JP2000182537A - Purity and convergence adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of changing fitting position of an adjusting magnet and quantity of magnetization by providing an angle difference between front side N/S pole positions and a neck side S/N pole positions with each two-pole, four-pole and six-pole ring-like plastic magnet for adjusting purity, static convergence of an electron beam adjusting magnetic part. SOLUTION: An angle difference 16 is provided between magnetizing positions of an N-pole 10 and a S-pole 11 of a front side 8, and the similar angle difference 16 is provided in a neck side 9. The angle difference of the front side and the neck side are formed in the opposite direction. The front side 8 and the neck side 9 are overlapped with each other for use, but the angle difference can be generated between the N-pole of the front side 8 and the S-pole of the neck side 9 by adjusting an adjusting claw 17. When the angle difference 18 are overlapped by a front side 8 magnet and a neck side 9 magnet, the adjusting claw 17 is opened at an angle by the angle difference 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube apparatus, in which a magnetic part for adjusting an electron beam is arranged at the neck of a color cathode ray tube, and red, green and blue electron beams are controlled by two two-pole plastic magnets. And two 4
The present invention relates to a purity and convergence adjusting device having a function of controlling red and blue electron beams with a polar plastic magnet, and a function of placing red and blue electron beams overlapping four poles on green with two 6-pole plastic magnets.

[0002]

2. Description of the Related Art FIG. 2 is a view showing the structure of a general color picture tube device, which comprises a cathode ray tube 1, a deflection coil 2, a two-pole plastic magnet ring 3, and a magnetic part 4 for adjusting an electron beam. The magnetic component 4 for adjusting an electron beam includes a two-pole plastic magnet 5, a four-pole plastic magnet 6, and a six-pole plastic magnet 7. In some cases, a two-pole plastic magnet 5 is arranged on the deflection coil 2. Further, a two-pole plastic magnet 5 and a four-pole plastic magnet 6, 6 in the magnetic part 4 for adjusting the electron beam.
Some polar plastic magnets 7 also have a different arrangement.

FIG. 3 is a diagram showing an example of a conventional two-pole plastic magnet, in which N poles 10 (and 1) are formed on the front side 8 and the neck side 9 of the two-pole plastic magnet 5.
3) shows the position of the S pole 11 (and 12). Furthermore, N / S on the left and right when the front side 8 and the neck side 9 are overlapped
The overlap between the poles 14 and 15 and the adjusting claw 19 is shown.

The central convergence adjustment in such a color picture tube device is performed by using two ring-shaped plastic magnets 5, 6, 7 each mounted on a CRT neck portion with two poles, four poles, and six poles. , Blue electron beams are adjusted. That is, the red, green and blue beams are adjusted by the two bipolar magnets 5. Two 4
The red and blue beams are adjusted by the extreme plastic magnet 6. Further, the two six-pole plastic magnets 7 have a function of superimposing the electron beam on which the red and blue beams are superimposed by the four-pole plastic magnet 6 on the green beam.

[0005]

However, the spacing between electron beams of red, green, and blue is various due to assembly variations in the production process of the cathode ray tube, and the beam shape differs for each cathode ray tube. Conventionally, in order to adjust a cathode ray tube having such a wide variety of beam shapes, the mounting positions or the amounts of magnetization of the 2-pole, 4-pole, and 6-pole plastic magnets 5, 6, and 7 are changed.

Furthermore, if the center accuracy of the center of the electron beam is too good, there is a problem that the positions of the adjusting claws 19 of the plastic magnet are aligned and the adjustment difficulty increases.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate a change in the mounting position of the adjustment magnet and a change in the amount of magnetization of the adjustment magnet caused by the difference in the electron beam shape for each cathode ray tube. In particular, a cathode ray tube having an electron beam interval can be solved by increasing the magnetic force of the adjusting magnet. However, a cathode ray tube having an electron beam center near zero has a contradictory effect when the magnetic force of the adjusting magnet is reduced. Therefore, the present invention does not change the position of the adjusting magnet and does not change the amount of magnetization of the adjusting magnet even in a cathode ray tube whose electron beam center is near zero, or in a cathode ray tube in which the distance between the red and blue beams is very narrow. The purpose is to be able to respond.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides two-pole purity adjustment of two magnetic poles for adjusting an electron beam attached to a neck portion of a CRT and two four-pole static parts. Two-pole, four-pole, and six-pole ring-shaped plastic magnets for convergence adjustment and two 6-pole static convergence adjustments
For the poles, the front side N (S) pole position and the neck side S
(N) An angle difference is provided at the pole position, so that an effect is exerted on a cathode ray tube having a high center accuracy of the electron beam and a tube having a large variation in the center accuracy.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 of the present invention is described below.
This is a plastic magnet in which an angular difference is provided between the front N (S) pole and the neck S (N) pole of all the 2-pole, 4-pole, and 6-pole plastic magnets of the electron beam adjusting magnetic component. The examples shown in FIGS. 1 and 3 describe the two-pole plastic magnet 5, and the pole positions of the four-pole plastic magnet 6 and the six-pole plastic magnet 7 are naturally different from each other. Further, there is a case in which a two-pole plastic magnet 5 is mounted on the deflection coil 2, which is also an object of the present invention. In addition, the arrangement of the two-pole, four-pole, and six-pole plastic magnets 5, 6, and 7 in the magnetic component for adjusting the electron beam may be different, which is an object of the present invention.

According to a second aspect of the present invention, an angle difference is provided between the front N (S) pole and the neck S (N) pole of the two-pole plastic magnet 5 of the magnetic component for adjusting an electron beam. I say a plastic magnet.

According to a third aspect of the present invention, there is provided a plastic in which an angular difference is provided between the front side N (S) pole and the neck side S (N) pole of the four-pole plastic magnet 6 of the magnetic component for adjusting an electron beam. Say a magnet.

According to a fourth aspect of the present invention, there is provided a plastic magnet in which an angle difference is provided between a front N (S) pole and a neck S (N) pole of a six-pole plastic magnet of a magnetic component for adjusting an electron beam. Say

(Embodiment) FIG. 1 is an example of a two-pole plastic magnet constituting a purity and convergence adjusting device according to an embodiment of the present invention.
An angle difference 16 is provided between the magnetized positions of the N pole 10 and the S pole 11 on the front side 8, and the neck side 9 has the same angle difference 16 as the front side 8. , The angle difference 16 gives an angle difference in opposite directions.

The front side 8 and the neck side 9 are used in an overlapping manner, but when the adjusting pawl 17 is fitted, the front side 8N
An angle difference between pole 10 / neck side 9S pole 12 can be created. When the angle difference 18 is overlapped by the front-side 8 magnets and the neck-side 9 magnets, the adjusting claw 17
Is opened by the angle difference 18. Therefore, it is possible to improve the adjustment workability for an object with high electron beam center accuracy, which is caused by the target cathode ray tube variation.

According to the experimental results according to the present embodiment, as shown in Table 1, it is possible to adjust a cathode ray tube having a high center accuracy in which there is variation between electron beams caused by variation in assembling of the cathode ray tube.

H beam deviation 0.8 mm / V direction deviation
0mm Opening between two poles between brown

[0017]

[Table 1]

[0018]

As described above, according to the present invention, by pre-magnetizing the front and net poles of the plastic magnet in the direction in which the poles are opened, when the CRT with high center beam accuracy is used, no adjustment is required. An angle difference can be obtained by the magnetized position difference, and the opening of the adjusting claw has an effect of improving workability and reducing inconvenience.

[Brief description of the drawings]

FIG. 1 is an example diagram showing a two-pole plastic magnet constituting a purity and convergence adjusting device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a general color picture tube device.

FIG. 3 is an example of a conventional two-pole plastic magnet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CRT 2 Deflection coil 3 2-pole plastic magnet ring 4 Magnetic parts for electron beam adjustment 5 2-pole plastic magnet 6 4-pole plastic magnet 7 6-pole plastic magnet 8 Magnet front side 9 Magnet neck side 10 Front side N pole 11 Front side S Pole 12 Neck side S pole 13 Neck side N pole 14 Front side N pole and neck side S pole overlap state 15 Front side S pole and neck side N pole overlap state 16 Angles associated with change in magnetization position 17, 19 Adjusting claw 18 Angle difference when the front side and neck side are aligned

Claims (4)

[Claims] 1. A magnetic part for electron beam adjustment attached to a neck portion of a cathode ray tube is used for adjusting two bipolar poles, adjusting two quadrupole static convergence, and adjusting two six pole static convergence. The front-side N-pole (S-pole) and the neck-side S-pole (N-pole) of each of the two, four, and six poles of the ring-shaped plastic magnet overlap each other to produce a zero magnetic field and maintain an uncorrected state. , The front-side N-pole (S-pole) and the neck-side S-pole (N-pole) are opened to generate a magnetic field, and the two poles are brought into an adjustment state.
4-pole and 6-pole front N (S) pole positions and neck S
(N) A purity and convergence adjusting device, wherein the magnetic component for adjusting an electron beam having an angular difference between pole positions is used. 2. An electron beam adjusting device for adjusting two-pole purity in two magnetic components for adjusting an electron beam, wherein an angle difference is provided between a front side N (S) pole position and a neck side S (N) pole position. 2. A magnetic component for use in a vehicle.
Purity, convergence adjustment device as described. 3. An electron beam adjusting device in which an angle difference is provided between a front side N (S) pole position and a neck side S (N) pole position for adjusting two 4-pole static convergence among the magnetic components for electron beam adjustment. 2. The purity and convergence adjusting device according to claim 1, wherein a magnetic component is used. 4. An electron beam adjusting device for adjusting a static convergence of two 6-poles in a magnetic component for adjusting an electron beam, wherein an angle difference is provided between an N (S) pole position on a front side and an S (N) pole position on a neck side. 2. The purity and convergence adjusting device according to claim 1, wherein a magnetic component is used.