KR0184096B1 - Electron gun solid sphere for crt - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to an electron gun sphere for a cathode ray tube. In particular, the electrodes are stably fixed to an insulating support to prevent shaking, thereby preventing deterioration. Thus, a triode and an electron beam composed of a cathode, a control electrode, and an acceleration electrode generating an electron beam are provided. At least one of the electrodes of the in-line electron gun composed of a main lens portion consisting of a first acceleration / focusing electrode, a second acceleration / focusing electrode, a third acceleration / focusing electrode and a fourth acceleration / focusing electrode to accelerate and focus to form a fluorescent surface A cutout is formed at a portion coinciding with the center of the center hole so that the electrode is easily inserted into the end portion of the depression with the insulating support, and long horizontal holes are formed at the left and right sides of the cutout in a horizontal direction parallel to the electrode hole. Between the cutout and the central hole of the electrode was composed of an electrode formed with a longitudinal hole long in the vertical direction with the horizontal hole (24).

Description

Electron gun sphere for cathode ray tube

1 is a cross-sectional view of a typical cathode ray tube.

2 is a front view showing a cathode support of a typical cathode ray tube.

3 is a structural diagram of a conventional cathode ray tube electrode.

4a, b, and c are diagrams of depressions of a conventional cathode ray tube electrode.

5 is a structural diagram of a cathode ray tube electrode of the present invention.

6 is an enlarged view of a depression of the cathode ray tube electrode of the present invention.

* Explanation of symbols for main parts of the drawings

119: side hole 121: depression

120: central hole 124: horizontal hole

122: cutout portion 126: heat transfer support

125: Jong-ong

The present invention relates to an electron gun sphere for a cathode ray tube, in particular, the electrodes are stably fixed to the insulating support to prevent shaking to prevent degradation.

The electrode of a conventional inline type electron gun for a cathode ray tube is an electron beam so that the electron beams 13, 14, and 15 generated from the cathode 3 can be controlled to a certain intensity and shape to reach the fluorescent surface 17 as shown in FIG. (13, 14, 15) are arranged at regular intervals from each other to be perpendicular to the path through which they pass.

That is, the control electrode 4, which is a common structure of three independent cathodes 3 and three cathodes 3, which are arranged at a predetermined distance from the cathode, and the control electrodes 4, which are arranged at regular intervals, are disposed. In order of the accelerating electrode 5, the first acceleration / focusing electrode 6, the second acceleration / focusing 7, the third acceleration / focusing electrode 8, and the fourth acceleration / focusing electrode 9 in that order. Configured.

The electron gun emits hot electrons from the cathode 3 by the heat generated by the heater 2 built-in the cathode 3 from the stem pin 1 and generates heat, and the electrons are discharged to the control electrode 4. The electron beams 13, 14, and 15 are controlled by the acceleration electrodes 5, and the electron beams are accelerated by the acceleration electrodes 5, and the first acceleration / focusing electrode 6, which is a prefocus lens forming electrode, and the second acceleration / focusing electrode ( 7) and the third acceleration / focusing electrode 8 reduces the divergence angle of the electron beams 13, 14, and 15, and the third acceleration / focusing electrode 8, which is the main lens forming electrode, and the fourth acceleration / focusing electrode. By concentrating and accelerating by (9), it was configured to pass through the shadow mask 16 provided in front of the fluorescent surface 17 and collide with the fluorescent surface 17 to emit light.

In the cathode support, a plurality of electrodes (acceleration electrode-fourth acceleration / focusing electrode) are fused and fixed at regular intervals by a plurality of insulating supports 26, as in the second diagram. The electrodes arranged at regular intervals were previously heated to a predetermined temperature to make the insulator semi-melted, and then fused and fixed to the recess 21 which is an outer portion of each electrode.

Here, after the electrodes are fusion-fixed to the insulating support 26, heat is generated from the cathode 3 so that each of the electrodes receives heat and expands, and the control is located relatively close to the cathode 3 of the electrodes. The electrode 4 receives the most heat, and then receives the heat in the order of the acceleration electrode 5, etc. Among the electrodes, the control electrode 4 and the acceleration electrode 5 are formed in one plate shape. As a result, the effect of heat is increased, and when the fusion with the insulator becomes unstable, the effect of heat is also increased.

Accordingly, when the shape of the depression 21 shown in FIG. 3 is provided, only the shape of the simple cutout 22 is installed in the depression 21 with the insulating support 26, so that the degree of coupling is weak and the cathode ray tube may not be formed. When the expansion caused by the heat generated during operation occurs due to the expansion caused by the sliding phenomenon in the direction of the central hole 20 and the side hole 19 opposite to the direction in which the insulating support 26 is located, the cathode ray tube Its characteristics also bring bad results.

When the shape of the control electrode 4 and the depression 21 of the acceleration electrode 5, which are formed in the shape of the electrode, in particular one plate, of the electron gun, the coupling with the insulating support 26 is reduced. As a result of the shaking of the electrodes, a lot of defects are generated, which significantly lowers the productivity of the electron gun.

Therefore, the expansion caused by the heat generated during the operation of the cathode ray tube directly affects the electrode, thereby adversely affecting the characteristics of the cathode ray tube, thereby causing a problem that the cathode ray tube reliability is significantly disadvantageous.

In view of this point, the present invention has the shape of the recessed portion fused to the insulating support in the electrodes, which is formed by the cutout, the horizontal groove, and the longitudinal groove to improve the bondability with the insulating support, and the electrodes are stably fixed to the insulating support to improve productivity. And the quality characteristics are good, and as a result, the aim is to provide an electron gun with excellent reliability.

EMBODIMENT OF THE INVENTION The electron gun sphere for cathode ray tubes of this invention is demonstrated in detail by FIG.

In forming the recess 121 recessed in the insulating support 126, the cutout 122 is formed in the central portion of the end of the recess 121 in order to improve the depression to the insulating support 126. In order to compensate for the slidability due to the cutout 122 and the horizontal and vertical expansions, the horizontally long horizontal holes 124 were provided as opposed to the vertically long vertical holes 125.

In detail, the cutting part 122 is disposed at the central portion of the distal end portion of the depression 121 to improve the depression to the insulating support 126, and the insulation support when the expansion caused by the heat generated during operation of the cathode ray tube occurs. In order to prevent the occurrence of the rolling in the opposite direction of (126) was installed one by the left and right around the horizontal hole 124 in the direction parallel to the direction in which the central hole 120 and the side hole 119 is located.

In addition, in order to enhance the bond with the insulating support 126, the vertical longitudinally longer portion at the lower end of the cutout 122, which is the center of the horizontal hole 124 is located as opposed to the horizontal horizontal hole 124 is formed horizontally long Long hole 125 was installed.

According to the present invention configured as described above, the shape of the recess 121 of the electrode improves the bondability with the insulating support 126 and the effect of thermal expansion is also reduced, resulting in a considerably good result in terms of productivity and quality of the electron gun. Therefore, all the characteristics of cathode ray tube can be manufactured in the original design.

That is, when the insulating support 126 receives heat, the recess 121 of the electrode is embedded in the semi-melt state, and the cutout 122 serves to facilitate the embedding, and the horizontal hole 124 and the longitudinal hole ( It is embedded in the semi-molten insulated support part in the hole of 125 to improve the coupling, and also prevents the vertical and horizontal flow in the recess 121 by the formation of longitudinal holes and horizontal holes 125 and 124. .

Therefore, not only the resolution (focus) characteristic of the cathode ray tube is significantly improved, but also the productivity is increased due to the reduction of the defective rate during fabrication of the anode support, so that the effect of the cathode ray tube can be significantly higher.

Claims (1)

The first acceleration / focusing electrode, the second acceleration / focusing electrode, the third acceleration / focusing electrode, and the fourth acceleration-focusing electrode, which are composed of a cathode, a control electrode, and an acceleration electrode, which generate an electron beam, are accelerated and focused to form a fluorescent surface. In the in-line electron gun composed of the main lens portion of the acceleration / focusing electrode, at least one of the electrodes is formed in the cut portion in the portion coinciding with the center of the center hole so that the insertion of the end portion of the depression with the insulating support for easy insertion, The long hole is formed in the horizontal direction parallel to the side hole and the central hole on the left and right sides of the cutout, and the electrode is formed between the cutout and the central hole of the electrode. Electron gun sphere for cathode ray tube, characterized in that.