JPS6334167A - Thermal printer - Google Patents
Thermal printerInfo
- Publication number
- JPS6334167A JPS6334167A JP61178572A JP17857286A JPS6334167A JP S6334167 A JPS6334167 A JP S6334167A JP 61178572 A JP61178572 A JP 61178572A JP 17857286 A JP17857286 A JP 17857286A JP S6334167 A JPS6334167 A JP S6334167A
- Authority
- JP
- Japan
- Prior art keywords
- resistors
- heating element
- heating
- control
- image signal
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000010586 diagram Methods 0.000 description 4
- 238000007651 thermal printing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method 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
- B41J2/355—Control circuits for heating-element selection
- B41J2/36—Print density control
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、感熱プリンタの熱印字用発熱抵抗体の駆動制
御回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive control circuit for a heating resistor for thermal printing in a thermal printer.
本発明は、印字の濃度を制御する感熱プリンタにおいて
、
この発熱抵抗体に接続されたインピーダンス値を変化さ
せて印字ヘッドの発熱抵抗体に供給する電力を制御する
ことにより、
印字濃度の中間調制御を高速に行うことができるように
したものである。The present invention provides halftone control of print density in a thermal printer that controls print density by changing the impedance value connected to the heat generating resistor and controlling the power supplied to the heat generating resistor of the print head. This allows the process to be performed at high speed.
従来の発熱抵抗体駆動側ｍ回路は第３図に示すように一
個の駆動トランジスタＱ、で構成されている。記録濃度
はこの駆動トランジスタＱ、の制御端子Ｂ１のオン時間
で制御していた。A conventional heating resistor driving side m-circuit is composed of one driving transistor Q, as shown in FIG. The recording density was controlled by the ON time of the control terminal B1 of the drive transistor Q.
しかし、このような従来例回路では、時間制御のために
中間調に対する記録の濃度制御を高速に行い難い欠点が
あった。However, such a conventional circuit has the disadvantage that it is difficult to perform high-speed recording density control for halftones due to time control.
本発明はこのような欠点を除去するもので、中間調に対
する記録が高速に実行できる感熱式プリンタを提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention aims to eliminate these drawbacks, and aims to provide a thermal printer that can perform halftone recording at high speed.
本発明は、到来する画信号に応じて所定温度の近傍の温
度に加熱される発熱抵抗体を有する印字ヘッドと、加熱
電源からこの発熱抵抗体に供給される電力を制御する制
御手段とを備えた感熱式プリンタにおいて、上記制御手
段は、上記加熱抵抗体のひとつと上記加熱電源との間の
経路に挿入され、並列接続された複数個の抵抗体と、こ
の抵抗体のそれぞれに直列に設けられ、この抵抗体と上
記加熱電源とを所定の時間にわたり接続状態にするスイ
ッチング素子と、上記画信号に応じて、所定の個数の上
記スイッチング素子を接続状態にする設定手段とを備え
たことを特徴とする。The present invention includes a print head having a heating resistor that is heated to a temperature close to a predetermined temperature in response to an incoming image signal, and a control means that controls power supplied to the heating resistor from a heating power source. In the thermal printer, the control means is inserted into a path between one of the heating resistors and the heating power source, and includes a plurality of resistors connected in parallel, and a plurality of resistors connected in series with each of the resistors. and a switching element that connects the resistor and the heating power source for a predetermined period of time, and a setting means that connects a predetermined number of the switching elements in accordance with the image signal. Features.
発熱抵抗体に並列に接続された抵抗体はそれぞれの駆動
トランジスタで画信号に応じた個数が電源に接続され、
発熱抵抗体に印加する電力が制御される。The number of resistors connected in parallel to the heat generating resistor is connected to the power supply by each drive transistor, depending on the image signal.
Power applied to the heating resistor is controlled.
以下、本発明実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図は、本発明の第一実施例回路の構成図であり、こ
の実施例は発熱抵抗体１０に並列にＮ個の駆動トランジ
スタＱ１〜Ｑ８が接続され、さらにそれぞれの駆動トラ
ンジスタＱ１〜ＱＮにそれぞれ抵抗体Ｒ１〜ＲＮが直列
に接続される。トランジスタＱ１〜ＱＮはオン状態の制
御信号Ｂ、〜ＢＨによりスイッチングされ、このとき発
熱抵抗体を流れる電流は抵抗体Ｒ，−ＲＮの合成抵抗値
により変化する。例えばＮ＝２とすると、制御端子Ｂ１
およびＢ２の制御により四通りの電流値が生成できる。FIG. 1 is a configuration diagram of a circuit according to a first embodiment of the present invention. Resistors R1 to RN are connected in series to each of the resistors R1 to RN. The transistors Q1 to QN are switched by the control signals B and -BH in the on state, and at this time, the current flowing through the heating resistor changes depending on the combined resistance value of the resistors R and -RN. For example, if N=2, control terminal B1
By controlling B2 and B2, four current values can be generated.
この制御により記録濃度のパターンが四通りできる。こ
こで、オン状態の制御信号Ｂ、〜ＢＨの組合せは設定回
路３０に入力される画信号Ａに基づいて決定される。Through this control, four patterns of recording density can be created. Here, the combination of on-state control signals B, -BH is determined based on the image signal A input to the setting circuit 30.
第２図は発熱抵抗体をＭ個並べた印字発熱抵抗体列によ
る第二実施例の構成を示す。発熱抵抗体１０−１〜１０
−Ｍにそれぞれ駆動制御回路２０〜１〜２０−Ｍが接続
されている。この駆動制御回路２０−１〜２０−Ｍの各
々は第１図の駆動トランジスタＱ１〜ＱＮおよび抵抗体
Ｒ３〜ＲＮを備えた駆動制御回路である。FIG. 2 shows the configuration of a second embodiment using a printed heating resistor array in which M heating resistors are arranged. Heat generating resistor 10-1 to 10
-M are connected to drive control circuits 20-1-20-M, respectively. Each of drive control circuits 20-1 to 20-M is a drive control circuit including drive transistors Q1 to QN and resistors R3 to RN shown in FIG.
本発明は、以上説明したように、即時に熱印字用発熱抵
抗体への供給電流を調整することができるので、中間調
制御を高速に行うことができる効果がある。As described above, the present invention has the advantage that the current supplied to the heat generating resistor for thermal printing can be adjusted immediately, so that halftone control can be performed at high speed.
第１図は本発明の第一実施例回路の構成を示す接続図。
第２図は本発明の第二実施例の構成を示すブロック構成
図。
第３図は従来例回路の構成を示す接続図。
１０、．１０−１〜１０−Ｍ・・・発熱抵抗体、２０．
２０−１〜２０−Ｍ・・・駆動制御回路、３０・・・設
定回路、Ｑ、Ｑ、〜Ｑ。
・・・駆動トランジスタ、Ｒｌ−ＲＮ・・・抵抗体。FIG. 1 is a connection diagram showing the configuration of a circuit according to a first embodiment of the present invention. FIG. 2 is a block configuration diagram showing the configuration of a second embodiment of the present invention. FIG. 3 is a connection diagram showing the configuration of a conventional circuit. 10,. 10-1 to 10-M...heating resistor, 20.
20-1 to 20-M... Drive control circuit, 30... Setting circuit, Q, Q, ~Q. ...Drive transistor, Rl-RN...Resistor.
Claims (1)
加熱される発熱抵抗体を有する印字ヘッドと、加熱電源
からこの発熱抵抗体に供給される電力を制御する制御手
段と を備えた感熱式プリンタにおいて、 上記制御手段は、 上記加熱抵抗体のひとつと上記加熱電源との間の経路に
挿入され、並列接続された複数個の抵抗体（Ｒ＿Ｉ〜Ｒ
＿Ｎ）と、 この抵抗体のそれぞれに直列に設けられ、この抵抗体と
上記加熱電源とを所定の時間にわたり接続状態にするス
イッチング素子（Ｑ＿Ｉ〜Ｑ＿Ｎ）と、上記画信号に応
じて、所定の個数の上記スイッチング素子を接続状態に
する設定手段（３０）とを備えたことを特徴とする感熱
式プリンタ。(1) A print head having a heating resistor heated to a temperature close to a predetermined temperature in response to an incoming image signal, and a control means for controlling power supplied to the heating resistor from a heating power source. In the thermal printer, the control means is inserted into a path between one of the heating resistors and the heating power source, and controls a plurality of resistors (R_I to R
_N), a switching element (Q_I to Q_N) which is provided in series with each of the resistors and connects the resistor and the heating power source for a predetermined period of time; A thermal printer comprising: setting means (30) for setting a number of the switching elements to a connected state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178572A JPS6334167A (en) | 1986-07-28 | 1986-07-28 | Thermal printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178572A JPS6334167A (en) | 1986-07-28 | 1986-07-28 | Thermal printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334167A true JPS6334167A (en) | 1988-02-13 |
Family
ID=16050823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178572A Pending JPS6334167A (en) | 1986-07-28 | 1986-07-28 | Thermal printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017110447A1 (en) * | 2015-12-24 | 2017-06-29 | セイコーエプソン株式会社 | Control device for thermal head, tape printing device provided with same, and control method for thermal head |
-
1986
- 1986-07-28 JP JP61178572A patent/JPS6334167A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017110447A1 (en) * | 2015-12-24 | 2017-06-29 | セイコーエプソン株式会社 | Control device for thermal head, tape printing device provided with same, and control method for thermal head |
| CN108367572A (en) * | 2015-12-24 | 2018-08-03 | 精工爱普生株式会社 | Thermal head control device, the tape printing apparatus with the thermal head control device and thermal head control method |
| US20190030915A1 (en) * | 2015-12-24 | 2019-01-31 | Seiko Epson Corporation | Thermal head control apparatus, tape printing apparatus comprising the same, and thermal head control head |
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