KR20030071121A - Deflection York for C-CRT - Google Patents

Abstract

PURPOSE: A deflection yoke for a color CRT(Cathode Ray Tube) is provided to be capable of easily carrying out the fine adjustment of longitudinal and lateral line mis-convergence and easily controlling longitudinal distortion phenomenon by using a plurality of vertical deflection sub-coils. CONSTITUTION: A CRT comprises a panel including a fluorescent substance layer, a shadow mask fixed to a support frame of the panel for discriminating colors, a funnel having a thin neck part as one piece, melted and fixed to the panel, an electron gun included in the neck part for emitting electron beam to the fluorescent substance layer, and a deflection yoke(7) having a vertical and horizontal deflection coil(9) for vertically or horizontally deflecting the electron beam emitted from the electron gun, installed at a cone part of the funnel. At this time, at least one vertical deflection sub-coil(29) is installed in a window part(23).

Description

Deflection yoke for color cathode ray tubes {Deflection York for C-CRT}

The present invention relates to a deflection yoke of a cathode ray tube that deflects an electron beam radiated from an electron gun over an entire area of a screen, and more particularly, to provide a high-performance deflection yoke structure that facilitates fine adjustment of misconvergence. will be.

In general, the cathode ray tube is fixed to a panel 1 in which a phosphor layer 2 is formed on an inner surface of the cathode ray tube and a support frame fixed to an inner surface of the panel so as to be maintained at a predetermined distance from the phosphor layer. A shadow mask (3) which serves as a color discrimination function of the funnel (4), which is fused and fixed by the panel and the frit glass, and has a thin neck portion (4a) integrally formed at the rear, and An electron gun 5 accommodated in the neck portion to radiate the electron beam 6 to the phosphor layer, and a deflection yoke 7 installed in the cone portion of the funnel to deflect the electron beam emitted from the electron gun in a vertical or horizontal direction. have.

Therefore, when power is applied to the electron gun 5 enclosed in the neck portion 4a and the electron beam is scanned into the phosphor layer, the scanned electron beam is deflected in the vertical or horizontal direction by the deflection yoke 7 to the shadow mask 3. Since the phosphor emits light through the formed hole, a predetermined image is reproduced.

The deflection yoke 7 serving as described above has a horizontal deflection coil 8 which deflects the electron beam 6 emitted from the electron gun 5 in the horizontal direction, and an electron beam emitted from the electron gun 5 in the vertical direction. A vertical deflection coil 9 for deflecting, a conical ferrite core 10 for improving magnetic efficiency by reducing a loss of magnetic force generated in the vertical and horizontal deflection coils 8 and 9, and the vertical and horizontal deflection coils (8) (9) and the ferrite core 10 is fixed to a predetermined position and consists of a holder 11 and the like to insulate between the vertical and horizontal deflection coils.

Since the conventional deflection yoke 7 has a circular cross-section of the funnel cone portion 4b of the cathode ray tube, the vertical and horizontal deflection coils 8 and 9 of the deflection coil are also circular. Shows a vertical deflection coil 9 and a window 23 which refers to the empty space in the central part of the coil.

The deflection yoke 7 configured as described above adjusts the thickness of the window 13 of the coil or partially changes the coil shape by changing a gap between the inner and outer surfaces of the winding to correct misconvergence of the upper and lower axes and the corner horizontal lines on the screen. It is fixing misconvergence.

However, in this method, when the misconvergence is adjusted, the influence on the convergence other than the misconvergence to be corrected is repeated, and accordingly, the vicious cycle of re-correcting the affected convergence is repeated.

That is, in the prior art, two vertical coil winding widths are adjusted to correct upper and lower axis and corner transverse misconvergence, or the local coil is welded locally to adjust the misconvergence. .

In addition, since the conventional vertical deflection coil is configured such that the size of the shape cannot be changed, it is possible to correct misconvergence only by changing the number of turns of the vertical deflection coil.

However, when the number of turns of the vertical deflection coils is changed, it is difficult to finely adjust the misconvergence because the degree of influence on other convergences becomes stronger.

FIG. 2 is a view illustrating a pattern of vertical and horizontal horizontal lines and blue patterns of vertical and vertical vertical lines when viewed from the screen side of the screen, in which B is blue, and G is green. , R is red.

3 is a diagram illustrating the convergence of vertical vertical lines on the screen and the misconvergence of corner horizontal lines.

In the conventional vertical deflection coil 9 shown in Fig. 4, the method of adjusting the misconvergence in Fig. 2 widens the gap between the inner shape and the outer shape of the winding and thickens the thickness of the window 13 of the vertical deflection coil. In this case, as shown in FIG. 3, the blue shift of the vertical axis is eliminated, but misconvergence of red and blue of the corner portion is generated.

In addition, in this case, as shown in FIG. 5, distortion of the vertical horizontal line may appear.

The present invention has been proposed to solve the above problems in the prior art, and facilitates fine adjustment of vertical and vertical axis vertical and corner horizontal misconvergence, easily adjusts up and down distortion phenomenon, and has high dispersion with low external characteristics. The purpose is to implement a deflection yoke.

1 is a cross-sectional view of a typical color cathode ray tube.

FIG. 2 is a schematic diagram showing a pattern in which vertical vertical lines on the screen are separated from blue in red and green standards. FIG.

3 is a schematic diagram showing misconvergence of upper and lower corners on a screen.

4 is a front view of a vertical deflection coil used in a conventional deflection yoke.

FIG. 5 is a schematic diagram illustrating an up and down distortion phenomenon occurring when misconvergence adjustment is performed from FIG. 2 to FIG. 3.

Figure 6 is a front view of the deflection yoke is installed a vertical deflection auxiliary coil according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1 panel 3 shadow mask

4: funnel 5: electron gun

6 electron beam 7: deflection yoke

8: horizontal deflection coil 9: vertical deflection coil

23 window 29: vertical deflection auxiliary coil

The object is a panel having a phosphor layer formed on the inner surface, a shadow mask fixed to a support frame fixed to the inner surface of the panel and acting as a color screening of the electron beam, and a thin neck portion fused and fixed to the panel integrally. A formed funnel, an electron gun accommodated in the neck portion to emit an electron beam toward the phosphor side, and a vertical deflection coil and a horizontal deflection coil installed in the cone portion of the funnel to deflect the electron beam emitted from the electron gun in a vertical or horizontal direction. In the cathode ray tube composed of a deflection yoke, the deflection yoke can be achieved through a deflection yoke for a color cathode ray tube, characterized in that at least one vertical deflection auxiliary coil is provided in the tenon of the vertical deflection coil.

Hereinafter, a specific embodiment of the present invention will be described.

As shown in FIG. 6, the deflection coil according to the present embodiment has a vertical deflection auxiliary coil 29 having different sizes in the window 23 of the vertical deflection coil 9 of the deflection yoke 7.

Since the vertical deflection auxiliary coil 29 installed in this way is disposed in the window 23 of the vertical deflection coil 9 and is located at a position away from the vertical axial direction, the trajectory of the electron beam is moved not only in the vertical axis direction but also in the horizontal direction from the angle. Deflections and influence on the vertical line will be less.

In addition, the coil area also has a much smaller vertical deflection auxiliary coil (29) than the vertical deflection coil (9), so the influence on the magnetic field is reduced, and thus the size of the vertical deflection auxiliary coil (29) is changed. Therefore, it can be seen that fine adjustment of miss convergence is possible.

That is, when the deflection yoke 7 is formed by forming a plurality of (large, medium and small) vertical deflection auxiliary coils 29 having different sizes, the vertical deflection auxiliary coil 29 when the miss convergence pattern of FIG. 2 occurs. If the coil is a medium-sized specification, it is possible to improve the miss convergence and distortion phenomenon by changing only the large part and changing the part.

In addition, when molded into a small vertical deflection auxiliary coil (29) is changed to a medium coil, and if the correction is still insufficient, it may be changed to a large coil.

In addition, in the case where the misconvergence is a pattern in which the red of the vertical axis on the upper and lower axial lines is separated from the above, the reverse correction, that is, the vertical deflection auxiliary coil 29 is gradually reduced, so that the misconvergence of the desired portion can be adjusted.

In addition, in another embodiment of the present invention, by installing a single auxiliary coil of variable size without easily installing a plurality of auxiliary coils 29 as in the above embodiment, the fineness of misconvergence is simpler and faster. It can be seen that adjustments can be made.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the installation form of the vertical deflection auxiliary coil of the present invention may be variously modified and implemented by those skilled in the art.

However, such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments shall fall within the appended claims of the present invention.

The present invention as described above, by installing a plurality of the size of the vertical deflection auxiliary coil in a variable or various sizes, it is easy to fine-tune the upper and lower corner horizontal line and vertical axis misconvergence, it is possible to improve the distortion phenomenon, Therefore, it is a useful invention that can realize a high-performance deflection yoke with little dispersion in the outer part.

Claims (3)

A panel having a phosphor layer formed on an inner surface thereof, a shadow mask fixed on a support frame fixed on an inner surface of the panel to serve as color selection of an electron beam, and a funnel formed by integrally forming a neck portion fused and fixed to the panel; A deflection yoke including an electron gun which is accommodated in the neck portion and radiates an electron beam toward the phosphor side, and a vertical deflection coil and a horizontal deflection coil which are installed in the cone portion of the funnel to deflect the electron beam emitted from the electron gun in a vertical or horizontal direction. In the configured cathode ray tube, The deflection yoke has a deflection yoke for a color cathode ray tube, characterized in that at least one vertical deflection auxiliary coil is provided in the window portion of the vertical deflection coil. The method of claim 1, The vertical deflection auxiliary coil deflection yoke for the color cathode ray tube, characterized in that the variable size is provided. The method of claim 1, The vertical deflection auxiliary coil is provided with a plurality, deflection yoke for the color cathode ray tube, characterized in that the size is provided differently.