JPH05124242A - Ic for driving thermal head - Google Patents
Ic for driving thermal headInfo
- Publication number
- JPH05124242A JPH05124242A JP28809591A JP28809591A JPH05124242A JP H05124242 A JPH05124242 A JP H05124242A JP 28809591 A JP28809591 A JP 28809591A JP 28809591 A JP28809591 A JP 28809591A JP H05124242 A JPH05124242 A JP H05124242A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- thermal head
- high voltage
- low 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Electronic Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は降圧回路を有するサーマ
ルヘッド駆動用ＩＣに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal head driving IC having a step-down circuit.
【０００２】[0002]
【従来の技術】従来、図２に示すように入力回路２、ロ
ジック回路３、出力回路４に低電圧入力端子７から低電
圧を供給し、ドライバ回路１には高電圧入力端子６から
高電圧を供給する二電源形のサーマルヘッド駆動用ＩＣ
が知られていた。また、高電圧入力端子６と低電圧入力
端子７を電気的に共通にして、ドライバ回路１を低電圧
系で駆動するようにした低電圧一電源形サーマルヘッド
駆動用ＩＣが知られていた。2. Description of the Related Art Conventionally, as shown in FIG. 2, a low voltage is supplied to an input circuit 2, a logic circuit 3 and an output circuit 4 from a low voltage input terminal 7, and a driver circuit 1 is supplied with a high voltage from a high voltage input terminal 6. Dual power supply type thermal head drive IC
Was known. Further, there has been known a low voltage single power source type thermal head driving IC in which the high voltage input terminal 6 and the low voltage input terminal 7 are electrically common and the driver circuit 1 is driven by a low voltage system.
【０００３】[0003]
【発明が解決しようとする課題】従来のサーマルヘッド
駆動用ＩＣは高電圧系のドライバ回路と低電圧系の入力
回路、ロジック回路、出力回路を備えているため、サー
マルヘッド駆動用ＩＣとの外部から高電圧電源と低電圧
電源の二電源を供給する必要がある。したがってサーマ
ルヘッド駆動用ＩＣの外部に二電源を用意する必要が生
じる。Since the conventional thermal head driving IC is provided with a high-voltage driver circuit, a low-voltage input circuit, a logic circuit, and an output circuit, it is external to the thermal head driving IC. It is necessary to supply two power sources, a high voltage power source and a low voltage power source. Therefore, it is necessary to prepare two power supplies outside the thermal head driving IC.
【０００４】また、高電圧系のドライバ回路を低電圧系
で駆動させるようにしたことで、低電圧一電源で駆動で
きるようにしたサーマルヘッド駆動用ＩＣにおいては、
ドライバ回路が低電圧で駆動するため、ドライバ回路が
流そうとする電流量が高電圧で駆動するドライバ回路に
比べて小さくなるという欠点が生じる。そこで、この発
明は従来のこのような欠点を解決するため、サーマルヘ
ッド駆動用ＩＣを一電源で駆動できるようにし、しかも
低電圧一電源で駆動させた場合のようにドライバ回路が
流そうとする電流量が小さくならないサーマルヘッド駆
動用ＩＣを得ることを目的としている。Further, in the IC for driving a thermal head in which the driver circuit of the high voltage system is driven by the low voltage system so that it can be driven by the low voltage and single power source,
Since the driver circuit is driven at a low voltage, there is a drawback that the amount of current that the driver circuit tries to flow is smaller than that of a driver circuit driven at a high voltage. Therefore, in order to solve the above-mentioned drawbacks of the related art, the present invention enables the thermal head driving IC to be driven by one power supply, and further, the driver circuit tries to flow like in the case of being driven by a low voltage and one power supply. The purpose is to obtain a thermal head driving IC in which the amount of current does not decrease.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、この発明はサーマルヘッド駆動用ＩＣの構成に高電
圧から低電圧を発生させる降圧回路を加えた構成とし、
低電圧系の入力回路、ロジック回路、出力回路に前記降
圧回路から低電圧を供給するようにした。In order to solve the above problems, the present invention has a structure in which a step-down circuit for generating a low voltage from a high voltage is added to the structure of a thermal head driving IC.
A low voltage is supplied from the step-down circuit to the low-voltage input circuit, logic circuit, and output circuit.
【０００６】[0006]
【作用】上記のように構成されたサーマルヘッド駆動用
ＩＣは高電圧から低電圧をサーマルヘッド駆動用ＩＣの
内部で作り出すため、サーマルヘッド駆動用ＩＣの外部
から低電圧を供給しなくても低電圧系の入力回路、低電
圧系のロジック回路、低電圧系の出力回路は動作するこ
とができるようになる。In the thermal head driving IC constructed as described above, a low voltage is generated from a high voltage inside the thermal head driving IC. Therefore, even if the low voltage is not supplied from outside the thermal head driving IC, a low voltage is supplied. The voltage system input circuit, the low voltage system logic circuit, and the low voltage system output circuit can operate.
【０００７】高電圧系のドライバ回路はサーマルヘッド
駆動回路の外部から供給される高電圧を使用して動作さ
せることができる。したがって、サーマルヘッド駆動用
ＩＣは高電圧を供給するだけで動作することが可能とな
り、高電圧一電源形のサーマルヘッド駆動用ＩＣが実現
するのである。しかもドライバ回路は高電圧で駆動する
ため、ドライバ回路が流そうとする電流が低電圧で駆動
した場合のように減少することはなくなるのである。The high-voltage driver circuit can be operated by using a high voltage supplied from the outside of the thermal head drive circuit. Therefore, the thermal head driving IC can be operated only by supplying a high voltage, and a high voltage single power source type thermal head driving IC is realized. Moreover, since the driver circuit is driven at a high voltage, the current that the driver circuit tries to flow does not decrease unlike when it is driven at a low voltage.
【０００８】[0008]
【実施例】以下に、この発明の実施例を図に基づいて説
明する。図１において、高電圧入力端子６から入力され
た高電圧は、ドライバ回路１と降圧回路５に入力され
る。ドライバ回路１は高電圧で動作することが可能とな
る。ドライバ回路１を例えばＣ−ＭＯＳトランジスタで
構成した場合、Ｃ−ＭＯＳトランジスタのゲートに供給
できる電圧が高電圧になる。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the high voltage input from the high voltage input terminal 6 is input to the driver circuit 1 and the step-down circuit 5. The driver circuit 1 can operate at a high voltage. When the driver circuit 1 is composed of, for example, a C-MOS transistor, the voltage that can be supplied to the gate of the C-MOS transistor becomes a high voltage.
【０００９】Ｃ−ＭＯＳトランジスタはゲートに供給さ
れる電圧が高いほど流せる電流は多くなる特性を持つた
め、Ｃ−ＭＯＳトランジスタの流せる電流を多くするこ
とが可能となる。降圧回路５は入力された高電圧を利用
して、低電圧を発生させる。例えば、高電圧とＧＮＤの
間に直列に抵抗を接続する。高電圧からＧＮＤにかけて
抵抗値の途中のポイントは高電圧よりも低くなる。抵抗
値の途中のポイントを適当に選ぶことによって希望する
低電圧を得ることが出来る。Since the C-MOS transistor has a characteristic that a larger current can flow as the voltage supplied to the gate is higher, it is possible to increase the current that the C-MOS transistor can flow. The step-down circuit 5 uses the input high voltage to generate a low voltage. For example, a resistor is connected in series between the high voltage and GND. The point in the middle of the resistance value from the high voltage to the GND becomes lower than the high voltage. A desired low voltage can be obtained by appropriately selecting a point in the middle of the resistance value.
【００１０】このようにして降圧回路５から得られた低
電圧を入力回路２、ロジック回路３、出力回路４に供給
することで、これらの回路は動作が可能となる。以上の
ような実施例において、高電圧入力端子から入力される
高電圧のみでサーマルヘッド駆動用ＩＣは動作すること
が可能となり、高電圧一電源形のサーマルヘッド駆動用
ＩＣが実現するのである。By supplying the low voltage thus obtained from the step-down circuit 5 to the input circuit 2, the logic circuit 3, and the output circuit 4, these circuits can operate. In the above-described embodiment, the thermal head driving IC can operate only with the high voltage input from the high voltage input terminal, and the high voltage single power supply type thermal head driving IC is realized.
【００１１】[0011]
【発明の効果】この発明は、以上説明したようにサーマ
ルヘッド駆動用ＩＣにおいて、高電圧から低電圧を発生
させる降圧回路を設けることにより、一電源でサーマル
ヘッド駆動用ＩＣを動作させることができるようにな
る。As described above, according to the present invention, the thermal head driving IC can be operated by one power source by providing the step-down circuit for generating the high voltage to the low voltage in the thermal head driving IC. Like
【図１】この発明のサーマルヘッド駆動用ＩＣの構成図
である。FIG. 1 is a configuration diagram of a thermal head driving IC of the present invention.
【図２】従来のサーマルヘッド駆動用ＩＣの構成図であ
る。FIG. 2 is a configuration diagram of a conventional thermal head driving IC.
【符号の説明】 １ ドライバ回路 ２ 入力回路 ３ ロジック回路 ４ 出力回路 ５ 降圧回路 ６ 高電圧入力端子 ７ 低電圧入力端子 ９ ＧＮＤ[Description of symbols] 1 driver circuit 2 input circuit 3 logic circuit 4 output circuit 5 step-down circuit 6 high-voltage input terminal 7 low-voltage input terminal 9 GND
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮野入 純 東京都江東区亀戸６丁目31番１号 セイコ ー電子工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Miyano Jun 31-1 Kameido, Koto-ku, Tokyo Seiko Electronics Co., Ltd.
Claims (1)
低電圧系のロジック回路と、前記ロジック回路の出力に
接続された低電圧系の出力回路と、前記ロジック回路の
出力に接続された高電圧系のドライバ回路と、前記ドラ
イバ回路に接続された高電圧入力端子とを備えたサーマ
ルヘッド駆動用ＩＣにおいて、高電圧入力端子から高電
圧を供給される降圧回路を設け、前記降圧回路から低電
圧を発生させ、前記入力回路と前記ロジック回路及び前
記出力回路に低電圧を供給することを特徴とするサーマ
ルヘッド駆動用ＩＣ。1. A low-voltage logic circuit connected to the output of a low-voltage input circuit, a low-voltage output circuit connected to the output of the logic circuit, and a low-voltage output circuit connected to the output of the logic circuit. In a thermal head driving IC including a high-voltage driver circuit and a high-voltage input terminal connected to the driver circuit, a step-down circuit supplied with a high voltage from the high-voltage input terminal is provided. A thermal head driving IC, characterized in that a low voltage is generated from the input circuit, the low voltage is supplied to the input circuit, the logic circuit, and the output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28809591A JP2909786B2 (en) | 1991-11-01 | 1991-11-01 | Thermal head drive IC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28809591A JP2909786B2 (en) | 1991-11-01 | 1991-11-01 | Thermal head drive IC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05124242A true JPH05124242A (en) | 1993-05-21 |
| JP2909786B2 JP2909786B2 (en) | 1999-06-23 |
Family
ID=17725731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28809591A Expired - Lifetime JP2909786B2 (en) | 1991-11-01 | 1991-11-01 | Thermal head drive IC |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909786B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3072448U (en) * | 2000-03-03 | 2000-10-20 | 株式会社ハマイ | Valve with fuel gauge and protective cover for fuel gauge |
-
1991
- 1991-11-01 JP JP28809591A patent/JP2909786B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3072448U (en) * | 2000-03-03 | 2000-10-20 | 株式会社ハマイ | Valve with fuel gauge and protective cover for fuel gauge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2909786B2 (en) | 1999-06-23 |
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