KR200200878Y1 - Fixed Structure of Electron Gun Electrode for Cathode Ray Tube - Google Patents

Abstract

Bead glass provided to make the arrangement of the electron gun electrode for cathode ray tube constant, and a plurality of electrodes for beaming hot electrons to form a constant beam spot so that the electrode can maintain a more firm buried strength In the electron gun of the cathode ray tube,

The electrode 20 provides a fixing structure of an electron gun electrode for a cathode ray tube in which an arc portion 24 is formed in a flange portion 22.

Description

Fixed Structure of Electron Gun Electrode for Cathode Ray Tube

1 is a view showing an example of an electron gun electrode according to the present invention.

Figure 2 is a side cross-sectional view of the main part of the electrode according to the present invention.

3 is a side cross-sectional view of a neck portion of a cathode ray tube.

4 is a view showing a state where a conventional electrode is embedded in bead glass.

* Explanation of symbols for main parts of the drawings

20 electrode 22 flange part

24: groove

[Industrial use]

The present invention relates to a fixing structure of an electron gun electrode for a cathode ray tube, and more particularly, to a fixing structure of an electrode to ensure the fixing of the electron gun electrode.

[Private Technology]

The cathode ray tube deflects the electron beam emitted from the electron gun up, down, left, and right to draw the raster on the screen.In this case, the shadow mask which causes the deflected electron beam to be landed on the corresponding phosphor is placed facing the inner surface of the panel. Suspension is supported.

The electron gun focuses and radiates hot electrons generated by heating a hot electron emitting material, focuses and diverges the electron beams, focuses them, accelerates the focused electron beams, and lands on the phosphor.

Most in-line electron guns consist of a plurality of rows of perforated electrodes through which the electron beam can pass about the same axis as the three cathodes arranged in the horizontal direction.

In general, the first electrode, the second electrode, the third electrode, and the fourth electrode are expressed from the cathode, and the third electrode functions to focus the electron beam, and the fourth electrode is applied with a voltage to accelerate the action. do.

In order to improve the performance of the electron gun, the problem of the improvement of the arrangement | positioning of each electrode, the voltage applied to these electrodes, the multistage focusing of an electron beam, the spot diameter of an electron beam, etc. has been conventionally made.

In recent years, attempts have been made to large-size apertures punched through the electrodes of electron guns. However, the spot diameter of the electron beam is made to a desired level. Since the distance to be made affects the manufacturing of the electrode, it is known that further large diameter is limited.

3 is a side cross-sectional view of a neck portion of a general cathode ray tube, and includes a first electrode 4, a second electrode 6, a third electrode 8, and a fourth electrode 10 coaxial with the three cathodes 2. ) Are sequentially arranged.

These electrodes 4, 6, 8, and 10 are arranged at regular intervals with flanges embedded in the bead glasses 12 and 14, respectively.

[Problems to Be Solved by the Invention]

However, each of the electrodes described above has a planar portion 16 embedded in the bead glass 12, 14, as shown in FIG. 4, and the buried portion is pushed in to substantially increase the depth of the buried portion of the flange. This lowers the reliability of the landfill.

The reason why the buried portion is pushed in is to press the bead glass against the flanges of the fixed electrodes when the temperature is reached while heating the bead glass with a torch while temporarily fixing each of the sequentially arranged electrodes. This is because landfilling is done in a manner.

Therefore, the phenomenon in which the buried portion of the bead glasser is pushed in is not considered unless the fixing method is changed. In this case, the buried depth of the flange portion has insufficient strength to sufficiently support the electrode.

In particular, in the case where the portion to be embedded is planar, since the material of the electrode and the bead glass material have different welding strengths, these parts cannot be fused to each other, so that the electrode may be separated from the bead glass.

[Means to solve the problem]

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a fixed structure of the electron gun electrode for the cathode ray tube that each electrode can be firmly supported on the bead glass.

In order to realize the object of the present invention as described above, in the electron gun of the cathode ray tube formed with a plurality of electrodes to beam the hot electrons to form a constant beam foot, the electrode is provided with a groove in the flange portion A fixed structure of an electron gun electrode for a cathode ray tube is provided.

The groove portion provides a fixing structure of the electron gun electrode for the cathode ray tube, characterized in that at least two or more.

EXAMPLE

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

FIG. 1 shows a third electrode among the electrodes of the inline electron gun. In the present embodiment, the first electrode, the second electrode, the fourth electrode and the like can also be applied.

The flange portion 22 of the electrode 20 is provided with a groove portion 24, and at least two groove portions may be provided.

As shown in FIG. 2, the groove portion 24 may be a shape in which the bead glass B can be fused and positioned with the groove portion 24 formed in the flange portion 22.

Such a shape may be a circular flaw or a polygonal groove, on the other hand, may form a protrusion.

According to the electrode fixing structure of the present invention, the buried glass B is heated in the usual manner in a state where the electrodes are temporarily fixed and pressurized by the flange of the electrode so that the buried portion of the flange is positioned in the bead glass. do.

In this way, since the flange of the electrode is simply made in a plane, there is a fear that the buried portion is separated, the present invention is formed because the groove is formed in the bead glass to be seated in this portion to function as a conventional electrode Compared to the fixing structure, the fixing force can be further strengthened.

This can prevent the change of the fixed position of the electrode, so that the imposing effect of reducing the amount of miss convergence can be obtained during the emission and focusing of the electron beam.

Claims (2)

In the electron gun of the cathode ray tube comprising a plurality of electrodes to beam the hot electrons to form a constant beam spot, The electrode 20 is a fixing structure of the electron gun electrode for the cathode ray tube formed with a groove portion 24 in the flange portion (22). The fixed structure of the electron gun electrode for a sound tube according to claim 1, wherein at least two grooves (24) are provided.