KR20020018424A - Compensation plate for vertical center raster of deflection yoke - Google Patents

Abstract

PURPOSE: A vertical center raster correction piece of a deflection yoke is provided to effectively correct vertical center raster phenomena and improve screen characteristic by forming pin cushion magnetic field. CONSTITUTION: A deflection yoke(100) comprises a separator(111) having a neck part(112) and a flange(113), a horizontal deflection coil inside the separator, and a ferrite core(115) having a wound vertical deflection coil(114) and assembled outside the separator(111) with a core clamp(116). The deflection yoke(100) also includes vertical center raster correction pieces(120,121) arranged at the right and the left on the outside of the neck(117) as wrapping the neck(117). The vertical center raster correction pieces(120,121) outside of the neck(117) induce pin cushion magnetic field around the neck(117) so as to increase deflection power of a G beam more than an R beam and a B beam.

Description

Compensation plate for vertical center raster of deflection yoke}

The present invention relates to a vertical center raster correction piece of a deflection yoke, and more particularly, in an electron gun arranged in a cathode ray tube (CRT) of a model 25 ″ or less, the shield attached to the inside of the convergence cup of the electron gun ( In order to improve the characteristics of the screen by correcting the vertical center raster in the deflection yoke, the internal magnetic material called shunt and enhancer is removed and used for the purpose of reducing production cost. It relates to a vertical center raster correction of a deflection yoke.

Generally, as shown in FIG. 1, a horizontal deflection coil (not shown) is mounted inside the separator 11 including the neck portion 12 and the flange portion 13, and a vertical deflection coil on the outside. (14) is wound around the ferrite core 15 is assembled by the core clamp (16), R as the sawtooth pulse applied to the horizontal deflection coil and the vertical deflection coil (14) to form a magnetic field R emitted from the electron gun Scanning the red, G (Green) and B (Blue) electron beam determines the dice on the screen.

At this time, the vertical center raster of the deflection yoke, which is a kind of misconvergence phenomenon, has a vertical center raster narrow and an electron beam upper and lower sides having the same amount of gap between the R beam and the G beam and the B beam scanned on the upper and lower sides of the screen. There is an unbalance of the vertical center raster that is not equal to the vertical center raster.

2 is a screen state diagram illustrating a vertical center raster phenomenon occurring on a screen of a deflection yoke according to the prior art.

As shown in FIG. 2, the deflection yoke 10 according to the related art in which the internal magnetic material attached to the electron gun is removed has a lower sensitivity than the R beam and the B beam located at both sides of the G beam. This results in a vertical center raster phenomenon in which the G-beams that are deflected on the outside of the R and B beams are scanned up and down on the screen.

Therefore, to prevent this, the factor of the cathode ray tube is modified to increase the sensitivity of the G-beam, but the manufacturing management of the cathode ray tube becomes difficult to handle, and if the vertical center raster phenomenon is left as it is, the product design is mass produced to the maximum. There is a problem that the development of a correction device for more efficient correction is required.

Accordingly, the present invention has been proposed in order to solve the problems of the prior art, and its object is to install a vertical center raster correction piece on the left and right sides of the neck formed on the neck portion of the separator, and the pincushion ( By forming a magnetic field and scanning the electron beam emitted from the electron gun to be exactly matched on the screen, it is possible to efficiently correct the vertical center raster phenomenon generated on the screen to improve the screen characteristics.

1 is a schematic front view showing a general deflection yoke.

2 is a screen state diagram illustrating a vertical center raster phenomenon occurring on a screen of a deflection yoke according to the prior art.

3 is a schematic front view showing a deflection yoke according to the present invention;

4 is a view showing the operation of the vertical center raster correction piece of the deflection yoke according to the present invention.

Explanation of symbols on the main parts of the drawings

100; Deflection yoke 111; Separator

112; Neck 113; Flange

114; Vertical deflection coil 115; Ferrite core

116; Core clamp 117; Neck

120, 121; Vertical Center Raster Correction

In order to achieve the above object, the present invention is a horizontal deflection coil is mounted on the inner side of the separator consisting of a neck portion and a flange formed with a neck on the upper surface and the ferrite core wound around the vertical deflection coil is assembled by the core clamp In the deflection yoke, the technical features include a vertical center raster correction piece provided so as to surround the outer periphery of the neck on the left and right sides of the neck formed on the neck portion of the separator.

Referring to the preferred embodiment of the present invention configured as described above in detail with reference to the drawings as follows.

Figure 3 is a schematic front view of the deflection yoke according to the present invention, Figure 4 is a view showing the operating state of the vertical center raster correction piece of the deflection yoke according to the present invention.

3 and 4, the deflection yoke 100 according to the present invention has a horizontal deflection inside the separator 111 including a neck 112 and a flange 113 having a neck 117 formed on an upper surface thereof. The ferrite core 115, on which the coil (not shown) is mounted and the vertical deflection coil 114 is wound on the outside, is assembled by the core clamp 116.

In addition, the vertical center raster correction pieces 120 and 121 are installed to the outside of the neck 117 formed on the neck 112 so as to surround the outer circumference of the neck 117 so as to form a pincushion magnetic field.

Therefore, the deflection yoke 100 according to the present invention forms a pincushion magnetic field around the neck 117 by the vertical center raster correction pieces 120 and 121 installed outside the neck 117 to deflect the R beam and the B beam. By increasing the deflection force F2 of the G beam than F1, the phenomenon that the G beam is sag is effectively corrected.

As described above, according to the vertical center raster correction piece of the deflection yoke according to the present invention, the correction piece is installed on the left and right sides of the neck outside the neck of the deflection yoke to form a pincushion magnetic field around the neck to form a G-beam. Increases the deflection force of, effectively corrects the vertical center raster phenomenon that occurs on the screen has an excellent effect in improving the characteristics of the screen.

Claims (1)

Ferrite core 115 having a horizontal deflection coil mounted on the inner side of the separator 111 formed of the neck portion 112 and the flange portion 113 having the neck 117 formed on the upper surface thereof, and wound on the outer side of the vertical deflection coil 114. In the deflection yoke 100, which is assembled by the core clamp 116, Deflection characterized in that it comprises a vertical center raster correction piece (120, 121) installed to surround the outer periphery of the neck 117 on the left and right of the neck 117 outer side formed on the neck portion 112 of the separator 111 Vertical center raster revision of York.