JPH02101494A - Display driving device - Google Patents

Display driving device

Info

Publication number
JPH02101494A
JPH02101494A JP25553088A JP25553088A JPH02101494A JP H02101494 A JPH02101494 A JP H02101494A JP 25553088 A JP25553088 A JP 25553088A JP 25553088 A JP25553088 A JP 25553088A JP H02101494 A JPH02101494 A JP H02101494A
Authority
JP
Japan
Prior art keywords
signal
triangular wave
circuit
display element
display
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
JP25553088A
Other languages
Japanese (ja)
Inventor
Masayoshi Murakami
政義 村上
Masaru Matsuo
優 松尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 by NEC Corp filed Critical NEC Corp
Priority to JP25553088A priority Critical patent/JPH02101494A/en
Publication of JPH02101494A publication Critical patent/JPH02101494A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the spoiling of a display element by generating a triangular wave, which synchronizes with a detected signal, taking an AND of the triangular wave signal and the detected signal, and driving the display element by an AND output. CONSTITUTION:The triangular wave signal, which is synchronized with an inputting pulse signal, is generated by a triangular wave generating circuit 1, an AND product is derived by an AND circuit 2 by inputting the signal generated by the triangular wave generating circuit 1 and the inputting pulse signal, and the display element 4 is driven by a driver circuit 3, amplifying the output of the AND circuit 2. Therefore, by generating a display driving signal by the triangular wave synchronized with the inputting pulse signal, the driving current can be decreased when the pulse width of the pulse signal is wide. Thus the spoiling of the display element can be prevented.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は信号検出装置における表示素子の駆動に関し、
特にパルス入力信号方式による表示駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to driving a display element in a signal detection device.
In particular, the present invention relates to a display driving device using a pulse input signal method.

（従来の技術） 従来、信号検出ｋｍからのパルス入力信号で表示素子を
、駆動するように構成した表示駆動装置では、第３図に
示すようにパルス入力信号Ｓ４を単一ステーブルマルチ
バイブレータに加え、これによって表示駆動装置が感知
しうる検出信号８．を生成し、信号検出装置から表示素
子を駆動していた。(Prior Art) Conventionally, in a display driving device configured to drive a display element with a pulse input signal from a signal detection km, a pulse input signal S4 is input to a single stable multivibrator as shown in FIG. In addition, a detection signal 8. which can be sensed by the display driving device. was generated and the display element was driven from the signal detection device.

（発明か解決しようとする課題） 従来、パルス人カイｂ号方式による表示駆動装置では、
使用装置に感知されうるまで入カバルスのパルス幅を引
延ばさなくてはならない。従って、第３図のＳ４ｔ、Ｓ
４８に示すように、検出信号Ｓ、のｌパルス幅内に連続
して発生するパルス入力信号Ｓ４に対しては、個々のパ
ルスの検出ができないという欠点がある。(Problem to be solved by the invention) Conventionally, in a display drive device based on the pulse type B method,
The pulse width of the incoming pulse must be stretched until it can be sensed by the device being used. Therefore, S4t, S in Fig. 3
As shown in 48, there is a drawback that individual pulses cannot be detected for the pulse input signal S4 that occurs continuously within l pulse width of the detection signal S.

また、検出信号ＳＩｌのパルス幅を短かくして表示素子
の駆動電流を増大させた場合、入力信号のパルス幅が長
いときには表示素子を破損することがあるという欠点が
ある。Furthermore, when the drive current of the display element is increased by shortening the pulse width of the detection signal SIl, there is a drawback that the display element may be damaged if the pulse width of the input signal is long.

本発明の目的は、被検出１８号に同期した三角波を生成
し、三角阪伯号と被検出信号とのＡＮＤをとり、ＡＮＤ
出力により表示素子を駆動することにより上記欠点を除
去し、表示素子を破損することがないように構成した表
示駆動装置を提供することにある。The purpose of the present invention is to generate a triangular wave synchronized with the detected signal No. 18, AND the Misumi Sakahaku No. 18 and the detected signal, and
It is an object of the present invention to provide a display driving device which eliminates the above-mentioned drawbacks by driving a display element with an output and is configured so that the display element is not damaged.

（課題を解決するための手段） 本発明による表示駆動装置は三角波生成回路と、ＡＮＤ
回路と、ドライバ回路とを具備して構成したものである
。(Means for Solving the Problems) A display driving device according to the present invention includes a triangular wave generation circuit and an AND
It is configured to include a circuit and a driver circuit.

三角波生成回に、は、被検出信号に同期した三角波信号
を発生するためのものである。The triangular wave generation circuit is for generating a triangular wave signal synchronized with the detected signal.

ＡＮＤ回路は、三角波１８号と被検出信号とのＡＮＤ積
をとるためのものである。The AND circuit is for taking the AND product of the triangular wave No. 18 and the detected signal.

ドライバ回路は、ＡＮＤ回路の出力を増幅して表示素子
を駆動するためのものである。The driver circuit is for amplifying the output of the AND circuit and driving the display element.

（実施例） 次に、本発明について図面を参照して説明する。(Example) Next, the present invention will be explained with reference to the drawings.

第１図は、本発明による表示駆動装置の一実施例を示す
ブロック図である。第１図において、ｌは三角波生成回
路、２はＡＮＤ回路、３はドライバ、４は表示素子であ
る。FIG. 1 is a block diagram showing an embodiment of a display driving device according to the present invention. In FIG. 1, 1 is a triangular wave generation circuit, 2 is an AND circuit, 3 is a driver, and 4 is a display element.

三角波生成回路１は入力パルス信号に同期した三角波信
号を生成し、ＡＮＤ回路２は三角波生成回路１により生
成された信号と、入力パルス信号とを入力してＡＮＤ積
を求め、ドライバ回路３はＡＮＤ回路２の出力を増幅し
て表示素子４を駆動する。The triangular wave generation circuit 1 generates a triangular wave signal synchronized with the input pulse signal, the AND circuit 2 inputs the signal generated by the triangular wave generation circuit 1 and the input pulse signal to obtain an AND product, and the driver circuit 3 generates an AND product. The output of the circuit 2 is amplified to drive the display element 4.

第２図は、第１図に示す？セ示駆動装置の各部動作波形
を示す説明図である。Figure 2 is shown in Figure 1? FIG. 3 is an explanatory diagram showing operation waveforms of each part of the display drive device.

信号線１０１より入力されたパルス４６号（Ｓ、）にも
とづき、三角波生成回路１は三角波信号（ＳＸ）を生成
して信号線１０２上に出力される。Based on pulse No. 46 (S,) inputted from the signal line 101, the triangular wave generation circuit 1 generates a triangular wave signal (SX) and outputs it onto the signal line 102.

入力パルス信号（Ｓりと三角波信号（ＳりとはＡＮＤ回
路２により信号（Ｓ、）に変換され、信号線１０３上に
出力される。信号（Ｓ、）は、ドライバ回路３を介して
表示素子４を点燈させる。The input pulse signal (S) and the triangular wave signal (S) are converted into a signal (S,) by the AND circuit 2 and output on the signal line 103. The signal (S,) is displayed via the driver circuit 3. Turn on element 4.

パルス信号（８１４）が入力された場合、信号（Ｓｓａ
）は三角波となって、ドライバ回路３を通って三角波の
駆動電流が生成され、過入力が減ぜられる。When the pulse signal (814) is input, the signal (Ssa
) becomes a triangular wave, a triangular wave drive current is generated through the driver circuit 3, and excessive input is reduced.

（発明の効果） 本発明は以上説明したように、入力パルス信号に同期し
た三角波による表示駆動信号を発生させることにより、
パルス信号のパルス幅が長い場合には１継動電流を減少
させることができ、これによって表示素子の破損を防止
することができるという効果がある。(Effects of the Invention) As explained above, the present invention generates a display drive signal using a triangular wave synchronized with an input pulse signal.
When the pulse width of the pulse signal is long, the relay current can be reduced, which has the effect of preventing damage to the display element.

また、短時間内に連続して入力さ才するパルス１ム号も
検出して表示素子を点燈さぜるので、短かい幅のパルス
も感知できるという効果がある。Furthermore, since pulses input continuously within a short period of time are detected and the display element is turned on, there is an effect that pulses with a short width can also be sensed.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明による表示駆動装置の一実施例を示す
ブロック図である。 第２図は、第１図に示す表示、駆動装置の各部動作波形
を示す説明図である。 第３図は、従来技術による表示、駆動ｋｔｚにの動作波
形を示す説明図である。 １・・・三角波生成回路　２・・・ＡＮＤ回路３・・・
ドライバ回路　　４・・・表示素子１０１〜１０３・・
・信号線 ５ｌ−８５，５ｔＩ−８１４，Ｓｌ、〜Ｓ、４゜８４１
〜８４４・・・波形FIG. 1 is a block diagram showing an embodiment of a display driving device according to the present invention. FIG. 2 is an explanatory diagram showing operation waveforms of each part of the display and drive device shown in FIG. 1. FIG. 3 is an explanatory diagram showing operating waveforms for display and drive ktz according to the prior art. 1... Triangular wave generation circuit 2... AND circuit 3...
Driver circuit 4...Display elements 101-103...
・Signal line 5l-85, 5tI-814, Sl, ~S, 4°841
~844...Waveform

Claims (1)

【特許請求の範囲】[Claims] 被検出信号に同期した三角波信号を発生するための三角
波生成回路、前記三角波信号と前記被検出信号とのＡＮ
Ｄ積をとるためのＡＮＤ回路と、前記ＡＮＤ回路出力を
増幅して表示素子を駆動するためのドライバ回路とを具
備して構成したことを特徴とする表示駆動装置。a triangular wave generation circuit for generating a triangular wave signal synchronized with the detected signal; an AN between the triangular wave signal and the detected signal;
1. A display driving device comprising: an AND circuit for obtaining a D product; and a driver circuit for amplifying the output of the AND circuit and driving a display element.
JP25553088A 1988-10-11 1988-10-11 Display driving device Pending JPH02101494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25553088A JPH02101494A (en) 1988-10-11 1988-10-11 Display driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25553088A JPH02101494A (en) 1988-10-11 1988-10-11 Display driving device

Publications (1)

Publication Number Publication Date
JPH02101494A true JPH02101494A (en) 1990-04-13

Family

ID=17280014

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25553088A Pending JPH02101494A (en) 1988-10-11 1988-10-11 Display driving device

Country Status (1)

Country Link
JP (1) JPH02101494A (en)

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