JPS6340386B2 - - Google Patents
Info
- Publication number
- JPS6340386B2 JPS6340386B2 JP13917980A JP13917980A JPS6340386B2 JP S6340386 B2 JPS6340386 B2 JP S6340386B2 JP 13917980 A JP13917980 A JP 13917980A JP 13917980 A JP13917980 A JP 13917980A JP S6340386 B2 JPS6340386 B2 JP S6340386B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- transformer
- negative
- secondary winding
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 26
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 description 11
- 238000011105 stabilization Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
- H04N3/185—Maintaining dc voltage constant
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
【発明の詳細な説明】
本発明は高圧安定方式に係り、主としてオシロ
スコープなどに用いられる後段加速静電偏向形ブ
ラウン管用の安定化高圧電源の改良に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-voltage stabilization system, and mainly relates to an improvement in a stabilized high-voltage power supply for a post-acceleration electrostatic deflection cathode ray tube used in an oscilloscope or the like.
従来のこの種の高圧電源に用いられる高圧安定
化方式の一例の概略を第１図に示し説明すると、
図において、１は駆動回路で、この駆動回路１は
トランス２の１次巻線３に例えば50KHzの正弦波
の20Vppの電圧を発生させる。この電圧はトラン
ス２で昇圧され、２次巻線４，５にそれぞれ高圧
の交流電圧が発生する。そして、２次巻線４に得
られる高電圧の交流電圧はコツククロフト回路等
の倍電圧整流回路６によつてピーク対ピーク電圧
に応じた正の直流高電圧＋EA、例えば15KVが得
られる。一方、２次巻線５に得られる高電圧の交
流電圧は整流回路７により２次巻線５の負のピー
ク値に応じた負の直流高電圧−EK、例えば−
1.5KVが得られる。このようにして得られた正の
直流高電圧＋EAおよび負の直流高電圧−EKはそ
れぞれ後段加速の原理を応用した後段加速静電偏
向形ブラウン管（図示せず）のアノードおよびカ
ソードに供給されるように構成されている。 An example of a conventional high-voltage stabilization system used in this type of high-voltage power supply is schematically shown in Fig. 1 and explained as follows.
In the figure, 1 is a drive circuit, and this drive circuit 1 generates a voltage of 20 Vpp of a 50 KHz sine wave in the primary winding 3 of a transformer 2, for example. This voltage is stepped up by the transformer 2, and high-voltage alternating current voltages are generated in the secondary windings 4 and 5, respectively. The high AC voltage obtained in the secondary winding 4 is converted into a positive DC high voltage +E A corresponding to the peak-to-peak voltage, for example 15 KV, by a voltage doubler rectifier circuit 6 such as a Kotscroft circuit. On the other hand, the high AC voltage obtained at the secondary winding 5 is converted into a negative DC high voltage −E K corresponding to the negative peak value of the secondary winding 5 by the rectifier circuit 7, for example −
1.5KV is obtained. The positive DC high voltage +E A and negative DC high voltage -E K thus obtained are respectively supplied to the anode and cathode of a post-acceleration electrostatic deflection cathode ray tube (not shown) that applies the principle of post-acceleration. is configured to be
そして、上記負の直流高電圧−EKは分圧回路
８を通して制御回路９に加えられ、ここで比較電
圧ER1と比較されて駆動回路１を制御し、負の直
流高電圧−EKを一定に保つように構成されてい
る。 Then, the negative DC high voltage -E K is applied to the control circuit 9 through the voltage divider circuit 8, where it is compared with the comparison voltage E R1 to control the drive circuit 1, and the negative DC high voltage -E K is applied to the control circuit 9. It is designed to remain constant.
しかしながら、このような高圧安定化方式にお
いては、ブラウン管のカソード電流が増大したと
きには、整流回路７の整流ダイオードの順方向電
圧が増大し、それにもかかわらず負の直流高電圧
−EKを一定に保つように制御回路９が動作する
ためにトランス２の２次交流電圧は増大するとい
う不都合を生ずる。すなわち、従来の安定化方式
においては、負の直流高電圧−EKの負荷変化に
より正の直流高電圧＋EAが変化するという欠点
があつた。 However, in such a high voltage stabilization system, when the cathode current of the cathode ray tube increases, the forward voltage of the rectifier diode of the rectifier circuit 7 increases, and despite this, the negative DC high voltage -E K is kept constant. Since the control circuit 9 operates to maintain the voltage, the secondary AC voltage of the transformer 2 increases. That is, the conventional stabilization system has a drawback in that the positive high DC voltage +E A changes due to a load change in the negative high DC voltage -E K.
これについて詳記すれば、後段加速形ブラウン
管においては、アノード電圧＋EAによつて支配
される後段加速電界は電子を加速すると共に偏向
部で行われた電子ビームの偏向角を変化させる。
この作用を積極的に利用するため、偏向部と後段
加速部の間にメツシユ電極を配置し、メツシユの
形状を曲面状にして偏向角を増加させることによ
つて偏向感度を良くすることは周知であり、偏向
感度を２倍にすることは容易である。 More specifically, in the post-acceleration cathode ray tube, the post-acceleration electric field controlled by the anode voltage +E A accelerates electrons and changes the deflection angle of the electron beam in the deflection section.
It is well known that in order to take advantage of this effect, a mesh electrode is placed between the deflection section and the post-acceleration section, and the shape of the mesh is made into a curved surface to increase the deflection angle, thereby improving the deflection sensitivity. Therefore, it is easy to double the deflection sensitivity.
しかしながら、このような偏向の拡大は後段加
速電界によつているために、アノード電圧の変化
は偏向感度の変化を引きおこす。 However, since such amplification of deflection depends on the post-accelerating electric field, changes in anode voltage cause changes in deflection sensitivity.
すなわち、従来の高圧安定方式においては、輝
度を変化させたときに偏向感度が変化し、したが
つて、管面での表示の大きさが変化するという欠
点があつた。 That is, the conventional high-voltage stabilization system had the disadvantage that when the brightness was changed, the deflection sensitivity changed, and therefore the size of the display on the tube surface changed.
本発明は以上の点に鑑み、このような問題を解
決すべくなされたもので、その第１の目的は負荷
変化に対する安定度を向上し得る高圧安定方式を
提供することにある。また、第２の目的は駆動回
路およびトランスは各々１個で正負２つの安定な
高電圧を得る高圧安定方式を提供することにあ
り、また、第３の目的は特殊な高耐圧抵抗器を用
いないで高圧を安定化させることができる高圧安
定方式を提供することにある。 In view of the above points, the present invention was made to solve these problems, and its first purpose is to provide a high-pressure stabilization system that can improve stability against load changes. The second purpose is to provide a high-voltage stabilization system that obtains two stable high voltages, positive and negative, with one drive circuit and one transformer, and the third purpose is to use a special high-voltage resistor. An object of the present invention is to provide a high pressure stabilization method capable of stabilizing high pressure without having to do so.
このような目的を達成するために、本発明は、
正および負の直流高電圧を各々別の制御回路によ
つて安定化するようにしたもので、以下、図面に
基づき本発明の実施例を詳細に説明する。 In order to achieve such an objective, the present invention
The positive and negative DC high voltages are each stabilized by separate control circuits.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第２図は本発明による高圧安定方式の一実施例
の概略を示す構成図である。第２図において第１
図と同一符号のものは相当部分を示し、１０はト
ランス２の２次巻線、１１は入力端がこの２次巻
線１０に接続され、出力端が制御回路９の一方の
入力端に接続された電圧検出回路で、この電圧検
出回路１１は２次巻線１０のピーク対ピーク電圧
を検出する手段を構成している。そして、制御回
路９の他方の入力端には比較電圧ER1が印加され、
出力によつて駆動回路１を制御するように構成さ
れ、この電圧検出回路１１の出力によつて駆動回
路１の出力を制御する制御系は第１の安定化回路
を構成している。１２は分圧回路８よりの負電圧
を検出してその検出出力と基準電圧との誤差電圧
を求めその誤差電圧を直流負電圧に加算的に重畳
するよう構成された誤差増幅器で、この構成とす
るためこの誤差増幅器１２の他方の入力端には基
準電圧ER2が印加され、出力端は整流回路７の接
地電位に近い側の出力端子に接続され、これらは
第２の安定化回路を構成している。 FIG. 2 is a block diagram schematically showing an embodiment of the high pressure stabilization system according to the present invention. In Figure 2, the first
The same reference numerals as in the figure indicate corresponding parts, 10 is the secondary winding of the transformer 2, 11 is the input end connected to this secondary winding 10, and the output end is connected to one input end of the control circuit 9. This voltage detection circuit 11 constitutes means for detecting the peak-to-peak voltage of the secondary winding 10. A comparison voltage E R1 is applied to the other input terminal of the control circuit 9.
A control system configured to control the drive circuit 1 based on the output and controlling the output of the drive circuit 1 based on the output of the voltage detection circuit 11 constitutes a first stabilizing circuit. Reference numeral 12 denotes an error amplifier configured to detect the negative voltage from the voltage divider circuit 8, find the error voltage between the detected output and the reference voltage, and additively superimpose the error voltage on the DC negative voltage. Therefore, the reference voltage E R2 is applied to the other input terminal of this error amplifier 12, and the output terminal is connected to the output terminal of the rectifier circuit 7 closer to the ground potential, and these constitute a second stabilizing circuit. are doing.
つぎにこの第２図に示す実施例の動作を説明す
る。まず、２次巻線１０に発生する電圧は、２次
巻線１０と２次巻線４，５との結合を密にするこ
とは容易であるため、正確に２次巻線４，５の電
圧と対応している。この電圧はピーク対ピーク電
圧検出手段を形成する電圧検出回路１１を通して
制御回路９に加えられ、比較電圧ER1と比較され
て、その出力は駆動回路１を制御し、２次巻線に
発生する交流電圧を安定化する。これによつて、
正の直流高電圧＋EAが安定化される。ここで、
後段加速静電偏向形ブラウン管では、アノード電
流はカソード電流の30分の１程度と小さいので、
正の直流高電圧＋EAの負荷変化の影響は無視す
ることができる。 Next, the operation of the embodiment shown in FIG. 2 will be explained. First, the voltage generated in the secondary winding 10 can be accurately determined between the secondary windings 4 and 5 because it is easy to make a tight connection between the secondary winding 10 and the secondary windings 4 and 5. It corresponds to the voltage. This voltage is applied to the control circuit 9 through a voltage detection circuit 11 forming peak-to-peak voltage detection means and compared with a comparison voltage E R1 , the output of which controls the drive circuit 1 and is generated in the secondary winding. Stabilizes AC voltage. By this,
Positive DC high voltage +E A is stabilized. here,
In post-acceleration electrostatic deflection type cathode ray tubes, the anode current is small, about 1/30th of the cathode current, so
The effect of load change on positive DC high voltage + E A can be ignored.
一方、負の直流高電圧−EKは分圧回路８を通
して誤差増幅器１２に加えられ、ここで基準電圧
ER2と比較される。そして、その出力は整流回路
７の接地電位に近い側の出力端子に加えられ、負
の直流高電圧−EKを安定化する。これは、見方
を変えれば、一種の直列制御形安定回路である
が、前述の如く、交流電圧が安定化されているた
めに、その制御電圧範囲が小さくてすむことが特
長である。また、本発明によれば、制御回路の動
作電位が低くできるという利点がある。 On the other hand, the negative DC high voltage -E K is applied to the error amplifier 12 through the voltage divider circuit 8, where the reference voltage
Compared to E R2 . The output is then applied to the output terminal of the rectifier circuit 7 on the side closer to the ground potential, thereby stabilizing the negative high DC voltage -E K. If you look at it from another perspective, this is a type of series control type stabilizing circuit, but as mentioned above, since the AC voltage is stabilized, its feature is that the control voltage range can be small. Further, according to the present invention, there is an advantage that the operating potential of the control circuit can be lowered.
以上本発明をトランス２に２次巻線１０を設
け、この２次巻線１０のピーク対ピーク電圧を検
出する場合を例にとつて説明したが、本発明はこ
れに限定されるものではなく、このトランス２の
２次巻線１０の替りにトランス２の２次巻線５の
中間タツプより取り出すようにすることもでき
る。 Although the present invention has been described above using an example in which the secondary winding 10 is provided in the transformer 2 and the peak-to-peak voltage of the secondary winding 10 is detected, the present invention is not limited to this. Instead of the secondary winding 10 of the transformer 2, the secondary winding 5 of the transformer 2 may be taken out from an intermediate tap.
以上説明したように、本発明によれば、各々１
個の駆動回路および昇圧トランスによつて、安定
な正負の直流高電圧が得られるので、オシロスコ
ープ等における後段加速静電偏向ブラウン管によ
る表示が輝度を変えても安定にしてかつ正確に行
うことができるので、実用上の効果は極めて大で
ある。また、特殊な高耐圧抵抗器を用いることな
く高圧を安定化させることができるという点にお
いて極めて有効である。 As explained above, according to the present invention, each
Stable positive and negative DC high voltages can be obtained using a single drive circuit and a step-up transformer, making it possible to display images using a post-acceleration electrostatic deflection cathode ray tube in oscilloscopes, etc., stably and accurately even when the brightness changes. Therefore, the practical effect is extremely large. Further, it is extremely effective in that high voltage can be stabilized without using a special high voltage resistor.
第１図は従来の高圧安定化方式の一例の概略を
示す構成図、第２図は本発明による高圧安定方式
の一実施例の概略を示す構成図である。
１……駆動回路、２……トランス、３……１次
巻線、４，５……２次巻線、６……倍電圧整流回
路、７……整流回路、９……制御回路、１０……
２次巻線、１１……電圧検出回路、１２……誤差
増幅器。
FIG. 1 is a block diagram schematically showing an example of a conventional high-pressure stabilization system, and FIG. 2 is a block diagram schematically showing an embodiment of a high-pressure stabilization system according to the present invention. DESCRIPTION OF SYMBOLS 1... Drive circuit, 2... Transformer, 3... Primary winding, 4, 5... Secondary winding, 6... Voltage doubler rectifier circuit, 7... Rectifier circuit, 9... Control circuit, 10 ……
Secondary winding, 11... Voltage detection circuit, 12... Error amplifier.
Claims (1)
と、このトランスの１次巻線に交流電圧を印加す
る駆動回路と、前記トランスの第１の２次巻線の
ピーク対ピーク電圧に応じた直流正電圧を得る第
１の整流回路と、前記トランスの第２の２次巻線
の電圧に応じた直流負電圧を得る第２の整流回路
とを有し、前記直流正電圧および直流負電圧はそ
れぞれ後段加速静電偏向形ブラウン管のアノード
およびカソードに供給されるようにしてなるブラ
ウン管用の高圧電源において、前記トランスの２
次巻線のピーク対ピーク電圧を検出する手段と、
この手段によつて得られた出力によつて前記駆動
回路出力を制御する第１の安定化回路と、前記直
流負電圧を検出してその検出出力と基準電圧との
誤差電圧を求めその誤差電圧を前記直流負電圧に
加算的に重畳するよう構成された誤差増幅器を含
む第２の安定化回路とを備えたことを特徴とする
高圧安定方式。1. A transformer having a primary winding and a secondary winding, a drive circuit that applies an alternating current voltage to the primary winding of the transformer, and a drive circuit that applies an alternating current voltage to the primary winding of the transformer, and a a first rectifier circuit that obtains a direct current positive voltage; and a second rectifier circuit that obtains a direct current negative voltage according to the voltage of the second secondary winding of the transformer, the direct current positive voltage and the direct current negative voltage. In a high-voltage power supply for a cathode ray tube, which is supplied to the anode and cathode of a post-accelerating electrostatic deflection cathode ray tube, respectively, two of the transformers are
means for detecting the peak-to-peak voltage of the secondary winding;
a first stabilizing circuit that controls the drive circuit output using the output obtained by this means; and a first stabilizing circuit that detects the DC negative voltage and calculates an error voltage between the detected output and a reference voltage. and a second stabilizing circuit including an error amplifier configured to additively superimpose the DC negative voltage on the negative DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13917980A JPS5763968A (en) | 1980-10-03 | 1980-10-03 | High voltage stbilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13917980A JPS5763968A (en) | 1980-10-03 | 1980-10-03 | High voltage stbilizing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5763968A JPS5763968A (en) | 1982-04-17 |
| JPS6340386B2 true JPS6340386B2 (en) | 1988-08-10 |
Family
ID=15239402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13917980A Granted JPS5763968A (en) | 1980-10-03 | 1980-10-03 | High voltage stbilizing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5763968A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4901156A (en) * | 1986-12-26 | 1990-02-13 | Goldstart Co., Ltd. | Automatic brightness limiting circuit |
-
1980
- 1980-10-03 JP JP13917980A patent/JPS5763968A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5763968A (en) | 1982-04-17 |
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