JPH01169853A - Convergence device - Google Patents
Convergence deviceInfo
- Publication number
- JPH01169853A JPH01169853A JP32699387A JP32699387A JPH01169853A JP H01169853 A JPH01169853 A JP H01169853A JP 32699387 A JP32699387 A JP 32699387A JP 32699387 A JP32699387 A JP 32699387A JP H01169853 A JPH01169853 A JP H01169853A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- core
- projections
- axis
- uniform
- 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
- 238000013459 approach Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000010894 electron beam technology Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 241000226585 Antennaria plantaginifolia Species 0.000 description 2
- 241001057181 Orcus Species 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Details Of Television Scanning (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は一電子銃の陰極−管に装着するコンバーゼンス
装置に係）、特にフォーカス性能の好適なコンバーゼン
ス装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a convergence device attached to a cathode tube of an electron gun, and particularly to a convergence device with suitable focusing performance.
投与型のカラーテレビや、力２−デイスプレィでは、−
電子銃の陰極線管を複数本用いて、鏡やＶンズ等の光学
系を介して投写スクリーンに各単色の１ｌＪＩ極線管映
像を投写し、カラー画面を形成する。この際、投写スク
リーン上に表われる映像をまそのまま何も補正しなけれ
ば均−凪界方式の偏向ヨー“りを使用していることや、
光学系を介して投写するために、糸巻歪やキーストン歪
が現われる。In dose-type color televisions and power 2-displays, -
Using a plurality of cathode ray tubes of an electron gun, each monochromatic 11JI cathode ray tube image is projected onto a projection screen via an optical system such as a mirror or a V lens, thereby forming a color screen. At this time, if the image displayed on the projection screen is not corrected in any way, the deflection yaw of the uniform-calm field method is used.
Because the image is projected through an optical system, pincushion distortion and keystone distortion appear.
この歪を補正するために偏向ヨークの電子銃側後部に水
平方向及び垂直方向の２億磁界を発生する４極のコンバ
ーゼンス装置を設置していた。この装置のコア形状はリ
ング状部分と上下左右の棚上位置で内側に突出した長方
形の４個のコア突起とから成シ、各突起に巻かれたコイ
ルに外部回路から偏向電流に同期した補正電流を流し、
上記水平軸もしくは垂直軸上の２個の突起の間に２億磁
界を発生して、電子ビームに水平および垂直方向の偏向
力を作用させて上記歪を補正していた。In order to correct this distortion, a four-pole convergence device was installed at the rear of the deflection yoke on the electron gun side to generate 200 million magnetic fields in the horizontal and vertical directions. The core shape of this device consists of a ring-shaped part and four rectangular core protrusions that protrude inward at the upper, lower, left, and right shelf positions, and a coil wound around each protrusion receives correction synchronized with the deflection current from an external circuit. pass a current,
A 200 million magnetic field was generated between the two protrusions on the horizontal or vertical axis to apply horizontal and vertical deflection forces to the electron beam to correct the distortion.
また、実公昭５８−３２３７８号公報の記載例のように
、上記水平、垂直軸上の第１のコア突起と、第１のコア
突起間の中間角度位置に４個の第２のコア突起を設け、
第１のコア突起に巻線しにコイルによりダイナミックな
補正を行い、水平あるいは垂直方向の磁界を発生するよ
うに第２のコア突起に巻線した補助コイルに、前記外部
回路とは異なる回路から直流電流を流してスタティック
な補正を行うように構成した例がある。Further, as in the example described in Japanese Utility Model Publication No. 58-32378, the first core protrusions on the horizontal and vertical axes and four second core protrusions are provided at intermediate angular positions between the first core protrusions. established,
A circuit different from the external circuit is connected to an auxiliary coil wound around the second core projection so as to dynamically correct the coil wound around the first core projection and generate a horizontal or vertical magnetic field. There is an example of a configuration in which static correction is performed by flowing a direct current.
上記従来技術では、ダイナミックなコンバーゼンス補正
を行うコア形状は水平、垂直軸上に対向したコア突起ｔ
−１組ずつ用いている。このため、第６図に示すように
２個のコア突起２５間に発生する磁界はバレル状の磁界
２６となっている。第７図は従来コンバーゼンスヨーク
３１の軸上磁界強１Ｂｏ２８と非均−磁界成分Ｂ、２９
をグラフ化したものである。このとき水平偏向磁界の鏡
面対称軸（Ｘ軸）上における愚速密度Ｂｙは次式で表さ
れる。In the above conventional technology, the core shape for dynamic convergence correction has core protrusions t opposed on the horizontal and vertical axes.
-One set is used. Therefore, as shown in FIG. 6, the magnetic field generated between the two core protrusions 25 is a barrel-shaped magnetic field 26. Figure 7 shows the axial magnetic field strength 1Bo28 and non-uniform magnetic field components B and 29 of the conventional convergence yoke 31.
This is a graph. At this time, the velocity density By on the mirror symmetry axis (X-axis) of the horizontal deflection magnetic field is expressed by the following equation.
ＢＰ”Ｂｏ 十Ｂ、ｘ” （ｇａｕｓｓ）なお上式では
４次以上の高次成分は省略している。１横軸に管軸方向
座標２をとり、縦軸Ｂ、の正領域がピンクフシ１ン磁界
成分で、負領域がバレル磁界成分である。図示の如く、
コア内で最もバレル傾向が強く、全領域でバレル磁界分
布となってお９、電子ビームスポット形状が歪み、７オ
ーカス性能が劣化する原因となっている。BP"Bo 1 B, x" (gauss) In the above equation, higher-order components of the fourth order or higher are omitted. The horizontal axis represents the tube axis direction coordinate 2, and the positive region of the vertical axis B is the pink hook 1 magnetic field component, and the negative region is the barrel magnetic field component. As shown,
The barrel tendency is strongest in the core, resulting in a barrel magnetic field distribution in the entire region9, which distorts the electron beam spot shape and causes deterioration of the orcus performance.
本発明の目的はコンバーゼンス装置の発生する磁界を略
均−磁界としてフォーカス性能を向上させたコンバーゼ
ンス装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a convergence device that improves focusing performance by making the magnetic field generated by the convergence device a substantially uniform magnetic field.
上記目的は、２極磁界を発生する一つの磁極を愚弄対称
軸上に位置する１個のコア突起と、前記対称軸に対称な
角度で両側に配置する２個以上のコア突起で構成し、前
記軸上に位置するコア突起のコイル巻数を基準として各
コア突起に巻線するコイルの巻数比を前記対称軸に近接
するコア突起はど太き（なるように設定して、外部回路
より補正電流を流して略均−な２極磁界（もしくは所望
の２極概界）を発生することにより、達成される。The above object is to configure one magnetic pole that generates a bipolar magnetic field with one core protrusion located on the axis of symmetry, and two or more core protrusions arranged on both sides at symmetrical angles to the axis of symmetry, Based on the number of turns of the coil on the core protrusion located on the axis, the turn ratio of the coil wound around each core protrusion is set so that the core protrusion near the axis of symmetry is thicker, and the ratio is corrected from an external circuit. This is achieved by passing an electric current to generate a substantially uniform bipolar magnetic field (or a desired bipolar approximate field).
またもう一つの手段として、２極磁界を発生する一つの
磁極を２個以上のコア突起で構成し、磁界対称軸に対称
な角度で配置したコア突起に同巻数でコイルを巻線し、
コア突起の前記対称軸に対する角度ｔ−２０度以上４５
度以下の範囲内で設定して、略均−な２極磁界（もしく
は所望の２極磁界）を発生することにより、上記目的は
達成される。Another method is to configure one magnetic pole that generates a bipolar magnetic field with two or more core protrusions, and wind a coil with the same number of turns around the core protrusions arranged at symmetrical angles to the magnetic field symmetry axis.
Angle t of the core protrusion with respect to the axis of symmetry - 20 degrees or more 45
The above object can be achieved by setting the magnetic field within a range of 100°C or less to generate a substantially uniform bipolar magnetic field (or a desired bipolar magnetic field).
一つの磁極を５個以上の奇数個のコア突起で構成した場
合には、軸上に配置したコア突起単体では、バレル磁界
を発生するが、このコア突起の両側に等角度の間隔で配
置したコア突起のコイル巻数が前記軸上に近接するコア
突起はど大きくなるように巻線することにより周辺部の
磁速密度を高めて極全体では略均−磁界を発生する補助
極として作用する。When one magnetic pole is composed of an odd number of five or more core protrusions, a single core protrusion placed on the axis will generate a barrel magnetic field, but if the core protrusions are placed on both sides of this core protrusion at equal angular intervals, a barrel magnetic field will be generated. By winding the core protrusion so that the number of coil turns on the core protrusion increases as the core protrusion approaches the axis, the magnetic velocity density in the peripheral portion is increased, and the entire pole acts as an auxiliary pole that generates a substantially uniform magnetic field.
次に２個以上の偶数個のコア突起で構成した場合には、
水平（もしくは垂直）＠を中心として両側に等角度で同
コイル巻数のコア突起を対応させて２分割して配置され
、コア突起本数及び形状にあわせて前記軸に対する配置
角度が２０［から４５度の範囲内で設定されているので
、極全体としては略均−磁界を発生するように各コア突
起が作用する。Next, when it is composed of an even number of core protrusions of 2 or more,
The core protrusions with the same number of coil turns are arranged at equal angles on both sides with the horizontal (or vertical) center at the center, and are divided into two parts, and the arrangement angle with respect to the axis is 20 to 45 degrees depending on the number and shape of the core protrusions. Since it is set within the range of , each core protrusion acts so as to generate a substantially uniform magnetic field for the entire pole.
以下、本発明の実施例を図を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明のコンバーゼンス装置の第１の実施例を
示す断面図である。リング状部に長方形の突起１，２が
θ−４５度の等角度で合計８個の突起が内側に突出して
いるコアに水平軸もしくは垂直軸上のコア突起１ｔ−中
心としてその両側のコア突起２と合わせて３個で１つの
母種を形成するように各突起にコイル３と４（５と６）
ｔ−巻線し、図示したような２極磁界７（８）を発生さ
せる。FIG. 1 is a sectional view showing a first embodiment of the convergence device of the present invention. A ring-shaped part has rectangular protrusions 1 and 2, and a total of 8 protrusions protrude inward at equal angles of θ - 45 degrees.The core has a core protrusion 1t on the horizontal or vertical axis, and the core protrusions on both sides thereof. Coils 3 and 4 (5 and 6) are attached to each protrusion so that 3 pieces together with 2 form one mother seed.
t-winding to generate a dipole magnetic field 7 (8) as shown.
第３図は第１図のコンバーゼンス装置を陰極線管に装着
した場合の全体図でらる。コンバーゼンス装置は偏向ヨ
ーク３１の電子銃側後部の位置に取付ケられ、コンバー
ゼンス回路２３からコイル５゜４（５，６）に偏向電流
と同期した補正電流（ＣＹ電流）を流して上記２極磁界
７（８）を発生させて、電子ビーム１０を水平方向（垂
直方向）に偏向し、糸巻歪やキーストン歪を補正する。FIG. 3 is an overall view of the convergence device shown in FIG. 1 attached to a cathode ray tube. The convergence device is attached to the rear part of the deflection yoke 31 on the electron gun side, and a correction current (CY current) synchronized with the deflection current is caused to flow from the convergence circuit 23 to the coil 5°4 (5, 6) to reduce the above-mentioned two-pole magnetic field. 7 (8) to deflect the electron beam 10 horizontally (vertically) to correct pincushion distortion and keystone distortion.
第２図は第１図のコンバーゼンス装置の軸上磁界分布を
測定した結果を示した図である。５本の曲線１１〜１５
は軸上の突起１に６０タ一ン巻線し両側の突起２に巻線
する巻数を８０ターン、６０ターン。FIG. 2 is a diagram showing the results of measuring the axial magnetic field distribution of the convergence device shown in FIG. 1. 5 curves 11-15
The number of turns is 60 turns around the protrusion 1 on the shaft, 80 turns around the protrusions 2 on both sides, and 60 turns.
４２ターン、２０ターン、０ターンとそれぞれ設定した
場合の非均−磁界成分（Ｂｚ ／ Ｂ１）ｍａｘ）を示
している。横軸２には管軸方向距離（単位；ｍ ｍ ）
をと９、図中右側が電子銃側、左側が偏向ヨーク側であ
る。曲線の値が横軸より上半分の値をとるときは、第４
図に示す如くビンクツシ曹ン形をした管軸中心Ａよりも
水平軸上の両側位置Ｂでの磁速密度が大きいピンクツシ
ラン磁界でめることを意味する。横軸より下半分の値を
とるときは、第５図に示すｒｔ口＜バレル形をした管軸
中心人が水平軸上の両側位置Ｂでのａ束密度より大きい
バレル磁界であることを意味する。曲線１５は軸上のコ
ア突起１だけで２＠磁界を発生する従来例に相当し、管
軸方向の全域で強いバレル磁界となっている。それに比
べて曲線１３は軸上の突起から４５度離れた両側のコア
突起に、約１／Ｆの巻数＝４２ターンを巻線した場合で
、電子銃側と偏向ヨーク側で弱いバレル磁界、中心部で
弱いビンクツション磁界となっておシ、全体的にみてほ
ぼ均−磁界となっている。その他の曲線１１．１２゜１
４と比較しても、はぼこの曲線１３が４５度のコア突起
位置での略均−磁界を形成する条件となる。なお、この
実施例では１つの磁極を構成する５つのコア突起のうち
、両側のコア突起は、水平磁界用コイル４と垂直磁界用
コイル６ｔ−共通化して使用している。第１図の実施例
を適用することにより、電子ビーム１０に作用する２極
磁界７゜８ｔ−１従来のバレル磁界から略均−函界に改
良できる。第９図はバレル磁界によるビームスポットが
歪む様子を示した図で、左側偏向時は省略している。電
子ビームが１０の位置から３５の位置に偏向されるとき
に磁界の傾き成分の影響を受けて図のように縦長に歪ん
だだ円形状とな夛、フォーカス性能劣化の原因となる。It shows the non-uniform magnetic field component (Bz/B1) max) when set to 42 turns, 20 turns, and 0 turns, respectively. The horizontal axis 2 shows the distance in the tube axis direction (unit: mm)
9. In the figure, the right side is the electron gun side, and the left side is the deflection yoke side. When the value of the curve is in the upper half of the horizontal axis, the fourth
As shown in the figure, this means that the magnetic velocity density at both positions B on the horizontal axis is larger than the center A of the tube axis A, which is shaped like a pink tube. When the value is in the lower half of the horizontal axis, it means that the barrel magnetic field is larger than the a-flux density at both positions B on the horizontal axis when the rt mouth < barrel-shaped tube axis center point shown in Fig. 5 is taken. do. Curve 15 corresponds to the conventional example in which a 2@magnetic field is generated only by the core protrusion 1 on the shaft, and a strong barrel magnetic field is generated over the entire region in the tube axis direction. In comparison, curve 13 shows the case where approximately 1/F turns = 42 turns are wound around the core protrusions on both sides 45 degrees apart from the protrusion on the axis, and the barrel magnetic field is weak on the electron gun side and the deflection yoke side, and the center There is a weak binkushion magnetic field in some parts, and the overall magnetic field is almost uniform. Other curves 11.12゜1
4, the hollow curve 13 is a condition for forming a substantially uniform magnetic field at the core protrusion position of 45 degrees. In this embodiment, among the five core protrusions constituting one magnetic pole, the core protrusions on both sides are commonly used for the horizontal magnetic field coil 4 and the vertical magnetic field coil 6t. By applying the embodiment shown in FIG. 1, the dipole magnetic field acting on the electron beam 10 can be improved from a conventional barrel magnetic field of 7°8t-1 to a substantially uniform box field. FIG. 9 is a diagram showing how the beam spot is distorted by the barrel magnetic field, and the left side deflection is omitted. When the electron beam is deflected from the 10th position to the 35th position, it is affected by the gradient component of the magnetic field and becomes a vertically distorted elliptical shape as shown in the figure, which causes deterioration in focusing performance.
故に、実施例でバレル磁界を略均−磁界にすることで磁
界の傾き成分の影響を低減でき、フォーカス性能が向上
される。Therefore, by making the barrel magnetic field into a substantially uniform magnetic field in the embodiment, the influence of the gradient component of the magnetic field can be reduced, and the focusing performance can be improved.
第８図は第２の実施例を示した断面図である。FIG. 8 is a sectional view showing the second embodiment.
１つの出＃！、を２個のコア突起１ （５０）で構成し
、コイル５（５）を同じ巻数で巻線し、垂直（水平）軸
に対して等角度で左右に配置する。この２つのコア突起
間の角度θを突起の幅、厚さ等に合わせて２０度から４
５にの範囲で設定することに、より発生する２極磁界を
略均−磁界とすることができ、第１の実施例と同等の効
果を有する。One out #! , is composed of two core protrusions 1 (50), coils 5 (5) are wound with the same number of turns, and are arranged left and right at equal angles with respect to the vertical (horizontal) axis. Adjust the angle θ between these two core protrusions from 20 degrees to 4 degrees depending on the width and thickness of the protrusions.
By setting the magnetic field in the range of 5, the generated bipolar magnetic field can be made into a substantially uniform magnetic field, and the same effect as in the first embodiment can be obtained.
第１及び第２の実施例とも、略均−磁界を発生する場合
について述べたが、ある使用条件において、ビンクツシ
ョン磁界やバレル磁界傾向の２極磁界が必要な場合には
、コア突起の設定角度やコイル巻数を変更することによ
り対応できることは明らかである。また実施例では水平
概界、垂直ａ界ともに略均−磁界としているが、どちら
か一方だけに本発明を適用し、他方は従来方式としても
よい。In both the first and second embodiments, the case where a substantially uniform magnetic field is generated has been described, but if a bipolar magnetic field with a binction magnetic field or a barrel magnetic field tendency is required under certain usage conditions, the setting angle of the core protrusion may be changed. It is clear that this can be addressed by changing the number of turns of the coil. Further, in the embodiment, both the horizontal general field and the vertical a-field are approximately uniform magnetic fields, but the present invention may be applied to only one of them, and the conventional method may be applied to the other.
コア突起の設定角度や巻線するコイルの巻数を任意に選
択して発生する２極磁界を略均−磁界とすることができ
るので、コンバーゼンス装置による電子ビームスポット
径の歪ｆを低減し、７オーカス性能を向上できる効果が
ある。By arbitrarily selecting the setting angle of the core protrusion and the number of turns of the coil to be wound, the generated bipolar magnetic field can be made into an approximately equal magnetic field, so the distortion f of the electron beam spot diameter due to the convergence device can be reduced, and the It has the effect of improving orcus performance.
第１図は本発明の第１の実施例を示した断面図、第２図
は第１図の実施例の軸上磁界分布図、第５図は第１図の
実施例の全体配置図、第４図はビンクツション磁界の説
明図、第５図はバレル磁界の説明図、第６図は従来例を
示した断面図、第７図は第６図の従来例の軸上ａ界分布
図、第８図は第２の実施例を示した断面図、第９図はバ
レル磁界による電子ビームスポット形状劣化の様子を示
した模式図である。
１．２・−コア突起、３．４−・水平用ＣＹコイル、５
．６・−垂直用ＣＹコイル、７・・・水平偏向愚弄、８
・−垂直偏向磁界、１０・−電子ビーム、１１〜１５・
・・非均−磁界曲線、３１−・・偏向ヨーク。
７７、ｆ−
第１区
第 ３０
第４０ 躬５Ｚ
躬 ６ 匿
躬 ７区
躬８月FIG. 1 is a sectional view showing the first embodiment of the present invention, FIG. 2 is an axial magnetic field distribution diagram of the embodiment of FIG. 1, and FIG. 5 is an overall layout diagram of the embodiment of FIG. 1. Fig. 4 is an explanatory diagram of the binction magnetic field, Fig. 5 is an explanatory diagram of the barrel magnetic field, Fig. 6 is a sectional view showing the conventional example, Fig. 7 is an axial a-field distribution diagram of the conventional example of Fig. 6, FIG. 8 is a cross-sectional view showing the second embodiment, and FIG. 9 is a schematic diagram showing how the electron beam spot shape deteriorates due to the barrel magnetic field. 1.2--Core protrusion, 3.4--Horizontal CY coil, 5
．． 6.-Vertical CY coil, 7...Horizontal deflection, 8
・-Vertical deflection magnetic field, 10・-Electron beam, 11-15・
... Non-uniform magnetic field curve, 31-... Deflection yoke. 77, f- 1st Ward 30th 40th 5Z 6th Ward 7th Ward 8th
Claims (1)
コアに巻線するコイルと、上記コイルに補正電流を供給
する回路より成るコンバーゼンス装置において、発生す
る２極磁界を略均一磁界としたことを特徴とするコンバ
ーゼンス装置。1. In a convergence device consisting of a core with one magnetic pole having two or more protrusions, a coil wound around this core, and a circuit that supplies a correction current to the coil, the generated bipolar magnetic field is converted into a substantially uniform magnetic field. A convergence device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32699387A JPH01169853A (en) | 1987-12-25 | 1987-12-25 | Convergence device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32699387A JPH01169853A (en) | 1987-12-25 | 1987-12-25 | Convergence device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01169853A true JPH01169853A (en) | 1989-07-05 |
Family
ID=18194107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32699387A Pending JPH01169853A (en) | 1987-12-25 | 1987-12-25 | Convergence device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01169853A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02172143A (en) * | 1988-12-26 | 1990-07-03 | Sony Corp | Auxiliary deflecting apparatus of crt for projector |
| JPH02150643U (en) * | 1989-05-22 | 1990-12-27 |
-
1987
- 1987-12-25 JP JP32699387A patent/JPH01169853A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02172143A (en) * | 1988-12-26 | 1990-07-03 | Sony Corp | Auxiliary deflecting apparatus of crt for projector |
| JPH02150643U (en) * | 1989-05-22 | 1990-12-27 |
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