KR20030022906A - Display device and Method of manufacturing the same - Google Patents

Abstract

PURPOSE: An image display device and a method for manufacturing the same are provided to achieve improved explosion proof characteristics, while reducing manufacturing costs by stacking a reinforcement glass through the simplified process. CONSTITUTION: An image display device comprises a panel(100) having a surface on which a reinforcement glass(300) is stacked. The reinforcement glass is bonded on the panel by using a polyethylene based resin layer interposed between the panel and the reinforcement glass. A method for manufacturing an image display device comprises a first step of stacking a polyethylene based resin on the surface of the panel so as to form a convex-concave form; a second step of stacking a reinforcement glass on the polyethylene based resin; a third step of vacuumizing the image display device where the reinforcement glass is stacked; and a fourth step of heating and cooling the image display device and removing vacuum from the image display device.

Description

Image display device and method of manufacturing the same

The present invention relates to an image display device and a method for manufacturing the same, and more particularly, to an image display device and a method for manufacturing the reinforcing glass is bonded to the outer surface of the panel.

In the image display apparatus, the color cathode ray tube is composed of a panel 1 having a fluorescent film 4 attached to its inner surface and a funnel 2 having a funnel-shaped neck portion 3 rearward as shown in FIG. The neck portion 3 has a built-in electron gun 6 for emitting electron beams 5 of R, G, and B colors for displaying phosphor screens, so that the electron beam 5 emitted from the electron gun 6 is provided. The image is displayed by being controlled by the magnetic field of the deflection yoke 7 attached to the outer circumference of the neck portion, color screening by the shadow mask 8 to impinge on a predetermined position on the screen of the fluorescent film 4 to emit phosphors. do.

In the color cathode ray tube, the panel 1 is made of glass, and the inside of the panel is high vacuum, so that the panel 1 undergoes a high-temperature furnace such as baking during the manufacturing process. Cracks occur. Therefore, there is a constant curvature at which the stress will escape or a thickness above a certain level is required. However, when the glass is thick, the transmittance is worsened, such as the efficiency of the brightness is lowered, the weight is increased and the price is increased.

Therefore, the above problem is solved by maintaining an appropriate thickness and attaching the reinforcing material 10 to the front surface thereof. In particular, in the case of planar imagers, there is little curvature, so the demand for reinforcement is greater. As the material for reinforcement, reinforcement glass or reinforcement film is generally used, but since reinforcement film is deteriorated due to the feeling of cloudiness, reinforcement glass is used for high quality imaging apparatus.

As a method of attaching such reinforcement glass to the panel surface, as shown in FIG. 2, the liquid crystal ultraviolet curing agent 20 including the liquid unreacted monomer, oligomer, and ultraviolet initiator is applied to the panel 1 and the reinforcement glass 10. After the injection into a certain thickness between) and irradiated with ultraviolet light of a metal halide (Metal halide) system having a wavelength region of 300nm to 400nm as the main emission region to form a resin layer by ultraviolet curing reaction to adhere the reinforcement glass to the panel Method was used.

However, the method of using the ultraviolet curing reaction has the following problems.

First, a process of making a space for filling the liquid UV curing agent (for example, using a device or a spacer for maintaining a constant thickness between the panel and the reinforcement glass), complex process such as liquid injection process, washing process, curing process This is necessary and the defective rate becomes high by such a multistep.

Second, since the ultraviolet curable resin functions to disperse the external impact of the color cathode ray tube together with the reinforcing glass, the thickness of the cured resin film should be thickened, but the light transmittance decreases as the film thickness increases, and crosslinking is not performed. If not, there may be a problem such as deterioration of the film properties and staining, there is a problem that the manufacturing cost increases.

Third, since the high viscosity liquid reactant is injected in the process of injecting the liquid reactant, the bubble generation rate is increased during the injection, and thus a long time is required for the defoaming process. On the other hand, there is a method of adding a surfactant in order to facilitate the regeneration operation to re-separate the panel and the reinforcement glass in accordance with the increase in defect rate due to the bubble, this method is a surfactant coating process is added, and some adhesion is reduced The tempered glass may drop out over time, and it is very disadvantageous in the reliability characteristics such as environmental testing and explosion proof of humidity and temperature, and when the surfactant is unevenly applied, unbonded parts are generated and defects are many. Is generated.

Fourth, since the main raw material of the ultraviolet curable resin is a skin irritant substance, it is very harmful to the human body and severe odor occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an image display device having excellent explosion-proof characteristics and excellent in manufacturing cost by laminating reinforcement glass by a simple process.

Another object of the present invention is to improve the working environment using materials that are not harmful to the human body.

1 is a schematic cross-sectional view of a typical cathode ray tube.

FIG. 2 is a cross-sectional view of portion A of FIG. 1.

3 is a cross-sectional view of a panel of the image display device according to the present invention.

4A to 4E are cross-sectional views of a manufacturing process of an image display device according to the present invention.

<Description of main parts of drawing>

1, 100: panel

10, 300: tempered glass

20, 200: adhesive material layer

In order to achieve the above object, the present invention provides an image display apparatus and a method of manufacturing the same, wherein a polyethylene-based resin layer is formed between the panel and the reinforcement glass as a material for adhering the reinforcement glass on the panel on which the image is displayed.

In general, thermoplastic resins are softened by heating to have excellent processability, which enables molding, and solidification upon cooling. They are resins that do not undergo chemical changes during the heating and cooling processes and thus bring about the same change by repeated heating. .

The present invention relates to bonding the reinforcement glass to the panel surface of the image display device by using a polyethylene-based resin of the thermoplastic resin in a simple method.

It is preferable to use polyethylene vinyl acetate produced from a high pressure polyethylene polymerization apparatus as the polyethylene resin. This is because polyethylene vinyl acetate has excellent flexibility and elasticity at room temperature, is melted at low temperature (melting point: 95 to 105 ° C), and is easily bonded, and has a tensile strength of 180 to 210 kg / cm ^{2, which} is an external impact of the image display device. This is because it has a strong function of mitigating. The polyethylene vinyl acetate is represented by the following structural formula.

The image display device includes a panel coated with a fluorescent film on an inner surface, a funnel having a funnel-shaped neck portion rearward, an electron gun mounted to the neck portion to emit an electron beam, a deflection yoke for deflecting the electron beam, and an electron beam deflected by the deflection yoke. It may be a cathode ray tube, or a flat color cathode ray tube, characterized in that it comprises a shadow mask for screening the color.

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

3 is a cross-sectional view of a panel portion of an image display apparatus according to the present invention, in which an image display apparatus in which a reinforcement glass 300 is laminated on a surface of the panel 100 on which an image is displayed is reinforced on the panel 100. The polyethylene-based resin layer 200 is formed between the panel and the reinforcement glass as a material for adhering the glass 300.

The polyethylene resin is preferably polyethylene vinyl acetate as described above.

The reinforcement glass and the polyethylene-based resin layer acts as a shock-absorbing function for the external impact of the image display device. As the thickness becomes thicker, the effect of explosion-proof increases, but when the polyethylene-based resin layer becomes thicker than 1 mm, the transparency is increased. The light transmission characteristics of the video display device are degraded. Therefore, the polyethylene resin layer preferably has a thickness of 0.1 to 1 mm. In addition, the thickness of the reinforcement glass is preferably 1mm to 4mm.

4A to 4E are cross-sectional views of a manufacturing process of an image display device according to the present invention, in which the polyethylene display 200 is laminated on the panel 100 surface to have an uneven shape (FIG. 4A). ; Stacking the reinforcement glass 300 on the polyethylene-based resin 200 (FIG. 4B); Vacuum-processing the image display apparatus in which the reinforcement glass is stacked (FIG. 4C); And removing the vacuum (FIG. 4E) after heating (FIG. 4D) and cooling the vacuum-processed image display device.

4A is a cross-sectional view of a polyethylene-based resin 200 laminated to have a concave-convex shape on the surface of the panel 100 of an image display device. It is to provide a passage through which As said polyethylene-type resin, polyethylene vinyl acetate is preferable.

4B is a cross-sectional view of the reinforcing glass 300 laminated on the polyethylene-based resin layer 200 laminated in the uneven form.

FIG. 4C relates to a vacuum processing step of the image display apparatus, in which an outer portion is sealed and a vacuum is formed between the reinforcement glass and the polyethylene resin and between the polyethylene resin and the panel using a vacuum pump. At this time, the vacuum treatment is preferably 29 torr (torr) or less.

4D illustrates a step of heating the vacuum processed image display device, and the heating is performed at 90 to 110 ° C. for about 10 to 30 minutes using an infrared heater, a halogen heater, a heating plate, or a hot air. By the heating, the polystyrene resin is softened, and the irregularities are deformed as shown in FIG. 4E by the air pressure from the outside and the compression effect by the vacuum between the reinforcing glass and the panel. Thereafter, the vacuum is removed to complete the image display apparatus.

Since the image display apparatus in which the reinforcement glass is laminated according to the above structure is bonded to the reinforcement glass in a state in which the polyethylene resin is softened, physical properties in the film are more stable than in the case of using a conventional UV curable resin.

In addition, the manufacturing process of the image display apparatus is simplified, and manufacturing cost is reduced, and defects caused by bubbles are reduced.

In addition, there is an advantage that the working environment is improved by using a material that is not harmful to the human body.

Claims (8)

An image display apparatus in which a reinforcement glass is laminated on a panel surface on which an image is displayed, wherein the polyethylene display layer is formed between the panel and the reinforcement glass as a material for adhering the reinforcement glass on the panel. The method of claim 1, The polyethylene resin is an image display device, characterized in that the polyethylene vinyl acetate. The method of claim 1, The thickness of the polyethylene-based resin layer is an image display device, characterized in that 0.1mm to 1mm. The method of claim 1, The thickness of the reinforcement glass is an image display device, characterized in that 1mm to 4mm. Stacking a polyethylene-based resin on the panel surface of the image display device to have an uneven shape; Laminating reinforcement glass on the polyethylene resin; Vacuum processing the image display apparatus on which the reinforcing glass is laminated; And And removing the vacuum after heating and cooling the vacuum processed image display device. The method of claim 5, The polyethylene resin is a manufacturing method of an image display device, characterized in that the polyethylene vinyl acetate. The method of claim 5, The polyethylene resin is a manufacturing method of an image display device, characterized in that laminated to a thickness of 0.1mm to 1mm. The method of claim 5, The thickness of the reinforcement glass is a manufacturing method of the image display device, characterized in that 1mm to 4mm.