JP2002304958A - Core for deflector, deflector and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a focus in the peripheral area of a screen by making a distorted magnetic field in the rear of a deflection yoke offset. SOLUTION: The rear end of a saddle type horizontal deflection coil composing a deflection yoke 16 takes the shape of a flat bent part 17B, and a square part 23A or an elliptic part 23B obtained by forming the inside of the flat bent part 17B' of the horizontal deflection coil 17 into a square shape or an elliptic shape so as to offset magnetic flux leaked from the shape of the flat bent part are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflecting device core and a deflecting device mounted on an in-line type cathode ray tube, and a display device such as a television receiver or a computer provided with the deflecting device.

[0002]

2. Description of the Related Art A conventional display device for a television receiver or a computer has a cathode ray tube (hereinafter, referred to as a CRT) 10 disposed in a housing of the display device as shown in FIG.
The CRT 10 includes a panel unit 11 for displaying a display image,
It is composed of a glass tube composed of a funnel-shaped funnel 12 and a cone 14 connecting the funnel 12 and the tubular neck 13. Inside the panel 11, red (R), green (G), and blue ( A phosphor screen (not shown) in which the respective color phosphors of B) are arranged in a predetermined pattern and an aperture grill (not shown) serving as a color selection mechanism are provided. an electron gun 15 which includes is provided on the cone portion 14 (hereinafter referred to as deflection yoke) deflection device for deflecting in-line-shaped electron beam B _R emitted from the electron gun 15, B _G, and B _B 16 is mounted I have.

The electron beam B _R emitted from the electron gun 15,
B _G, B _B is emitted from the tube axis direction of the neck portion 13 (Z-axis direction), the inner surface of the panel 11 by the deflection yoke 16, the horizontal scanning L in the X axis direction, Y axis direction to a vertical scanning V
Is done.

FIG. 9 is a partially cutaway side view of a deflection yoke mounted on the CRT of FIG. 8, and FIG. 11 is a side sectional view of a half of FIG. 9, and a deflection yoke 16 is formed in a funnel shape. A saddle-type horizontal deflection coil 17 is provided inside a separator 19 made of synthetic resin or the like, and a saddle-type vertical deflection coil 18 is provided outside the separator 19.
A funnel-shaped core 20 made of a magnetic material such as ferrite is disposed on the outer periphery of the core. The core 20 further strengthens the magnetic field of the horizontal and vertical deflection coils 17 and 18, and the coma correction coil 22 corrects coma distortion.
5 is provided at the rear (on the side of the electron gun 15) of the deflection yoke 16 in order to correct an assembly error.

The above-described horizontal deflection coil 17 and vertical deflection coil 18 are formed in a saddle shape as shown in FIGS. 10 (A) and 10 (B). FIG. 10A is a perspective view showing a case where the half of the horizontal deflection coil 17 is wound in a saddle shape using a winding die, and the inner and outer radii of the front and rear bend-up portions 17F and 17B are formed in a semicircular shape. FIG. 10B is a horizontal view for reducing deflection power in which the inside and outside shapes of the front bend-up portion 17F are rectangular and the inside and outside radii of the rear bend-up portion 17B are semicircular. The deflection coil 17 is shown.

The front bend-up portion 17F and the rear bend-up portion 17B of the saddle-type horizontal deflection coil 17 have a bend storage portion 19F at the front of the separator 19 as shown in FIG.
The bend-up portion of the saddle-shaped vertical deflection yoke 19 is also disposed between the rear and front walls of the bend storage portions 19F and 19B.

The Z in the tube axis direction (Z-axis direction) of the neck portion 13 of the CRT 10 of the horizontal deflection coil 17 having such front and rear bend-up portions (crossover portions) 17F and 17B.
= 0 position on the reference line of the CRT 10 (origin in the CRT design), and a predetermined distance in the ± X-axis direction to the left and right of Z ₁ , Z ₂ , Z ₃ on the Z-axis behind the rear bend-up portion 17B. , ± X are shown in FIG.

FIG. 13 shows Z at such a measurement point.₁=
-50mm, Z_Two= -55mm, Z _Three= -60mm
The strength of the magnetic field up to ± 15 mm in the ± X-axis direction
This shows the measurement results that have been set.
Of the magnetic field at the left and right ends (L / R) of the ± X axis on the Z axis
It turns out that the change is relatively small.

In contrast to the horizontal deflection coil 17 of the deflection yoke 16 as described above, the rear bend-up portion 17B is provided with a tube of the Z-axis semicircular neck portion 13 of the CRT 10 as shown in FIGS. A saddle-type horizontal deflection coil 17 having a rear flat bend 17B 'extending along the wall toward the electron gun 15 has been proposed. FIG. 14A shows a front bend-up portion 17F having a round shape, and FIG. 14B shows a square saddle-type horizontal deflection coil 17.

FIG. 14 (C) shows the insertion of the round saddle type horizontal deflection coil 17 shown in FIG. 14 (A) into the inner diameter of a separator 19 formed in a funnel shape with round front and rear openings. It is a front view viewed from the front opening side when mounted.
FIG. 14D shows the saddle-type horizontal deflection coil 17 shown in FIG.
Having a front opening formed in a square funnel shape.
FIG. 15 is a front view similar to FIG.

In the separator 19 having the rear flat bend portion 17B 'formed like the horizontal deflection coil described above, FIG.
The horizontal deflection coil 17 is displaced in the direction of arrow A in FIG. 11 because there is no rear bend storage portion 19B shown in FIG. The molded hook portion 19A is inserted, and the front bend up portion 17F of the horizontal deflection coil 17 is welded and fixed to the front bend storage portion 19F of the separator 19 via an adhesive such as hommelt.

The horizontal deflection coil 17 having the flat bend 17B 'described above has the same Z = Z ₁ , Z ₂ ,
A measurement point in the strength of the magnetic field on the ± X axis on Z _3,
The measurement results are shown in FIGS.

According to the above comparison results, when the rear bend-up portion 17B is formed as a flat bend portion 17B ', the magnetic field changes greatly as the distance from the center of the X axis in the ± X-axis direction increases. The magnetic field distortion becomes larger than that in the case of (1).

The core and the deflection yoke may have a magnetic core whose opening end face on the neck side has a circular shape and the inner periphery of the opening end face on the funnel side has a substantially rectangular shape corresponding to the shape of the panel section. It is disclosed in republished patent WO 99/26270.

[0015]

FIGS. 17A and 17B are side sectional views of the vicinity of the rear portion of the horizontal deflection coil 17 provided with the rear bend-up portion 17B and the rear flat bend portion 17B 'as described above. 13B and FIG.
6 will be described.

As shown in FIGS. 17A and 17B, the rear bend-up portion 17B and the rear flat bend portion 17 are provided.
The magnetic field generated from the main winding 17M of the horizontal deflection coil 17 having B ′ has a main magnetic field φ _M and a leakage magnetic field φ as shown by a solid line.
Occurs in the _L direction. On the other hand, the rear bend up section 17B
And main magnetic field phi _M and the leakage magnetic field phi _L from the magnetic field direction together both main winding portion 17M generates a bend field phi _B shown by the broken line generated from the rear flat bend 17B 'is bend field phi _B It occurs in the direction of offset.

Accordingly, the horizontal deflection coil 17 having the flat bend portion 17B 'extending on the electron gun 15 side of the Z axis of the CRT 10 has a bend magnetic field generation center distance for canceling out the leakage magnetic field φ _L with respect to R _2. , Rear bend up part 1
The bend magnetic field generation center position distance R ₁ for canceling the leakage magnetic field φ _L having 7B is R ₁ > R _2, and the magnetic field that the horizontal deflection coil 17 having the flat bend portion 17B ′ cancels works more strongly. effective diameter phi ₁ and phi ₂ of the magnetic field has a φ _1> φ _2.

Therefore, in other words, the fact that the effective diameter φ ₂ of the magnetic field at the end of the saddle-shaped horizontal deflection coil 17 having the rear flat bend portion 17B ′ is small means that the main magnetic field φ _M and the leakage magnetic field φ _L are also distorted magnetic fields as shown in FIG. As shown in FIG. 16 (C), since the distortion is large in a barrel shape, the magnetic field strength changes relatively largely in the ± X-axis direction as shown in FIG.

In order to cancel out such a barrel-shaped distortion magnetic field of the leakage magnetic field φ _L , it is necessary to deform the generated magnetic field φ _M of the main winding 17M into a pin shape.

When considering the deflection yoke 16 as a whole, the CRT 1
0, the convergence takes place over the entire area of the screen of the panel unit 11, but the main winding 17M is used to cancel the leakage magnetic field φ _L.
The main magnetic field φ for a beam of the neck 13 as seen from the panel portion 11 side of the CRT10 as shown in FIG. 18 (A) is _M are making strain field of pin-shaped, red electron beam B _R right of the panel portion 11 of the When viewed from the right side of the panel section 11 due to a large pin distortion, the electron beams B _R , B
_G, red electron beam B _R of B _B is subjected to a large convergence effect by a pin field (vertical magnetic field). Now, when to just focus the high visibility green electron beam B _G, red electron beam B _R becomes the over-focus, blue electron beam B _B is a under-focus red electron beam B electron beam spot B _R of _R ' Becomes larger, and the size of the blue electron beam spot B _B ′ becomes smaller.

A flat bend as shown in FIGS.
Using the horizontal deflecting coil 17 having the ridge 17B '
The image is projected on the panel section 11 of the CRT 10 by the yoke 16.
Red, green and blue electron beams B_R, B_G, B_BIs the panel part 1
For example, as shown in FIG.
Beams in the range of 3cm (depending on the size of the screen)
Pot B_R', B_B′ Depends on the factors described above.
B like 8 (B)_R'> B_B'And the panel part 11
On the left side of the screen, the size B of the beam spot_R', B _B′
B_B'> B_R'.

Another factor that causes the leakage magnetic field φ _{L of the} above-mentioned rear flat bend portion 17B ′ to become a barrel magnetic field as shown in FIG. 17C is that the leakage magnetic field φ _L of FIG. As schematically shown, the canceling magnetic field φ _B1 from the vicinity of the diagonal portion of the circular rear flat bend portion 17B ′ viewed from the rear opening side is larger than the canceling magnetic field φ _B near the Y-axis center. That also contributes.

FIG. 17 (E) is a view similar to FIG. 14 (A) and FIG.
(B) The first quadrant near the offset magnetic field φ _{B1 at the} diagonal part when the leakage magnetic field φ _L at the rear end of the flat bend part 17B ′ when the inner surface shape of the flat bend part 17B ′ is round is viewed in the XY plane. FIG. 17 (E) shows a simulation of the magnetic field direction of FIG. 14 (D), and FIG. 17 (E) shows that the leakage magnetic field φ _LC near the diagonal portion is on the Y axis as described in FIG. 17 (D). On the other hand, it can be seen that it is not perpendicular but greatly inclined in the X-axis direction.

The rear flat bend portion 17B 'disclosed in Japanese Patent Publication No. WO 99/26270 has a circular shape in the XY plane, which is different from the present invention.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a deflection yoke core, a deflection yoke, and a deflection yoke using a flat bend type horizontal deflection coil. The point at which the focus at the left and right ends of the screen on the panel unit of the display device having the above or the corner at the screen corner becomes weak is corrected by making the rear opening of the rear flat bend portion 17B 'a square shape.

The present invention according to claim 1 is a core used for a deflection yoke 16 having a saddle-shaped horizontal deflection coil 17 having a flat bend portion 17B 'at the rear, and formed in a funnel shape. The opening is square or round,
The rear opening has a rectangular shape 25A or an oval shape 25B, and is used as a core for a deflection device.

According to a second aspect of the present invention, there is provided a deflection yoke 16 having a saddle-shaped horizontal deflection coil 17 having a flat bend portion 17B 'at a rear portion thereof.
The deflection yoke is characterized in that the inside of the shape is a square 23A or an oval 23B when viewed from the rear opening side of the horizontal deflection coil 16.

According to a third aspect of the present invention, there is provided a deflection yoke 16 having a saddle-shaped horizontal deflection coil 17 having a flat bend portion 17B 'at a rear portion thereof.
The inner peripheral shape is flat bend portion 17.
Flat such that the distance from the intersection to the other inner periphery is larger than the distance c from the intersection of the Y axis indicating the height direction of B 'and the X axis indicating the width direction to the inner periphery along the Y axis. This is a deflection yoke characterized by having an inner surface shape of a bend portion 17B '.

According to a fourth aspect of the present invention, there is provided the deflection yoke according to the second aspect, wherein a corner portion of the rectangular shape 23A having the flat bend portion shape 17B 'has a predetermined curvature.

According to a fifth aspect of the present invention, there is provided a display device having a built-in CRT 10 having a deflection yoke 16 having a saddle-shaped horizontal deflection coil 17 having a flat bend portion 17B 'at the rear thereof, the flat bend portion 17B'. CRT 1 having a deflection yoke having a rectangular shape 23A or an oblong shape 23B when viewed from behind the horizontal deflection coil 17
0 is provided as a display device.

According to the first to fifth aspects of the present invention, a flat bend-shaped saddle-type horizontal deflection coil is formed, and the rear portion of the core is formed in a square shape or an elliptical shape, so that a pin distortion of a main magnetic field is caused. A core, a deflection yoke, and a display device capable of suppressing an increase in the spot size of the left and right blue and red electron beams on the panel screen and obtaining good focus around the screen are obtained.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A deflection device (deflection yoke) according to the present invention.
A display device including a core, a deflection yoke, and a deflection yoke will be described in detail with reference to FIGS. Note that the same reference numerals are given to the portions corresponding to FIGS.

FIG. 1 is a side view of the present invention showing a half of one embodiment of a deflection yoke corresponding to FIG. 11, and FIGS.
Are perspective views showing various embodiments of a saddle type horizontal deflection coil used in the deflection yoke of the present invention, and AA 'and B in FIGS.
FIG. 5A is a cross-sectional view taken along lines -B 'and CC'.
(B) is a front view when the round flat-bend type horizontal deflection coil and the square flat-bend type horizontal deflection coil shown in FIGS. 4, 2 and 3 are mounted on the round and square separators. FIG. 6 is a perspective view of the magnetic core used in the deflection yoke of the present invention and a rear view of the magnetic core used in the deflection yoke of the present invention, and FIG. 7 is a schematic view for explaining the operation of the present invention.

FIG. 1 is a sectional side view of a part of the deflection yoke 16 mounted on the CRT 10 shown in FIG. 8. The deflection yoke 16 has a saddle inside a separator 19 made of a synthetic resin or the like formed in a funnel shape. A horizontal deflection coil 17 shown in FIG. 2 to FIG. 4 is provided, a saddle-shaped vertical deflection coil 18 is provided outside the separator 19, and a funnel-shaped ferrite or the like is provided around the vertical deflection coil 18. A core 20 made of a magnetic material is provided. The core 20 strengthens the magnetic fields of the horizontal and vertical deflection coils 17 and 18, the ring magnet 21 corrects the assembly error of the electron gun 15, and the frame correction coil 22 corrects the frame distortion.
6 (on the side of the electron gun 15).

A hook 19A is provided on the inner periphery of the rear part of the separator 19, and is inserted into the rear end of the window 17W shown in FIGS. 2 (A), 3 (A) and 4 (A). 1, the horizontal deflection coil 17 is prevented from shifting toward the front opening side of the separator 19 as shown by the arrow B.

FIG. 2 shows a half of the horizontal deflection coil 17 of one embodiment of the present invention inserted inside the separator 19 described above.
(A) and (B). In FIG. 2A, the bend-up portion 17F on the front opening side of the separator 19 (the panel portion 11 side of the CRT 10) is formed in a square shape, and the rear portion is formed on the CRT 10
Is formed as a flat bend portion 17B 'extending flat in the tube axis (Z-axis direction). This flat bend part 17
As apparent from the sectional view shown in FIG. 2B as viewed from the Z-axis direction along the line AA ′ of B ′, the neck portion 1 of the CRT 10 is
3 has a square portion 23A whose inner surface and outer shape in contact with the outer diameter are substantially square.

The front bend-up portion 17F of the half of the saddle type horizontal deflection coil 17 shown in FIGS.
(A) is formed in the same square shape, and the flat bend portion 17 is formed.
This shows another configuration example applicable to the deflection coil of the present invention in which the outer shape of B 'is changed. The flat bend portion 17B' is a view seen from the Z-axis direction along the line BB 'in FIG. 2
As shown in the cross-sectional view of (B), a rectangular portion 23A whose inner surface in contact with the outer diameter of the neck portion 13 of the CRT 10 has a substantially rectangular shape.
And the corner portion has a radius of curvature (R) with a predetermined curvature,
The outer shape of the flat bend portion 17B 'is a substantially semicircular shape or a flat semicircular shape obtained by crushing a semicircular portion.

The half body of the saddle type horizontal deflection coil 17 shown in FIG. 4A shows still another configuration of the present invention. The front bend-up portion 17F has a round shape, and the rear flat bend portion 1 has
The outer shape of 7B 'is formed in a rounded long semicircle, and the CRT
The inner surface of the neck portion 13 in contact with the outer tube is formed as an elliptical or semi-elliptical elliptical portion 23B.

The curved shape of the ellipse 23B or R inside the rear flat bend portion 17B 'is such that the outer tube of the neck portion 13 of the CRT 10 has a radius r ₁ where the outer tube of the neck portion 13A or the long side of the elliptical portion is in contact. Assuming that it is 1, it is more than the value of r ₁ = 1, that is, 1.1
The rectangular portion 23A or the oval portion 23B having the above curvature at the R portion of the corner may be used.

That is, regardless of whether the inside of the flat bend portion 17B 'is rectangular, elliptical, or elliptical, for example, FIG.
When the length a of the radius r ₁ of the Y axis shown in other parts of the square, oval, length b and c to the periphery of the ellipse a <b, a
An inner surface shape having an inner periphery longer than a as in <c> may be selected.

Of the saddle type horizontal deflection coils described above,
FIG. 4A is a front view from the front opening side when the front bend-up portion 17F is inserted and mounted in the separator 19 having the round opening with the round saddle type horizontal deflection coil 17. FIG. 5 (A) shows the rectangular saddle type horizontal deflection coil 17 shown in FIG. 2 (A) and FIG.
FIG. 5B is a front view of the saddle-type horizontal deflection coil 17 when it is inserted and mounted in the inside thereof. When the halves are mounted up and down, they have a substantially oval or square shape.

The window 17W of the saddle type horizontal deflection coil 17
The hook 19A provided on the separator 19 inserted at the end of the rear part prevents the half body of the saddle-type horizontal deflection coil 17 from shifting toward the front opening, and the saddle-type horizontal deflection coil 1
The front bend-up portion 17F of FIG. 7 is hot metal 19D in the front bend storage portion 19F of the separator 19 in FIG.
(B) Similar to FIGS. 5 (D) and 5 (D), they are fixed as shown in FIGS. 5 (A) and 5 (B).

Further, in the deflection yoke 16 of the present invention, the saddle type vertical deflection coil 18 is also provided with the rear flat bend portion 1 as shown in FIG.
8B 'has the same configuration as the saddle-type horizontal deflection coil 17 described with reference to FIGS.
The magnetic core 20 made of ferrite or the like disposed outside of FIG.
(A) As shown in FIG. 6 (B), the funnel-shaped front opening is formed in a square or round shape, and the rear opening is formed as an oblong portion 25B, or FIG.
As shown in FIG. 2D, a magnetic core having a square opening or a round opening at the front portion and a square portion 25B 'at the rear opening is shown in FIGS.
The selection may be made according to the saddle type horizontal deflection coil 17 and saddle type vertical deflection coil 18 selected in (A).

When the saddle-type horizontal deflection coil 17 having the above configuration is used, a canceling magnetic field at a corner inside the rear flat bend portion 17B 'similar to that described with reference to FIGS. 17D and 17E is schematically shown. FIG. 7B shows the simulation result, and FIG. 7A shows the result of the simulation.

That is, the inner shape of the rear flat bend portion 17B 'is rectangular like the rectangular portion 23A or the oval portion 23B, or the radius of the corner and the oval portion is larger than R = r ₁ > 1. In this case, the canceling magnetic field φ _{B1 at the} diagonal portion becomes substantially the same as the canceling effect of the main magnetic field φ _B on the Y axis, and the inner diameter of the flat bend portion 17B ′ is changed to a semicircle as shown in FIG. In this case, the canceling magnetic field component at the diagonal portion can be reduced as compared with the case of the shape. Therefore, the leakage magnetic field φ _L
The main magnetic field phi _M component is likely to appear on the side.

The flat bend portion 1 of the present invention shown in FIG.
The direction of the magnetic field φ _LC at the corner portion when the inside of 7B ′ is formed in a square shape or an elliptical shape is smaller than that in the case where the inside diameter of the flat bend portion 17B ′ in FIG. It can be seen that the direction of the magnetic field on the Y-axis is close to that, and the distortion of the corner portion is improved.

According to the deflecting device core, the deflecting device and the display device having the deflecting device of the present invention, the deflection yoke obtained by the flat bend type horizontal deflection coil can be downsized, the deflection sensitivity can be improved, and the neck shadow margin can be increased. It is possible to obtain a good focus around the screen without reducing the deflection power without deteriorating the effects of the above and without providing a distortion correction means such as a magnet.

[0047]

According to the deflection yoke and the display device having the deflection yoke of the present invention, the following effects can be obtained. 1) The deflection power can be reduced, and good focus can be obtained around the screen. 2) The structural magnetic field distortion can be improved by a simple method without a significant change. 3) It is possible to maintain the productivity improvement because the ferrite core, which is an advantage of flat bend, can be used without being divided. 4) The performance can be improved only by changing the shape of the flat bend portion without requiring a new distortion correction component.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of a deflection yoke according to the present invention.

FIG. 2 is a perspective view of a horizontal deflection coil according to one embodiment used for the deflection yoke of the present invention, and Z along the line AA ′ in FIG. 2 (A).
It is sectional drawing seen from the axial direction.

FIG. 3 is a perspective view of a horizontal deflection coil of another embodiment used for the deflection yoke of the present invention, and a cross-sectional view taken along the line BB 'in FIG.

FIG. 4 is a perspective view of a horizontal deflection coil according to still another embodiment used in the deflection yoke of the present invention, and a cross-sectional view taken along the line Z-C 'of FIG. 4A.

FIG. 5 is a front view of the deflection yoke of the present invention as viewed from the opening side.

FIG. 6 is a perspective view and a rear view of a magnetic core used in the deflection yoke of the present invention.

FIG. 7 is a schematic diagram for explaining a magnetic field distribution and a magnetic field canceling effect inside a flat bend portion of a horizontal deflection coil used in the deflection yoke of the present invention.

FIG. 8 is a perspective view of a cathode ray tube applicable to the display device of the present invention.

FIG. 9 is a side view of a conventional deflection yoke.

FIG. 10 is a perspective view of a horizontal deflection coil used in a conventional deflection yoke.

FIG. 11 is a side sectional view of a half of a conventional deflection yoke.

FIG. 12 is a diagram showing measurement points of the magnetic field strength of the horizontal deflection coil shown in FIG.

13 is an actual measurement graph of measurement points in FIG.

FIG. 14 is a perspective view of another horizontal deflection coil used for a conventional deflection yoke and a front view of the deflection coil.

15 is a diagram showing measurement points of the magnetic field strength of the horizontal deflection coil shown in FIG.

16 is an actual measurement graph of the measurement points in FIG.

FIG. 17 is an explanatory diagram of a generated magnetic field for explaining a magnetic field behind a conventional horizontal deflection coil.

FIG. 18 is an explanatory diagram of a cause of generation of electron beam spots on both sides on a screen.

[Explanation of symbols]

10 ‥‥ cathode ray tube (CRT), 11 ‥‥ panel unit, 14
{Cone part, 15} electron gun, 16} deflection device (deflection yoke), 17} saddle type horizontal deflection coil, 18} saddle type vertical deflection coil, 19} separator, 20} magnetic core

Claims (5)

[Claims] 1. A core used in a deflection device having a saddle-shaped horizontal deflection coil having a flat bend at a rear portion, wherein a funnel-shaped front opening has a square or round shape,
A core for a deflecting device, characterized in that the rear opening has a rectangular or oval shape. 2. A deflection device having a saddle-shaped horizontal deflection coil having a flat bend at a rear portion, wherein the inside of the flat bend portion has a rectangular shape as viewed from the rear opening side of the horizontal deflection coil. Is a deflecting device characterized by having an oval shape. 3. A deflection device in which a rear portion of a saddle-type horizontal deflection coil has a flat bend portion shape, wherein an inner peripheral shape of the flat bend portion shape indicates a height direction of the flat bend portion. The inner surface shape of the flat bend portion such that the distance from the intersection to the inner periphery along the Y-axis is greater than the distance from the intersection of the X-axis indicating the width direction to the inner periphery along the Y-axis; A deflecting device, characterized in that: 4. The deflecting device according to claim 2, wherein the flat corner portion has a predetermined curvature. 5. A display device incorporating a cathode ray tube having a deflecting device in which a rear portion of a saddle-type horizontal deflection coil has a flat bend portion shape, wherein an inside of the flat bend portion shape is the horizontal deflection coil. A display device comprising a cathode ray tube having a deflecting device formed in a rectangular shape or an elliptical shape when viewed from behind.