JPH07326289A - Application method of film onto panel surface of cathode-ray tube - Google Patents

Abstract

PURPOSE:To provide an application method of film onto a panel surface of a cathode-ray tube in which bubbles as causes of glittering in an effective image surface can be pushed out completely. CONSTITUTION:In applying a film F onto a surface of a panel P of a cathode- ray tube 1 using UV-curing binding agent, an application roller 2 is used first to apply the film F tightly to the panel P from the inner side at one end part toward the one end part. The application roller 2 is then moved to the other end part of the panel P to apply the film F tightly onto the whole surface of the panel P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a film to the surface of a cathode ray tube panel applicable to, for example, a computer display device.

[0002]

2. Description of the Related Art In recent years, a cathode ray tube has been devised in which a film is attached to the surface of the panel in order to protect the surface of the panel and prevent reflection and static electricity. FIG. 4 shows a conventional film sticking method in such a cathode ray tube. As shown in FIG. 4A, in this method, first, the film 11 to be stuck is sandwiched between the roller 13 of the sticking roller 12 and the conveying roller 14,
As shown in B, the sticking roller 12 is lowered to press the film 11 against one end of the surface of the panel 15. In this case, an ultraviolet curable resin, for example, is applied as an adhesive to the entire surface of the panel 15. Then, as shown in FIG. 4C, the roller 13 is rolled in this state to move the sticking roller 12 to the other end of the surface of the panel 15, thereby bringing the film 11 into close contact with the surface of the panel 15. Then, by irradiating the entire surface of the film 11 with ultraviolet rays, the surface of the panel 15 and the film 1 are exposed.
1 to cure the resin between 1 and the panel 15 of the film 11.
Adhere to the surface of.

[0003]

However, the conventional method has the following problems. That is, as shown in FIG. 4B, when the roller 13 is rolled from one end of the surface of the panel 15, bubbles in the adhesive resin generated near the start end are pushed out to the end of the surface of the panel 15. May remain in the resin during the adhesion process. Then, such bubbles cause "glare" on the effective screen. Therefore, conventionally, there has been a demand for a method of attaching a film that does not leave bubbles in the resin of the adhesive.

The present invention has been made in consideration of such problems of the conventional example, and is a method of sticking a film on a panel surface of a cathode ray tube capable of completely pushing out bubbles causing glare in an effective screen. The purpose is to provide.

[0005]

The present invention is described in, for example, FIG.
As shown in FIG. 3, when the film F is attached to the surface of the panel P of the cathode ray tube 1 using an adhesive, the film F is adhered from the inside of one end of this panel P toward the one end thereof, and then The film F is closely attached to the other end of the panel P.

In this case, the film F can be adhered from the vicinity of the outside of the effective screen area 8 of the panel P toward one end of the panel P.

It is also possible to use an adhesive containing an ultraviolet curable resin.

[0008]

In the present invention thus constructed, when the film F is attached to the surface of the panel P of the cathode ray tube 1 using the adhesive, first, the inside of one end of the panel P is moved to the one end. By bringing the film F into close contact with each other, the bubbles in the adhesive resin are pushed out to the one end side of the panel P. Then, after that, the film F is brought into close contact with the other end of the panel P, whereby air bubbles in the resin of the adhesive are not left in the effective screen area 8 of the panel P, and the film F and the surface of the panel P are Is adhered.

In this case, by adhering the film F from the vicinity of the outside of the effective screen area 8 of the panel P toward one end of the panel P, the generation of bubbles in the effective screen area 8 and the generation of ground marks of rollers and the like. Is prevented.

Further, by using an adhesive containing a UV-curable resin, bubbles are less likely to remain in the resin of the adhesive, and the refractive index can be made equal to that of the glass of the panel P. This can eliminate the influence of light refraction due to the adhesive after curing.

[0011]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 2 shows a cathode ray tube 1 to which the present invention is applied and a sticking roller 2 for carrying out the present invention. In the method of this embodiment, the film F is attached to the surface of the panel P of the cathode ray tube 1 after assembly. As shown in FIG. 2, in this embodiment, the tube body 3 of the cathode ray tube 1 is fixed with the surface of the panel P facing upward.

A sticking roller 2 for sticking the film F to the surface of the panel P is provided above the tube body 3. The sticking roller 2 has a sticking head 6. The sticking head 6 is equipped with a roller 4 made of, for example, neoprene rubber, and a transport roller 5 for sandwiching and holding the film F between the roller 4. A pressure cylinder 7 is attached to the sticking head 6 for pressing the roller 4 to apply a constant pressure on the film F to carry out the sticking. Further, the sticking roller 2 moves up and down and X _A or X in the figure.
_It is attached to a mechanism (not shown) for moving in the _B direction.

Next, an embodiment of a method for attaching a film to a panel surface of a cathode ray tube according to the present invention will be described with reference to FIGS. 1 and 2.

First, the tube body 3 of the cathode ray tube 1 which has been assembled.
Is fixed with the panel P facing upward, and an ultraviolet curable adhesive (for example, an acrylate radical polymerization ultraviolet curable resin) is applied to the surface of the panel P. Then, as shown in FIG. 2, the film F is sandwiched between the roller 4 and the transport roller 5, and the attaching roller 2 is arranged above one end (starting end) of the panel P.

Next, as shown in FIG. 1A, the sticking roller 2 is lowered to press the film F against the surface of the panel P. In this case, as shown in FIG. 3, unlike the case of the conventional method, the area inside the starting end of the panel P is near the outside of the effective screen area 8 (for example, in the case of a 25-inch cathode ray tube, the effective screen is not displayed). The attaching roller 2 is lowered to a position 2 to 3 mm apart from the area 8.

Then, as shown in FIG. 1B, in this state, the sticking roller 2 is moved toward the starting end side, that is, in the direction of the arrow X _A by a predetermined distance (for example, about 5 mm for a 25-inch cathode ray tube).
The film F is moved to the start end side of the panel P.
Make sure that it adheres so that it does not come off. In this case, as shown in FIG. 3, the pasting roller 2 is stopped slightly before the end on the start end side of the panel. Then, by this, bubbles in the adhesive resin near the start end are pushed out to the outside. still,
The end portion of the film F is fixed by a film chuck (not shown).

Further, as shown in FIG. 1C, the pasting roller 2 is moved along the surface of the panel P toward the end end, that is, the arrow X.
Move in the _B direction. The pressure applied from the roller 4 to the surface of the panel P is 3 to 5 kg with respect to the entire roller 4.
It is preferable to apply a moderate load. However, the pressure can be changed according to the type and size of the tubular body 3.

After that, the film F is removed from the attaching roller 2 and the adhesive is cured by irradiating it with ultraviolet rays to bond the film F to the surface of the panel P.

As described above, according to the method of this embodiment, the film F is pressed against the surface of the panel P by the sticking roller 2 inside the starting end of the surface of the panel P, and in this state, the film F is moved toward the starting end. After moving the sticking roller 2 to bring the film F into close contact, the sticking roller 2
By moving the film F to the end end side and adhering the film F to the entire surface of the panel P, the bubbles in the adhesive near the start end can be pushed out to the start end side, and as a result, in the effective screen area 8 The bubbles that cause glare can be completely pushed out of the resin of the adhesive.

The present invention is not limited to the above-described embodiment, but various modifications can be made. For example, the position at which the application roller is lowered can be changed according to the type and size of the tubular body.

Further, the means for bringing the film into close contact with the surface of the panel is not limited to rollers, and various means can be used. However, it is most effective to use the roller having the structure used in the above-mentioned embodiment.

Further, the adhesive for adhering the film to the surface of the panel is not limited to the ultraviolet curable adhesive, and other electron beam curable adhesives may be used, and the electron beam curable adhesive may be used. Not an adhesive (thermosetting resin,
Adhesives, etc.) can also be used.

[0024]

As described above, according to the present invention, when the film is attached to the surface of the panel of the cathode ray tube using the adhesive, the film is adhered from the inside of one end of the panel toward the one end. After that, the film is brought into close contact with the other end of the panel, so bubbles in the adhesive resin near the one end of the panel can be completely pushed out, and as a result, glare in the effective screen area is prevented. can do.

In this case, by making the film adhere to the one end of the panel from the vicinity of the outside of the effective screen area of the panel, it is possible to further prevent glare in the effective screen.

Furthermore, by using an ultraviolet-curable adhesive as the adhesive, it is possible to completely prevent glare in the effective screen area and prevent optical deterioration due to the adhesive.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a film sticking method according to the present invention in the order of steps.

FIG. 2 is a front view showing a cathode ray tube to which the present invention is applied and a sticking roller for carrying out the present invention.

FIG. 3 is an explanatory diagram showing a lowered position and a stopped position of a roller on a panel in the present embodiment.

FIG. 4 is an explanatory view showing a conventional film sticking method in the order of steps.

[Explanation of symbols]

 1 cathode ray tube 2 sticking roller 3 tube body 4 roller 5 transport roller 6 sticking head 7 pressure cylinder 8 effective screen area F film P panel

Claims (3)

[Claims] 1. When a film is attached to the surface of a panel of a cathode ray tube by using an adhesive, the film is adhered from the inside of one end of the panel toward the one end, and then the other end of the panel. A method for attaching a film to a panel surface of a cathode ray tube, characterized in that the film is adhered to the panel. 2. The method of attaching a film to a panel surface of a cathode ray tube according to claim 1, wherein the film is adhered from near the outside of the effective screen area of the panel toward one end of the panel. 3. The method of attaching a film to a panel surface of a cathode ray tube according to claim 1, wherein the adhesive contains an ultraviolet curable resin.