JPH01112947U - - Google Patents
Info
- Publication number
- JPH01112947U JPH01112947U JP710588U JP710588U JPH01112947U JP H01112947 U JPH01112947 U JP H01112947U JP 710588 U JP710588 U JP 710588U JP 710588 U JP710588 U JP 710588U JP H01112947 U JPH01112947 U JP H01112947U
- Authority
- JP
- Japan
- Prior art keywords
- led element
- element array
- temperature
- voltage
- counter
- 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
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Dot-Matrix Printers And Others (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は第１図の温度―電圧変換回路の温度―電圧変
換特性を示す特性図、第３図は第１図の温度―電
圧変換回路の電圧―周波数変換特性を示す特性図
、第４図は従来のＬＥＤ素子アレイの駆動回路を
示す回路図である。
１―１〜１―ｎ……ＬＥＤ素子アレイ、２……
ＬＥＤ素子ドライバ部、３……ビデオ信号、４…
…クロツク１信号、５―１〜５―ｎ……シフトレ
ジスタ、６……クロツク発生器、７……クロツク
２信号、８……同期カウンタ、９……メモリ、１
０……デコーダ回路、１１―１〜１１―ｎ……チ
ツプセレクト信号、１２……温度センサ、１３…
…温度―電圧変換回路、１４……電圧―周波数変
換回路。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a characteristic diagram showing the temperature-voltage conversion characteristics of the temperature-voltage conversion circuit in Figure 1, Figure 3 is a characteristic diagram showing the voltage-frequency conversion characteristics of the temperature-voltage conversion circuit in Figure 1, and Figure 4 is a characteristic diagram showing the voltage-frequency conversion characteristics of the temperature-voltage conversion circuit in Figure 1. FIG. 2 is a circuit diagram showing a conventional driving circuit for an LED element array. 1-1 to 1-n...LED element array, 2...
LED element driver section, 3... video signal, 4...
...Clock 1 signal, 5-1 to 5-n...Shift register, 6...Clock generator, 7...Clock 2 signal, 8...Synchronization counter, 9...Memory, 1
0... Decoder circuit, 11-1 to 11-n... Chip select signal, 12... Temperature sensor, 13...
...Temperature-voltage conversion circuit, 14...Voltage-frequency conversion circuit.
Claims (1)
と、 該ＬＥＤ素子アレイを駆動するＬＥＤ素子ドラ
イバ部と、 印字情報を一時的に記憶するシフトレジスタと
、 ＬＥＤ素子発光時間を記憶するメモリと、 該メモリのアドレスを設定するカウンタと、 該カウンタの出力に従つて前記シフトレジスタ
の出力を制御する制御信号を出力するデコード回
路とを具備したＬＥＤ素子アレイの駆動回路にお
いて、 前記ＬＥＤ素子アレイの近傍に設置され、前記
ＬＥＤ素子アレイの温度を検出する温度センサと
、 該温度センサが検出した温度に相当する電圧に
変換する温度―電圧変換回路と、 該温度―電圧変換回路の出力である電圧に相当
する周波数に変換し、該周波数の信号に従つて前
記カウンタのカウント動作を制御する電圧―周波
数変換回路を設けたことを特徴とするＬＥＤ素子
アレイの駆動回路。[Claims for Utility Model Registration] An LED element array consisting of a plurality of LED elements, an LED element driver unit that drives the LED element array, a shift register that temporarily stores print information, and an LED element light emission time. In the driving circuit for an LED element array, the driving circuit includes a memory for storing information, a counter for setting an address of the memory, and a decoding circuit for outputting a control signal for controlling the output of the shift register according to the output of the counter. a temperature sensor that is installed near the LED element array and detects the temperature of the LED element array; a temperature-voltage conversion circuit that converts the temperature detected by the temperature sensor into a voltage corresponding to the temperature; 1. A drive circuit for an LED element array, comprising a voltage-frequency conversion circuit that converts a frequency corresponding to an output voltage and controls the counting operation of the counter according to a signal of the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP710588U JPH01112947U (en) | 1988-01-25 | 1988-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP710588U JPH01112947U (en) | 1988-01-25 | 1988-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01112947U true JPH01112947U (en) | 1989-07-28 |
Family
ID=31211841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP710588U Pending JPH01112947U (en) | 1988-01-25 | 1988-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01112947U (en) |
-
1988
- 1988-01-25 JP JP710588U patent/JPH01112947U/ja active Pending
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