JPS58204446A - Assembly method for shadow mask of color picture tube - Google Patents
Assembly method for shadow mask of color picture tubeInfo
- Publication number
- JPS58204446A JPS58204446A JP8487282A JP8487282A JPS58204446A JP S58204446 A JPS58204446 A JP S58204446A JP 8487282 A JP8487282 A JP 8487282A JP 8487282 A JP8487282 A JP 8487282A JP S58204446 A JPS58204446 A JP S58204446A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- welding
- color picture
- picture tube
- assembly method
- 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
- 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
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
- H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はシャドウマスクの磁気に対する問題点を軽減す
るためのカラー受像管のシャドウマスク組立方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of assembling a shadow mask of a color picture tube to alleviate problems related to magnetism of the shadow mask.
従来、シャドウマスクは溶接に工って７レームに取付け
ているが、浴接時に流れる大電流に工っでシャドウマス
クが着磁さｎ８、この部分で電子ビームの偏向が他の部
分と異なシランディングエラーの現象が発生するという
問題がめつ７’ＣＯ本発明の目的は、カラー受像管への
７ヤドウ１スクの磁気の影ｑＩを軽減し、その特性向上
全はかるもので、品質の良好な力２−受像管が得られる
シャドウマスク組立方法全提供することにある０以下、
本発明の・一実施例を第１図により説明する。第１図は
、シャドウマスク組立時の要部断面図である。シャドウ
マスク組立は、最初にフレーム２とスプリング３を電極
４，５にエフ挾んで加圧機構で加圧し、電流全通して溶
接する０次工程において、シャドウマスク１とフレーム
２とを同様の方式に工り溶接し、組立全完了する０この
時の溶接電流は数百アンペアから数千アンペアの大電流
を使用するが、この溶接点６に流ｎる大電流のため磁場
が発生し、強磁性体を用いるシャドウマスクはこの磁場
で着磁される。しかも、シャドウマスクは数点又は士数
点の溶接点にＬつて組立てらｊている。溶接点以外では
、電子ビームのう／ディングエラーはないが、着磁され
た部分ではランディングエラーを生じる。よって、児成
された管球画面上では、そのランディングの差によって
色むらが発生するおそｎ−がある。Conventionally, the shadow mask is attached to the 7 frame by welding, but the shadow mask is magnetized by the large current flowing during bath contact, and the deflection of the electron beam in this part is different from other parts. The purpose of the present invention is to reduce the magnetic influence qI of the 7' 1 screen on the color picture tube, and to improve its characteristics, thereby solving the problem of landing error phenomenon. 2-Provide a complete shadow mask assembly method for obtaining a picture tube of 0 or less,
An embodiment of the present invention will be explained with reference to FIG. FIG. 1 is a sectional view of the main parts when assembling the shadow mask. In the shadow mask assembly, the shadow mask 1 and the frame 2 are assembled in the same way in the 0th step, in which the frame 2 and the spring 3 are first sandwiched between the electrodes 4 and 5, pressure is applied by a pressure mechanism, and the current is fully passed through and welded. The welding current is from several hundred amperes to several thousand amperes, and the large current flowing through the welding point 6 generates a strong magnetic field. A shadow mask using a magnetic material is magnetized by this magnetic field. Furthermore, the shadow mask is assembled at several or several welding points. There is no landing error of the electron beam at areas other than the welding point, but landing errors occur at magnetized areas. Therefore, there is a possibility that color unevenness will occur on the generated tube screen due to the difference in landing.
このため、シャドウマスク１の溶接部分の着磁を消磁コ
イル７に減衰交流全通電することによって溶接完了直後
に溶接点部領域を消磁することにより、前述した従来の
欠点を解除できる。Therefore, by demagnetizing the welding portion of the shadow mask 1 by fully energizing the degaussing coil 7 with attenuated alternating current to demagnetize the welding point region immediately after welding is completed, the above-described drawbacks of the conventional welding region can be overcome.
従来は、第２図に示す管球の地磁気による影響、つまり
電子ビームの磁力による影響除去のため、消磁コイルで
パネル８またはファンネル９上から管内のシャドウマス
ク１、フレーム２を消磁する方法をとっていた。なお、
１０はネック、１１はインナシールド板である。しかし
この方法では、＠接電流にて着磁したシャドウマスクの
部分の消磁までは十分に行なえないため、第１図に示す
ように近距離からしかも浴接完了時に消磁する方が消磁
効果も良く、工程を新ら之に追加する必要もない０
このように本発明にＬｌ、ば、シャドウマスクの溶接に
よる着磁現象を確実に除去できるため、ランディングエ
ラー金なくしてカラー受像管の画質を向上できる効果が
ある。Conventionally, in order to eliminate the influence of the earth's magnetism on the tube shown in Fig. 2, that is, the influence of the magnetic force of the electron beam, a method was used to demagnetize the shadow mask 1 and frame 2 inside the tube from above the panel 8 or funnel 9 using a degaussing coil. was. In addition,
10 is a neck, and 11 is an inner shield plate. However, with this method, it is not possible to sufficiently demagnetize the part of the shadow mask that has been magnetized by the contact current, so it is better to demagnetize from a short distance and when the bath welding is completed, as shown in Figure 1, for a better demagnetizing effect. , there is no need to add a new process. In this way, the present invention can reliably eliminate the magnetization phenomenon caused by welding the shadow mask, thereby eliminating landing errors and improving the image quality of color picture tubes. There is an effect that can be done.
【図面の簡単な説明】
第１図は本発明におけるシャドウマスク組立時の要部断
面図、第２図は通常のカラー受像管の断面図である。
１・ｅ・・シャドウマスク、２・・・・フレーム、３・
・・・スプリング、４，５・・・・溶接電極、６・・・
・溶接点、７・・・・消磁コイル。
代理人 弁理士 薄 １）利 幸 、
−。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of essential parts when assembling a shadow mask according to the present invention, and FIG. 2 is a cross-sectional view of a conventional color picture tube. 1.e...Shadow mask, 2...Frame, 3.
...Spring, 4, 5...Welding electrode, 6...
・Welding point, 7... Demagnetizing coil. Agent Patent Attorney Susuki 1) Toshiyuki, -.
Claims (1)
マスクへの着磁を除去するために、シャドウマスク溶接
後に消磁コイルによって溶接部を７６峰することを特徴
とするカラー受像管のシャドウマスク組立方法０A method for assembling a shadow mask for a color picture tube, characterized in that after welding the shadow mask, the welded area is demagnetized by a degaussing coil in order to remove the magnetization of the mask caused by welding current (generated by the welding current) during the assembling of the shadow mask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8487282A JPS58204446A (en) | 1982-05-21 | 1982-05-21 | Assembly method for shadow mask of color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8487282A JPS58204446A (en) | 1982-05-21 | 1982-05-21 | Assembly method for shadow mask of color picture tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58204446A true JPS58204446A (en) | 1983-11-29 |
Family
ID=13842881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8487282A Pending JPS58204446A (en) | 1982-05-21 | 1982-05-21 | Assembly method for shadow mask of color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58204446A (en) |
-
1982
- 1982-05-21 JP JP8487282A patent/JPS58204446A/en active Pending
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