JPH04163830A - Color selecting electrode device of color cathode-ray tube - Google Patents

Abstract

PURPOSE:To provide a color select electrode with a uniform tension using a simple and lightweight structure without sacrificing the frame rigidity by installing the electrode as set over between frames, and giving a tension to this electrode with the restoring force of support pieces consisting of a spring material. CONSTITUTION:A load is applied between frames 21a, 21b facing each other, and support pieces 22 consisting of a spring material are deflected a certain amount within the electric range, and the span between the frames 21a, 21b is compressed, where a number of thin element wires 11 are set over and welded fast. If the load is removed, the restoring force of the support pieces 22 gives required unifor tension to the element wires 11, and even though a thermal expansion is generated in the element wires 11 by irradiating with electron beam, the resultant elongation of the wires is set off with the displacement of the support pieces 22, and the element wires 11 will have approx. the same tension as the initial value. Thus a tension distribution having required uniform tention can be obtained using a simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color selection electrode device for regulating the arrival position of an electron beam of a color cathode ray tube.

[Conventional technology]

Generally, in a color cathode ray tube, a panel part 3 is frit-welded to the open end of a funnel part 2 having a neck part 1 to form a tube sphere 4, as shown in FIG. A fluorescent screen 6 is formed on the inner surface of a face plate 5 of the panel section 3, and a color selection electrode device 7 is installed opposite to the fluorescent screen 6. Electron beams 9 corresponding to each color, for example, red, green, and blue, emitted from an electron gun 8 installed in the neck portion 1 are regulated by a color selection electrode device 7 and sent to a fluorescent screen 6.
, each landing on a phosphor of a corresponding color.

FIG. 6 is a perspective view showing a conventional color selection electrode device for a color cathode ray tube.
These are the left and right frame arm portions provided across between a and 10b. A large number of strip elements 11, which are color selection electrodes, are arranged in a stretched manner on the front end faces of opposing frame sides 10a and 10b. Furthermore, several damper wires 12 as vibration damping materials are provided so as to intersect with the strip element body 11.

This color selection electrode device 7 is attached within the panel section 3 at three to four points.

Next, a method of manufacturing the color selection electrode device for this color cathode ray tube will be explained.

A conventional color selection electrode device includes a pair of opposing frame sides 10a,
A load is applied between the frame sides 10b, and a pair of frame side arms 10c and 10d made of an elastic body are deflected by a predetermined amount within the elastic range to form the frame side 10a.
, 10b, and in this state, the frame sides 10a, 10b are compressed.
When the strip element 11 is stretched between them and fixed by welding, and then the load applied between the frame sides 10a and 10b is removed,
The compressed frame sides 10a and 10b are restored by the restoring force of the elastic body, and tension is applied to the stretched strip element 11.

[Problem to be solved by the invention]

Since the color selection electrode device of a conventional color cathode ray tube is constructed as described above, the required tension is applied to the strip element body in order to prevent the strip element body from resonating due to vibrations applied from the outside and causing the screen to shake. Giving is important. In order to provide this tension, the frame structure becomes complicated and the weight of the frame becomes large. In addition, it is difficult to obtain the required tension evenly across the surface; for example, the tension is different between both ends of the frame and the center, which necessitates the use of a damper wire as a damping member for the strip element. There was a problem in that the linear motion was projected onto the screen when the cathode ray tube was operating.

This invention was made to solve the above-mentioned problems, and has a simple and lightweight structure that makes it possible to obtain uniform tension of the color selection electrode without reducing frame rigidity, and to improve the vibration damping time constant. An object of the present invention is to obtain a color selection electrode device for a color cathode ray tube that can suppress the noise to a low level.

[Means to solve the problem]

The color selection electrode device for a color cathode ray tube according to the present invention provides a support piece using a spring material between the frame bodies to give a required uniform tension to the color selection electrode, and uses the restoring force of the support piece to perform color selection. It is designed to apply tension to the electrode.

[Effect]

In this invention, a load is applied to a pair of opposing frames, a support piece made of a spring material provided between the frames is compressed to a predetermined deflection within an elastic range, and in this state color separation is performed between the frames. By stretching the electrodes and fixing them by welding, and then removing the load between the frames, the space between the frames, which had been compressed due to the restoring force of the support piece (spring material), is stretched and stretched.
The required uniform tension is applied to the color selection electrodes (fixed by welding), and as a result, the damper wire can be omitted. [Example] Hereinafter, an example of the present invention will be explained with reference to the drawings. do.

FIG. 1 shows a perspective view of a color selection electrode device for a color cathode ray tube according to an embodiment of the present invention, in which the same reference numerals as in FIG. It has a letter-shaped frame, and its cross section is U-shaped. 22
is this frame body 21a.

21b, for example, made of stainless steel 5u.
This is a support piece made of a spring material such as S631. A large number of strip elements 11 made of metal, for example, are strung and arranged as color selection electrodes on the front surfaces of the face plates of the opposing frames 21a and 21b.

Next, the operation will be explained.

In the color selection electrode device of this embodiment, a load is applied between the opposing pair of frames 21a and 21b, and the supporting piece 22 made of a spring material is deflected by a predetermined amount within the elastic range.
, 21b.

In this state, a large number of strip elements 11 are stretched between the frames 21a and 21b, welded and fixed, and then the frame 21a is formed.

When the load placed between 21b is removed, the support piece 22
The frame body 21a was compressed due to the restoring force of the frame body 21a.

The strip element 11 which has been stretched and fixed by stretching and welding between 21b and 21b is manufactured so as to have a required uniform tension and a uniform tension distribution.

When such a color selection electrode device is in operation, that is, when the color selection electrode and the fluorescent screen are irradiated with an electron beam, the metal strip element body 11 is irradiated with the electron beam, so that the metal strip element body 11 is irradiated with the electron beam. is heated and the temperature rises to about 100 degrees,
For this reason, each metal strip element body 11 undergoes thermal expansion, or the elongation due to this thermal expansion is offset by the restoring force of the displaced (compressed) support piece 22, and each metal strip element body 11 has an initial tension. A tension approximately equal to that will be applied.

According to this embodiment, since the restoring force of the support piece 22 is used to tension and stretch the strip element, the required uniform tension can be obtained, and the strip element body can be tensioned by using the restoring force of the support piece 22. Resonance of the strip body 11 can be prevented, and damper wire stretching can be omitted.

Moreover, since the frames 21a and 21b are made U-shaped in cross section to increase rigidity, the color selection electrode device can be made smaller and lighter.

In the above embodiment, as shown in FIG. 2, a large number of strips (stripe) elements 11 are arranged as color selection electrodes between a pair of opposing frames.
Although a stretched thin plate 11' is shown, it can also be used to stretch a thin plate 11' having a large number of electron beam transmission holes as shown in FIG.

Further, in the above embodiment, a buckling plate spring is used as the support piece 22, but the shape of the support piece is not limited to this, and for example, a coil spring or the like may be used.

Furthermore, as shown in FIG. 4, if necessary, in order to increase the strength of the frame in the long side direction on which the strip element 11 is stretched, this portion may be made into a radius shape, or the frame may be twisted. To prevent this, various modifications may be made, such as welding the metal plate 31 across the frames 21a and 21b.

〔Effect of the invention〕

As described above, according to the color selection electrode device for a color cathode ray tube according to the present invention, the tension of the color identification electrode is obtained by the support piece made of a spring material, so that the required uniform tension can be achieved with a simple configuration. It is possible to obtain a tension distribution, and as a result, it is possible to omit the need to stretch damper wires for vibration damping.
This has the advantage that high-definition image quality can be obtained, and the device can also be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a color selection electrode device for a color cathode ray tube according to an embodiment of the present invention, FIGS. 2 and 3 are views showing different types of color selection electrodes, and FIG. A fifth perspective view showing a modification of the color selection electrode device of a cathode ray tube.
This figure is a block diagram of a color cathode ray tube including a color selection electrode device, and FIG. 6 is a perspective view of the color selection electrode device of a conventional color cathode ray tube. In the figure, 11 is a strip element (color selection electrode), 21a,
21b is a frame body, 22 is a support piece, and 31 is a metal plate. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A color selection electrode device for regulating the arrival position of an electron beam of a color cathode ray tube, which includes a pair of frames that span the color selection electrodes, and a spring member that holds the pair of frames at a predetermined interval. A color selection electrode for a color cathode ray tube, characterized in that the color selection electrode provided across the pair of frames is stretched under tension by the restoring force of the support piece. Device.