JPH0132620B2 - - Google Patents
Info
- Publication number
- JPH0132620B2 JPH0132620B2 JP54142805A JP14280579A JPH0132620B2 JP H0132620 B2 JPH0132620 B2 JP H0132620B2 JP 54142805 A JP54142805 A JP 54142805A JP 14280579 A JP14280579 A JP 14280579A JP H0132620 B2 JPH0132620 B2 JP H0132620B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- picture tube
- color picture
- coil
- predetermined
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
- H01J2229/0046—Preventing or cancelling fields within the enclosure
- H01J2229/0053—Demagnetisation
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Description
【発明の詳細な説明】
本発明はカラー受像管の製造方法に係り、特に
カラー受像管のネツク近傍の内部及びまたは外部
に配設された少なくとも１個の磁性体に複数個の
磁極を形成し、この磁極によりカラー受像管の静
コンバージエンス及びまたは色純度を行なうよう
にしたカラー受像管の製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a color picture tube, and particularly to a method for manufacturing a color picture tube, in particular a method for forming a plurality of magnetic poles on at least one magnetic body disposed inside and/or outside of the color picture tube near the neck. The present invention relates to a method of manufacturing a color picture tube in which static convergence and/or color purity of the color picture tube is achieved using the magnetic poles.
カラー受像管のネツク内部に磁性体を設け、カ
ラー受像管の組立終了後、外部からこの磁性体に
複数個の磁極を形成する方法としては例えば特開
昭52−117517号公報に見られるような方法があ
る。この方法にはカラー受像管の磁性体の磁極を
形成する位置に対応して６極の磁心と６個のコイ
ルを有する磁化装置のコイルに電流を流すことに
よつて磁性体に６個の磁極を形成するか、あるい
は減磁を行なう際に単に６個のコイルのパルス電
流の波高値の大きさを変化することにより磁性体
の磁化を自由に変えられると述べられているが、
この公報には、パルス電流の印加時点が明記され
てなく、例えば、磁性体の厚さ方向に磁化する場
合には、各コイルに順次パルス電流を流すと磁性
体に所定の磁極を形成することは不可能である。 A method of providing a magnetic material inside the neck of a color picture tube and forming a plurality of magnetic poles on the magnetic material from the outside after the assembly of the color picture tube is completed is as shown in, for example, Japanese Patent Laid-Open No. 117517/1983. There is a way. In this method, six magnetic poles are formed in the magnetic material by passing current through the coils of a magnetizing device, which has a six-pole magnetic core and six coils, corresponding to the positions where the magnetic poles of the magnetic material of the color picture tube are to be formed. It is stated that the magnetization of the magnetic material can be freely changed by simply changing the magnitude of the peak value of the pulse current of the six coils when forming or demagnetizing.
This publication does not specify the point at which the pulse current is applied; for example, when magnetizing a magnetic material in the thickness direction, it is possible to form a predetermined magnetic pole in the magnetic material by sequentially applying a pulse current to each coil. is impossible.
その理由は前に磁化した磁極が次の磁極を磁化
する時に減磁されるためである。また磁化するカ
ラー受像管内の環状の磁性体は現在最も多く生産
されているカラー受像管のネツク径（外径29.1
mm）では通常直径21〜23mmとなり、またこの様な
環状磁性体を多極に磁化するためにはそれに用い
る磁心の大きさは限られてくる。したがつて磁化
装置の磁心の大きさはほぼ５mm位となり、それに
巻回されるコイルの巻数も限られたものとなる。
しかるに通常カラー受像管に装着される磁性体は
外部磁界の影響を受けないように保磁力（Hc）
が300〜600エルステツド程度の大きさを持つた
め、このような磁性体に磁極を形成するには、大
電流によつて磁心に磁界を作らなければ磁性体を
磁化することは困難であり、この様な大電流を使
用すると、各部の発熱が大きく、通常のコンバー
ジエンス調整時間程度通電することは不可能とな
る。 The reason for this is that the previously magnetized magnetic pole is demagnetized when magnetizing the next magnetic pole. In addition, the annular magnetic body inside the color picture tube that is magnetized has a neck diameter (outer diameter 29.1
mm), the diameter is usually 21 to 23 mm, and in order to magnetize such an annular magnetic body into multiple poles, the size of the magnetic core used therein is limited. Therefore, the size of the magnetic core of the magnetizing device is approximately 5 mm, and the number of turns of the coil wound around it is also limited.
However, the magnetic material normally attached to color picture tubes has a high coercive force (Hc) so that it is not affected by external magnetic fields.
has a size of about 300 to 600 oersted, so in order to form a magnetic pole in such a magnetic material, it is difficult to magnetize the magnetic material unless a magnetic field is created in the magnetic core with a large current. If such a large current is used, each part generates a large amount of heat, making it impossible to conduct electricity for the normal convergence adjustment time.
本発明は前述した従来の欠点に鑑みなされたも
のであり、磁性体の磁化をより精密に行ない、調
整をより正確に行なうことが可能なカラー受像管
の製造方法を提供することを目的としている。 The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a method for manufacturing a color picture tube, which allows more precise magnetization of a magnetic material and more accurate adjustment. .
即ち、本発明の特徴はカラー受像管のネツク近
傍の内部及びまたは外部に例えば環状の磁性体を
配設し、この磁性体をカラー受像管組立完了後に
磁化装置により所定強さの磁界を有する所定個数
の磁極を形成し、カラー受像管の静コンバージエ
ンス、色純度調整を行ない得るようにしたカラー
受像管の製造方法に於て、磁性体の磁化あるいは
減磁にパルス磁界を使用し、このパルス磁界を印
加する時間差を１ｍsec以下で同時に行なうよう
にしたことを特徴としている。 That is, a feature of the present invention is that, for example, a ring-shaped magnetic body is disposed inside and/or outside of the color picture tube near the neck, and after the color picture tube is assembled, the magnetic body is heated to a predetermined magnetic field having a predetermined strength by a magnetizing device. In the manufacturing method of a color picture tube, in which a number of magnetic poles are formed to enable static convergence and color purity adjustment of the color picture tube, a pulsed magnetic field is used to magnetize or demagnetize the magnetic material, and the pulse The feature is that the magnetic fields are applied simultaneously with a time difference of 1 msec or less.
次に図によつて本発明の一実施例を説明する。 Next, one embodiment of the present invention will be described with reference to the drawings.
即ち第１図に於てカラー受像管１のネツク２に
内装された複数の電子ビームを射出する電子銃３
の所望位置を取り巻くように環状の磁性体４が設
けられており、この磁性体４は好ましくは保磁力
（Hc）＝300〜500エルステツド程度の硬質の磁性
体から形成されている。この磁性体４に対応する
ネツク２外部にはこの磁性体４を多極に磁化、減
磁することが可能な磁化装置５が設けられてお
り、この磁化装置５に所定波高値のパルス電流を
供給するためのパルス電源６が接続されている。 That is, in FIG. 1, an electron gun 3 that emits a plurality of electron beams is housed in a network 2 of a color picture tube 1.
An annular magnetic body 4 is provided so as to surround a desired position of the magnetic body 4, and this magnetic body 4 is preferably made of a hard magnetic body having a coercive force (Hc) of about 300 to 500 oersteds. A magnetization device 5 capable of magnetizing and demagnetizing the magnetic material 4 into multiple poles is provided outside the net 2 corresponding to the magnetic material 4, and a pulse current of a predetermined peak value is applied to the magnetization device 5. A pulse power source 6 for supplying the power is connected.
次に磁化装置５とパルス電源６との関係を第２
図によつて説明する。 Next, the relationship between the magnetization device 5 and the pulse power source 6 is
This will be explained using figures.
即ち、ａ図の如くネツク２内に装着された磁性
体４に対応する位置に高磁性部材からなる環状支
持体１０に例えば８個の磁極形成用の磁心１１1，
１２1，１３1，１４1，１５1，１６1，１７1，１
８1を設け、これら８個の磁心１１1乃至１８1に
それぞれ電流入出部１１2，１２2，１３2，１４
２，１５2，１６2，１７2，１８2を有するコイルを
巻回した磁化装置５のそれぞれの電流入出部１１
２乃至１８2はｂ図に示すようにパルス電源１１，
１２，１３，１４，１５，１６，１７，１８に接
続され、これらパルス電源１１乃至１８は制御装
置１９により同時に制御されるようになつてい
る。 That is, as shown in Fig. a, for example, eight magnetic cores 11 1 for forming magnetic poles are attached to an annular support 10 made of a highly magnetic material at positions corresponding to the magnetic bodies 4 installed in the neck 2.
12 1 , 13 1 , 14 1 , 15 1 , 16 1 , 17 1 , 1
8 1 are provided, and current input/output portions 11 2 , 12 2 , 13 2 , 14 are provided in these eight magnetic cores 11 1 to 18 1 , respectively.
2 , 15 2 , 16 2 , 17 2 , and 18 2 current input/output portions 11 of each of the magnetization devices 5 wound with coils having
2 to 18 2 are pulse power supplies 11, as shown in figure b.
12, 13, 14, 15, 16, 17, and 18, and these pulse power supplies 11 to 18 are controlled simultaneously by a control device 19.
この様な回路において、パルス電源１１乃至１
８は予め何らかの方法で決定され磁性体４に所定
の磁界分布を有する磁極を形成し得る極性および
強度に応じた波高値のパルス電流を各磁心に与え
得るように制御装置１９により設定される。次に
各コイルに流すパルス電流値の設定が終了した時
点で制御装置１９からの出力信号によりパルス電
源１１乃至１８より所定の波高値のパルス電流が
電流入出部１１2乃至１８2よりコイルに流される
ことになる。この時、各磁心１１1乃至１８1に巻
回された各コイルの抵抗値、インダクタンス、パ
ルス電源１１乃至１８のスイツチング特性などに
より、所定の波高値のパルス電流を与える時間に
ばらつきが発生することがある。この時は制御装
置１９のスイツチングパルスをパルス電源１１乃
至１８に出入力する時間を調整しても良いし、ま
たパルス電源１１乃至１８のスイツチングパルス
入力に遅延回路などを組込み、シンクロスコープ
などを見ながらパルス電源１１乃至１８からのパ
ルス電流のピーク値が同じ時間になるように調整
を行つても良い。またパルス電源１１乃至１８の
いずれかに流す電流が零の場合には充電、放電を
行なわなくても良いようにすることができる。ま
たパルス電源１１乃至１８から各磁心１１1乃至
１８1のコイルに供給される電流は数1000Aと非
常に大きく、またそのパルス幅は数ｍsec程度で
あるので、このパルス電流のピーク値の時間がた
とえ２〜３ｍsec程度ずれても各磁極を順次磁化
したのと同じ結果となり、正確に永久磁石４を磁
化することは不可能になる。したがつて磁化磁界
の値に応じた磁化を永久磁石４に与えるためには
少なくとも１ｍsec以下のずれ時間でパルス電流
を与え得るようにすべきである。 In such a circuit, pulse power supplies 11 to 1
8 is predetermined by some method and is set by the control device 19 so that a pulse current having a peak value corresponding to the polarity and intensity that can form a magnetic pole having a predetermined magnetic field distribution in the magnetic body 4 can be applied to each magnetic core. Next, when the setting of the pulse current value to be passed through each coil is completed, a pulse current of a predetermined peak value is passed from the pulse power supplies 11 to 18 to the coils from the current input/output parts 11 2 to 18 2 in response to an output signal from the control device 19. It will be. At this time, due to the resistance value and inductance of each coil wound around each magnetic core 11 1 to 18 1 , the switching characteristics of the pulse power supplies 11 to 18, etc., variations may occur in the time for applying a pulse current of a predetermined peak value. There is. At this time, the time for inputting/outputting the switching pulses of the control device 19 to the pulse power supplies 11 to 18 may be adjusted, or a delay circuit or the like may be built into the switching pulse inputs of the pulse power supplies 11 to 18, and a synchroscope or the like may be used. Adjustments may be made while watching the figure so that the peak values of the pulse currents from the pulse power supplies 11 to 18 are at the same time. Furthermore, when the current flowing through any of the pulse power sources 11 to 18 is zero, it is possible to eliminate the need for charging and discharging. Furthermore, the current supplied from the pulse power supplies 11 to 18 to the coils of each magnetic core 11 1 to 18 1 is extremely large, at several thousand A, and its pulse width is approximately several milliseconds, so the peak value of this pulse current is Even if there is a difference of about 2 to 3 msec, the result will be the same as if the magnetic poles were sequentially magnetized, and it would be impossible to magnetize the permanent magnet 4 accurately. Therefore, in order to provide the permanent magnet 4 with magnetization corresponding to the value of the magnetizing magnetic field, it is necessary to apply a pulse current with a time lag of at least 1 msec or less.
前記実施例に於ては、磁化装置として８個の磁
心のあるものについて説明したが、これに限定さ
れるものではなく、またパルス電流のピーク値を
１ｍsec以内にするための手段としては前記実施
例のほか種々考えられることは勿論である。 In the above embodiment, a magnetization device having eight magnetic cores has been described, but the present invention is not limited to this, and the above-mentioned embodiment can be used as a means for keeping the peak value of the pulse current within 1 msec. Of course, there are many other possibilities besides the examples.
上述のように本発明のカラー受像管の製造方法
によればカラー受像管のネツク近傍の内部及びま
たは外部に配設された磁化し得る磁性体の磁化を
より精密に行ない、調整をより正確に行なうこと
が可能であり、色純度、静コンバージエンスの良
好なカラー受像管を得ることが出来るので、その
工業的価値は極めて大である。 As described above, according to the method of manufacturing a color picture tube of the present invention, the magnetizable magnetic material disposed inside and/or outside near the neck of the color picture tube can be more precisely magnetized, and adjustment can be made more accurately. It is possible to obtain a color picture tube with good color purity and static convergence, so its industrial value is extremely large.
第１図及び第２図は本発明のカラー受像管の製
造方法を説明する図であり、第１図は概略線図、
第２図ａは磁化装置の一例を示す簡略図、第２図
ｂはａ図の磁化装置にパルス電流を印加する回路
を示す線図である。
２……ネツク、４……磁性体、５……磁化装
置、６，１１，１２，１３，１４，１５，１６，
１７，１８……パルス電源、１９……制御装置。
1 and 2 are diagrams for explaining the method of manufacturing a color picture tube of the present invention, and FIG. 1 is a schematic diagram;
FIG. 2a is a simplified diagram showing an example of a magnetizing device, and FIG. 2b is a diagram showing a circuit for applying a pulse current to the magnetizing device shown in FIG. 2a. 2... Net, 4... Magnetic material, 5... Magnetizing device, 6, 11, 12, 13, 14, 15, 16,
17, 18...Pulse power supply, 19...Control device.
Claims (1)
ク近傍の内部及びまたは外部に配設された少なく
とも１個の環状の磁性体に前記カラー受像管の組
立終了後、磁化装置により所定磁界を有する複数
個の磁極を形成し、前記磁極により静コンバージ
エンス及びまたは色純度調整を行ない得るように
したカラー受像管の製造方法に於て、前記磁化装
置の磁極形成用の磁心にそれぞれ巻回されたコイ
ルに対し、各コイルにそれぞれ独立に接続された
電源から同時に所定の波高値のパルス電流を印加
し、前記磁性体に所定強さの磁極を形成するよう
にしたことを特徴とするカラー受像管の製造方
法。1. At least one annular magnetic body disposed inside and/or outside near the neck of a color picture tube incorporating a plurality of electron guns is provided with a predetermined magnetic field by a magnetization device after the assembly of the color picture tube is completed. In a method for manufacturing a color picture tube, each coil is wound around a magnetic core for forming magnetic poles of the magnetizing device, in which a number of magnetic poles are formed and the magnetic poles are used to perform static convergence and/or color purity adjustment. In contrast, there is provided a color picture tube characterized in that a pulse current of a predetermined peak value is simultaneously applied to each coil from a power source connected independently to each coil to form a magnetic pole of a predetermined strength in the magnetic body. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14280579A JPS5667138A (en) | 1979-11-06 | 1979-11-06 | Manufacturing method of color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14280579A JPS5667138A (en) | 1979-11-06 | 1979-11-06 | Manufacturing method of color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5667138A JPS5667138A (en) | 1981-06-06 |
| JPH0132620B2 true JPH0132620B2 (en) | 1989-07-07 |
Family
ID=15324042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14280579A Granted JPS5667138A (en) | 1979-11-06 | 1979-11-06 | Manufacturing method of color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5667138A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175232A (en) * | 1982-04-07 | 1983-10-14 | Mitsubishi Electric Corp | Automatic regulator for color picture tube |
| JPS6222351A (en) * | 1985-07-19 | 1987-01-30 | Mitsubishi Electric Corp | Auxiliary adjusting device for convergence |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2612607C3 (en) * | 1976-03-25 | 1984-01-12 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Static convergence correction device in color television picture display tubes |
-
1979
- 1979-11-06 JP JP14280579A patent/JPS5667138A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5667138A (en) | 1981-06-06 |
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