JP2547008Y2 - Deflection yoke - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke which is mounted on a color picture tube of an in-line arrangement and has a pair of vertical magnetic field correctors for correcting misconvergence near an opening on an electron gun side.

[0002]

2. Description of the Related Art When, for example, a saddle / saddle type deflection yoke having both horizontal deflection coils and vertical deflection coils is mounted on a color picture tube having an in-line arrangement, an image is displayed on the screen in a downward direction as shown in FIG. Vertical misalignment convergence of side beams R and B was occurring. This misconvergence occurs due to an assembly error of the deflection yoke, a variation in the winding distribution of each deflection coil, or a variation in the assembly of the color picture tube itself. In general, the correction of the vertical misalignment convergence is performed by adjusting a variable resistor VR1 connected to the middle point of a pair of vertical deflection coils V1 and V2 connected in series as shown in FIG. , V2 are changed differentially to change the magnetic force by the vertical deflection magnetic field acting on each of the side beams R and B.

[0003]

In a conventional deflection yoke, a variable resistor or a fixed resistor having a small resistance change due to a temperature change is used to correct vertical misalignment convergence of side beams R and B in a downward direction on a screen. Must be disposed on the deflection yoke side, and there are problems that the number of assembly steps is increased and that the deflection yoke is expensive.

An object of the present invention is to provide a less expensive deflection yoke can be corrected vertical displacement misconvergence side beams by a simple means.

[0005]

An in-line color image receiving apparatus comprising a pair of horizontal deflection coils housed on the inner peripheral surface of a cylindrical coil separator and a pair of vertical deflection coils mounted on the outer peripheral surface of the coil separator. the electron gun side opening near the E-shaped magnetic core of the deflection yoke mounted on a tube or rod-shaped magnetic core legs pair of vertical magnetic field compensator auxiliary coil is wound through the coil bobbin, the is, the corrector Of magnetic core legs are arranged facing each other so as to sandwich both side beams in an in-line arrangement
Is a this current vertical deflection period is flow into the auxiliary coil
The vertical deflection magnetic field in the opposite direction of the vertical correction magnetic field from the magnetic core legs, or vertical deflection magnetic field in the opposite direction and the deflection yoke same direction misconvergence vertical correction magnetic field is caused to occur is so that configured corrected in coil bobbin 7 the auxiliary coil 4 is provided with a magnetic core leg portion insertion hole 10 which is slightly larger than the cross-sectional dimension of the magnetic core legs are wound is Rutotomoni inserted, the electron gun side near the coil separator 3 co <br/> fixed is brought into yl separator 3, and the magnetic core 5 is constituted is slidably disposed has been deflection yoke in the lateral direction of the coil bobbin 3 by the elastic coil bobbin engaging member 6 which is integrally formed with You.

[0006]

[Action] mainly vertical correction magnetic field distribution generated from the magnetic core legs acting on the side beams are varied in a sliding magnetic core, a change in vertical force for each side beams
This corrects the vertical misalignment convergence of the side beams.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a view of the deflection yoke of the present invention viewed from the electron gun side, FIG. 2 is an explanatory view of the operation of the vertical correction magnetic field of the deflection yoke of the present invention, and FIG. 3 is a perspective view showing a coil bobbin locking member provided on the deflection yoke of the present invention. is there.

In the deflection yoke of the present invention, a pair of horizontal deflection coils (not shown) are accommodated in the inner peripheral surface of a coil separator 3 assembled in a cylindrical shape.
A toroidal vertical deflection coil 8, 8 wound around a pair of semi-cylindrical magnetic cores 9, 9 is mounted on the outer peripheral surface of the coil. A plurality of elastic locking members 6 for locking and fixing the coil bobbin 7 are formed integrally with the coil separator 3 in the vicinity of the electron gun side opening of the coil separator 3.

An auxiliary coil 4 connected in series with the vertical deflection coil 8 to generate a vertical correction magnetic field has a magnetic core leg having a hole size slightly larger than the cross-sectional dimension of each leg 5A of the E-shaped magnetic cores 5,5. The coil bobbin 7 is wound around a coil bobbin 7 having an insertion hole 10, and each flange portion is locked and fixed to the coil separator 3 by a plurality of locking members 6.

Incidentally, the coil bobbin 7 may be bonded and fixed to the locking member 6.

Also, legs 5A, 5A of a pair of E-shaped magnetic cores 5, 5 are provided.
Are respectively inserted into the magnetic core leg insertion holes 10, 10 of the coil bobbins 7, 7 so that the legs 5A, 5A face each other to form a pair of vertical magnetic field correctors 1, 1. Here, the dimension of the magnetic core leg insertion hole 10 of the coil bobbin 7 is only slightly larger than the cross-sectional dimension of the E-shaped magnetic core leg 5A.
The V-shaped magnetic core 5 is slidably mounted on the coil bobbin 7 in the left-right direction.

[0012] The thus constructed deflection yoke 2 is mounted in the color <br/> over kinescope, the current of the vertical deflection period is flow into the auxiliary coil 4, 4, the vertical magnetic field correction at the time of the screen upper deflection Container 1,
1 vertical correction field such as an arrow in FIG. 2 are generated as viewed from the screen side from, the magnetic force the vertical correction magnetic field acts on the electron beams, the screen vertical direction of the coma aberration caused by the difference in sensitivity of each beam Will be corrected.

Here, one leg of the E-shaped magnetic cores 5,5 is further provided.
When 5A is slid to approach the side beams B, side beams Ri Na greater than the magnetic flux density φR of vertical correction magnetic field flux density φB of vertical correction magnetic fields acting acts on the side beam R to B, the side beams The vertical magnetic force FB acting on B acts on the side beam R in the vertical direction
What Do greater than FR, as in FIG. 5 (b), the side beams result the side beam B can be corrected vertical shift misconvergence of the upper with respect to R, the unbalance of misconvergence which remains on the screen vertical axis Is corrected.

Similarly, when deflecting the lower side of the screen, the side beam B
The magnetic force FB due to the vertical correction magnetic field acting on the side beam R
Is larger than the magnetic force FR acting on the side beam R
, The vertical misalignment convergence in which the side beam B is on the lower side is corrected.

FIGS. 4A and 4B are views of another embodiment of the present invention as viewed from the electron gun side and the screen side. In this embodiment, a pair of perpendicular magnetic field correctors 1 and 1 are
And a pair of vertical auxiliary coils wound on coil bobbins 7,7
4,4 consists of a pair of vertical magnetic field correction device 1,1 is connected to the vertical deflection coils 8, 8 so as to generate a reverse magnetic field and the vertical deflection magnetic field.

Then, the leg 5A of the bar-shaped magnetic core 5 on the side beam B side is slid toward the side beam B side, and the side beam B
By increasing the magnetic flux density φB due to the vertical correction magnetic field acting on the side beam R to be larger than the magnetic flux density φR acting on the side beam R, the current remains only when the current of the vertical deflection cycle is supplied to the vertical auxiliary coils 4, 4. The imbalance of misconvergence on the Y axis is corrected.

[0017]

[Effect of the invention] Thus, the deflection yoke of the present invention can correct the imbalance of the misconvergence on the screen Y axis with a simple structure, inexpensive deflection yoke having excellent image quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a view of the deflection yoke of the present invention as viewed from the electron gun side.

FIG. 2 is an explanatory view of the operation of the vertical correction magnetic field of the deflection yoke of the present invention.

FIG. 3 is a perspective view of a main part showing a configuration of a locking member of a coil bobbin provided on the deflection yoke of the present invention.

FIG. 4 is an explanatory view showing another embodiment of the present invention.

FIG. 5 is an explanatory diagram of vertical misalignment convergence on a screen.

FIG. 6 is a diagram showing a conventional example of a vertical misalignment convergence correction circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical magnetic field corrector 2 Deflection yoke 3 Coil separator 4 Auxiliary coil 5 Magnetic core 5A Magnetic core leg 6 Locking member 7 Coil bobbin 8 Vertical deflection coil 9 Magnetic core 10 Magnetic core leg insertion hole

Claims (1)

(57) [Scope of request for utility model registration] The present invention comprises a pair of horizontal deflection coils housed on an inner peripheral surface of a cylindrical coil separator and a pair of vertical deflection coils mounted on an outer peripheral surface of the coil separator, and is mounted on a color picture tube having an in-line arrangement. that the electron gun side opening near the E-shaped magnetic core of the deflection yoke or rod core legs pair of vertical magnetic field compensator auxiliary coil is wound through the coil bobbin, the is, core legs of the corrector parts are opposed so as to sandwich both side beams of inline, by the current of the vertical deflection period is flow in the auxiliary coil, the magnetic core vertical deflection magnetic field from the leg portion in the opposite direction of the vertical correction field,
In or vertical deflection magnetic field in the opposite direction and the deflection yoke perpendicular correcting magnetic field in the same direction is so that configured the corrected misconvergence is caused to originating <br/> production, inserted together with the auxiliary coil 4 is wound Magnetic core
Magnetic core leg formed slightly larger than the cross-sectional dimension of the leg
Co Irubobin 7 provided with the insertion hole 10 is fixed to the coil separator 3 brought by the elastic coil bobbin <br/> down the locking member 6 which is integrally molded on the electron gun side near the coil separator 3
It is, and the deflection yoke the magnetic core 5, characterized in that it is slidably disposed in the lateral direction of the coil bobbin 7.