JPH05266830A - Electron gun structure for cathode-ray tube - Google Patents

Abstract

PURPOSE:To prevent the contact of a heater tape with other tapes, etc., that is likely to occur when assembling an electron gun structure for a cathode-ray tube and to facilitate the work of assembling the structure. CONSTITUTION:A heater tape L12 extended from a heater support L10 to which a heater is attached is so designed to be connected to the same nineth and tenth pin as a G1 tape 13 extended from a G1 electrode. Thereby the heater tape L12 can be greatly shortened, or removed, and the workability for assembling an electron gun structure for a cathode-ray tube can be significantly increased while the rate of imperfect contact between the heater tape L12 and other tapes, etc., can be reduced.

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 for a cathode ray tube, and more particularly to an electron gun assembly for a color cathode ray tube which can improve workability of an electron gun assembly by improving a voltage application system.

[0002]

2. Description of the Related Art As shown in FIG. 5, a voltage application circuit for each electrode (not shown after the focusing electrode) in a general electron gun assembly for a cathode ray tube is used to drive a heater power supply 5 for heating a heater 1 and a cathode 2. Cathode power source 6, and control electrode 3
Is connected to the control power source 8, and the acceleration electrode 4 is connected to the acceleration power source 7.

The connections to the stem for the circuit shown in FIG. 5 are often connected to the stem pin arrangement as shown in FIG.

As shown in Table 1, general electrode connections for such a stem pin arrangement are as follows: Focusing electrode for the first pin, blue cathode electrode / cathode B, 4th pin for the 2nd and 3rd pins. Pin (heater (+) electrode), pin 5 (heater) electrode, pin 6 (red cathode / cathode R), pin 7 (acceleration electrode), pin 8 (green cathode / cathode) A control electrode is connected to G, and pins 9 and 10.

[0005]

[Table 1]

Further, as shown in FIG. 6, the connection of the electron gun assembly for a cathode ray tube to the stem shown in Table 1 is such that the G1 tape 13 pulled out from the control electrode is connected to the 9th and 10th pins. There is. Further, the heater tape R11 pulled out from the heater support R9 is attached to the 4th pin on the heater support L
The heater tape L12 pulled out from 10 is connected up to the pin 5 on the opposite side so as not to come into contact with other connector tapes.

[0007]

As described above, in the conventional electron gun assembly for a cathode ray tube, since the heater support L10 and the fifth pin are on opposite sides, the heater tape L1 is attached.
Therefore, there is a problem in that it requires a large number of assembly steps, and that it easily comes into contact with other electrodes and connector tapes.

An object of the present invention is to provide an electron gun assembly for a cathode ray tube which can reduce the number of assembling steps and has no defective contact between electrodes and connector tapes.

[0009]

According to the present invention, there is provided a cathode, a heater for heating the cathode, a control electrode sequentially arranged at a predetermined interval in the traveling direction of an electron beam, and an accelerating electrode.
In an electron gun assembly for a cathode ray tube having a focusing electrode and a final accelerating electrode, one end of the heater is connected to the control electrode to have the same potential as the control electrode, and further, one end of the heater and the control electrode are set to the same potential. Is connected to the control electrode applying stem pin.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a circuit diagram of a voltage applying circuit for main electrodes in an embodiment of the present invention, FIG. 2 is a connection diagram of an example of a stem pin of a general electron gun assembly for a cathode ray tube, and FIG. 3 is an embodiment of the present invention. It is a side view which shows the outline of a structure of a stem pie.

As shown in FIG. 1, one end of the heating heater is connected to the heater power source 5 and the other end is connected to the control electrode 3, and further,
The control electrode 3 connected to one end of the heater 1 is connected to the control power supply 8.

The connection of the stem pin shown in FIG. 2 is used in a general color cathode ray tube and is called an RCA connection, and a projected view of the heater 1 and the heater supports L and R is also shown. The connection shown in Table 2, that is, the fifth pin is a non-connect (hereinafter referred to as NC), and the ninth pin is connected to the control electrode 3 and the (-) electrode of the heater 1.

[0014]

[Table 2]

By making such a connection, for example, as shown in FIG. 3, the heater tape L12 connected from the heater support L10 connected to the (-) electrode of the heater 1 is connected.
Since it can be connected to the 9th pin through the 10th pin, it is not necessary to connect the 5th pin on the opposite side with the heater tape L12 as in the conventional case. Since many connector tapes and electrodes are close to each other in an electron gun assembly for a general cathode ray tube, it is desirable to make the connector tapes shorter in order to prevent contact between the tapes.

FIG. 4 is a side view showing the outline of the structure of the stem pin of another embodiment of the present invention.

In the above-described embodiment, the method of connecting the heater support L10 and the 9th and 10th pins by the heater tape L12 has been described, but as shown in FIG. 4, the heater tape L1 is used.
No. 2 is directly used by the heater support L10,
The same effect can be obtained by connecting to pin 10.

[0018]

As described above, since the electron gun assembly for a cathode ray tube according to the present invention has a structure in which one end of the heater electrode is connected to the control electrode, the heater tape can be made significantly shorter or eliminated. As a result, the workability of assembling the electron gun is remarkably improved, and at the same time, the contact failure between the tapes can be reduced.

[Brief description of drawings]

FIG. 1 is a voltage application circuit diagram of a main part electrode in one embodiment of the present invention.

FIG. 2 is a connection diagram of an example of a stem pin of a general electron gun assembly for a cathode ray tube.

FIG. 3 is a side view showing a schematic configuration of a stem pin according to an embodiment of the present invention.

FIG. 4 is a side view schematically showing the configuration of a stem pin according to another embodiment of the present invention.

FIG. 5 is a voltage application circuit diagram of a main part electrode in a conventional electron gun assembly for a cathode ray tube.

FIG. 6 is a side view schematically showing an example of the configuration of a stem pin of a conventional electron gun assembly for a cathode ray tube.

[Explanation of symbols]

 1 heater 2 cathode 3 control electrode 4 acceleration electrode 5 heater power supply 6 cathode power supply 7 acceleration power supply 8 control power supply 9 heater support R 10 heater support L 11 heater tape R 12 heater tape L 13 G1 tape

Claims (2)

[Claims] 1. A cathode, a heater for heating the cathode, a control electrode sequentially arranged at a predetermined interval in the traveling direction of the electron beam, an acceleration electrode, a focusing electrode, and a final acceleration electrode. An electron gun assembly for a cathode ray tube, wherein one end of the heater is connected to the control electrode to have the same potential as the control electrode. 2. The electron gun assembly for a cathode ray tube according to claim 1, wherein one end of the heater and the control electrode, which have the same potential, are connected to a control electrode applying stem pin.