JPS6175055U

JPS6175055U -

Info

Publication number: JPS6175055U
Application number: JP15945584U
Authority: JP
Priority date: 1984-10-22
Filing date: 1984-10-22
Publication date: 1986-05-21

Description

[Brief explanation of the drawing]

第１図は一般的なインライン型カラー受像装置
を概略的に示す図、第２図はカラー受像管内の磁
界の状況を示す第１図中−線に沿う拡大矢視
図、第３図は水平偏向電流の波形図、第４図は電
子ビームＲ，Ｂが渦電流磁界により偏向される状
況を示す図、第５図は第４図の偏向により生じた
ミスコンバーゼンスパターンを示す図、第６図は
第５図のミスコンバーゼンスを補正したときにそ
の副作用として生じたミスコンバーゼンスパター
ンを示す図、第７図は本考案になる偏向ヨークの
一実施例の斜視図、第８図はこの偏向ヨークを組
付けてなるカラー受像装置を概略的に示す図、第
９図は水平偏向周波数別に強さの異なる補正磁界
を発生させるための手段を示すと共に第７図の偏
向ヨークによるミスコンバーゼンスの補正動作を
説明する図である。５ａ，５ｂ…垂直偏向コイル、６ａ，６ｂ…水
平偏向コイル、７…水平偏向磁界、８…電子銃の
一部、９…ゲツタ、１０…ゲツタ支持板、１１ａ
，１１ｂ，１１ａ′，１１ｂ′，１２ａ，１２ｂ
，１２ａ′，１２ｂ′，３０ａ，３０ｂ，３２ａ
，３２ｂ…磁束、１３，１３′，１４，１４′，
３４，３４′，３５，３５′…渦電流磁界、２０
…偏向ヨーク、２１…水平偏向周波数切り換え型
カラー受像装置、２２，２３…コイル、２２ａ，
２３ａ…端部、２４…スイツチ、２５…直流電源
、２６，２８…端子、２７…水平偏向周波数切り
換え装置、３１，３３，３６，３７…補正磁界。 Figure 1 is a diagram schematically showing a general in-line color picture receiver, Figure 2 is an enlarged view taken along the - line in Figure 1, showing the state of the magnetic field inside the color picture tube, and Figure 3 is a horizontal view. Waveform diagram of deflection current, Figure 4 is a diagram showing the situation where electron beams R and B are deflected by an eddy current magnetic field, Figure 5 is a diagram showing the misconvergence pattern caused by the deflection in Figure 4, Figure 6 5 is a diagram showing a misconvergence pattern that occurs as a side effect when the misconvergence shown in FIG. 5 is corrected. FIG. 7 is a perspective view of an embodiment of the deflection yoke according to the present invention. FIG. 9 is a diagram schematically showing the assembled color image receiving device. FIG. 9 shows a means for generating a correction magnetic field with different strengths depending on the horizontal deflection frequency, and also shows the misconvergence correction operation by the deflection yoke shown in FIG. 7. FIG. 5a, 5b...Vertical deflection coil, 6a, 6b...Horizontal deflection coil, 7...Horizontal deflection magnetic field, 8...Part of electron gun, 9...Getter, 10...Getter support plate, 11a
, 11b, 11a', 11b', 12a, 12b
, 12a', 12b', 30a, 30b, 32a
, 32b...magnetic flux, 13, 13', 14, 14',
34, 34', 35, 35'...eddy current magnetic field, 20
...Deflection yoke, 21...Horizontal deflection frequency switching type color image receiving device, 22, 23... Coil, 22a,
23a... End portion, 24... Switch, 25... DC power supply, 26, 28... Terminal, 27... Horizontal deflection frequency switching device, 31, 33, 36, 37... Correction magnetic field.

Claims

[Scope of utility model registration request]

In a deflection yoke used in a color picture receiver of the type that is assembled to a color picture tube having three electron guns arranged in-line and whose horizontal deflection frequency can be switched, the color picture tube when assembled to the color picture tube A coil is provided at a position facing the metal part in the picture tube with its end facing the metal part, and the coil cancels the eddy current magnetic field generated by the eddy current induced in the metal part by the deflection magnetic field. A deflection yoke comprising means for supplying currents of different levels to the coil in response to switching of the horizontal deflection frequency so as to generate a magnetic field sufficient to generate a magnetic field.