KR830002244Y1 - Fluorescent surface manufacturing equipment of color CRT - Google Patents

Abstract

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Description

Fluorescent surface manufacturing equipment of color CRT

1 is a schematic view of a carrier of a color CRT manufacturing apparatus.

2 is an enlarged perspective view of a conventional head.

3 is a schematic view of a face plate panel.

4 is a side view showing a state in which a front panel is mounted on a conventional head.

Figure 5 is a side view showing a state equipped with a front panel on the head of the present invention.

* Explanation of symbols for main parts of the drawings

1 carrier frame 2 cap carrier

3: head 4: front panel

14: support 16: movable clamp

19: head board 27: arm

28: cap carrier rotation shaft 31: fixing guide

32: prop

The present invention relates to a device for producing a fluorescent surface for a color brown tube, and more particularly to a structure of a panel support.

As a method for producing a fluorescent surface of a color CRT, a phosphor slurry composed of phosphor powder, a photosensitive binder, a dispersant, and water is injected into a central portion of an inner surface of a tray-shaped front panel which is rotating upward. There is a method of diffusion coating toward the periphery of the panel.

The phosphor slurry coated on the inner surface of the panel is dried by infrared rays or warm air, and then exposed to ultraviolet rays in a predetermined pattern, and the portion irradiated with ultraviolet rays is photocured to adhere to the panel. Next, the fluorescent chamber layer is developed by, for example, mounting hot water to remove the unexposed portions. It is possible to produce a mosaic-shaped fluorescent surface having various colors by repeating the above steps for each phosphor having a different emission color.

In addition, prior to coating the phosphor slurry, first, the inner surface of the downward panel is cleaned by a common method using water, ammonium bifluoride, hydrofluoric acid, detergents, caustic substances, and the like to remove foreign substances.

The apparatus which produces the fluorescent surface of a color CRT by the above-mentioned method is described by the specialty public service 48-32935, the specialty public service 48-2022 etc.

This manufacturing apparatus is composed of a carrier frame 1, a cap carrier 2, and a head 3, as shown in FIG. 1, on a conveyor for hepatic blood movement. The front panel 4 is arranged in the center, and the phosphor slurry is injected into the center as described above.

2 is a detailed view of the conventional head 3. The head 3 is formed from a head organ 19, a panel support 14 and a clamp 16 provided thereon. 4 is a cross-sectional view of the state in which the panel 4 shown in FIG. 3 is disposed on the head 3. In FIG. 4, the head substrate 19 is supported by a plurality of arms 27 provided on the cap carrier rotation shaft 28, and two L-shaped panel supports 14 are installed on the head substrate 19. As shown in FIG. The panel 4 is provided so that both short side and one long side may contact each said arm.

The fourth clamp 16 is attached to the head substrate 19, and the other long side of the panel 4 is pushed and supported by the clamp. As this clamp means, a well-known method is used.

In the conventional head as described above, in the drying plant of the phosphor slurry applied to the inner surface of the panel, the outer surface of the panel is in contact with the L-shaped support 14, whereby the portion of the support 14 is in contact with the support 14. Compared with other panel outer surface parts that do not come in contact with the panel), if the temperature rises locally for the warming effect of the contact surface, it may cause abnormalities in the process of continuous exposure by ultraviolet rays or hot water, and thus it is impossible to obtain a uniform mosaic-shaped fluorescent surface. There is this. In addition, in the cleaning process of the inner surface of the panel by ammonium fluoride or hydrofluoric acid prior to the application of the phosphor slurry, the chemical liquid scattered is adhered to the outer surface of the panel, and the chemical agent is connected to the L-shaped support 14 and the outer surface of the panel. There is a defect that penetrates into the gap between the panel and the outer surface of the panel, and water is supplied to the gap between the head substrate 19 and the panel 4, which makes it difficult to remove the chemical liquid. It is an object of the present invention to provide that the above drawbacks of the conventional head are improved.

According to the present invention, there is provided a head structure in which a part of the panel outer surface in contact with the support 14 is brought into point contact from the surface contact and at the same time maintains a small area on the outer surface of the side wall of the panel.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Referring to FIG. 5, a support 32 is provided to support the outer surface of the panel and is in point contact with the outer surface of the panel. In addition, the panel position fixing guide 31 is provided so as to support the panel side wall outer surface instead of the conventional support 14 of FIG.

As easily understood in FIG. 5, in the present invention, since the panel outer surface is in point contact with the strut 32, the non-uniformity of the panel temperature in the drying process of the phosphor slurry can be ignored, and the clean process of the inner surface of the panel can be ignored. Even if the chemical liquid scattered at is attached to the outer surface of the panel, water is easily removed by supplying water to the gap between the head plate 19 and the panel 4, and undesirable infiltration of the outer surface of the panel does not occur.

Claims (1)

In the apparatus for disposing a front panel 4 on a head 3 attached to a carrier 1 and injecting a phosphor slurry into the front panel 4 to produce a fluorescent surface, the head 3 is a head substrate. (19), a plurality of guides (31) for determining the position of the front panel (4) provided on the head substrate (19), and a plurality of struts (32) which are in point contact with and supported by the bottom surface of the front panel (3). Fluorescent surface manufacturing apparatus of a color CRT tube.