JPH07104121A - Color filter for fluorescent display tube - Google Patents

Abstract

PURPOSE:To improve contrast, to improve workability and to obtain the chromaticity adjustment function of a luminescent color by sticking a coloring layer with two sheets of a transparent plastic film and forming a transparent adherent layer and a peeling film on one surface of a plastic film in order. CONSTITUTION:The coloring layer 2 has the duty to execute the chromaticity adjustment of the luminescent color of a fluorescent display tube, and used to stick two sheets of plastic film 1a and 1b and incorporates a colorant in resin. When sufficient adhesive strength is not obtained only by the coloring layer 2, a bonding layer may be provided. Then, the transparent adherent layer 4 consisting of acrylic resin, urethane resin, polyester resin, silicone resin, etc., and the peeling film 5 are formed on one surface of the plastic film 1b in order. In this way, the color filter for the fluorescent display tube having no any fear of falling of the coloring layer, and also having no any fear of discoloration and color degradation of the coloring layer and having a fixed color over a long period of time is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to display the operating status and operating method of home appliances such as audio equipment, VCRs, microwave ovens, etc., machine tools, automobiles, copiers and the like. The present invention relates to a color filter used in a fluorescent display tube, and more particularly to a color filter for a fluorescent display tube that improves contrast and adjusts chromaticity of emission color.

[0002]

2. Description of the Related Art Conventionally, a color filter made of a colored acrylic plate having a thickness of about 2 to 5 mm is provided on the glass surface of a fluorescent display for the purpose of improving contrast and displaying only a display pattern clearly. There is. In order to dispose the acrylic plate on the front surface of the display unit, it is necessary to provide a chassis for fixing the acrylic plate on the display unit of the fluorescent display tube, and it has not been possible to meet the recent demand for weight reduction and compactness. Attempts have been made to reduce the weight by thinning the acrylic plate, but this is not preferable because the cost becomes high. In order to solve these problems and prevent from being attacked by the solvent used in the cleaning process during manufacturing,
It has been practiced to print a coloring ink, which is composed of a solvent-resistant resin such as thermosetting epoxy resin and a coloring agent, directly on the glass surface of a fluorescent display tube by silk screen printing or the like to form a printing filter. It was

[0003]

However, in the conventional printing filter, if the color tone or density of the filter after printing is different from the desired one, either the fluorescent display tube is defective or the coloring ink is not used. The colored ink must be removed and reprinted.Because the colored ink uses a solvent-resistant resin, the ink cannot be removed with the solvent, so the colored ink must be physically scraped off with a cutter or the like. However, it has the drawback of poor workability (reduction of yield). Further, in the conventional method, since only the glass surface of the display portion of the fluorescent display is printed, the color is easily discolored or faded during use, which is not preferable. The present invention has been made to solve the above problems, and provides a color filter for a fluorescent display tube that improves contrast and has a function of adjusting the chromaticity of emission color, and that has improved workability. To aim.

[0004]

Means for Solving the Problems As a result of intensive studies to achieve such an object, a colored plastic having a transparent adhesive layer on the surface of the display portion without printing on the display portion of the fluorescent display tube By sticking the film, you can adjust the color density and brightness in advance before sticking, you can also inspect foreign substances such as dust, and if the sticking fails, peel it off and stick it again. The present invention has been completed by finding that the workability such as the above can be improved.
That is, the color filter for a fluorescent display of the present invention has a resin layer containing a coloring agent (hereinafter, referred to as a coloring layer) between two transparent plastic films, and further has a transparent adhesive on one transparent plastic film. It is characterized in that a layer and a release film are formed in this order.

The color filter for a fluorescent display tube of the present invention will be described below. Plastic film 1a, 1
b is acrylic, polyvinyl chloride, polyvinylidene chloride, polystyrene, polypropylene, cellulose acetate, polyester, polycarbonate, polyethylene,
Examples thereof include those using resins such as polyvinyl alcohol. Among these, a biaxially stretched polyester film is preferably used. Plastic film 1a,
1b may be mixed with an antistatic agent or the like in order to impart antistatic properties, or may be provided with an antistatic agent layer. Further, a subbing treatment may be performed to improve the adhesiveness.

The plastic films 1a, 1b must be transparent. The transparency in this case is HAZ
It is sufficient if the E value has a transparency of 10% or less. If the Haze value is larger than 10%, the display portion cannot be seen clearly, which is not preferable. If you have such transparency,
The surface may be roughened, or a Japanese paper or the like may be attached to the surface. Plastic film 1a,
Each thickness of 1b is 2 μm to 125 in terms of workability.
μm is preferable, and 20 μm to 100 μm is more preferably used. The reason why the thickness is 2 μm or more is to improve the workability by sticking out, and the reason that the thickness is 125 μm or less is to facilitate the sticking with a laminator or the like.

The colored layer 2 serves to adjust the chromaticity of the emission color of the fluorescent display tube and is a layer for adhering the two plastic films 1a and 1b together, and contains a coloring agent in the resin. It is composed of The resin used in the colored layer 2 is a vinyl acetate resin, a modified vinyl acetate resin, a modified vinyl acetate / acrylic copolymer resin, an ethylene / vinyl acetate copolymer resin, a polyester resin, an acrylic copolymer resin. , Cellulosic resin, vinyl chloride
One or more of vinyl acetate-based copolymer resin, urethane-based resin, epoxy-based resin, modified polyvinyl alcohol-based resin, acrylonitrile rubber and the like are preferably used.

As the colorant, C.I. I. Solvent Yellow 14, 16, 19, 21, 25, 32, 33, 5
6, 151, C.I. I. Solvent Orange 5, 6, 4
0, 45, C.I. I. Solvent Red 3, 8, 18, 2
4, 27, 35, 49, 82, 83, 84, 100, 1
09, 122, 132, 218, C.I. I. Solvent Blue 25, 35, 48, 70, 94, 117, C.I. I.
Solvent Black 3, 7, 22, 27, 42, 43,
123, C.I. I. Oil-soluble dyes such as Solvent Brown 37, C.I. I. Disperse Blue 7, 60, C.I. I. Disperse Red 60, C.I. I. Disperse dyes such as Disperse Yellow 64, C.I. I. Direct black 17,
C. I. Direct dyes such as Direct Yellow 44, C.I.
I. Pigment Yellow 42, C.I. I. Pigment Red 101, C.I. I. Pigment Blue 27, C.I. I. Pigment Black 7 and other inorganic pigments such as C.I. I. Pigment Yellow 12, 83, 138, C.I. I. Pigment Orange 16, C.I. I. Pigment Red 2, 3,
5, 17, 22, 23, 48, 237, C.I. I. Pigment Blue 15, C.I. I. Pigment Green 36 and the like, and one or more kinds of organic colored pigments are preferably used.

The amount of the colorant added cannot be generally determined depending on the kind of the colorant, but is 0.01 per 100 parts by weight of the resin.
To 200 parts by weight, more preferably 0.5 to 100 parts by weight. The amount of 0.01 parts by weight or more is for facilitating toning, and the amount of 200 parts by weight or less is for maintaining the adhesiveness of the resin. The coloring layer 2 may optionally contain a leveling agent, an antistatic agent, an ultraviolet absorber, and other additives.

The thickness of the colored layer 2 cannot be generally determined depending on the type of resin used, but is usually 0.5 μm to
20 μm is preferable, and 1 μm to 10 μm is more preferable. The thickness of 0.5 μm or more is for obtaining sufficient colorability, and the thickness of 20 μm or less is for preventing uneven density during coating. When the colored layer 2 alone cannot provide a sufficient adhesive force, the adhesive layer 3 can be provided.

The adhesive used as the adhesive layer 3 is a vinyl acetate resin, a modified vinyl acetate resin, a modified vinyl acetate / acrylic copolymer resin, an ethylene / vinyl acetate copolymer resin, a polyester resin, or an acrylic resin. One type or two or more types of a copolymer resin, a cellulose resin, a vinyl chloride / vinyl acetate copolymer resin, a urethane resin, an epoxy resin, a modified polyvinyl alcohol resin, and acrylonitrile rubber are preferably used. The thickness of the adhesive layer 3 is usually preferably 0.5 μm to 15 μm, and 1
μm to 5 μm is more preferable. The thickness of 0.5 μm or more is for obtaining sufficient adhesiveness, and the thickness of 15 μm or less is for preventing the adhesive from sticking. If desired, the adhesive layer 3 may contain coloring agents such as dyes and pigments, ultraviolet absorbers, and other additives.

Further, in the present invention, the plastic film 1
b A transparent adhesive layer 4 made of an acrylic resin, a urethane resin, a polyester resin, a silicone resin or the like and a release film 5 are formed in this order on one surface. 2 like this
By having a colored layer between the transparent plastic films, there is no risk of the colored layer falling off, and there is no risk of discoloration or fading of the colored layer, and fluorescent display with a constant color over a long period of time. Color filters for tubes can be obtained.

As a method for laminating the color filter A for a fluorescent display tube, the colored layer 2 is formed on the plastic film 1a.
Are laminated, the plastic film 1b is laminated on the laminated film, and the transparent adhesive layer 4 and the release film 5 are formed on the plastic film 1b in this order to manufacture.

When the adhesive layer 3 is required, the colored layer 2 and the adhesive layer 3 are sequentially laminated on the plastic film 1a, the plastic film 1b is laminated thereon, and the plastic film 1b is further laminated. The transparent adhesive layer 4 and the release film 5 are formed in this order to manufacture, or the colored layer 2 is laminated on the plastic film 1a, and the adhesive layer 3 is formed on one surface of the other plastic film 1b, and the other is formed. Transparent adhesive layer 4 and release film 5 on the surface of
Are formed in this order, and the colored layer 2 and the adhesive layer 3 are laminated so as to be aligned with each other.

The color filter A for a fluorescent display tube laminated in this way cannot be said unequivocally depending on the type of resin and the like used in each layer, but the total thickness is from 10 μm to 250 μm.
The range of μm is preferable, and the range of 25 μm to 188 μm is more preferable. The thickness of 10 μm or more is for holding the waist to some extent, and the thickness of 250 μm or less is for facilitating attachment to the display portion of the fluorescent display tube with a laminator or the like. Further, a protective layer (not shown) such as a hard coat film made of a thermosetting resin or an ultraviolet curable resin or a protective film made of a plastic film is laminated on the surface of the plastic film opposite to the colored layer. This is preferable because the scratch resistance of the surface is improved.

[0016]

As described above, the color filter for a fluorescent display according to the present invention has a structure in which a colored layer is bonded by two transparent plastic films, and a transparent adhesive layer and a release film are formed in this order on one transparent plastic film. Therefore, there is no risk of the colored layer falling off, and the colorant of the colored layer does not migrate to the transparent adhesive layer, so there is no risk of discoloration or fading, and for fluorescent display tubes having a constant color over a long period of time. A color filter can be obtained. Also, by attaching a color filter made of a plastic film having a desired color tone and light transmittance to the fluorescent display tube, it becomes possible to attach and detach the display section very easily, and to prevent foreign matter, dust, etc. When I entered,
Since it can be attached again, workability can be improved as compared with the conventional print filter.

[0017]

EXAMPLES Examples of the present invention will be described below. Example 1 12 μm thick transparent polyester film (T type:
10 parts by weight of a polyester resin (Vylon # 300: manufactured by Toyobo Co., Ltd.) and an oil-soluble dye (Spiron Blue 2BNH: manufactured by Hodogaya Chemical Co., Ltd.) on 1a of Dia foil Hoechst.
A colored layer coating liquid consisting of 0.5 parts by weight, 10 parts by weight of butyl acetate, and 10 parts by weight of anone was applied by a roll coater to form a colored layer 2 having a dry film thickness of 5 μm. On the colored layer 2 of the transparent polyester film 1a having the colored layer 2 formed thereon, 10 parts by weight of a polyester resin (Vylon # 300: manufactured by Toyobo Co., Ltd.) and 1 part by weight of an isocyanate prepolymer (Coronate L: manufactured by Nippon Polyurethane Industry Co., Ltd.) A coating solution for an adhesive layer consisting of 20 parts by weight of ethyl acetate was applied by a roll coater to form an adhesive layer 3 having a dry film thickness of 2 μm.
Next, on the surface of the adhesive layer 3 of the transparent polyester film 1a on which the colored layer 2 and the adhesive layer 3 thus obtained are formed, a thickness of 12 μm
m transparent polyester film (T type: manufactured by DIAFOIL Hoechst) 1b is laminated, and a transparent adhesive layer (Rikidyne AR-2110: manufactured by Rikidyne) made of acrylic resin is further provided on the transparent polyester film 1b.
And a peeling film (Therapeutic: manufactured by Toyo Metalizing Co., Ltd.) 5 were provided in this order to obtain a color filter A for a fluorescent display tube.

Color filter A for fluorescent display tube of the present invention
Is a fluorescent display tube 20 having a transparent adhesive layer 4 and a phosphor 21.
It could be easily installed by simply adhering it to the display part of and also peeling it off. As a result, a yield of 90% or more could be obtained. Moreover, when a xenon fade meter (WEL-6XS-DC / B / Ec: manufactured by Suga Test Instruments Co., Ltd.) was used and the color change after 200 hours was compared with that before irradiation, discoloration or fading was not observed. Regarding the solvent resistance, the surface of the plastic film was rubbed 100 times with a cloth impregnated with trichloroethane, but there was no discoloration.

Example 2 A transparent polyester film (T type: 12 μm thick)
10 parts by weight of a polyester resin (Vylon # 300: manufactured by Toyobo Co., Ltd.), 1 part by weight of an isocyanate prepolymer (Coronate L: manufactured by Nippon Polyurethane Industry Co., Ltd.), and an oil-soluble dye (Spiron Blue 2BNH) on 1a of Dia foil Hoechst. (Manufactured by Hodogaya Chemical Co., Ltd.) 0.5 part by weight, 10 parts by weight of ethyl acetate and 10 parts by weight of butyl acetate were applied by a roll coater to form a colored layer 2 having a dry film thickness of 7 μm. . Further, on the surface of the transparent polyester film 1a on which the obtained colored layer 2 is laminated, which is opposite to the colored layer 2, an ultraviolet curable acrylic resin (UNIDIC V-
4205: manufactured by Dainippon Ink and Chemicals, Inc.) was provided. Next, on the surface of the colored layer 2 of the transparent polyester film 1a on which the obtained colored layer 2 is formed, a thickness of 12 μm
Transparent polyester film (T type: manufactured by DIAFOIL Hoechst Co., Ltd.) 1b is laminated, and a transparent adhesive layer (Rikidyne AR-2110: manufactured by Rikidyne Co., Ltd.) 4 made of an acrylic resin is further provided on the transparent polyester film 1b, and a release film (therapeutic film). : Toyo Metalizing Co., Ltd.)
5 is provided in this order to provide a color filter A for a fluorescent display tube.
Got

Color filter A for fluorescent display of the present invention
Is a fluorescent display tube 20 having a transparent adhesive layer 4 and a phosphor 21.
It could be easily installed by simply adhering it to the display part of and also peeling it off. As a result, a yield of 90% or more could be obtained. Moreover, when a xenon fade meter (WEL-6XS-DC / B / Ec: manufactured by Suga Test Instruments Co., Ltd.) was used and the color change after 200 hours was compared with that before irradiation, discoloration or fading was not observed. Regarding the solvent resistance, the surface of the plastic film was rubbed 100 times with a cloth impregnated with trichloroethane, but there was no discoloration. Steel wool # 000 for scratch resistance
When the surface of the protective layer was rubbed 10 times with 0, no scratch was found.

Comparative Example 1 10 parts by weight of an epoxy resin (Epicoat 828: manufactured by Yuka Shell Epoxy Co., Ltd.) and an imidazole-based curing agent (Epicure EMI-24) on a glass surface which is a display portion of a fluorescent display tube 20 having a phosphor 21. : Yuka Shell Epoxy Co., Ltd.)
A colored ink consisting of 1 part by weight and 0.25 part by weight of an oil-soluble dye (Spiron Blue 2BNH: Hodogaya Chemical Co., Ltd.) was silk-screen printed to form a print filter having a dry film thickness of 10 μm.

Since the formed print filter was firmly adhered to the surface of the glass of the fluorescent display tube and could not be peeled off, the printed portion had to be scraped off using a cutter. Due to this, the yield was very poor. Also, a xenon fade meter (WEL-6XS-DC / B / Ec: manufactured by Suga Test Instruments Co., Ltd.)
When the color change after 200 hours was compared with that before irradiation, the color change occurred. Regarding the solvent resistance, the surface of the printing filter was rubbed 100 times with a cloth impregnated with trichloroethane, but no discoloration occurred. Regarding the scratch resistance, when the surface of the print filter was rubbed 10 times with steel wool # 0000, scratches were formed.

[0023]

As described above, in the color filter for a fluorescent display according to the present invention, the colored layer is attached by two transparent plastic films, and the transparent adhesive layer and the release film are formed in this order on one transparent plastic film. With this configuration, there is no risk of the colored layer falling off, and the colorant of the colored layer does not migrate to the adhesive layer, so there is no risk of discoloration or fading, and for fluorescent display tubes that have a constant color over a long period of time. Can be obtained. Also, by attaching a color filter made of a plastic film having a desired color tone and light transmittance to the fluorescent display tube, it becomes possible to attach and detach the display section very easily, and to prevent foreign matter, dust, etc. When it enters, it can be reattached, so that it has many excellent effects such as improved workability as compared with the conventional print filter.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view when the color filter for a fluorescent display tube of the present invention is attached to the fluorescent display tube.

[Explanation of symbols]

 1a, 1b ... Plastic film 2 ... Coloring layer 4 ... Transparent adhesive layer 5 ... Release film

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kyoko Sugiyama 4-63 Suzuya, Yono City, Saitama Prefecture Kimoto Development Research Institute

Claims (2)

[Claims] 1. A fluorescent material comprising a resin layer containing a colorant between two transparent plastic films, and a transparent adhesive layer and a release film formed on one transparent plastic film in this order. Color filter for display tubes. 2. The color filter for a fluorescent display tube according to claim 1, wherein a protective layer is formed on the other transparent plastic film.