JPH0714909Y2 - Luminance marker generation circuit - Google Patents
Luminance marker generation circuitInfo
- Publication number
- JPH0714909Y2 JPH0714909Y2 JP1989086931U JP8693189U JPH0714909Y2 JP H0714909 Y2 JPH0714909 Y2 JP H0714909Y2 JP 1989086931 U JP1989086931 U JP 1989086931U JP 8693189 U JP8693189 U JP 8693189U JP H0714909 Y2 JPH0714909 Y2 JP H0714909Y2
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- Prior art keywords
- signal
- luminance
- resistor
- sweep
- brightness
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Description
【考案の詳細な説明】 （イ）産業上の利用分野 この考案は輝度マーカ発生回路に係り、特に、陰極線管
を用いた掃引回路を有する表示装置の輝度変調による輝
度マーカ信号の精度及び、安定性を向上するのに好適な
輝度マーカ発生回路に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a luminance marker generating circuit, and more particularly, to the accuracy and stability of a luminance marker signal by luminance modulation of a display device having a sweep circuit using a cathode ray tube. The present invention relates to a luminance marker generation circuit suitable for improving the property.
（ロ）従来技術 従来の輝度マーカ発生回路としては、例えば、第５図の
ブロック図で示すようなものが提供されていた。(B) Conventional Technology As a conventional luminance marker generation circuit, for example, the one shown in the block diagram of FIG. 5 has been provided.
図において、11は掃引信号発生回路、12はコンパレータ
回路、13は増幅器、14は供与直流電圧源、15は遅延掃引
ゲート回路、16は輝度制御回路、17は遅延掃引信号発生
回路、18は陰極線管、18aは水平偏向板、18bは第１グリ
ッドである。In the figure, 11 is a sweep signal generating circuit, 12 is a comparator circuit, 13 is an amplifier, 14 is an applied DC voltage source, 15 is a delayed sweep gate circuit, 16 is a brightness control circuit, 17 is a delayed sweep signal generation circuit, and 18 is a cathode line. A tube, 18a is a horizontal deflection plate, and 18b is a first grid.
第５図に示すブロック図の構成は陰極線管上に輝点を掃
引する掃引信号の他に、この掃引された輝点上の一部分
を時間的に拡大して表示させるための遅延掃引信号を発
生させると共に、この遅延掃引の期間を輝点マーカとし
て陰極線管上に表示させるようにしたものである。The configuration of the block diagram shown in FIG. 5 generates not only a sweep signal for sweeping a bright spot on the cathode ray tube but also a delayed sweep signal for displaying a part of the swept bright spot in a temporally enlarged manner. In addition, the delayed sweep period is displayed as a bright spot marker on the cathode ray tube.
ブロック図の動作を説明すると、掃引信号発生回路11で
は陰極線管上で輝点を掃引させるための掃引信号を第６
図ａで示すように出力する。以下掃引信号をａとする。The operation of the block diagram will be described. In the sweep signal generation circuit 11, the sweep signal for sweeping the bright spot on the cathode ray tube is changed to the sixth sweep signal.
Output as shown in FIG. Hereinafter, the sweep signal is referred to as a.
また、掃引信号発生回路11では掃引信号と同じ時間幅の
第６図ｂで示す掃引輝度信号も出力させる。The sweep signal generation circuit 11 also outputs the sweep luminance signal shown in FIG. 6b having the same time width as the sweep signal.
掃引信号発生回路11から出力した掃引信号ａは、増幅器
13に加えられて増幅された後陰極線管18の水平偏向板18
aに出力する。The sweep signal a output from the sweep signal generation circuit 11 is an amplifier
Horizontal deflection plate 18 of cathode ray tube 18 after being added to 13 and amplified
Output to a.
また、掃引信号ａはコンパレータ12に加えられ供与直流
電圧源14の電圧Ｖと比較されてこの電圧Ｖよりも電圧レ
ベルが高い時間だけ第６図ｃで示すコンパレータ出力信
号をコンパレータ12により出力する。Further, the sweep signal a is applied to the comparator 12 and compared with the voltage V of the supplied DC voltage source 14, and the comparator 12 outputs the comparator output signal shown in FIG. 6C only during the time when the voltage level is higher than this voltage V.
なお、上記供与直流電圧源14の電圧Ｖは可変できるよう
になっていて、この電圧Ｖを可変することによってコン
パレータ出力信号ｃのスタート点が変わるようになって
いる。The voltage V of the supplied DC voltage source 14 can be varied, and the start point of the comparator output signal c is changed by varying the voltage V.
コンパレータ出力信号ｃは遅延掃引ゲート回路15に加え
られ、遅延掃引ゲート回路15をトリガして第６図ｄで示
す遅延掃引輝度信号を出力する。The comparator output signal c is applied to the delayed sweep gate circuit 15 to trigger the delayed sweep gate circuit 15 to output the delayed sweep luminance signal shown in FIG. 6d.
遅延掃引ゲート回路15より出力した遅延掃引輝度信号ｄ
は、遅延掃引信号発生回路17に加えられ設定された遅延
掃引時間に応じた第６図ｆで示す遅延掃引信号を発生さ
せる。Delayed sweep luminance signal d output from the delayed sweep gate circuit 15
Generates a delayed sweep signal shown in FIG. 6f in accordance with the delayed sweep time set by the delayed sweep signal generation circuit 17.
この遅延掃引信号ｆは増幅器13に送られ増幅器13に設け
られた電気的切替器の操作によって掃引信号ａの一部分
の時間を早めて掃引させるように動作する。The delayed sweep signal f is sent to the amplifier 13 and operates so as to accelerate the time of a part of the sweep signal a by operating an electric switching device provided in the amplifier 13.
一方、遅延掃引輝度信号ｄは輝度制御回路16にも加えら
れて、掃引信号発生回路11で出力した掃引輝度信号ｂと
加えられ第６図ｅで示す輝度信号として陰極線管18の第
１グリッド18bに出力する。On the other hand, the delayed sweep brightness signal d is also added to the brightness control circuit 16 and is added to the sweep brightness signal b output from the sweep signal generating circuit 11 as a brightness signal shown in FIG. Output to.
陰極線管18の第１グリッド18bに加えられた輝度信号ｅ
は掃引輝度信号ｂと遅延掃引輝度信号ｄとが合成されて
いるので、遅延掃引輝度信号ｄの時間幅だけ掃引輝度信
号ｂより正の電位で電位が高められている。Luminance signal e applied to the first grid 18b of the cathode ray tube 18.
Since the swept luminance signal b and the delayed swept luminance signal d are combined, the potential is increased at a positive potential higher than the swept luminance signal b by the time width of the delayed swept luminance signal d.
従って、第１グリッドを通過するカソードからの電子の
流れは、この遅延掃引輝度信号ｄの時間だけ電子の量が
増加したことになって、第６図ｇで示すように陰極線管
18の管面上に掃引される輝点上により輝度の明るい部分
Ａが生じることになる。Therefore, the flow of electrons from the cathode passing through the first grid means that the amount of electrons has increased during the time of the delayed sweep luminance signal d, as shown in FIG. 6g.
A bright spot A is generated on the bright spots swept on the surface of the tube.
上記のような状態で供与直流電圧源14のレベルを変える
ことによって、輝点の明るい部分Ａの位置を変化させる
ことができ輝度マーカとしての働きをさせている。By changing the level of the applied direct-current voltage source 14 in the above-mentioned state, the position of the bright portion A of the bright spot can be changed, which serves as a luminance marker.
（ハ）考案が解決しようとする問題点 しかし、上記した従来の輝度マーカ発生回路において
は、第５図及び、第６図で示すように遅延掃引の期間を
輝度変調してマーカとしているので、遅延掃引時間の設
定によってはこのマーカの時間幅も変化してしまい、一
定幅の輝度マーカとして単独に使用できない欠点があっ
た。(C) Problems to be solved by the device However, in the above-described conventional luminance marker generation circuit, since the delay sweep period is luminance-modulated as a marker as shown in FIGS. 5 and 6, The time width of this marker also changes depending on the setting of the delayed sweep time, and there is a drawback that it cannot be used independently as a brightness marker of a constant width.
この考案は上記した点に鑑みてなされたものであり、そ
の目的とするところは従来例の欠点を解消し、一定の時
間幅で掃引時間等に関係なく単独に動作して輝度マーカ
信号を発生できる輝度マーカ発生回路を提供するところ
にある。The present invention has been made in view of the above points, and its object is to solve the drawbacks of the conventional example and to independently generate a luminance marker signal with a constant time width regardless of the sweep time or the like. It is an object to provide a luminance marker generation circuit that can be used.
（ニ）問題を解決するための手段 この考案の輝度マーカ発生回路は、陰極線管と、この陰
極線管上に輝点を掃引させるための掃引信号発生回路
と、この掃引信号を増幅する増幅器と、前記輝点に輝度
を与えるための輝度マーカ発生回路と、前記輝度マーカ
発生回路のコンパレータに比較電圧を供給する供与直流
電源と、前記掃引信号発生回路からの輝度信号と前記輝
度マーカ発生回路からの出力信号とを受けて輝度制御す
る輝度制御回路とからなる陰極管制御手段において、第
１の演算増幅器の非反転入力端子及び第２の演算増幅器
の反転入力端子とに電圧可変の前記供与直流電源の出力
電圧を印加し、第１の電源ライン及び掃引信号入力端子
間に第１の抵抗器と第２の抵抗器とを直列に接続し、前
記第１の演算増幅器の反転入力端子を前記第１の抵抗器
と前記第２の抵抗器との接続中点に接続し、前記第２の
演算増幅器の非反転入力端子を前記掃引信号入力端子に
接続して前記掃引信号が供給されるようにすると共に、
前記第１の演算増幅器と前記第２の演算増幅器とのそれ
ぞれの出力端子を第３の抵抗器と第４の抵抗器とを介し
て並列接続し、前記第３の抵抗器と前記第４の抵抗器と
の接続中点より前記出力信号を前記輝度信号制御回路に
供給して輝度マーカ信号を発生するように構成したもの
である。(D) Means for solving the problem The luminance marker generating circuit of the present invention is a cathode ray tube, a sweep signal generating circuit for sweeping a bright spot on the cathode ray tube, an amplifier for amplifying the sweep signal, A brightness marker generating circuit for giving brightness to the bright spot, a supply DC power supply for supplying a comparison voltage to a comparator of the brightness marker generating circuit, a brightness signal from the sweep signal generating circuit, and a brightness marker from the brightness marker generating circuit. In a cathode ray tube control means comprising a brightness control circuit for receiving an output signal and controlling the brightness, the supplied DC power source whose voltage is variable to the non-inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier. Is connected to the first power supply line and the sweep signal input terminal in series between the first power supply line and the sweep signal input terminal, and the inverting input terminal of the first operational amplifier is connected to the inverting input terminal of the first operational amplifier. The sweep signal is supplied by connecting the first resistor and the second resistor to a connection midpoint, and connecting the non-inverting input terminal of the second operational amplifier to the sweep signal input terminal. As well as
The respective output terminals of the first operational amplifier and the second operational amplifier are connected in parallel via a third resistor and a fourth resistor, and the third resistor and the fourth resistor are connected in parallel. The output signal is supplied to the luminance signal control circuit from the midpoint of connection with a resistor to generate a luminance marker signal.
（ホ）作用 この考案によれば、陰極線管と、この陰極線管上に輝点
を掃引させるための掃引信号発生回路と、この掃引信号
を増幅する増幅器と、前記輝点に輝度を与えるための輝
度マーカ発生回路と、前記輝度マーカ発生回路のコンパ
レータに比較電圧を供給する供与直流電源と、前記掃引
信号発生回路からの輝度信号と前記輝度マーカ発生回路
からの出力信号とを受けて輝度制御する輝度制御回路と
からなる陰極管制御手段において、第１の演算増幅器の
非反転入力端子及び第２の演算増幅器の反転入力端子と
に電圧可変の前記供与直流電源の出力電圧を印加し、第
１の電源ライン及び掃引信号入力端子間に第１の抵抗器
と第２の抵抗器とを直列に接続し、前記第１の演算増幅
器の反転入力端子を前記第１の抵抗器と前記第２の抵抗
器との接続中点に接続し、前記第２の演算増幅器の非反
転入力端子を前記掃引信号入力端子に接続して前記掃引
信号が供給されるようにすると共に、前記第１の演算増
幅器と前記第２の演算増幅器とのそれぞれの出力端子を
第３の抵抗器と第４の抵抗器とを介して並列接続し、前
記第３の抵抗器と前記第４の抵抗器との接続中点より前
記出力信号を前記輝度信号制御回路に供給して輝度マー
カ信号を発生するように構成したので、輝度マーカ信号
のマーカ輝点の幅及び、輝度を輝度マーカ発生回路を構
成する抵抗の一部を変えることによって単独に設定する
ことができ、掃引時間や遅延掃引時間の他の操作によて
輝度マーカ信号が変化することがなく一定の輝度マーカ
信号が得られる。(E) Action According to the present invention, the cathode ray tube, the sweep signal generating circuit for sweeping the bright spot on the cathode ray tube, the amplifier for amplifying the sweep signal, and the brightness signal for giving brightness to the bright spot. Brightness control is performed by receiving a brightness marker generation circuit, a DC power supply for supplying a comparison voltage to the comparator of the brightness marker generation circuit, a brightness signal from the sweep signal generation circuit and an output signal from the brightness marker generation circuit. In the cathode ray tube control means including a brightness control circuit, the output voltage of the variable DC power supply is applied to the non-inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, A first resistor and a second resistor are connected in series between the power supply line and the sweep signal input terminal, and the inverting input terminal of the first operational amplifier is connected to the first resistor and the second resistor. With resistor The first operational amplifier and the second operational amplifier are connected to a midpoint of connection, and the non-inverting input terminal of the second operational amplifier is connected to the sweep signal input terminal to supply the sweep signal. Output terminals from the operational amplifier are connected in parallel via a third resistor and a fourth resistor, and the output is output from the midpoint of connection between the third resistor and the fourth resistor. Since the signal is supplied to the luminance signal control circuit to generate the luminance marker signal, the width of the marker bright spot of the luminance marker signal and the luminance can be changed by a part of the resistor constituting the luminance marker generation circuit. The brightness marker signal can be independently set, and a constant brightness marker signal can be obtained without changing the brightness marker signal by other operations of the sweep time and the delayed sweep time.
（ヘ）実施例 この考案に係る輝度マーカ発生回路の実施例を第１図乃
至第４図に基づいて説明する。(F) Embodiment An embodiment of the luminance marker generation circuit according to the present invention will be described with reference to FIGS. 1 to 4.
第１図はこの考案の輝度マーカ発生回路の回路図、第２
図は輝度マーカ発生回路のタイミングチャート、第３図
はこの考案による陰極線管制御のブロック図、第４図陰
極線管制御のタイミングチャートである。FIG. 1 is a circuit diagram of a luminance marker generation circuit of this invention, and FIG.
FIG. 3 is a timing chart of the luminance marker generation circuit, FIG. 3 is a block diagram of cathode ray tube control according to the present invention, and FIG. 4 is a timing chart of cathode ray tube control.
図において、１及び、２は演算増幅器、３は供与直流電
圧源、４は掃引信号発生回路、５は増幅器、６は輝度マ
ーカ発生回路、７は輝度制御回路、８は陰極線管、8aは
水平偏向板、8bは第１グリッドである。In the figure, 1 and 2 are operational amplifiers, 3 is a supply DC voltage source, 4 is a sweep signal generation circuit, 5 is an amplifier, 6 is a luminance marker generation circuit, 7 is a luminance control circuit, 8 is a cathode ray tube, and 8a is horizontal. The deflector plate 8b is the first grid.
第１図の輝度マーカ発生回路について説明すると、回路
構成としては演算増幅器２の非反転入力端子には、掃引
信号発生回路４からのノコギリ波上の掃引信号が入力さ
れていて、更に、演算増幅器１の反転入力端子にも抵抗
R3を介して抵抗R2によって電圧＋Ｖが加えられた掃引信
号が入力している。Explaining the luminance marker generating circuit of FIG. 1, the circuit configuration is such that the sweep signal on the sawtooth wave from the sweep signal generating circuit 4 is input to the non-inverting input terminal of the operational amplifier 2, and further the operational amplifier is used. Resistor to the inverting input terminal of 1
The sweep signal to which the voltage + V is applied by the resistor R 2 is input via R 3 .
また、演算増幅器１の非反転入力端子と演算増幅器２の
反転入力端子には、供与直流電圧源３から可変抵抗器VR
と抵抗R4とで分圧された電圧が加えられている。Further, the non-inverting input terminal of the operational amplifier 1 and the inverting input terminal of the operational amplifier 2 are connected to the variable resistor VR from the applied DC voltage source 3.
And the voltage divided by the resistor R 4 is applied.
演算増幅器１及び、２の出力端子は、それぞれ抵抗R1及
び、R1′を介して並列接続されている。The output terminals of the operational amplifiers 1 and 2 are connected in parallel via resistors R 1 and R 1 ′, respectively.
回路の動作としては、演算増幅器２の非反転入力端子に
は第２図Ａで示すノコギリ波の掃引信号がOvよりevの変
化レベルで入力する一方、演算増幅器１の反転入力端子
には第２図Ｃで示す｛R3／（R2＋R3）｝・Ｖ＋｛R2／
（R2＋R3）｝・ｅで変化する電圧レベルの信号が入力す
る。As the operation of the circuit, the sawtooth wave sweep signal shown in FIG. 2A is input to the non-inverting input terminal of the operational amplifier 2 at a change level of e v from O v, while the inverting input terminal of the operational amplifier 1 is input. As shown in FIG. 2C, {R 3 / (R 2 + R 3 )} V + {R 2 /
(R 2 + R 3 )} ・ The signal of the voltage level that changes with e is input.
一方、演算増幅器１の非反転入力端子と演算増幅器２の
反転入力端子とには、第２図Ｂで示す直流電圧レベルが
可変抵抗器VRのセンタタップ端子より加わるので、演算
増幅器１の出力端子には第２図ＣのレベルとＢのレベル
が比較されて第２図Ｃのレベルの方がＢのレベルより小
さい間は、第２図Ｄで示す＋Ｖのレベルが出力し、Ｃの
レベルの方がＢのレベルより大きくなると−Ｖレベルが
出力するコンパレータ動作をする。On the other hand, the DC voltage level shown in FIG. 2B is applied to the non-inverting input terminal of the operational amplifier 1 and the inverting input terminal of the operational amplifier 2 from the center tap terminal of the variable resistor VR. 2C is compared with the B level. While the level of FIG. 2C is smaller than the B level, the + V level shown in FIG. 2D is output and the C level of When it becomes larger than the level of B, the comparator operation that the -V level is output is performed.
掃引信号が立下りOvに戻る時、再びＣのレベルは、Ｂの
レベル以下になるので演算増幅器１の出力Ｄのレベルは
−Ｖのレベルに復帰する。When the sweep signal returns to the falling edge O v , the level of C again becomes equal to or lower than the level of B, so that the level of the output D of the operational amplifier 1 returns to the level of −V.
また、演算増幅器２の出力端子には、第２図Ａのレベル
とＢのレベルが比較され、Ａの掃引信号レベルがＢのレ
ベルより小さい間は第２図Ｅで示す−Ｖのレベルが出力
し、ＡのレベルがＢのレベルより大きくなるのと＋Ｖの
レベルが出力する。The level of B in FIG. 2 is compared with the level of B in FIG. 2 at the output terminal of the operational amplifier 2, and the level of −V shown in FIG. 2E is output while the sweep signal level of A is smaller than the level of B. However, when the level of A becomes larger than the level of B, the level of + V is output.
掃引信号が立下りOvに戻る時、再びＡのレベルは、Ｂの
レベル以下になるので演算増幅器２の出力Ｅのレベルは
−Ｖのレベルに復帰する。When the sweep signal returns to the falling edge O v , the level of A again becomes equal to or lower than the level of B, so that the level of the output E of the operational amplifier 2 returns to the level of −V.
従って、演算増幅器１と２の出力は抵抗R1及び、R1′を
介して結合されているので、ＤのレベルとＥのレベルが
加算されOvレベルと−Ｖのレベルで変化する第２図Ｆの
波形が出力することになりこの出力がすなわち輝度マー
カ信号となる。Therefore, since the outputs of the operational amplifiers 1 and 2 are coupled through the resistors R 1 and R 1 ′, the D level and the E level are added and the second level changes at the O v level and the −V level. The waveform of FIG. F will be output, and this output will be the luminance marker signal.
この輝度マーカ信号であるＦの波形の時間幅を可変する
には、抵抗R2及び、R3の比を変えることで可能であり、
また、輝度の調整は抵抗R1及びR1′を可変することが可
能である。The time width of the waveform of F, which is the luminance marker signal, can be changed by changing the ratio of the resistors R 2 and R 3 .
Further, the brightness can be adjusted by changing the resistors R 1 and R 1 ′.
第３図及び、第４図に基づいてこの考案の輝度マーカ発
生回路を実施した陰極線管制御動作について説明する。A cathode ray tube control operation in which the luminance marker generating circuit of the present invention is implemented will be described with reference to FIGS. 3 and 4.
第３図の陰極線管制御のブロック図の構成としては、掃
引信号発生回路４から出力した掃引信号ａは、増幅器５
に加えられる一方、輝度マーカ発生回路６にも加えられ
ている。In the configuration of the block diagram of the cathode ray tube control of FIG. 3, the sweep signal a output from the sweep signal generating circuit 4 is the amplifier 5
In addition to the above, it is also added to the luminance marker generation circuit 6.
また、掃引信号発生回路４で発生する輝度信号ｃは、輝
度制御回路７に加えられている。The brightness signal c generated by the sweep signal generation circuit 4 is added to the brightness control circuit 7.
輝度信号発生回路６では入力された掃引信号ａと供与直
流電圧ｆとが比較され輝度マーカ信号ｂを出力して、輝
度制御回路７に加えられる。In the brightness signal generation circuit 6, the input sweep signal a and the supplied DC voltage f are compared with each other to output a brightness marker signal b, which is applied to the brightness control circuit 7.
輝度制御回路７からの出力信号ｄは、陰極線管８の第１
グリッド8bに加えられている。The output signal d from the brightness control circuit 7 is the first signal of the cathode ray tube 8.
Added to grid 8b.
また、掃引信号ａの増幅器５からの出力は、陰極線管８
の水平偏向板8aに加えられている。Further, the output of the sweep signal a from the amplifier 5 is the cathode ray tube 8
Is added to the horizontal deflection plate 8a.
第４図のタイミングチャートについて説明すると、掃引
信号発生回路４で発生したノコギリ波状の掃引信号ａ
は、輝度マーカ発生回路６で供与直流電圧源で設定され
たｆで示す電圧Ｖと比較されて輝度マーカ信号ｂが発生
する。Explaining the timing chart of FIG. 4, the sawtooth-shaped sweep signal a generated by the sweep signal generation circuit 4
Is compared with the voltage V indicated by f set by the applied DC voltage source in the luminance marker generation circuit 6 to generate the luminance marker signal b.
この輝度マーカ信号ｂは輝度制御回路７で掃引信号発生
回路４で発生された輝度信号Ｃと加算され、正の輝度変
調信号にするために反転されて輝度マーカ信号重畳の輝
度信号ｄを出力する。This brightness marker signal b is added to the brightness signal C generated by the sweep signal generation circuit 4 in the brightness control circuit 7, inverted to form a positive brightness modulation signal, and the brightness signal d superimposed with the brightness marker signal is output. .
輝度制御回路７から出力した輝度マーカ信号重畳の輝度
信号ｄが陰極線管８の第１グリッド8bに加わると輝度マ
ーカ信号の部分が正電圧のより高いレベルになっている
ので、陰極線管８の管面上には、ｅで示すように掃引輝
点上に輝度マーカＡが他の掃引部分よりも明るく輝度変
調される。When the luminance signal d superimposed on the luminance marker signal output from the luminance control circuit 7 is applied to the first grid 8b of the cathode ray tube 8, the portion of the luminance marker signal is at a higher level of the positive voltage. On the surface, as indicated by e, the brightness marker A is brightness-modulated on the sweep bright point brighter than the other sweep portions.
この輝度変調された輝度マーカＡの掃引輝点上の移動
は、輝度マーカ発生回路６に加えられている供与直流電
圧Ｖを供与直流電圧源３で可変してやることで調整でき
る。The movement of the brightness-modulated brightness marker A on the sweep bright spot can be adjusted by changing the supplied DC voltage V applied to the brightness marker generation circuit 6 by the supplied DC voltage source 3.
（ト）考案の効果 この考案に係る輝度マーカ発生回路によれば、陰極線管
と、この陰極線管上に輝点を掃引させるための掃引信号
発生回路と、この掃引信号を増幅する増幅器と、前記輝
点に輝度を与えるための輝度マーカ発生回路と、前記輝
度マーカ発生回路のコンパレータに比較電圧を供給する
供与直流電源と、前記掃引信号発生回路からの輝度信号
と前記輝度マーカ発生回路からの出力信号とを受けて輝
度制御する輝度制御回路とからなる陰極管制御手段にお
いて、第１の演算増幅器の非反転入力端子及び第２の演
算増幅器の反転入力端子とに電圧可変の前記供与直流電
源の出力電圧を印加し、第１の電源ライン及び掃引信号
入力端子間に第１の抵抗器と第２の抵抗器とを直列に接
続し、前記第１の演算増幅器の反転入力端子を前記第１
の抵抗器と前記第２の抵抗器との接続中点に接続し、前
記第２の演算増幅器の非反転入力端子を前記掃引信号入
力端子に接続して前記掃引信号が供給されるようにする
と共に、前記第１の演算増幅器と前記第２の演算増幅器
とのそれぞれの出力端子を第３の抵抗器と第４の抵抗器
とを介して並列接続し、前記第３の抵抗器と前記第４の
抵抗器との接続中点より前記出力信号を前記輝度信号制
御回路に供給して輝度マーカ信号を発生するように構成
したので、輝度マーカ信号のマーカ幅や輝度を単独で設
定できると共に他の掃引操作によって影響されることが
なく、精度及び、安定度の高い輝度マーカ発生回路を構
成できる効果がある。(G) Effect of the Invention According to the luminance marker generating circuit of the present invention, a cathode ray tube, a sweep signal generating circuit for sweeping a bright spot on the cathode ray tube, an amplifier for amplifying the sweep signal, and A luminance marker generation circuit for giving luminance to a bright spot, a supply DC power supply for supplying a comparison voltage to a comparator of the luminance marker generation circuit, a luminance signal from the sweep signal generation circuit and an output from the luminance marker generation circuit In a cathode ray tube control means comprising a brightness control circuit for receiving a signal and controlling the brightness, a non-inverting input terminal of the first operational amplifier and an inverting input terminal of the second operational amplifier are provided with a variable voltage of the supplied DC power supply. An output voltage is applied, a first resistor and a second resistor are connected in series between the first power supply line and the sweep signal input terminal, and the inverting input terminal of the first operational amplifier is connected to the first
Of the second operational amplifier and the non-inverting input terminal of the second operational amplifier are connected to the sweep signal input terminal so that the sweep signal is supplied. At the same time, the respective output terminals of the first operational amplifier and the second operational amplifier are connected in parallel via a third resistor and a fourth resistor, and the third resistor and the third resistor are connected. Since the output signal is supplied to the luminance signal control circuit from the midpoint of connection with the resistor of No. 4 to generate the luminance marker signal, the marker width and luminance of the luminance marker signal can be set independently and There is an effect that a luminance marker generating circuit having high accuracy and stability can be configured without being affected by the sweep operation of.
しかも、構造が簡単であって、また、安価に構成するこ
とができるため実施も容易であるなどの優れた特長を有
している。Moreover, it has excellent features such as a simple structure and easy implementation because it can be constructed at low cost.
第１図乃至第４図はこの考案に係る輝度マーカ発生回路
の実施例を示し、第１図は輝度マーカ発生回路の回路
図、第２図は輝度マーカ発生回路のタイミングチャー
ト、第３図は陰極線管制御のブロック図、第４図は陰極
線管制御のタイミングチャートである。 第５図乃至第６図は従来例を示し、第５図は陰極線管制
御のブロック図、第６図は陰極線管制御のタイミングチ
ャートである。 主な符号の説明 1,2:演算増幅器 3:供与直流電圧源 4:掃引信号発生回路 5:増幅器 6:輝度マーカ発生回路 7:輝度制御回路 8:陰極線管 8a:水平偏向板 8b:第１グリッド1 to 4 show an embodiment of a luminance marker generation circuit according to the present invention, FIG. 1 is a circuit diagram of the luminance marker generation circuit, FIG. 2 is a timing chart of the luminance marker generation circuit, and FIG. A block diagram of the cathode ray tube control, and FIG. 4 is a timing chart of the cathode ray tube control. 5 to 6 show a conventional example, FIG. 5 is a block diagram of cathode ray tube control, and FIG. 6 is a timing chart of cathode ray tube control. Explanation of main symbols 1,2: Operational amplifier 3: Supply DC voltage source 4: Sweep signal generation circuit 5: Amplifier 6: Brightness marker generation circuit 7: Brightness control circuit 8: Cathode ray tube 8a: Horizontal deflection plate 8b: First grid
Claims (1)
させるための掃引信号発生回路と、この掃引信号を増幅
する増幅器と、前記輝点に輝度を与えるための輝度マー
カ発生回路と、前記輝度マーカ発生回路のコンパレータ
に比較電圧を供給する供与直流電源と、前記掃引信号発
生回路からの輝度信号と前記輝度マーカ発生回路からの
出力信号とを受けて輝度制御する輝度制御回路とからな
る陰極管制御手段において、 第１の演算増幅器の非反転入力端子及び第２の演算増幅
器の反転入力端子とに電圧可変の前記供与直流電源の出
力電圧を印加し、 第１の電源ライン及び掃引信号入力端子間に第１の抵抗
器と第２の抵抗器とを直列に接続し、前記第１の演算増
幅器の反転入力端子を前記第１の抵抗器と前記第２の抵
抗器との接続中点に接続し、前記第２の演算増幅器の非
反転入力端子を前記掃引信号入力端子に接続して前記掃
引信号が供給されるようにすると共に、前記第１の演算
増幅器と前記第２の演算増幅器とのそれぞれの出力端子
を第３の抵抗器と第４の抵抗器とを介して並列接続し、
前記第３の抵抗器と前記第４の抵抗器との接続中点より
前記出力信号を前記輝度信号制御回路に供給して輝度マ
ーカ信号を発生するように構成したことを特徴とする輝
度マーカ発生回路。1. A cathode ray tube, a sweep signal generating circuit for sweeping a bright spot on the cathode ray tube, an amplifier for amplifying the sweep signal, and a luminance marker generating circuit for giving luminance to the bright spot. A brightness control circuit that receives a brightness signal from the sweep signal generation circuit and an output signal from the brightness marker generation circuit to control the brightness. In the cathode-ray tube control means, the output voltage of the supplied DC power source whose voltage is variable is applied to the non-inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, and the first power supply line and the sweep are applied. A first resistor and a second resistor are connected in series between signal input terminals, and an inverting input terminal of the first operational amplifier is connected to the first resistor and the second resistor. Connect to midpoint , A non-inverting input terminal of the second operational amplifier is connected to the sweep signal input terminal to supply the sweep signal, and each of the first operational amplifier and the second operational amplifier The output terminal of is connected in parallel via the third resistor and the fourth resistor,
Luminance marker generation characterized in that the output signal is supplied to the luminance signal control circuit from a midpoint of connection between the third resistor and the fourth resistor to generate a luminance marker signal. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989086931U JPH0714909Y2 (en) | 1989-07-26 | 1989-07-26 | Luminance marker generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989086931U JPH0714909Y2 (en) | 1989-07-26 | 1989-07-26 | Luminance marker generation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327363U JPH0327363U (en) | 1991-03-19 |
| JPH0714909Y2 true JPH0714909Y2 (en) | 1995-04-10 |
Family
ID=31636574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989086931U Expired - Lifetime JPH0714909Y2 (en) | 1989-07-26 | 1989-07-26 | Luminance marker generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0714909Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3820260A (en) * | 1973-05-22 | 1974-06-28 | T Flowers | Steam pressing iron having self cleaning means |
| JPS5531427A (en) * | 1978-08-24 | 1980-03-05 | Sankyo Co Ltd | Automatic centrifugal separator |
-
1989
- 1989-07-26 JP JP1989086931U patent/JPH0714909Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0327363U (en) | 1991-03-19 |
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