JPH09204881A - Electron gun body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the projection of a component from an insulating support and make the attachment of the component to a neck tube easy by forming a recessed part in one portion of the insulating support and arranging the component for dividing and supplying voltage in an electron gun body structure constituted by forming plural electrodes in a pair of insulating supports. SOLUTION: A recessed part 7a is formed in a clamp shape in a part of an insulating support, a voltage dividing resistance body 7b for dividing voltage and supplying divided voltage to an anode is housed in the recessed part 7a, and the projection of the resistance body 7b from an insulating support 7 is suppressed even if the resistance body 7b is a fixed resistance. A gap between an electron gun body structure 1 and a neck tube 10 is ensured without enlarging the caliber of the neck tube 10, the attachment of the electron gun body structure 1 with the built-in resistance body 7b to the neck tube 10 is made easy, the breakage of the electron gun body structure 1 is reduced, and deterioration in voltage resistant characteristics of the resistance body 7b can be prevented. The caliber of the neck tube 10 is maintained, and the deflection efficiency of a deflection yoke is ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron gun assembly such as a cathode ray tube, and more particularly to an electron gun assembly capable of easily disposing a circuit component such as a resistor on an insulating support.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view of a main part of a conventional electron gun assembly such as a cathode ray tube. As shown in FIG. 5, the electron gun assembly 1
1 is composed of a cathode (not shown) that emits electrons and a cylindrical electrode such as a G1 electrode 12, a G2 electrode 13, a G3 electrode 14, a G4 electrode 15, and a G5 electrode 16 that controls, accelerates, and converges an electron beam. These electrodes are stacked with high precision by an assembly jig and then melted
It is formed by implanting the ends of the electrodes 12 to 16 on a pair of insulating supports 17 called glass.

Generally, in a color cathode ray tube having an electron gun assembly 11 for generating a multi-electron beam, each electron beam passes through a separate main electron lens and is then focused on a target. This main electron lens is generally formed by an electrostatic field, and the electron beam is converged while passing through this electrostatic field, so that a predetermined voltage is applied to the plurality of electrodes 12 to 16 forming the electron gun assembly 11. It is realized by applying. As means for applying a predetermined voltage to these electrodes by dividing resistance of the anode voltage, for example, JP-A-55-
Japanese Patent No. 159549 discloses a method of applying a voltage to a plurality of electrodes by forming a support structure with a resistor and an insulating support.

[0004]

However, in the electron gun assembly 11 as described above, the gap A between the electron gun assembly 11 and the inner wall of the neck tube 20 is small, and a resistor is further incorporated therein, This gap A becomes even smaller, and when the electron gun assembly 11 is mounted in the neck tube 20, it becomes difficult to insert it and the electron gun assembly 11 is damaged if it is forcibly inserted, and this gap is small. Therefore, the withstand voltage characteristics of the neck tube 20 and the resistor are deteriorated, and a leak current flows between the electrodes via the inner wall of the neck tube 20. As one of the means for solving this problem, in the method of enlarging the neck tube 20 in order to maintain the gap A between the inner wall of the neck tube 20 and to secure the space between the resistor and the neck tube 20, there is a Deflection yoke needed,
Deflection efficiency is lowered, and the convergence characteristics are deteriorated by the method of making the electron gun structure 11 small, and it is very difficult to practically use these methods. Therefore, the present invention has been proposed in view of the above problems, and an object thereof is to provide means for incorporating a resistor while maintaining a gap between the electron gun structure and the inner wall of the neck tube. An object of the present invention is to provide an electron gun assembly that can be easily mounted in the neck tube without damaging the electron gun assembly.

[0005]

The present invention is an electron gun assembly constructed by implanting a plurality of electrodes in a pair of insulating supports, and a pair of insulating supports arranged to face the electrodes. Provided is an electron gun assembly having a recess formed in at least one part of the body.

Also provided is an electron gun assembly in which the outer diameter of the electrode facing the crank-shaped recess formed in the insulating support is smaller than the outer diameters of the other electrodes.

Also provided is an electron gun assembly in which the recesses of the pair of insulating supports are crank-shaped recesses or flat recesses.

Further, there is provided an electron gun assembly in which a circuit component including a resistor for supplying a voltage to the electrodes is arranged in a recess or a flat recess formed in the insulating support.

[0009]

Embodiments of the present invention will be described with reference to the drawings. 1 to 4 are cross-sectional views of essential parts of an electron gun assembly according to the present invention. In each figure, 1 is an electron gun assembly, 2 is a G1 electrode, 3 is a G2 electrode, 4 is a G3 electrode, 5 is a G4 electrode, 6 is a G5 electrode, and 7 and 70 are called BO glass for implanting these electrodes. A pair of insulating supports, 7a and 70a are recesses and wide flat recesses provided in each insulating support, 7b and 70b are resistors which are circuit components, and 10 is a neck tube.

As described above, in the color cathode ray tube having the electron gun assembly 1 for generating a multi-electron beam, each electron beam passes through a separate main electron lens,
It converges to a point on the target. This main electron lens is generally formed by an electrostatic field, and the electron beam is converged while passing through this electrostatic field.
This is realized by applying a predetermined voltage to the plurality of electrodes that constitute the.

FIG. 1 is a basic sectional view of an essential part of an electron gun assembly 1 according to the first embodiment of the present invention, and FIG. 2 is a schematic view showing voltage division from a resistor to each electrode. As shown in FIG. 1, the electron gun assembly 1 includes a cathode (not shown) that emits electrons and a G1 that controls, accelerates, and converges an electron beam.
It is composed of cylindrical electrodes such as electrode 2, G2 electrode 3, G3 electrode 4, G4 electrode 5, G5 electrode 6, etc. These electrodes are stacked with high precision by an assembly jig, and a pair of fused insulation The support 7 is formed by implanting the ends of the respective electrodes 2 to 6.

As means for applying a predetermined voltage to a predetermined electrode, a method of dividing the high voltage supplied to the G5 electrode 6, which is an anode, by a dividing resistance and applying it to the predetermined electrode, or applying it to a converging electrode, for example, the G4 electrode 5 is used. There is a method of dividing the generated voltage with a dividing resistor and applying it to another predetermined electrode. The first embodiment according to the present invention, in order to apply to at least one electrode,
Mainly to accommodate the voltage dividing resistor 7b,
This is to have a special shape in which a concave portion 7a is formed by forming a crank shape on the electrode side, which is opposed to a part of one of the pair of insulating supports 7 and which faces one part of the insulating support 7.

That is, since the resistor 7b can be arranged in the recess 7a provided in the crank shape in the insulating support 7 and fixed by frit glass or the like, even if the resistor 7b is a fixed resistance, the insulating support 7 The resistor 7b does not protrude further. That is, even when the electron gun assembly 1 including the resistor 7b is mounted on the neck tube 10 as described above, the gap between the electron gun assembly 1 and the neck tube 10 can be ensured, and the electron gun assembly 1 can be easily mounted. Will not be damaged. In the first embodiment, since the insulating support 7 is the concave portion 7a formed in a crank shape on the electrode side, a structure is adopted in which the outer diameter of the opposing electrode, for example, the G3 electrode is smaller than the outer diameters of the other electrodes. There is. As an example, a method of supplying voltage to each electrode via the resistor 7b will be described with reference to FIG.
Is shown in

3 to 4 show a second embodiment according to the present invention.
FIG. 3 is a basic sectional view of an essential part of the electron gun assembly 1 of FIG. The difference from the first embodiment described above is that the insulating support 70 is formed in which the concave portion in which the resistor 70b is arranged is a wide flat concave portion 70a. FIG. 3 shows an electron gun assembly 1
4 is a cross-sectional view of the main part of FIG. 4, and FIG. 4 is a cross-sectional view of the main part viewed from XX in FIG. 3. As shown, the insulating support 70 is
The wide flat recessed portion 70a having the wide flat recessed portion 70a formed in the insulating support 70 has a flat surface facing the electrode, and is formed by reducing the thickness of the insulating support 70 and widening the area thereof. Therefore, with the electron gun 1 according to the second embodiment,
Since the off-the-shelf electrodes can be used as they are, the size of the electrodes of the main lens portion can be secured and the focusing characteristics are not affected. The method of supplying a voltage to each electrode via the resistor 70b is basically the same as that in FIG. The wide flat recess 7
0a is formed so that the thickness of the insulating support 70 is thin and the area thereof is widened, but it is designed so that problems with quality such as withstand voltage and strength do not occur.

In any of the first and second embodiments described above, the recess 7a (70) provided in the insulating support 7 (70) is provided.
Regarding the position a), a recess may be formed in at least one of the insulating supports 7 (70) facing one of the plurality of electrodes. Of course, the recess may be formed in the pair of insulating supports 7 (70) from the viewpoint of common parts. In addition, the embodiment in which the resistor is arranged as the circuit component in the recess 7a (70a) provided in the insulating support 7 (70) has been described, but it is also possible to arrange and house the capacitor and the composite component.

[0016]

As described above, according to the electron gun assembly of the present invention, since the recess is formed in the insulating support and the resistor is arranged in this recess, even if the resistor is a fixed resistor, The resistor does not protrude more than the insulating support. That is, in an electron gun structure of a type that incorporates a resistor,
When this electron gun assembly is attached to the neck tube, the gap between the electron gun assembly and the neck tube can be secured, so that the electron gun assembly can be easily attached and damage to the electron gun assembly is reduced, and the withstand voltage characteristic is also secured. To be done. Furthermore, since the size of the electrode of the main lens portion can be secured, the focus characteristic can be guaranteed.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an electron gun assembly according to a first embodiment of the present invention.

2 is a schematic diagram showing voltage division from a resistor to each electrode in the electron gun assembly of FIG.

FIG. 3 is a sectional view of a main part of an electron gun assembly according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of the electron gun assembly shown in FIG. 3, viewed from the XX direction.

FIG. 5 is a sectional view of a main part of a conventional electron gun assembly.

[Explanation of symbols]

 1 Electron Gun Structure 2 G1 Electrode 3 G2 Electrode 4 G3 Electrode 5 G4 Electrode 6 G5 Electrode 7,70 Insulating Support 7a, 70a Recess (Wide Flat Recess) 7b, 70b Resistor (Circuit Component) 10 Neck Tube

Claims (4)

[Claims] 1. An electron gun structure in which a plurality of electrodes are implanted in a pair of insulating supports, wherein a recess for inserting a circuit component is formed in one portion of the pair of insulating supports. Structure. 2. The electron gun assembly according to claim 1, wherein the outer diameter of the electrode facing the recess formed in the insulating support is smaller than the outer diameter of the other electrode. 3. The electron gun assembly according to claim 1, wherein the recesses of the pair of insulating supports are crank-shaped recesses or wide flat recesses. 4. The electron gun assembly according to claim 1, wherein a circuit component including a resistor that divides a voltage to the electrode is arranged in a recess formed in the insulating support.