JPH087777A - Vibration control structure of color identification electrode with slit - Google Patents

Abstract

(57) [Summary] [Object] To provide a vibration damping structure of a color identification electrode with a slit, which has a large vibration damping effect without adversely affecting the screen of a CRT and inducing higher-order vibration such as surface vibration. A vibration damping structure for a color identification electrode with a slit for a color cathode ray tube, wherein a vibration damping member is provided on at least the lower end face portion of the upper and lower end face portions 25 other than the slit 22 forming portion of the slit color identification electrode 21. 30 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure for a color identification electrode with a slit, and more particularly to a vibration control structure for a color identification electrode with a slit applied to a color CRT.

[0002]

2. Description of the Related Art In a color cathode ray tube (CRT) such as Trinitron (trademark), a color identification electrode with a slit (aperture grill: AG) 1 is used as an electron beam color identification electrode as shown in FIG. In FIG. 5, 2 is a panel, 3 is a funnel, 4 is a neck tube, 5 is an electron gun arranged in the neck tube 4, and the AG 1 is supported by a frame 6.

FIG. 6 shows the AG1 and the frame 6 shown in FIG.
FIG. 10 is a perspective view showing a conventional color-damping structure, as well as showing a slitted color identification electrode mechanism.

As shown in FIG. 6, a substantially rectangular aperture grille (AG) 1 is stretch-welded to substantially parallel frames 6a whose upper and lower ends are opposed to each other. Two frames 6
a is welded to the opposing frame 6b to form a substantially rectangular frame body.

In a speaker-integrated monitor or a high-resolution monitor, the above-mentioned slit color identification electrode is apt to vibrate, and this vibration causes the image on the CRT to be disturbed.

FIG. 7 is a diagram showing a vibration transmission path from the speaker in the speaker-integrated monitor, and the vibration emitted from the speaker 11 as a vibration source is the case 1.
2, electric circuit 13, glass bulb 14, grill support 1
The signal is transmitted to the color identification electrode with slit (AG) 1 via 5, etc. In order to suppress the vibration of the color identification electrode, as shown in FIG. 6, a slit portion (or an AG tape portion) of the electrode is provided.
Thin enough to be orthogonal to (diameter 15-20μ
About 1 to 3 metal wires 10 of about m) are stretched. This metal wire 10 is usually called a damper wire. Both ends of the damper wire 10 are welded to the damper spring 7 attached to the frame 6b. In FIG. 6, 9
Is an AG spring for fixing the AG1 in the panel 2 of the CRT.

[0007]

The damper wire 10 for preventing the vibration of the above-mentioned color identification electrode appears as a horizontal line on the CRT screen and also serves as a node of vibration to cause higher-order vibration such as surface vibration. It also becomes.

In order to minimize the horizontal line due to the damper wire 10 described above, the thickness of the damper wire is minimized. Therefore, the damping effect of the damper wire may not be sufficient depending on the condition of external vibration.

In view of the above problems, the present invention provides a vibration damping structure of a color identification electrode with a slit, which has a large vibration damping effect that does not adversely affect the screen of a CRT and does not induce higher-order vibration such as surface vibration. With the goal.

[0010]

In order to solve the above problems, a vibration damping structure for a color identification electrode with a slit according to claim 1 of the present invention is a vibration damping structure for a color identification electrode with a slit for a color cathode ray tube. Then, a vibration damping member is provided on at least the lower end face portion of the upper and lower end face portions other than the slit forming portion of the slit color identification electrode.

According to a second aspect of the present invention, there is provided a vibration damping structure for a color identification electrode with a slit, in which vibration damping members are provided on upper and lower end surface portions other than the slit forming portion of the color identification electrode with a slit. Characterize.

According to a third aspect of the present invention, there is provided a vibration damping structure for a color identification electrode with a slit, wherein the vibration damping member comprises a plurality of pendulums.

According to a fourth aspect of the present invention, there is provided a vibration damping structure for a color identification electrode having a slit according to the first or second aspect, which is a tape-shaped vibration damping material.

According to a fifth aspect of the present invention, the vibration suppression structure for the color identification electrode with slits is characterized in that it is provided on at least the front side of the color identification electrode with slits.

[0015]

According to the present invention, the damping member is provided on at least the lower end face portion of the upper and lower end face portions other than the slit forming portion of the slit color identification electrode. Therefore, when the thin plate-shaped electrode vibrates, the vibration is suppressed without causing horizontal lines on the screen or higher-order vibration.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of a vibration damping structure for a color identification electrode with slit according to the present invention. In particular, FIG. 1A is a schematic front view of an AG 21 according to the present invention, in which a large number of parallel slits 22 are provided in a normal thin steel plate. An AG tape 23 is provided between the slits 22. The rectangular portion provided with the slit 22 substantially corresponds to the screen of the CRT. In this embodiment, the pendulum 26 (shown by a broken line) as a vibration absorbing member also shown in the enlarged view of FIG. 1B is provided on the upper and lower end surface portions 25 of the AG 21 where the slit 22 is not provided. After that, the AG shown in FIG. 1A is attached to the frame by welding. This state is shown in FIG.

As shown in FIG. 2, the pendulums 26 provided on the upper and lower end surface portions 25 of the AG 21 are provided on the slits 22, that is, on the surface parallel to the AG tape surface. Hereinafter, the pendulum 26 will be described with reference to FIG. 1B, which is an enlarged view of the portion A of FIG. The pendulum 26 of this embodiment is provided at one place for each of the 2 to 4 slits 22. This pendulum 26
Is attached by welding to a hole 47 provided in the end face portion 25 near the slit end. The pendulum 26 includes a swinging portion 28 made of a thin metal wire having a diameter of about 0.05 mm and a length of about 2 mm, and a disk-shaped vibrator 30 having a diameter of about 1 mm.
It consists of

A large number of such pendulums 26 are provided on the upper and lower end surface portions 25 of the AG as shown in FIGS. 1 and 3, and when the vibration shown in FIG. 7 is transmitted to the electrode (AG), the pendulum 26 causes the vibration. Energy is absorbed and the vibration of the AG 21 is suppressed.

In the first embodiment, as shown in FIG. 3A, the pendulum 26 is provided only on one side (front surface side) of the AG 21, but as shown in FIG. It is also possible to provide 26 on both the front surface side and the back surface side. In FIG. 3B, the vibrator on the front surface side is 30a and the vibrator on the back surface side is 30b. When the pendulum 26 is provided on both sides as shown in FIG.
Each size of 0b can be made smaller than the size of the vibrator provided on one surface shown in FIG.

4A and 4B are schematic views for explaining a second embodiment of the vibration damping structure for the color identification electrode with slits according to the present invention. Particularly, FIG. 4A is a perspective view and FIG. 4B is a schematic view. Figure 4 (a)
FIG. In the second embodiment, a band-shaped (tape-shaped) vibration damping material 31 that is easy to make to absorb vibration is used.
It is provided on the upper and lower end face portions 25 of G21. The size of the vibration damping material 31 was such that W of the end face was 2 mm, H was 5 mm, and the lateral length was a portion where the slit 22 was formed. As the material of the vibration damping material 31, a carbon graphite fiber or the like in a tape shape is used.

When the vibration shown in FIG. 7 is transmitted to the electrodes,
Vibration energy is absorbed by the damping material 31, and the AG21
Vibration is suppressed.

In the second embodiment as well, as in the first embodiment, the damping material 31 is provided only on one surface (front surface side) of the AG 21,
It is also possible to provide it on both sides of the AG 21.

In the above embodiment, the pendulum 26 for absorbing vibration and the damping material 31 are provided on the upper and lower end face portions 25 of the AG 21.
However, the vibration can be suppressed by providing only the lower end surface portion 25.

[0024]

As described above, according to the present invention, the vibration of the slit color identification electrode (aperture grill) can be suppressed without providing the damper wire which is the conventional damping member. Therefore, horizontal lines and higher-order vibrations on the CRT screen can be prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a vibration damping structure for a color identification electrode with slit (AG) according to the present invention.

FIG. 2 is a perspective view showing a state where the AG of the first embodiment is attached to a frame.

FIG. 3 is a schematic cross-sectional view showing a mounting surface of a pendulum.

FIG. 4 is a diagram showing a second embodiment of the vibration damping structure of the color identification electrode with slit (AG) of the present invention.

FIG. 5 is a schematic configuration diagram of a color CRT.

FIG. 6 is a perspective view showing a conventional vibration damping structure of a color identification electrode with slit (AG).

FIG. 7 is a configuration diagram showing a vibration transmission path from a speaker in a speaker-integrated monitor.

[Explanation of symbols]

 1 Aperture Grill (AG) 2 Panel 3 Funnel 4 Neck Tube 5 Electron Gun 6, 6a, 6b Frame 7 Damper Spring 9 AG Spring 10 Metal Wire (Damper Wire) 11 Speaker 12 Housing 13 Electric Circuit 14 Glass Valve 15 Grill Support 21 AG 22 Slit 23 AG Tape 25 End Face 26 Pendulum 27 Hole 28 Swing Part 30, 30a, 30b Transducer

Claims (5)

[Claims] 1. A vibration damping structure for a color identification electrode with a slit for a color cathode ray tube, wherein a vibration damping member is provided on at least a lower end face portion of the upper and lower end face portions other than the slit forming portion of the slit color identification electrode. A vibration damping structure for a color identification electrode with a slit, which is provided. 2. The vibration damping structure for a color identification electrode with a slit according to claim 1, wherein a vibration damping member is provided on upper and lower end surface portions of the color identification electrode with a slit other than a slit forming portion. 3. The vibration damping structure for a color identification electrode with a slit according to claim 1, wherein the vibration damping member comprises a large number of pendulums. 4. The vibration damping structure for a color identification electrode with slit according to claim 1, wherein the vibration damping member is a tape-shaped vibration damping material. 5. The vibration damping structure for the color identification electrode with slit according to claim 1, wherein the vibration damping member is provided at least on the front side of the color identification electrode with slit.