JPH10177843A - Manufacture cathode ray tube and its manufacturing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the manufacturing method and manufacturing equipment of a cathode ray tube by shortening ultraviolet ray irradiation time for curing an adhesive layer and enhancing productivity. SOLUTION: An adhesive layer 18 made of an ultraviolet ray curing resin is applied to a panel glass 14 of a CRT 10, a functional film 20 is stuck thereon, ultraviolet ray is irradiated with an ultraviolet ray irradiation device 2 to cure the curing resin in the adhesive layer 18. The ultraviolet ray irradiation device 2 has a light source lamp 4 and a reflecting plate 6, and the reflecting plate 6 has a main reflecting part 6A facing the panel glass 14, a sub-reflecting part 6B curved from the periphery of the main reflecting part to the panel glass 14 side, and an extended part 6C extended to the vicinity of the peripheral part of the panel glass 14. By the extended part 6C, the ultraviolet ray is reflected to the adhesive layer 18 side, the ultraviolet ray distribution in the peripheral part having a thicker film thickness is intensified compared with the central part of the adhesive layer 18, the adhesive layer 18 is cured at almost uniform curing time as a whole, and curing time is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cathode ray tube (hereinafter, referred to as a cathode ray tube).
The present invention relates to a method and apparatus for manufacturing a CRT in which a functional film is attached to a panel glass surface of a CRT.

[0002]

2. Description of the Related Art Heretofore, there has been provided a CRT in which a light transmissive functional film for antistatic, antireflection, and antifouling is adhered to the surface of a panel glass (for example, Japanese Patent Application Laid-Open No. H8-208). -83566). FIG.
FIG. 3 is a side view showing an example of a CRT 10 provided with such a functional film, and FIGS. 3 and 4 are side views illustrating a step of attaching a functional film to the CRT 10. As shown in FIG. 2, the CRT 10 is configured by joining a funnel glass 12 and a panel glass 14 with a frit glass part 16, and functions on the surface of the panel glass 14 via an adhesive layer 18 made of an ultraviolet curable resin. Film 20
Is pasted.

In order to attach the functional film 20 to the panel glass 14 in such a CRT 10, as shown in FIG. 3, first, an adhesive layer 18 made of an ultraviolet curable resin in accordance with the bending rate of the panel glass 14 is applied to the panel glass 14. Glass 1
4 is applied to the surface. After that, the functional film 20 is placed on the adhesive layer 18, and the rubber roller 22 is rolled over the adhesive layer 18 and pressed thereon to attach the functional film 20, and then, as shown in FIG. Ultraviolet rays are irradiated by 24 to cure the ultraviolet curing resin of the adhesive layer 18. The ultraviolet irradiation device 24 has a light source lamp 26 for generating ultraviolet light, and a reflector 28 disposed on the rear surface of the light source lamp 26. As the light source lamp 26, a general mercury lamp, metal halide lamp, xenon lamp, chemical lamp, or the like is used. The reflection plate 28 is for effectively using the ultraviolet rays emitted from the light source lamp 26. In such an ultraviolet irradiation device 24, the ultraviolet light is applied to the adhesive layer 18 on the panel glass surface with a substantially uniform illuminance distribution.

[0004]

By the way, in the above-described CRT, the panel glass surface is not flat, and the peripheral portion has a sag generated by polishing of about 0.4 to 0.7 mm as compared with the central portion. Therefore, the adhesive layer 18 of the ultraviolet curing resin is formed thin at the center of the panel glass and thick at the periphery. For this reason, conventionally, the ultraviolet irradiation time is set based on the curing characteristics of the ultraviolet curable resin and the thickness of the ultraviolet curable resin layer in the peripheral portion of the panel glass. For example, an irradiation time of about 20 to 25 seconds is required. .

An object of the present invention is to provide a method and an apparatus for manufacturing a CRT capable of shortening the time of irradiating ultraviolet rays for curing the adhesive layer and improving the productivity.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for manufacturing a CRT having a step of bonding a light-transmitting functional film to a surface of a panel glass by interposing an ultraviolet curing agent. After bonding the functional film to the surface of the panel glass via an ultraviolet curing agent, when irradiating ultraviolet light from the front surface of the functional film, the illuminance distribution of the ultraviolet light changes according to the thickness of the ultraviolet curing agent layer. It is characterized in that it is made to be. The present invention also provides a cathode ray line having a device for bonding a light-transmissive functional film with an ultraviolet curing agent interposed on the surface of the panel glass and irradiating ultraviolet rays from the front of the functional film to cure the ultraviolet curing agent. An apparatus for manufacturing a tube, wherein the ultraviolet irradiation apparatus for irradiating the ultraviolet light is characterized in that ultraviolet light is strongly distributed in a thick portion of the ultraviolet curing agent layer.

In the method of manufacturing a CRT according to the present invention, the illuminance distribution of the ultraviolet rays is changed according to the thickness of the ultraviolet curing agent layer, so that the ultraviolet rays have an intensity corresponding to the thickness of the ultraviolet curing agent layer. , And the entire ultraviolet curing agent layer can be cured with a substantially uniform curing time, and the irradiation time of ultraviolet rays can be shortened. In the CRT manufacturing apparatus according to the present invention,
By providing an ultraviolet irradiation device for strongly distributing ultraviolet light to the thick portion of the ultraviolet curing agent layer, it is possible to cure the ultraviolet curing agent layer with a substantially uniform curing time as a whole, thereby shortening the ultraviolet irradiation time. It becomes possible.

[0008]

Next, an embodiment of a method and an apparatus for manufacturing a CRT according to the present invention will be described.
FIG. 1 is a cross-sectional view showing a configuration example of an ultraviolet irradiation apparatus used in an ultraviolet irradiation step in the method of manufacturing a CRT according to the present invention. Note that the structure of the CRT in this example is the same as that shown in FIG. 2 described above, and the steps up to the step of attaching the functional film to the CRT are the same as those shown in FIG. The following description will be made with the help of. As shown in FIG. 2, the CRT 10 is configured by joining a funnel glass 12 and a panel glass 14 with a frit glass part 16, and the surface of the panel glass 14
A functional film 20 is attached via an adhesive layer 18 made of an ultraviolet curable resin.

To attach the functional film 20 to the panel glass 14 in such a CRT 10, first, as shown in FIG. 3, an adhesive layer 18 made of an ultraviolet curable resin in accordance with the bending rate of the panel glass 14 is applied to the panel glass 14. Glass 1
4 is applied to the surface. Thereafter, the functional film 20 is arranged on the adhesive layer 18, and the rubber roller 22 is rolled over the adhesive film 18 and pressed thereon to attach the functional film 20, and then, as shown in FIG. 2 irradiates ultraviolet rays to cure the ultraviolet curing resin of the adhesive layer 18. The surface of the panel glass 14 is not flat, and the peripheral portion has sag generated by polishing about 0.4 to 0.7 mm as compared with the central portion. It is thin at the center and thick at the periphery.

As shown in FIG. 1, the ultraviolet irradiation device 2 of the present embodiment has a light source lamp 4 for generating ultraviolet light and a reflector 6 disposed on the rear surface of the light source lamp 4.
As the light source lamp 4, a mercury lamp, a metal halide lamp, a xenon lamp, a chemical lamp, or the like is used as in the related art. The reflecting plate 6 effectively uses the ultraviolet light emitted from the light source lamp 4, and mainly reflects the ultraviolet light emitted backward from the light source lamp 4 forward.
It is supplied to the adhesive layer 18 of the CRT 10. This reflecting plate 6
It has a main reflector 6A arranged to face the panel glass 14 and a sub reflector 6B formed continuously around the periphery of the main reflector 6A and bent in the direction of the panel glass 14.

An extension 6C is formed by further extending the sub-reflector 6B to a position near the outer periphery of the panel glass 14. That is, the extension 6C extends to a position close to the outer periphery of the panel glass 14, is formed substantially parallel to the optical axis direction of the CRT 10, and is disposed so as to cover the outer periphery of the adhesive layer 18. ing. That is, the reflector 6 of the present embodiment is obtained by adding an extension 6C to the conventional reflector 28 shown in FIG. 4 described above, and the peripheral portion of the reflector 6 and the adhesive layer 18 which have been conventionally arranged. By disposing the extension 6C in the gap with the outer peripheral edge of the
The ultraviolet rays leaking from the gap are reflected to the adhesive layer 18 side. The reflected light from the extension 6C is strongest at the outer peripheral edge of the adhesive layer 18 and gradually weakens toward the center.

By the action of the extension 6C, a portion near the outer peripheral portion of the adhesive layer 18 is irradiated with stronger ultraviolet rays. Therefore, the ultraviolet distribution in the outer peripheral portion of the adhesive layer 18 formed thicker than in the central portion becomes stronger. As a result, the central portion of the adhesive layer 18 is irradiated with relatively weak ultraviolet light, and the outer peripheral portion is irradiated with relatively strong ultraviolet light. As a result, the adhesive layer 18 having a different thickness between the central portion and the outer peripheral portion. Can be cured with a substantially uniform curing time as a whole, the curing time can be shortened, the time of the ultraviolet irradiation step can be reduced, and the productivity can be improved.
For example, as a result of the actual measurement, the irradiation time was about 17 to 21 seconds, which was about 20 to 25 seconds, and the production efficiency was 2
It can be improved by about 0%. In particular, in this example, the above-described effects can be obtained with a simple structure in which the extension 6C is added to the conventional reflector, and an extremely practical device can be provided.

[0013]

As described above, the CR according to the present invention is used.
In the method of manufacturing T, a functional film is adhered to the surface of a panel glass of a CRT via an ultraviolet curing agent, and when irradiating ultraviolet light to the functional film, the illuminance distribution of the ultraviolet light corresponds to the thickness of the ultraviolet curing agent layer. Was changed. Therefore, since the ultraviolet ray can be irradiated with the intensity corresponding to the thickness of the ultraviolet curing agent layer, the ultraviolet curing agent layer can be hardened with a substantially uniform curing time as a whole, and the irradiation time of the ultraviolet ray can be reduced. It becomes possible. Also, the CR according to the present invention
In the manufacturing apparatus of T, the ultraviolet irradiation device for irradiating the ultraviolet light strongly distributes the ultraviolet light to the thick portion of the ultraviolet curing agent layer. Therefore, it is possible to cure the ultraviolet curing agent layer as a whole with a substantially uniform curing time, and it is possible to shorten the ultraviolet irradiation time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration example of an ultraviolet irradiation device used in an ultraviolet irradiation step in a method of manufacturing a CRT according to the present invention.

FIG. 2 is a side view showing an example of a CRT provided with a functional film.

FIG. 3 is a side view illustrating a step of attaching a functional film to a CRT.

FIG. 4 is a cross-sectional view illustrating a configuration example of a conventional ultraviolet irradiation device.

[Explanation of symbols]

2 ... UV irradiation device, 4 ... Light source lamp, 6 ... Reflector, 6A ... Main reflection section, 6B ... Sub reflection section, 6C
... Extended part, 10 ... CRT, 12 ... Funnel glass, 14 ... Panel glass, 16 ... Frit glass part, 18 ... Adhesive layer, 20 ... Functional film, 22 ...
Rubber roller.

Claims (5)

[Claims] 1. A method for manufacturing a cathode ray tube, comprising the step of bonding an optically transparent functional film by interposing an ultraviolet curing agent on the surface of a panel glass, wherein the method comprises the steps of: After bonding the functional film, when irradiating ultraviolet rays from the front surface of the functional film, corresponding to the thickness of the ultraviolet curing agent layer, to change the illuminance distribution of ultraviolet rays, characterized in that the cathode ray tube Production method. 2. A cathode ray tube having a device for bonding a light-transmitting functional film to a surface of a panel glass by interposing an ultraviolet curing agent and irradiating ultraviolet light from the front surface of the functional film to cure the ultraviolet curing agent. The apparatus for manufacturing a cathode ray tube, wherein the ultraviolet irradiation apparatus for irradiating the ultraviolet rays strongly distributes the ultraviolet rays to a thick portion of the ultraviolet curing agent layer. 3. The cathode ray tube manufacturing apparatus according to claim 2, wherein said ultraviolet curing agent layer is formed thick in a portion near an outer peripheral portion of the panel glass. 4. The ultraviolet irradiation device, comprising: an ultraviolet irradiation light source; and an ultraviolet irradiation plate disposed on a rear surface of the irradiation light source and reflecting forwardly ultraviolet light emitted backward from the irradiation light source, The ultraviolet irradiating plate has a main reflector arranged in a state facing the panel glass, and a sub-reflector formed continuously on a peripheral portion of the main reflector and bent in the direction of the panel glass. By extending the sub-reflection portion to a position close to the outer peripheral portion of the panel glass, the ultraviolet light distribution to the ultraviolet curing agent layer at the outer peripheral portion of the panel glass is enhanced. An apparatus for manufacturing a cathode ray tube according to claim 3. 5. The sub-reflecting portion has an edge extending to a position close to an outer peripheral portion of the panel glass formed substantially parallel to an optical axis direction of the cathode ray tube. The apparatus for manufacturing a cathode ray tube according to claim 4, wherein the apparatus is arranged so as to cover a peripheral portion.