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Centering magnet of deflection yoke and its producing method

A magnet, centering adjustment technology, applied in the field of deflection yoke, can solve the problems of deterioration of focusing performance, reduction of image resolution, etc., to achieve the effect of eliminating the adjustment magnetic force

Inactive Publication Date: 2002-03-13
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the focusing performance of the image displayed by the electron beam on the kinescope deteriorates, reducing the resolution of the image

Method used

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  • Centering magnet of deflection yoke and its producing method
  • Centering magnet of deflection yoke and its producing method
  • Centering magnet of deflection yoke and its producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] As shown in Figure 1, the centering magnet (1) of the present embodiment is made of nylon amide fiber resin (hereinafter referred to as magnetic resin) containing Alnico alloy magnetic material powder, and is formed to have a central hole (18 ) in the ring shape, and magnetize the parts deviated by 180 degrees around the central axis of the ring into N poles (12) and S poles (13). In the centering magnet (1), a pair of rotation adjustment wings (10) (11) protrude outward from two positions where the N pole (12) and the S pole (13) are formed. (10) (11) The front end portion is formed with a pair of resin inlet and outlet traces (19) (19).

[0045] In addition, in the centering magnet (1), its ring shape becomes a line with respect to the extension line (A-A line) of the diameter line connecting the center point (16) of the N pole (12) and the center point (17) of the S pole (13). Symmetrical, and at the same time become line symmetric with respect to the extension line...

Embodiment 2

[0057] The centering magnet (4) of the present embodiment shown in Fig. 7 is the same as embodiment 1, adopts the nylon amide fiber resin that contains Alnico alloy magnetic material powder to form ring shape, deviates 180 around this ring center axis A pair of rotation adjustment wings (10) (11) are protruded at the position of degree, on the other hand, one rotation adjustment wing (10) is magnetized into N pole (12), and the other rotation adjustment wing (11) is magnetized Into the S pole (13), except that a pair of resin inlet and outlet traces (19) (19) are formed at a position deviated from a 90-degree phase with a pair of rotation adjustment wing parts (10) (11), other shapes are the same as those of Embodiment 1 same.

[0058] In the manufacture of the centering magnet (4), at first as shown in Figure 8, there is a metal mold (25) with an annular cavity (26) corresponding to the profile of the centering magnet, and in the metal mold (25) The cavity (26) is provided w...

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Abstract

The invention provides a deflection yoke having two centering magnets mounted thereon for the adjustment of centering. Each of the centering magnets is molded in an annular form from a resin material containing a finely divided magnetic material, the centering magnet having two portions opposed to each other as displaced from each other by 180 degrees about a center axis of the annular form thereof and magnetized to an N pole and an S pole respectively, the content of the magnetic material varying circumferentially of the annular form, the distribution of the content being symmetrical about a straight line orthogonal to a straight line through a center point of the N pole and a center point of the S pole. The magnetic force for the adjustment of centering can be eliminated by the two magnets mounted in combination.

Description

technical field [0001] The present invention relates to a deflection yoke for deflecting an electron beam emitted from a cathode ray tube. Background technique [0002] As shown in Figure 10(a) and Figure 10(b), two ring-shaped centering magnets (7) (7) are installed at the end of the neck side of the deflection yoke (6), and by rotating the two centering magnets (7)(7), the centering of the electron beam can be adjusted. [0003] The centering magnet (7) is made of resin (hereinafter referred to as magnetic resin) mixed with magnetic material powder. Figure 11 In the ring shape shown, two positions deviated by 180 degrees around the central axis of the ring shape are magnetized into N pole (73) and S pole (74), forming a bipolar magnet. In addition, in the centering magnet (7), a pair of rotation adjustment wing portions (70) (71) protrude from two positions where the N pole (73) and the S pole (74) are formed. In addition, the ring shape of the centering magnet (7) beco...

Claims

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Application Information

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IPC IPC(8): H01J29/76H01F7/02H01J29/54H01J29/70
CPCH01F7/0278B82Y15/00H01J29/701
Inventor 吉山伸二
Owner SANYO ELECTRIC CO LTD