JPH0431469B2 - - Google Patents
Info
- Publication number
- JPH0431469B2 JPH0431469B2 JP60112428A JP11242885A JPH0431469B2 JP H0431469 B2 JPH0431469 B2 JP H0431469B2 JP 60112428 A JP60112428 A JP 60112428A JP 11242885 A JP11242885 A JP 11242885A JP H0431469 B2 JPH0431469 B2 JP H0431469B2
- Authority
- JP
- Japan
- Prior art keywords
- vertical
- parabolic wave
- voltage
- circuit
- horizontal
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 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
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、投写形の大形テレビジヨン受像機に
用いることのできるラスターの水平ピンクツシヨ
ン歪補正回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a raster horizontal pink distortion correction circuit that can be used in a large projection type television receiver.
従来の技術
従来の水平ピンクツシヨン歪補正回路は第４図
に示す様に、トランジスタTr1〜Tr6を主構成要
素とする二重平衡接続差動増幅回路を用いて、入
力端子１に垂直のこぎり波、入力端子２に水平パ
ラボラ波を入力し、ボリユウムR1，R2の調整に
より第５図ａに示す様な水平周期のパラボラ波が
重畳された垂直のこぎり波形を出力端子３に発生
させ、この波形を図示していないコンバーゼンス
出力回路に入力し、電圧と電流を変換して、図示
していない垂直偏向コイルに第５図ａの様な波形
の電流を流し、ラスター水平ピンクツシヨン歪を
補正するようにしている。なお、第５図ｂは同図
ａの要部の拡大図である。Prior Art As shown in Fig. 4, a conventional horizontal pink tension distortion correction circuit uses a double-balanced differential amplifier circuit whose main components are transistors Tr 1 to Tr 6 , and outputs a vertical sawtooth wave to input terminal 1. , a horizontal parabolic wave is input to the input terminal 2, and by adjusting the volumes R1 and R2 , a vertical sawtooth waveform on which a parabolic wave with a horizontal period is superimposed as shown in Fig. 5a is generated at the output terminal 3, and this waveform is generated at the output terminal 3. The waveform is input to a convergence output circuit (not shown), the voltage and current are converted, and a current with a waveform as shown in Figure 5a is sent to a vertical deflection coil (not shown) to correct raster horizontal pink distortion distortion. I have to. Note that FIG. 5b is an enlarged view of the main part of FIG. 5a.
発明が解決しようとする問題点
ところが従来の技術では、補正波が第５図ａに
示す様に垂直走査期間の前半と後半で対称である
為、垂直偏向コイルに流れる電流も対称となり、
垂直偏向の前半と後半の補正量は同等となる。従
つて第３図ａ，ｂの上図に示す様に、ラスター水
平ピンクツシヨン歪が上下非対称の場合は補正後
も、第３図ａ，ｂの下図に示す様にラスターの上
下のいずれか一方が補正不足となり、歪が残ると
いう欠点を持つ。Problems to be Solved by the Invention However, in the conventional technology, since the correction wave is symmetrical between the first half and the second half of the vertical scanning period as shown in FIG. 5a, the current flowing through the vertical deflection coil is also symmetrical.
The correction amounts for the first half and the second half of the vertical deflection are the same. Therefore, if the raster horizontal pink distortion distortion is vertically asymmetrical, as shown in the upper part of Figure 3 a, b, even after correction, either the top or bottom of the raster will be distorted as shown in the lower part of Figure 3 a, b. This has the disadvantage that the correction is insufficient and distortion remains.
本発明は、この様にして残るラスター水平ピン
クツシヨン歪を補正するものであり、補正後はラ
スターの全域で真つすぐな水平ラインが得られる
補正回路を提供するものである。 The present invention corrects the raster horizontal pink distortion that remains in this way, and provides a correction circuit that can obtain straight horizontal lines over the entire raster area after correction.
問題点を解決するための手段
本発明によるピンクツシヨン歪補正回路は上記
目的を達成するため、水平パラボラ波と重畳され
る垂直のこぎり波に、ボリユウムを通して垂直の
パラボラ波を合成するようにしたことを特徴とす
る。Means for Solving the Problems In order to achieve the above object, the pink tension distortion correction circuit according to the present invention is characterized in that a vertical parabolic wave is synthesized through a volume into a vertical sawtooth wave superimposed on a horizontal parabolic wave. shall be.
作 用
本発明によれば、垂直のこぎり波にボリユウム
を介して垂直パラボラ波を合成することにより、
上記ボリユウムの調整でもつて垂直走査期間の前
半と後半とで水平パラボラ波の波高値を変えるこ
とができ、ラスター全体にわたつて正確にピンク
ツシヨン歪の補正が可能となる。Effect According to the present invention, by synthesizing a vertical parabolic wave with a vertical sawtooth wave through a volume,
By adjusting the volume described above, the peak value of the horizontal parabolic wave can be changed between the first half and the second half of the vertical scanning period, making it possible to accurately correct the pink tension distortion over the entire raster.
実施例
以下、本発明の一実施例を第１図、第２図、第
３図を用いて説明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.
第１図において、第４図と異なる点は、第４図
に示す従来のラスター水平ピンクツシヨン歪補正
波発生回路のボリユウムR1の両端にボリユウム
R11を並列に接続し、このボリユウムR11の可動
端子にコンデンサC4を介して垂直パラボラ波入
力端子４を接続し、この入力端子４よりコンデン
サC4を通して垂直パラボラ波を入力するように
した点である。なお、第１図において、ボリユウ
ムＲ１１は調整用ボリユウム、トランジスタTr
１〜Tr４からなる回路は垂直パラボラ波電圧に
垂直のこぎり波電圧を重畳する第１の回路手段、
トランジスタTr５およびTr６からなる回路は前
記重畳波に水平パラボラ波を乗算する第２の回路
手段、ならびにボリユウムＲ１〜Ｒ２からなる回
路は前記第１および第２の回路手段の入力端子の
バイアス電圧をそれぞれ調整する入力バイアス電
圧調整回路を形成している。これにより差動増幅
器Tr1，Tr4とTr2，Tr3のベース間には垂直のこ
ぎり波と垂直パラボラ波が合成された波形が入力
されることになり、出力端子３には垂直走査期間
の前半と後半とで入力端子２より入力される水平
パラボラ波の波高値が異なる波形が出力される。
この出力波形は垂直走査期間の前半と後半の水平
パラボラ波の波高値のレベル比をボリユウムR11
で調整出来、第２図ａ，ｂ，ｃに示す３種類の波
形が得られる。 The difference between FIG. 1 and FIG. 4 is that the conventional raster horizontal pink distortion correction wave generation circuit shown in FIG .
R 11 were connected in parallel, and the vertical parabolic wave input terminal 4 was connected to the movable terminal of this volume R 11 via a capacitor C 4, and the vertical parabolic wave was input from this input terminal 4 through the capacitor C 4 . It is a point. In FIG. 1, the volume R11 is an adjustment volume and a transistor Tr.
The circuit consisting of Tr 1 to Tr 4 is a first circuit means for superimposing a vertical sawtooth voltage on a vertical parabolic wave voltage;
A circuit consisting of transistors Tr5 and Tr6 serves as a second circuit means for multiplying the superimposed wave by a horizontal parabolic wave, and a circuit consisting of volumes R1 and R2 adjusts the bias voltage at the input terminals of the first and second circuit means, respectively. An input bias voltage adjustment circuit is formed. As a result, a waveform in which a vertical sawtooth wave and a vertical parabolic wave are combined is input between the bases of differential amplifiers Tr 1 and Tr 4 and Tr 2 and Tr 3 , and a waveform that is a combination of a vertical sawtooth wave and a vertical parabolic wave is input to the output terminal 3. Waveforms with different peak values of the horizontal parabolic waves input from the input terminal 2 are output in the first half and the second half.
This output waveform is the level ratio of the peak values of the horizontal parabolic waves in the first half and the second half of the vertical scanning period .
The three types of waveforms shown in Fig. 2 a, b, and c can be obtained.
従来の様に、第２図ｂに示す垂直走査期間の前
半と後半で対称な波形を用いて、ラスター水平ピ
ンクツシヨン歪を補正した場合、第３図ａに示す
様に、垂直走査の後半が補正不足となり歪が残る
時は、第１図の端子３より出力される出力波形を
ボリユウムR11を調整して第２図ｃの様に垂直走
査期間の前半で波高値が低く、後半で高い波形に
し、垂直走査の前半より後半の垂直偏向量を大き
くする事により、又、同様な手順で、第３図ｂに
示す様に、垂直走査の前半が補正不足となり歪が
残る時は、第１図の出力端子３の出力波形を第２
図ａの様な波形にし、垂直走査の後半より前半の
垂直偏向量を大きくする事で、それぞれラスター
の全域で真つすぐな水平線に補正出来る。 If, as in the past, raster horizontal pink distortion distortion is corrected using symmetrical waveforms in the first and second half of the vertical scanning period as shown in Figure 2b, the second half of the vertical scanning period is corrected as shown in Figure 3a. If there is insufficient distortion and distortion remains, adjust the volume R11 of the output waveform output from terminal 3 in Figure 1 to create a waveform in which the peak value is low in the first half of the vertical scanning period and high in the second half, as shown in Figure 2 c. By increasing the amount of vertical deflection in the latter half of the vertical scanning than in the first half, or by using the same procedure as shown in Figure 3b, if the first half of the vertical scanning is insufficiently corrected and distortion remains, the first The output waveform of output terminal 3 in the figure is
By creating a waveform as shown in Figure A and increasing the amount of vertical deflection in the first half of the vertical scan compared to the latter half, it is possible to correct the entire raster area to a straight horizontal line.
なお、実際には第１図に示す出力端子３より取
り出されるラスター水平ピンクツシヨン歪補正波
を、垂直偏向コイルに偏向電流を流す為のコンバ
ーゼンス出力回路（いずれも図示せず）に入力
し、出力端子３に発生する電圧波形と同波形の電
流を垂直偏向コイルに流す。 Actually, the raster horizontal pink distortion correction wave taken out from the output terminal 3 shown in Fig. 1 is input to a convergence output circuit (none of which is shown) for passing a deflection current to the vertical deflection coil, and then output from the output terminal. A current having the same waveform as the voltage waveform generated in step 3 is passed through the vertical deflection coil.
発明の効果
以上のように本発明によれば、垂直パラボラ
波、垂直のこぎり波、水平パラボラ波を用いるこ
とによりラスター水平ピンクツシヨン歪を、ラス
ターの全域で真つすぐな水平線に補正する事が出
来る。Effects of the Invention As described above, according to the present invention, by using a vertical parabolic wave, a vertical sawtooth wave, and a horizontal parabolic wave, raster horizontal pink tension distortion can be corrected to a straight horizontal line over the entire raster area.
第１図は本発明の一実施例におけるピンクツシ
ヨン歪補正回路の回路図、第２図ａ，ｂ，ｃは第
１図の動作説明のための出力波形図、第３図はラ
スター水平ピンクツシヨン歪を補正した場合のラ
スターの変化を示す図、第４図は従来例の回路
図、第５図ａ，ｂは第４図の動作説明のための波
形図である。
１……垂直のこぎり波入力端子、２……水平パ
ラボラ波入力端子、４……垂直パラボラ波入力端
子、R1，R2，R11……ボリユウム、Tr1，Tr2，
Tr3，Tr4，Tr5，Tr6……トランジスタ。
Fig. 1 is a circuit diagram of a pink-tension distortion correction circuit according to an embodiment of the present invention, Fig. 2 a, b, and c are output waveform diagrams for explaining the operation of Fig. 1, and Fig. 3 shows a raster horizontal pink-tension distortion correction circuit. FIG. 4 is a circuit diagram of a conventional example, and FIGS. 5a and 5b are waveform diagrams for explaining the operation of FIG. 4. 1...Vertical sawtooth wave input terminal, 2...Horizontal parabolic wave input terminal, 4...Vertical parabolic wave input terminal, R1 , R2 , R11 ...Volume, Tr1 , Tr2 ,
Tr 3 , Tr 4 , Tr 5 , Tr 6 ...transistor.
Claims (1)
動端子に入力される調整用ボリユウムと、 前記調整用ボリユウムの両端より得られる垂直
パラボラ波電圧に、前記垂直のこぎり波電圧を重
畳するための第１の回路手段と、 前記第１の回路手段に接続され、前記垂直パラ
ボラ波電圧と前記垂直のこぎり波電圧との重畳波
に、水平パラボラ波を乗算するための第２の回路
手段と、 前記第１の回路手段と第２の回路手段の入力端
子の各バイアス電圧を、それぞれ調整するための
入力バイアス電圧調整回路とを備え、 前記第１の回路手段で重畳された垂直パラボラ
波電圧と垂直のこぎり波電圧との重畳波に、水平
パラボラ波を前記第２の回路手段で乗算し、前記
調整用のボリユウムにより垂直走査期間の前半と
後半とで水平パラボラ波電圧の波高値を変え得る
ようにするとともに、前記入力バイアス電圧調整
回路で垂直走査期間の前半と後半に対する割合を
調整することができるように構成したことを特徴
とするピンクツシヨン歪み補正回路。[Claims] 1. An adjustment volume into which a vertical parabolic wave voltage is input to a movable terminal via a capacitor, and the vertical sawtooth voltage is superimposed on the vertical parabolic wave voltage obtained from both ends of the adjustment volume. a second circuit means connected to the first circuit means for multiplying a superimposed wave of the vertical parabolic wave voltage and the vertical sawtooth voltage by a horizontal parabolic wave; , an input bias voltage adjustment circuit for adjusting respective bias voltages of input terminals of the first circuit means and the second circuit means, and vertical parabolic wave voltages superimposed by the first circuit means. and the vertical sawtooth voltage are multiplied by the horizontal parabolic wave by the second circuit means, and the peak value of the horizontal parabolic wave voltage can be changed between the first half and the second half of the vertical scanning period using the adjustment volume. A pink tension distortion correction circuit characterized in that the input bias voltage adjustment circuit is configured to be able to adjust the ratio between the first half and the second half of the vertical scanning period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11242885A JPS61269571A (en) | 1985-05-24 | 1985-05-24 | Pincushion distortion correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11242885A JPS61269571A (en) | 1985-05-24 | 1985-05-24 | Pincushion distortion correction circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61269571A JPS61269571A (en) | 1986-11-28 |
| JPH0431469B2 true JPH0431469B2 (en) | 1992-05-26 |
Family
ID=14586393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11242885A Granted JPS61269571A (en) | 1985-05-24 | 1985-05-24 | Pincushion distortion correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61269571A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4330416Y1 (en) * | 1968-06-10 | 1968-12-12 | ||
| JPS5326613A (en) * | 1976-08-25 | 1978-03-11 | Hitachi Ltd | Upper/lower pincushion distortion correction circuit |
| JPS551080U (en) * | 1979-05-25 | 1980-01-07 |
-
1985
- 1985-05-24 JP JP11242885A patent/JPS61269571A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4330416Y1 (en) * | 1968-06-10 | 1968-12-12 | ||
| JPS5326613A (en) * | 1976-08-25 | 1978-03-11 | Hitachi Ltd | Upper/lower pincushion distortion correction circuit |
| JPS551080U (en) * | 1979-05-25 | 1980-01-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61269571A (en) | 1986-11-28 |
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