JPS61122847U - - Google Patents
Info
- Publication number
- JPS61122847U JPS61122847U JP484485U JP484485U JPS61122847U JP S61122847 U JPS61122847 U JP S61122847U JP 484485 U JP484485 U JP 484485U JP 484485 U JP484485 U JP 484485U JP S61122847 U JPS61122847 U JP S61122847U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- voltage
- applied pulse
- counting
- driving device
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案の原理を示すブロツク図、第２
図は本考案の第１の実施例におけるサーマルヘツ
ド駆動装置およびその周辺部分を表わしたブロツ
ク図、第３図はこの実施例におけるサーマルヘツ
ドへの印加電圧と印字のために使われる総電流と
の関係を表わした特性図、第４図は本考案の第２
の実施例におけるサーマルヘツド駆動装置および
その周辺部分を表わしたブロツク図である。
２１……サーマルヘツド、２４……カウンタ、
２７，４３……ＲＯＭ、４１……電圧検出回路。
Figure 1 is a block diagram showing the principle of the present invention, Figure 2
The figure is a block diagram showing the thermal head drive device and its surrounding parts in the first embodiment of the present invention, and FIG. 3 shows the relationship between the voltage applied to the thermal head and the total current used for printing in this embodiment. The characteristic diagram showing the relationship, Figure 4, is the second characteristic diagram of this invention.
FIG. 2 is a block diagram showing a thermal head driving device and its peripheral parts in an embodiment of the present invention. 21...Thermal head, 24...Counter,
27, 43...ROM, 41...Voltage detection circuit.
Claims (1)
される印加パルスについてその電圧を検出する電
圧検出手段と、検出された電圧に応じて前記印加
パルスの時間幅を決定する通電時間演算器とを具
備することを特徴とするサーマルヘツド駆動装置
。 ２ 電圧検出手段が、サーマルヘツドの同時に通
電される単位発熱体の数を画信号をもとに計数す
る計数手段と、この計数手段によつて計数された
値を基にサーマルヘツドにおける予想される印加
パルスの電圧を求める電圧演算手段とを具備する
ことを特徴とする実用新案登録請求の範囲第１項
記載のサーマルヘツド駆動装置。 ３ 通電時間演算器が電圧情報をアドレスとして
通電時間に関するデータを読み出すリード・オン
リ・メモリであることを特徴とする実用新案登録
請求の範囲第１項記載のサーマルヘツド駆動装置
。[Claims for Utility Model Registration] 1. Voltage detection means for detecting the voltage of an applied pulse applied to a heating element of a thermal head for recording purposes, and determining the time width of the applied pulse according to the detected voltage. What is claimed is: 1. A thermal head driving device, comprising: a current-on time calculation unit. 2. The voltage detection means includes a counting means for counting the number of unit heating elements that are simultaneously energized in the thermal head based on the image signal, and an expected value in the thermal head based on the value counted by this counting means. 2. A thermal head driving device according to claim 1, further comprising voltage calculation means for determining the voltage of the applied pulse. 3. The thermal head drive device according to claim 1, wherein the energization time calculator is a read-only memory that reads data regarding the energization time using voltage information as an address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP484485U JPS61122847U (en) | 1985-01-19 | 1985-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP484485U JPS61122847U (en) | 1985-01-19 | 1985-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61122847U true JPS61122847U (en) | 1986-08-02 |
Family
ID=30480806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP484485U Pending JPS61122847U (en) | 1985-01-19 | 1985-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61122847U (en) |
-
1985
- 1985-01-19 JP JP484485U patent/JPS61122847U/ja active Pending
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