JPH09298040A - Deflection yoke, or color cathode-ray tube or display using the deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core of high-efficiency and low-cost for a deflection yoke by improving the sensitivity of a horizontal deflection coil, and restraining the heat generation of a deflection yoke. SOLUTION: A deflection yoke comprises a horizontal deflection coil 2, a vertical deflection coil 3 and a core 4. The core 4 covering a portion of the horizontal deflection coil 2 and the vertical deflection coil 3 is divided into an electron gun side core 4b and a phosphor screen side core on the surface perpendicular to the tube axial direction. In this case, the phosphor screen side core extending toward a phosphor screen side has a nearly cylindrical shape, and the electron gun side core 4b is formed to have a long elliptical shape in the horizontal direction crossing the tube axial direction on the surface perpendicular thereto, and the horizontal deflection coil 2 is formed to be thick in the horizontal direction mentioned above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke used in a color cathode ray tube device or a color cathode ray tube device or a display device using the deflection yoke, and more specifically, to a core which is one component of the deflection yoke. It relates to the shape.

[0002]

2. Description of the Related Art A deflection yoke having a non-cylindrical core is disclosed, for example, in Japanese Utility Model Publication No. 62-144053. In this deflection yoke, convex portions are formed at predetermined intervals in the circumferential direction on the electron gun side of the inner surface of the substantially cylindrical core, and horizontal and vertical deflection coils are provided therein.

[0003]

In the case of manufacturing the core as described above, since the core has a non-cylindrical shape which is partially convex, the manufacturing is not easy and the cost is high.

The present invention reduces the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes to improve the sensitivity of the horizontal deflection coil, and at the same time, the horizontal deflection coil in the horizontal axis direction passing through the tube axis in a plane perpendicular to the tube axis direction. By increasing the thickness, the cross-sectional area of the horizontal deflection coil on the electron gun side where the temperature rises the most is increased compared to the conventional horizontal deflection coil, so that heat generation of the deflection yoke is suppressed and a high-performance and low-cost deflection yoke is provided. It is intended to be provided.

[0005]

According to the present invention, in a deflection yoke having a horizontal deflection coil, a vertical deflection coil and a core, a core which covers a part of the horizontal deflection coil or the vertical deflection coil is perpendicular to the tube axis direction. Is divided into an electron gun side core and a phosphor side core, and the phosphor side core has a substantially cylindrical shape that expands toward the phosphor side, and the electron gun side core forms a non-cylindrical shape. is there.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a side view showing the deflection yoke of the present invention partially broken away, and FIG. 2 is a plan view of a core used in the deflection yoke of the present invention. FIG. 3 is a plane aa ′ shown in FIG.
7 is a cross-sectional view of the color cathode ray tube using the deflection yoke of the present invention, and FIG.
FIG. 8 is a schematic view of a display device using the color cathode ray tube shown in FIG. 7.

In the figure, 1 is a deflection yoke, 2 is a horizontal deflection coil, 3 is a vertical deflection coil, 4a and 4b are cores, 5 is a separator, and 6 is a color cathode ray tube.

A first embodiment of the present invention will be described with reference to the drawings. The core used in the deflection yoke 1 shown in FIG. 1 is composed of a substantially cylindrical phosphor screen side core 4a and a non-cylindrical electron gun side core 4b which spread toward the phosphor screen at a plane aa 'perpendicular to the tube axis direction.
Is divided into two. As shown in FIGS. 2 and 3, the electron gun side core 4b divided by the plane aa ′ has an elliptical shape that is longer in the horizontal axis direction than the small diameter end of the phosphor side core 4a. .

In the electron gun side core 4b, as shown in FIG. 3, a horizontal deflection coil 2 and a vertical deflection coil 3 which are thickly wound in the horizontal axis direction passing through the tube axis in a plane perpendicular to the tube axis direction. And a separator 5. The horizontal deflection coil 2, the vertical deflection coil 3 and the separator 5 are formed in the same shape as the conventional one on the fluorescent screen side of the plane aa 'perpendicular to the tube axis direction shown in FIG.

By using the electron gun side core 4b described above, it is possible to reduce the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes, so that the sensitivity of the horizontal deflection coil can be improved. Further, since the horizontal deflection coil can be thickened in the horizontal axis direction, the cross-sectional area of the horizontal deflection coil on the side of the electron gun, which has a large temperature rise, is larger than that of the conventional horizontal deflection coil, so that heat generation of the deflection yoke is suppressed. You can

A deflection yoke 1 composed of the horizontal deflection coil 2, the vertical deflection coil 3, the phosphor screen side core 4a, and the electron gun side core 4b as described above is appropriately provided outside the color cathode ray tube 6 as shown in FIG. It is provided at a position and further attached to a display device including a high voltage circuit, a video circuit, a horizontal deflection circuit and a vertical deflection circuit as shown in FIG.

The fluorescent screen side core 4a and the electron gun side core 4b, which are divided by the plane aa 'perpendicular to the tube axis direction, may be made of different materials.

4 to 6 showing other embodiments described below indicate the same parts as those in FIG. 3 showing the first embodiment, and the explanation thereof will be omitted.

FIG. 4 is a view showing a second embodiment of the present invention, and shows a cross section taken along a plane aa 'perpendicular to the tube axis direction shown in FIG. The projections 7a and 7b are provided above and below the inner surface of the electron gun side core 4b in the vertical axis direction.
By providing the protrusions 7a and 7b, the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes can be made smaller than that in the first embodiment, so that the sensitivity of the horizontal deflection coil can be further improved.

It is also possible to form the conventional cylindrical electron gun side core with the above-mentioned protrusions 7a and 7b. It can be said that such a core has a non-cylindrical shape because it has a protrusion.

FIG. 5 is a view showing a third embodiment of the present invention, and shows a cross section taken along a plane aa 'perpendicular to the tube axis direction shown in FIG. On the inner surface of the electron gun side core 4b,
A winding groove for embedding the winding of the vertical deflection coil 3 is formed. Further, the electron gun side core 4b shown in FIG. 5 is divided into four in the circumferential direction so that it can be easily assembled later. By embedding the vertical deflection coil 3 in the electron gun side core 4b, it is possible to reduce the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes, so that the sensitivity of the horizontal deflection coil can be further improved.

FIG. 6 is a view showing a fourth embodiment of the present invention and shows a cross section taken along a plane aa 'perpendicular to the tube axis direction shown in FIG. On the inner surface of the electron gun side core 4b,
A winding groove for embedding the windings of the horizontal deflection coil 2 and the vertical deflection coil 3 is formed. By embedding the horizontal deflection coil 2 and the vertical deflection coil 3 in the electron gun side core 4b, the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes can be reduced, so that the sensitivity of the horizontal deflection coil can be further improved. .

A horizontal deflection coil 2 and a vertical deflection coil 3 as shown in the third and fourth embodiments are provided with an electron gun side core 4b.
When burying the electron gun side core 4b in four or more, it becomes easy to incorporate the electron gun side core 4b later.

[0020]

According to the present invention, a core that covers a part of the horizontal deflection coil or the vertical deflection coil is divided into an electron gun side core and a phosphor screen side core, and the phosphor screen side core spreads toward the phosphor screen. By making the electron gun side core non-cylindrical, the magnetic resistance of the magnetic path through which the horizontal deflection magnetic field passes can be reduced, and the sensitivity of the horizontal deflection coil can be improved.

Further, since the horizontal deflection coil can be thickened in the horizontal axis direction on the electron gun side, the cross-sectional area of the horizontal deflection coil on the side of the electron gun having a large temperature increase is larger than that of the conventional horizontal deflection coil. It is possible to suppress the heat generation.

Further, even if the electron gun side core has a non-cylindrical shape, it has the same cross-sectional shape, so that it is easy to manufacture, and a high-performance and low-cost deflection yoke can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing a deflection yoke of the present invention.

FIG. 2 is a plan view showing a core used in the deflection yoke of the present invention.

FIG. 3 is a view showing a cross section on the electron gun side of the deflection yoke according to the first embodiment of the present invention.

FIG. 4 is a view showing a cross section on the electron gun side of a deflection yoke showing a second embodiment of the present invention.

FIG. 5 is a view showing a cross section on the electron gun side of a deflection yoke showing a third embodiment of the present invention.

FIG. 6 is a view showing a cross section on the electron gun side of a deflection yoke showing a fourth embodiment of the present invention.

FIG. 7 is a side view showing a mounting position of a deflection yoke of the present invention to a color cathode ray tube.

8 is a diagram showing a configuration of a display device using the color cathode ray tube shown in FIG.

[Description of symbols] 1 deflection yoke 2 horizontal deflection coil 3 vertical deflection coil 4a, 4b core 5 separator 6 color cathode ray tube 7a, 7b core protrusion

Front page continuation (72) Inventor Noritaka Okuyama 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Multimedia system development headquarters (72) Inventor Koji Fukuma 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Ceremony Company Hitachi, Ltd.Multimedia Systems Development Headquarters (72) Inventor Hiroshi Yoshioka 3300 Hayano, Mobara-shi, Chiba Hitachi Electronic Devices Division (72) Inventor Soichi Sakurai 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Incorporated company Hitachi, Ltd. Multimedia system development headquarters (72) Inventor Takanori Ishikawa 1 Kitano, Mashiro, Mizusawa-shi, Iwate Hitachi Media Electronics Co., Ltd.

Claims (9)

[Claims] 1. A deflection yoke comprising a horizontal deflection coil, a vertical deflection coil and a core, wherein a core which covers a part of the horizontal deflection coil and the vertical deflection coil is an electron gun side core in a plane perpendicular to the tube axis direction. A deflection yoke, characterized in that it is divided into a phosphor screen side core, the phosphor screen side core has a substantially cylindrical shape that spreads toward the phosphor screen side, and the electron gun side core has a non-cylindrical shape. 2. A deflection yoke comprising a horizontal deflection coil, a vertical deflection coil and a core, wherein a core which covers a part of the horizontal deflection coil and the vertical deflection coil is an electron gun side core in a plane perpendicular to the tube axis direction. The fluorescent screen side core is divided into a substantially cylindrical shape that spreads toward the fluorescent screen side, and the electron gun side core is long in the horizontal axis direction passing through the tube axis in a plane perpendicular to the tube axis direction. A deflection yoke, wherein the deflection coil is formed in an elliptical shape and the horizontal deflection coil is formed thick in the horizontal axis direction. 3. The deflection yoke according to claim 1, wherein the electron gun side core and the phosphor screen side core are made of different materials. 4. The deflection yoke according to claim 1, wherein the deflection yoke has a pair of protrusions above and below the inner surface of the electron gun side core in the vertical axis direction. 5. The deflection yoke according to claim 1, 2 or 3, wherein a winding groove for embedding a winding of a vertical deflection coil is formed on an inner surface of the electron gun side core. . 6. The deflection yoke according to claim 1, wherein a winding groove for embedding both windings of a vertical deflection coil and a horizontal deflection coil is formed on an inner surface of the electron gun side core. Characteristic deflection yoke. 7. The deflection yoke according to claim 5, wherein the electron gun side core is used in combination by dividing the core into four or more pieces in the circumferential direction. 8. A color cathode ray tube device equipped with the deflection yoke according to claim 1. Description: 9. A display device using the color cathode ray tube device according to claim 8.