KR20020066687A - panel &wide width glass for color cathode ray tube and method bonding of panel & wide width glass - Google Patents

Abstract

PURPOSE: A panel and reinforcement glass and junction method therefor is provided to achieve improved focusing characteristics and contrast, while shortening time taken for vacuum process. CONSTITUTION: A reinforcement glass(1) is bonded onto a CRT panel(2), and a thermoplastic resin layer(11) is formed between the CRT panel and the reinforcement glass. A surface active agent layer(13) containing a coloring pigment and dye is formed between the CRT panel and the thermoplastic resin layer formed at the reinforcement glass, or between the reinforcement glass and the thermoplastic resin layer formed at the CRT panel. A junction method for panel and reinforcement glass comprises the steps of depositing a surface active agent at the outer surface of panel or the inner surface of reinforcement glass; stacking a thermoplastic resin layer onto the reinforcement glass or panel; bonding the surface active agent layer and thermoplastic resin layer in such a manner that two layers are opposed each other; and performing vacuum and press processes.

Description

Panel and wide width glass for color cathode ray tube and method bonding of panel & wide width glass

The present invention relates to a panel and a reinforcing glass for a color cathode ray tube, in particular, by laminating a panel using a polyvinyl butyral sheet and a surfactant containing a coloring pigment when bonding the reinforcement glass, thereby improving the 1K harmony by improving the poor color It secures the characteristics such as focus, improves the desired high-quality body color for the color of the full visible area, improves the contrast by freely controlling the transmittance, and air between the glass and polyvinyl butyral sheet during the bonding process. The present invention relates to an image display device of a cathode ray tube suitable for shortening a vacuum process time by easy removal.

In the conventional color flat cathode ray tube, as shown in FIG. 1, the panel 2 on which the reinforcement glass 1 having explosion-proof property is fixed on the front surface and the funnel 3 and the funnel fused to the front surface of the panel 2 are installed. 3) Red, green, and blue phosphors are coated on the inner surface of the panel (2) and the electron gun (5) for emitting three electron beams (4) enclosed in the panel (2). There is a fluorescent film 6 that emits each color by an electron beam, and the panel 2 is supported by a tensioned shadow mask 7 having an infinite number of pore-shaped holes maintained at a constant distance from the inner surface of the panel 2. It is comprised by the rail 8 shown.

The cathode ray tube having the above-described structure controls the transmittance by coloring the panel 2 or the reinforcement glass 1 in order to improve the contrast characteristics, but according to the manufacturing process or technical difficulties, the increase in the part price and the appropriate transmittance There is a problem such as difficult to obtain.

The image display device emits three colors of red, green, and blue phosphors as an accelerating current from an electron gun to produce white color. At this time, green and blue color are similar in color but red color is different so that red color is emitted to red color. It is easy to be overloaded.

In addition, when the color coordinates do not match due to the coating property, the screen design, the transmittance of the panel / tempered glass, and the luminous efficiency of each color of the phosphor, an overload of the current ratio for a specific color occurs. Overloaded phosphors are generally red phosphors. Due to such an overload, a large amount of current is applied to a specific phosphor, resulting in poor focus and color purity, and particularly in the case of the phosphor, causing deterioration and lifetime of the phosphor.

In the environmental sector, the overload on the R side of the gun shortens the life of components such as electron guns and cathodes.

In addition, the object color, that is, the body color, of the front part of the conventional image display device is generally measured using La * b * coordinates. The transmittance and color of the panel, the color and reflectance of the PH portion of the fluorescent surface, and the graphite band are measured. Depending on the size of the, it is hard to change in the desired direction.

However, the color of the front part is more color when the image device is turned off according to the development of more improved product in the future, such as the demand for various colors of body color due to the expansion of consumer's awareness of color and demand for design. A change is required. However, in the conventional imaging apparatus, it is difficult to easily change the color of the panel or graphite, which makes it difficult to cope with this.

On the other hand, the panel 2 made of glass in the image display device is used to prevent inhalation or firecrackers into the interior due to impact from the outside or high vacuum inside, and high temperature such as baking during the manufacturing process. In order to eliminate the occurrence of cracks through the furnace, a certain level of thickness is required, and the resistance to stress can be safer if the thickness is thick and the constant curvature of the stress is released. have.

However, when the thickness of the glass constituting the panel 2 becomes thicker, the transmittance becomes worse, and thus the efficiency of luminance, etc. in the imaging apparatus becomes worse, and the depth of the imaging apparatus becomes larger and heavier and the price increases. Therefore, the thickness of the panel 2 is properly maintained, and then bonded to the front surface of the reinforcement glass 1 to secure safety against breakage during consumer use.

In particular, in the case of a planar imager, since there is almost no curvature, the stress cannot naturally escape, so the demand for reinforcement is increased. Generally, the planar imager uses reinforcement glass 1 or a film. Due to the feeling of dullness, deterioration of quality occurs, reinforcement glass is used for high quality imaging device.

The bonding of the reinforcing glass 1 is bonded to the panel 2 and the reinforcing glass through a lamination process. In general, in the lamination process, as shown in FIG. 2A, an ultraviolet curable resin 10 such as acrylate and polyester, which is cured using UV (ultraviolet) satisfying optical and explosion-proof properties, is used.

However, when combining the reinforcement glass 1 and the panel 2 through the ultraviolet curing reaction using the resin, there is a problem that the process is complicated and the defect rate is high, the material is expensive and harmful to the human body.

In order to solve the problems caused by the conventional UV curable resin as shown in FIG. When the temperature reaches a predetermined temperature, the polyvinyl butyral (PVB) 11 and the surfactant 12 are laminated with excellent optical properties and shock-absorbing properties among the plasticized thermoplastic resins.

Polyvinyl butyral (PVB) sheet has high transmittance and glass-like refractive index, so there is no double phase due to external light transmission of the color cathode ray tube, and the glass transition temperature is low, so it is easy to bond and soft at low temperatures on the sheet. And the impact strength is large, so it has a strong function to mitigate the external impact of the color cathode ray tube.

In this case, in order to enable the regeneration of the cathode ray tube and the reinforcement glass including the panels strongly attached to each other, a surfactant 12 capable of controlling the adhesive force of the polyvinyl butyral sheet is applied to the outer surface of the panel or the inner surface of the reinforcement glass. .

The adhesion of the polyvinyl butyral sheet requires vacuum, heating and pressurization processes. In the vacuum process, air between the glass and the polyvinyl butyral sheet must be removed. A branch is formed.

However, if the height is low, it is difficult to remove the air due to the adhesion of the reinforcement glass, and if the height is increased, the polyvinyl butyral sheet becomes transparent because there is no light scattering when the pattern is removed. The process also becomes difficult. Therefore, there is a need for a method for easily removing air between the glass and the polyvinyl butyral sheet during the bonding process.

The present invention is to solve the above-described problems, by laminating by applying a surfactant containing a coloring pigment when reinforcing glass bonding using a polyvinyl butyral sheet, thereby ensuring a 1K non-harmonious focus to improve the poor color It is possible to improve the characteristics of the back, the desired high-quality body color can be implemented for the color of the full visible region, and the control of the transmittance can be freely changed, the contrast is improved. In addition, an object of the present invention is to provide an image display apparatus of a cathode ray tube suitable for having a feature such as to reduce the time of a vacuum process by easily removing air between a glass and a polyvinyl butyral sheet during a bonding process.

1 is a structural diagram of a color cathode ray tube

Figure 2a is a cross-sectional view of the bonding state of the conventional panel and the reinforcement glass

Figure 2b is a different state of bonding with Figure 2a

3 is a cross-sectional view of the bonding state of the panel and the reinforcement glass of the present invention

4 is a molecular structure of the dye

5 is a shape diagram of a thermoplastic resin sheet

6 is a view of the sheet different from FIG.

Figure 7a is spectrum when applying a pigment of violet color

Figure 7b is a spectrum when applying a pigment of rust color

Figure 7c is a spectrum when applying a pigment of red color

Figure 7d is a spectrum when applying a pigment of blue color

Figure 7e is a spectrum when applying a pigment of black color

8 is a spectrum according to the concentration of the pigment

9 is a state diagram showing a change in sea color according to the pigment color

Fig. 10A is a diagram showing spot size variation, which is a focus characteristic at 114 kHz load on a red phosphor;

Fig. 10B is a diagram illustrating spot size variation, which is a focus characteristic when a 195 Hz load is applied to a red phosphor;

Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Tempered glass 2 Panel 11 thermoplastic resin

13: surfactant containing color pigment

3A and 3B of the present invention for achieving the above object, in the reinforcing glass is laminated on the cathode ray tube panel, between the panel 2 and the reinforcing glass (1) thermoplastic resin layer ( 11) is formed, the coloring pigment between the thermoplastic resin layer 11 formed on the reinforcement glass 1 and the panel 2 or between the thermoplastic resin layer 11 and the reinforcement glass 2 formed on the panel 2 or It consists of an image display device for color cathode ray tubes, characterized in that a surfactant layer (13) containing dye is formed.

The present invention described above is a sheet-shaped sheet having a thickness of 0.2 to 3 mm between the outer surface of the reinforcing glass 1 and the panel 2 having a thickness of 1 to 5 mm. in the buffer characteristic of the impact it is laminated excellent polyvinyl butyral (PVB) structure, polyvinyl decomposed in a plasticizer of the LAL sheet "OH ^-" tile panels and because of the hydrogen bonding between the "silanol nolsan" of the reinforcing glass polyvinyl The butyral sheet and the panel and the reinforcement glass are strongly adhered to each other, but the surfactant is applied to the outer surface of the panel on which the polyvinyl butyral sheet layer is formed or the inner surface of the reinforcement glass in order to enable regeneration.

Properly adjusting the concentration and application amount of the surfactant can remove the polyvinyl butyral sheet adhered to the outer surface of the panel or the inner surface of the reinforcement glass, thereby regenerating cathode ray tubes such as panels and reinforcement glass. At this time, the present invention is used to include a pigment or dye showing the color of the visible region in the surfactant.

In the case of the conventional UV curable resin, since the resin is injected in a liquid state, the pigment may not be included in a surfactant or the like due to defects such as stains and modification of the pigment due to ultraviolet rays.

On the other hand, the adhesion of the polyvinyl butyral sheet requires a process of vacuum, heating, and pressurization. In the vacuum process, air between the glass and the polyvinyl butyral sheet needs to be removed. The pattern which has a height is formed. However, if the height is low, it is difficult to remove the air due to the adhesion of the reinforcement glass, and if the height is increased, the polyvinyl butyral sheet becomes transparent because there is no light scattering when the pattern is removed. The process also becomes difficult.

However, in the present invention, by laminating a surfactant layer containing a pigment between the polyvinyl butyral sheet layer is formed, by providing a roughness to the glass in close contact with the polyvinyl butyral sheet, when the vacuum is applied from the outside, glass and poly The air between the vinyl butyral sheets can be easily removed, thereby shortening the time of the bonding process.

Examples of the method of applying color to the surfactant include inorganic pigments, organic pigments, and dyes. The dyes of FIG. 4 are excellent in coloration and dispersibility, but are poor in light resistance and heat resistance, and therefore, are within 100 ° C. It is preferable to use a pigment because there is a fear of denaturation and the hiding power of color is not good.

There are many kinds of pigments. Organic pigments are insoluble in solvents such as water or oil, and are organic colorants used in the state dispersed in the medium. And many of them have excellent light resistance, but are inferior to inorganic pigments.

Inorganic pigments are pigments made of inorganic compounds, also known as mineral pigments. They are generally stable compared to organic pigments and do not change color, have good light resistance and heat resistance, but are opaque and insufficient in concentration.

In this case, when the pigment is applied to the surfactant, treatment should be performed to prevent deposition and to secure dispersibility. Wetting treatment is required to bury a liquid surfactant around the solid phase by preventing deposition. Separating pigments agglomerated in a solid state by milling or the like by particles ensures dispersibility between particles due to the surfactant component.

The components of the surfactant include cationic and cationic surfactants such as K ⁺ , Na ⁺ , Mg ²⁺ , Ca ²⁺ , dimethyl (polyethylene oxide) siloxane copolymers [Dimethyl (Polyethylene Oxide) Siloxane Copolymer], lauryl oxygenate Lauryl acid soda, sodium lauryl sulfate, sodium lauryl sulfonate, nonylphenol, sodium octadecyl sulfate, enhexyl benzene sulfonate (n- Hexyl benzene sulfonate) and the like can be used. The cation reacts with the OH group to interfere with the ligation mechanism.

When the pigment is applied to the surfactant as described above, the spectrum characteristic varies depending on the color of the pigment in the wavelength range of 380 to 780 nm.

7A to 7E show the characteristics of the color spectrum when applying pigments of various colors to the surfactant, and the brightness and contrast characteristics depend on the characteristics of the spectrum. Figure 8 shows the change in the spectral characteristics according to the pigment concentration when the pigment is applied to the surfactant, the concentration is proportional to the thickness of the surfactant, by adjusting the desired color and spectral characteristics according to the control of the concentration and thickness as the same pigment You can adjust the brightness and contrast.

Thus, the desired body color can be adjusted as the surfactant to which the colored pigment is applied, and FIG. 9 shows the change of the body color according to the color of the pigment. The table below shows the La * b * coordinates for measuring the body color of an imaging device made of a mixture of colored pigments and surfactants.

SPL Violet Green Blue White Red R + B L 16.76 16.245 14.525 22.585 15.41 17.76 a * 4.78 -7.05 -0.865 -0.385 4.88 -2.525 b * -8.895 -3.57 -3.07 -6.55 1.525 -6.085

※ The La * b * coordinate system is the color space for measuring the object color, and L is the reflected luminance, which shows achromatic color toward the center. a * and b * are color coordinates based on the tristimulus value of the fully reflector which becomes the standard.

By adjusting the body color, it is possible to secure a balance of the discordant 1K ratio by improving color for a desired color. For example, when 1K current is overloaded in an red phosphor, a resin applied with a red pigment such as iron oxide series is used to improve red color, thereby preventing overload on red by adjusting the 1K ratio.

By securing a balance of 1K ratio, the characteristics of Focus and Color Puret, which were overloaded first, are improved. This can be confirmed that the focus characteristic is improved by reducing the spot size when reducing the 1K current which is generally overloaded with red.

In addition, it is possible to prevent overloading of the phosphor and deterioration of lifetime. In particular, red phosphors using a rare earth metal as a core have the largest change in color coordinates due to burning and overcurrent. In addition, the life of parts can be improved by reducing overload on R side of gun and cathodic stability.

10A and 10B show a change in the spot size where the focus becomes better as the 1K current decreases, and it can be seen that the focus is improved by reducing the current overloaded on the phosphor. And as can be seen from the spectral characteristics, the transmittance of the unwanted color portion is lowered, thereby improving the contrast.

As described above, the present invention can reduce contrast with conventional methods of adjusting transmittance by coloring a panel or reinforcing glass, and allow free adjustment of transmittance and improve contrast without deterioration of optical characteristics such as luminance by using spectral characteristics. In addition, by using at least one or more pigments that produce color when applying a coloring pigment, a body color of a color desired by a consumer may be realized. At this time, the degree of color can be adjusted as the amount and thickness of the pigment.

In addition, since a large amount of pigments may deteriorate the luminance property too much, it is necessary to coordinate with an appropriate body color. In this case, the panel uses a clear light having a transmittance of 90%, and accordingly, by adjusting the spectrum by adjusting the concentration and thickness, it is possible to improve the high quality body color and contrast characteristics without decreasing the brightness, except that the transmittance of the colored resin Although there is a decrease in luminance due to the decrease, the luminance can be equal or higher by increasing the G load current and improving the phosphor emission efficiency due to the 1K balance improvement. In addition, by improving the color of the lack of color, it is possible to secure the 1K ratio and the color.

In adhering the panel and the reinforcement glass using the surfactant containing the pigment, as shown in Fig. 3a and 3b, a surfactant comprising a pigment on the outer surface of the panel 2 of the cathode ray tube or the inner surface of the reinforcement glass (1) (13) is applied and prepared. Then, on the reinforcing glass 1 or the panel 2, a sheet of thermoplastic resin 11 made of polyvinyl butyral having irregularities as shown in FIGS. 5 and 6 is laminated. Subsequently, the surfactant 13 and the thermoplastic resin 11 prepared and prepared as described above are welded to each other and bonded as shown in FIGS. 3A and 3B.

It is preferable that the density | concentration of the coloring pigment contained in the said surfactant is 0.0001 to 0.5%, and the thickness of a surfactant layer shall be 0.005-1.0 mm.

The present invention manufactured as described above is a laminated state of a panel, a resin sheet, and a reinforcement glass as shown in Figure 1 is a vacuum band (9) made of silicon material having excellent heat resistance and softness in order to prevent bubbles caused by the air layer between the laminate After covering the outer part in the sealed or put the assembly of the cathode ray tube in the vacuum chamber, using a vacuum pump to remove the air between the reinforcing glass and the resin layer, between the resin layer and the panel to form a vacuum of 50torr or less.

At this time, the surface unevenness of the thermoplastic resin sheet 11 is a passage through which air can escape, so that air is removed between the layers.

When the air layer is removed and heated at 120 to 140 ° C. for 10 to 30 minutes using an infrared heater or a heating oven, the sheet of thermoplastic resin 11 is softened, and at this time, an effect of about 1 atmosphere or atmospheric pressure due to atmospheric pressure is used. By the effect of compressing at a pressure of 1 to 10 atm using a clave), irregularities of the sheet occur and a transparent sheet is formed. If the vacuum is removed after cooling in this state, the reinforcement base of the flat color cathode ray tube is completed.

The finished substrate prepared as described above can be easily recycled and recycled because the reinforcement glass and polyvinyl butyral sheet can be easily removed from the panel when electrical or chemical defects or process defects occur. .

The following is described according to the embodiment.

In the lamination process, the surface of the panel is sprayed using an appropriate concentration of a surfactant composed of dimethyl (methyl) and methyl (polyethylene oxide) siloxane copolymer [Methyl (Polyethylene Oxide) Siloxane Copolymer] containing 0.015% of red organic pigment. After coating on the above, the panel on which the surfactant is formed and the reinforcement glass are bonded using polybutyral (PVB) resin. In this case, the pigment is uniformly dispersed in the surfactant by a wetting agent treatment after milling, and the thickness of the polyvinyl butyral resin is 0.76 mm.

Subsequently, after sealing the vacuum band, air is removed between the tempered glass and the polyvinyl butyral resin layer and the resin layer and the panel using a vacuum pump to form a vacuum of 10 torr or less. After heating the temperature of the polyvinyl butyral resin itself to 120 ° C. for about 10 minutes using an infrared heater, the upper layer of the tempered glass is uniformly pressurized with a pneumatic cylinder, and the vacuum is removed after cooling.

Table 1 shows the characteristics of the tube using the manufactured as described above.

1 K rain Brightness (500㎂ / FL) Contrast200 Lux R / G R / B Conventional product 1 1.42 1.34 28.8 18.7 Conventional product 2 1.41 1.32 28.8 18.7 Example 1.15 (20%) 1.12 (16%) 29.4 (102.3%) 20.8 (111%)

※ The prior art 1 is a case where resin which is an ultraviolet curable resin is used, and the prior art 2 is a case where a polyvinyl butyral sheet is used and surfactant is not applied.

In the embodiment to which the present invention is applied as shown in Table 1, the ratio of R / G and R / B, which is a standard of incongruity of 1K ratio to R, G, and B, was improved by 20% and 16%, respectively. The ideal ratio of R / G and R / is "1".

In addition, the current which was overloaded on the R side was dispersed to the G-side having high luminous luminance, and thus the luminance increased by 2.3% compared to the conventional example, and the contrast was increased by 11% by controlling the transmittance of the resin by applying the pigment.

In addition, the vacuum process time for removing the air between the glass and the polyvinyl butyral sheet at the time of adhesive bonding of the polyvinyl butyral sheet was reduced from 5 minutes to 3 minutes by 40%.

As described above, the present invention applies a surfactant including a coloring pigment during the reinforcing glass bonding process using a polyvinyl butyral sheet to secure a 1K contrast by improving color color inferior to a conventional image display device, thereby achieving focus and the like. It is possible to improve the characteristics of, to achieve the desired high-quality body color for the color of the entire visible light region, and to control the transmittance can be freely changed, the contrast is improved, and glass and polyvinyl buty during the bonding process The removal of air between the LAL sheets is facilitated and the effect of shortening the time of the vacuum process is obtained.

Claims (7)

In the case where the reinforcement glass is laminated on the cathode ray tube panel, a thermoplastic resin layer is formed between the panel and the reinforcement glass, and the coloring pigment is formed between the thermoplastic resin layer formed on the reinforcement glass and the panel or between the thermoplastic resin layer formed on the panel and the reinforcement glass. Or a panel for color cathode ray tube and reinforcing glass, characterized in that the surfactant layer comprising a dye is formed. The method of claim 1, The colored pigment or dye is a color cathode ray tube panel and reinforcing glass, characterized in that the color in the entire visible region. The method of claim 1, The colored pigment is a color cathode ray tube panel and reinforcing glass, characterized in that at least one of purple, red, green, blue, yellow, white. The method according to claim 1 or 3, A panel for color cathode ray tubes and reinforcing glass, wherein the concentration of the colored pigment is 0.0001 to 0.5%. The method of claim 1, The thickness of surfactant containing a coloring pigment is 0.001-1.0 mm, The color cathode ray tube panel and reinforcement glass characterized by the above-mentioned. The method of claim 1, A panel for color cathode ray tubes and reinforcing glass, wherein the thermoplastic resin is polyvinyl butyral. In forming the reinforcement glass on the panel outer surface of the flat color cathode ray tube, Applying and providing a surfactant containing a colored pigment or dye on the outer surface of the panel or the inner surface of the reinforcing glass; laminating and preparing a thermoplastic resin on the reinforcing glass or panel to be bonded according to the above; A method of joining a panel for color cathode ray tubes and reinforcing glass, the method comprising: bonding and bonding a surfactant layer and a thermoplastic resin layer containing a colored pigment or dye, followed by vacuum forming, heating, and pressing.