KR100347224B1 - Device for Supporting Shadow Mask of Color cathode Ray Tube - Google Patents

Abstract

The disclosed subject matter relates to a color-selective electrode support structure of a color picture tube to suppress vibration of a shadow mask and miss-landing phenomenon of an electron beam caused by disturbance from outside of the color picture tube.

The disclosed color-coded electrode support structure comprises a base plate having a thickness thinner than the frame support spring and having the same material between the stud pin and the frame support spring at least two or more of the coupling portions of the stud pin and the frame support spring of the panel to be symmetrically. Arranged and configured;

As a result, the miss landing phenomenon of the electron beam caused by the magnetization of the existing vibration damping alloy material is healed, and the thermal deformation caused by the deformation and welding due to the decrease in strength and hardness during the wet test or the drop test is healed. There is an advantage that the convenience of handling images and processes is provided.

Description

Device for Supporting Shadow Mask of Color cathode Ray Tube}

The present invention relates to the prevention of howling of color-selective electrodes in a cathode ray tube (CRT) such as a color receiving tube. Specifically, the vibration of the color-selective electrodes by sound wave transmission from the outside of the tube during operation of the color receiver. (Iii) relates to a color-selective electrode support structure of a color receiver which suppresses howling phenomenon caused by mis-landing of an electron beam.

In general, cathode ray tubes are applied to television receivers and monitors, which are widely used in homes, offices, and industrial sites as image display devices, and in particular, screens are being enlarged due to technology improvement and consumer's preferences.

In addition, in the case of a color television receiver to which the cathode ray tube is applied, as is well known, most screens are being flattened, and thus the curvature of the shadow mask, which is a color-specific electrode, is also flattened. have.

Along with this, the structural strength of the shadow mask is weakened, causing color bleeding due to the dustproof characteristics of the shadow mask due to sound waves or disturbance transmission from outside the tube during cathode ray tube operation.

In other words, the color receiver tube of the television receiver is a substantially rectangular phosphor screen including a dot- or stripe-shaped three-color phosphor layer that emits blue, green, or red light. ), And a shadow mask, which functions as a screening electrode, is welded to the frame in the funnel facing the phosphor screen.

In addition, the frame supporting the shadow mask is supported on the panel by three or four color-coded electrode supports, and one base of the color-coded electrode supports has a base plate and the base plate is welded to the frame. It is interposed between the frame support spring and the stud pin formed in the panel is welded.

In such a color television receiver, a speaker is installed around a color receiving tube to reproduce an audio signal. In recent years, vibration energy or disturbance generated from the speaker due to the trend of higher output of the speaker due to the multiplication is applied to the panel and the base. It is transmitted to the plate, the frame support spring and again to the almost rectangular shadow mask which is the frame, the dichroic electrode, thereby causing vibration.

Accordingly, the natural frequency of the shadow mask causes resonance to maximize the vibration, which is called howling.

Such howling can visually monitor the occurrence of luminance change or color change on the screen.

In addition, when the above howling occurs, a predetermined positional relationship between pores or slits formed in the shadow mask and the phosphor applied to the inner surface of the panel is removed at the resonance point, thereby preventing the electron beam from constantly reaching the desired phosphor screen. As a result, a luminance change or a color change occurs.

However, in recent years, a color-selective electrode support structure for absorbing unnecessary vibrations from outside the tube during the color receiving tube operation and healing the vibration and color bleeding of the shadow mask has been devised.

The color-coded electrode support structure for absorbing undesired vibration in such a general color receiving tube has a base plate formed of a vibration damping material such as a vibration damping alloy at one of the color-coded electrode support portions. It is known by Unexamined-Japanese-Patent No. 5-89793.

1 and 2 show one of such color-coded electrode support structures described in Japanese Laid-Open Patent Publication No. 5-89793.

1A shows a state where the shadow mask is supported by the axial support method of the panel.

As shown in FIG. 1A, the axial support method in the color-coded electrode support structure includes three or four color-coded electrode support portions 103 for supporting the shadow mask 102 which is a color-coded electrode. To 106 are supported by the panel 100.

In other words, the frame 101 is connected to the panel 100 by matching the frame supporting springs 107 to 110 of the color selection electrode supports 103 to 106 with the stud pins 111 to 114 formed on the inner wall of the panel 100. Supported.

One of the three or four color-coded electrode support portions 103 to 106 has a base plate 115 for suppressing vibration of the shadow mask 102.

FIG. 2A is an exploded perspective view showing an enlarged color-dividing electrode support 103 having the base plate 115 in the axial support method of FIG. 1A.

In the color-selective electrode support part 103 having the base plate 115, the frame 101, the fixed plate member 116, and the frame support spring 107 are welded, and the mold holes formed in the frame support spring 107 are welded. As described above, the frame 101 is supported by the panel 100 by the combination of the 118 and the stud pins 111 formed on the inner wall of the panel 100.

The base plate 115 is made of a vibration damping material such as Fe-Cr-Al alloy. The mold hole 117 of the base plate 115 is smaller than the mold hole 118 of the frame support spring 107.

The base plate 115 is inserted between the stud pin 111 of the panel 100 and the frame support spring 107 and the shadow mask 102 is coupled to a predetermined position, and then the base plate 115 The frame support spring 107 is welded and joined.

The color selection electrode support structure is absorbed in the process of the vibration from the outside through the color selection electrode support (103 to 106), as a result of which the vibration of the shadow mask 102 is suppressed.

In other words, when the panel 100 subjected to disturbance from outside the tube vibrates during operation of the color receiving tube, the vibration is transmitted to the stud pins 111 to 114 of the panel 100 and then the frame support spring. It is transmitted to the (107 to 110) and the fixed plate 116, and the frame 101.

At this time, the base plate 115 interposed between the frame support spring 107 on the vibration path and the stud pin 111 and formed of a vibration damping material absorbs vibration transmitted from the stud pin 111 of the panel 100. It weakens, and with this, vibration of the shadow mask 102 is suppressed and the phenomenon of color bleeding is prevented.

1B illustrates a state in which a shadow mask is supported by a corner support method of a panel, and FIG. 2B is an exploded perspective view showing an enlarged color selection electrode support part by the corner support method.

In the corner support method, the frame 101 supporting the shadow mask 102, which is a color screening electrode, in the same manner as the axial support method of FIGS. 1A and 2A, has three or four color screening electrode supports 103a to 106a. ) Is supported by the panel 100.

In other words, the frame support springs 107a to 110a welded to the fixed plate member 116a of the color selection electrode supports 103a to 106a and the stud pins 111a to 114a formed at the inner wall corners of the panel 100. The frame 101 is supported by the panel 100, and at one of the three or four color-dividing electrode support portions 103a to 106a, as shown in FIG. 2B, vibrations such as a Fe-Cr-Al alloy are provided. It is formed of a damping material, and has a mold hole (117a) in the center and is welded to the stud pin (111a) to match the mold hole (118a) of the frame support spring (107a) to suppress the vibration of the shadow mask 102 The base plate 115a is installed.

Since the operation of the color selection electrode support structure by the corner support method made in this way is the same as the axial support method of FIGS. 1A and 2A, it will be omitted.

According to the conventional technique described above, a base plate formed of a vibration damping material is provided on the color discriminating electrode support at any one of three or four places to suppress transmission of unnecessary vibration from outside the tube to the shadow mask. It can be seen that to prevent the occurrence of color bleeding.

However, such a color-selective electrode supporting structure has a problem in that it is necessary to alloy such a vibration damping metal first in order to form the base plate into a vibration damping alloy and causes a problem of an increase in material cost.

In addition, when such a material is magnetized, there is a risk of deterioration of the color receiving tube due to mis-landing of the electron beam, and only one base plate for vibration damping is installed. There is a problem that the external vibration is transmitted to the shadow mask through.

In addition, the vibration damping alloy material is generally low in strength and hardness, which may cause deformation in the wet test or the drop test, thereby deteriorating the color discrimination function of the shadow mask. The base plate is heated by high temperature heat transfer by welding. Because of the possibility of deformation, there are inherent difficulties in use that require precise verification.

In addition, as a method of avoiding the fear of deformation due to the increase of the material cost, the strength, and the hardness caused by the application of the vibration damping alloy material, the natural frequencies of the shadow mask, panel, cabinet, etc. are not overlapped with each other. It is also conceivable that resonance does not occur, but it requires the difficulty of adding geometrical limitations and work processes in a separate cabinet set.

Therefore, the anti-landing prevention and the deterioration of the color selection electrode function of the color receiving tube according to the use of the vibration damping alloy, and the color selection electrode support structure that can achieve the same or more effects than the conventional one while simplifying the work process desirable.

Accordingly, the present invention excludes the concern of thermal deformation of the base plate caused by the use of the vibration damping alloy material, deterioration of color discrimination function and miss landing phenomenon of the electron beam in the above-described prior art. In order to more accurately absorb and attenuate symmetrical vibrations coming from outside the tube during operation of the color receiving tube, it is possible to provide a color-selective electrode supporting structure of the color receiving tube to suppress color bleeding. Characterized in that the base plate of the same material as the spring is arranged symmetrically.

Another object of the present invention is to provide a color-selective electrode supporting structure which prevents thermal deformation of the base plate due to welding and weakens severe howling phenomenon caused by matching of the natural vibration of the shadow mask with the vibration outside the tube. This structure is characterized in that the base plate of the same material as the frame support spring is disposed between the frame and the frame support spring.

1 is a view showing a state in which a shadow mask is supported on a panel in a general color receiving tube.

(a) shows the state that the shadow mask is supported by the axial support method of the panel,

(b) shows that the shadow mask is supported by the corner support method of the panel,

FIG. 2 is an exploded perspective view illustrating an enlarged color-dividing electrode support of FIG. 1.

(a) is an enlarged view of the color-selective electrode support part by the axial support method,

(b) is an enlarged view of the color-selective electrode support part by the corner support method,

3 is a view showing a state in which a shadow mask is supported on a panel in a color receiving tube according to the present invention;

(a) shows the state that the shadow mask is supported by the axial support method of the panel,

(b) shows that the shadow mask is supported by the corner support method of the panel,

FIG. 4 is an exploded perspective view showing an enlarged screen of the color selection electrode support of FIG. 3;

(a) is an enlarged view of any one of the color-screening electrode supports of at least two color-coded electrode supports in the axial support method of FIG. 3A,

(b) is an enlarged view of any one of the color selection electrode supports of at least two color selection electrode supports in the corner support method of FIG. 3B.

<Description of Symbols for Main Parts of Drawings>

100: panel 101: frame

102: shadow mask 103 to 106: color screen electrode support

107 to 110: frame support springs 116, 116a: stationary plate material

200, 200a, 201, 201a: base plate 202, 202a: mold hole

The color-selective electrode support structure of the color receiving tube according to an aspect of the present invention for achieving the above object, a panel having three or more stud pins on the inner surface, a frame for supporting the color-selective electrode portion, is mounted to the frame A color receiving tube having a plurality of frame support springs coupled to the stud pins to support the frame to the panel, comprising:

The base plate material of the same material as the said frame support spring is arrange | positioned between the said stud pin and the frame support spring in 2 or more places.

Preferably, the base plate is characterized in that thinner than the thickness of the frame support spring.

Optionally, characterized in that the thickness of the base plate material is formed thin in the range of 30% to 60% of the thickness of the frame support spring.

According to the color-selective electrode support structure of the color receiving tube according to the present invention, a panel having three or more stud pins on an inner surface, a frame supporting the color-selective electrode portion, and mounted to the frame and coupled to the stud pins to form the frame. In a color water tube having a plurality of frame support springs supported on a panel:

A base plate of the same material as the frame support spring is disposed between the frame and the frame support spring at two or more places.

Optionally, said base plate is stainless steel.

In this way, the symmetrical vibration transmitted from the disturbed panel to the stud pin during the operation of the color receiving tube is absorbed by the base plate interposed between the stud pin and the frame support spring or the frame and the frame support spring of the panel. It can be seen that the weakening causes the howling of the shadow mask to be suppressed, and thermal deformation does not occur during welding of the base plate having the same material as the frame support spring.

As a result, the mis-landing phenomenon of the electron beam caused by the magnetization of the vibration damping alloy material is healed, and the heat deformation caused by deformation and welding due to the decrease in strength and hardness during the wet test or the drop test is healed. There is an advantage that the convenience of handling images and processes is provided.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, the objects, other objects, features and advantages of the present invention will become more apparent from the following description with an embodiment according to the present invention in connection with the accompanying drawings shown for illustrative purposes.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the color screen electrode support structure of the color receiving tube according to the present invention.

In addition, regardless of the shadow mask method and the tension mask method, which is the color screening electrode, the color screening electrode support structure of the present invention can be applied, and each support structure is also applicable to the corner support method and the axial support method for the color screening electrode. The dichroic electrode supporting structure of the present invention can be applied.

In addition, in each figure used for description, the same component may be attached | subjected, and may show the same number, and the overlapping description may be abbreviate | omitted.

3 is a view illustrating two embodiments according to the present invention, Figure 3a is a first embodiment showing a state in which the shadow mask is supported by the axial support method of the panel, Figure 3b is a shadow mask of the panel Fig. 2 shows a second embodiment showing a state supported by the corner support method.

In the axial support type color selection electrode support structure according to the present embodiment, as shown in FIG. 3A, the frame 101 supporting the shadow mask 102 which is the color selection electrode has three or four color separation electrode support portions. It is supported by the panel 100 by 103-106.

That is, the frame is formed by matching the frame supporting springs 107 to 110 of the three or four color-selective electrode support parts 103 to 106 with the stud pins 111 to 114 formed on the inner wall axis of the panel 100. 101 is supported by the panel 100.

The same material as that of the frame support springs 107 and 110 is used to suppress the vibration of the shadow mask 102 in two or more symmetrical positions of the three or four color-selective electrode supports 103 to 106. The base plate 200, 201 which has a branch is provided, respectively.

FIG. 4A shows an enlarged view of one color-dividing electrode support 103 from two color-dividing electrode supports 103 and 106 having the base plates 200 and 201 symmetrically in the axial support method of FIG. 3A. Exploded perspective view.

As shown in FIG. 4A, the frame support spring 107 having the frame 101, the fixed plate member 116 and the mold hole 118 at one end is welded, and a mold hole having the same size as the frame support spring 107 ( A base plate 200 having a 202 and made of the same material as the frame support spring 107 to suppress the howling of the shadow mask 102 is interposed between the frame support spring 107 and the stud pin 111. After the shadow mask 102 is coupled to a predetermined position, the base plate 200 and the frame support spring 107 are welded to each other.

In addition, the color selection electrode support structure according to the second embodiment of the present invention according to the corner support method, as shown in Figure 3b and 4b, the fixing plate member 116a of the color selection electrode support (103a to 106a) in the same way as the axial support method The frame 101 is supported by the panel 100 by matching the frame support springs 107a to 110a welded to the stud pins 111a to 114a formed at the inner wall corners of the panel 100. Two symmetrical positions among the four color selection electrode supports 103a to 106a are made of the same material as the frame support springs 107a to 110a to suppress vibration of the shadow mask 102 as shown in FIGS. 3B and 4B. Base plate material 200a, 201a which has is provided, and is welded and joined with frame support spring 107a, 110a.

That is, the howling prevention base plate (200, 201), (200a, 201a) applied to the axial support method and the corner support method of the present invention are stud pins (111, 114) (111a, 114a) at two or more places of vertical or horizontal symmetry. And between the frame support springs 107, 110, 107a, 110a, or between the frame support springs 107, 110, 107a, 110a and the frame 101, or both.

Further, in the axial support method or the corner support method, the fixing plate members 116 and 116a interposed between the frame support springs 107 and 110 or 107a and 110a and the frame 101 to be welded are made of the same material as the frame support springs. It can also be used symmetrically. At this time, the base plate (200, 201) (200a, 201a) may be omitted. This is because the left and right symmetrical fixing plate members 116 and 116a are made of the same material as that of the frame support spring and thus have the same function as the base plate member.

In addition, the material of the base plate (200, 201) (200a, 201a) in the above is characterized in that made of the same stainless steel material as the frame support springs (107 to 110), (107a to 110a).

In addition, the thickness of the base plate (200, 201) (200a, 201a) is characterized in that it is as thin as possible frame support spring.

In the color-selective electrode supporting structure of the color receiving tube according to the present invention thus made, only the axial support according to the first embodiment will be described below, and the corner support according to the second embodiment is the same as the axial support. It will be omitted.

First, as the vibration of the sound wave coming out of the speaker (not shown in the drawing) is transmitted to the panel 100 in accordance with the start of the operation of the color receiver, the stud pins 111 to 114 of the panel 100 and the frame support springs. 107 to 110, in turn, to each of the fixing plate 116 and the frame 101 to vibrate the shadow mask 102.

The vibration of the shadow mask 102 causes the R, G, and B electron beams emitted from the electron gun not to reach the panel 100 through the original trajectory, that is, to reach the phosphor screen applied to the inner surface of the panel 100. Cause miss-landing.

With this, the raster pattern is inconsistent and the howling phenomenon with color bleeding appears.

The base plate (200, 201) used in the present invention is the external vibration from the speaker through the cabinet of the panel 100, stud pins (111 to 114), frame support springs (107 to 110), frame 101 Absorption is weakened in the process of being transmitted to the shadow mask 102 in order to prevent mis-landing.

That is, the damper for reducing the strength of vibration by placing the base plate (200, 201) of the present invention symmetrically between the stud pin (111, 114) and the frame support spring (107, 110) on the transmission path of the external vibration ( As a result, the vibration of the shadow mask 102, which is generated symmetrically, is suppressed and the howling phenomenon, which is color bleeding, is prevented.

In addition, every object has a natural frequency for each object. If the natural frequency and the external vibration of the object coincide with each other, the object causes resonance, resulting in a large amplitude.

Severe howling occurs when the shadow mask 102, which serves as the color discrimination function of the color receiver, and the vibration transmitted from the outside cause resonance.

This phenomenon occurs because the base plates 200 and 201 of the same material as the frame support springs 107 and 110, for example, stainless steel, not only weaken the strength of the external vibration but also change the natural frequency of such an object. The vibration of 102 is suppressed and the howling phenomenon, which is color bleeding, is prevented.

Here, the reason why the base plate (200, 201) of the same material as the frame support spring (107, 110) is used symmetrically or symmetrically, the spring material that is generally used is a thermal change in the cathode ray tube (CRT) And when the chemical effect is already verified as a material of the base plate (200, 201), there is no need to verify a separate thermal change, magnetic field change, chemical change. If the base plate 200, 201 made of a material different from the frame support spring is used, another natural frequency only of the material may exacerbate the howling phenomenon of the shadow mask 102 and may be considered by the designer when designing the howling response. Another natural frequency factor is to be provided. In addition, the frame support springs 107 and 110 which have already undergone such verification in the present invention because the use of the material of the base plates 200 and 201 in which the magnetic field characteristics inside the cathode ray tube are not verified may cause mis-landing of the electron beam. It is cured by constructing the base plate (200,201) using the same material as and symmetrically arranged in at least two places. In addition, since the base plates 200 and 201 that are identical to the frame support springs 107 and 110 can also sufficiently support the frame 101 and the shadow mask 102 by verifying mechanical strength, the problem of deformation can also be solved at the same time. have.

Here, the thickness of the base plate (200, 201) is characterized in that it is as thin as possible than the frame support spring (107, 110). The purpose is to suppress the color bleeding by minimizing the external vibration that is finally transmitted to the shadow mask 102 by attenuating the vibration in the base plate (200, 201) located on the vibration path to the vibration generated from the outside, but the base If the thickness of the plate (200, 201) is thicker than the material of the frame support spring, the rigidity of the base plate (200, 201) is too strong to absorb the external vibration to be pursued in the present invention, the vibration is frame support spring as it is And may cause the shadow mask 102 to shake. In addition, it is possible to change the degree of compression of the frame support springs (107 to 110) and to change the elastic strength to cause a redesign of the frame support spring.

Therefore, by making the thickness of the base plate (200, 201) in the present invention thinner than the thickness of the frame support spring (107 to 110), it is possible to simply install without changing the internal design of the existing product to the shadow mask 102 You can suppress blurring and thereby reduce color bleeding on the screen.

In the above, the thickness range of the base plate (200, 201) is most preferably thin in the range of 30% to 60% of the thickness of the frame support spring (107, 110).

This can effectively absorb external vibration when the thickness of the base plate (200, 201) is too thin, but can not sufficiently support the structure of the frame 101 and the shadow mask 102 cause deformation and firmly through Positioning the internal structure to be fixed, whereby the color purity of the screen can be significantly reduced. In addition, if the base plate (200, 201) is too thick, even if it can fully support the structure, it is to limit the thickness of the base plate (200, 201) because it can not sufficiently absorb external vibration.

In addition, in the present invention, the base plate (200, 201) disposed at two or more places is removed, and instead the frame plate (116) disposed between the frame (101) and the frame support springs (107, 110) is frame-supported. The same material as the springs 107 and 110 can also be arrange | positioned in two or more places.

That is, the vibration generated from the outside is transmitted to the shadow mask 102 through the panel 100, the stud pins 111 and 114, and the frame support springs 107 and 110, and functions as a color-selective electrode by the transmitted vibration. The shadow mask 102 that is present will tremble and cause color bleeding on the screen that we actually see. At this time, the base plate material, that is, the fixed plate material 116 of the same material as the frame support springs 107 and 110 on the vibration transmission path is disposed symmetrically to attenuate the vibration transmitted from the outside. As a result, vibration of the shadow mask 102 is suppressed so that howling that is color bleeding does not occur. Here, the thickness of the fixed plate member 116 disposed symmetrically in two or more places is the same as the thickness of the base plate members 200 and 201 described above.

On the other hand, as a comparative example, unlike the conventional technique, that is, a base plate formed of a vibration damping material such as a damping alloy between the stud pins of the panel and the frame support spring is disposed at one place to weaken external vibration, The invention is thinner than the frame support spring, it can be seen that the base plate made of the same material as the frame support spring symmetrically arranged in two or more places to suppress the shaking of the shadow mask and prevent color bleeding due to miss-landing.

As a result, according to the present invention, high-quality images can be obtained by absorbing external vibrations by suppressing the howling phenomenon by absorbing external vibration with a general metal material made of the same material as the frame support spring, that is, a stainless steel base plate. Handling inconvenience and cost increase can be minimized.

According to this application example, the vibration of the shadow mask due to external vibration in the color receiving tube and additional components are not increased when suppressing color bleeding, and deformation and welding due to the decrease in strength and hardness during the wet test or the drop test. The heat deformation caused by the treatment is cured so that the mis-landing phenomenon does not occur, which may lead to improved reliability of the product.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

It is clear from the above description that, according to the color-selective electrode supporting structure of the color receiving tube according to the present invention, by using a base plate made of the same material as the frame supporting spring, the material can be easily purchased and the material cost is low. The production cost of color water pipes can be lowered.

In addition, there is no effect of thermal deformation during welding or drop test or welding, and thus there is an effect that it can be conveniently handled and used without further verification.

Claims (5)

In a panel having three or more stud pins on the inner surface, a frame for supporting the color-selective electrode portion, a color receiving tube having a plurality of frame support springs attached to the frame and coupled to the stud pins to support the frame to the panel : A base plate material of the same material as the frame support spring is disposed between the stud pin and the frame support spring at two or more places; The base plate material, the color-selective electrode support structure of the color receiving tube, characterized in that formed thin in the range of 30% to 60% of the thickness of the frame support spring. delete delete The method of claim 1, The base plate is a color-selective electrode support structure of the color receiving tube, characterized in that the stainless steel. In a panel having three or more stud pins on the inner surface, a frame for supporting the color-selective electrode portion, a color receiving tube having a plurality of frame support springs attached to the frame and coupled to the stud pins to support the frame to the panel : A base plate material of the same material as the frame support spring is disposed between the frame and the frame support spring at two or more places; And the base plate is thinner than the thickness of the frame support spring.