JPS59110276A - Correcting circuit for horizontal amplitude variation - Google Patents
Correcting circuit for horizontal amplitude variationInfo
- Publication number
- JPS59110276A JPS59110276A JP22100382A JP22100382A JPS59110276A JP S59110276 A JPS59110276 A JP S59110276A JP 22100382 A JP22100382 A JP 22100382A JP 22100382 A JP22100382 A JP 22100382A JP S59110276 A JPS59110276 A JP S59110276A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- capacitor
- voltage
- horizontal amplitude
- correction
- 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
Links
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
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
Description
【発明の詳細な説明】
(イ)産業上の利用分野
本発明はテレビジョン受像機等のラスタの横幅即ち水平
振幅変化を補正する回路に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a circuit for correcting changes in raster width, ie, horizontal amplitude, of a television receiver or the like.
(ロ)従来技術
テレビジョン受像機のフライバックトランスより供給さ
れる受像管の陽極電圧C以下「高圧出力電圧」と称す)
は受像管に流れるビーム電流c以下「高圧負荷電流」と
称す)に応じて変化し、高圧負荷電流が最小のとき高圧
出力電圧は最大となる。(b) The anode voltage C of the picture tube supplied from the flyback transformer of the prior art television receiver is referred to as "high output voltage")
varies depending on the beam current c (hereinafter referred to as "high voltage load current") flowing through the picture tube, and when the high voltage load current is minimum, the high voltage output voltage is maximum.
また、テレビジョン受像機の画面の水平方向の振幅c以
下「水平振幅」と称す)は高圧出力電圧の上昇に伴って
受像管を流れる電子ビームの電子速度が速くなるので小
さくなる。Further, the horizontal amplitude c (hereinafter referred to as "horizontal amplitude") of the screen of a television receiver decreases because the electron speed of the electron beam flowing through the picture tube increases as the high output voltage increases.
従って、水平偏向回路の偏向電源電圧を一定とした場合
、高圧負荷電流の減少によって高圧出力電圧が上昇し水
平振幅は小さくなってしまう。また、高圧負荷電流の増
大によって高圧出力電圧が降下し水平振幅は大きくなる
。Therefore, when the deflection power supply voltage of the horizontal deflection circuit is kept constant, the high voltage output voltage increases due to a decrease in the high voltage load current, and the horizontal amplitude becomes small. Furthermore, as the high voltage load current increases, the high voltage output voltage drops and the horizontal amplitude increases.
このような振幅変化を補正するためには従来は第1図に
示すような回路構成を採用している。In order to correct such amplitude changes, a circuit configuration as shown in FIG. 1 has conventionally been adopted.
第1図において、(TR)は水平出力トランジスタ、(
D(1)はダンパダイオード、(Cr)は共振コンデン
サ、cLy)は水平偏向コイル、(CEl)は8字補正
用コンデンサ、mはフライバックトランス、(la)は
フライバックトランスK filの一次巻線、(1b)
はフライバックトランス(’1 )の二次巻線、Φ1)
は高圧整流ダイオード、(C)は受像管の等価容量であ
り、受像管は等制約に負荷(RX)で示している。また
、前記−次巻線(la)の一端は水平偏向コイル(Ly
)に接続されており、他端はコンデンサ(Co)に接続
され、その接続点(G)には抵抗(Ro)を介して水平
偏向回路供給用の+Bo電圧(14−Bo)が与えられ
ている。In FIG. 1, (TR) is a horizontal output transistor, (
D (1) is a damper diode, (Cr) is a resonant capacitor, cLy) is a horizontal deflection coil, (CEl) is a figure-8 correction capacitor, m is a flyback transformer, (la) is the primary winding of the flyback transformer K fil line, (1b)
is the secondary winding of the flyback transformer ('1), Φ1)
is a high-voltage rectifier diode, (C) is the equivalent capacitance of the picture tube, and the picture tube is shown as a load (RX) under equal constraints. Further, one end of the secondary winding (la) is connected to a horizontal deflection coil (Ly
), the other end is connected to a capacitor (Co), and the connection point (G) is supplied with +Bo voltage (14-Bo) for supplying the horizontal deflection circuit through a resistor (Ro). There is.
この第1図の動作は次のようになる。The operation shown in FIG. 1 is as follows.
まず、負荷(Rx)に流れる電流(11)が大きくなれ
ば等価容量(9の電荷が少なくなり〔即ち(C)の電圧
が低くなり〕、フライバック期間に二次巻線(lb)に
生じるフライバックパルス(FF)によす等価容量(C
)は十分充電されるが、このとき等価容量(C)に流れ
込む電流(12)は走査期間中の高圧負荷電流(11)
が太きければ大きい程大きくなる。そのフライバック期
間に前記(12)が流れることにより一次巻線(1a)
には(12)による誘導電流(13)が流れる。この(
13)が大きいと抵抗ノ0)の電圧降下は大きくなる。First, as the current (11) flowing through the load (Rx) increases, the charge on the equivalent capacitance (9) decreases [that is, the voltage at (C) decreases], which occurs in the secondary winding (lb) during the flyback period. Equivalent capacitance (C) for flyback pulse (FF)
) is sufficiently charged, but at this time, the current (12) flowing into the equivalent capacitance (C) is equal to the high voltage load current (11) during the scanning period.
The thicker it is, the larger it becomes. The flow of the above (12) during the flyback period causes the primary winding (1a) to
An induced current (13) due to (12) flows through. this(
If 13) is large, the voltage drop across resistor 0) will be large.
従ってコンデンサ(Co)に記憶される電圧は低くなり
、前記フライバック期間終了後に始まる走査期間ではコ
ンデンサ(Co)に記憶された低い電圧が一次巻線(l
a)を通して水平偏向回路に供給される。よって、前記
高圧負荷電流(11)の増大により高圧出力電圧が低下
して大きくなろうとする水平振幅は、前記コンデンサ(
Co)から加えられる低い偏向電源電圧のために抑えら
れて水平振幅が補正されるのである。Therefore, the voltage stored in the capacitor (Co) becomes low, and in the scanning period starting after the end of the flyback period, the low voltage stored in the capacitor (Co) becomes low in the primary winding (l).
a) is supplied to the horizontal deflection circuit. Therefore, the horizontal amplitude, which tends to increase as the high voltage output voltage decreases due to the increase in the high voltage load current (11), is caused by the capacitor (11).
The horizontal amplitude is corrected due to the low deflection power supply voltage applied from Co.
また、高圧負荷電流(11)が小さくなったときは、上
述の動作は逆になり、コンデンサ(CO)の電圧は高く
なるので、大きくなろうとする水平振幅はやはり抑えら
れて正規の寸法に保持される。In addition, when the high voltage load current (11) becomes small, the above operation is reversed and the voltage of the capacitor (CO) becomes high, so the horizontal amplitude that is about to increase is suppressed and the normal dimensions are maintained. be done.
このように第1図の回路で水平振幅の愛化を補正できる
が、この従来回路では次のような簡題点がある。As described above, the circuit shown in FIG. 1 can correct the horizontal amplitude distortion, but this conventional circuit has the following problems.
力損失が大きく、消費電力が大きくなるため水平振幅変
化の補正には限度がある。また、抵抗但0)の発熱量が
大きいため、プリント基板に実装するときその取付は位
置が制約されるとともに信頼性の面でも好ましく外かっ
た。Since the force loss is large and the power consumption is large, there is a limit to the correction of horizontal amplitude changes. In addition, since the amount of heat generated by the resistor (0) is large, its mounting position is restricted when it is mounted on a printed circuit board, and it is not desirable in terms of reliability.
(ハ) 目 的
本発明は、上記のような抵抗の電圧降下を利用せずに水
平振幅の補正を行なえるようにした水平振幅変化補正回
路を提供することを目的とする。(c) Purpose It is an object of the present invention to provide a horizontal amplitude change correction circuit that can correct the horizontal amplitude without using the voltage drop of the resistor as described above.
に)構成
本発明の水平振幅変化補正回路は、フライノ(ツクトラ
ンスに補正巻線を設け、該補正巻線に生じたパルスを整
流する手段と、該整流手段の整流電流を受けるコンデン
サとを設け、このコンデンサの電圧を偏向電源として使
用するべく前記コンデンサを前記−次巻線に接続してい
る。2) Structure The horizontal amplitude change correction circuit of the present invention includes a flywheel transformer provided with a correction winding, means for rectifying the pulse generated in the correction winding, and a capacitor for receiving the rectified current of the rectification means. , the capacitor is connected to the secondary winding in order to use the voltage of this capacitor as a deflection power source.
(ホ)実施例
本発明の一実施例を第1図と同一部分には同一図番を付
した第2図を参照しつつ説明する。(E) Embodiment An embodiment of the present invention will be described with reference to FIG. 2, in which the same parts as in FIG. 1 are given the same figure numbers.
第2図において、フライノ(ツクトランス(1)には補
正巻線(IC)が巻装されており、該補正巻線(IC)
の一端は+Bo電源(+BO)に接続され、他端は整流
ダイオードQ)2)を介して一次巻線(1a)に接続さ
れるとともに前記整流ダイオード(D2)と−次巻線(
1a)との接続点に)と補正巻線(IC)の前記一端と
の間にはコンデンサ(C1)を接続している。In FIG. 2, a correction winding (IC) is wound around the fly transformer (1), and the correction winding (IC)
One end is connected to the +Bo power supply (+BO), and the other end is connected to the primary winding (1a) via a rectifier diode (D2) and the − secondary winding (
A capacitor (C1) is connected between the connection point with 1a)) and the one end of the correction winding (IC).
斯る構成にすると、フライノ(ツク期間に補正巻線(1
c)に生じたパルス電圧(ト)は整流ダイオード(D2
)で整流されコンデ二4す(C1)に充電される。With such a configuration, the correction winding (1
The pulse voltage (g) generated in c) is passed through the rectifier diode (D2
) and charged to a condenser (C1).
これと同時にフライバック期間には第1図について説明
したように誘導電流(13)が流れる。この(13)は
フライバック期間におけるコンデンサ(C1)の放電電
流に相当するので、(13)が小さければ前記接続点(
→の電位は高く、また(13)が太きければ接続点(勾
の電位は低くなる。このようにしてフライバック期間に
設定された前記接続点CF−)の電位は走査期間中に保
持されて偏向回路の電源として働く。At the same time, an induced current (13) flows during the flyback period as described with reference to FIG. This (13) corresponds to the discharge current of the capacitor (C1) during the flyback period, so if (13) is small, the connection point (
The potential of → is high, and if (13) is thick, the potential of the connection point (the slope potential is low. In this way, the potential of the connection point CF- set in the flyback period) is maintained during the scanning period. serves as a power source for the deflection circuit.
従って、高圧負荷電流(11)の増大により高圧出力電
圧が低下して大きくなろうとする水平振幅は、前記コン
デンサ(C1)に保持された低い偏向電源電圧のために
抑えられて水平振幅が補正される。また、高圧負荷電流
(11)が小さくなったときは、コンデンサ(C1)が
高い電圧に保持されているので犬きくなろうとする水平
振幅はやはり抑えられて正規の寸法に保持される。しか
も、従来回路に比し、抵抗を用いないのでほとんど電力
損失のない水平振幅変化補正回路が得られる。Therefore, the horizontal amplitude, which tends to increase as the high voltage output voltage decreases due to the increase in the high voltage load current (11), is suppressed and the horizontal amplitude is corrected due to the low deflection power supply voltage held in the capacitor (C1). Ru. Furthermore, when the high-voltage load current (11) becomes small, since the capacitor (C1) is held at a high voltage, the horizontal amplitude that tends to become sharp is suppressed and the normal dimensions are maintained. Furthermore, compared to conventional circuits, since no resistance is used, a horizontal amplitude change correction circuit with almost no power loss can be obtained.
尚、コンデンサ(C1)の両端電圧y)K−1−Bo電
源に対して大きくなりすぎるとそれに応じて高圧負荷電
流(11)の変化に対するコンデンサ(C1)の両端電
圧の変化が大きくなりすぎて高圧出力電圧の変イヒ力(
大きくなるばかりでなく、フライノ(ツクトランス(1
)の付属巻線〔例えばヒータ巻線(Xa):)の電圧変
動が大きくなるので、−次巻線(la)と補正巻線(l
c)の巻数比は50:1以内にすること力!好ましい0
また、フライバックトランスは高圧出力電圧の変動を抑
制するため高調波同調カー行なわれているが、これを行
なう上で一般に低電圧動作(十BO電源として電池等の
電源によって低電圧力;供給されるテレビジョンセット
)に用いられるフライノくツクトランスは一次巻線の巻
数及び二次巻線の巻数を減らすことによって分布容量を
抑えている。そのため−次巻線(1a)に生じる電圧は
動作電圧の大きさに関係なく8ボルト前後であるので、
低電圧動作の場合子Bo電源電圧に対するコンデンサ(
C1)の両端電圧の比が大きくなるため、上述のような
不都合が生じる。従って本発明を実施するに当っては十
BO電源としては略100ボルト以上を供給する場合に
適用するのが望ましい。Furthermore, if the voltage across the capacitor (C1) becomes too large relative to the K-1-Bo power supply, the change in the voltage across the capacitor (C1) in response to a change in the high-voltage load current (11) will become too large. Variable power of high output voltage (
Not only will it get bigger, but it will also become bigger.
) of the attached winding [for example, the heater winding (Xa):
The turns ratio of c) should be within 50:1! Preferable 0 In addition, the flyback transformer uses harmonic tuning to suppress fluctuations in the high-voltage output voltage, but in order to do this, it generally operates at a low voltage (low voltage power is supplied by a battery or other power source as a BO power source). The flywheel transformer used in television sets (supplied) suppresses distributed capacitance by reducing the number of turns in the primary winding and the number of turns in the secondary winding. Therefore, the voltage generated in the secondary winding (1a) is around 8 volts regardless of the magnitude of the operating voltage, so
In the case of low voltage operation, a capacitor (
Since the ratio of the voltages across C1) becomes large, the above-mentioned disadvantage occurs. Therefore, in carrying out the present invention, it is desirable to apply the present invention to a case where approximately 100 volts or more is supplied as a 10BO power source.
また、コンデンサ(C1)の両端電圧の変化を制御する
ため、コンデンサ(C1)の両端電圧を抵抗でブリーダ
したり、コンデンサ(C1)の容量値を適当に選定する
ことにより、水平振幅変化の補正量をかえることもでき
る。In addition, in order to control changes in the voltage across the capacitor (C1), horizontal amplitude changes can be corrected by bleeding the voltage across the capacitor (C1) with a resistor or by appropriately selecting the capacitance value of the capacitor (C1). You can also change the amount.
第3図乃至第5図はそれぞれ本発明の他の実施例を示し
ており、第2図と同一部分には同一図番を付すとともに
点Aは第2図の点Aに相当することを示している。Figures 3 to 5 each show other embodiments of the present invention, and the same parts as in Figure 2 are given the same figure numbers, and point A corresponds to point A in Figure 2. ing.
第3図の実施例ではコンデンサ(C1)のマイナス側を
アースしており、第4図では整流ダイオード(D2)を
補正巻線(lc)の十BO電源側とコンデンサ(C1)
のマイナス側の接続点との間に配置しており第5図の実
施例では補正巻線(1c)の巻き方向を逆にして補正巻
線(IC)と並列に整流ダイオード(D2)を配置し、
補正巻線(1c)の十BO電源側と前記整流ダイオード
Q)2)のアノード端との間にコンデンサ(C1)を配
置しているが、動作としては嬉2図の実施例の場合と実
質的に同様であるのでその説明は省略する。In the embodiment shown in Fig. 3, the negative side of the capacitor (C1) is grounded, and in Fig. 4, the rectifier diode (D2) is connected to the BO power supply side of the correction winding (LC) and the capacitor (C1).
In the embodiment shown in Fig. 5, the winding direction of the correction winding (1c) is reversed and a rectifier diode (D2) is placed in parallel with the correction winding (IC). death,
A capacitor (C1) is placed between the BO power supply side of the correction winding (1c) and the anode end of the rectifier diode Q)2), but its operation is essentially the same as in the embodiment shown in Figure 2. Since they are essentially the same, their explanation will be omitted.
(へ)効果
本発明の水平振幅変化補正回路は、抵抗を使用せずに水
平の振幅変化が補正できるようにしたので、電力消費を
大幅に削減できる。また、電力消費がほとんどないので
、発熱による回路や基板への悪影響もない。(f) Effects The horizontal amplitude change correction circuit of the present invention is capable of correcting horizontal amplitude changes without using a resistor, so power consumption can be significantly reduced. Furthermore, since there is almost no power consumption, there is no adverse effect on the circuit or board due to heat generation.
第1図は従来の水平振幅変化補正回路を示す図、第2図
は本発明の水平振幅変化補正回路を示す図、第3図、第
4図、第5図はそれぞれ本発明の他の実施例の要部を示
す回路構成図である。
fil・・・フライバックトランス、(la)・・・−
次巻線、(lc)・・・補正巻線、(D2)・・・整流
ダイオード°、(C1)第1図
第2図FIG. 1 is a diagram showing a conventional horizontal amplitude change correction circuit, FIG. 2 is a diagram showing a horizontal amplitude change correction circuit according to the present invention, and FIGS. 3, 4, and 5 are diagrams showing other embodiments of the present invention, respectively. FIG. 3 is a circuit configuration diagram showing main parts of an example. fil...Flyback transformer, (la)...-
Next winding, (lc)... Correction winding, (D2)... Rectifier diode °, (C1) Fig. 1 Fig. 2
Claims (1)
補正巻線に生じたパルスを整流する手段と、該整流手段
の整流電流を受けるコンデンサとを設け、前記コンデン
サの電圧を偏向電源として使用するべく前記コンデンサ
を前記フライバックトランスの一次巻線に接続したこと
を特徴とする水平振幅変化補正回路。+1) The flyback transformer is provided with a correction winding, a means for rectifying the pulse generated in the correction winding, and a capacitor for receiving the rectified current of the rectification means, and the voltage of the capacitor is used as a deflection power source. A horizontal amplitude change correction circuit characterized in that the capacitor is connected to the primary winding of the flyback transformer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22100382A JPS59110276A (en) | 1982-12-15 | 1982-12-15 | Correcting circuit for horizontal amplitude variation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22100382A JPS59110276A (en) | 1982-12-15 | 1982-12-15 | Correcting circuit for horizontal amplitude variation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59110276A true JPS59110276A (en) | 1984-06-26 |
Family
ID=16759943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22100382A Pending JPS59110276A (en) | 1982-12-15 | 1982-12-15 | Correcting circuit for horizontal amplitude variation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59110276A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4572993A (en) * | 1983-12-12 | 1986-02-25 | Rca Corporation | Television deflection circuit with raster width stabilization |
JPS645564U (en) * | 1987-06-30 | 1989-01-12 |
-
1982
- 1982-12-15 JP JP22100382A patent/JPS59110276A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4572993A (en) * | 1983-12-12 | 1986-02-25 | Rca Corporation | Television deflection circuit with raster width stabilization |
JPS645564U (en) * | 1987-06-30 | 1989-01-12 |
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