KR200147260Y1 - Panel of crt - Google Patents

Abstract

During the slurry process for forming the phosphor film on the panel, when the phosphor liquid remaining on the inner surface of the panel is discharged to the outside by centrifugal force generated by the head pin, the phosphor liquid flows around the stud pins to prevent a large defect from occurring in the process. In order to provide a panel structure of a cathode ray tube which can be made, the cathode ray tube panel comprising a front glass, opposing long sides and short sides, and stud pins inserted and fixed to the long and short sides; In order to prevent the phosphor solution from being applied around the stud pin in the process of discharging excess phosphor in the slurry process under the stud pin of the long and short sides, a predetermined length along the longitudinal direction of each side of the stud pins in the long and short sides Panel structure of a cathode ray tube, characterized in that the formation of a barrier.

Description

Panel structure for cathode ray tube

1 is a sectional view of the main portion showing a structure of a cathode ray tube panel according to a first embodiment of the present invention.

2 is a sectional view of the main portion showing a structure of a cathode ray tube panel according to a second embodiment of the present invention.

3 is a perspective view showing the structure of a conventional cathode ray tube panel.

* Explanation of symbols for main parts of the drawings

1 panel 3 front glass part

4, 5: long side portion 7: short side portion

11,11 ': Dull

[Industrial use]

The present invention relates to a panel structure of a cathode ray tube, and more particularly, when the phosphor liquid remaining after coating on an inner surface of a panel during a slurry process for forming a fluorescent film on a panel is discharged to the outside using a centrifugal force generated by a head pin. The present invention relates to a panel structure of a cathode ray tube capable of preventing a phosphor solution from flowing to a stud pin and its surroundings, thereby preventing a large defect from occurring in the process.

[Prior art]

In general, the front glass, that is, the fluorescent surface of the cathode ray tube panel is formed of a phosphor formed in a predetermined pattern, a BM film formed on the same surface as the phosphor to prevent color overlap between the phosphors when the phosphors emit light between the phosphors; It has a structure in which a metal back formed to enhance the potential for doubling the luminance of the fluorescent surface and to prevent the phenomenon that the fluorescent surface burns due to ion bombardment is formed. In the structure of the fluorescent surface as described above, the fluorescent film is formed through the following process after the BM film is formed. After completing the BM film forming process, a screening process is performed to apply phosphors between the BM films. The screening process is completed by applying RGB phosphors on the inner surface of the panel using three consecutive screen machines. The specific steps include (1) applying a green phosphor slurry to the inner surface of the panel, (2) heating the panel to dry the phosphor, (3) reassembling the mask and the panel, and (4) exposing the panel. Thereafter, the mask is separated to remove the unexposed phosphor on the panel using a dehydrogenated water spray. This process is the same for the remaining phosphors so that the completed phosphor constitutes thousands of lines or dots. In addition, the phosphor solution remaining after the coating on the inner surface of the panel is rotated by the head pin and is discharged to the outside by the centrifugal force thus generated. After completing the fluorescent film forming process, the aluminum film is deposited, and graphite is applied to the stud pins in order to achieve electrical connection between the aluminum film and the mask.

[Problem to solve]

As shown in FIG. 3, the panel 1 has a stud pin 9 inserted and formed at a predetermined height of the long side portion 5 and the short side portion 7 extending from the windshield 3. The stud pin 9 is supported by a mask frame (not shown) for supporting a shadow mask (not shown) for selecting the electron beam irradiated from the electron gun at regular intervals, and graphite is coated as described above. . However, as in the above-described process, when the remaining phosphor liquid is discharged to the outside in response to the centrifugal force generated by the head pin, if the phosphor liquid is discharged only to the four corners of the panel (1), a good result can be obtained. In addition, the fluorescent material is applied to the site where the stud pins 9 are formed to be discharged.

When the phosphor solution is applied to the stud pin 9, the phosphor solution is already coated with the graphite film formed to promote the electrical connection between the mask and the phosphor. There is a problem that a film defect occurs that may be lost. Therefore, an object of the present invention is to improve the structure of the conventional panel such that the phosphor solution is discharged to the outside by the centrifugal force generated by the head pin during the slurry process for the slurry process for forming a fluorescent film on the panel to the outside The present invention provides a panel structure of a cathode ray tube that can be scattered around a stud pin to prevent a large defect from occurring in a process.

[Means to solve the problem]

In order to realize the above object, the present invention is a cathode ray tube panel comprising a front glass portion, the long side portions and short sides facing each other, and a stud pin inserted and fixed to the long side, short side portion, during the slurry process In order to prevent the phosphor solution from being applied around the stud pin in the process of discharging the extra phosphor solution, a cathode having a predetermined length along the longitudinal direction of each side is formed in the lower stud pin of the long and short sides. Provide the panel structure of the tube.

The barrier portion provides a panel structure of a cathode ray tube, characterized in that the curvature is formed to protrude into the panel. It provides a panel structure of the cathode ray tube, characterized in that both ends of the barrier portion is bent in the stud pin direction.

The curvature of the barrier portion provides a panel structure of a cathode ray tube, characterized in that it is larger than the curvature formed in the connection portion between the front glass portion and each side portion.

The barrier provides a panel structure of a cathode ray tube, characterized in that it is formed of adhesive tape of a certain length and of a certain thickness.

[Action]

In this way, if a barrier is formed in the lower part of the stud pins of the panel and short sides, it can be discharged only to the edge portion of the phosphor liquid by centrifugal force, thereby preventing the phosphor from being applied around the stud pins.

EXAMPLE

Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are partial cross-sectional views showing the structure of the panel according to the first and second embodiments of the present invention.

As shown in FIG. 1, the structure of the cathode ray tube panel 2 according to the present invention is a panel front portion 3, a short side portion 7, and a long side portion to which a fluorescent film, a metal back, and the like are coated as usual. (5), four stud pins (9) are inserted and fixed in each of the long side portion (5) and the short side portion (7).

In the panel 2 having such a structure, as described above, the phosphor remaining in the slurry process is discharged to the outside by the centrifugal force by rotating the panel with a head pin, and the phosphor liquid is discharged to the long side portion 5 and the short side portion. If it is discharged only through the corner between the (7) does not cause a defect of the product, in general, the fluorescent liquid is also discharged to the long side portion 5 and the short side portion (7) at this time the fluorescence around the stud pin (9) Body fluid is applied and film defects occur when the graphite film is applied. Therefore, in order to solve such a problem, as shown, the stud 11 is formed under the stud pin 9 at the long and short sides 5 and 7 having the stud pin 9 formed thereon.

The barrier 11 will be described in more detail. When the curvature formed at the connection portion between the panel front part 3 and the long and short sides 5 and 7 is referred to as the first curvature part 13, the stud pin 9 is used. And a second curvature 15 projecting into the panel between the curvature 13 and the curvature 13 (FIG. 1).

Here, the curvature R 'of the second curvature portion is preferably smaller than the curvature R of the first curvature portion, which is for convenience of fabrication during pressing of the panel 2.

When the barrier 11 is formed below the stud pins of the panel long and short sides 5.7, as shown in FIG. 1, when the phosphor liquid is discharged to the outside by the centrifugal force, the phosphor is discharged only to each corner, so that the stud It is possible to prevent the phosphor from being applied around the pin.

In this case, the shape of the barrier is simply formed along the longitudinal direction of the long side portion 5 and the short side portion 7, and when both ends of the barrier 11 are formed by bending the stud pin 9 in the direction of fluorescence The body fluid can be more effectively prevented from being applied to the stud pin (9) site.

2 is a view illustrating one aspect according to the second embodiment of the present invention, and when the barrier 11 is formed by changing the structure of the panel 2 itself, due to the provision of a new device according to panel production, etc. It was devised to solve the problem of cost.

The formation position of the barrier 11 'according to this embodiment is the same as that of the first embodiment, but the barrier 11 is formed of a tape having a predetermined thickness having adhesive force.

Thus, by adhering the tape to the lower portion of the stud pin (9), when the discharge process of the phosphor solution is finished, the tape is removed again, so in the conventional apparatus for manufacturing a panel without any change in fluorescent material on the stud pin (9) The body fluid can be prevented from being applied.

[effect]

As described above, the present invention forms a dull turn under the stud pin when discharging the fluorescent agent remaining after the coating on the inner surface of the panel during the slurry process for forming the fluorescent film on the cathode ray tube to the outside using centrifugal force generated by the head pin. The present invention provides a panel of a cathode ray tube having an effect of preventing the phosphor solution from being applied around a stud pin and preventing a large defect from occurring in the process.

The present invention is not limited to the above-mentioned preferred embodiments, and may be variously changed under the basic concept of the invention shown in the following utility model registration claims.

Claims (4)

A panel for cathode ray tubes comprising a front glass portion 3, a long side portion 5 and a short side portion 7 facing each other, and stud pins 9 inserted into and fixed to the long side and short side portions 5 and 7 ( 1), the stud pins 9 of the long and short sides 5 and 7 in order to prevent the phosphor solution from being applied to the stud pin 9 and its surroundings during the discharge of excess phosphor liquid during the slurry process. A panel structure of a cathode ray tube, characterized in that formed in the lower portion of the length (11 or 11 ') of a certain length along the longitudinal direction of each side. The panel structure according to claim 1, wherein the barrier (11) is formed by forming a curvature (15) protruding into the panel. The curvature R 'of the barrier 11 is formed to be larger than the curvature R formed at the connection portion between the windshield 3 and the edges 5 and 7. Panel structure of cathode ray tube. The panel structure of a cathode ray tube according to claim 1, wherein said barrier (11 ') is formed of adhesive tape having a predetermined length and a predetermined thickness.