JPH01123574A - Bilateral bobbin distortion correcting circuit - Google Patents

Bilateral bobbin distortion correcting circuit

Info

Publication number
JPH01123574A
JPH01123574A JP28170687A JP28170687A JPH01123574A JP H01123574 A JPH01123574 A JP H01123574A JP 28170687 A JP28170687 A JP 28170687A JP 28170687 A JP28170687 A JP 28170687A JP H01123574 A JPH01123574 A JP H01123574A
Authority
JP
Japan
Prior art keywords
supply voltage
vcc
amplifier
horizontal deflection
power supply
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
JP28170687A
Other languages
Japanese (ja)
Inventor
Hiroyuki Nakayama
裕之 中山
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP28170687A priority Critical patent/JPH01123574A/en
Publication of JPH01123574A publication Critical patent/JPH01123574A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To obtain a good image without lateral bobbin distortion by regarding the mean value of supply voltage as a gain control signal and automatically controlling the gain of an amplifier. CONSTITUTION:When horizontal deflection frequency fH is changed like fH 1-fE 3, in proportion to that, the supply voltage Vcc is also changed like Vcc 1-Vcc 3. The changed supply voltage Vcc 1-Vcc 3 is integrated by an integrating circuit 12, the mean value of that is inputted to the amplifier 11 as the control signal (gs) and the gain of the amplifier is controlled by it. That means, the size of the modulated wave form of parabola voltage is automatically changed by raising the gain of the amplifier 11 when the supply voltage Vcc is high and lowering the gain of the amplifier 11 when the supply voltage Vcc is low. Thus, proper correction quantity can be always obtained regardless of the change of the horizontal deflection frequency fH.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、各種のデイスプレィモニタとして用いられ
る受像管の画面の左右方向に走査される電子ビームを偏
向させる際、画面の周辺になるほど偏向中心からの距離
が大きいことに原因して画面中央部での水平振幅が不足
して発生する左右糸巻きひずみを、水平偏向コイルに流
れるのこぎり波電流に垂直周期のパラボラ電流を重畳す
ることにより補正する左右糸巻きひずみ補正回路に関す
るものである。
[Detailed Description of the Invention] [Industrial Application Field] This invention provides a method for deflecting an electron beam that is scanned in the horizontal direction of the screen of a picture tube used as a variety of display monitors. The left-right pincushion distortion caused by insufficient horizontal amplitude at the center of the screen due to the large distance from the center is corrected by superimposing a parabolic current with a vertical period on the sawtooth current flowing through the horizontal deflection coil. This relates to a left and right pincushion distortion correction circuit.

[従来の技術1 第3図は従来の左右糸巻きひずみ補正回路の構成図であ
り、同図において、(1)は水平偏向コイル、(2)は
共振コンデンサ、(3)はダンパダイオード、(4)は
水平出力トランジスタ、(5)は8字補正コンデンサで
、これら構成要素(1)〜(5)により上記水平偏向コ
イル(1)にのこぎり波電流を供給する水平出力回路(
B)を構成している。
[Prior art 1] Figure 3 is a block diagram of a conventional left and right pincushion distortion correction circuit. In the figure, (1) is a horizontal deflection coil, (2) is a resonant capacitor, (3) is a damper diode, and (4) ) is a horizontal output transistor, (5) is a figure-8 correction capacitor, and these components (1) to (5) form a horizontal output circuit (
B).

(7)は回路動作用の可変電源で、可変抵抗(8)の調
整によりその電源電圧(Vcc)を可変としている。(
9)はフライバックトランスの1次巻線であるチョーク
・コイル、(10)は変調波形発生器で、上記の可変電
源電圧(Vcc)に垂直周期のパラボラ波形電圧を重畳
することによりチョークコイル(9)を通じて上記水平
偏向コイル(1)に流れる電流を垂直周期のパラボラ電
流で変調する。
(7) is a variable power supply for circuit operation, and its power supply voltage (Vcc) is made variable by adjusting a variable resistor (8). (
9) is a choke coil which is the primary winding of the flyback transformer, and (10) is a modulation waveform generator, which generates a choke coil ( 9) modulates the current flowing to the horizontal deflection coil (1) with a parabolic current having a vertical period.

つぎに、上記構成の動作について説明する。Next, the operation of the above configuration will be explained.

図示していない水平ドライブ回路からの出力パルス(a
、)を水平出力回路(6)の水平出力トランジスタ(4
)のベースに印加すると、この水平出力トランジスタ(
4)のスイッチング動作と、ダンパダイオード(3)の
オン・オフ動作と、水平偏向コイル(1)のインダクタ
ンス(LH)および共振コンデンサ(2)の充放電とに
よる共振現象を利用して、上記水平偏向コイ゛ル(1)
にのこぎり被電流が流れる。このままであると、水平振
幅の不足に起因して第5図で示すように、CRTの画面
中央部に左右糸巻きひずみ(S)が生じる。このとき、
可変電源(7)における電源電圧(Vcc)に変調波形
発生器(10)から第4図(A)で示すような垂直周期
のパラボラ波形電圧を重畳することにより、第4図(B
)で示すように変調された波形の電圧(Vcc)を供給
して、上記水平偏向コイル(1)に流れる電流(1)が
第6図で示すように垂直周期のパラボラ電流で変調した
波形となり、これにより画面上の左右糸巻きひずみが補
正される。
Output pulse (a) from a horizontal drive circuit (not shown)
) of the horizontal output transistor (4) of the horizontal output circuit (6).
) to the base of this horizontal output transistor (
The above horizontal Deflection coil (1)
A current flows through the saw. If this continues, left-right pincushion distortion (S) will occur in the center of the CRT screen, as shown in FIG. 5, due to insufficient horizontal amplitude. At this time,
By superimposing a parabolic waveform voltage with a vertical period as shown in FIG. 4(A) from the modulation waveform generator (10) on the power supply voltage (Vcc) in the variable power source (7), the voltage as shown in FIG.
), the current (1) flowing through the horizontal deflection coil (1) becomes a waveform modulated by a vertically periodic parabolic current as shown in Figure 6. , this corrects the left and right pincushion distortion on the screen.

つまり、偏向コイル(1)の電流(Id)の最大値(I
d■ax)は電源電圧を(Vcc) 、水平偏向周波数
を(f)l)、偏向コイル(1)のインダクタンスを(
L II )とする場合。
In other words, the maximum value (I
d■ax) is the power supply voltage (Vcc), the horizontal deflection frequency (f)l), and the inductance of the deflection coil (1) (
L II).

Id(wax)匈Vcc−(2・LH−fH)−’であ
る。したがって、電源電圧(Vcc)を垂直周期で変調
することにより左右糸巻きひずみは補正される。
Id(wax)匈Vcc-(2・LH-fH)-'. Therefore, the left-right pincushion distortion can be corrected by modulating the power supply voltage (Vcc) in a vertical period.

ところで、水平偏向周波数(fH)か一定の通常のデイ
スプレィモニタの場合であれば、上記したように電源電
圧(Vcc)を垂直周期で変調することにより左右糸巻
きひずみを所定どおりに補正することができるが、多様
な水平偏向周波数(fH)を使用するデイスプレィモニ
タの場合、適正な補正量が得られなくなる。
By the way, in the case of a normal display monitor where the horizontal deflection frequency (fH) is constant, it is possible to correct the left and right pincushion distortion as specified by modulating the power supply voltage (Vcc) with a vertical period as described above. However, in the case of display monitors that use various horizontal deflection frequencies (fH), it becomes impossible to obtain an appropriate amount of correction.

すなわち、水平偏向周波数か(fHI)の場合、偏向コ
イル(1)の最大電流値 1dl(wax) = 1 
 としてCRT画面上の水平振幅が適正であるとすると
、このときの電源電圧(Vccl)は、Vccl = 
2・LH−fill #Tとなる。
That is, in the case of horizontal deflection frequency (fHI), maximum current value of deflection coil (1) 1 dl (wax) = 1
Assuming that the horizontal amplitude on the CRT screen is appropriate, the power supply voltage (Vccl) at this time is Vccl =
2.LH-fill becomes #T.

この状態で、水平偏向周波数(fH)を(fH)から(
ftl2) (ただし、fH2) fH)に変化させる
と、そのときの最大電流値(Id2 wax)は上記(
fHl)のときの最大電流値(1)に対して、 Id2
 (+5ax)clとなり、したがって適正な水平振幅
とならない。よって、水平偏向周波数(ftl)を変化
させた場合、電源電圧(Vcc)を変化させる必要があ
る。
In this state, change the horizontal deflection frequency (fH) from (fH) to (
ftl2) (however, fH2) fH), the maximum current value (Id2 wax) at that time will be the above (
For the maximum current value (1) when fHl), Id2
(+5ax)cl, and therefore the horizontal amplitude is not appropriate. Therefore, when changing the horizontal deflection frequency (ftl), it is necessary to change the power supply voltage (Vcc).

つまり、水平偏向周波数が(fH2)のとき、Vcc2
 = 2・L)l−f)12 ・I > Vcclとし
、また水平偏向周波数が(fH3)のとき。
In other words, when the horizontal deflection frequency is (fH2), Vcc2
= 2・L)l−f)12・I>Vccl and when the horizontal deflection frequency is (fH3).

Vcc:l  *  2・ LH−fHl3  *  
I  >  Vcc2  )  Vcclとする必要が
生じる。
Vcc:l*2・LH-fHl3*
I>Vcc2) It becomes necessary to set Vccl.

第4図(B3は水平偏向周波数(fH)を種々変化させ
たときの必要電源電圧(Vcc)を示す。
FIG. 4 (B3 shows the required power supply voltage (Vcc) when the horizontal deflection frequency (fH) is variously changed.

[発明が解決しようとする問題点1 以上のように構成された従来の左右糸巻きひずみ補正回
路によれば、水平偏向周波数や水平偏向幅を変化させた
場合、適正な補正量が得られなくなるといった問題があ
った。
[Problem to be Solved by the Invention 1] According to the conventional left and right pincushion distortion correction circuit configured as described above, when the horizontal deflection frequency or the horizontal deflection width is changed, an appropriate correction amount cannot be obtained. There was a problem.

この発明は上記のような問題点を解消するためになされ
たもので、多様な水平偏向周波数、水平偏向幅に対して
常に適正な補正量を得ることができる左右糸巻きひずみ
補正回路を提供することを目的とする。
This invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a left-right pincushion distortion correction circuit that can always obtain an appropriate correction amount for various horizontal deflection frequencies and horizontal deflection widths. With the goal.

[問題点を解決するための手段] この発明にかかる左右糸巻きひずみ補正回路は、電源電
圧をパラボラ波形電圧に変調するための変調波形発生器
と電源との間にゲインコントロール可能な増幅器を介挿
し、かつ電源電圧の平均値をゲインコントロール信号と
して上記増幅器のゲインを自動コントロールするように
なしたことを特徴とする。
[Means for Solving the Problems] The left and right pincushion distortion correction circuit according to the present invention includes a gain-controllable amplifier inserted between the modulation waveform generator and the power supply for modulating the power supply voltage into a parabolic waveform voltage. , and the gain of the amplifier is automatically controlled using the average value of the power supply voltage as a gain control signal.

[作用] この発明によれば、水平偏向周波数の増減変化にともな
って電源電圧も比例的に増減変化する。
[Operation] According to the present invention, as the horizontal deflection frequency increases or decreases, the power supply voltage also increases or decreases proportionally.

このように変化する電源電圧が積分され、その平均値が
コントロール信号として増幅器に入力されて、電源電圧
の高いときゲインが上がり、電源電圧の低いときゲイン
が下がって、パラボラ電圧の変調波形が自動的に大小に
変化する。
The power supply voltage that changes in this way is integrated, and its average value is input to the amplifier as a control signal.When the power supply voltage is high, the gain increases, and when the power supply voltage is low, the gain decreases, and the parabolic voltage modulation waveform is automatically adjusted. change in size.

[発明の実施例] 以下、この発明の一実施例を図面にもとづいて説明する
[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.

第1図はこの発明の一実施例による左右糸巻きひずみ補
正回路の構成図であり、同図において。
FIG. 1 is a block diagram of a left and right pincushion distortion correction circuit according to an embodiment of the present invention.

第3図で示す従来例と同一の構成には同一の符号を付し
てそれらの説明を省略する。
Components that are the same as those of the conventional example shown in FIG. 3 are given the same reference numerals, and their explanation will be omitted.

第1図においそ、(11)はゲインコントロール可能な
増幅器で、変調波形発生器(10)と可変電源(7)と
の間に介挿する。 (12)は積分回路で、抵抗(13
)とコンデンサ(10とからなり、かつ電源電圧(Vc
c)を積分してその平均値をコントロール信号(gs)
とし、上記増幅器(11)に入力する。
In FIG. 1, (11) is an amplifier whose gain can be controlled, and is inserted between the modulation waveform generator (10) and the variable power supply (7). (12) is an integrating circuit, and the resistor (13
) and a capacitor (10), and the power supply voltage (Vc
c) and its average value as the control signal (gs)
and input it to the amplifier (11).

つぎに、上記構成の動作について説明する。Next, the operation of the above configuration will be explained.

水平出力回路(8)の水平出力トランジスタ(4)のベ
ースに水平ドライブ回路から出力パルス(a)を印加し
て水平偏向コイル(1)にのこぎり波電流を流し、その
ときにCRTの画面中央部に生じる左右糸巻きひずみを
、電源電圧(Vcc)に垂直周期のパラボラ波形電圧を
重畳することで補正するまての動作は従来例で説明した
とおりである。
An output pulse (a) is applied from the horizontal drive circuit to the base of the horizontal output transistor (4) of the horizontal output circuit (8), causing a sawtooth wave current to flow through the horizontal deflection coil (1). The operation of correcting the left-right pincushion distortion caused by the power supply voltage (Vcc) by superimposing a parabolic waveform voltage with a vertical period is as described in the conventional example.

以上のような左右糸巻きひずみ補正動作時において、水
平偏向周波数(f)l)を(fHl)〜(f)!3)の
ごとく変更させると、それに比例して第2図(C)で示
すように電源電圧(Vcc)も(Vccl)〜(Vcc
3)のごとく変化する。この変化した電源電圧(Vea
l)〜(Vcc:I)が積分回路(12)において積分
されてそのモ均値がコントロール信号(gs)として増
幅器(11)に人力されてゲインをコントロールする。
During the horizontal pincushion distortion correction operation as described above, the horizontal deflection frequency (f)l) is set to (fHl) to (f)! 3), the power supply voltage (Vcc) also changes proportionally from (Vccl) to (Vcc) as shown in Figure 2 (C).
3) Changes as shown below. This changed power supply voltage (Vea
l) to (Vcc:I) are integrated in an integrating circuit (12), and the average value thereof is input to an amplifier (11) as a control signal (gs) to control the gain.

つまり、電源電圧CVCC)か高いとき増幅器(11)
のゲインを上昇させ、かつ電源電圧(Vcc)か低いと
き増幅器(11)のゲインを下降させて、第2図(8)
で示すようにパラボラ電圧の変調波形を・自動的に大小
に変化させ、これにより水平偏向周波数(f)l)の変
化にかかわらず常に適正な補正量が得られる。
In other words, when the power supply voltage (CVCC) is high, the amplifier (11)
By increasing the gain of the amplifier (11) and decreasing the gain of the amplifier (11) when the power supply voltage (Vcc) is low, as shown in Fig. 2 (8)
As shown in the figure, the modulation waveform of the parabolic voltage is automatically changed in magnitude, thereby making it possible to always obtain an appropriate amount of correction regardless of changes in the horizontal deflection frequency (f).

[発明の効果] 以上のように、この発明によれば、水平偏向周波数や偏
向幅の変化に対応して、左右糸巻きひずみ補正のための
パラボラ電圧波形の大きさを自動的に調整することがで
きるから、多様な水平偏向周波数、偏向幅を使用するデ
イスプレィモニタの場合においても、常に適正な補正量
を得ることができ、左右糸巻きひずみの発生しない良好
な画像を再現させることができるといった効果を奏する
[Effects of the Invention] As described above, according to the present invention, the magnitude of the parabolic voltage waveform for correcting left-right pincushion distortion can be automatically adjusted in response to changes in the horizontal deflection frequency and deflection width. Because of this, even in the case of display monitors that use a variety of horizontal deflection frequencies and deflection widths, it is possible to always obtain an appropriate amount of correction and reproduce good images without left-right pincushion distortion. play.

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

第1図はこの発明の一実施例による左右糸巻きひずみ補
正回路の構成図、第2図は各部の波形図、第3図は従来
の左右糸巻きひずみ補正回路の構成図、第4図は第3図
の各部の波形図、第5図は左右糸巻きひずみの発生状況
を示す画面の正面図、第6図は左右糸巻きひずみの補正
電流を示す説明図である。 (1)・・・水モ偏向コイル、(2)・・・共振コント
ロール、(3)・・・ダンパダイオード、(4)・・・
水平出力トランジスタ、(6)・・・水平出力回路、(
7)・・・可変電源、 (10)・・・変調波形発生器
、(11)・・・増幅器、(+2)−・・積分回路。 なお、図中の同一符号は同一または相当部分を示す。
FIG. 1 is a block diagram of a left and right pincushion distortion correction circuit according to an embodiment of the present invention, FIG. 2 is a waveform diagram of each part, FIG. 3 is a block diagram of a conventional left and right pincushion distortion correction circuit, and FIG. FIG. 5 is a front view of the screen showing the occurrence of left and right pincushion distortion, and FIG. 6 is an explanatory diagram showing the correction current for left and right pincushion distortion. (1)... Water deflection coil, (2)... Resonance control, (3)... Damper diode, (4)...
Horizontal output transistor, (6)...Horizontal output circuit, (
7)...Variable power supply, (10)...Modulation waveform generator, (11)...Amplifier, (+2)-...Integrator circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] (1)水平偏向コイルと、この水平偏向コイルにのこぎ
り波電流を供給する水平出力回路と、回路動作用の可変
電源と、その電源電圧に垂直周期のパラボラ波形電圧を
重畳することにより上記水平偏向コイルに流れる電流を
垂直周期のパラボラ電流で変調する変調波形発生器とを
具備した左右糸巻きひずみ補正回路において、上記変調
波形発生器と電源とのあいだに介挿したゲインコントロ
ール可能な増幅器と、上記電源電圧の平均値を上記増幅
器のゲインコントロール信号として入力する積分回路と
を備えたことを特徴とする左右糸巻きひずみ補正回路。
(1) A horizontal deflection coil, a horizontal output circuit that supplies a sawtooth current to the horizontal deflection coil, a variable power supply for circuit operation, and the horizontal deflection by superimposing a parabolic waveform voltage with a vertical period on the power supply voltage. A left/right pincushion distortion correction circuit equipped with a modulation waveform generator that modulates the current flowing through the coil with a parabolic current having a vertical period; A left-right pincushion distortion correction circuit comprising: an integrating circuit that inputs an average value of power supply voltage as a gain control signal for the amplifier.
JP28170687A 1987-11-07 1987-11-07 Bilateral bobbin distortion correcting circuit Pending JPH01123574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28170687A JPH01123574A (en) 1987-11-07 1987-11-07 Bilateral bobbin distortion correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28170687A JPH01123574A (en) 1987-11-07 1987-11-07 Bilateral bobbin distortion correcting circuit

Publications (1)

Publication Number Publication Date
JPH01123574A true JPH01123574A (en) 1989-05-16

Family

ID=17642845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28170687A Pending JPH01123574A (en) 1987-11-07 1987-11-07 Bilateral bobbin distortion correcting circuit

Country Status (1)

Country Link
JP (1) JPH01123574A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519447A (en) * 1993-10-28 1996-05-21 Mitsubishi Denki Kabushiki Kaisha Wide aspect television receiver including a correcting waveform signal generator
CN102645531A (en) * 2012-04-06 2012-08-22 上海蓝怡科技有限公司 Method for marking antibody by using alkaline phosphatase

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184971A (en) * 1984-10-03 1986-04-30 Matsushita Electric Ind Co Ltd Horizontal deflecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184971A (en) * 1984-10-03 1986-04-30 Matsushita Electric Ind Co Ltd Horizontal deflecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519447A (en) * 1993-10-28 1996-05-21 Mitsubishi Denki Kabushiki Kaisha Wide aspect television receiver including a correcting waveform signal generator
CN102645531A (en) * 2012-04-06 2012-08-22 上海蓝怡科技有限公司 Method for marking antibody by using alkaline phosphatase

Similar Documents

Publication Publication Date Title
JPH0317273B2 (en)
JPH0228947B2 (en)
JPS59178078A (en) Display unit
JPS61142869A (en) Raster range adjustor
US5357175A (en) Deflection and high voltage circuit
JP3036744B2 (en) Deflection device
JPH01123574A (en) Bilateral bobbin distortion correcting circuit
JPS6363284A (en) Line deflection circuit
JPH0433193B2 (en)
GB2135859A (en) Picture size control circuit
US4691147A (en) Circuit arrangement for correcting horizontal pincushion distortion using a voltage proportional to vertical sync period
JPH06337649A (en) Deflection device of raster- scanning type cathode ray tube display
JPH0793691B2 (en) Television receiver
US3980821A (en) Power supply for a television receiver
JP3785385B2 (en) Deflection device
JP3139530B2 (en) Horizontal deflection high voltage generation circuit
JPH08340460A (en) Switching clamping circuit
JPS63281571A (en) Horizontal deflecting circuit
JPH0441658Y2 (en)
JPS6184971A (en) Horizontal deflecting device
JPH0523017Y2 (en)
GB2325601A (en) Horizontal width regulation circuit for a CRT display
JP3285409B2 (en) Television receiver
JP3699144B2 (en) Wide screen TV image distortion correction method
JP2528481B2 (en) Left and right pincushion distortion correction circuit