JPH06106759A - Thermal head - Google Patents
Thermal headInfo
- Publication number
- JPH06106759A JPH06106759A JP25785192A JP25785192A JPH06106759A JP H06106759 A JPH06106759 A JP H06106759A JP 25785192 A JP25785192 A JP 25785192A JP 25785192 A JP25785192 A JP 25785192A JP H06106759 A JPH06106759 A JP H06106759A
- Authority
- JP
- Japan
- Prior art keywords
- current
- thermal head
- temporary storage
- section
- print data
- 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
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、サーマルヘッドに関
し、特に、電流検出部を備えたサーマルヘッドに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal head, and more particularly to a thermal head having a current detecting section.
【０００２】[0002]
【従来の技術】従来のサーマルヘッドは、印字データ信
号を入力して印字データを一時記憶する一時記憶部と、
一時記憶部の印字データを基に発熱体を発熱させるため
に発熱体に電流を流すドライバー部と、発熱体を発熱さ
せることにより感熱紙などに印字を行なう発熱部とを有
している。2. Description of the Related Art A conventional thermal head has a temporary storage section for receiving a print data signal and temporarily storing the print data,
It has a driver section for supplying a current to the heating element to heat the heating element based on the print data in the temporary storage section, and a heating section for printing on a thermal paper or the like by heating the heating element.
【０００３】サーマルヘッドに１個の印字に必要な印字
データを送出して一時記憶部に一時記憶させる。一時記
憶部の印字データを基に一定時間ドライバー部を動作さ
せることにより発熱体に電流が流れ発熱体が発熱し感熱
紙の印字媒体に印字を行なう。The print data necessary for one print is sent to the thermal head and temporarily stored in the temporary storage section. By operating the driver unit for a certain period of time based on the print data in the temporary storage unit, a current flows through the heating element and the heating element heats up, and printing is performed on the print medium of thermal paper.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来のサーマ
ルヘッドでは、サーマルヘッド自身に電流検出部を備え
ていないため、ドライバー部が正常に動作しているかど
うかを検知することができない。そのため、印字データ
がないにもかかわらずドライバー部が動作して意図しな
い印字になったり、印字データがあるにもかかわらずド
ライバー部が動作しないために印字がある部分抜けてし
まったり、印字結果を見なければサーマルヘッドの動作
確認はできないという問題点がある。In the above-mentioned conventional thermal head, since the thermal head itself does not have a current detecting section, it is impossible to detect whether or not the driver section is operating normally. For this reason, the driver section operates and prints unintentionally even if there is no print data, or the printed section is missing because the driver section does not work even though there is print data. There is a problem that the operation of the thermal head cannot be confirmed without looking at it.
【０００５】[0005]
【課題を解決するための手段】本発明のサーマルヘッド
は、印字データ信号を入力して印字データを一時記憶す
る一時記憶部と、前記一時記憶部の印字データを基に発
熱体を発熱させるために前記発熱体に電流を流すドライ
バー部と、前記発熱体を発熱させることにより印字媒体
に印字を行なう発熱部と、前記発熱体に流れた電流量を
検知する電流検出部とを具備することを特徴とする。A thermal head according to the present invention has a temporary storage section for receiving a print data signal and temporarily storing the print data, and a heating element for generating heat based on the print data in the temporary storage section. In addition, a driver section for supplying an electric current to the heating element, a heating section for printing on a print medium by heating the heating element, and a current detection section for detecting the amount of current flowing in the heating element are provided. Characterize.
【０００６】[0006]
【実施例】次に、本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【０００７】図１は本発明の一実施例のブロック図であ
る。一時記憶部１は外部から送られた印字データを一時
記憶するものであり、ドライバー部２は一時記憶部１の
印字データを基に発熱体に電流を流すものであり、発熱
部３はドライバー部２により流れた電流により発熱し感
熱紙などの印字媒体に印字を行なうものであり、電流検
出部４は発熱体に流れた電流を検知するものである。一
時記憶部１，ドライバー部２および発熱部３は個々なサ
ーマルヘッドの長さと印字密度により決まる印字画素数
と同じ個数の素子が集まってできており、電流検出部４
はサーマルヘッド１本につき１個である。FIG. 1 is a block diagram of an embodiment of the present invention. The temporary storage unit 1 temporarily stores the print data sent from the outside, the driver unit 2 supplies a current to the heating element based on the print data of the temporary storage unit 1, and the heating unit 3 the driver unit. The current flowing through 2 heats up and prints on a print medium such as a thermal paper, and the current detector 4 detects the current flowing through the heating element. The temporary storage unit 1, the driver unit 2 and the heat generating unit 3 are made up of elements of the same number as the number of print pixels determined by the length and print density of each thermal head.
Is one for each thermal head.
【０００８】電流検出部４はドライバー部２の一素子が
動作することにより発熱体の一素子に流れる電流を検出
する。The current detector 4 detects the current flowing through one element of the heating element by the operation of one element of the driver section 2.
【０００９】ドライバー部２の正常動作を確認するため
に次の２つの方法がある。There are the following two methods for confirming the normal operation of the driver section 2.
【００１０】第１の方法は、ドライバー部２を一素子ず
つ動作させるような印字データを一時記憶部１に次々と
送出してやることにより、ドライバー部２が正常な場合
は一素子ずつドライバー部２が動作することにより、電
流検出部４が電流が発熱部に流れたことを検知して、ド
ライバー部２が正常に動作していることを確認できる。
ドライバー部２が異常な場合、例えばドライバー部２の
一素子が壊れて動作しない場合は一素子ずつ動作する印
字データが送られてきてもドライバー部２が動作せず電
流が流れないので電流検出部４は電流を検知しない。し
たがって、ドライバー部２のある一素子が壊れているこ
とを知ることができる。In the first method, print data for operating the driver unit 2 one element at a time is sent to the temporary storage unit 1 one after another, so that when the driver unit 2 is normal, the driver unit 2 operates one element at a time. By operating, the current detection unit 4 can detect that a current has flown into the heat generation unit, and can confirm that the driver unit 2 is operating normally.
When the driver unit 2 is abnormal, for example, when one element of the driver unit 2 is broken and does not operate, the driver unit 2 does not operate and current does not flow even if print data that operates one element at a time is sent. 4 does not detect current. Therefore, it can be known that one element of the driver unit 2 is broken.
【００１１】第２の方法はドライバー部２の全素子を動
作させない印字データを一時記憶部１に送出してやるこ
とにより、ドライバー部２が正常な場合はドライバー部
２のすべての素子は動作しないことにより電流検出部４
は電流が流れたことを検知しないのでドライバー部２が
動作しないことを確認できる。The second method is to send print data to the temporary storage unit 1 that does not operate all the elements of the driver unit 2, so that when the driver unit 2 is normal, all the elements of the driver unit 2 do not operate. Current detector 4
Can detect that the driver unit 2 does not operate because it does not detect that a current flows.
【００１２】ドライバー部２が異常な場合、例えば印字
データがないにもかかわらずドライバー部２が常に動作
している状態では電流検出部４が電流が流れたことを検
知してドライバー部２のある素子が常に動作中であると
いう故障を確認することができる。When the driver unit 2 is abnormal, for example, when there is no print data and the driver unit 2 is always operating, the current detecting unit 4 detects that a current flows and the driver unit 2 is present. It is possible to confirm a failure that the device is always operating.
【００１３】[0013]
【発明の効果】以上説明したように、本発明は、サーマ
ルヘッドに電流検出部を設けたので、印字結果を見ずに
サーマルヘッドの故障の有無を確認することができると
いう効果を奏する。As described above, according to the present invention, since the thermal head is provided with the current detecting portion, it is possible to confirm the presence or absence of a failure of the thermal head without looking at the printing result.
【図１】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
１ 一時記憶部 ２ ドライバー部 ３ 発熱部 ４ 電流検出部 1 Temporary storage part 2 Driver part 3 Heating part 4 Current detection part
Claims (1)
一時記憶する一時記憶部と、前記一時記憶部の印字デー
タを基に発熱体を発熱させるために前記発熱体に電流を
流すドライバー部と、前記発熱体を発熱させることによ
り印字媒体に印字を行なう発熱部と、前記発熱体に流れ
た電流量を検知する電流検出部とを具備することを特徴
とするサーマルヘッド。1. A temporary storage section for inputting a print data signal to temporarily store the print data, and a driver section for supplying a current to the heating element to heat the heating element based on the print data in the temporary storage section. A thermal head, comprising: a heat generating section that prints on a print medium by causing the heat generating element to generate heat; and a current detecting section that detects the amount of current flowing through the heat generating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25785192A JPH06106759A (en) | 1992-09-28 | 1992-09-28 | Thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25785192A JPH06106759A (en) | 1992-09-28 | 1992-09-28 | Thermal head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06106759A true JPH06106759A (en) | 1994-04-19 |
Family
ID=17312044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25785192A Pending JPH06106759A (en) | 1992-09-28 | 1992-09-28 | Thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06106759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951175A (en) * | 1998-03-05 | 1999-09-14 | Nec Corporation | Thermal printer |
-
1992
- 1992-09-28 JP JP25785192A patent/JPH06106759A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951175A (en) * | 1998-03-05 | 1999-09-14 | Nec Corporation | Thermal printer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19981208 |