JPS63224477A - Deflecting high-voltage circuit - Google Patents
Deflecting high-voltage circuitInfo
- Publication number
- JPS63224477A JPS63224477A JP5645987A JP5645987A JPS63224477A JP S63224477 A JPS63224477 A JP S63224477A JP 5645987 A JP5645987 A JP 5645987A JP 5645987 A JP5645987 A JP 5645987A JP S63224477 A JPS63224477 A JP S63224477A
- Authority
- JP
- Japan
- Prior art keywords
- beam current
- voltage
- output
- voltage output
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000006641 stabilisation Effects 0.000 abstract description 7
- 238000011105 stabilization Methods 0.000 abstract description 7
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 102100027675 Guanine nucleotide exchange factor subunit RIC1 Human genes 0.000 description 1
- 101000581349 Homo sapiens Guanine nucleotide exchange factor subunit RIC1 Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は偏向・高圧回路に係り、特にテレビジョン受像
機やＣＲＴディスプレイモニタ等の陰極線管に流れるビ
ーム電流を検出し、高圧出力の安定化あるいは水平振幅
の安定化等を図ろうとする偏向・高圧回路に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a deflection/high-voltage circuit, and in particular detects the beam current flowing through cathode ray tubes of television receivers, CRT display monitors, etc., and stabilizes high-voltage output. Or it relates to a deflection/high-voltage circuit that attempts to stabilize horizontal amplitude.
〈従来の技術）
従来、テレビジョン受像機において、その除権線管に流
れるビーム電流を検出する手段としては、フライバック
トランスの高圧出力用二次巻線の低圧出力側端子と定電
圧電源あるいはアースとの間に抵抗及びコンデンサから
なる積分回路を挿入し、この抵抗の両端に現われる電位
差により陰極線管のビーム電流を検出するものが一般的
である。<Prior Art> Conventionally, in a television receiver, the means for detecting the beam current flowing through the decentralized line tube is to connect the low voltage output side terminal of the high voltage output secondary winding of the flyback transformer and the constant voltage power supply or Generally, an integrating circuit consisting of a resistor and a capacitor is inserted between the detector and the ground, and the beam current of the cathode ray tube is detected by the potential difference appearing across the resistor.
そのとき、フライバックトランスの高圧巻線に流れる電
流は水平周期のリンギング波形をしているため、ビーム
電流の検出出力としては高圧巻線の電流を積分して平坦
化する必要があり、その為、ビーム電流が変化したとき
の検出出力の応答は高圧の変動より遅くなるといった問
題点がある。At this time, the current flowing through the high-voltage winding of the flyback transformer has a ringing waveform with a horizontal period, so the current in the high-voltage winding must be integrated and flattened as the beam current detection output. However, there is a problem in that the response of the detection output when the beam current changes is slower than when the high voltage changes.
第５図は従来のビーム電流検出回路の一例を示す図であ
る。FIG. 5 is a diagram showing an example of a conventional beam current detection circuit.
同図中、１はフライバックトランス、１ａは高圧出力用
二次巻線の低圧出力側端子、１ｂは高圧出力側端子、１
Ｃは高圧整流ブロック、２は陰極線管、２ａは外部導電
膜、３はビーム電流検出回路（積分回路）、３ａは検出
抵抗、３ｂは積分用コンデンサである。In the figure, 1 is a flyback transformer, 1a is a low voltage output side terminal of the secondary winding for high voltage output, 1b is a high voltage output side terminal, 1
C is a high-voltage rectifier block, 2 is a cathode ray tube, 2a is an external conductive film, 3 is a beam current detection circuit (integrator circuit), 3a is a detection resistor, and 3b is an integrating capacitor.
第６図は第５図の等価回路を示す図で、同図中、Ｃｏは
陰極線管２のアノード容ｒで、通常、数百ｐＦ−数千ｌ
）Ｆである。FIG. 6 is a diagram showing the equivalent circuit of FIG. 5, where Co is the anode capacitance r of the cathode ray tube 2, which is usually several hundred pF to several thousand liters.
) F.
フライバックトランス１は、＠面直流電ＩＥｈと出力イ
ンピーダンスｒにより表わされ、ｒの値としては数ＭΩ
が一般的である。また、ＥＯは高圧を、ｌｂはビーム電
流をそれぞれ表わしている。The flyback transformer 1 is represented by @plane DC current IEh and output impedance r, and the value of r is several MΩ.
is common. Further, EO represents high voltage, and lb represents beam current.
更に、ビーム電流の検出用抵抗及び積分コンデンサは各
々Ｒ＋、Ｃ＋で表わしており、一般的にＲ１〈〈ｒであ
る。Further, the beam current detection resistor and the integrating capacitor are denoted by R+ and C+, respectively, and are generally R1<<r.
ここで、ビーム電流ＩｂがＯからｌｂ’ に瞬時に変化
したときの高圧出力Ｅｏ及びビーム電流検出出力Ｅｄは
それぞれ次の如く表わされる。Here, when the beam current Ib instantaneously changes from O to lb', the high voltage output Eo and the beam current detection output Ed are expressed as follows.
Ｅｏ＝Ｅｈ−ｒＩｂ’ （１−ｅ” ） −（
１）ここで、一般的なテレビジョン受ａ機の一例として
、
ｒ＝１．０ＭΩ、 Ｇ ｏ ＝２０００ｐＦ 、 ｒ
Ｇ ｏ ＝ ２１ｆｌＳｅＣ。Eo=Eh-rIb'(1-e") -(
1) Here, as an example of a general television receiver, r=1.0MΩ, G o =2000pF, r
G o = 21flSeC.
Ｒ、＝１０にΩ、Ｃ，＝０．１μＦ。R, = 10Ω, C, = 0.1 μF.
Ｒ＋Ｃ＋＝１ｍｓｅｃ、 Ｉｂ’ ＝２１１１＾、
Ｅｈ ＝２８ｋＶの多値を代入すると、
一±
Ｅ ｏ ＝２６ ［ｋＶ］ ＋２ ［ｋＶ］ ｘ ｅ
２ｃ” −（３）Ｅｄ ＝２０［ｖｌ −４０［
ｖｌ ｅ２に’＋２０［ｖｌ ｅ−＋ｍ＞ −（４＞
となり、各々第７図（Ａ）、（Ｂ）、（Ｃ）の波形図に
示すような変化特性となることがわかる。R+C+=1msec, Ib'=2111^,
Substituting the multivalue of Eh = 28kV, 1 ± E o = 26 [kV] + 2 [kV] x e
2c” −(3)Ed =20[vl −40[
'+20[vl e-+m>-(4>
It can be seen that the change characteristics are as shown in the waveform diagrams of FIGS. 7(A), (B), and (C), respectively.
従って、高圧あるいは水平偏向電流にビーム電流の変化
による補償をかけないときは、画面に白い四角い像を表
示させたときに、白い四角い部分の下側が広がってしま
う（第８図（Ａ））。Therefore, if the high voltage or horizontal deflection current is not compensated for by changes in the beam current, when a white square image is displayed on the screen, the bottom of the white square will expand (FIG. 8(A)).
また、ビーム電流検出出力Ｅｄによって高圧安定化又は
水平振幅を安定化させる制御回路等を働かせたときは第
８図（Ｂ）のような白い四角い部分の上側に歪が残って
しまう。Furthermore, when a control circuit for stabilizing high voltage or horizontal amplitude is activated by the beam current detection output Ed, distortion remains above the white square portion as shown in FIG. 8(B).
このように、従来のビーム電流検出回路では、検出出力
は必ず高圧変動よりも遅い応答をするため、その出力を
利用して高圧を安定化させたり、あるいは水平振幅を安
定化させようとすると、速い変動に追随できない問題点
を有していた。In this way, in conventional beam current detection circuits, the detection output always responds slower than the high voltage fluctuations, so if you try to use that output to stabilize the high voltage or stabilize the horizontal amplitude, This had the problem of not being able to keep up with rapid fluctuations.
そこで、本発明は上記した従来の技術の問題点を解決し
て、ビーム電流の急激な変化に対し、高圧の急激な変動
を抑える働きをすると同時に、高圧の変動と同じか、あ
るいはそれより速い応答特性を示ずビーム電流検出回路
を具備した偏向・高圧回路を提供し、更に、そのビーム
電流検出回路の検出出力を用いて高圧安定化あるいは水
平振幅の安定化をする制御回路で制御をかけることによ
り、歪のない画像を再現することができるようになる偏
向・高圧回路を提供することを目的とする。Therefore, the present invention solves the above-mentioned problems of the conventional technology, and works to suppress sudden fluctuations in high voltage in response to sudden changes in beam current, and at the same time, the fluctuations are as fast as or faster than fluctuations in high voltage. Provides a deflection/high voltage circuit that exhibits no response characteristics and is equipped with a beam current detection circuit, and further performs control using a control circuit that uses the detection output of the beam current detection circuit to stabilize the high voltage or stabilize the horizontal amplitude. The object of the present invention is to provide a deflection/high-voltage circuit that can reproduce distortion-free images.
（問題点を解決するための手段）
本発明は上記の目的を解決するために、フライバックト
ランスの高圧出力用二次巻線の低圧出力側端子と定電圧
電源あるいはアースとの間に抵抗及びコンデンサから成
る積分回路を直列に接続して、前記抵抗の両端に現われ
る電位差により陰極線管のビーム電流を検出するビーム
電流検出回路を具備してなる偏向・高圧回路において、
前記フライバックトランスの高圧出力用二次巻線の低圧
出力側端子と高圧出力側端子との間に高圧用コンデンサ
を接続してなる偏向・高圧回路を提供するものであり、
更に、ビーム電流検出回路からの出力を用いて高圧出力
を安定化させる制御回路を具備してなり、または、ビー
ム電流検出回路からの出力を用いて水平振幅を安定化さ
せる制御回路を具備してなるものである。(Means for Solving the Problems) In order to solve the above-mentioned object, the present invention provides a resistance between the low voltage output side terminal of the high voltage output secondary winding of a flyback transformer and a constant voltage power supply or ground. A deflection/high voltage circuit comprising a beam current detection circuit which detects the beam current of a cathode ray tube by connecting an integrating circuit consisting of a capacitor in series and detecting the beam current of a cathode ray tube based on the potential difference appearing across the resistor,
A deflection/high-voltage circuit is provided in which a high-voltage capacitor is connected between a low-voltage output side terminal and a high-voltage output side terminal of a secondary winding for high-voltage output of the flyback transformer,
Further, the control circuit includes a control circuit that uses the output from the beam current detection circuit to stabilize the high voltage output, or a control circuit that uses the output from the beam current detection circuit to stabilize the horizontal amplitude. It is what it is.
（実 施 例）
本発明になる偏向・高圧回路の一実施例について、以下
に図面と共に説明する。(Embodiment) An embodiment of the deflection/high voltage circuit according to the present invention will be described below with reference to the drawings.
第１図は本発明になる偏向・高圧回路の−実施例を示す
図である。なお、同図中、４は高圧用コンデンサで、そ
の他は前出の第５図中の同一構成部分には同一番号を付
しである。FIG. 1 is a diagram showing an embodiment of the deflection/high voltage circuit according to the present invention. In the figure, 4 is a high voltage capacitor, and other components that are the same as those in FIG. 5 are given the same numbers.
第１図では、フライバックトランス１の高圧出力用二次
巻線の低圧出力側端子１ａと高圧出力側端子１ｂとの間
に高圧用コンデンサ４を接続している。In FIG. 1, a high-voltage capacitor 4 is connected between a low-voltage output terminal 1a and a high-voltage output terminal 1b of a high-voltage output secondary winding of a flyback transformer 1.
第２図は第１図の等価回路を示す図で、同図中、高圧用
コンデンサ４をＣｏ’ で示し、その他は前出の第６図
中の同一構成部分には同一番号を付しである。Figure 2 is a diagram showing the equivalent circuit of Figure 1. In the figure, the high-voltage capacitor 4 is indicated by Co', and the same components as in Figure 6 above are designated by the same numbers. be.
ここで、ビーム電流１ｂがＯからＩｂ’ に瞬時に変化
したときの高圧出力ＥＯ及びビーム電流検出出力ｌａｄ
はそれぞれ以下のようになる。Here, when the beam current 1b changes instantaneously from O to Ib', the high voltage output EO and the beam current detection output lad
are as follows.
Ｅ ｏ ＝Ｅｈ −ｒ Ｉｂ′（１−６一−面”）
−・・（５）ここで、Ｃｏ ’ ＝２０００ｐＦ、その
他は従来例のところで用いた一例の値を代入すると、Ｅ
ｏ ＝２６ ［ｋＶ］ ＋ ２ ［ｋＶ］ Ｘ ｅ−
マ、、、（７）Ｅ ｄ ＝ ２０［Ｖ］ −１３，３［
ｖ］ Ｘ ｅ−ｈｈａ−６，７［Ｖ］ ｅ−マ
・・・（８）となり、第３図（Ａ）、（Ｂ）、
（Ｃ）の波形図にそれぞれ示すような変化特性どなる。E o = Eh −r Ib′ (1-6 one-plane”)
-...(5) Here, by substituting Co' = 2000 pF and other values from the example used in the conventional example, E
o = 26 [kV] + 2 [kV] X e-
Ma,, (7) E d = 20[V] -13,3[
v] X e-hha-6,7 [V] e-ma
...(8), and Figure 3 (A), (B),
The change characteristics are as shown in the waveform diagram (C).
第３図の（［３）と（Ｃ）を比べると、ビーム電流検出
出力Ｅｄは高圧出力Ｅｏの変動より応答が速いことがわ
かる。Comparing ([3) and (C) in FIG. 3], it can be seen that the response of the beam current detection output Ed is faster than the fluctuation of the high voltage output Eo.
また、（６）式の第３項係数がＯとなる条件は、となり
、すなわち、Ｒ＋Ｃ＋＝ｒＣｏ’ となるようにビーム
電流検出回路の積分回路の時定数ＲＩＣ１及び高圧用コ
ンデンサ４の容５１ Ｃ，ｏ ’ を選べば、ビーム電
流検出出力Ｅｄは高圧出力Ｅｏと同一の応答を示す特性
をもたせることができる。The conditions for the third term coefficient of equation (6) to be O are as follows: In other words, the time constant RIC1 of the integrating circuit of the beam current detection circuit and the capacitance 51 C of the high voltage capacitor 4 are such that R+C+=rCo'. , o', the beam current detection output Ed can have a characteristic showing the same response as the high voltage output Eo.
このように高圧出力Ｅｏ（の変動）と同じ応答特性をも
つビーム電流検出出力Ｅｄを用いて高圧安定化あるいは
水平振幅の安定化をする制御回路で制御をかければ、第
４図に示すような歪のない画像が再現できる。If the beam current detection output Ed, which has the same response characteristics as (fluctuations in) the high voltage output Eo, is used to perform control with a control circuit that stabilizes the high voltage or horizontal amplitude, the result will be as shown in Figure 4. Images without distortion can be reproduced.
また、上記高圧安定化の制御回路又は水平振幅の安定化
の制御回路が、時定数を有する制御特性をもつ場合は、
Ｒ＋Ｃ＋＜ｒＣｏ’の関係（値）にビーム電流検出回路
の時定数や高圧用コンデンサの容量を選び、安定化制御
回路を含めた総合した時定数をｒ （Ｃｏ＋Ｇｏ’ ）
となるようにすれば良い。Furthermore, if the above-mentioned high voltage stabilization control circuit or horizontal amplitude stabilization control circuit has control characteristics with a time constant,
Select the time constant of the beam current detection circuit and the capacity of the high-voltage capacitor for the relationship (value) of R+C+<rCo', and calculate the total time constant including the stabilization control circuit as r(Co+Go')
All you have to do is make it so that
（発明の効果）
以上の如く、従来のビーム電流検出回路においては、そ
の検出出力は必ず高圧の変動より遅い応答特性を示し、
その為、その検出出力を用いて高圧安定化あるいは水平
振幅の安定化の制御をかけたとき、ビーム電流の急変時
の画像の歪を補正することができなかったが、本発明に
おいては、ビーム電流の急激な変化に対し、高圧の急激
な変動を抑えることができると同時に、ビーム電流検出
出力は高圧の変動と同じか、あるいはそれよりも速い応
答特性を得ることができ、その検出出力を用いて高圧安
定化あるいは水平振幅の安定化を行なえば、ビーム電流
の急変時においても歪のない画像を再現できるといった
特長を有する。(Effects of the Invention) As described above, in the conventional beam current detection circuit, the detection output always shows a response characteristic slower than the fluctuation of high voltage.
Therefore, when controlling high voltage stabilization or horizontal amplitude stabilization using the detection output, it was not possible to correct image distortion caused by sudden changes in beam current. It is possible to suppress sudden fluctuations in high voltage in response to sudden changes in current, and at the same time, the beam current detection output can obtain response characteristics that are the same as or faster than the fluctuations in high voltage. It has the advantage of being able to reproduce distortion-free images even when the beam current changes suddenly by stabilizing high voltage or horizontal amplitude.
第１図は本発明になる偏向・高圧回路の一実施例を示す
図、第２図は第１図の等価回路を示す図、第３図（Ａ）
、（Ｂ）、（Ｃ）は本発明によるビーム電流１ｂ、高圧
出力Ｅｏ及びビーム電流検出出力Ｅｄの各特性を示す波
形図、第４図は本発明による画像の一例を示す図、第５
図は従来のビーム電流検出回路の一例を示す図、第６図
は第５図の等価回路を示す図、第７図（Ａ）、（Ｂ）。
＜Ｃ＞は従来のビーム電流１ｂ、高圧出力Ｅｏ及びビー
ム電流検出出力Ｅｄの各特性を示す波形図、第８図（Ａ
＞、（Ｂ）は従来の画像の一例を示す図である。
１・・・フライバックトランス、
１ａ・・・高圧出力用二次巻線の低圧出力側端子、１ｂ
・・・高圧出力側端子、１Ｃ・・・高圧整流ブロック、
２・・・陰極線管、２ａ・・・外部導電膜、３・・・ビ
ーム電流検出回路（積分回路）、３ａ・・・検出抵抗、
３ｂ・・・積分用コンデンサ、４・・・高圧用コンデン
サ、
Ｃｏ・・・陰極ａ管２のアノード容量、Ｃｏ’ ・・・
高圧用コンデンサ、
Ｃビ・・積分コンデンサ、Ｅｏ・・・高圧出力、Ｅｄ・
・・ビーム電流検出出力、
Ｅｈ・・・フライバック１〜ランス１の等価直流電源、
ｒｂ・・・ビーム電流、
Ｒビ・・ビーム電流ｒｂの検出用抵抗、ｒ・・・フライ
バックトランス１の出力インピーダンス。
才 １７
７２犯
才３ 口
ｔ ４ 扇
一’ｉ ５ １￥ｌ
ｔ
６ ｔ
′ｉ ７ 口
０４ン
（８）７ Ｂ ｒ５ろFig. 1 is a diagram showing an embodiment of the deflection/high voltage circuit according to the present invention, Fig. 2 is a diagram showing an equivalent circuit of Fig. 1, and Fig. 3 (A).
, (B), and (C) are waveform diagrams showing the characteristics of the beam current 1b, high voltage output Eo, and beam current detection output Ed according to the present invention, FIG. 4 is a diagram showing an example of an image according to the present invention, and FIG.
This figure shows an example of a conventional beam current detection circuit, FIG. 6 shows an equivalent circuit of FIG. 5, and FIGS. 7(A) and (B). <C> is a waveform diagram showing the characteristics of the conventional beam current 1b, high voltage output Eo, and beam current detection output Ed, FIG.
>, (B) is a diagram showing an example of a conventional image. 1...Flyback transformer, 1a...Low voltage output side terminal of secondary winding for high voltage output, 1b
...High voltage output side terminal, 1C...High voltage rectifier block,
2... Cathode ray tube, 2a... External conductive film, 3... Beam current detection circuit (integrator circuit), 3a... Detection resistor,
3b... Integrating capacitor, 4... High voltage capacitor, Co... Anode capacitance of cathode a tube 2, Co'...
High voltage capacitor, Cbi...integrating capacitor, Eo...high voltage output, Ed...
...Beam current detection output, Eh...Equivalent DC power supply for flyback 1 to lance 1,
rb...Beam current, Rbi...Resistance for detecting beam current rb, r...Output impedance of flyback transformer 1. Sai 17 72 Criminal Sai 3 Kuchi t 4 Ogiichi'i 5 1\l t 6 t 'i 7 Kuchi04n
(8) 7 B r5ro
Claims (3)
圧出力側端子と定電圧電源あるいはアースとの間に抵抗
及びコンデンサから成る積分回路を直列に接続して、前
記抵抗の両端に現われる電位差により陰極線管のビーム
電流を検出するビーム電流検出回路を具備してなる偏向
・高圧回路において、 前記フライバックトランスの高圧出力用二次巻線の低圧
出力側端子と高圧出力側端子との間に高圧用コンデンサ
を接続してなる偏向・高圧回路。(1) An integrating circuit consisting of a resistor and a capacitor is connected in series between the low-voltage output side terminal of the secondary winding for high-voltage output of the flyback transformer and a constant voltage power supply or ground, and the potential difference that appears across the resistor In a deflection/high-voltage circuit comprising a beam current detection circuit for detecting a beam current of a cathode ray tube using Deflection/high voltage circuit made by connecting high voltage capacitors.
を安定化させる制御回路を具備してなる特許請求の範囲
第１項記載の偏向・高圧回路。(2) The deflection/high voltage circuit according to claim 1, comprising a control circuit that stabilizes the high voltage output using the output from the beam current detection circuit.
を安定化させる制御回路を具備してなる特許請求の範囲
第１項記載の偏向・高圧回路。(3) The deflection/high voltage circuit according to claim 1, further comprising a control circuit that stabilizes the horizontal amplitude using the output from the beam current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645987A JPS63224477A (en) | 1987-03-13 | 1987-03-13 | Deflecting high-voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645987A JPS63224477A (en) | 1987-03-13 | 1987-03-13 | Deflecting high-voltage circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224477A true JPS63224477A (en) | 1988-09-19 |
| JPH0477502B2 JPH0477502B2 (en) | 1992-12-08 |
Family
ID=13027684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5645987A Granted JPS63224477A (en) | 1987-03-13 | 1987-03-13 | Deflecting high-voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63224477A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0246873A (en) * | 1988-08-10 | 1990-02-16 | Matsushita Electric Ind Co Ltd | Load control mechanism for physical training equipment |
| KR20010083406A (en) * | 2000-02-12 | 2001-09-01 | 김홍기 | High voltage regulation compensating circuit in a monitor |
-
1987
- 1987-03-13 JP JP5645987A patent/JPS63224477A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0246873A (en) * | 1988-08-10 | 1990-02-16 | Matsushita Electric Ind Co Ltd | Load control mechanism for physical training equipment |
| KR20010083406A (en) * | 2000-02-12 | 2001-09-01 | 김홍기 | High voltage regulation compensating circuit in a monitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0477502B2 (en) | 1992-12-08 |
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