JPS59138477A - Discriminator for condition of heating element in heat-sensitive type printer - Google Patents
Discriminator for condition of heating element in heat-sensitive type printerInfo
- Publication number
- JPS59138477A JPS59138477A JP58012426A JP1242683A JPS59138477A JP S59138477 A JPS59138477 A JP S59138477A JP 58012426 A JP58012426 A JP 58012426A JP 1242683 A JP1242683 A JP 1242683A JP S59138477 A JPS59138477 A JP S59138477A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- heating element
- printing
- transistor
- supplied
- 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.)
- Granted
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
- B41J2/35—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
- B41J2/355—Control circuits for heating-element selection
Abstract
Description
【発明の詳細な説明】
この発明は一、感熱式印字装置において、その印字装置
に設けている発熱体の良否を判別する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates, first, to a device for determining the quality of a heating element provided in a thermal printing device.
一般に・感熱して発色する薬品を塗布した印字用紙に、
所定の文字・記号）符号等を構成するように配置した発
熱体を押圧し１発熱体に通電してこれを発熱させて印字
する印字装置がある。このような印字装置では１発熱体
を印字用紙に押圧するので、印字用紙によって発熱体が
摩耗したり、発熱体が自己発熱して溶融したり＼印字用
紙に付着している塵芥等によって発熱体が削りとられた
りした結果１発熱体が破損することがある。発熱体が破
損しているか否かチェックする方法としては、各発熱体
に短時間づつ順に電圧を印加し１そのときの電流量によ
って発熱体の良否を判別することが考えられるが、良否
をチェックする際の印加電圧に印字を行なう場合の印加
電圧を用いると、短時間でも発熱体が発熱し・印字用紙
が発色するという問題があり１また印字用の電圧を印加
しているので１印字を行なう場合と同程度の疲労が発熱
体に発生するという問題もあった。Generally, print paper coated with heat-sensitive and color-producing chemicals,
2. Description of the Related Art There is a printing device that prints by pressing heating elements arranged to form predetermined characters, symbols, etc., and applying electricity to one heating element to generate heat. In such a printing device, one heating element is pressed against the printing paper, so the heating element may be worn away by the printing paper, the heating element may self-heat and melt, or the heating element may be damaged by dust etc. attached to the printing paper. The heating element 1 may be damaged as a result of being scraped off. A possible way to check whether a heating element is damaged or not is to apply voltage to each heating element in turn for a short period of time and determine whether the heating element is good or bad based on the amount of current at that time. If the applied voltage for printing is used for the applied voltage when printing, there is a problem that the heating element will generate heat even for a short time and the printing paper will develop color. There was also the problem that the same degree of fatigue occurred in the heating element as in the case where the heating element was used.
この発明は１上記の両問題を解決した発熱体の良否判別
装置を提供することを目的とし、そのため良否判別の際
に発熱体に′印加する電圧に印字用電圧よりも低い電圧
を用いたものである。The purpose of this invention is to provide a device for determining the quality of a heating element that solves both of the above-mentioned problems, and for this purpose, a voltage lower than the printing voltage is used as the voltage applied to the heating element when determining the quality of the heating element. It is.
以下１この発明をバーコードラベルプリンタに実施した
２つの実施例に基づいて詳細に説明する。Hereinafter, the present invention will be explained in detail based on two embodiments in which the present invention is implemented in a barcode label printer.
なお１バーコードプリンタとは＼者数子を黒バーあるい
は白バー７木の組合せで表わしたバーコードを印字する
ものである。Note that a barcode printer prints a barcode in which the digit number is expressed by a combination of black bars or white bars.
第１図乃至第３図に第１の実施例を示す。第１図におい
て、２−１１２−２・・・２−ｎは抵抗発熱体で＼同図
には示していないが＼これらは横一列に配置されている
。これらの各一端部はトランジスタ４−１％４−２・・
・４−Ｈのコレクタ・エミッタ導電路を介して接地され
ている。これらトランジスタ４−１乃至４−ｎのベース
は１印段のシフトレジスタ６のそれぞれ対応する段に接
続されている。なお１８１８・・・ １０％ １０・・
・はバイアヌ抵抗器である。A first embodiment is shown in FIGS. 1 to 3. In FIG. 1, 2-112-2...2-n are resistance heating elements (not shown in the figure), which are arranged in a horizontal row. One end of each of these is a transistor 4-1%4-2...
- Grounded via the collector-emitter conductive path of 4-H. The bases of these transistors 4-1 to 4-n are connected to respective stages of a one-stage shift register 6. In addition, 1818... 10% 10...
・is a Baianne resistor.
抵抗発熱体２−１乃至２−ｎの他端は一トランジスタ１
２のエミッタ・コレクタ導電路を介して印字用電源線１
４に接続されている。また、抵抗発熱体２−１乃至２−
ｎの他端は為ダイオード１６及び抵抗器１８の直列回路
を介して判別用電源線２０にも接続されている。印字用
電源線１４の電圧は通常１０乃至３０Ｖで１判別用電源
線２０の電圧は５ｖで１この５ｖの電圧は後述する中央
処理装置にも電源電圧として供給される。なお％ ２２
％ ２４はトランジスタ１２用のバイアス用抵抗器であ
る０バイアヌ用抵抗器２４を介してトランジスタ１２の
ベースには中央処理装置２６から印字信号２７が供給さ
れる。中央処理装置２６には、抵抗器１８とダイオード
１６との接続点２８の電圧を検出する電圧検出部３ｏか
らの信号も供給される。The other ends of the resistance heating elements 2-1 to 2-n are connected to one transistor 1.
Printing power supply line 1 via the emitter-collector conductive path of 2
Connected to 4. In addition, resistance heating elements 2-1 to 2-
The other end of n is also connected to a discrimination power supply line 20 via a series circuit of a diode 16 and a resistor 18. The voltage of the printing power supply line 14 is normally 10 to 30V, and the voltage of the discrimination power supply line 20 is 5V, and this 5V voltage is also supplied as a power supply voltage to a central processing unit, which will be described later. In addition, % 22
% 24 is a bias resistor for the transistor 12, and a print signal 27 is supplied to the base of the transistor 12 from the central processing unit 26 via a 0 bias resistor 24. The central processing unit 26 is also supplied with a signal from a voltage detection section 3o that detects the voltage at a connection point 28 between the resistor 18 and the diode 16.
中央処理装置２６は１印字データに基づいてトランジス
タ１２１ シフトレジスタ６を制御して、所定の抵抗発
熱体を発熱させて＼印字用紙に印字を行なえるようにプ
ログラムされており、さらにシフトレジスタ６を制御し
て、電圧検出部３ｏの出力に基づいて各抵抗発熱体２−
１乃至２−Ｈの良否を判別するようにもプログラムされ
ている。The central processing unit 26 is programmed to control the transistor 121 and shift register 6 based on one print data to generate heat in a predetermined resistance heating element and print on printing paper. Each resistance heating element 2- is controlled based on the output of the voltage detection section 3o.
It is also programmed to determine the acceptability of 1 to 2-H.
印字プログラムを第２図を参照しながら説明すると、中
央処理装置２６は入力された印字データに基づいて発熱
させようとする抵抗発熱体に対応するシフトレジスタ６
の段、例えば抵抗発熱体２−２を発熱させる場合には第
２段をＨレベルにセットするように印字データ信号３４
を供給する。次いでシフトレジスタ６に供給されている
出力イネーブル信号３６をＨレベルにする。これによっ
てｘ トランジスタ４−２のべ一ヌにＨレベル信号が供
給される。次いでトランジスタ１２に供給されている印
字信号２７をＬレベルにする。これによって１トランジ
ヌタ１２を導通させ・印字用電源線１４がら発熱体２−
２Ｘトランジスタ４−２を介して電流が流れ１発熱体２
−２が発熱し１印字用紙の発色が開始される０発色する
のに充分な時間の経過後（この時間はタイマによって計
測されている。）、印字信号２７をＨレベルにし＼ ト
ランジスタ１２を非導通状態とし１抵抗発熱体２−２・
トランジスタ４−２への電流の供給を停止する。その後
・全ての印字が終了したか否か判別し１未終了の場合に
は上述したのと同様に印字を繰返し・終了の場合には停
止する。To explain the printing program with reference to FIG. 2, the central processing unit 26 controls the shift register 6 corresponding to the resistance heating element to be heated based on the input printing data.
For example, when the resistive heating element 2-2 generates heat, the print data signal 34 is set so that the second stage is set to H level.
supply. Next, the output enable signal 36 supplied to the shift register 6 is set to H level. As a result, an H level signal is supplied to the base of the x transistor 4-2. Next, the print signal 27 supplied to the transistor 12 is set to L level. As a result, the first transistor 12 is made conductive and the printing power supply line 14 is connected to the heating element 2-.
Current flows through 2X transistor 4-2, 1 heating element 2
-2 generates heat and 1 print paper starts to develop color. 0 After sufficient time has elapsed for the color to develop (this time is measured by a timer), print signal 27 is set to H level ＼ Transistor 12 is turned off. 1 resistance heating element 2-2.
The supply of current to transistor 4-2 is stopped. Thereafter, it is determined whether all printing has been completed, and if it has not been completed, printing is repeated in the same manner as described above; if it has been completed, it is stopped.
次に第３図を参照しながら抵抗発熱体の良否の判別プロ
グラムについて説明する。まず中央処理装置２６は抵抗
発熱体２−１乃至２−Ｈの総数ｎを適当なレジスタＸに
セットする。次いでデータ信号３４によってシフトレジ
スタ６の１段目をＨレベルにする０そして出力イネーブ
ル信号３６をＨレベルにする。これによってトランジス
タ４−１のベア ニＨｖ ヘルカ供給され、トランジス
タ４−１１抵抗発熱体２−１には判別用電源線２ｏから
電流が流れる。ここで１トランジスタ１２は非導通状態
であるので１印字用電源線１４から抵抗発熱体２−１１
トランジスタ４−１には電流が流れない。このとき・接
続点２８の電圧■２８を電圧検出部３０で測定し、これ
を予め定めた上限値及び下限値と比較し１下限値〈ｖ３
８〈上限値であれば正常と判別する。すなわちゝｖ２８
は１
■２８＝ （”２（ｌ Ｖ＋６−Ｖ４−１ ） ×７
１’−＜ ｖ、６＋ｖ４− 、 ）で表わされる。ただ
し、
ｖ２ｏ： 判別用電源線２０の電圧
ｖ１６： ダイオード１６のアノード・カソード間の
電圧
■ ： トランジスタ４−１のコレクタ・エミツ１
り間の電圧
ｒ： 抵抗発熱体２−１の抵抗値
Ｒ： 抵抗器１８の抵抗値
である。今、抵抗発熱体２−１が断線していると、ｒは
無限大となり、ｖ２８は
ｖ２８＝■２゜
となる。また抵抗発熱体２−１が短絡していると１ｒは
０となり、■２８は
■２ｇ−”１６十ｖ４−１
となる。従って、■２ｏより幾分低い上限値とｖ１６十
ｖ４−１ より幾分高い下限値とｖ２８を比較し、下限
値〈ｖ２８〈上限値であれば正常であると判別すること
ができる。しかし、実際には断線・短絡以外にも抵抗発
熱体の摩擦、部分的短絡等で正常な発熱を行なわないこ
ともあり、これも異常として判別する必要がある。逆に
各抵抗発熱体の抵抗値にはそれぞればらつきがあるので
、このばらつき範囲内のものを誤って異常と誤判別しな
いようにする必要がある。従って、上限値■Ｈ１下限値
■Ｌは、と定め、■、＜■２８〈■□であれば正常と判
別する。Next, a program for determining the quality of a resistance heating element will be explained with reference to FIG. First, the central processing unit 26 sets the total number n of resistance heating elements 2-1 to 2-H in an appropriate register X. Next, the first stage of the shift register 6 is set to H level by the data signal 34, and the output enable signal 36 is set to H level. As a result, a bare Hv voltage is supplied to the transistor 4-1, and a current flows from the discrimination power supply line 2o to the transistor 4-11 and the resistance heating element 2-1. Here, since the first transistor 12 is in a non-conducting state, the first printing power supply line 14 is connected to the resistance heating element 2-11.
No current flows through transistor 4-1. At this time, the voltage 28 at the connection point 28 is measured by the voltage detection unit 30, and compared with the predetermined upper and lower limit values, the lower limit value is determined as follows.
8 If it is the upper limit value, it is determined to be normal. In other words, v28
is 1 ■28= (”2(l V+6-V4-1) ×7
1'-<v, 6+v4-, ). However, v2o: Voltage of the discrimination power supply line 20 v16: Voltage between the anode and cathode of the diode 16 ■: Voltage between the collector and emitter of the transistor 4-1 r: Resistance value R of the resistance heating element 2-1: This is the resistance value of the resistor 18. Now, if the resistance heating element 2-1 is disconnected, r becomes infinite and v28 becomes v28=■2°. Also, if the resistance heating element 2-1 is short-circuited, 1r becomes 0, and ■28 becomes ■2g-"160 v4-1. Therefore, the upper limit value is somewhat lower than ■2o, and v160 v4-1. By comparing v28 with a somewhat higher lower limit value, it is possible to determine that it is normal if the lower limit value < v28 < upper limit value. However, in reality, in addition to disconnections and short circuits, there are also problems such as friction of the resistance heating element, partial Normal heat generation may not occur due to short circuits, etc., and this also needs to be determined as an abnormality.On the other hand, since the resistance value of each resistance heating element varies, it is mistakenly assumed that something within this variation range is abnormal. Therefore, the upper limit value ■H1 and the lower limit value ■L are determined as follows, and if ■, <■28〈■□, it is determined to be normal.
ただし、＋Δで：抵抗発熱体２−１の抵抗値の許容上限
偏差
ぺＶ：抵抗発熱体２−１の抵抗値の許容下限偏差
である。However, +Δ: Permissible upper limit deviation of the resistance value of the resistance heating element 2-1 PV: Permissible lower limit deviation of the resistance value of the resistance heating element 2-1.
ｆ□
この判別後にレジスタＸの値を１つ減算し１そのレジス
タＸの値がＯか否か判別する。０でなければシフトレジ
スタ６を１段シフトさせ＼出力イネーブル信号３６をＨ
レベルにしＡ以下、これを繰返す。レジスタＸの値がＯ
のとき１すなわち全ての抵抗発熱体２−１乃至２−Ｈに
ついて判別が終了すると）プログラムは終了する。f□ After this determination, the value of register X is subtracted by one, and it is determined whether the value of register X is O or not. If it is not 0, shift the shift register 6 by one stage and set the output enable signal 36 to H.
Level up to A or lower and repeat this. The value of register X is O
(1, that is, when the determination is completed for all the resistance heating elements 2-1 to 2-H), the program ends.
第２の実施例は１第４図に示すように中央処理装置を用
いずに１印字及び良否の判別を行なうもので、第１の実
施例と同等部分には同一符号を付して説明を省略する。The second embodiment, as shown in Fig. 1, performs one printing and determines whether it is good or bad without using a central processing unit, and the same parts as those in the first embodiment are given the same reference numerals and explained. Omitted.
シフトレジスタ６のデータ信号供給端子３８にＨレベル
の信号を供給し、そしてシフト信号供給端子３９にシフ
ト信号を供給し、所定の段１例えば第２段６−２をＨレ
ベルにする。An H level signal is supplied to the data signal supply terminal 38 of the shift register 6, and a shift signal is supplied to the shift signal supply terminal 39, thereby setting a predetermined stage 1, for example, the second stage 6-2, to the H level.
そしてイネーブル端子４０にＨレベルのイネーブル信号
を供給し）アンドゲート４２−２を介してトランジスタ
４−２のベースにＨレベル信号を供給スる。この状態で
一、Ｒ−Ｓフリンプ・フロツグ４４のＳ端子にＨレベル
信号を供給すると・Ｑ、出力がＨＬ／／＜ルとなす、ト
ランジスタ４６のベースにＨレベル信号が供給される。Then, an H-level enable signal is supplied to the enable terminal 40), and an H-level signal is supplied to the base of the transistor 4-2 via the AND gate 42-2. In this state, when an H level signal is supplied to the S terminal of the R-S flip-flop 44, an H level signal is supplied to the base of the transistor 46 whose output becomes HL//<.
これによってトランジスタ４６．１２が導通し＼抵抗発
熱体２−２とトランジスタ４−２とに印字用電源線１４
から電流が流れ・抵抗発熱体２−２が発熱する。印字用
紙が発色するのに充分な時間が経過した後にＲ−Ｓフリ
ップ・フロップ４４の置端子にＨレベル信号をタイマー
等によって自動的に供給し・Ｑ、出力をＬレベルとして
電流の供給を停止し、１つのバーコードの印字が終了す
る。以下・同様にして所定のバーコードが印字される。This makes the transistor 46.12 conductive and connects the printing power supply line 14 to the resistance heating element 2-2 and the transistor 4-2.
A current flows through the resistive heating element 2-2, and the resistance heating element 2-2 generates heat. After sufficient time has elapsed for the printing paper to develop color, an H level signal is automatically supplied to the terminal of the R-S flip-flop 44 by a timer etc. Q, the output is set to L level and the supply of current is stopped. Then, printing of one barcode is completed. A predetermined barcode is printed in the same manner as follows.
抵抗発熱体の良否を判別する場合１デ一タ信号供給端子
３８にＨレベルの信号を供給し１シフト信号供給端子３
９にシフト信号を供給し、シフトレジスタ６の第１段６
−１をＨレベルにする。そして１イネーブル端子４０に
Ｈレベルのイネーブル信号を供給し１アンドゲート４２
−１を介してトランジスタ４−１のベースにＨレベルの
信号を供給する。When determining the quality of the resistance heating element, an H level signal is supplied to the 1 data signal supply terminal 38, and the 1 shift signal supply terminal 3 is supplied with an H level signal.
9 to supply a shift signal to the first stage 6 of the shift register 6.
-1 to H level. Then, an H level enable signal is supplied to the 1 enable terminal 40, and the 1 AND gate 42
An H level signal is supplied to the base of the transistor 4-1 via -1.
これによって、抵抗器１８及びダイオード１６を介して
判別用電源線２０から抵抗発熱体２−１及びトランジス
タ４−１に電流が流れる。As a result, current flows from the discrimination power supply line 20 to the resistance heating element 2-1 and the transistor 4-1 via the resistor 18 and diode 16.
このとき１接続点２８の電圧ｖ２８を比較器４８によっ
て上限電圧と比較すると共に１比較器５０によって下限
電圧と比較する。上限電圧は基準電源５２によって、下
限電圧は基準電源５４によってそれぞれ与えられる。比
較器４８は”２Ｂが基準上限電圧より高いときＨレベル
の信号を生成し為比較器５０はＶ２８が下限電圧より低
いときＨレベルの信号を生成する。従って、両比較器４
８％ ５０の信号が供給されている＼オア回路５６は１
下限電圧〈Ｖ２８〈上限電圧以外の々き、不良表示器５
８にＲレベル信号を供給し、これを動作させる。以下、
Ｈレベルとなる段をシフト信号によって順次変更して同
様に良否を判別する。At this time, the voltage v28 at the one connection point 28 is compared with the upper limit voltage by the comparator 48, and also compared with the lower limit voltage by the one comparator 50. The upper limit voltage is given by a reference power supply 52, and the lower limit voltage is given by a reference power supply 54. Comparator 48 generates an H level signal when V28 is higher than the reference upper limit voltage, and comparator 50 generates an H level signal when V28 is lower than the lower limit voltage.
8% 50 signals are supplied\OR circuit 56 is 1
Lower limit voltage <V28> Other than upper limit voltage, faulty indicator 5
8 is supplied with an R level signal to operate it. below,
The stage that becomes H level is sequentially changed by the shift signal, and pass/fail is determined in the same way.
これら良否判別装置では１各抵抗発熱体の良否を判別す
る際、電圧が印字用電源線１４よりも低い判別用電源線
２０から各発熱抵抗体に電流を流しているので、発熱量
が少なく、印字用紙が発色することがすく、シかも各抵
抗発熱体に疲労が生じることもない。In these quality determination devices, when determining the quality of each resistance heating element, current is passed through each heating resistor from the determination power line 20 whose voltage is lower than the printing power line 14, so the amount of heat generated is small. The printing paper is less likely to develop color, and the resistance heating elements are not fatigued.
（’ＩＩ・）
なお、印字を行なう際、各抵抗発熱体には判別用電源線
２０からも電流が流れるが、印字には別段影響を与えな
いので問題はない。第２の実施例では１比較器４８．５
０を用いたが、これらに代えてＡ／Ｄ変換器を用い）そ
の変換値から良否を判別してもよい。('II.) Note that when printing, current also flows from the discrimination power supply line 20 to each resistance heating element, but this does not cause any problem as it does not particularly affect the printing. In the second embodiment 1 comparator 48.5
0 is used, but instead of these, an A/D converter may be used to determine the quality from the converted value.
第１図はこの発明による良否判別装置を実施した感熱式
印字装置の第１の実施例のブロック図、第２図は同第１
の実施例の印字過程を示すフｏ −チャート、第３図は
同第１の実施例の判別過程を示すフローチャート、第４
図は同第２の実施例のブロック図である。
２−１乃至２−ｎ・・・発熱体、４−１乃至４−ｎ・・
・第１の半導体スイッチング素子）６・・・シフトレジ
ヌタ１１２・・・第２の半導体スイッチング素子・１４
・・・印字用電源、１８・・・抵抗器、２ｏ・・・判別
ＪｆＪ電源１２６・４４・・・第２の付勢信号供給手段
、３０．４８％ ５０・・・比較手段。
（Ｉ２）
′Ｘ７ 図
才２図FIG. 1 is a block diagram of a first embodiment of a thermal printing device implementing a quality determination device according to the present invention, and FIG.
FIG. 3 is a flow chart showing the printing process of the first embodiment; FIG. 4 is a flow chart showing the discrimination process of the first embodiment;
The figure is a block diagram of the second embodiment. 2-1 to 2-n... heating element, 4-1 to 4-n...
・First semiconductor switching element) 6...Shift resistor 112...Second semiconductor switching element 14
. . . Printing power supply, 18 . . . Resistor, 2o . (I2) 'X7 Figure 2
Claims (1)
印字用紙に押圧される複数の発熱体と、第１の付勢信号
が供給されている期間中だけ導通する複数の第１の半導
体スイッチング素子とをそれぞれぽ列に接続し、これら
直列回路を互いに並列に接続し・この並列回路を第２の
付勢信号が供給されている期間中だけ導通する第２の半
導体スイッチング素子を介して印字用電源に接続し、容
筒１の半導体ヌインチング素子に第１の付勢信号を順に
供給するシフトレジスタを設け・第２の半導体スイッチ
ング素子に第２の付勢信号を供給する手段を設けてなる
感熱式印字装置において・上記並列回路を電圧が上記印
字用電源よりも低い判別用電源に共通の抵抗器を介して
接続し、上記抵抗器と上記並列回路との接続点の電圧を
基準電圧と比較する比較手段を設けてなるＥ熱式印字装
置の発熱体良否判別装置。(1) A plurality of heating elements that are arranged in a predetermined shape and are pressed against the printing paper whose heat-sensitive portions develop color, and a plurality of first semiconductors that are electrically connected only during the period when the first energizing signal is supplied. These series circuits are connected in parallel with each other, and the parallel circuit is connected through a second semiconductor switching element that is conductive only during the period when the second energizing signal is supplied. A shift register connected to a printing power source and sequentially supplying a first energizing signal to the semiconductor nulling elements of the container 1 is provided, and a means for supplying a second energizing signal to the second semiconductor switching element is provided. In a thermal printing device, the above parallel circuit is connected to a discrimination power supply whose voltage is lower than the above printing power supply via a common resistor, and the voltage at the connection point between the above resistor and the above parallel circuit is set as the reference voltage. A heat generating element quality determination device for an E thermal printing device, which is provided with a comparison means for comparing with the heat generating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012426A JPS59138477A (en) | 1983-01-27 | 1983-01-27 | Discriminator for condition of heating element in heat-sensitive type printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012426A JPS59138477A (en) | 1983-01-27 | 1983-01-27 | Discriminator for condition of heating element in heat-sensitive type printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59138477A true JPS59138477A (en) | 1984-08-08 |
| JPH0373473B2 JPH0373473B2 (en) | 1991-11-21 |
Family
ID=11804952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58012426A Granted JPS59138477A (en) | 1983-01-27 | 1983-01-27 | Discriminator for condition of heating element in heat-sensitive type printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59138477A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092875A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS6092876A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS6169482A (en) * | 1984-08-14 | 1986-04-10 | エヌ・シー・アール・カナダ・リミテッド―エヌ・シー・アール・カナダ・エル・ティー・イー・イー | Method and system of automatically detecting defective element of thermal-printing-head |
| JPS61133869A (en) * | 1984-12-05 | 1986-06-21 | Nippon Banotsuku:Kk | Disconnection detector for thermal head |
| JPS62270350A (en) * | 1986-05-19 | 1987-11-24 | Sanyo Electric Co Ltd | Dot element driver |
| JP2021046314A (en) * | 2019-09-20 | 2021-03-25 | セイコーエプソン株式会社 | Printing device and control method of printing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828391A (en) * | 1981-08-12 | 1983-02-19 | Ishida Scales Mfg Co Ltd | Check device for printing circuit of thermal printer |
-
1983
- 1983-01-27 JP JP58012426A patent/JPS59138477A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828391A (en) * | 1981-08-12 | 1983-02-19 | Ishida Scales Mfg Co Ltd | Check device for printing circuit of thermal printer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092875A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS6092876A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS6169482A (en) * | 1984-08-14 | 1986-04-10 | エヌ・シー・アール・カナダ・リミテッド―エヌ・シー・アール・カナダ・エル・ティー・イー・イー | Method and system of automatically detecting defective element of thermal-printing-head |
| JPS61133869A (en) * | 1984-12-05 | 1986-06-21 | Nippon Banotsuku:Kk | Disconnection detector for thermal head |
| JPS62270350A (en) * | 1986-05-19 | 1987-11-24 | Sanyo Electric Co Ltd | Dot element driver |
| JP2021046314A (en) * | 2019-09-20 | 2021-03-25 | セイコーエプソン株式会社 | Printing device and control method of printing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0373473B2 (en) | 1991-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0217043A1 (en) | Thermal print head heating circuit fault detection device | |
| US4769657A (en) | Fault detection device for thermal printing head heating circuits | |
| JPH0269684A (en) | Method of testing power supply wire for integrated circuit | |
| US4500893A (en) | Thermal-printing device with defective resistive heating element detection mode | |
| JPS59138477A (en) | Discriminator for condition of heating element in heat-sensitive type printer | |
| US11165914B2 (en) | Information processing apparatus and control method thereof | |
| JP4739467B2 (en) | Photoelectric conversion IC | |
| KR900007294B1 (en) | Thermal head defect detective system | |
| JPH0573157A (en) | Fault discriminating device for circuit energizing power element | |
| US6157308A (en) | Detecting hidden faults in reliable power systems | |
| US4309768A (en) | Mismatch detection circuit for duplicated logic units | |
| JPH04317365A (en) | Semiconductor ic and data processing system incorporating same | |
| JPH05104763A (en) | Dot inspection device of thermal printer | |
| JPS6092875A (en) | Thermal printer | |
| US6483335B1 (en) | Simple chip identification | |
| JP2000326535A (en) | Diagnosis circuit and diagnosis method for thermal head break and thermal printer | |
| JPS6362751A (en) | Apparatus for detecting disconnection of thermal head | |
| JPS60163072A (en) | Temperature control device of electrophotographic type printer | |
| KR100234544B1 (en) | Heater condition monitoring device for photo resist strip apparatus | |
| JP2006035743A (en) | Power supply controller | |
| JPH07115483B2 (en) | Method for detecting print defects in thermal printers | |
| JP2954049B2 (en) | Thermal head | |
| JP2502012B2 (en) | Switch status detector | |
| KR0154705B1 (en) | System hindrance diagnosis and restoration device and method thereof | |
| KR950010592Y1 (en) | Gas sensor connecting circuit |