JPS5876770A - Digital lighting indicator - Google Patents

Digital lighting indicator

Info

Publication number
JPS5876770A
JPS5876770A JP17372081A JP17372081A JPS5876770A JP S5876770 A JPS5876770 A JP S5876770A JP 17372081 A JP17372081 A JP 17372081A JP 17372081 A JP17372081 A JP 17372081A JP S5876770 A JPS5876770 A JP S5876770A
Authority
JP
Japan
Prior art keywords
level
input signal
light emitting
lighting
triangular wave
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
JP17372081A
Other languages
Japanese (ja)
Inventor
Mitsuami Yamada
山田 三綱
Kokugin Haku
白 国岑
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 Aviation Electronics Industry Ltd
Original Assignee
Japan Aviation Electronics Industry Ltd
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 Aviation Electronics Industry Ltd filed Critical Japan Aviation Electronics Industry Ltd
Priority to JP17372081A priority Critical patent/JPS5876770A/en
Publication of JPS5876770A publication Critical patent/JPS5876770A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00Arrangements for displaying electric variables or waveforms
    • G01R13/40Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/404Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
    • G01R13/405Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
    • G01R13/406Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs representing measured value by a dot or a single line

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE:To enable the indication of mediant value of adjacent level signals as well by controlling level indication luminous means by superposing a triangular wave signal which is lower in level than the difference between adjacent level signals. CONSTITUTION:The level signal from an amplifier 12 is added and superposed a low level signal lower than the difference between the adjacent level signals which passes through a triangular wave generation circuit 11 and amplitude adjuster 14 by means of an adder 13 and is impressed into a lighting circuit 10. As a result, a pair of LED D1-Dn corresponding to adjacent signal levels are concurrently lighted up thereby to enable digital indication of input signal level of mediant value level of adjacent signal levels.

Description

【発明の詳細な説明】 本発明は、指示計器に関し、特に、ディジタル点灯式指
示器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to indicating instruments, and more particularly to digital illuminated indicators.

電圧計や電流計のように、入力信号レベルを指針を振ら
せて指示するようなアナログ式のものに代えて、入力信
号レベルが予め定めたレベルになったことを検出して対
応する発光ダイオードやランプ等を点灯するようになし
た点灯式指示器が用いられて来ている。しかしながら、
このようなディジタル点灯式では、現在の入力信号レベ
ルが現在点灯指示されているレベル値に等しいか、それ
よ)犬か小かが不明で、指示精度は予め定めた指示値の
ステップによって一義的に定まってしまう。
Instead of analog type voltmeters and ammeters that indicate the input signal level by waving a pointer, a light emitting diode that detects and responds when the input signal level reaches a predetermined level. Illuminated indicators that light up lights, lamps, etc. have been used. however,
In this type of digital lighting system, it is unknown whether the current input signal level is equal to the level value currently instructed to turn on or not, and the indication accuracy is uniquely determined by the predetermined step of the indication value. It is decided that

精度を上げるには、それだけレベル検出器と発光体の数
を増加させなければならない。また既存の指示器の精度
を上げるとなると、それらの増加のみでなく、レベル検
出器自体の検出レベルを変更しなければならず、実用的
ではない。
To increase accuracy, the number of level detectors and light emitters must be increased accordingly. Furthermore, increasing the accuracy of existing indicators requires not only an increase in their accuracy, but also a change in the detection level of the level detector itself, which is not practical.

本発明はレベル検出器や発光体の数を従来のままとして
指示精度を倍にしたディジタル点灯式指示針を提供する
ことを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a digitally lit pointer that doubles the pointing accuracy while keeping the number of level detectors and light emitters the same as before.

本発明の他の目的は、既存の指示器の精度を簡単に倍増
できる指示器の構成を提供することである。
Another object of the present invention is to provide an indicator configuration that can easily double the accuracy of existing indicators.

本発明は、入力信号の最低レベルから最高レベル迄の予
め定められた複数のレベルに1対1で対応する発光手段
を設け、レベル検出手段で上記入力信号レベルが上記予
め定めた複数のレベルのいずれにあるかを検出して対応
する上記発光手段へ点灯信号を送出して、入力信号のレ
ベルをディジタル表示するようにしたディジタル点灯式
指示器において、上記予め定められた複数のレベルの隣
接レベル間のレベル差よシ小さな波高値を有する三角波
発生器と、該三角波発生器の出力を上記入力信号に重畳
する加算器とを有し、これによって上記入力信号レベル
が上記予め定められた複数のレベルの隣接レベルの中間
にあるとき当該両隣接レベルに対応する上記両発光手段
を点灯させるようにしたことを特徴とするディジタル点
灯式指示器である。
The present invention provides a light emitting means that corresponds one-to-one to a plurality of predetermined levels of an input signal from the lowest level to the highest level, and the level detection means detects a level of the input signal that corresponds to a plurality of predetermined levels. In the digital lighting type indicator, which digitally displays the level of the input signal by detecting which of the plurality of predetermined levels is present and sending a lighting signal to the corresponding light emitting means, the adjacent level of the plurality of predetermined levels a triangular wave generator having a wave height value smaller than the level difference between the triangular wave generators, and an adder for superimposing the output of the triangular wave generator on the input signal, thereby increasing the input signal level to the plurality of predetermined signal levels. The digital lighting type indicator is characterized in that when the level is between adjacent levels, both of the light emitting means corresponding to both adjacent levels are lit.

以下1本発明の実施例を2図面を参照して、詳細に説明
する。
Hereinafter, one embodiment of the present invention will be described in detail with reference to two drawings.

簡単に言えば本発明は、第1図(a) 、 (b)に示
すように、ランプl−1,1−2,・・・、1−15.
1−16を整列させ、各ランプに対応する例えば電圧値
(V)のようなレベル値を並記して、ランプ点灯により
電圧を指示するようにした指示器において、隣接する二
つのランプの指示I/ペル値の中間のレベル値を両ラン
プの点灯(図では1−3と1−4の点灯の場合を例示)
によって指示させるよう((なし、これによってランプ
数を増加させることなく、指示精度を向上させることを
意図したものである。
Briefly speaking, the present invention provides lamps l-1, 1-2, . . . , 1-15, as shown in FIGS. 1(a) and 1(b).
1-16 are lined up and a level value, such as a voltage value (V), corresponding to each lamp is written in parallel, and the voltage is indicated by lighting the lamp. / Turn on both lamps at the middle level value of the pel value (the figure shows an example of lighting 1-3 and 1-4)
((None) This is intended to improve the pointing accuracy without increasing the number of lamps.

第2図を参照して、従来の指示器は、入力端子11+I
t、の一方の端11に十端子を接続され入力信号の予め
定められたレベルを検出するための比較器AI r A
2 +・・・、An、を有している。入力端子■5には
n個の抵抗R1+ R2+・・・、Rnを直列に接続し
た直列抵抗回路が接続されており、入力端子工りとこの
直列抵抗回路の他端間には定電圧源(図示せず)が接続
されており(端子工、側の電位を■19反対側の端子の
電位を■□として示す。)、各抵抗の接続点は比較器A
I + A2 +・・・l An−1の一端子にそれぞ
れ接続されている。かくして、定電圧源の電圧が抵抗R
1+ R2r・・・、Roで分割されて、比較器AI。
Referring to FIG. 2, the conventional indicator has an input terminal 11+I
a comparator AI r A for detecting a predetermined level of the input signal, with a ten terminal connected to one end 11 of t;
2 +..., An. A series resistance circuit in which n resistors R1+ R2+..., Rn are connected in series is connected to the input terminal 5, and a constant voltage source ( (not shown) is connected (the potential on the terminal side is shown as ■19, and the potential on the opposite side is shown as ■□), and the connection point of each resistor is
I + A2 +...l are each connected to one terminal of An-1. Thus, the voltage of the constant voltage source increases across the resistance R
1+ R2r..., divided by Ro, comparator AI.

A2.・・・、An−1の基準電圧v1+v21=・+
 Vn−t (Vt<■2.〈・・・<V、として各電
圧の差をΔ■とする)を与えている。従って、比較器A
I +A2 +・・・IAn−1は。
A2. ..., reference voltage v1+v21=・+ of An-1
Vn-t (Vt<■2.<...<V, and the difference between each voltage is Δ■) is given. Therefore, comparator A
I+A2+...IAn-1 is.

入力信号レベルがそれぞれの基準電圧以上になると出力
を発生する。
An output is generated when the input signal level exceeds the respective reference voltage.

比較器AI 、A2 、・・・I Ayl−1の出力は
排他的論理和回路(イクスクルーシブオア) E2 *
 g31・・・IEnれている排他的論理和回路E1の
他方の入力に接続され、また比較器A2 + AB +
・・・l An−1の出力は。
The output of the comparators AI, A2, . . . I Ayl-1 is an exclusive OR circuit E2 *
g31...IEn is connected to the other input of the exclusive OR circuit E1, and is also connected to the comparator A2 + AB +
...l The output of An-1 is.

排他的論理和回路E2 + E3 r・・・# En−
1の他方の入力排他的論理和回路El、E2.・・・、
En−1+Enの出力(5) はNPN )ランジスタTrll Tr21 ・” +
 Try 1 r Trnのベースにそれぞれ接続され
ている。トランジスタTr1 + Tr2 +・・・+
 Tryのコレクタには、共通に電源電圧V。が与えら
れてお9.エミッタには、それぞれ点灯出力端子0. 
+ 02+・・、Onを介して2発光ダイオードDI 
ID2 +・・、Dnが接続され2発光ダイオードDI
 11)21・・・、Dnのカソードは共通抵抗Rgを
介して接地されている。
Exclusive OR circuit E2 + E3 r...# En-
1, the other input exclusive OR circuit El, E2 . ...,
Output (5) of En-1+En is NPN) transistor Trll Tr21 ・” +
Try 1 r is connected to the base of Trn, respectively. Transistor Tr1 + Tr2 +...+
The collectors of Try have a common power supply voltage V. 9. The emitters each have a lighting output terminal 0.
+ 02+..., 2 light emitting diodes DI via On
ID2 +..., Dn are connected and 2 light emitting diodes DI
11) The cathodes of 21..., Dn are grounded via a common resistor Rg.

このような回路において、入力信号のレベルが0から徐
々に上昇して+VIに至る迄は、排他的論理和回路E1
からII I II小出力現れ、トランジスタTrlが
オンとなっているので2点灯出力端子01から1点灯出
力が発光ダイオードDlへ供給されて発光ダイオードD
Iが点灯している。入力信号レベルが■1を越えると、
比較器A1から出力信号が現れるので、排他的論理和回
路Elの出力が”0″となり、一方E2の出力が現れる
。この結果トランジスタT r 1がオフとなり9発光
グイオードDlが消灯し、一方トランジスタTr2がオ
ンとなり2発光ダイオードD2が点灯する。以下(6) 入力信号レベルが■2.■3.・・・1vn−1と増加
するに従って、第3図に示されるように発光ダイオード
D3 + D4 +・・・、Dnと順次点滅する。
In such a circuit, until the level of the input signal gradually increases from 0 to +VI, the exclusive OR circuit E1
II I II A small output appears from II I II, and since the transistor Trl is on, the 1 lighting output is supplied from the 2 lighting output terminal 01 to the light emitting diode Dl, and the light emitting diode D
I is lit. When the input signal level exceeds ■1,
Since an output signal appears from the comparator A1, the output of the exclusive OR circuit El becomes "0", while the output of E2 appears. As a result, the transistor T r 1 is turned off and the nine light emitting diodes Dl are turned off, while the transistor Tr2 is turned on and the two light emitting diodes D2 are turned on. Below (6) Input signal level is ■2. ■3. ...1vn-1, the light emitting diodes D3+D4+..., Dn blink sequentially as shown in FIG.

なお、実際には回路ヒステリシスのため、入力レベルの
上昇時と下降時における点灯信号の現れる電圧には差が
あり、第3図では下降時の点灯電圧を■l、■2.・・
・l Vn−1で表わし、上昇時のそれを■、/ 、 
y2/ 、・・・、v、、’−,で表わした。このよう
な上昇時と下降時において点灯信号の現われる電圧の差
は小さい方が良いが、あまり小さいと誤動作を生ずる。
In reality, due to circuit hysteresis, there is a difference in the voltage at which the lighting signal appears when the input level rises and falls, and in FIG.・・・
・L Expressed as Vn-1, it is expressed as ■, / , when rising.
It is expressed as y2/,...,v,,'-,. It is better that the difference between the voltages at which the lighting signal appears during the rise and fall is small, but if it is too small, malfunctions will occur.

上述のような指示器では、指示精度が発光ダイオードの
数で決まってしまう。本発明は、この点を解決するため
に1本発明は入力信号に高周波の三角波を重畳すること
によって、各発光ダイオード指示値の中間値以上で隣接
する二つの発光ダイオードを点灯させるようになし、こ
れにより指示精度を2倍になしたものである。
In the above-mentioned indicator, the pointing accuracy is determined by the number of light emitting diodes. The present invention solves this problem by superimposing a high-frequency triangular wave on an input signal to light two adjacent light emitting diodes at a value equal to or higher than the intermediate value of each light emitting diode instruction value, This doubles the pointing accuracy.

第4図は本発明の一実施例を示すブロック図で。FIG. 4 is a block diagram showing one embodiment of the present invention.

同図において10は第2図に10で示す点灯回路様に発
光ダイオードDI+・・・、D□が接続されている。入
力信号は9点灯回路10の入力へ直接加えられず、高周
波三角波発生器11の出力三角波を重畳される。即ち、
入力信号は増幅器12で増幅された後加算器13へ入力
される。一方、三角波発生器11の出力は、振幅調整器
14で振幅調整されて、加算器13へ入力され入力信号
へ重畳される。加算器13の出力は増幅器15で増幅さ
れた後9点灯回路10へ入力される。
In the figure, reference numeral 10 has light emitting diodes DI+..., D□ connected like the lighting circuit shown at 10 in FIG. The input signal is not directly applied to the input of the nine lighting circuit 10, but is superimposed with the output triangular wave of the high frequency triangular wave generator 11. That is,
The input signal is amplified by an amplifier 12 and then input to an adder 13. On the other hand, the output of the triangular wave generator 11 is amplitude-adjusted by an amplitude adjuster 14, and is input to an adder 13 and superimposed on the input signal. The output of the adder 13 is amplified by an amplifier 15 and then input to a nine lighting circuit 10.

なお、増幅器15にはバイアス調整器16が付加されて
おり2点灯回路10へ入力される電圧が点灯回路10の
入力測定電圧範囲(第3図ではV、−V□で示される)
に入るように増幅器15のバイアスおよび利得調整を行
なっている。
A bias adjuster 16 is added to the amplifier 15, so that the voltage input to the two lighting circuits 10 is within the input measurement voltage range of the lighting circuit 10 (indicated by V, -V□ in FIG. 3).
The bias and gain of the amplifier 15 are adjusted so that

点灯回路10は第2図と同様であるので9点灯回路10
への入力電圧と点灯出力および発光ダイオードの点灯状
態は第5図(a)に示されるとおり。
Since the lighting circuit 10 is the same as that shown in FIG. 2, there are 9 lighting circuits 10.
The input voltage, lighting output, and lighting state of the light emitting diode are as shown in FIG. 5(a).

第3図と同様である。しかしながら、ここでは入力信号
に三角波が重畳されているので2発光ダイオードの点灯
は常時一つのみになるとは限らない。
It is similar to FIG. However, since a triangular wave is superimposed on the input signal here, it is not always the case that only one of the two light emitting diodes is lit.

第5図(b)を参照して、今三角波の中心、従って入力
信号レベルが■2と■3の中間、即ち■2+ΔV/2と
すると2重畳した三角波は波形Aで示される状態となる
。この状態で三角波の山および谷がそれぞれ電圧v3お
よびv2に達しないように、三角波の波高値を振幅調整
器14で調整しておく。ここでは波高値をΔV2にとっ
ている。従って入力信号レベルが■2+ΔV/2+ΔV
/4に変化したとき、波形Bに示すように三角波の山が
電圧レベル■3に接し、一方入力信号レベルが■2+Δ
V/2−ΔV/4に変化したとき、波形B′に示すよう
に三角波の谷が電圧レベル■2に接する。従って入力信
号レベルが■2+ΔV/2を中心として±ΔV/4の範
囲で変化しても。
Referring to FIG. 5(b), if the center of the triangular wave, and therefore the input signal level, is set between ■2 and ■3, ie, ■2+ΔV/2, the double triangular wave will be in the state shown by waveform A. In this state, the peak value of the triangular wave is adjusted by the amplitude adjuster 14 so that the peaks and troughs of the triangular wave do not reach the voltages v3 and v2, respectively. Here, the peak value is taken as ΔV2. Therefore, the input signal level is ■2+ΔV/2+ΔV
/4, as shown in waveform B, the peak of the triangular wave touches voltage level ■3, while the input signal level changes to ■2+Δ
When the voltage changes to V/2-ΔV/4, the trough of the triangular wave touches voltage level 2, as shown in waveform B'. Therefore, even if the input signal level changes within a range of ±ΔV/4 centered around ■2+ΔV/2.

点灯回路10への入力電圧はv3を越えないし。The input voltage to the lighting circuit 10 does not exceed v3.

■2より低くならないので2発光ダイオードD3のみが
点灯する。発光ダイオードD3の点灯は電圧レベル■2
+ΔV/2を指示するものとすると良い。
(2) Since it does not become lower than 2, only the 2-light emitting diode D3 lights up. Light-emitting diode D3 lights up at voltage level ■2
It is preferable to specify +ΔV/2.

更に、入力信号レベルが変化して第5図(b)で波形C
で示すように、その山が電圧v3′より上になる(9) と、出力端子04にも三角波の周波数で点灯信号が現わ
れる。−力出力端子o3の点灯信号も三角波の山が■3
′を越え再び■3へ降下する間途切れ従って三角波の周
波数で繰返し現れる。それ故。
Furthermore, the input signal level changes and the waveform C in FIG. 5(b)
As shown in (9), when the peak becomes higher than the voltage v3', a lighting signal with a triangular wave frequency also appears at the output terminal 04. - The lighting signal of the power output terminal o3 also has a triangular wave peak ■3
' and then descends again to ■3, where it is interrupted and appears repeatedly at the frequency of a triangular wave. Therefore.

この状態では発光ダイオードD3とD4とも点滅を繰返
すが、その周波数が高いので2両者とも点灯状態にある
。この両全光ダイオードD3 + D4の点灯で、電圧
レベルv3を指示するものとすると良い。
In this state, both the light emitting diodes D3 and D4 repeatedly blink, but since their frequency is high, both are in the lit state. It is preferable that the lighting of both photodiodes D3 + D4 indicates the voltage level v3.

ここで、入力信号レベルが■3と■3′の中間にあると
き、第5図(b)の波形Cにおいて、三角形abeと三
角形cdeとの面積が等しいので2面発光ダイオードD
3とD4の点灯時間T2とTIは同じとなり、従って両
者は同じ明るさである。この状態から、入力信号レベル
が低下して行くと。
Here, when the input signal level is between ■3 and ■3', in the waveform C of FIG.
The lighting times T2 and TI of 3 and D4 are the same, and therefore both have the same brightness. From this state, the input signal level begins to decrease.

波形Cのレベルが降下し、これによ9時間Tlは下げ幅
に比例して短かくなり、逆に時間T2は長くなるので2
発光ダイオードD3の方が明る< D4の方が暗くなる
。やがて、Cの波形がB波形の位置まで下ると9発光ダ
イオードD4は消灯状態にr1凸) なり+D3のみが点灯状態に保たれる。この下げ幅はΔ
V/4である。逆に入力信号レベルが上昇して行くと9
時間T1は上げ幅に比例して長くなり。
The level of waveform C decreases, and as a result, 9 hours Tl becomes shorter in proportion to the amount of decrease, and conversely, time T2 becomes longer, so 2
Light emitting diode D3 is brighter < D4 is darker. Eventually, when the C waveform falls to the position of the B waveform, the 9 light emitting diodes D4 turn off (r1 convex), and only +D3 remains lit. This amount of decline is Δ
It is V/4. Conversely, as the input signal level increases, 9
Time T1 becomes longer in proportion to the amount of increase.

T2は短かくなる。従って発光ダイオードD4が明るく
、D3が暗くなる。やがて入力信号レベルがΔV/4よ
り高くなると2発光ダイオードD4のみが点灯してD3
は消灯状態となる。
T2 becomes shorter. Therefore, the light emitting diode D4 becomes bright and the light emitting diode D3 becomes dark. Eventually, when the input signal level becomes higher than ΔV/4, only the two light emitting diodes D4 light up and D3
is turned off.

従って2発光ダイオードD3+D4の両方の点灯で、入
力信号レベルがv3±ΔV/4の範囲にあることが指示
され、しかも両ダイオードの明暗の差から■3より高い
か低いかも知ることができる。
Therefore, by lighting both of the two light emitting diodes D3+D4, it is indicated that the input signal level is in the range of v3±ΔV/4, and it can also be known whether it is higher or lower than 3 from the difference in brightness between the two diodes.

上側では、入力信号レベルが■2から■3を越える変化
の場合について説明したが、他の電圧レベルの変化でも
同様に一つの発光ダイオードの点灯状態から隣接する2
つの発光ダイオードの点灯状態にそして一つの発光ダイ
オードの点灯状態と変化する。従って、隣接する2、つ
の発光ダイオードの点灯状態で3つのレベルを指示でき
るので。
In the upper part, we have explained the case where the input signal level changes from ■2 to over ■3, but the same applies to other voltage level changes as well.
The lighting state of two light emitting diodes changes and then the lighting state of one light emitting diode changes. Therefore, three levels can be indicated by the lighting states of two adjacent light emitting diodes.

従来のディノタル点灯式の指示精度を2倍に上げること
ができる。
The indication accuracy of the conventional dinotal lighting system can be doubled.

三角波の波高値は、隣接する発光ダイオードの指示電圧
レベル差Δ■より小さければよいが、ΔV/2にとれば
1点灯状態の区別と指示電圧レベル範囲が重なったり、
途切れがなくなる利点がある。
The peak value of the triangular wave needs to be smaller than the difference in indicated voltage levels Δ■ between adjacent light emitting diodes, but if it is set to ΔV/2, the distinction between one lighting state and the indicated voltage level range overlap,
This has the advantage of eliminating interruptions.

重畳する三角波としては、最大振幅時を中心に対称な波
形のものでも、非対称のものでも良いが。
The triangular wave to be superimposed may have a symmetrical waveform or an asymmetrical waveform around the maximum amplitude.

非対称のもの2例えば鋸歯状波の場合、第6図に示すよ
うに1例えば■3.■3′のヒステリシス幅が大きいと
、鋸歯状波と電圧レベル■3.■3′で作る二つの三角
形△abcと△cdeとの面積が大きく異なり、それ故
山発光ダイオードD3+D4の点灯時間T2.T1 も
大きく異なるので2両発光ダイオードの両者点灯時の輝
度のバランスが悪くなる欠点がある。
In the case of an asymmetrical wave 2, for example a sawtooth wave, as shown in FIG. ■If the hysteresis width of 3' is large, the sawtooth wave and voltage level ■3. ■The areas of the two triangles △abc and △cde made by 3' are greatly different, so the lighting time of the mountain light emitting diodes D3+D4 is T2. Since T1 is also greatly different, there is a drawback that the balance of brightness between the two light emitting diodes when both are turned on becomes poor.

なお、三角波発生器11の一例を示せば、第7図(a)
に示すように矩形波発生回路111の出力(第7図(b
)の波形A)を積分器112で積分することによって、
第7図(b)の波形Bによって示すように、対称波形を
得ることができる。
An example of the triangular wave generator 11 is shown in FIG. 7(a).
As shown in FIG. 7(b), the output of the rectangular wave generation circuit 111
) by integrating the waveform A) with the integrator 112,
A symmetrical waveform can be obtained, as shown by waveform B in FIG. 7(b).

以上9本発明を特定の実施例について説明したが9本発
明はこの実施例に限定されるものではなく2種々の設計
が可能であることは言う迄もない。
Although the present invention has been described above with reference to a specific embodiment, it goes without saying that the present invention is not limited to this embodiment and that various designs are possible.

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

第1図(a) 、 (b)は本発明による指示器の指示
面の異なった例を示す正面図、第2図は、指示器点灯回
路の例を示す回路図、第3図はその動作を示す図、第4
図は本発明の一実施例を示すブロック図。 第5図はその動作を説明するための図、第6図は異なっ
た実施例の動作を説明するための図、第7図は三角波発
生器の一例を示すブロック図とその各部出力波形図であ
る。 1・・・ランプ(発光ダイオード) r AI +・・
・IAn。 ・・・比較器、R1,・・・、Rn・・抵抗r El 
r E2 +・・・、En・・・排他的論理和回路、0
□、・・・、0・・・点灯出力、Dl。 ・・・、Dn・・・発光ダイオード、10・・・点灯回
路、11・・・三角波発生回路、12・・・増幅回路、
13・・・加算器、14・・・振幅調整器、15・・・
増幅器、16・・・バイアス調整器。 (13) 第1図 (α) (b) 晰口3−1g四中
Figures 1 (a) and (b) are front views showing different examples of the indicator surface of the indicator according to the present invention, Figure 2 is a circuit diagram showing an example of the indicator lighting circuit, and Figure 3 is its operation. Figure 4 showing
The figure is a block diagram showing one embodiment of the present invention. Fig. 5 is a diagram for explaining its operation, Fig. 6 is a diagram for explaining the operation of different embodiments, and Fig. 7 is a block diagram showing an example of a triangular wave generator and its output waveform diagram of each part. be. 1... Lamp (light emitting diode) r AI +...
・IAn. ...Comparator, R1, ..., Rn...Resistance r El
r E2 +..., En... exclusive OR circuit, 0
□,...,0...Lighting output, Dl. ..., Dn... light emitting diode, 10... lighting circuit, 11... triangular wave generation circuit, 12... amplifier circuit,
13... Adder, 14... Amplitude adjuster, 15...
Amplifier, 16...bias adjuster. (13) Figure 1 (α) (b) Lucky mouth 3-1g four middle

Claims (1)

【特許請求の範囲】 ■、 入力信号の最低レベルから最高レベル迄の予め定
められた複数のレベルに1対1で対応する発光手段を設
け、レベル検出手段で上記入力信号レベルが上記予め定
めた複数のレベルのいずれにあるかを検出して対応する
上記発光手段へ点灯信号を送出して、入力信号のレベル
をディノタル表示するようにしたディ・フタル点灯式指
示器において、上記予め定められた複数のレベルの隣接
レベル間のレベル差より小さな波高値を有する三角波発
生器と、該三角波発生器の出力を上記入力信号に重畳す
る加算器とを有し、これによって上記入力信号レベルが
上記予め定められた複数のレベルの隣接レベルの中間に
あるとき、当該両隣接レベルに対応する上記両発光手段
を点灯させるようにしたことを特徴とするディジタル点
灯式指示器。 以下余日 (1)
[Claims] (1) A light emitting means is provided that corresponds one-to-one to a plurality of predetermined levels from the lowest level to the highest level of the input signal, and the level detection means detects the level of the input signal as determined by the predetermined level. In the DiFtal lighting indicator, which detects which of a plurality of levels the input signal is at and sends a lighting signal to the corresponding light emitting means to display the level of the input signal dinotally, the predetermined a triangular wave generator having a peak value smaller than a level difference between adjacent levels of a plurality of levels; and an adder that superimposes the output of the triangular wave generator on the input signal, whereby the input signal level is adjusted to the predetermined level. A digital lighting type indicator, characterized in that, when the level is between a plurality of predetermined adjacent levels, both of the light emitting means corresponding to both the adjacent levels are lit. Remaining days below (1)
JP17372081A 1981-10-31 1981-10-31 Digital lighting indicator Pending JPS5876770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17372081A JPS5876770A (en) 1981-10-31 1981-10-31 Digital lighting indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17372081A JPS5876770A (en) 1981-10-31 1981-10-31 Digital lighting indicator

Publications (1)

Publication Number Publication Date
JPS5876770A true JPS5876770A (en) 1983-05-09

Family

ID=15965888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17372081A Pending JPS5876770A (en) 1981-10-31 1981-10-31 Digital lighting indicator

Country Status (1)

Country Link
JP (1) JPS5876770A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185270U (en) * 1984-05-21 1985-12-09 有限会社 アスペン voltage display device
JPS6378391A (en) * 1986-09-19 1988-04-08 Sony Corp Level display device
WO2007016332A2 (en) * 2005-07-28 2007-02-08 Lutron Electronics Co., Inc. Apparatus and method for displaying operating characteristics on status indicators

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417052A (en) * 1977-07-07 1979-02-08 Nippon Chemical Ind Indication circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417052A (en) * 1977-07-07 1979-02-08 Nippon Chemical Ind Indication circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185270U (en) * 1984-05-21 1985-12-09 有限会社 アスペン voltage display device
JPS6378391A (en) * 1986-09-19 1988-04-08 Sony Corp Level display device
US7312695B2 (en) 2005-06-06 2007-12-25 Lutron Electronics Co., Inc. Apparatus and method for displaying operating characteristics on status indicators
WO2007016332A2 (en) * 2005-07-28 2007-02-08 Lutron Electronics Co., Inc. Apparatus and method for displaying operating characteristics on status indicators
WO2007016332A3 (en) * 2005-07-28 2007-04-05 Lutron Electronics Co Apparatus and method for displaying operating characteristics on status indicators

Similar Documents

Publication Publication Date Title
US4388558A (en) Display intensity control apparatus
US4358713A (en) Brightness control device for light emitting display of electronic meter
TWI591548B (en) Fingerprint detector
US3987392A (en) Luminescent voltage indicator circuit
US20080088244A1 (en) Variable Color Illumination Apparatus
CN108399889B (en) OLED pixel driving circuit
GB2042238A (en) Drive circuit for a liquid crystal display panel
TWI550578B (en) Light emitting device array billboard and control method thereof
JPH07262810A (en) Luminous device
CN106991970B (en) Organic light emitting display and its driving method
US11996040B2 (en) Display device to compensate image data based on sensing voltages
JP2001056670A (en) Self light emitting display element driving device
JPH04504780A (en) Device for adjusting the brightness of the light source for optical channels
JPS5876770A (en) Digital lighting indicator
US3577126A (en) Pulse responsive control network
JPS636802B2 (en)
CN1843032A (en) Video controlled detector sensitivity
US3944813A (en) Photoelectric control circuit for digital magnetic compass
US4365236A (en) Digital display circuit displayable in analog fashion
US5162789A (en) Fluorescent indicator apparatus
US4726658A (en) Effective value voltage stabilizer for a display apparatus
US4677340A (en) Method and apparatus for calibrating deflection in an oscilloscope
KR900000689B1 (en) Optical detector
JPS60157447A (en) Recording material roll having residual amount index and residual amount index detector
US4236178A (en) Electron microscope with brightness/contrast indicator