KR900004258B1 - Color display tube - Google Patents

Abstract

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Description

Color Water Center

1 to 3 are explanatory views of the embodiments of the present invention, in which FIGS. 1A and b are cross-sectional views and plan views, respectively, showing the configuration of main parts of the color water pipes.

2A and 2B are a sectional view and a plan view, respectively, showing an enlarged configuration of the main part.

3 is an enlarged plan view of an essential part showing another embodiment according to the present invention.

4 is a perspective view showing a portion of a conventional color water pipe.

5, 6, and 7 are schematic plan views, main part enlarged plan views, and main part enlarged cross-sectional views showing main parts of FIG.

8 is an explanatory diagram of a panel forming method.

9 is a stress distribution diagram of the glass surface of the color water pipe.

* Explanation of symbols for main parts of the drawings

1: face part 2: skirt part

6: fluorescent surface 7: shadow mask

9: elastic support 10: panel pin

30: panel 32: frame

33: flat portion 36: mounting surface

40: pedestal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color receiving tube, and more particularly, to a color receiving tube having an improved structure of attachment of panel pins for supporting a shadow mask. Common rectangular shadow mask type color water pipes are specified in, for example, Japanese Patent Laid-Open No. 61-267238.

That is, as shown in FIG. 4, the substantially rectangular panel 3 provided with the skirt part 2 at the circumferential edge of the face part 1, and the conical panel 4 with the same shape of the truncated part are provided. There is an outer container 5 integrally bonded. On the inner surface of the face portion 1, a stripe or dot-shaped three-color phosphor layer or a phosphor surface 6 made of the three-color phosphor layer and the light absorbing layer is formed. A rectangular shadow mask 7 is mounted on the inner side of the phosphor surface 6 opposite thereto.

자형의 탄성지지체(9)를 고정시키고 있다. 이 탄성 지지체(9)를 대향하는 패널(3)의 스커트부(2)의 코너 내측면에 고착된 패널핀(10)에 걸어 맞춤으로써 패널(3) 내에 새도우마스크 전체를 장착하는 것이 있다.The shadow mask 7 is attached to its peripheral edge frame 8 and has a cross section approximately at the outer surface of the corner of the frame 8.

The magnetic elastic support 9 is fixed. The whole shadow mask is mounted in the panel 3 by engaging this elastic support body 9 to the panel pin 10 fixed to the corner inner surface of the skirt part 2 of the panel 3 which opposes.

However, the above-described fluorescent surface 6 is coated with a phosphor slurry made of a phosphor and a photosensitive resin on the inner surface of the face of the panel 3 and dried to expose the shadow mask 7 in the film. The dry film is formed by firing a pattern corresponding to the electron beam passing hole 12 of the shadow mask 7 and then developing it.

This is repeated for the three-color phosphor and is formed through the same process for the light absorbing layer.

Therefore, the shadow mask 7 includes this fluorescent surface forming process and is repeatedly attached and detached several times until it is finally assembled to the color water pipe. On the other hand, in order to make the color water pipe easy to color and display a good color water pipe, not only the arrangement of the three-color phosphor layer formed according to the above-described method is correct, but also the phosphor surface in which the three-color phosphor layer is correctly arranged ( For 6), the electron beam emitted from the electron layer 13 must be correctly entered through the electron beam through hole 12 of the shadow mask 7. As shown in FIG.

In order to do so, the support structure of the shadow mask 7 composed of the elastic support 9 and the panel pin 10 is applied to the thermal and mechanical parts of the shadow mask 7 during the mounting and dismounting of the shadow mask 7 several times. It must have sufficient strength to withstand the impact and must support the shadow mask 7 with good reproducibility for mounting and dismounting several times.

The advantage of this type of color receiver is that, in order to support a large rectangular mask frame in four corners, the influence of deformation on the mask frame is small compared to the method of supporting at the center of the side. That is, the disturbance of beam landing can be suppressed small.

Second, there is less variation in beam landing due to vibration for the same reason.

Third, the so-called long term purity drift phenomenon seen when 30 minutes or more have elapsed since the start of operation can be corrected without using a bimetal that has been conventionally used. However, among the above-described support structures of the shadow mask 7, the panel pins 10, in particular, the filtering portion 15 having a tapered side to engage with the elastic support 9, as shown in Figs. And a stud portion 16 provided on the panel 3 is formed in a tubular shape with a jaw formed integrally.

For this reason, when this is provided in the corner of the skirt part 2 of the large curvature panel 3, the embedding depth in a direction which crosses a tube axis direction and a right angle | corner will change. Therefore, compared with the normal color water pipe which provided this panel pin in the center part of each side of the skirt part 2, the adhesive strength is low.

In particular, in the FS type (brand name) color water pipe which has a rectangular main display screen, the curvature of a panel side wall part is larger, and the adhesive strength of a panel pin becomes low, and stud precision is also weakened.

In addition, since the color water pipe becomes large and the weight of the shadow mask 7 is greatly increased, such color water pipes may be damaged at the periphery of the panel pins 10 due to thermal and mechanical shocks applied during the manufacturing process. . In addition, in order to support the shadow mask 7 with good reproducibility, the panel pin 10 must be attached to the panel 3 with high precision.

The attachment accuracy is the attachment accuracy in the observation direction, the attachment accuracy in the direction perpendicular to the tube axis, the inclination with respect to the inner surface of the skirt portion 2, and the pins of the panel pins 10 and 10 facing each other as shown in FIG. The interval l is related.

The method of supporting the shadow mask 7 with the elastic support 9 of the four corner portions is that the spring pressure of the four elastic supports 9 is balanced in the vicinity of the tube axis, so that the shadow mask 7 and the panel 3 The relative position is determined.

In general, the support structure of the above-described shadow mask 7 crosses the plane of the engaging portion of the elastic support 9 at right angles with respect to the pin shaft 17 of the panel pin 10 as shown in FIGS. 6 and 7. It is designed so that it can be engaged so that it may be properly engaged by pressing and contacting at least three points at predetermined positions of the engaging portion 15.

Therefore, if the mounting position of the panel pin 10 or the inclination of the panel 10 is out of alignment, it cannot be properly engaged as described above, so that the shadow mask 7 cannot be mounted or detached with good reproducibility, and color adjustment is easy and good color can be obtained. It does not become the color water pipe which displays an image. In addition, the panel pin 10 in which the position or the inclination are shifted in this way, the depth of the stud around the entire periphery changes, so that the attachment strength is further lowered than normal.

In addition, the panel 3 includes a bottom 19 having a concave portion corresponding to the outer surface of the face portion 1 and an outer plate 20 having an annular convex portion corresponding to the skirt portion 2, as shown in FIG. It is formed by assembling and supplying a predetermined amount of molten glass to the center portion of the concave portion of the bottom 19 and then advancing and pressing the plunger 21.

However, in this forming method, the plunger 21 and the outer plate 20 are pulled out when the panel 3 is still soft in that order, so that the formed skirt portion 2 is represented by a dashed line and a dashed line. 3) to fall inward or outward. When the panel pin 10 is provided so that the pin spacing l becomes constant with respect to such a panel 3, the case where the skirt part 2 falls inward is deep, and when it falls outward, it becomes shallow.

In particular, when the studs of the panel pin 10 are deep, the swelling of the glass around the pin 10 increases, so when the shadow mask 7 is mounted or detached, the elastic support 9 contacts the swelled portion and is wound. The scratches are liable to be scratched due to thermal shock applied during the color water pipe manufacturing process. In addition, when the skirt portion 2 falls outward and the stud becomes shallow, the adhesive strength thereof is low, and thus scratches are easily caused by thermal and mechanical shocks as described above.

In addition, as shown in FIG. 4, since the panel pins 10 are attached to the corners of the panel skirt 2, phosphors or the like are attached to the panel pins 10 during the formation of the fluorescent surface. There is a problem that the positional deviation is caused and the phosphor is dropped during the subsequent color water pipe removal process or after completion of the color water pipe and adheres to the electrode of the electron gun 13 to weaken the withstand voltage characteristic.

That is, the fluorescent surface 6 of the color receiving tube rotates the panel 3 to inject the phosphor slurry into the center of the rotating panel 3, and spreads the phosphor slurry along the inner surface of the face portion 1 using centrifugal force and the skirt portion. The phosphor slurry remaining after reaching (2) is produced by the method in which the skirt portion 2 is recovered.

At this time, the remaining phosphor slurry gathers at the corner of the panel 3 which is subjected to the greatest centrifugal force and is discharged out of the panel 3 at this corner. In particular, in the FS-type color water pipe, which has a rectangular main display screen recently, the corners of the skirt portion 2 are sharp, so that the phosphor slurry concentrates on one diagonal. The phosphor slurry attached to the panel pin 10 causes it to worsen the reproducibility of the mounting of the shadow mask 7 and then to drop off, thereby lowering the breakdown voltage characteristic of the color water pipe.

As described above, the panel pin is attached to the corner of the skirt of the substantially rectangular panel, and the collar pin is attached to the inner side of the panel pin by hooking the elastic support to the panel pin. It becomes uneven over the entire circumference of the pin. Therefore, compared with the normal color water pipe provided in the center part of each side of a skirt part, the adhesive strength is low and especially when the adhesive precision falls, the adhesive strength falls further. In addition to this, if the position and inclination of the panel pin are shifted or the skirt portion falls outward by press molding, the adhesive strength gradually decreases.

Therefore, when the color water pipe becomes large and the weight of the shadow mask increases, the load applied to the panel pin increases, and there is a problem that a flaw is generated around the panel pin due to thermal and mechanical shock applied during the color water pipe manufacturing process.

In addition, when the skirt part falls down during press forming, the swelling of the glass around the panel pin increases, so when the shadow mask is attached or detached, the elastic support contacts the swelling part and a wound occurs. There is a problem that a scratch occurs due to the applied thermal shock.

Even if the scratches and intakes of the panel are minute, they are subjected to atmospheric pressure after exhaust of the color water pipe manufacturing process, so as to generate strain stress as shown in FIG. There is this.

In addition, in the panel with panel pins attached to the corners of the skirt, the remaining phosphor slurry is discharged from the corners of the skirt when forming the fluorescent surface. Therefore, it is attached to the panel pins, which causes poor reproducibility of the device of the shadow mask. There is a problem of weakening the withstand voltage characteristic of the correlation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the panel pins are attached to the corners of the skirt portion of the panel, which is substantially rectangular, to improve the adhesion strength and the adhesion accuracy of the panel pins in the color water pipe where the shadow mask is mounted on the panel pins. The present invention also aims to prevent phosphors from adhering to the panel pins when forming the phosphor surface.

There is a panel consisting of a face part that forms a fluorescent surface and a face part installed with panel pins in each corner of a rectangle extending in a rectangular shape on the peripheral edge thereof, and in a color water pipe where a shadow mask is mounted on the panel pin. It is a color water pipe installed by installing panel pins on the inner surface of the inner curvature, which is smaller than the curvature of the outer surface.

Further, the inner surface of the corner portion of the skirt portion includes an extension of the base of the panel pins, and the attachment surface for planting the panel pins has a curvature smaller or flatter than the curvature of the outer surface of the corner portions.

As described above, if the curvature of the inner corner of the skirt portion of the panel is reduced, that is, the radius of curvature is increased to approximate flatness, and the panel pins are attached to the inner wall of the corner, the phosphor slurry discharged from the corner of the skirt portion during the formation of the fluorescent surface By expanding the surface area of the flowing corners, the slurry attached to the panel pins can be changed to a flow which diffuses or separates from the pins, thereby preventing the adhesion of the phosphor to the panel pins.

In addition, since the panel pin can be studd to a constant depth over its entire circumference, the adhesion strength can be improved, and thus the attachment accuracy can be improved. Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 shows the configuration of main parts of the color water pipe of one embodiment of the present invention.

This color water pipe is the same as the conventional color water pipe except for the support structure of the shadow mask. This color receiving tube has a substantially rectangular glass panel 30 having a rectangular skirt portion 2 installed at the periphery of the face portion 1 and a tricolor phosphor layer formed on the inner surface of the face portion 1. A substantially rectangular shadow mask 7 is provided inside the fluorescent surface 6.

자형인 탄성지지체(9)를 패널(30)의 스커트부(2)의 코너에 부착된 패널핀(10)에 걸어맞춤으로써 전술한 패널(30)에 장착된다.The shadow mask 7 comprises a mask body 31 having a plurality of electron beam through holes 12 of a predetermined shape, and a frame 32 having an " L " The cross section provided in the corner part of the outer wall surface of this frame 32 is substantially

The shape of the elastic support 9 is fitted to the panel 30 described above by engaging the panel pin 10 attached to the corner of the skirt portion 2 of the panel 30.

By the way, in this color water pipe, the corner of the skirt part 2 of the panel 30 contains a panel pin, and the plane part which makes the actual curvature of the inner surface of a skirt part smaller than the curvature of an outer surface in a plane perpendicular to a tube axis. There is 33. In the present embodiment, the planar portion 33 is substantially triangular in cross section over two sides adjacent to the skirt portion 2 forming the screen of each corner.

Opening direction of the panel 30 at the boundary between the face portion 1 and the skirt portion 2 with respect to the corner inner surface 34 of the inclined skirt portion 2 as indicated by broken lines in FIG. Extending in parallel with the panel axis 35 (corresponding to the tube axis), and the open end portion of the panel protrudes toward the center of the panel 30 rather than the corner inner surface 34 of the skirt portion 2. Do it. In addition, the panel pin attaching surface 36 is formed so as to intersect at right angles to the pin axis of the panel pin 10 when the panel pin 10 is correctly attached.

In addition, the panel pin 10 can be attached by melting the predetermined position of the above-mentioned flat part 33 with a gas burner or a high frequency heating etc. and stud | melting the melted part.

However, as described above, a flat portion 33 having an attachment surface 36 that intersects at right angles with the pin axis of the panel pin 10 is provided at the corner of the skirt portion 2 of the panel 30 and the attachment surface ( Attaching the panel pin 10 to the panel 36 may change the flow of the remaining phosphor slurry discharged from the corner of the skirt 2 when the fluorescent surface is formed, thereby preventing the adhesion of the phosphor to the panel pin 10.

That is, the surface area of the attaching surface 36 of FIG. 1 (b) is wider than before, so that the phosphor slurry flows away from the fin 10, and a ridge line is formed between the attaching surface 36 and the panel edge. It is possible to prevent the adhesion of the phosphor to the pin 10 by intensively flowing the phosphor sleefer portion.

Therefore, the fall of the reproducibility of shadow mask mounting based on fluorescent substance attachment can be prevented.

In this way, the panel pin 10 can be easily buried at the contact angle θ, which is not only a constant depth over the entire circumference, but also the maximum narration strength. Therefore, the adhesive strength of the panel pin 10 can be improved more than before, and when the flat part 33 is provided in this way, the deformation | transformation of the corner of the skirt part 2 at the time of panel shaping can be made small.

In addition, since the panel pin 10 can be studed on the basis of an arbitrarily selected position of the planar portion 33, the adhesion accuracy thereof is improved. Therefore, the reproducibility is good for mounting or detaching the shadow mask and displays a good color image. It can be a color water pipe. Moreover, the depth of embedding of the panel pin 10 is stabilized by the improvement of the attachment precision, and the flaw which arose because of the low attachment precision of the conventional panel pin can be prevented. In addition, by providing the flat portion 33, the thickness of the corner portion of the panel can be thickened, and the deformation of the panel with respect to atmospheric pressure can be reinforced, thereby making the color water pipe with high strength against explosion. Next, some modifications will be described.

3 is an adjacent side surface forming a channel 37a between the attachment surface 36 and the skirt portion 2 inner surface in addition to the panel pin attachment surface 36 at the corners of the skirt portion 2 of the panel 30. This is an example in which a pedestal 40 having 37 is formed. When the pedestal 40 is formed in such a shape, it is possible to effectively limit the flow path of the remaining phosphor slurry discharged from the corner, especially when forming the fluorescent surface, which makes it difficult to attach the phosphor to the panel pin 10 almost. There is an advantage.

Also, as shown in FIG. 1 (a), the panel pins 10 are formed by planting the center pins of the panel pins 10 at right angles to the tube axis 35 to improve stud precision and strength. have.

With the above configuration, it is possible to improve the adhesion strength and adhesion accuracy of the panel pins, and to prevent the scratches of the panel and the adhesion of the phosphor to the panel pins, so that the reproducibility of the shadow mask can be improved. It can be set as the color receiving tube which displays a good color image.

Claims (5)

A panel having a face portion forming a fluorescent surface on the inner surface, a skirt portion formed at a predetermined curvature on each inner and outer surface of the rectangular corner portion extending in a rectangular shape at its periphery, and panel pins provided on the inner surface of the corner portion of the skirt portion; A color water pipe comprising at least a shadow mask mounted to panel pins facing the fluorescent surface, wherein the actual curvature of the inner surface of the corner of the skirt portion is smaller than the curvature of the outer surface of the corner portion. The color water pipe according to claim 1, wherein the inner surface of the corner portion includes a pedestal having an attachment surface of the panel pins having a curvature smaller or flatter than the outer surface of the corner portion, and the panel pins are planted on the attachment surface of the pedestal. . 3. The color water pipe according to claim 2, wherein the attachment surface of the pedestal is substantially perpendicular to the diagonal axis of the panel. 4. The color water pipe according to claim 3, wherein the panel pins are planted and installed in the pedestal so as to protrude in a direction parallel to the diagonal axis of the panel. 3. The color water pipe according to claim 2, wherein the side surface of the pedestal forms a channel and restricts the flow path of the phosphor when the phosphor surface is formed.

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