印字される画質の濃度ムラの原因とな
る。そこで、発熱抵抗体の抵抗値を均一化することが必
要である。As described above, since the thermal head prints and records using the Joule heat generated in the heating resistor, variations in the resistance value of the heating resistor cause unevenness in the printed image quality. Therefore, it is necessary to make the resistance values of the heating resistors uniform.
第３図は従来の抵抗値均一化方法を実施する装置を示す
概要図であり、図において、１は直線状に列設した多数
の発熱素子群１１，１２…からなる発熱抵抗体列，２ａ
１〜２ａｎ，２ｂ１〜２ｂｎは発熱素子群１に略等間隔
に、１つ置きに互い違いに発熱抵抗体列１の側方へ延在
させたリード電極、３は発熱素子群１の片側へ突出した
リード電極２ａ１〜２ａｎをまとめて接続した共通電
極、４１〜４ｎは発熱素子群１の他側へ突出したリード
電極２ｂ１〜２ｂｎのそれぞれに別個独立に接続された
リード接点、５は共通電極３とリード接点４１〜４ｎの
共通接続端子６との間に接続した電源である。FIG. 3 is a schematic diagram showing an apparatus for carrying out a conventional resistance value equalizing method. In the figure, 1 is a heating resistor array consisting of a large number of heating element groups 1 1 , 1 2 ... , 2a
1 ~2a n, 2b 1 ~2b n is at substantially equal intervals in the heating element group 1, the lead electrode was alternately extended to the side of the heating resistor string 1 every other, 3 of the heat generating element group 1 common electrode connected together lead electrodes 2a 1 to 2A region n projecting to one side, 4 1 to 4 n is connected to the independently to each of the lead electrodes 2b 1 ~2b n projecting to the other side of the heat generating element group 1 The lead contacts 5 are power sources connected between the common electrode 3 and the common connection terminals 6 of the lead contacts 4 1 to 4 n .
第４図は上記リレー接点４１〜４ｎを開閉するリレー駆
動回路を示すものであり、図において、７１〜７ｎはリ
レー接点４１〜４ｎを開閉するリレー、８１〜８ｎはリ
レー７１〜７ｎと直列に接続されたスイッチング素子と
してのトランジスタ、９はトランジスタ８１〜８ｎに対
し順次に駆動信号を供給する駆動信号供給回路、１０は
電源である。FIG. 4 shows a relay drive circuit that opens and closes the relay contacts 4 1 to 4 n . In the figure, 7 1 to 7 n are relays that open and close the relay contacts 4 1 to 4 n , and 8 1 to 8 n. Is a transistor as a switching element connected in series with the relays 7 1 to 7 n , 9 is a drive signal supply circuit for sequentially supplying drive signals to the transistors 8 1 to 8 n , and 10 is a power supply.
つぎに動作について説明する。駆動信号供給回路９から
の駆動信号でトランジスタ８１〜８ｎを順次に導通さ
せ、リレー７１〜７ｎの駆動でリレー接点４１〜４ｎを
閉路させ、リード電極２ａ１〜２ａｎと同２ｂ１〜２ｂ
ｎの１つを介して発熱素子群１に高圧パルスを印加す
る。Next, the operation will be described. The transistors 8 1 to 8 n are sequentially turned on by the drive signal from the drive signal supply circuit 9, the relay contacts 4 1 to 4 n are closed by driving the relays 7 1 to 7 n , and the lead electrodes 2a 1 to 2a n are connected. 2b 1 to 2b
A high-voltage pulse is applied to the heating element group 1 via one of n .
この高圧パルスの印加によって発熱素子群１の抵抗値が
減少するので、これを利用して抵抗値のばらつきを減少
させて該抵抗値の均一化を図るものである 〔発明が解決しようとする問題点〕 従来のサーマルヘッドの抵抗値均一化方法は以上のよう
に実施されているので、例えばリード電極２ａ１（〜２
ａｎ）と２ｂ１（〜２ｂｎ）との間に高圧パルスを印加
した場合、リード電極２ｂ１にはその両側に位置する共
通電極３側のリード電極２ａ１と２ａ２から発熱素子１
１，１２（リード電極２ａ１と２ｂ１，同２ａ２と２ｂ
１の間の発熱素子）を経由して高圧パルスが印加され
る。Since the resistance value of the heating element group 1 is reduced by the application of this high-voltage pulse, this is utilized to reduce the dispersion of the resistance value and to make the resistance value uniform. Points] Since the conventional method of equalizing the resistance value of the thermal head is carried out as described above, for example, the lead electrode 2a 1 (to 2
When applying a high voltage pulse between a n) and 2b 1 and (~2b n), the heating elements from the common electrode 3 side of the lead electrodes 2a 1 and 2a 2 located on both sides of the lead electrodes 2b 1 1
1 , 1 2 (lead electrodes 2a 1 and 2b 1 , 2a 2 and 2b
A high voltage pulse is applied via the heating element 1 ).
このため、一度に２つの発熱素子１１，１２をトリミン
グすることになる。従つて、１つの発熱素子のトリミン
グを実施し抵抗値を調整したとしても、２つの発熱素子
の平均抵抗値を調整したことになり、微小単位では調整
されていないことになるという問題点があった。Therefore, the two heating elements 1 1 and 1 2 are trimmed at one time. Therefore, even if the trimming of one heating element is performed and the resistance value is adjusted, the average resistance value of the two heating elements is adjusted, and there is a problem that it is not adjusted in minute units. It was
この発明は上記のような問題点を解消するためになされ
たもので、発熱素子の抵抗値を微小単位で均一調整でき
るようにすることを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to uniformly adjust the resistance value of a heating element in minute units.
請求項１記載の発明に係るサーマルヘッドの抵抗値均一
化方法は、直線状に形成される多数の発熱抵抗体列の両
側に１つ置きに互い違いに発熱抵抗体列の側方にリード
電極を延在させ、その一方の側におけるリード電極を１
つ置きにまとめて第１又は第２の共通線に接続し、これ
ら第１の共通線と第２の共通線とをスイッチの切換えに
よって、上記他方のリード電極のうちの所定のリード電
極に対して上記第１又は第２の共通線を介し、所定の各
発熱抵抗体に電圧パルスを供給することを特徴とする。In the method of equalizing the resistance value of the thermal head according to the invention of claim 1, the lead electrodes are staggered alternately on both sides of the plurality of linearly formed heating resistor rows. Extend the lead electrode on one side
Every other group is connected to the first or second common line, and the first common line and the second common line are switched to switch a predetermined lead electrode among the other lead electrodes. In addition, a voltage pulse is supplied to each predetermined heating resistor via the first or second common line.
そして、請求項２記載の発明に係るサーマルヘッドの抵
抗値均一化方法は、抵抗値均一化を行なった後に、一方
の側におけるリード電極と第１及び第２の共通線とを共
通電極によって一体化したことを特徴とする。In the method of equalizing the resistance value of the thermal head according to the second aspect of the present invention, after the resistance value is equalized, the lead electrode on one side and the first and second common lines are integrated by the common electrode. It is characterized by having become.
請求項１および２の発明における抵抗値均一化方法によ
れば、発熱素子には必ず一対のリード電極のみを介して
高圧パルスが印加され、発熱素子を全て均一な抵抗値に
調整することができる。According to the resistance value equalizing method of the first and second aspects of the present invention, a high-voltage pulse is always applied to the heating element only through the pair of lead electrodes, and the heating element can be adjusted to have a uniform resistance value. .
以下、この発明の一実施例を図について説明する。第１
図において、１１ａ，１１ｂは共通線であり、この共通
線１１ａ，１１ｂには発熱素子群１の片側へ突出したリ
ード電極２ａ１〜２ａｎを１つ置きにまとめて接続され
ている。１２は共通線１１ａ，１１ｂを交互に電源５に
接続するリレー接点である。なお、前記第３図と同一部
分には同一符号を付して説明を省略する。An embodiment of the present invention will be described below with reference to the drawings. First
In FIG., 11a, 11b is a common line are connected together lead electrodes 2a 1 to 2A region n projecting to one side of the heat generating element group 1 are alternately in the common line 11a, 11b. Reference numeral 12 is a relay contact that alternately connects the common lines 11a and 11b to the power source 5. The same parts as those in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.
第２図はリレー駆動回路を示すもので、前記第４図と同
一部分には同一符号を付し、１３ａ，１３ｂはリレー接
点１２を共通線１１ａ側の接点ａと共通線１１ｂ側の接
点ｂとに交互に切換えるリレー、１４ａ，１４ｂはリレ
ー１３ａ，１３ｂと直列に接続されたスイッチング素子
としてのトランジスタである。FIG. 2 shows a relay drive circuit. The same parts as those in FIG. 4 are designated by the same reference numerals, and 13a and 13b are relay contacts 12 which are a contact a on the common line 11a side and a contact b on the common line 11b side. Relays for alternately switching to and, and 14a and 14b are transistors as switching elements connected in series with the relays 13a and 13b.
つぎに動作について説明する。まず、発熱素子１１の抵
抗値を減少させる場合、駆動信号発生回路９からの駆動
信号でトランジスタ８１と１４ａを導通させてリレー７
１と１３ａを駆動させ、リレー接点４１を閉成すると同
時にリレー接点１２を接点ａ側つまり共通線１１ａに閉
成する。Next, the operation will be described. First, when the resistance value of the heating element 1 1 is reduced, the drive signal from the drive signal generation circuit 9 makes the transistors 8 1 and 14a conductive and the relay 7
Drives the 1 and 13a, and at the same time to close the relay contacts 4 1 to close the relay contact 12 to the contact a side, that the common line 11a.
これにより、発熱素子１１（リード電極２ａ１と同２ｂ
１の間の発熱素子）にのみ、リード電極２ａ１と同２ｂ
１を通じて電源５から高圧パルスが印加され、抵抗値を
減少させることができる。そして、抵抗値を測定手段
（図示せず）で測定し、発熱素子１１が目標の抵抗値に
なっていない場合は、前回よりも電圧値を高めた電圧パ
ルスを再び印加し、目標の抵抗値になったところで発熱
素子１１に対する高圧パルス印加を終了する。As a result, the heating elements 1 1 (lead electrodes 2a 1 and 2b
Only the heating element) between 1, the lead electrodes 2a 1 and the same 2b
A high-voltage pulse is applied from the power source 5 through 1 to reduce the resistance value. Then, the resistance value measured by the measuring means (not shown), if the heating elements 1 1 is not in the resistance value of the target again by applying a voltage pulse with higher voltage value than the previous target of resistance to end the high-voltage pulse applied to the heating element 1 1 upon reaching the value.
つぎに駆動信号発生回路９からの駆動信号でトランジス
タ８１と１４ｂを導通させてリレー７１と１３ｂを駆動
させ、リレー接点４１を閉成すると同時にリレー接点１
２を接点ｂ側つまり共通線１１ｂに切換える。Next, the drive signal from the drive signal generation circuit 9 causes the transistors 8 1 and 14b to conduct to drive the relays 7 1 and 13b to close the relay contact 4 1 and at the same time the relay contact 1
2 is switched to the contact b side, that is, the common line 11b.
これにより、発熱素子１２（リード電極２ａ２と同２ｂ
１の間の発熱素子）にのみリード電極２ａ２と同２ｂ１
を通じて電源５から高圧パルスが印加され、発熱素子１
２の抵抗値減少が行なわれる。以下、同様の動作を全て
の発熱素子について実施する。そして、全ての発熱素子
について抵抗値均一化動作が終了したら、リード電極２
ａ１〜２ａｎと共通線１１ａ，１１ｂを鎖線示の共通電
極１５で一体化する。この共通電極１５は導電ペースト
を用いて印刷，焼成（500℃以下）するものである。As a result, the heating element 1 2 (same as the lead electrodes 2a 2 and 2b)
The heat generating element between 1 ) is the same as the lead electrodes 2a 2 and 2b 1
A high voltage pulse is applied from the power source 5 through the heating element 1
The resistance value is reduced by 2 . Hereinafter, the same operation is performed for all the heating elements. When the resistance value equalizing operation is completed for all the heating elements, the lead electrodes 2
a 1 to 2A region n and the common line 11a, 11b integrated with a common electrode 15 of the chain line indicates. The common electrode 15 is printed and fired (500 ° C. or less) using a conductive paste.
以上のように、請求項１および２の発明における抵抗値
均一化方法によれば、多数の発熱素子を列設した発熱抵
抗体列には必ず一対のリード電極のみを介して順次に高
圧パルスが印加され、発熱抵抗体列をなす多数の発熱素
子を全て均一な抵抗値に調整することができる。As described above, according to the resistance value equalizing method of the first and second aspects of the present invention, a high-voltage pulse is always sequentially provided only to a pair of lead electrodes in a heating resistor array in which a large number of heating elements are arranged. It is possible to adjust all of a large number of heating elements that are applied and form a heating resistor array to have a uniform resistance value.
第１図はこの発明の一実施例による抵抗値均一化方法を
実施する装置の概要図、第２図はリレー駆動回路図、第
３図は従来の抵抗値均一化方法を実施する装置の概要
図、第４図はリレー駆動回路図である。 １は発熱素子群、２ａ１〜２ａｎ，２ｂ１〜２ｂｎはリ
ード電極、４１〜４ｎはリレー接点、５は電源、１１
ａ，１１ｂは共通線、１２はリレー接点。 なお、図中、同一符号は同一又は相当部分を示す。FIG. 1 is a schematic diagram of an apparatus for implementing a resistance value equalizing method according to an embodiment of the present invention, FIG. 2 is a relay drive circuit diagram, and FIG. 3 is an outline of an apparatus for implementing a conventional resistance value equalizing method. FIG. 4 and FIG. 4 are relay drive circuit diagrams. 1 is a heating element group, 2a 1 to 2a n , 2b 1 to 2b n are lead electrodes, 4 1 to 4 n are relay contacts, 5 is a power source, 11
a and 11b are common lines, and 12 is a relay contact. In the drawings, the same reference numerals indicate the same or corresponding parts.
フロントページの続き (72)発明者 尾崎 裕 兵庫県尼崎市塚口本町８丁目１番１号 三 菱電機株式会社通信機製作所内 (72)発明者 高瀬 弥平 兵庫県尼崎市塚口本町８丁目１番１号 三 菱電機株式会社通信機製作所内Front page continuation (72) Inventor Hiroshi Ozaki 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Sanryo Electric Co., Ltd. Communications Machinery Works (72) Inventor Yahei Takase 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture No. Sanryo Denki Co., Ltd.
Claims (2)
る発熱抵抗体列に電圧パルスを印加する多数のリード電
極を、１つ置きに互い違いに発熱抵抗体列の側方に延在
させ、その一方の側に延在させた上記リード電極を１つ
置きにまとめて第１又は第２の共通線に接続し、これら
第１の共通線と第２の共通線とをスイッチの切換えによ
って、電源の一端に接続し、上記発熱抵抗体列の他方の
側に延在させたリード電極のうちの所定のリード電極と
上記第１又は第２の共通線を介し、順次に所定の発熱素
子に電圧パルスを供給することにより、多数の発熱素子
を列設した発熱抵抗体列の抵抗値の均一化を行なうこと
を特徴とするサーマルヘッドの抵抗値均一化方法。1. A large number of lead electrodes for applying a voltage pulse to a heating resistor array consisting of a plurality of linearly-shaped heating elements, alternately extending every other side of the heating resistor array. , Every other one of the lead electrodes extending to one side thereof is connected to the first or second common line, and the first common line and the second common line are switched by a switch. , A predetermined heating element, which is connected to one end of a power supply and extends through the other side of the heating resistor array and a predetermined lead electrode and the first or second common line. A method of equalizing the resistance value of a thermal head, characterized in that the resistance value of a heating resistor array in which a large number of heating elements are arrayed is made uniform by supplying a voltage pulse to the.
おけるリード電極と第１及び第２の共通線とを共通電極
によって一体化した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抵抗値均一化方法。2. The lead electrode on one side and the first and second common lines are integrated by a common electrode after uniformizing the resistance values. Method of equalizing the resistance value of the thermal head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20400886A JPH06416B2 (en) | 1986-08-29 | 1986-08-29 | Method of equalizing resistance of thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20400886A JPH06416B2 (en) | 1986-08-29 | 1986-08-29 | Method of equalizing resistance of thermal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6359555A JPS6359555A (en) | 1988-03-15 |
| JPH06416B2 true JPH06416B2 (en) | 1994-01-05 |
Family
ID=16483242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20400886A Expired - Lifetime JPH06416B2 (en) | 1986-08-29 | 1986-08-29 | Method of equalizing resistance of thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06416B2 (en) |
-
1986
- 1986-08-29 JP JP20400886A patent/JPH06416B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6359555A (en) | 1988-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |