JPH0869760A - Purity correcting device - Google Patents

Purity correcting device

Info

Publication number
JPH0869760A
JPH0869760A JP20543794A JP20543794A JPH0869760A JP H0869760 A JPH0869760 A JP H0869760A JP 20543794 A JP20543794 A JP 20543794A JP 20543794 A JP20543794 A JP 20543794A JP H0869760 A JPH0869760 A JP H0869760A
Authority
JP
Japan
Prior art keywords
center
crt
electron beam
purity
face surface
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
JP20543794A
Other languages
Japanese (ja)
Inventor
Hideaki Konishi
秀明 小西
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP20543794A priority Critical patent/JPH0869760A/en
Publication of JPH0869760A publication Critical patent/JPH0869760A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To align the electron beam center on the face plane of a CRT with the center of the face plane by installing no less than two sets of dipole magnets, which correct the purity characteristics of a video receiver, around the tube axis of the CRT. CONSTITUTION: Two sets of purity magnets 10, 11 are coaxially installed while a certain spacing L2 is held in the axial direction of a CRT 8. The dislocation of an electron beam emitted from an electron gun 9 with reference to the CRT axis direction can be adjusted by adjusting the magnet spacing L2, intensities of the magnets 10, 11 themselves, and other traits. Thereby the correction is made so that alignment with the CRT axis is generated, and if the electron beam is cast incident to the deflection center 12, the image produced on the face plane 13 is received without deflection up and down or to the left and right with reference to the center 14 of the face plane 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、陰極線管(以下、CR
Tという)を使用したテレビジョン受像機やカラーモニ
ター受像機などの映像受像機に用いられるピュリティ補
正装置に関するものである。
BACKGROUND OF THE INVENTION The present invention relates to a cathode ray tube (hereinafter referred to as CR
The present invention relates to a purity correction device used in a video image receiver such as a television receiver or a color monitor image receiver using T).

【0002】[0002]

【従来の技術】近年のCRTを使用したテレビジョン受
像機やカラーモニター受像機においては、2極マグネッ
トを1組用いて、電子銃の製造ばらつきや電子銃と管軸
とのずれなどによるピュリティのばらつきを補正してお
り、以下、図3を参照しつつ従来のピュリティ補正装置
について説明する。
2. Description of the Related Art In a television receiver or a color monitor receiver using a CRT in recent years, a pair of two-pole magnets is used to improve the purity of the electron gun due to manufacturing variations and deviation between the electron gun and the tube axis. The variation is corrected, and a conventional purity correction device will be described below with reference to FIG.

【0003】図3(a)は従来のピュリティ補正装置の一
例を示す概略図であり、図3(b)はその画面の概要を示
す正面図である。図3(a)において、1はCRT、2は
電子銃、3は2極ピュリティマグネット、4は前記電子
銃2より発射される電子ビームの偏向中心、5はCRT
1のフェイス面、6はフェイス面センター、7はフェイ
ス面5上の電子ビームセンターである。
FIG. 3 (a) is a schematic view showing an example of a conventional purity correction apparatus, and FIG. 3 (b) is a front view showing the outline of the screen. In FIG. 3A, 1 is a CRT, 2 is an electron gun, 3 is a two-pole purity magnet, 4 is a deflection center of an electron beam emitted from the electron gun 2, and 5 is a CRT.
1 is the face surface, 6 is the face surface center, and 7 is the electron beam center on the face surface 5.

【0004】以上のように構成されたピュリティ補正装
置の動作について説明する。まず、電子銃2から発射さ
れた電子ビームは、2極ピュリティマグネット3により
偏向中心4を通るように補正され、補正された電子ビー
ムはCRT1のフェイス面5上の電子ビームセンター7
の位置に到る。この位置はフェイス面センター6の位置
と距離L1だけずれており、この場合の電子ビームの偏
向はフェイス面センター6を基準に行われるのではな
く、ずれた電子ビームセンター7を中心に偏向されるた
め、映し出される映像は図3(b)に示すように図面下方
に片寄ったものとなる。
The operation of the purity correction apparatus configured as above will be described. First, the electron beam emitted from the electron gun 2 is corrected by the two-pole purity magnet 3 so as to pass through the deflection center 4, and the corrected electron beam is emitted from the electron beam center 7 on the face surface 5 of the CRT 1.
Reach the position. This position is displaced from the position of the face surface center 6 by a distance L 1. In this case, the electron beam is not deflected with reference to the face surface center 6, but is deflected around the displaced electron beam center 7. Therefore, the projected image is biased downward in the drawing as shown in FIG. 3 (b).

【0005】また、他の従来例として特開昭61−240532
号公報に示されるように、CRTのネック部に2極マグ
ネットと4極マグネットを付加し、フォーカス特性,コ
ンバーゼンス特性を改善するものがあったが、この装置
は電子ビームのセンターがCRTのフェイス面センター
からずれている点では上記従来例と同様であり、受像し
た映像は片寄ってしまうことになり、電子銃の電子ビー
ム放射軸とCRT管軸とのずれによる画面の片寄りをな
くすことはできなかった。
As another conventional example, Japanese Patent Laid-Open No. 240532/1986.
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, a CRT has a two-pole magnet and a four-pole magnet added to the neck portion to improve focus characteristics and convergence characteristics. However, in this device, the center of the electron beam is the face surface of the CRT. The deviation from the center is similar to the above-mentioned conventional example, and the received image is offset, and it is possible to eliminate the offset of the screen due to the deviation of the electron beam emission axis of the electron gun and the CRT tube axis. There wasn't.

【0006】[0006]

【発明が解決しようとする課題】このように、従来の構
成ではCRTのフェイス面上の電子ビームセンターがフ
ェイス面センターと一致しないので受像した映像が上下
に、あるいは左右に片寄ってしまうという問題点を有し
ていた。
As described above, in the conventional configuration, the electron beam center on the face surface of the CRT does not coincide with the center of the face surface, so that the received image is shifted vertically or horizontally. Had.

【0007】本発明は上記課題を解決するもので、2組
以上の2極マグネットを用いてCRTのフェイス面上の
電子ビームセンターとフェイス面センターとを一致させ
ることにより、片寄りのない映像が得られるピュリティ
補正装置を提供するものである。
The present invention solves the above-mentioned problems, and by using two or more sets of two-pole magnets to align the electron beam center on the face surface of the CRT with the center of the face surface, an image without unevenness can be obtained. The obtained purity correction device is provided.

【0008】[0008]

【課題を解決するための手段】この目的を達成するため
に、本発明のピュリティ補正装置は、CRTを使用した
映像受像機のピュリティ特性を補正する2極マグネット
を前記CRTの管軸周囲に2組以上配置し、ばらついた
ビームを全てCRTの管軸上から偏向中心に入射させ、
CRTのフェイス面上の電子ビームセンターとフェイス
面センターとを一致させるものである。
In order to achieve this object, the purity correcting apparatus of the present invention has a two-pole magnet for correcting the purity characteristic of an image receiver using a CRT, which is provided around the tube axis of the CRT. Place more than one set, and let all scattered beams enter the deflection center from the tube axis of the CRT.
The electron beam center on the face surface of the CRT and the face surface center are made to coincide with each other.

【0009】[0009]

【作用】本発明は上記した構成により、電子ビームが必
ず偏向中心に管軸上を通って入射するため、ビームセン
ターがCRTのフェイス面センターと一致し、映像の片
寄りを防ぐことができる。
According to the present invention, since the electron beam always enters the deflection center on the tube axis due to the above-described structure, the beam center coincides with the center of the face surface of the CRT, and the deviation of the image can be prevented.

【0010】[0010]

【実施例】以下、本発明の一実施例について、図1及び
図2を参照しながら説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

【0011】図1は本発明のピュリティ補正装置の一実
施例を示す概略側面図であり、図中、8はCRT、9は
電子銃、10は第1の2極ピュリティマグネット、11は第
2の2極ピュリティマグネットで、この2組のピュリテ
ィマグネット10,11はCRT8の管軸方向に距離L2
隔てて同軸的に配置されている。12は前記電子銃9より
発射される電子ビームの偏向中心、13はCRT8のフェ
イス面、14はフェイス面センターである。
FIG. 1 is a schematic side view showing an embodiment of a purity correction apparatus of the present invention. In the figure, 8 is a CRT, 9 is an electron gun, 10 is a first two-pole purity magnet, and 11 is a second. The two sets of purity magnets 10 and 11 are coaxially arranged at a distance L 2 in the tube axis direction of the CRT 8. 12 is the deflection center of the electron beam emitted from the electron gun 9, 13 is the face surface of the CRT 8, and 14 is the face surface center.

【0012】以上のように構成されたピュリティ補正装
置について、図2を用いてその動作を説明する。図2
(a)において、まず電子銃9より電子ビームが発射され
る。理想的にはCRT8の管軸方向に発射されるはずで
あるが、現実には製造上のばらつきなど様々な理由でそ
の方向がずれる。そしてこのずれを2組の2極ピュリテ
ィマグネット10,11でCRT8の管軸に揃うように補正
し、電子ビームの偏向中心12に入射させれば、フェイス
面13に映し出される映像は図2(b)に示すようにフェイ
ス面13のセンター14を基準として上下左右の片寄りなく
受像される。
The operation of the purity correction device configured as described above will be described with reference to FIG. Figure 2
In (a), first, an electron beam is emitted from the electron gun 9. Ideally, it should be fired in the tube axis direction of the CRT 8, but in reality the direction is shifted due to various reasons such as manufacturing variations. Then, this deviation is corrected by two sets of two-pole purity magnets 10 and 11 so that they are aligned with the tube axis of the CRT 8, and when the electron beam is made incident on the deflection center 12 of the electron beam, the image projected on the face surface 13 is shown in FIG. As shown in (), the image is received without deviation from the top, bottom, left, and right with respect to the center 14 of the face surface 13.

【0013】なお、この2極ピュリティマグネット10,
11による補正は、両マグネット間の距離L2の調整、マ
グネット自体の強さその他の調整により行うことができ
るが、要すれば、ピュリティマグネットの数を3組、4
組と増やして行くことも考えられる。
The two-pole purity magnet 10,
The correction by 11 can be performed by adjusting the distance L 2 between both magnets, the strength of the magnet itself, and other adjustments.
It is also possible to increase the number with the group.

【0014】[0014]

【発明の効果】以上の実施例から明らかなように、本発
明によれば2極マグネットを2組以上用いることによ
り、CRT上の電子ビームセンターとフェイス面センタ
ーとを一致させることができ、受像した映像のフェイス
面上での片寄りを防ぐことができる。
As is apparent from the above embodiments, according to the present invention, by using two or more pairs of two-pole magnets, the electron beam center on the CRT and the face surface center can be made to coincide with each other, and the image receiving It is possible to prevent the deviation of the recorded image on the face surface.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のピュリティ補正装置の一実施例を示す
概略構成図である。
FIG. 1 is a schematic configuration diagram showing an embodiment of a purity correction device of the present invention.

【図2】本発明の実施例におけるピュリティ補正の動作
説明のための概略図である。
FIG. 2 is a schematic diagram for explaining an operation of purity correction in the embodiment of the present invention.

【図3】従来のピュリティ補正装置とその動作説明のた
めの概略図である。
FIG. 3 is a schematic diagram for explaining a conventional purity correction device and its operation.

【符号の説明】[Explanation of symbols]

1,8…CRT、 2,9…電子銃、 3…2極ピュリ
ティマグネット、 4,12…電子ビームの偏向中心、
5,13…フェイス面、 6,14…フェイス面センター、
7…ビームセンター、 10…第1の2極ピュリティマ
グネット、 11…第2の2極ピュリティマグネット。
1, 8 ... CRT, 2, 9 ... Electron gun, 3 ... 2-pole purity magnet, 4, 12 ... Electron beam deflection center,
5,13 ... Face surface, 6,14 ... Face surface center,
7 ... Beam center, 10 ... First two-pole purity magnet, 11 ... Second two-pole purity magnet.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 陰極線管を使用した映像受像機のピュリ
ティ特性を補正する2極マグネットを上記陰極線管の管
軸周囲に2組以上配置したことを特徴とするピュリティ
補正装置。
1. A purity correction device comprising two or more sets of two-pole magnets for correcting the purity characteristic of an image receiver using a cathode ray tube, arranged around the tube axis of the cathode ray tube.
【請求項2】 ピュリティ特性を補正する2組以上の2
極マグネットにより電子ビームを陰極線管の管軸上から
偏向中心に入射させ、陰極線管のフェイス面上の電子ビ
ームセンターとフェイス面センターとを一致させたこと
を特徴とする請求項1記載のピュリティ補正装置。
2. Two or more sets of two for correcting the purity characteristic
The purity correction according to claim 1, wherein an electron beam is made incident on the deflection center from the tube axis of the cathode ray tube by a polar magnet, and the electron beam center on the face surface of the cathode ray tube and the face surface center are made coincident with each other. apparatus.
JP20543794A 1994-08-30 1994-08-30 Purity correcting device Pending JPH0869760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20543794A JPH0869760A (en) 1994-08-30 1994-08-30 Purity correcting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20543794A JPH0869760A (en) 1994-08-30 1994-08-30 Purity correcting device

Publications (1)

Publication Number Publication Date
JPH0869760A true JPH0869760A (en) 1996-03-12

Family

ID=16506862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20543794A Pending JPH0869760A (en) 1994-08-30 1994-08-30 Purity correcting device

Country Status (1)

Country Link
JP (1) JPH0869760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569557B1 (en) 1998-09-17 2003-05-27 Ngk Insulators, Ltd. Lithium secondary battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569557B1 (en) 1998-09-17 2003-05-27 Ngk Insulators, Ltd. Lithium secondary battery

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