KR100215796B1 - Deflection yoke of color cathode ray tube - Google Patents

Abstract

The present invention relates to a deflection yoke of a color cathode ray tube, and is fixed to upper and lower portions of a holder to form a magnetic force line by attaching a magnetic pole to a magnet that serves to correct a top bottom distortion appearing on the upper and lower sides of a screen. As the length of the screen is extended, the top and harvard distortion of the screen are perfectly corrected, and the misconvergence is perfectly corrected, and the screen state is stabilized.

To this end, the present invention is a holder 61 coupled to the outer surface of the funnel (2) of the cathode ray tube, a horizontal deflection coil (62) wound on the holder to deflect the electron beam in the horizontal direction, and wound on the holder (61) Vertical deflection coil 63 for deflecting the electron beam in the vertical direction, and ferrite core coupled to the outside of the holder 61 to prevent the magnetic flux of the horizontal deflection coil 62 and the vertical deflection coil 63 to leak. (64) and a magnet (65) fixed to the upper and lower sides of the funnel side of the holder (61) to correct the upper and lower raster distortions of the screen, the magnetic flux density being equal to the magnets on both sides of the magnet. The magnetic pole 66 is attached to offset the magnetic field of the higher order component while maintaining.

Description

Deflection yoke of colored cathode ray tube

The present invention relates to the field of color cathode ray tube, and more particularly, to a deflection yoke of a color cathode ray tube which serves to deflect an electron beam emitted from an electron gun in a horizontal and vertical direction.

Generally, as shown in FIG. 1, a color cathode ray tube is fixed with a funnel 2 having a neck 3 at the rear of the panel 1, and the neck 3 is fixed. Stem (4) is sealed at the end of the inside to apply the voltage required for the operation while making the interior in a vacuum state, the voltage is applied in the neck portion 3, red, green, An electron gun 5 is incorporated to emit a blue three-color electron beam, and a deflection yoke 6 is provided on the outer circumferential surface neck portion of the funnel to deflect the electron beam emitted from the electron gun 5 in the horizontal and vertical directions. Is installed.

A frame 7 is supported on the inner circumference of the panel 1, and an external magnetic field of the electron beam radiated from the electron gun 5 and deflected by the deflection yoke 6 is provided on the funnel 2 side of the frame 7. An inner shield 8 is fixed to prevent the path of the electron beam from being deformed along the way, and a part of the electron beam passing through the inner shield 8 is passed to the panel 1 side of the frame 7. A shadow mask 9 having a large number of beam passing holes is fixed thereto, and a fluorescent surface 10 is formed on an inner surface of the panel 1 so that an image is formed when an electron beam passing through the shadow mask 9 strikes. Is formed.

The conventional structure of the deflection yoke 6 is a fallopian tube-shaped holder 61 coupled to the outer circumferential surface of the funnel 2, as shown in FIG. A horizontal deflection coil 62 for deflecting the emitted electron beam in the horizontal direction, a vertical deflection coil 63 wound around the outside of the holder 61 and deflecting the electron beam emitted from the electron gun 5 in a vertical direction; A ferrite core 64 coupled to the outside of the holder 61 to prevent the magnetic flux of the horizontal deflection coil 62 and the vertical deflection coil 63 from leaking, and the upper and lower sides of the funnel side of the holder 61. It is composed of a magnet 65 which is fixed to and corrects the Top Bottom Distortion appearing at the top and bottom of the screen.

Therefore, when the device (TV receiver and monitor for various video devices) equipped with the color cathode ray tube is turned on, a high voltage is applied through the stem 4 sealed to the neck 3 of the funnel 2 so that the neck 3 The electron gun 5 embedded in the) operates to emit red, green, and blue three-color electron beams. At this time, current flows into the horizontal deflection coil 62 wound inside the holder 61 of the deflection yoke 6. Therefore, as the magnetic field is generated in the horizontal deflection coil 62, the electron beam emitted from the electron gun 5 is deflected in the horizontal direction by the magnetic field, and the current flows into the vertical deflection coil 63 wound outside the holder 61. As the magnetic field is generated in the vertical deflection coil 63, the electron beam emitted from the electron gun 5 is deflected in the vertical direction by the magnetic field, and the deflected electron beam is fixed to the funnel 2 side of the frame 7. Passed by the inner shield while passing through the inner shield 8 It continues as the deformation prevention is to reach the phosphor screen 10 formed on panel 1 in the deflected state.

In the above, the horizontal deflection coil 62 and the electron beam deflected in the horizontal and vertical directions by the magnetic field of the vertical deflection coil 63 which are radiated by the electron gun 5 to constitute the deflection yoke 6 are the deflection coil 62. Since the magnetic field by (63) alone is difficult to deflect to the fluorescent surface 10 applied to the inner surface of the panel (1), a feride core (64) is used to solve this problem. It can be understood that the magnetic force is increased and thus the electron beam is smoothly reached to the fluorescent surface 10 while the electron beam is deflected in the horizontal and vertical directions.

On the other hand, the above-mentioned electron beam is scattered by hitting the shadow mask 9 fixed to the panel 1 side of the frame 7 almost immediately (about 80%) just before reaching the fluorescent surface 10 and only the remaining (about 20%) is scattered. Color screening is performed by passing through the beam-passing hole of the shadow mask and hitting each of the fluorescent films of the fluorescent screen 10 formed on the inner surface of the panel 1, thereby reproducing a color screen by a combination of three-color electron beams. At this time, the inside of the panel 1 is radiated from the electron gun 5 by the shape of the pincushion type magnetic force lines produced by the magnets 65 attached to the upper and lower sides of the funnel side of the holder 61 constituting the deflection yoke 6. Since the electron beam striking the fluorescent surface 10 is subjected to a force, the raster shape becomes a barrel on the upper and lower sides of the screen, so that the upper and lower raster distortions are corrected within a range that does not cause misconvergence. Accordingly, the pincushion type raster line formed on the screen is unfolded. As a result, the screen becomes more stable overall.

However, the deflection yoke of the conventional color cathode ray tube corrects raster distortions occurring in the upper and lower portions of the screen only by the magnetic force lines of the magnets 65 fixed to the upper and lower portions of the holder 61. As it is narrow as shown in Fig. 3, there is a case that the raster distortion of the upper and lower sides cannot be controlled as a whole, and the magnetic field part due to the harmonic coefficient of the funnel side pincushion type magnetic field of the sudden horizontal deflection coil is inevitably increased, and accordingly, the partial raster Phosphorus depression or protrusion occurs, which is generally referred to as a `` gull wing '' due to higher order magnetic fields than 5th order. This phenomenon becomes difficult to solve in the case of a planar large screen and a wide angle. As shown in (SMC), it appears to be inverted from the center to the outside, so that the image and harster distortion of the screen are perfectly visible. There was a problem that the entire screen state was not stable because the misconvergence phenomenon was not completely corrected.

In particular, as the aspect ratio of cathode ray tube has been widened from 4: 3 to 16: 9 in recent years, when the horizontal center line from the center of the screen is 0 °, the aspect ratio from the center of the screen is to the corner. It can be understood that the above problem becomes even larger, considering that the angle is lowered by 7 ° to 37 ° in the 4: 3 aspect ratio and 30 ° in the 16: 9 aspect ratio on the horizontal center line.

The present invention has been made in order to solve the above problems, and is fixed to the upper and lower parts of the holder to attach a magnetic pole to the magnet that serves to correct the Raster Distortion (Top Bottom Distortion) appearing on the top and bottom of the screen of the magnetic force line As the shape is extended, the image and the raster distortion of the screen are perfectly corrected, and the misconvergence is perfectly corrected, and the screen state is stabilized.

According to the present invention for achieving the above object, a holder coupled to the outer surface of the funnel of the cathode ray tube, a horizontal deflection coil wound on the holder to deflect the electron beam in the horizontal direction, and wound on the holder to deflect the electron beam in the vertical direction A vertical deflection coil coupled to the outer side of the holder, a feride core coupled to the outside of the holder to prevent leakage of the magnetic flux of the horizontal deflection coil and the vertical deflection coil, and fixed to the upper and lower sides of the funnel side of the holder. A deflection yoke of a color cathode ray tube of the present invention is provided in which a magnetic pole is attached to both sides of the magnet to cancel a higher order magnetic field while maintaining the same magnetic flux density as the magnet. .

1 is a longitudinal sectional view schematically showing a colored cathode ray tube;

2 is a longitudinal sectional view showing a deflection yoke of a conventional color cathode ray tube;

3 is a front view showing a deflection yoke of a conventional color cathode ray tube;

Figure 4 is a front view showing a deflection yoke of the present invention colored cathode ray tube

5A is an exemplary view showing a state in which a magnet and a magnetic pole which are components of the present invention are applied to a deflection yoke of a cathode ray tube having a 4: 3 aspect ratio;

5B is an exemplary view showing a state in which a magnet and a magnetic pole which are components of the present invention are applied to a deflection yoke of a cathode ray tube having a 16: 9 aspect ratio;

Explanation of symbols for main parts of the drawings

2. Funnel 61. Holder

62. Water Deflection Coil 63. Vertical Deflection Coil

64. Feride Core 65. Magnet

66. Stimulation

Hereinafter, the present invention will be described in more detail with reference to the attached FIGS. 4 to 5 as an embodiment.

4 is a front view showing a deflection yoke of the color cathode ray tube of the present invention, and FIGS. 5A and 5B are exemplary views showing a state in which magnets and magnetic poles, which are components of the present invention, are applied according to aspect ratios. A fallopian tube-shaped holder 61 coupled to an outer circumferential surface thereof, a horizontal deflection coil 62 wound in a saddle shape inside the holder to deflect the electron beam emitted from the electron gun 5 in a horizontal direction, and the holder 61. ) And a vertical deflection coil (63) for winding the electron beam emitted from the electron gun (5) in the vertical direction, and a horizontal deflection coil (62) and a vertical deflection coil (63) coupled to the outside of the holder (61). Periphery core 64 to prevent magnetic flux from leaking and a magnet 65 fixed to the upper and lower sides of the funnel side of the holder 61 to correct the raster distortion appearing on the upper and lower portions of the screen. In the configuration, the magnet on both sides of the magnet Pole pieces 66 are attached to offset magnetic fields of higher order components while maintaining the same magnetic flux density as that of the stone 65 so that the raster distortion and misconvergence appearing on the upper and lower portions of the screen are the magnets 65. And the magnetic force lines of the stimulus 66.

In the description of the operation of the present invention configured as described above, the description of the same operation as the conventional operation described above is omitted as much as possible. Hereinafter, only the description of the operation of the components related to the stimulus different from the conventional components of the present invention will be described below. same.

The color screen is reproduced as the electron beam emitted from the electron gun 5 is deflected in the horizontal and vertical directions by the deflection yoke 6 and then passes through the shadow mask 9 and hits the inner fluorescent surface 10 of the panel 1. When the magnets 65 attached to the upper and lower sides of the funnel side of the holder 61 constituting the deflection yoke 6 form the shape of a pincushion type magnetic force line, the magnetic poles 66 attached to both sides of the magnet are Since the magnetic field of the higher order component is canceled while maintaining the same magnetic flux as the magnet 65, the line of magnetic force eventually extends, and the width thereof is widened as shown in FIG. 4, thereby correcting the upper and lower raster distortions of the screen and simultaneously The misconvergence pattern due to the higher order magnetic field, which is difficult to correct with a coil such as, is also corrected so that the upper and lower raster distortions of the screen are perfectly corrected within the range that does not cause misconvergence and are formed on the screen accordingly. Is a pincushion type Ras atmospheres become wide spread as a whole screen, it was used than when only the conventional magnet 65 will have a greater sense of security.

When the magnets 65 attached to the upper and lower sides of the funnel side of the holder 61 constituting the deflection yoke 6 form a pincushion type magnetic force line, the magnetic poles 66 attached to both sides of the magnet are magnets. In order to cancel the magnetic field of higher order components while maintaining the same magnetic flux as (65), the width of the line of magnetic force must be kept constant. For this purpose, the sum of the lengths of the magnets 65 and the magnetic poles attached to both sides of the magnets 65 is maintained. It is to be understood that should depend on the aspect ratio of the cathode ray tube.

That is, when the magnet 65 and the magnetic pole 66, which are the components of the present invention, are applied to the deflection yoke of a cathode ray tube having an aspect ratio of 4: 3, the sum of the lengths of the magnet 65 and the magnetic pole 66 is a vertical center line. As a reference, it is preferable that the left and right sides be within a total range of 106 °, each 53 °, and as shown in FIG. 5A, in the cathode ray tube having an aspect ratio of 4: 3, the diagonal and horizontal center lines connecting the corners are left and right. This is because they maintain 37 ° each.

In addition, when the magnet 65 and the magnetic pole 66, which are the components of the present invention, are applied to the deflection yoke of a cathode ray tube having an aspect ratio of 16: 9, the sum of the lengths of the magnet 65 and the magnetic pole 66 is based on the vertical center line. In the cathode ray tube having a 16: 9 aspect ratio as shown in FIG. 5B, the angle between the diagonal line connecting the corners and the horizontal center line is left, right, and 60 °, respectively. This is because they are kept at 30 ° on each side.

As described above, according to the present invention, the width of the ground force line is extended by the magnetic pole attached to the magnet, thereby widening the width thereof. Therefore, the upper and lower raster distortions of the screen are perfectly corrected and simultaneously corrected by a coil such as SMC. Since the misconvergence pattern due to the high order magnetic field is perfectly corrected, the overall screen state is more stable than when using only a conventional magnet.

Claims (3)

A holder coupled to the outer side of the funnel of the cathode ray tube, a horizontal deflection coil wound on the holder to deflect the electron beam in a horizontal direction, a vertical deflection coil wound on the holder and deflecting the electron beam in a vertical direction, and an outer side of the holder It is composed of a feride core coupled to the ferrite core to prevent the magnetic flux of the horizontal deflection coil and the vertical deflection coil to leak, and a magnet which is fixed to the upper and lower portions of the funnel side of the holder to correct the upper and lower raster distortion of the screen. In; The deflection yoke of the color cathode ray tube, characterized in that the magnetic pole is attached to both sides of the magnet to cancel the magnetic field of higher order components while maintaining the same magnetic flux density as the magnet. The method of claim 1, A deflection yoke of a color cathode ray tube, characterized in that the total length of a magnet and a magnetic pole falls within a total 106 ° range of 53 ° from the left and right of the vertical center line to correspond to a 4: 3 aspect ratio cathode ray tube. The method of claim 1, A deflection yoke of a color cathode ray tube, characterized in that the total length of the magnet and the magnetic pole is within a total range of 120 °, 60 ° from the left and right of the vertical center line, to correspond to a 16: 9 cathode ray tube.

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