KR950010646Y1 - Stray emission removing device for electron gun - Google Patents

Abstract

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Description

Stray Emission Repair Equipment

1A, B, C, and D are circuit diagrams showing voltage applied wirings and circuits of a conventional stray emission repair apparatus, respectively.

Figure 2 is a schematic plan view showing the inter-grid connection state and use state of the stray emission repair apparatus of the present invention.

3 is a circuit diagram showing a circuit of the stray emission repair apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

7: repairing rod 9: bead dress

g1: first grid g2: second grid

g3: third grid g4: fourth grid

g5: fifth grid g6: sixth grid

The present invention relates to a stray emission repair apparatus, and more particularly, a stray emission repair apparatus for removing impurities between grid electrodes after sealing of the electron gun.

In the manufacturing process of a CRT, an electron gun is enclosed inside a funnel neck, vacuumed, and then arced due to impurities attached between the threads, such as the generation of an arc due to impurities attached between the grids of the electron gun. In order to eliminate the stray emission phenomenon such as the occurrence of a high voltage by applying a high voltage it is removed.

A conventional stray emission repair apparatus for this purpose is shown in Figures 1a, b, c, d.

1a and c are used for repairing between the fifth grid (g1) and the sixth grid (g6) (anowood), and b and d are between the second grid (g2) and the third grid (g3), and the third grid ( The wirings for processing between g3) and the fourth grid g4 and between the fourth grid g4 and the fifth grid g5 are respectively shown.

A circuit such as c and d is protected by a spark gap to apply a high voltage to discharge and remove adhesion impurities between grids.

The conventional stray emission repair apparatus described above cannot remove impurities of bead glass and / or neck glass, and is likely to cause cracks in the neck glass due to rapid grid-to-grid discharge. Had problems such as.

The present invention was devised to solve such a conventional problem, and it is designed to repair the stray emission by configuring a common ground and sliding it as a repair rod outside the neckgrass to induce sequential discharge without relying on each individual connection as in the prior art. The purpose.

In order to achieve this object, the stray emission repair apparatus according to the present invention is characterized by having a repair rod for performing repair outside of the neckgrass and a connection accordingly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same member as the prior art uses the same member number.

FIG. 2 is a plan view illustrating the stray emission repair apparatus of the present invention, and includes a fifth grid g5, a fourth grid g4, a third grid g3, a second grid g2, and a first grid g1. The interconnection is maintained in a mutually connected relationship, and is connected to the 0V terminal line of the circuit, and the sixth grid g6 is connected to the high voltage line of the circuit, for example, 60KV line.

The repair rod 7 connected from the ground wire is composed of a conductive contact 7 '' such as a carbon rod, a metal, and the like on the handle 7 'made of a non-conductive material.

The spark gap 8 is a symmetrical spark generator that maintains a constant gap to protect the circuit when an overvoltage is applied. In the drawing, 9 is beadgrass and 10 is neckgrass.

The use of the stray emission repair apparatus of the present invention as described above will be described.

When the rod 7 connected to the ground wire is gradually moved to one side while being closely attached to the negra 10, between the grids g1, g2, g3, g4, g5, g6, the grids g1, g2, g3, g4, A discharge is caused between g5, g6) and the neckgrass 10 and the beadgrass 9.

This discharge spark cauterizes impurities adhering between the grids g1, g2, g3, g4, g5 and g6 and between the beadgrass 9 and the neckgrass 10 to eliminate the cause of stray emission.

As described above, the stray emission repair apparatus of the present invention greatly shortens the complicated wiring as in the conventional stray emission repair apparatus and discharges them sequentially outside the neck glass, as well as impurities between the grid and the neck glass. It can be removed until the effect.

Claims (3)

In the stray emission repair apparatus, the wiring between each grid electrode of the electron gun is configured as a common ground without individual connection, and a repair rod is installed outside the neck glass to cause sequential discharge to repair the stray emission. Stray Emission Repair. The method of claim 1, wherein the first, second, and third grids (g1, g2, g3) of the electron gun are connected to 0V of the high voltage generation circuit, and the fourth, fifth, and sixth grids (g4, g5, g6) are connected to each other. Wiring is alternately arranged and connected to the high voltage applying terminal of the high voltage generating circuit. The repair rod 7 having the intermediate output line of the high voltage applying circuit and the conductive contact 7 'outside the neckgrass 10 is grounded and connected. Stray emission repair device characterized in that. The stray emission repair apparatus according to claim 2, wherein the high voltage application circuit includes an intermediate output terminal between 0V and a high output terminal.