JP2000277036A - Deflection york - Google Patents

Abstract

PROBLEM TO BE SOLVED: To variably correct misconvergence of HCR(Horizontal Center Raster) by moving a magnetic body. SOLUTION: This deflection york is constituted so that a pair of magnetic bodies 15 placed at neck-side bend part of the deflection york 10 are guided by a slide guide 18 attached to a separator 19 and moved against a neck of a CRT symmetrically in the direction of the Y-axis by moving a slide holder 16 having a cut groove 16a engaging with projected bodies 15a of the magnetic bodies 15. Thereby misconvergence of HCR can be corrected easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cathode ray tube (CR)
T) The present invention relates to a deflection yoke having a saddle-type horizontal deflection coil suitable for application to an apparatus or the like. More specifically, the position of a pair of magnetic materials disposed at the neck-side bend of the cathode ray tube for correcting the horizontal deflection magnetic field can be moved symmetrically with respect to the neck of the cathode ray tube, so that the HCR can be easily moved. The present invention relates to a deflection yoke that enables variable correction of misconvergence.

[0002]

2. Description of the Related Art In a deflection yoke of a CRT device, generally, in order to concentrate three electron beams of red, green and blue (R, G, B) over the entire screen, a horizontal deflection magnetic field is used as a pincushion magnetic field and a vertical deflection magnetic field is used. A coil is wound so that the deflection magnetic field is a barrel magnetic field. In recent CRTs, stronger magnetic field distortion is required by widening the angle to reduce the depth of the device or flattening the panel.

When a pincushion magnetic field is formed by a horizontal deflection coil, an HCR (Horizontal Center Raster) misconvergence pattern appears. (See FIG. 7) This HCR misconvergence can be solved by winding the panel side opening of the horizontal deflection coil so that a pincushion magnetic field is formed, and winding the neck side so that a barrel magnetic field is formed. You. However, if winding is performed so that the panel-side opening of the horizontal deflection coil has a strong pincushion magnetic field, the influence is exerted to the neck side, and it is difficult to make the neck side a barrel magnetic field. Therefore, conventionally, a pair of magnetic pieces are arranged above and below the Y-axis of a neck-side bend portion, and a barrel magnetic field is formed on the neck side.

[0004]

Heretofore, this pair of magnetic members has been fixed to the neck side bend of the horizontal deflection coil. Therefore, HCR misconvergence cannot be variably corrected. However, due to the demand for higher precision, variations in HCR misconvergence cannot be ignored. Accordingly, an object of the present invention is to provide a deflection yoke that enables variable correction of HCR misconvergence.

[0005]

SUMMARY OF THE INVENTION A deflection yoke according to the present invention has a saddle-type horizontal deflection coil, and a pair of magnetic members is provided above and below a Y-axis of a neck side bend portion of the horizontal deflection coil. And a guide means provided on the neck side bend portion for guiding the movement of the magnetic body along the Y axis, and a slide holder for moving the pair of magnetic bodies symmetrically with respect to the neck of the cathode ray tube. is there. For example, the pair of magnetic bodies each have a protrusion, the slide holder has a pair of inclined cut grooves for fitting the protrusions of the pair of magnetic bodies, and by moving the slide holder in the X-axis direction, A pair of magnetic bodies are moved along the Y axis. In the present invention, the position of the pair of magnetic bodies can be moved symmetrically with respect to the neck of the cathode ray tube by operating the slide holder. This facilitates variable correction of HCR misconvergence.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overview of a CRT device according to an embodiment of the present invention. The CRT 1 includes a panel section, a neck section, and a funnel section connecting them. A deflection yoke 10 is disposed at a connection between the neck and the funnel. Also,
FIG. 2 is a view of the deflection yoke 10 shown in FIG. 1 as viewed from the side. This deflection yoke 10 is a so-called saddle-saddle type deflection yoke.

The deflection yoke 10 includes a horizontal deflection coil 10H for forming a deflection magnetic field, a vertical deflection coil 10V, a core 12, a separator 19 used for winding the deflection coil,
A pair of magnetic members 15 used for correcting the horizontal deflection magnetic field and arranged based on the separator 19, a slide holder 16 for holding the position of the magnetic members 15, a neck-side bend portion, correction magnets 17, and the like. The back cover 20 is provided. The back cover 20 has an opening 20 for moving the position of the slide holder 16 (see FIG. 5C).
a, and the opening 20 a is provided with the slide holder 16.
The portion of the handle 16c (see FIG. 5C) is exposed and is supported. 3A (a side view) and FIG. 3B (a plan view as viewed from the neck side) show the pair of magnetic members 15 described above.
Indicates the position where. Although the figure shows only the upper half from the center, a pair of magnetic bodies 15 are arranged above and below the Y-axis of the neck-side bend.

Next, the magnetic field effect of the magnetic body 15 will be described. FIG. 4A shows a magnetic field distribution by the horizontal deflection coil when the magnetic body 15 is not provided, which is a pincushion magnetic field. With this deflection magnetic field, the HCR misconvergence pattern shown in FIG. 7 appears as described above. When the magnetic material 15 is provided above and below the Y axis in the pincushion magnetic field, a hexapole component as shown in FIG. 4B is added, and the magnetic field acting on the green beam is reduced, so that the HCR misconvergence can be corrected. . Further, by displacing the pair of magnetic bodies 15 symmetrically along the Y axis, the action of the magnetic bodies 15 on the deflection magnetic field can be adjusted.

Next, a mounting portion of the magnetic body 15 will be described. FIG. 5A shows an overview of the magnetic body 15. The magnetic body 15 has a projection body 15a for fitting into an inclined cut groove 16a of a slide holder 16 to be described later, and a projection head 15b used for locking means. FIG. 5B is a view of the magnetic body 15 mounted on the basis of the separator 19 around which the deflection coil is wound, as viewed from the neck side. As shown in FIGS. 5B and 5D, the magnetic body 15 is guided by a slide guide 18 provided on the separator 19 and slides only in the guide direction (Y-axis direction). FIG. 5C shows an overview of a slide holder 16 that is fitted to the magnetic body 15 and used to hold or shift the position of the magnetic body 15. The slide holder 16 is provided with a pair of inclined cut grooves 16 a for fitting with the projection body portions 15 a of the pair of magnetic bodies 15. Further, a fitting hole 16b is formed at one end of the cut groove 16a to allow the projection head 15b of the magnetic body 15 to pass therethrough when the magnetic body 15 is fitted.
The slide holder 16 has a handle 16c for moving its own position. This slide holder 16
As shown in FIG. 5D, the cut groove 16a is fitted into the projection body 15a of the magnetic body 15, and is held between the slide guide 18 and the projection head 15b.

Next, the movement of the position of the magnetic body 15 by the slide holder 16 will be described. FIG. 6A shows a state in which the magnetic body 15 is at a position (inner) closest to the deflection area. To move the position of the magnetic body 15 to the outer peripheral side, the handle 1 of the slide holder 16 is moved as shown by the arrow in the figure.
6c to the right along the X axis. When the slide holder 16 is moved to the right (outer peripheral side) along the X axis, the magnetic body 15 slides to the outer peripheral side along the cut groove 16 a of the slide holder 16 and the slide guide 18 provided on the separator 19. Is done. FIG. 6B is a diagram showing a state in which the magnetic body 15 is moved to the outermost side by this movement.

As described above, in the present embodiment, the position of the pair of magnetic members 15 is moved symmetrically with respect to the neck of the CRT 1 by moving the slide holder 16 in the horizontal direction along the X axis. And the variable correction of the HCR misconvergence can be easily performed.

In the embodiment described above, the magnetic material 1
5 is attached to the separator 19 around which the deflection coil is wound by using the slide guide 18, but the back cover 20 covering the neck-side bend portion is used, and a base member and the like are added to the same. It may be attached by such a method.

[0013]

According to the present invention, the positions of the pair of magnetic members disposed at the neck side bend portion of the cathode ray tube for correcting the horizontal deflection magnetic field can be moved symmetrically with respect to the neck of the cathode ray tube. Thus, the variable correction of the HCR misconvergence can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overview of a CRT device.

FIG. 2 is a diagram showing an overview of a deflection yoke.

FIG. 3 is a diagram illustrating a position of a magnetic body.

FIG. 4 is a diagram for explaining a horizontal deflection magnetic field.

FIG. 5 is a diagram for explaining a mounting portion of a magnetic body.

FIG. 6 is a diagram for explaining position movement of a magnetic body.

FIG. 7 is a diagram for explaining an HCR misconvergence pattern.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CRT, 10 ... deflection yoke, 10H ... horizontal deflection coil, 10V ... vertical deflection coil, 15 ... magnetic body, 1
6 slide holder, 16a cut groove, 18 slide guide, 19 separator

Claims (2)

[Claims] 1. A deflection yoke having a saddle-type horizontal deflection coil and a pair of magnetic members provided above and below a Y-axis of a neck-side bend portion of the horizontal deflection coil, the deflection yoke being provided on the neck-side bend portion; The Y of the magnetic material
A deflection yoke comprising: guide means for guiding movement along an axis; and a slide holder for moving the pair of magnetic bodies symmetrically with respect to a neck of a cathode ray tube. 2. The pair of magnetic bodies each have a projecting portion, the slide holder has a pair of inclined cut grooves for fitting the projecting portions of the pair of magnetic materials, and the slide holder is moved in the X-axis direction. 2. The deflection yoke according to claim 1, wherein the pair of magnetic members are moved along the Y axis by moving the pair of magnetic members.