KR20020069422A - Deflection Yoke for Braun tube - Google Patents

Abstract

PURPOSE: A deflection yoke for a CRT is provided to reduce dispersion of deflection yoke and allow assembly work to be easily performed, by arranging a fixing guide for coupling a main ferrite core and an auxiliary ferrite core. CONSTITUTION: A deflection yoke comprises a horizontal deflection coil and a vertical deflection coil for deflecting electron beam emitted from an electron gun in horizontal and vertical directions; a ferrite core(100) having a main ferrite core(110) for improving a magnetic efficiency by reducing loss of magnetic force generated from horizontal and vertical deflection coils and an auxiliary ferrite core(120) coupled to left and right sides of the main ferrite core; and a holder for fixing the horizontal and vertical deflection coils and the ferrite core to predetermined positions, and insulating the horizontal deflection coil from the vertical deflection coil. The auxiliary ferrite core has guide protrusions formed at both sides of the ferrite core, in such a manner that guide protrusions correspond to fixing protrusions(131) of a fixing guide(130). The fixing guide for fixing the auxiliary ferrite core to the main ferrite core, is mounted to the main ferrite core.

Description

Deflection Yoke for Braun tube {Deflection Yoke for Braun tube}

The present invention relates to a deflection yoke of a CRT, specifically, a guide for fixing to facilitate assembling of an auxiliary ferrite core to a ferrite core, in which a juferrite core and an auxiliary ferrite core applied to improve deflection sensitivity are assembled and formed. The present invention relates to a deflection yoke for a CRT to impart and reduce dispersion and improve workability.

In general, a color cathode ray tube uses an in-line electron gun, and in the cathode ray tube using the in-line electron gun, three electron beams of red (R), green (G), and blue (B) are arranged side by side horizontally. In order to converge the three electron beams at one point of the fluorescent surface, the deflection yoke of the cathode ray tube applies a self-converging using a non-uniform magnetic field.

As shown in FIG. 1, the structure of the color cathode ray tube includes a panel 1 mounted on the front surface of the cathode ray tube and a red (R), green (G), and blue (B) surface on the inner surface of the panel 1. A fluorescent mask 3 coated with a phosphor, a shadow mask 2 having a color discriminating function of an electron beam incident on the fluorescent surface 3 behind the fluorescent surface 3, and a rear surface of the panel 1 A funnel 6 mounted to maintain the interior in a vacuum state, an electron gun 5 mounted inside a tubular neck portion retracted to the rear of the funnel 6, and emitting an electron beam and an outside of the funnel 6 And a deflection yoke 40 provided to deflect the electron beam in a horizontal or vertical direction.

2 is a configuration diagram of a deflection yoke according to the related art, and FIG. 3 is a left side view of FIG. 2.

As shown in Figs. 2 and 3, the deflection yoke 40 of the prior art has a pair of horizontal deflection coils 41 for horizontally deflecting the electron beam emitted from the electron gun inside the cathode ray tube; Used to improve the deflection efficiency by reducing the loss of magnetic force generated by the vertical deflection coil 42 and the current flowing through the horizontal 41 and the vertical deflection coil 42 to deflect the electron beam in the vertical direction. The conical ferrite core 44 and the horizontal deflection coil 41, the vertical deflection coil 42, and the ferrite core 44 to determine the mechanical relative position while fixing, coupling and the horizontal deflection Holders 43, which serve to insulate between the coil 41 and the vertical deflection coil 42, and which can be combined with the cathode ray tube to be applied at the same time, are mainly installed on the neck side of the holder 43. A coma free coil 45 for improving comma aberration generated by a straight barrel type magnetic field is installed on the neck side of the holder 43, and the cathode ray tube and the deflection yoke 4 are mechanically It consists of a ring band (46) for coupling, and a magnet (47) mainly installed at the end of the opening of the deflection yoke and used to correct raster distortion (hereinafter referred to as 'distortion') on the screen.

In particular, since the deflection yoke for the RAC type CRT is formed in a rectangular shape, the distance from the electron beam is closer than that of the circular deflection yoke, so that the deflection sensitivity can be improved.

4 is a schematic perspective view of a ferrite core of the prior art and FIG. 5 is an assembly conceptual view of FIG. 4.

2 to 5, in order to improve the deflection sensitivity, in particular, the horizontal 41 and the vertical deflection coils 42 have a deflection yoke in the form of an RAC, and the ferrite core 44 It consists of the juferrite core 44a and the auxiliary ferrite core 44b.

The shape of the main ferrite core (44a) is formed in a circular shape of the inner and outer surfaces and the shape of the auxiliary ferrite core (44b) is a vertical deflection coil (44) composed of a rectangular or trapezoidal shape having a constant thickness ( In the neck part of which the outer shape of 42) has a non-circulation rate of 0.3 or less, only the middle region m is used for juferrite, and the region s from the middle portion where the non-circulation starts to the screen side is juferrite core 44a. The deflection yoke 40 is configured by attaching the auxiliary ferrite core 44b after cutting a portion of the upper and lower parts having an angle formed by the horizontal axis of the upper and lower predetermined angles. A deflection yoke is constructed to improve errors and reduce material costs for ferrite cores.

However, the above-described ferrite core of the prior art has the following problems.

The ferrite core 44 of the prior art, in particular, as shown in Figures 4 and 5, in order to improve the characteristic distribution due to the dimensional deviation, the shape of the juferrite core 44a by dividing the ferrite core into two cores The inner and outer surfaces have a circular shape, and the auxiliary ferrite core 44b has a rectangular or trapezoidal shape having a predetermined thickness, and then the outer surface of the vertical deflection coil 42 has a non-circulation rate. In the neck portion of 0.3 or less, the juferrite core 44a is used for the middle region m, and the region s extending from the middle portion where the non-circulation starts to the screen side is part of the upper and lower sides of the juferrite core 44a. That is, the deflection yoke 40 is formed by cutting the juferrite core 44a of the portion where the angle formed with the horizontal axis of the deflection yoke is greater than or equal to the predetermined angle to attach the auxiliary ferrite core 44b. Due to the dimensional deviation of each ferrite core inner surface 44 is a deflection yoke configured to reduce the material cost of the convergence error and the distortion and improved ferrite core.

As shown in FIG. 4, the juferrite core 44a has a circular shape unlike the existing rectangular ferrite core, that is, the inner diameter of the ferrite core is polished because the inner diameters of the left and right sides and the top and bottom sides are the same. Through the process, the inner surface deviation can be made high precision of 0.02mm or less, so that not only high-ferrite ferrite core characteristics can be obtained, but also yield improvement of about 3 times compared to the conventional rectangular ferrite core in terms of production yield. .

In addition, the auxiliary ferrite core (44b) is composed of a rectangular or trapezoidal simple shape with no curvature having a constant thickness, the width of the secondary ferrite core (44a) or more than the inner surface width and the length in the tube axis direction juferrite It is comprised so that it may have length as much as the area | region from the screen side edge part to which the non-circularization of the core 44a starts to an intermediate part.

The assembling method of the juferrite core 44a and the auxiliary ferrite core 44b thus constructed is as follows.

First, after cutting the corresponding area s extending from the screen-side end, which is the site where the sub-ferrite core 44b is to be bonded, that is, the sub-ferrite core 44b to the middle part in the tube axis direction, the sub-ferrite core 44b ) Is correctly attached to the cutting surface of the juferrite core 44a using an adhesive or the like.

Then, the horizontal deflection magnetic field passing through the juferrite core 44a is passed through the secondary ferrite core 44b where the auxiliary ferrite core 44b is attached to form a horizontal deflection magnetic field similar to the rectangular ferrite core. It can be implemented.

However, the prior art of the configuration method is because there is no fixing guide when combining the juferrite core (44a) and the auxiliary ferrite core (44b) when the coupling degree is lowered, resulting in a larger dispersion of the deflection yoke, workability is lowered There was a difficulty.

The present invention has been made to solve the above problems,

An object of the present invention, in the ferrite core formed by coupling the auxiliary ferrite core to the juferrite core, to give a fixing guide for the coupling of the auxiliary ferrite core to the juferrite core to reduce the dispersion during the coupling, so as to facilitate the assembly operation To provide a deflection yoke for a CRT.

1 is a schematic configuration diagram of a typical cathode ray tube and a flat yoke.

2 is a schematic configuration diagram of a deflection yoke of the prior art,

3 is a right side view of FIG. 2;

4 is a perspective view of a ferrite core according to the prior art.

5 is an assembly conceptual view of FIG. 4.

6 is an assembled perspective view of a ferrite core according to an embodiment of the present invention.

7 is a side view of FIG. 6;

8 is a perspective view showing a fixing guide configuration according to an embodiment of the present invention.

9 is a perspective view of the auxiliary ferrite core according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: panel 2: shadow mask

3: fluorescent surface 5: electron gun

6: funnel 40: deflection yoke

41: horizontal deflection coil 42: vertical deflection coil

43: holder 44: ferrite core

44a: juferrite core 44b: auxiliary ferrite core

45: comma-fury coil 46: ring band

47: magnet 100: ferrite core of the present invention

110: juferrite core 120: secondary ferrite core

121: guide protrusion 130: fixing guide

131: fixing step 132: coupling part

Deflection yoke for the CRT according to the present invention for achieving the above object,

Horizontal and vertical deflection coils for deflecting the electron beam emitted from the electron gun horizontally or vertically, and juferrite cores having a curved surface on the inner surface thereof to increase magnetic efficiency by reducing loss of magnetic force generated from the horizontal and vertical deflection coils. Ferrite core Ferrite core consisting of a secondary ferrite core protrudingly coupled to the left and right, and the horizontal, vertical deflection coil and the ferrite core fixed to a predetermined position and made of a holder for insulation between the horizontal deflection coil and the vertical deflection coil, In a deflection yoke for an RA (C) type CRT which is installed to deflect an electron beam in a horizontal or vertical direction,

The auxiliary ferrite core of the ferrite core is formed by forming a guide protrusion corresponding to the fixing guide described later,

And a fixing guide for fixing the auxiliary ferrite core to the juferrite core to the juferrite core.

In addition, as an embodiment of the present invention, the fixing guide is preferably provided with a fixing step for fixing the secondary ferrite core, and the coupling portion for mounting fixed to the outer surface of the juferrite core.

Hereinafter, an embodiment of the CRT deflection yoke of the present invention will be described in more detail with reference to the accompanying drawings.

6 is a perspective view of a ferrite core 100 according to the present invention, Figure 7 is one side view of FIG. 6 and 7, the deflection yoke for a CRT of an embodiment according to the present invention is generated from horizontal and vertical deflection coils for horizontally or vertically deflecting an electron beam emitted from an electron gun, and from the horizontal and vertical deflection coils. A ferrite core comprising a juferrite core having a curved surface and an auxiliary ferrite core projectingly coupled to the left and right sides of the juferrite core to reduce the loss of the magnetic force, and the horizontal, vertical deflection coil and the ferrite In a deflection yoke for an RAC type CRT tube, which is installed to deflect an electron beam in a horizontal or vertical direction, the core being fixed to a predetermined position and having a holder for insulation between a horizontal deflection coil and a vertical deflection coil.

The ferrite core 100 of the ferrite core 110, the fixing guide 130 for fixing the secondary ferrite core 120 is made by mounting to the juferrite core (110).

8 is a perspective view of the fixing guide 130 according to an embodiment of the present invention, as shown, the fixing guide 130 is a fixing protrusion 131 for fixing the auxiliary ferrite core 120 and And a coupling part 132 to be fixed to the outer surface of the juferrite core 110.

In addition, as shown in FIG. 9, the auxiliary ferrite core 120 formed guide protrusions 121 on both sides of the fixing protrusions 131 of the fixing guide.

Looking at the coupling sequence of the ferrite core 100 according to the present invention with reference to the bar shown in Figure 6 to 9 as follows.

First, combine the juferrite core 110, then couple the two fixing guides 130 to the outer surface of the juferrite core 110 using the coupling portion 132 of the fixing guide, then fixing the fixing guide Place the projections 131 on the upper and lower sides (2, 5, 7, 10 o'clock) of the screen side, and insert the guide protrusions 121 of the auxiliary ferrite core 120 by inserting them into the fixing projections 131. .

In this case, an adhesive may be used in the coupling portion of the juferrite core 110 and the auxiliary ferrite core 120 to prevent the separation of the auxiliary ferrite core 120.

As described in detail above, the deflection yoke for the CRT to which the ferrite core for the A-C type deflection yoke according to the present invention is applied,

The workability is remarkably improved by providing a fixing guide for coupling the juferrite core and the auxiliary ferrite core, and the dispersion can be reduced during the coupling, thereby reducing the dispersion of the deflection yoke.

Claims (2)

Horizontal and vertical deflection coils for deflecting the electron beam emitted from the electron gun horizontally or vertically, and juferrite cores having a curved surface on the inner surface thereof to increase magnetic efficiency by reducing loss of magnetic force generated from the horizontal and vertical deflection coils. Ferrite core Ferrite core consisting of a secondary ferrite core protrudingly coupled to the left and right, and the horizontal, vertical deflection coil and the ferrite core fixed to a predetermined position and made of a holder for insulation between the horizontal deflection coil and the vertical deflection coil, In a deflection yoke for an RA (C) type CRT which is installed to deflect an electron beam in a horizontal or vertical direction, The auxiliary ferrite core of the ferrite core is formed by forming a guide protrusion corresponding to the fixing guide described later, A deflection yoke for a CRT tube, characterized in that the fixing guide for fixing the auxiliary ferrite core to the juferrite core is mounted on the juferrite core. The method of claim 1, The fixing guide is a fixing yoke for fixing the secondary ferrite core, and the yoke for the CRT, characterized in that the coupling portion for mounting fixed to the outer surface of the juferrite core.