KR100683645B1 - Color picture tube - Google Patents

Abstract

A color picture tube is disclosed. The disclosed color cathode ray tube includes a panel in which a screen for reproducing a predetermined image is formed on an outer surface thereof, and a fluorescent film having a predetermined pattern is formed on an inner surface thereof, a funnel in which an electron gun is enclosed with the panel and encapsulated in a neck portion, and a cone portion of the funnel. A color cathode ray tube provided with a deflection yoke, the housing comprising: a housing coupled to the deflection yoke by a predetermined coupling means provided at the deflection yoke and one end thereof and installed on one side of the neck portion; A convergence purity magnet assembly installed on an outer circumferential surface of the housing and provided with a plurality of magnet pieces adjusting the convergence of the center of the screen; And a beam rotation magnet installed on an outer circumferential surface of the housing between the convergence purity magnet assembly and the coupling unit to correct beam rotations on the left and right sides of the screen. According to the present invention, the productivity of the color cathode ray tube is increased as well as the quality is improved.

Description

Color cathode ray tube {Color picture tube}

1 is a configuration diagram schematically showing the configuration of a conventional color cathode ray tube.

Figure 2 is a schematic view showing the configuration of a conventional color cathode ray tube according to the present invention.

3 is a more detailed illustration of the housing magnet assembly of FIG.

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

110. Panel 111. Screen

112. Fluorescent film 120. Funnel

121. Neck part 122. Cone part

130. Electron gun 140. Deflection yoke

200. Housing Magnet Assembly

210.Housing 211.Protrusion

212.Step 213.Hook

220. Convergence Purity Magnet Assembly

230. Beam rotation magnet 240. Spacer

250. Clamp

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube, and more particularly, a color employing a convergence purity magnet assembly whose structure is simple to manufacture and improves quality stability. It relates to a cathode ray tube.

Generally, in an inline colored cathode ray tube with an electron gun, the axes of the three electron guns are arranged on the same plane including the axis of the water tube and the paths of the two outer electron beams are symmetrical with respect to the central electron beam path. Therefore, it is advantageous to construct the electron gun assembly of the color cathode ray tube which makes the electron beam radiated from each electron gun gather in the center of the fluorescent surface located in front of the electron gun assembly in the undeflected state by the deflection means, thereby producing a clean image.

However, due to an error occurring in manufacturing a part of the color cathode ray tube or a tolerance of the component size, the color cathode ray tube has a practical difficulty in satisfying the above ideal conditions.

For this reason, colored cathode ray tubes have a slight dispersion in their properties. Therefore, it is necessary to provide a suitable means for correcting the dispersion in the nature of such cathode ray tubes. As is well known, such properties can be adjusted by modifying the trajectory of the electron beam. The orbital correction of the electron beam can be adjusted by a magnetic field. A magnetic field for adjusting the trajectory of the electron beam has been used for color adjustment as well as for static convergence adjustment of the electron beam.

For example, the color purity can be defined by installing a two-pole magnet assembly including two overlapping ring-shaped two-pole permanent magnets on the outer circumferential surface of the neck portion of the color cathode ray tube to surround the traveling path of three electron beams. It is adjusted by rotating the permanent magnet relatively.

In addition, Static Convergence installs a quadrupole magnet assembly containing two overlapping four-pole ring-shaped permanent magnets and a six-pole magnet assembly including two six-pole ring-shaped permanent magnets on the neck of the color cathode ray tube. It can also be adjusted by enclosing the path of the electron beam. This arrangement is disclosed in US Patent Application No. 217,757, filed by Radio Corporation (U.S.).

By adjusting the intensity of the magnetic field generated by each magnet of the convergence purity magnet assembly, the electron beams emitted from each electron gun converge at the center of the fluorescent surface under unbiased conditions.

1 is a schematic diagram of a color cathode ray tube employing such a convergence purity magnet assembly.

Referring to the drawings, the color cathode ray tube includes a deflection yoke, in which a panel 10 and a funnel 20 are sealed and mounted to a cone 22 of the funnel 20 to deflect an electron beam emitted from an electron gun 30. 40 and a convergence consisting of two, four and six-pole magnets installed on the neck 21 of the funnel 20 and necessary for adjusting the convergence of the center of the screen 11 of the panel 10. Purity magnet assembly 50, and a beam rotation magnet 60 consisting of another four-pole magnet installed on one side of the deflection yoke and mounted to the deflection yoke 40 for beam rotation (beam rotation) correction is included Is done.

In the process for manufacturing the color cathode ray tube constructed as described above, the deflection yoke 40 is inserted into the cone portion 22 of the funnel 20, and the convergence purity magnet assembly 50 must be inserted and mounted. It must be done including the process. The deflection yoke 40 and the convergence purity magnet assembly 50 are manually assembled, and the convergence purity magnet assembly 50 and the beam rotation magnet 60 are separately assembled so that the cone The spacing between the vergence purity magnet assembly 50 and the beam rotation magnet 60 is not constant, resulting in an overall quality distribution of the color cathode ray tube due to these mounting position distributions. This acts as a factor that impairs the stability of the quality of the color cathode ray tube.

The present invention has been made to solve the above problems, and an object thereof is to provide a color cathode ray tube which can simplify assembly and achieve quality stability.

Color cathode ray tube of the present invention for achieving the above object, the screen is formed on the outer surface to reproduce a predetermined image, the inner surface is formed with a fluorescent film of a predetermined pattern, and the panel is sealed to the panel and the electron gun in the neck portion A color cathode ray tube having a sealed funnel and a deflection yoke installed at a cone portion of the funnel, wherein the deflection yoke is coupled to the deflection yoke by a predetermined coupling means provided at one end thereof and the neck. A housing installed at one side of the unit; A convergence purity magnet assembly installed on an outer circumferential surface of the housing and provided with a plurality of magnet pieces adjusting the convergence of the center of the screen; And a beam rotation magnet installed on an outer circumferential surface of the housing between the convergence purity magnet assembly and the coupling unit to correct beam rotations on the left and right sides of the screen.

In the present invention, it is further provided with a spacer which is provided on the other end of the housing to support the convergence purity magnet assembly to the housing.

In the present invention, the coupling means, and at least one hook extending from the housing toward the deflection yoke; It includes an inlet groove formed to be coupled to the hook on one side of the deflection yoke.

In the present invention, the housing, the stepped portion is formed in the diameter of the outer peripheral surface of the housing is small for the installation of the convergence purity magnet assembly, and the plurality of alternately on the outer peripheral surface of the housing for the beam rotation magnet is installed Dog projections are provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing the configuration of a color cathode ray tube according to the present invention.

Referring to the drawings, the color cathode ray tube according to the present invention is a transparent window of a panel 110 having a screen 111 for reproducing an image upon regeneration of a screen, and a predetermined pattern formed on an inner surface of the screen 111. A fluorescent film 112, a shadow mask frame assembly (not shown) installed inside the panel 110, and the panel 110 are sealed to form an envelope of a color cathode ray tube, and to the neck portion 121. And a deflection yoke 140 installed in the cone portion 122 of the funnel 120, in which the electron gun 130 is enclosed.

In the fluorescent film 112 for forming a predetermined image on the inner surface of the panel 110, phosphors are formed in a predetermined pattern. Electrons scattered from the periphery of the panel 110 are scanned by the fluorescent film 112 and The phosphor is excited.

At the rear of the deflection yoke 140, a housing 210 coupled to the deflection yoke 140 by a predetermined coupling means formed at the deflection yoke 140 and one end thereof is installed at the neck portion 121. The outer peripheral surface of the housing 210 is provided with a convergence purity magnet assembly 220 provided with a plurality of magnet pieces for adjusting the convergence of the center of the screen 111 of the panel 110. It is installed on the outer circumferential surface of the housing 210 between the version purity purity magnet assembly 220 and the coupling means, that is, at the central portion of the housing 210 to perform beam rotation on the left and right of the screen 111 of the panel 110. A beam rotation magnet 230 for calibrating is installed.

A spacer 240 is installed at the other end of the housing 210 to allow the convergence purity magnet assembly 220 to be supported by the housing 210. In addition, the clamp 250 is installed in the neck portion 121 to face the spacer 240 so that the housing 210 does not depart from the installation position on the neck portion 121.

Coupling means installed on one end of the housing 210 and the deflection yoke 140, the hook 213 extending from the housing 210 toward the deflection yoke 140 at least one, and the hook ( 213 is formed with an inlet groove 141 provided on the inner surface of the deflection yoke 140. At least two hooks 213 may be installed to be stably supported by the deflection yoke 140.

In addition, the housing 210 is provided with a stepped portion 212 formed by reducing the diameter of the outer circumferential surface of the housing 210 so that the convergence purity magnet assembly 220 is installed, and the beam rotation magnet 230 is provided. In order to be installed, a plurality of protrusions 211 formed alternately on the outer circumferential surface of the housing 210 is provided. Since the step portion 212 and the projections 211 are formed by the plastic injection molding of the housing 210, it can be easily molded in the housing 210.

The convergence purity magnet assembly 220 is a pair having two poles, four poles, and six poles for adjusting the convergence of the center of the screen 111 and the landing of the electron beam emitted from the electron gun 130. ), And the beam rotation magnet 230 is formed of a four-pole magnet piece to correct beam rotation on the left and right of the screen 111 of the panel 110.

The operation of the color cathode ray tube according to the present invention configured as described above will be described. In the following, description of the operation of the general color cathode ray tube will be omitted, and only the operation according to the features of the present invention will be described.

3 illustrates a housing magnet assembly 200 in which a housing 210 installed in the neck portion 121, a convergence purity magnet assembly 220, and a beam rotation magnet 230 installed in the housing 210 are integrated. Is shown in more detail. As shown, the beam rotation magnet 230 is assembled between the protrusions 211 of the housing 210, and the convergence purity magnet assembly 220 is attached to the stepped portion 212 of the housing 210. Assemble The spacer 240 is inserted into the rear of the convergence purity magnet assembly 220 to face the convergence purity magnet assembly 220.

In this way, the beam rotation magnet 230, the convergence purity magnet assembly 220, and the spacer 240 are integrated into one housing 210 to be one housing magnet assembly 200. The hook 213 formed at the front end of the housing 210 of the housing magnet assembly 200 is inserted forward into the neck portion 121 of the funnel 120. Subsequently, a plurality of hooks 213 formed at one end of the housing 210 are inserted into the inlet groove 141 of the deflection yoke 140. In other words, when the housing magnet assembly 200 is pressed toward the deflection yoke 140 by a one touch method, the hook 213 is naturally coupled to the inlet groove 141 of the deflection yoke 140.

As described above, as shown in FIG. 1, as shown in FIG. 1, the convergence purity magnet assembly 50 and the beam rotation magnet 60 are not separately installed in the neck portion 22, but the housing 210 is provided. In addition to combining them at a predetermined position in the assembling to the neck portion 121 integrally at a time.

Therefore, the convergence purity magnet assembly 220 and the beam rotation magnet 230 are coupled to the housing 210, that is, they can be assembled together with the deflection yoke 140 so as to assemble the color cathode ray tube assembly. Eliminating the process of mounting the convergence purity magnet assembly 220 and the beam rotation magnet 230 structure to the neck portion 121 of the funnel 120 in the line. In addition, the distance between the convergence purity magnet assembly 220 and the beam rotation magnet 230 is always kept constant, and horizontal and vertical shift (H, V shift) correction devices are integrally attached to the color cathode ray. The overall quality of the tube is improved, and the structures of the convergence purity magnet assembly 220 and the beam rotation magnet 230 are assembled to the deflection yoke 140 in a one-touch manner, which is the deflection yoke 140 assembly. Work efficiency will be achieved.

As described above, the color cathode ray tube according to the present invention has the following effects.

The assembly of the housing magnet assembly in which the purity magnet assembly and the beam rotation magnet structure are installed on the outer circumferential surface of one housing is combined with the coupling means formed in the housing and the deflection yoke. This simplifies the assembly process, increases the productivity of the color cathode ray tube, and lowers the cost of the product.

In addition, since the purity magnet assembly and the beam rotation magnet are always maintained at regular intervals, quality distribution of color cathode ray tubes which may be caused when they are assembled can be suppressed.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (5)

A panel is formed on the outer surface to reproduce a predetermined image and a fluorescent film of a predetermined pattern is formed on the inner surface, a funnel sealed to the panel and encapsulated with an electron gun in the neck portion, and a deflection yoke installed in the cone portion of the funnel. In the equipped color cathode ray tube, A housing coupled to the deflection yoke by a predetermined coupling means provided at the deflection yoke and one end thereof and installed at one side of the neck portion; A convergence purity magnet assembly installed on an outer circumferential surface of the housing and provided with a plurality of magnet pieces adjusting the convergence of the center of the screen; And a beam rotation magnet installed on an outer circumferential surface of the housing between the convergence purity magnet assembly and the coupling means to correct beam rotation on the left and right sides of the screen. The method of claim 1, And a spacer installed at the other end of the housing to allow the convergence purity magnet assembly to be supported by the housing. The method of claim 1, wherein the coupling means, At least one hook extending from the housing toward the deflection yoke; Collar cathode ray tube, characterized in that it comprises an inlet groove formed to be coupled to the hook on one side of the deflection yoke. The method of claim 1, The housing is a color cathode ray tube, characterized in that provided with a stepped portion formed with a smaller diameter of the outer peripheral surface of the housing in order to install the convergence purity magnet assembly. The method of claim 1, The housing has a color cathode ray tube, characterized in that provided with a plurality of projections alternately formed on the outer peripheral surface of the housing in order to install the beam rotation magnet.

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