JPS60177395A - Information display unit - Google Patents

Information display unit

Info

Publication number
JPS60177395A
JPS60177395A JP3261384A JP3261384A JPS60177395A JP S60177395 A JPS60177395 A JP S60177395A JP 3261384 A JP3261384 A JP 3261384A JP 3261384 A JP3261384 A JP 3261384A JP S60177395 A JPS60177395 A JP S60177395A
Authority
JP
Japan
Prior art keywords
light emitting
terminal
output
light
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.)
Granted
Application number
JP3261384A
Other languages
Japanese (ja)
Other versions
JPH0723987B2 (en
Inventor
津澤　正巳
富永　宗春
南雲　清三郎
満 酒井
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.)
JAPAN TRAFFIC MANAGE TECH ASS
Original Assignee
JAPAN TRAFFIC MANAGE TECH ASS
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 JAPAN TRAFFIC MANAGE TECH ASS filed Critical JAPAN TRAFFIC MANAGE TECH ASS
Priority to JP59032613A priority Critical patent/JPH0723987B2/en
Priority to EP19850901065 priority patent/EP0180642A4/en
Priority to PCT/JP1985/000070 priority patent/WO1985003795A1/en
Publication of JPS60177395A publication Critical patent/JPS60177395A/en
Priority to KR8570258A priority patent/KR890005189B1/en
Publication of JPH0723987B2 publication Critical patent/JPH0723987B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Abstract

A number of pairs of, e.g., yellow (19) and red (2) LEDs arranged in a conventional pattern are selectively actuated to define a character display, etc. The LEDs in each pair are respectively drivable by a DC source (21) via circuits including NO switches (15,16) that are closed when respective transistors (13,14) conduct. The conduction timing of one transistor (13) is controlled by output from an ambient light sensor (2) supplied via a voltage control oscillator (4) and a monomultivibrator (6). The other transistor (14) is controlled by output of an AND gate (11) receiving one input for the monomultivibrator (6) and one input from a detector (8) which produces output only when the light sensor (2) output is above a set level.

Description

【発明の詳細な説明】 この発明は、表示素子に発光ダイオードを用いた情報表
示装置に係り、特に周囲の明るさに応じて発光ダイオー
ドの点灯数や種類及び発光光度を増減調整して視認性を
高めた情報表示装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information display device using light emitting diodes as display elements, and in particular, increases or decreases the number and types of light emitting diodes lit and the luminous intensity of light emitted from the light emitting diodes depending on the surrounding brightness to improve visibility. This invention relates to an information display device with improved performance.

表示素子に発光ダイオードを用い、これを複数門並べて
点綴シで文字や図形、図柄等を一表示させる情報表示装
置においては、発光ダイオードの発光光度によって表示
された情報内容の視認性等の表示精度が左右されること
が多い。例えば昼間、発光ダイオードの周囲が明るい状
態においては、発光ダイオードの発光光度を高くしなけ
れば視認性が悪く、逆に夜間、発光ダイオードの周囲が
暗い状態においては、発光ダイオードの発光光度が高９
と、表示された文字や図形、図柄等がハレーションを起
こして文字や図形、図柄等の判別が困難となるためその
発光。In information display devices that use light emitting diodes as display elements and display letters, figures, designs, etc. in a dotted manner by arranging multiple light emitting diodes, the visibility of the information content displayed is determined by the luminous intensity of the light emitting diodes. Accuracy is often affected. For example, during the daytime, when the area around the light-emitting diode is bright, visibility will be poor unless the light intensity of the light-emitting diode is increased; conversely, at night, when the area around the light-emitting diode is dark, the light intensity of the light-emitting diode will be high.
Then, the displayed characters, figures, designs, etc. cause halation, making it difficult to distinguish the characters, figures, designs, etc., so the light emitted.

光度を下げる必要がある。また発光ダイオードの発光色
によっても判別の度合が異なり、同じ発光光度であって
も夜間においては赤色が判別しにくく、緑色や黄色のほ
うが判別し易い。しかし逆に昼間においては赤色のほう
が判別し易い。而して発光素子に発光ダイオードを用い
た情報表示装置においては、その視認性や判別性を高め
るために発光ダイオードの発光光度を調整し、周囲の明
るさに同期させる必要がある。It is necessary to reduce the brightness. The degree of discrimination also differs depending on the color of the light emitted by the light emitting diode; even if the luminance is the same, red is difficult to distinguish at night, while green and yellow are easier to distinguish. However, in the daytime, red is easier to distinguish. In an information display device using a light emitting diode as a light emitting element, it is necessary to adjust the luminous intensity of the light emitting diode and synchronize it with the surrounding brightness in order to improve its visibility and distinguishability.

一般に発光ダイオードの発光光度は、流れる電流に比例
するという性質がある。どの性質を利用して発光ダイオ
ードに印加する電源電圧を変化させ、発光ダイオードに
流れる電流を調整してその発光色を変化させる方法が提
案されている。しかし発光ダイオードで降下する電圧は
、構成物質の違いにより発光色の異なる発光ダイオード
ごとに異なっており、特に発光色の異なる発光ダイオー
ドを複数個ずつ並べて発光させ、その混合色によって情
報を表示させるように構成した情報表示装置においては
、発光ダイオードに印加する電源電圧を変化させると種
類の異なる発光ダイオードに流れる電流の差異により発
光ダイオード間の発光光度に大きな差を発生させるとい
う問題がある。また発光ダイオードに印加する電源電圧
を周囲の明るさに同期させて自動的に上下させるよう構
成することも可能である。しかし多数の発光ダイオード
を実装させる情報表示装置におしては大きな容量が必要
となり、装置が大型で高価なものとなるばかりでなく、
複雑な構造となって信頼性を低下させる欠点がある。Generally, the luminous intensity of a light emitting diode is proportional to the flowing current. A method has been proposed in which the power supply voltage applied to the light-emitting diode is changed by utilizing this property, and the current flowing through the light-emitting diode is adjusted to change the color of the light emitted from the light-emitting diode. However, the voltage dropped by a light emitting diode differs depending on the light emitting diode, which emit light in different colors due to differences in the constituent materials. In the information display device configured as above, there is a problem in that when the power supply voltage applied to the light emitting diodes is changed, the difference in the current flowing through the different types of light emitting diodes causes a large difference in the luminous intensity between the light emitting diodes. It is also possible to configure the power supply voltage applied to the light emitting diode to be automatically raised and lowered in synchronization with the surrounding brightness. However, an information display device that mounts a large number of light emitting diodes requires a large capacity, which not only makes the device large and expensive;
It has the disadvantage of becoming a complicated structure and reducing reliability.

この発明は、上記の欠点を解決したものであり、発光ダ
イオードに印加する′電源電圧を変化させることなく、
その発光光度を周囲の明るさに同期して上下させ、視認
性と判別性を高めた情報表示装置を提供することを目的
としている。This invention solves the above-mentioned drawbacks, and without changing the power supply voltage applied to the light emitting diode.
The object of the present invention is to provide an information display device whose luminous intensity is raised and lowered in synchronization with the surrounding brightness to improve visibility and discrimination.

以下図面に従ってこの発明の実施態様を説明する。Embodiments of the present invention will be described below with reference to the drawings.

第１図は、この発明に係る情報表示装置の一実例を示す
回路図であり、１は発光ダイオードの周囲を情報表示装
置の外部から照射する光であり、２はこの光１に照射さ
れてその光量が多−ときには電圧を高く、またその光量
が少ないときには電圧を低くして端子３側に出力する光
電変換回路であシ、硫化カドミウム、フォトトランジス
タ等を用した電気回路により構成されている。この光電
変換回路２に電圧制御発振器４とレベル検定回路８を接
続し、光電変換回路２の端子３から出力される信号が同
時に両者に入力するように構成する。レベル検定回路８
はゼナーダイオード等で構成されており、入力電圧が設
定レベル以上になると、その端子９側に信号を出力する
。この端子９を電圧制御発振器４の入力側の端子１０に
接続すると共に、アンド回路１１の一方の入力端に接続
し、端子９から出力された信号が電圧制御発振器４とア
ンド回路１１１Ｃ同時に入力されるようになっている。FIG. 1 is a circuit diagram showing an example of an information display device according to the present invention, in which 1 is light that irradiates the area around a light emitting diode from outside the information display device, and 2 is a light that is irradiated with this light 1. It is a photoelectric conversion circuit that outputs a high voltage when the amount of light is large, and a low voltage when the amount of light is small and outputs it to the terminal 3 side.It is composed of an electric circuit using cadmium sulfide, a phototransistor, etc. . A voltage controlled oscillator 4 and a level verification circuit 8 are connected to the photoelectric conversion circuit 2, so that the signal output from the terminal 3 of the photoelectric conversion circuit 2 is input to both simultaneously. Level test circuit 8
is composed of a Zener diode or the like, and outputs a signal to its terminal 9 side when the input voltage exceeds a set level. This terminal 9 is connected to the input side terminal 10 of the voltage controlled oscillator 4 and also connected to one input terminal of the AND circuit 11, so that the signal output from the terminal 9 is simultaneously input to the voltage controlled oscillator 4 and the AND circuit 111C. It has become so.

またアンド回路１１の他方の入力端には、モノマルチ６
を接続し、その端子７から出力される信号が入力される
ようになっている。モノマルチ６は、電圧制御発振器４
に接続されており、電圧制御発振器４の端子５から出力
される信号の立上りでその端子７側へ１時間のパルス信
号を出力するものである。即ち、光電変換回路２の端子
３に発生する′屯田の変化により電圧制御発振器４の端
子５から出力する発振周波数が変化し、その信号を受け
てモノマルチ６の端子７に１時間のパルスが出力される
ことから、入力電圧にょ９出力時間比が変化するパルス
発振回路を構成している。このパルス発振回路に発光ダ
イオードの駆動回路を接続する。この実施例において、
発光ダイオードの駆動回路としてトランジスタが用いら
れており、モノマルチ６の端子７に対し、一方は直接的
に、また他方はアンド回路１１を介して間接的にトラ／
：）スタ１３，１４を接続し、モノマルチ６の端子７か
ら出力されるパルス信号が夫々のベースに出力されてい
る間コレクタとエミッタを導通させ得るように構成し、
かつ−力のトランジスタ１３にはスイッチ１５と抵抗１
７全介して複数個の例えば黄色発光ダイオード１９を接
続し、また他方のトランジスタ１４にはスイッチ１６と
抵抗１８を介して複数個の例えば赤色発光ダイオード２
０を接続し、更に夫々の発光ダイオード１９　、２（ｌ
直流電源２１に接続して回路を構成する。而してスイッ
チ１５が接であれば直流電源から供給された電力は、発
光ダイオード１９のアノードからカソードを通り、抵抗
１７、スイッチ１５を経由してトランジスタ１３に流れ
、そのコレクタとエミッタを辿って直流電源２１に流れ
、発光ダイオード１９を／ξルス駆動してこれを点灯さ
せ、この実施例においては黄色発光させる。またレベル
検定回路８の端子９から信号が出力し、かつモノマルチ
６の端子７からパルス信号が出力されていると、アンド
回路１１はその端子１２側へパルス信号を出力し、その
信号がトランジスタ１４のベースに入力し、トラ／：）
スタ１４は、そのベースに信号が入力している間コレク
タとエミッタを導通させる。このときスイッチ１６が接
であれば直流電源２１から供給された′電力は、発光ダ
イオード２０のアノードからカソードを通り、抵抗１８
、スイッチ１６を経由してトランジスタ１４に流れ、そ
のコレクタとエミッタを通って直流電源２１に流れ、発
光ダイオード２０をパルス駆動してこれを点灯させ、こ
の実施例においては赤色発光させる。即ちトランジスタ
１３と１４は、発光色の異なる発光ダイオード１９と２
０１に各別に駆動する駆動回路を構成している。Furthermore, the other input terminal of the AND circuit 11 is connected to a mono multi-6
is connected, and the signal output from the terminal 7 is input. Monomulti 6 is voltage controlled oscillator 4
The voltage controlled oscillator 4 outputs a one-hour pulse signal to its terminal 7 side at the rising edge of the signal output from its terminal 5. That is, the oscillation frequency output from the terminal 5 of the voltage controlled oscillator 4 changes due to the change in the voltage generated at the terminal 3 of the photoelectric conversion circuit 2, and in response to this signal, a one-hour pulse is sent to the terminal 7 of the monomulti 6. Since it is output, it constitutes a pulse oscillation circuit in which the output time ratio changes depending on the input voltage. A light emitting diode drive circuit is connected to this pulse oscillation circuit. In this example,
Transistors are used as a drive circuit for the light emitting diode, and one transistor is connected directly to the terminal 7 of the monomulti 6, and the other is connected indirectly to the terminal 7 of the monomulti 6 through the AND circuit 11.
:) The stars 13 and 14 are connected, and the collector and emitter are configured to be electrically connected while the pulse signal output from the terminal 7 of the monomulti 6 is output to the respective bases,
And - the power transistor 13 has a switch 15 and a resistor 1.
A plurality of, for example, yellow light emitting diodes 19 are connected to the other transistor 14 through a switch 16 and a resistor 18.
0 and further connect the respective light emitting diodes 19 and 2(l
It is connected to the DC power supply 21 to form a circuit. If the switch 15 is connected, the power supplied from the DC power source passes through the anode and cathode of the light emitting diode 19, passes through the resistor 17 and the switch 15, and flows to the transistor 13, following its collector and emitter. The current flows through the DC power supply 21 and drives the light emitting diode 19 with /ξ pulses to turn it on, and in this embodiment, it emits yellow light. Further, when a signal is output from terminal 9 of level verification circuit 8 and a pulse signal is output from terminal 7 of monomulti 6, AND circuit 11 outputs a pulse signal to its terminal 12 side, and the signal is transmitted to transistor Enter the base of 14, Tora/:)
The collector and emitter of the star 14 are electrically connected while a signal is input to its base. At this time, if the switch 16 is connected, the power supplied from the DC power supply 21 passes from the anode to the cathode of the light emitting diode 20, and the resistor 18
, passes through the switch 16 to the transistor 14, passes through its collector and emitter to the DC power supply 21, and pulses the light-emitting diode 20, causing it to light up, in this embodiment red light. That is, the transistors 13 and 14 are connected to the light emitting diodes 19 and 2 that emit light of different colors.
01 is configured with a drive circuit that drives each separately.

第２図は上記実施例におけるタイミングチャートを示す
ものである。以下この図により各回路の電圧及び出力波
形の状態を周囲の光量が少な一場合（７）、光量が少し
多い場合（イ）、光量が多い場合（つ）、光量が非常に
多い場合に）の４つの場合に分けて説明する。FIG. 2 shows a timing chart in the above embodiment. The following diagram shows the voltage and output waveform states of each circuit when the amount of ambient light is low (7), when the amount of light is a little high (A), when the amount of light is high (T), and when the amount of light is very high) The explanation will be divided into four cases.

９ま光１の光量が少ない場合、即ち（労の期１間にお−
では、光電変換回路２の端子３に出力する電圧が低く、
したがって電圧制御発振器４の端子５の出力周波数が低
く、かつレベル検定回路８の端子９には出力が無いため
モノマルチ６の端子７から出力されるパルス信号は、パ
ルス出力時間比が小さく、トランジスタ１３のベースに
入力して発光ダイオード１９だけを駆動する。9. If the light intensity of light 1 is low, that is, (during labor period 1)
In this case, the voltage output to terminal 3 of photoelectric conversion circuit 2 is low,
Therefore, since the output frequency of the terminal 5 of the voltage controlled oscillator 4 is low and there is no output at the terminal 9 of the level verification circuit 8, the pulse signal output from the terminal 7 of the monomulti 6 has a small pulse output time ratio and the transistor 13 to drive only the light emitting diode 19.

このとき発光ダイオード１９は、その点灯している時間
比が小さいため周囲の明るさに同調して暗く点灯する。At this time, the light emitting diode 19 lights up dimly in synchronization with the surrounding brightness because the lighting time ratio is small.

次に光１の光量が少し多い場合、即ち（用の期間におり
ては、光電変換回路２の端子３に出力する電圧が少し高
くなり、これに応じて電圧制御発振器４の端子５の出力
周波数が高くなる。しかしレベル検定回路８が動作しな
いためその端子９からの出力は無い。したがってモノマ
ルチ６の端子７から出力されるパルス信号は、パルス出
力時間比が大きく、トランジスタ１３のベースに入力し
て発光ダイオード１９だけを駆動する。このとき発光ダ
イオード１９は、その点灯している時間比が太きいため
周囲の明るさに同調して明るく点灯する。更に光１の光
量が多い場合、即ち（り）の期間においては、光電変換
回路２の端子３に出力する電圧が高く、またレベル検定
回路８が動作し、その端子９に信号が出力されるため電
圧制御発振器４の端子５の出力周波数は低く、モノマル
チ６の端子７とアンド回路１１の端子１２から出力され
るノソルス信号は／ξルス出力時間比が小さい。したが
ってモノマルチ６の端子７から出力される／ξルス信号
はトラ／：）ス、ｆ１３のベースに、またアンド回路１
１の端子１２から出力されるパルス信号はトランジスタ
１４０ベースに夫々入力し、発光ダイオード１９と２０
を駆動する。このとき発光ダイオード１９と２０は、そ
の点灯している時間比は小さいが、発光ダイオード１９
．２０の点灯数が増加し、また周囲の明るさに対応した
視認性の高い、この実施例においては赤色発光ダイオー
ド２０が点灯し、黄色と赤色の光が混合され、周囲の明
るさに同調して明るく点灯し、かつ視認性を高くする。Next, when the amount of light 1 is a little large, that is, during the period of The frequency increases.However, since the level verification circuit 8 does not operate, there is no output from its terminal 9.Therefore, the pulse signal output from the terminal 7 of the monomulti 6 has a large pulse output time ratio, and is connected to the base of the transistor 13. input and drive only the light emitting diode 19.At this time, the light emitting diode 19 lights up brightly in synchronization with the surrounding brightness because the lighting time ratio is large.Furthermore, if the amount of light 1 is large, That is, during the period (ri), the voltage output to the terminal 3 of the photoelectric conversion circuit 2 is high, and the level verification circuit 8 operates and a signal is output to its terminal 9, so that the voltage at the terminal 5 of the voltage controlled oscillator 4 is high. The output frequency is low, and the /ξ russ signal output from terminal 7 of the monomulti 6 and the terminal 12 of the AND circuit 11 has a small /ξ russ output time ratio.Therefore, the /ξ russ signal output from the terminal 7 of the mono multi 6 is Toras/:)s, on the base of f13, and AND circuit 1
The pulse signals output from the terminals 12 of 1 are input to the bases of the transistors 140, respectively, and are connected to the light emitting diodes 19 and 20.
to drive. At this time, the light emitting diodes 19 and 20 are lit for a small time ratio, but the light emitting diode 19
．． In this example, red light emitting diodes 20 are lit, and the yellow and red lights are mixed, synchronizing with the surrounding brightness. Lights up brightly and increases visibility.

更にまた光１の光量が非常に多い場合、即ちに）の期間
においては、光電変換回路２の端子３に出力する電圧が
非常に高く、またレベル検定回路８も動作し、その端子
９に信号が出力されるため電圧制御発振器４の端子５の
出力周波数は高く、モノマルチ６の端子７とアンド回路
１１の端子１２から出力されるノξルス信号はノセルス
出力時間比が大きい。したがってモノマルチ６の端子７
から出力されるパルス信号はトラ／：）−スタ１３のベ
ースに、またアンド回路１１の端子１２から出力される
ノξルス信号はトラ／：）スタ１４のベースに夫々入力
し、発光ダイオード１９と２０を駆動する。このとき発
光ダイオード１９と２０は、その点灯している時間比が
太きいため周囲の明るさに同調して非常に明るく点灯し
、かつ視認性を高くする。Furthermore, when the amount of light 1 is very large, that is, during period ), the voltage output to terminal 3 of photoelectric conversion circuit 2 is very high, and level verification circuit 8 also operates, and a signal is output to terminal 9. is output, the output frequency of the terminal 5 of the voltage controlled oscillator 4 is high, and the nox signal output from the terminal 7 of the monomulti 6 and the terminal 12 of the AND circuit 11 has a large nox output time ratio. Therefore, terminal 7 of monomulti 6
The pulse signal outputted from the Tr/:)-star 13 is inputted to the base, and the ξ pulse signal outputted from the terminal 12 of the AND circuit 11 is inputted to the base of the Tr/:)-star 14, and the light emitting diode 19 and drive 20. At this time, the light emitting diodes 19 and 20 are lit very brightly in synchronization with the surrounding brightness because the lighting time ratio is large, and the visibility is increased.

ここで電圧制御発振器４の端子５から出力される信号の
周波数は、発光ダイオード１９．２０がモノマルチ６の
端子７から出力されるパルス信号によってパルス駆動さ
れて点灯したときに、人の視覚における残像現象により
点灯と消灯が判別できないような高い周波数に設定され
ているものである。Here, the frequency of the signal output from the terminal 5 of the voltage controlled oscillator 4 is the frequency of the signal outputted from the terminal 5 of the voltage controlled oscillator 4 when the light emitting diodes 19 and 20 are pulse-driven and turned on by the pulse signal output from the terminal 7 of the monomulti 6. The frequency is set to such a high level that it is impossible to tell whether the light is on or off due to the afterimage phenomenon.

第３図は発光ダイオードの配置例を示したもので、２２
乃至３０は、例えば黄色発光ダイオードであり、第１図
に示すトランジスタ１３のコレクタに抵抗１７及びスイ
ッチ１５を介して接続され、また３１乃至３９１′ｉ、
例えば赤色発光ダイオードであり、同じく第１図に示す
トランジスタ１４のコレクタに抵抗１８及びスイッチ１
７を介して接続されている。而して各発光ダイオード１
９．２０に接続されているスイッチ１６．１７を接と断
とに切り換えることにより所望の発光ダイオード１９．
２０’（ｉｌ”点灯させ、任意の文字や図形、図柄等の
表示を行うことができ、更に周囲の明るさに応じて発光
ダイオード１９．２０の数と種類を変化させ、その発光
光度を自動的に増減させて表示内容の視認性を高めるこ
とができる。Figure 3 shows an example of the arrangement of light emitting diodes, with 22
30 are, for example, yellow light emitting diodes, which are connected to the collector of the transistor 13 shown in FIG. 1 via a resistor 17 and a switch 15, and 31 to 391'i,
For example, it is a red light emitting diode, and a resistor 18 and a switch 1 are connected to the collector of the transistor 14 shown in FIG.
7. Therefore, each light emitting diode 1
The desired light emitting diode 19.9.20 is switched on and off by switching the switch 16.17 connected to the light emitting diode 19.
20'(il) can be turned on to display arbitrary characters, figures, designs, etc.Furthermore, the number and type of light emitting diodes 19.20 can be changed according to the surrounding brightness, and the luminous intensity can be automatically adjusted. Visibility of display contents can be improved by increasing or decreasing the display content.

なお、この実施例においては第１図に示す電圧制御発振
器４とモノマルチ６を一つのものとし、黄色と赤色の発
光ダイオードの両方を駆動し得るように構成してねるが
、これを発光ダイオードの種類ごとに設け、その出方時
間比を変化させることで混合色を変えるように構成する
こともできる。また、スイッチ１５．１６に代えトラン
ジスタ、ＳＣＲ等の半導体を用い、発光ダイオード１９
．２０の種類についても黄色、赤色以外の発光色のもの
を用い、更に一種類のみまたは複数種類の発光色を選ぶ
ことも可能である。In this embodiment, the voltage controlled oscillator 4 and the monomulti 6 shown in FIG. It is also possible to provide a configuration for each type and change the mixed color by changing the time ratio of the appearance. Also, instead of the switches 15 and 16, semiconductors such as transistors and SCRs may be used, and the light emitting diode 19
．． It is also possible to use light emitting colors other than yellow and red for the 20 types, and to select only one type or a plurality of types of light emitting colors.

この発明は、以上のように構成したから、簡単な構成で
発光ダイオードに供給する電源電圧を変化させることな
く、発光ダイオードの周囲の明るさに応じて容易にその
数と種類を増減かつ可変し、また発光ダイオードを駆動
するパルスの時間比を制御することにより発光ダイオー
ドの発光光度を自動的に周囲の明るさに同調させること
ができる。Since the present invention is configured as described above, the number and type of the light emitting diodes can be easily increased/decreased and varied according to the brightness around the light emitting diodes without changing the power supply voltage supplied to the light emitting diodes with a simple configuration. Furthermore, by controlling the time ratio of the pulses that drive the light emitting diodes, the luminous intensity of the light emitting diodes can be automatically synchronized to the surrounding brightness.

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

図面は、この発明に係る情報表示装置の実施態様を示す
ものであり、第１図は回路図、第２図はタイミングチャ
ート、第３図は発光ダイオードの配置図である。 １・・・光　２・・・光電変換回路 ３．５，７，９，１０．１２・・・端子　４・・・電圧
制御発振回路６・・・モノマルチ　８・・・レベル検定
回路１１・・・アンド回路　１３，１４・・・トランジ
スタ１９．２０・・・発光ダイオード２１・・・直流電
源特許出願人　財団法人　日本交通管理技術協会代理人
　弁理士　前　１）和　男The drawings show an embodiment of the information display device according to the present invention, and FIG. 1 is a circuit diagram, FIG. 2 is a timing chart, and FIG. 3 is a layout diagram of light emitting diodes. 1... Light 2... Photoelectric conversion circuit 3.5, 7, 9, 10.12... Terminal 4... Voltage controlled oscillation circuit 6... Monomulti 8... Level verification circuit 11. ...AND circuit 13,14...Transistor 19.20...Light emitting diode 21...DC power supply Patent applicant Japan Traffic Management Technology Association Representative Patent attorney Former 1) Kazuo

Claims (1)

【特許請求の範囲】 １、周囲の光を受けてこれを電気信号に変換する光電変
換回路と、との光電変換回路の出力信号を受け、その出
力信号に対応して・ξルス出力時間比を変化させ、パル
ス信号に出力するパルス発振回路を設け、周囲が暗いと
きは、前記パルス発振回路のパルス出力時間比を小さく
し、また周囲が明るいときけ、前記７ξルス発振回路の
パルス出力時間比を大きくして発光ダイオードを駆動し
、その発光光度を周囲の明るさに同調させ得るように構
成したことを特徴とする情報表示装置。 ２、光電変換回路の出力信号のレベルが設定レベル以上
となったときに信号を出力するレベル検定回路を併設し
、このレベル検定回路の出力信号により駆動する発光ダ
イオードの種類と数を切り換えることを特徴とする特許
請求の範囲第１項記載の情報装置。[Claims] 1. A photoelectric conversion circuit that receives ambient light and converts it into an electrical signal; A pulse oscillation circuit is provided which outputs a pulse signal by changing the 7 An information display device characterized in that a light emitting diode is driven with a large ratio, and its luminous intensity can be synchronized with surrounding brightness. 2. A level verification circuit is installed that outputs a signal when the output signal level of the photoelectric conversion circuit exceeds a set level, and the type and number of light emitting diodes to be driven can be switched by the output signal of this level verification circuit. An information device according to claim 1, characterized in that:
JP59032613A 1984-02-24 1984-02-24 Information display device Expired - Lifetime JPH0723987B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59032613A JPH0723987B2 (en) 1984-02-24 1984-02-24 Information display device
EP19850901065 EP0180642A4 (en) 1984-02-24 1985-02-20 Data display apparatus.
PCT/JP1985/000070 WO1985003795A1 (en) 1984-02-24 1985-02-20 Data display apparatus
KR8570258A KR890005189B1 (en) 1984-02-24 1985-10-17 Display apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59032613A JPH0723987B2 (en) 1984-02-24 1984-02-24 Information display device

Publications (2)

Publication Number Publication Date
JPS60177395A true JPS60177395A (en) 1985-09-11
JPH0723987B2 JPH0723987B2 (en) 1995-03-15

Family

ID=12363699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59032613A Expired - Lifetime JPH0723987B2 (en) 1984-02-24 1984-02-24 Information display device

Country Status (4)

Country Link
EP (1) EP0180642A4 (en)
JP (1) JPH0723987B2 (en)
KR (1) KR890005189B1 (en)
WO (1) WO1985003795A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137292A (en) * 1986-11-28 1988-06-09 スタンレー電気株式会社 Intensity of illumination control for information display panel
JPH0495453U (en) * 1991-01-16 1992-08-19
JP2012147029A (en) * 2012-05-07 2012-08-02 Pioneer Electronic Corp Organic el device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654963B2 (en) * 1986-01-24 1994-07-20 三菱電機株式会社 Flat matrix CRT brightness adjustment method
FR2615977B1 (en) * 1987-05-27 1991-11-08 Imerval Sa ON BOARD EQUIPMENT FOR DATA PROCESSING AND TRANSMISSION
US5122781A (en) * 1990-09-06 1992-06-16 Bolan Trading Inc. Hazard warning light
GB9914575D0 (en) * 1999-06-22 1999-08-25 Secretary Environment Brit Method and apparatus for displaying variable messages to road users
GB9919536D0 (en) * 1999-08-19 1999-10-20 Koninkl Philips Electronics Nv Active matrix electroluminescent display device

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JPS5240995A (en) * 1975-09-29 1977-03-30 Kyodo Micro Ranpu Kk Pulural-distribution luminescent diode lighting equipment
JPS53128297A (en) * 1977-04-14 1978-11-09 Toshiba Corp Display device
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JPS5741669U (en) * 1980-08-21 1982-03-06
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JPS52143071A (en) * 1976-05-24 1977-11-29 Sanyo Electric Co Ltd Brightness modulation circuit for electronic timepiece

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137292A (en) * 1986-11-28 1988-06-09 スタンレー電気株式会社 Intensity of illumination control for information display panel
JPH0495453U (en) * 1991-01-16 1992-08-19
JP2012147029A (en) * 2012-05-07 2012-08-02 Pioneer Electronic Corp Organic el device

Also Published As

Publication number Publication date
WO1985003795A1 (en) 1985-08-29
EP0180642A4 (en) 1989-06-13
EP0180642A1 (en) 1986-05-14
KR890005189B1 (en) 1989-12-16
JPH0723987B2 (en) 1995-03-15

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