KR100217136B1 - A fluorescent layer structure of a color crt - Google Patents

Abstract

In particular, the present invention relates to a fluorescent film structure of a color cathode ray tube, in particular, a fluorescent body fluid can be applied thickly on the inner surface of a panel, thereby reducing the occurrence of cracks and improving luminance compared with a fluorescent film of a single layered graphite film. The thickness of the graphite film is made uniform so that the white uniformity defect of the fluorescent screen can be prevented by increasing the thickness of the graphite film so that the fluorescent material solution can be thickly coated.

Description

Fluorescent film composition of color cathode ray tube

1 is a schematic view of an exposure apparatus for manufacturing a fluorescent screen;

FIG. 2 is a block diagram of a unit fluorescent pixel formed on the inner surface of the panel. FIG.

Figure 3 also shows the formation of a photoresist film on the inner surface of the panel.

FIG. 4 is a graphical representation of the formation of a graphite film on the photoresist at the inner surface of the panel.

FIG. 5 is a graph showing the formation of a single-layer graphite film on the inner surface of the panel. FIG.

FIG. 6 is a state in which the phosphor adhesion enhancer is applied on the inner surface of the panel. FIG.

FIG. 7 is a state in which the green phosphor is applied to the inner surface of the panel. FIG.

FIG. 8 is a state in which the green fluorescent film is formed at the position of the green phosphor on the inner surface of the panel. FIG.

FIG. 9 is a fluorescent pixel diagram of a graphite film of a single layer structure formed on the inner surface of the panel. FIG.

10 is a view showing a state of a crack of a fluorescent screen generated on the inner surface of a conventional panel.

FIG. 11 is a cross-sectional view showing a thickness difference between a central portion and a peripheral portion of a fluorescent screen when a fluorescent screen is formed on the inner surface of a conventional panel.

FIG. 12 is a view showing the shape of a spoke on a fluorescent screen at the inner surface of a conventional panel. FIG.

FIG. 13 is a multi-layered fluorescent pixel of the inner surface of a panel according to the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

101: Panel 102: Graphite membrane

103: red phosphor 104: blue phosphor

105: Green phosphor

The present invention relates to a fluorescent film formed on the inner surface of a panel of a color cathode ray tube, and more particularly, to a fluorescent film for preventing the occurrence of cracks and spots in a fluorescent film generated in manufacturing a fluorescent film, .

In order to form the red (R), blue (B) and green (G) fluorescent planes of the number of colors, the shadow mask 2 is arranged inside the frame 3 as shown in FIG. And the frame 3 is welded to the spring 4 again to mount the shadow mask 2 assembly on the stud pin 5 fixed to the panel 1 and placed on the furnace 6 .

A filter 8 for adjusting the amount of light with light emitted from the light source 9 and a lens 7 for designating the path of the light and passing through the hole of the shadow mask 2 and passing through the inner surface of the panel 1 Unit fluorescence pixel is formed.

When a photosensitive agent is applied on the inner surface of the panel 1 and exposed to the top of the exposure stage 6 to spray the photosensitive agent with a predetermined pressure of water, the photosensitive agent strip 12 (see FIG. 3) Is formed. When the graphite film 13 is formed on the photosensitive agent strip and dried to form the graphite film 13 of FIG. 4 and the photosensitive agent strip 12 is disassembled by using the drug after the graphite film 13 is formed, 1) only the graphite strip 14 is left on the inner surface. Next, to form a phosphor film, a phosphor adhesion enhancer 15 is applied as in FIG. 6, and a green phosphor film 17 is formed by applying a green phosphor material solution as shown in FIG. Thereafter, the green fluorescent pixel 17 is formed by drying and exposing and then washing with water of a certain pressure to wash the green fluorescent material.

The manufacturing method of the blue (B) and red (R) fluorescent pixels is the same as the manufacturing method of the green fluorescent pixel 17, Unit fluorescence pixel can be formed.

When a fluorescent pixel is manufactured as described above, a graphite film 14 having a single-layer structure is produced as in FIG. 5, and a phosphor film of FIG. 9 is similarly manufactured to have a single-layer structure.

In forming the fluorescent film in the coating process, which is a manufacturing process of the fluorescent film, the fluorescent film is formed by rotating the panel at a high speed after injection of the fluorescent material into the inner surface of the panel 1. As a problem occurring at this time, first, a crack of a fluorescent film, which is a defective manufacturing process of a fluorescent film in which a fluorescent substance is not partially applied to a portion between graphite bands, occurs as shown in FIG. 10 (a) There arises a problem that the luminance of the color cathode ray tube is lowered because the light emitting area is reduced.

Secondly, when the fluorescent material is injected into the inner surface of the panel 1 and the panel is rotated at a high speed, the fluorescent material easily flows to the periphery of the panel. As a result, the thickness of the central portion of the fluorescent film becomes thinner than the thickness of the fluorescent film As shown in FIG. 12, there is a difference in the thicknesses of red, green and blue fluorescent films at the central portion (B) of the effective surface of the screen, so that the luminescence of the thinned fluorescent film becomes less luminescent than the thick fluorescent film, (C) is generated and the white uniformity is deteriorated.

In view of the above, it is an object of the present invention to increase the thickness of a graphite film by forming a graphite film into a multi-layered structure, thereby enabling the phosphor film to be thickly coated, thereby preventing the occurrence of cracks and sparks in the phosphor film.

The present invention is described in detail below with reference to the accompanying drawings.

13, the graphite film 102 is formed in a multi-layered structure to increase the thickness of the red (103), blue (104), and green (105) phosphors applied to the inner surface of the panel (101) .

In order to form the graphite film of the present invention, a photoresist is coated on the inner surface of the panel 101 and exposed to light at an exposure area to spray the photoresist with a certain pressure of water to form the photoresist strip 12 as shown in FIG.

When the graphite film 13 is formed on the photosensitive agent strip and dried to form the graphite film 13 of FIG. 4 and the photosensitive agent strip 12 is disassembled by using the drug after the graphite film 13 is formed, 1) only the graphite strip 14 is left on the inner surface.

By repeating this process of producing the graphite film several times, the graphite film layer 102 having a multi-layered structure such as the thirteenth aspect can be formed. The method of forming the pixels of green, blue, and red phosphors is the same as that of the conventional method of forming a fluorescent film. When the fluorescent screen manufacturing method described above is performed, a fluorescent pixel having increased thickness of the fluorescent film can be formed.

According to the structure of the fluorescent surface of the graphite film of the multi-layered structure, first, when the phosphor is injected into the inner surface of the panel having the multi-layered graphite film for the manufacture of the fluorescent film and the panel is rotated at high speed, And a second step of rotating the panel at a high speed after injecting the fluorophore, the fluorophore flowing out to the periphery of the fluorescent film due to the multi-layered graphite film having a higher fluorophore So that the difference in thickness between the central portion and the peripheral portion of the fluorescent screen is reduced, so that the red, green, and blue fluorescent film thicknesses at the center portion can be made uniform.

As described above, the present invention reduces the occurrence of cracks and improves the luminance of a graphite film having a cracked single-layer structure compared to a graphite film, and uniformizes the thickness of the fluorescent film, thereby preventing the white uniformity defect of the fluorescent screen .

Claims (3)

A fluorescent film structure in which a graphite film is applied to the inner surface of a panel and a phosphor film of red, blue and green is formed between the graphite films. The fluorescent film structure comprises a plurality of graphite films so as to be thickly coated by increasing the thickness of the graphite film A fluorescent film composition of a color cathode ray tube characterized by. The fluorescent film structure of a color cathode-ray tube according to claim 1, wherein the graphite film is formed so that the width of the graphite film decreases toward the upper layer. The color cathode ray tube of claim 1, wherein the graphite films are formed with different widths.