JPS6280940A - Method for panel adherence - Google Patents

Abstract

PURPOSE:To increase work simplicity and labour effectiveness, by heating a plate heater and sucking out the air in a vacuum container through a nozzle, after successively placing a resin plate and an transparent panel on the display face of a display member and placing the plate heater and a deformable plate successively on the transparent panel face. CONSTITUTION:A resin plate and a CRT panel are successively placed on the face 4a constituting a CRT 4, and further a plate heater and a rubber plate are successively placed on the surface of the CRT panel. It may be also possible to form the CRT 4 through thermally depositing the face 4a and a funnel 4b together after making the CRT panel adhere to the CRT face 4a to let them be one body by heating the plate heater and sucking out the air in a vacuum container through a nozzle. However, if the CRT panel 5 is stuck on the face of the CRT whose face 4a and funnel 4b are sealingly stuck together, there is no possibility of heat decomposition of adhesive 6 during sealingly sticking the face 4a and the funnel 4b together. Therefore, this process is more desirable. As a result, work simplicity and labour effectiveness are increased and the cost is decreased.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for bonding a transparent panel to the display surface of a display member such as a CRT (cathode ray tube: including those with electrodes and the container itself without electrodes). This invention relates to a method for adhering panels.

(Prior Art) In CRT display devices and the like, a transparent anti-reflection treated CRT panel is used by adhering to the CRT in order to prevent reflection on the CRT face or to prevent glass from shattering when the CRT is damaged.

Conventionally, the CRT panel was bonded to the CRT face surface by placing a spacer approximately 2 mm thick around the CRT face surface, first placing the CRT panel, and then sealing the periphery with tape, leaving only a portion of the spacer. From the remaining portion, liquid resin is injected into the gap between the CRT face surface and the CRT panel, and after the resin is cured, the tape is removed.

(Problems to be Solved by the Invention) As described above, when a liquid resin is injected between a display member such as a CRT and a transparent CRT panel, etc. for bonding, the adhesive is in a liquid state, so preliminary preparation is required. The resin must be defoamed, and since it is a liquid resin, it is difficult to handle, and it takes time to harden the liquid resin, resulting in poor workability and efficiency and high costs.

(Means for Solving the Problems) In order to solve the above problems, the present invention sets a display member in a vacuum container, and sequentially places a plate-shaped resin and a transparent panel on the display surface of the display member. Further, after sequentially placing a plate-shaped heater and a flexible plate on the surface of the transparent panel, the plate-shaped heater is heated and vacuum is drawn from the nozzle of the vacuum container, so that the transparent panel is placed on the display surface of the display member. I tried to attach it to.

In particular, a CRT is set in a molded part of a vacuum container that has a molded part that follows the shape of a CRT, a resin plate and a transparent CRT panel are sequentially placed on the face of the CRT, and then a plate is placed on the surface of the CRT panel. Place the shaped heater and flexible plate in sequence,
The CRT panel was effectively bonded to the face surface of the CRT by evacuation while heating the plate heater.

(Function) By heating the plate-shaped heater and evacuating the vacuum container, the transparent panel and the molten plate-shaped adhesive are pressed against the display surface with equal pressure by a flexible plate such as a rubber plate, and the adhesive is bonded. The transparent panel is adhered to the display surface in a state where no air bubbles or the like are present in the agent.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a cross-sectional view of a 412-layer attachment device used in the present invention, and FIG. 2 is a cross-sectional view thereof.

The vacuum container (1) is equipped with a CRT on its inner wall.
A molding part (2) for molding the RT panel is formed,
An exhaust nozzle (3) is provided at the bottom of the CRT (4).The CRT (4) consists of a face (4a) and a seven-channel funnel (4b).
4b) are integrally formed by heat welding or the like.

Such CRT (4) (7)7. - In order to adhere the CRT panel (5) to the space (4a), the molded part (
2), set the CRT (4) in the
) A plate-shaped resin (6) is placed on the face (4a) surface.

This plate-shaped resin (8) is a thermoplastic resin, and is made of, for example, a copolymer of ethylene and vinyl acetate, ethylene vinyl acetate, or the like. The resin plate (6) has a refractive index close to the refractive index of glass (n=1.52), for example, n-1.45 to 1.85, and has a resin thickness of 0.55 to 1.85. It is preferable to use one with a diameter of 3 to 311 cm.

Here, an example of the relationship between the reflectance that occurs at the interface between glass and adhesive is shown in the [Table]. Note that the refractive index of glass is
．． It is 52.

[Table 1] As is clear from this [Table], it is preferable that the refractive index of the glass and the refractive index of the adhesive are similar.

Next, a CRT panel (5) is placed on this resin plate (6).

This CRT panel (5) is, for example, a transparent low-reflection plate that reduces surface reflection by having three layers of antireflection, each having a different refractive index, laminated on the surface of a transparent substrate. For example, the first layer is MgF2. with a refractive index of 1.30 to 1.45. The second layer is Al with a refractive index of 1.85 to 2.15.
A mixture of 2O3 and TiO, the third layer has a refractive index of t, eo
It is made of Al103 or CeF3 with ~t, ao, and the refractive index of the transparent substrate is 1.49 to 1.57. The refractive index of the film increases from the substrate side toward the air side. Furthermore, as the CRT panel (5), 2-
Use one with a thickness of 4 mm.

Furthermore, a flexible plate-shaped heater (7) is attached to the surface of the CRT panel (5)! A flexible rubber plate (8) covering the entire surface of the vacuum container (1) is placed on top of the plate-shaped heater (7) to seal the opening of the vacuum container (1).

Note that the periphery of the rubber plate (8) may be held down by a rubber presser (9), and the plate-shaped heater (7) may be adhered to the 5A surface of the rubber plate (8).

After doing this, connect the power supply (lO) to the plate heater (7).
The plate heater (7) generates heat by supplying power to the vacuum container (1).
) to about 100°C and evacuate through the nozzle (3) of the vacuum container (1). Then, the rubber plate (8
) is sucked into the vacuum container (1) at 1 atm, and presses the plate heater (7) and CRT panel (5) against the face (4a) of the CRT (4) with uniform pressure.

At this time, the plate-shaped resin (6) is melted by the heat generated by the plate-shaped heater (7), and then the power supply to the plate-shaped heater (7) is stopped to stop the heat generation. ) cures and adheres the CRT panel (5) to the face (4a) of the CRT (4).

After that, remove the rubber plate (8) and the plate heater (7),
Take out the CRT (4) from the vacuum container (1).

In addition, after placing a plate-shaped resin and a CRT panel in sequence a on the face (4a) constituting the CRT (4), and further placing a plate-shaped heater and a rubber plate in sequence a on the surface of the CRT panel, the plate-shaped heater is placed. By heating the CRT panel and drawing a vacuum from the nozzle of the vacuum container, the face of the CRT (4a
) and then heat weld the face (4a) and funnel (4b) to form the CRT (4).

However, if the CRT panel (5) is attached to the face surface of the CRT whose face (4a) and funnel (4b) have already been sealed,
This is preferable since there is no risk that the adhesive (6) will be deteriorated by the heat generated when sealing the face (4a) and the funnel (4b) together.

Further, in the embodiments, a CRT is shown as a display member, but examples of the display member include flat displays such as a liquid crystal display, a plasma display, an electroluminescent display, and an electrochromic display.

(Effects of the Invention) As explained above, according to the present invention, a display member such as a CRT is set in a vacuum container, a plate-shaped resin and a transparent panel are sequentially placed on the display surface of this display member, and After sequentially placing a plate heater and a flexible plate on the surface of the transparent panel,
The transparent panel is bonded to the display surface of the display member by heating the plate heater and drawing a vacuum from the nozzle of the vacuum container. Since the plate-shaped adhesive is used as the adhesive, it is easier to handle, and the resin Almost no curing time is required, and preparatory work using spacers and adhesive tapes is no longer necessary, improving workability and efficiency, and reducing costs.

In addition, since a flexible plate such as a rubber plate and a plate-shaped heater are used, the transparent panel can be evenly and reliably adhered to the display surface, and since it is sealed with the flexible plate, the heat transfer effect is high. It can be attached in a short time.

Furthermore, since the flexible plate is covered and vacuum is drawn, the air between the transparent panel and the front surface is completely degassed, improving quality.

In particular, even when bonding to the face of a CRT that has a complex three-dimensional shape, as in the example, the CRT panel can be bonded with even pressure over the entire face, overcoming the drawbacks of the conventional method. It will be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram for explaining one embodiment of the present invention;
FIG. 2 is a plan view thereof. In the drawings, (1) is a vacuum container, (4) is a CRT, and (4a) is a vacuum container.
) is yx-su, (4b) is 777 channel, (5) is CRT
The panel, (6) is a plate-shaped resin, and (7) is a plate-shaped heater. (8) is a rubber plate.

Claims (1)

[Claims] A display member of a display device is set in a vacuum container, a plate-shaped resin and a transparent panel are sequentially placed on the display surface of this display member, and then a plate-shaped heater and a flexible plate are sequentially placed on the surface of this transparent panel. 1. A method for adhering a panel, wherein the transparent panel is adhered to the surface of a display portion of a display member by heating a plate-shaped heater and drawing a vacuum from a nozzle of a vacuum container after the transparent panel is placed on the display member.