JPH03109843U - - Google Patents

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Publication number
JPH03109843U
JPH03109843U JP2003890U JP2003890U JPH03109843U JP H03109843 U JPH03109843 U JP H03109843U JP 2003890 U JP2003890 U JP 2003890U JP 2003890 U JP2003890 U JP 2003890U JP H03109843 U JPH03109843 U JP H03109843U
Authority
JP
Japan
Prior art keywords
thermal head
comparator
reference voltage
heat signal
integrating circuit
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
Application number
JP2003890U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP2003890U priority Critical patent/JPH03109843U/ja
Publication of JPH03109843U publication Critical patent/JPH03109843U/ja
Pending legal-status Critical Current

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Description

【図面の簡単な説明】
図は本考案の一実施例を示し、第1図はサーマ
ルプリンタの印字回路の要部を示す回路図、第2
図は印字濃度制御回路の動作を示すグラフ、第3
図及び第4図は夫々他の実施例を示す印字濃度制
御回路の回路図である。 2……サーマルヘツド、9……印字濃度制御回
路、11……発熱体、16……積分回路、17…
…比較器、20……サーミスタ、A……ヒート信
号、B……積分波形、C……基準電圧、D……制
御信号、V……駆動電源電圧。

Claims (1)

    【実用新案登録請求の範囲】
  1. 積分回路と比較器とからなり、サーマルヘツド
    の駆動電源電圧と、サーミスタ等の温度補償用感
    温素子とによつて前記比較器の基準電圧を設定し
    、前記積分回路を介してヒート信号を比較器に入
    力し、ヒート信号の積分波形と基準電圧との比較
    出力によつて、サーマルヘツドの発熱体のオン/
    オフを制御するサーマルヘツドの印字濃度制御回
    路。
JP2003890U 1990-02-28 1990-02-28 Pending JPH03109843U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003890U JPH03109843U (ja) 1990-02-28 1990-02-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003890U JPH03109843U (ja) 1990-02-28 1990-02-28

Publications (1)

Publication Number Publication Date
JPH03109843U true JPH03109843U (ja) 1991-11-12

Family

ID=31523133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003890U Pending JPH03109843U (ja) 1990-02-28 1990-02-28

Country Status (1)

Country Link
JP (1) JPH03109843U (ja)

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